EP3962699B1 - Protective device for a tool and system comprising a protective device and a tool - Google Patents
Protective device for a tool and system comprising a protective device and a tool Download PDFInfo
- 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
- Authority
- EP
- European Patent Office
- Prior art keywords
- tool
- protective device
- protective
- handle
- damping elements
- 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.)
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Links
- 230000001681 protective effect Effects 0.000 title claims description 199
- 238000013016 damping Methods 0.000 claims description 75
- 230000007704 transition Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 230000010355 oscillation Effects 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000013013 elastic material Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000006735 deficit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
Images
Classifications
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- 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
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- 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).
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- 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)
Description
Die vorliegende Erfindung betrifft eine Schutzvorrichtung für einen Akkumulator in einem Werkzeuggerät. Bei dem Werkzeuggerät kann es sich insbesondere um ein handgeführtes, akkubetriebenes Gerät, wie einen Trennschleifer, handeln. Vorzugsweise weist das Werkzeuggerät in einem Hauptbereich Hauptkomponenten, wie Motor, Getriebe und Akkumulatoren auf, die durch die Schutzvorrichtung wirksam gegenüber mechanischen Beschädigungen, zum Beispiel bei einem Sturz, geschützt werden. Darüber hinaus verhindert die Schutzvorrichtung die Übertragung von Vibrationen des Werkzeuggeräts auf den Nutzer. In einem zweiten Aspekt betrifft die Erfindung ein System, das eine Schutzvorrichtung und ein Werkzeuggerät umfasst.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. In addition, the protective device prevents the transmission of vibrations from the tool to the user. In a second aspect, the invention relates to a system comprising a protective device and a tool device.
Es sind im Stand der Technik Trennschleifer für Trennscheiben mit einem Durchmesser von 300 mm und größer bekannt, die üblicherweise mit einem kabelgeführten Netzanschluss oder mit einem Verbrennungsmotor betrieben werden. Dabei sind beispielsweise Leistungsaufnahmen von mehr als 2,0 kW üblich. Bei den Verbrennungsmotoren handelt es sich zumeist um Zweitaktmotoren. Nachteilig an diesen konventionellen Trennschleifern, die aus dem Stand der Technik bekannt sind und mit einem Netzanschluss bzw. einem Verbrennungsmotor als Energiequelle betrieben werden, ist, dass sie entweder ein Kabel zur Übertragung der elektrischen Energie aufweisen, welches bei Betrieb des Trennschleifers ein Sicherheitsrisiko darstellen kann. Durch die Verwendung eines Verbrennungsmotors als Energiequelle können zwar hohe Leistungen erreicht werden, wie sie für die Arbeit mit großen Trennscheiben erforderlich sind. Allerdings weisen Verbrennungsmotoren die üblichen Nachteile auf, dass beispielsweise stets ein Brennstoff verfügbar sein und mitgeführt werden muss oder dass es zu Schall- und Schadstoffemissionen kommen kann.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 . By using an internal combustion engine as an energy source, high performance levels can be achieved, such as those required for working with large cutting discs. However, 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.
Es sind daher akkubetriebene Trennschleifer entwickelt worden, um den Verkabelungsaufwand und das damit verbundene Sicherheitsrisiko zu minimieren bzw. um auf die Vorsehung von Verbrennungsmotoren verzichten zu können. Diese akkubetriebenen Trennschleifer arbeiten beispielsweise mit einer Leistungsaufnahme von 1,5 kW und Trennscheiben mit einem Durchmesser von 230 mm. Allerdings wurden zu diesen neuen akkubetriebenen Trennschleifern keine überzeugenden Konzepte für die Vibrationsdämpfung vorgestellt, so dass bei den bisher bekannten Lösungen die Vibrationen, die bei Betrieb des Trennschleifers auftreten, im Wesentlichen ungedämpft auf den Nutzer übertragen werden. Es ist bekannt, dass eine solche ungedämpfte Übertragung von Vibrationen insbesondere die Gelenke des Nutzers schädigen kann. Insbesondere weisen bekannte Akku-Trennschleifer keine Vibrationsdämpfung auf, so dass keine Reduzierung der Vibrationsauswirkungen auf den Anwender erfolgt.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, for example, work with a power consumption of 1.5 kW and cutting discs with a diameter of 230 mm. However, 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. In particular, known cordless power cutters have no vibration damping, so that there is no reduction in the impact of vibration on the user.
Ein weiterer Nachteil an den bekannten Akku-Trennschleifer besteht darin, dass sie im Vergleich zu bekannten Netz- bzw. Benzingeräten erheblich schwerer sind, d.h. ein höheres Gewicht aufweisen. Darüber hinaus macht die Energieversorgung basierend auf Akkumulatoren die Vorsehung eines vergrößerten Bauraums für die Akkumulatoren erforderlich, so dass die Geräte unhandlich und schwer zu bedienen sind. Dies ist besonders bei Langzeitanwendungen unangenehm. Um ein akkubetriebenes Werkzeuggerät, bzw. seine Akkumulatoren vor Sturzschäden zu schützen, werden diese häufig mit einem robusten Aufbau versehen. Dies kann allerdings nachteiligerweise zu einer weiteren Erhöhung des Gewichts eines Akku-Werkzeuggeräts führen.Another disadvantage of the known cordless power cutters is that they are significantly heavier, i.e. have a higher weight, compared to known mains or gasoline devices. In addition, the 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. In order to protect a battery-operated tool or its accumulators from damage caused by falls, they are often provided with a robust structure. However, this can disadvantageously lead to a further increase in the weight of a cordless tool.
Beispielsweise wird in der
Es ist daher Aufgabe der vorliegenden Erfindung, die vorstehend beschriebenen Nachteile ackubetriebener Werkzeuggeräte, wie beispielsweise Trennschleifern, zu überwinden und eine Schutzvorrichtung für Werkzeuggeräte, insbesondere handgeführte, akkubetriebene Trennschleifer, bereitzustellen, mit der eine Übertragung von Vibrationen des Werkzeuggeräts auf den Nutzer verhindert werden kann, um insbesondere die Gelenke des Nutzers zu schonen und Langzeitbeeinträchtigungen für den Nutzer zu vermeiden. Darüber hinaus wäre es wünschenswert, wenn mit der bereitzustellenden Schutzvorrichtung die Robustheit des Werkzeuggeräts gesteigert werden könnte, um mechanische Schäden an dem Werkzeuggerät, beispielsweise bei Stürzen, zu vermeiden. Ein weiteres Anliegen der Erfindung besteht darin, dass mit der Erfindung ein möglichst gewichtsoptimierter Aufbau des Werkzeuggeräts ermöglicht werden soll, um ein handliches, kompaktes und möglichst leichtes Gerät konstruieren zu können, das auch bei Langzeitbenutzung komfortabel verwendet werden kann.It is therefore 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. In addition, it would be desirable if 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. A further concern of the invention is that 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 use.
Die Aufgabe wird gelöst durch die Merkmale der unabhängigen Ansprüche. Bevorzugte Ausführungsformen der Erfindung finden sich in den Unteransprüchen.The task is solved by the features of the independent claims. Preferred embodiments of the invention can be found in the subclaims.
Die vorliegende Erfindung betrifft eine Schutzvorrichtung für einen Akkumulator in einem Werkzeuggerät, wobei das Werkzeuggerät einen Motor, ein Getriebe und mindestens einen Akkumulator als Hauptkomponenten umfasst. Die Schutzvorrichtung ist dadurch gekennzeichnet, dass sie als Schutzrahmen ausgebildet ist, wobei das Werkzeuggerät so in die Schutzvorrichtung eingebracht werden kann, dass die Schutzvorrichtung das Werkzeuggerät umgibt, wobei eine Verbindung zwischen Werkzeuggerät und Schutzvorrichtung durch eine Anzahl von Berührungspunkten hergestellt werden kann, wobei an diesen Berührungspunkten zwischen Werkzeuggerät und Schutzvorrichtung Dämpfelemente vorgesehen sind.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.
Mit anderen Worten ist das Werkzeuggerät so in die Schutzvorrichtung einbringbar, dass die Schutzvorrichtung die Hauptkomponenten des Werkzeuggeräts vorteilhafterweise umhüllt und wirksam vor äußeren, mechanischen Einflüssen, wie Stürzen oder Schlägen, schützt. Vorzugsweise ist eine Verbindung zwischen Werkzeuggerät und Schutzvorrichtung durch die Vorsehung von Berührungspunkten herstellbar, wobei an diesen Berührungspunkten zwischen Werkzeuggerät und Schutzvorrichtung Dämpfelemente angeordnet vorliegen. Die Dämpfelemente sorgen vorzugsweise für eine vibrationstechnische Entkopplung von Werkzeuggerät und Schutzvorrichtung. Mit anderen Worten sind die Dämpfelemente dazu eingerichtet, das Werkzeuggerät und die Schutzvorrichtung vibrationstechnisch zu entkoppeln.In other words, 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. Preferably, 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. In other words, the damping elements are designed to decouple the tool and the protective device from a vibration point of view.
Obwohl die Beschreibung der Schutzvorrichtung auf das Werkzeuggerät Bezug nimmt, wird die Schutzvorrichtung nicht durch Merkmale des Werkzeuggeräts gekennzeichnet, sondern ist insbesondere für die Verwendung mit einem Werkzeuggerät geeignet. Trotz der Bezugnahme auf das Werkzeuggerät sind die Merkmale der Schutzvorrichtung für den Fachmann daher insbesondere nicht unklar formuliert. Der Fachmann weiß beispielsweise, wie der hintere Bereich eines vorzugsweise akkubetriebenen Werkzeuggeräts beschaffen ist und welche Abmessungen der hintere Bereich eines solchen Werkzeuggeräts aufweisen kann. Er wird daher das Merkmal, wonach die Schutzvorrichtung so ausgebildet ist, dass sie den hinteren Teil eines Werkzeuggeräts aufnehmen kann, in der Weise auffassen, wie es beispielsweise in den Figuren dargestellt ist.Although the description of 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. Despite the reference to the 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.
Insbesondere umfasst die vorgeschlagene Schutzvorrichtung eine rahmenartige Vorrichtung, die vorzugsweise aus den beiden Griffen und dem Schutzrahmen gebildet ist. Die genannten Bestandteile der rahmenartigen Vorrichtung umschließen vorzugsweise einen hohlen Innenraum, der dazu eingerichtet ist, den hinteren Teil eines Werkzeuggeräts aufzunehmen. In diesem hinteren Teil des Werkzeuggeräts sind vorzugsweise die Hauptkomponenten des Werkzeuggeräts angeordnet, die somit von der rahmenartigen Vorrichtung umhüllt und von dieser geschützt werden können. Der hintere Bereich des Werkzeuggeräts wird vorzugsweise auch als Hauptbereich des Werkzeuggeräts bezeichnet. Vorteilhafterweise ermöglicht die vorgeschlagene Schutzvorrichtung einen überraschend leichten und gleichzeitig robusten Aufbau des Werkzeuggeräts, sowie ein vibrationsarmes Arbeiten mit einem Werkzeuggerät, das mit einer vorgeschlagenen Schutzvorrichtung verbunden vorliegt. Die vorliegende Erfindung betrifft insbesondere eine Schutzvorrichtung für ein akkubetriebenes Werkzeuggerät, vorzugsweise eine Schutzvorrichtung für einen akkubetriebenen Trennschleifer für Trennscheiben mit einem Durchmesser von 300 mm oder größer.In particular, 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. 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. Advantageously, 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.
Neben den Griffen und dem Schutzrahmen umfasst die vorgeschlagene Schutzvorrichtung vorzugsweise eine Anzahl von Dämpfelementen. Die Vorsehung der Dämpfelemente führt vorteilhafterweise dazu, dass das Werkzeuggerät und die Schutzvorrichtung schwingungstechnisch voneinander entkoppelt werden können. Dadurch wird vorteilhafterweise verhindert, dass Schwingungen und Vibrationen des Werkzeuggeräts auf die Schutzvorrichtung, insbesondere die Handgriffe, übertragen werden. Nachdem das Werkzeuggerät bei seiner Verwendung vorzugsweise an Bestandteilen der Schutzvorrichtung, wie den Griffen, gehalten bzw. geführt wird, wird der Nutzer des Werkzeuggeräts durch die vorgeschlagene Schutzvorrichtung wirksam vor den Vibrationen geschützt, denn mit der vorgeschlagenen Erfindung kann verhindert werden, dass die von dem Werkzeuggerät ausgehenden Vibrationen auf den Nutzer bzw. seine Gelenke übertragen werden. Zum einen reduziert die Erfindung somit die Vibrationsbelastung für den Nutzer des Werkzeuggeräts, zum anderen schützt die vorgeschlagene Schutzvorrichtung das Werkzeug wirksam vor Beschädigungen, beispielsweise im Falle eines Sturzes oder wenn Gegenstände auf das Gerät fallen. Insbesondere wird die Robustheit des Werkzeuggeräts wesentlich erhöht. Durch die Vorsehung der Schutzvorrichtung kann vorteilhafterweise auch der Schutzaufwand, der am Werkzeuggerät selbst vorgenommen werden muss, reduziert werden. Dadurch kann ein besonders leichtes, kompaktes und handliches Werkzeuggerät bereitgestellt werden, mit dem der Nutzer lange beschwerde- und komplikationsfrei und komfortabel arbeiten kann. Als Dämpfelemente können beispielsweise Federn, Gummidämpfer oder kombinierte Elemente verwendet werden. Insbesondere sind die eingesetzten Dämpfelemente dazu geeignet, eine Vibrationsbelastung für den Anwender zu reduzieren.In addition to the handles and the protective frame, 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. On the one hand, 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. In particular, the robustness of the tool is significantly increased. 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. For example, springs, rubber dampers or combined elements can be used as damping elements. In particular, the damping elements used are suitable for reducing vibration stress for the user.
Es ist im Sinne der Erfindung bevorzugt, dass die Schutzvorrichtung einen ersten Griff und einen zweiten Griff umfasst, sowie Dämpfelemente. Vorzugsweise ist die Schutzvorrichtung dazu eingerichtet, die Hauptkomponenten des Werkzeuggeräts von dem ersten und dem zweiten Griff vibrationstechnisch zu entkoppeln. Der erste Griff und der zweite Griff sind vorzugsweise als Halte- oder Handgriffe ausgebildet, so dass der Nutzer das Werkzeuggerät mit den Griffen halten und/oder führen kann. Es ist im Sinne der Erfindung bevorzugt, dass das Werkzeuggerät im Wesentlichen zwei Bereiche umfasst. In einem vorderen Bereich des Werkzeuggeräts kann das Arbeitsmittel vorgesehen sein. Dabei kann es sich zum Beispiel um eine Trennscheibe handeln, wenn das Werkzeuggerät ein Trennschleifer ist. Mit anderen Worten kann das Werkzeuggerät neben den Hauptkomponenten ein Arbeitsmittel umfassen, das vorzugsweise eine Trennscheibe für einen Trennschleifer darstellt. Das Arbeitsmittel wird vorzugsweise mit einem Blattschutz geschützt, um zu verhindern, dass Späne oder Partikel vom Arbeitsmittel in Richtung des Nutzers geworfen werden.For the purposes of the invention, it is preferred that the protective device comprises a first handle and a second handle, as well as damping elements. Preferably, 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. For the purposes of the invention, it is preferred that 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. In other words, 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.
In einem hinteren Bereich des Werkzeuggeräts können die Hauptkomponenten, wie Motor, Getriebe und Akku, vorgesehen sein. Dieser Bereich wird im Sinne der Erfindung bevorzugt auch als Hauptbereich des Werkzeuggeräts bezeichnet. Vorzugsweise umgibt die vorgeschlagene Schutzvorrichtung insbesondere diesen hinteren Bereich des Werkzeuggeräts. Es ist im Sinne der Erfindung bevorzugt, dass der hintere Bereich des Werkzeuggeräts eine im Wesentlichen quaderförmige, dreidimensionale Form aufweist. In einem unteren Bereich dieses Quaders können beispielsweise zwei Akkus vorgesehen sein, die als Energiequelle für das Werkzeuggerät dienen. Darüber können beispielsweise das Getriebe und der Motor des Werkzeuggeräts angeordnet vorliegen.The main components, such as motor, gearbox and battery, can be provided in a rear area of the tool. For the purposes of the invention, 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. For the purposes of the invention, it is preferred that 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. For example, the gearbox and the motor of the tool device can be arranged above this.
Um den gleichzeitig leichten und robusten Aufbau des Werkzeuggeräts und das vibrationsarme Arbeiten mit dem Werkzeuggerät zu ermöglichen, ist es im Sinne der Erfindung bevorzugt, dass die Masse des Werkzeuggeräts von den Handgriffen der Schutzvorrichtung entkoppelt wird. Dadurch kann vorteilhafterweise die Lage des Schwerpunkts innerhalb des Werkzeuggeräts dahingehend optimiert werden, dass der Schwerpunkt im Wesentlichen zentral innerhalb des Geräts liegt. Dadurch kann die Bedienung und die Führung des Werkzeuggeräts für den Anwender wesentlich erleichtert werden.In order to enable the lightweight and robust construction of the tool and low-vibration work with the tool, it is preferred in the sense of the invention that the mass of the tool is decoupled from the handles of the protective device. As a result, 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.
Die Entkopplung der Masse des Werkzeuggeräts von den Handgriffen der Schutzvorrichtung erfolgt vorzugsweise unter Verwendung der Dämpfelemente, die an den Berührungspunkten zwischen der Schutzvorrichtung und dem Werkzeuggerät vorliegen. Vorzugsweise wird die Entkopplung der Gerätemasse von den Handgriffen dadurch erreicht, dass insbesondere die Hauptkomponenten des Werkzeuggeräts von den Handgriffen entkoppelt werden. Zusätzlich umfasst die Schutzvorrichtung zum Schutz der Akkumulatoren bzw. des Werkzeuggeräts einen Schutzrahmen, der mit den Griffen vorzugsweise eine feste Einheit bildet. Es ist im Sinne der Erfindung insbesondere bevorzugt, dass der Rahmen mit dem ersten und dem zweiten Griff eine vorzugsweise umlaufende starre Einheit als Schutzvorrichtung bildet, die vom Werkzeuggerät vibrationstechnisch entkoppelt werden kann.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. Preferably, 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. In addition, 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.
Vorzugsweise weist die Schutzvorrichtung mehrere Dämpfelemente auf. Es ist im Sinne der Erfindung bevorzugt, dass die Schutzvorrichtung zwei bis zehn Dämpfelemente und besonders bevorzugt drei bis fünf Dämpfelemente umfasst. Die Dämpfelemente können einzeln und paarweise verwendet werden. Bei einer Vorsehung von fünf Dämpfelementen können beispielsweise drei Entkopplungsbereiche zwischen Schutzvorrichtung und Werkzeuggerät gebildet werden. Beispielsweise können zwei Dämpfelemente einen ersten Entkopplungsbereich bilden, der vorzugsweise im Übergangsbereich zwischen dem ersten Griff und dem Werkzeuggerät angeordnet ist. In diesem ersten Entkopplungsbereich stellen beispielsweise zwei Dämpfelemente eine Verbindung zwischen Schutzvorrichtung bzw. erstem Griff und Werkzeuggerät her, wobei die Dämpfelemente dazu eingerichtet sind, die Schutzvorrichtung und das Werkzeuggerät so voneinander zu entkoppeln, dass im Vergleich zu konventionellen Geräten und Schutzvorrichtungen erheblich weniger Vibrationen vom Werkzeuggerät auf die Schutzvorrichtung und über die Handgriffe auf den Nutzer übertragen werden. Eine solche Reduktion der Übertragung von Vibrationen oder Schwingungen wird im Sinne der Erfindung als vibrations- oder schwingungstechnische Entkopplung von Schutzvorrichtung und Werkzeuggerät bezeichnet. Mit anderen Worten ist es im Sinne der Erfindung bevorzugt, dass die Dämpfelemente Entkopplungsbereiche bilden, wobei die Entkopplungsbereiche jeweils ein Dämpfelement oder zwei Dämpfelemente umfassen.The protective device preferably has several damping elements. For the purposes of the invention, it is preferred that 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. For example, two damping elements can form a first decoupling region, which is preferably arranged in the transition region between the first handle and the tool. In this first decoupling area, for example, two 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. 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. In other words, in the sense of the invention, it is preferred that the damping elements form decoupling regions, the decoupling regions each comprising one damping element or two damping elements.
Ein zweiter Entkopplungsbereich kann vorzugsweise in einem Verbindungsbereich zwischen Schutzvorrichtung und einer Unterseite des Hauptbereichs des Werkzeuggeräts vorliegen. Vorzugsweise umfasst der zweite Entkopplungsbereich ein oder zwei Dämpfelemente, die vorzugsweise eine schwingungstechnische Entkopplung bewirken zwischen dem vorzugsweise massiven bzw. kompakten Hauptbereich des Werkzeuggeräts und der Schutzvorrichtung. Ein dritter Entkopplungsbereich kann in einem hinteren Bereich des Hauptbereichs des Werkzeuggeräts vorliegen. Er umfasst in einer besonders bevorzugten Ausführungsform ein Dämpfungselement, wobei das Dämpfungselement insbesondere den ersten Griff und den Schutzrahmen mit dem Werkzeuggerät verbinden bzw. vibrationstechnisch voneinander entkoppeln.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. Preferably, 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.
Es ist im Sinne der Erfindung bevorzugt, dass es sich bei dem Werkzeuggerät um ein handgeführtes, batteriebetriebenes Werkzeuggerät handelt, welches insbesondere ein Trennschleifer sein kann. Unter dem Begriff "Werkzeuggerät" werden im Rahmen der vorliegenden Erfindung insbesondere diejenigen Werkzeuggeräte zusammengefasst, die ein scheibenförmiges Bearbeitungswerkzeug während der Bearbeitung eines Werkstückes um eine Drehachse antreiben. Typische Beispiele für solche Werkzeuggeräte sind ein Trennschleifer, ein Winkelschleifer und eine Kreissäge. Vorzugsweise ist der vorgeschlagene Trennschleifer dazu eingerichtet, mit Trennscheiben als Arbeitsmittel zu arbeiten, die einen Durchmesser von 300 mm oder größer aufweisen. Der Batteriebetrieb kann insbesondere durch die Vorsehung von mindestens einem Akkumulator gewährleistet werden, der innerhalb des Werkzeuggeräts als aufladbare Energiequelle verwendet wird. Der mindestens eine Akkumulator wird im Sinne der Erfindung vorzugsweise auch als "Akku" bezeichnet.For the purposes of the invention, it is preferred that the tool is a hand-held, battery-operated tool, which can in particular be a cut-off machine. The term “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. For the purposes of the invention, the at least one accumulator is preferably also referred to as a “rechargeable battery”.
Mit der vorliegenden Erfindung wird vorteilhafterweise eine Vibrationsdämpfung für einen handgeführten, akkubetriebenen Trennschleifer bereitgestellt, bei dem insbesondere die Hauptkomponenten des Werkzeuggeräts, wie Motor, Getriebe, Akku und das Arbeitsmittel, zum Beispiel eine Trennscheibe, vibrationstechnisch von den Griffen der Schutzvorrichtung entkoppelt vorliegen. Mit anderen Worten verhindert die vorliegende Erfindung besonders wirksam, dass unerwünschte Schwingungen, Vibrationen und Oszillationen von den Hauptkomponenten des Werkzeuggeräts auf die Handgriffe und damit den Benutzer des Werkzeuggeräts übertragen werden. Vorzugsweise treten die Vibrationen, die bei Betrieb des Werkzeuggeräts entstehen, an diesen Hauptkomponenten auf.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. In other words, 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. Preferably, the vibrations that occur during operation of the tool occur on these main components.
Die Griffe der vorgeschlagenen Schutzvorrichtung stellen vorzugsweise Handgriffe dar, mit denen ein Nutzer das Werkzeuggerät in die Hand nehmen und bedienen kann. Die Schutzvorrichtung umfasst einen ersten Griff und einen zweiten Griff, wobei der erste Griff vorzugsweise auch als hinterer Griff und der zweite Griff als vorderer Griff des Werkzeuggeräts bezeichnet werden kann. Der vordere Griff kann beispielsweise einen Rahmen darstellen, der eine im Wesentlichen elliptische oder rechtwinklige Öffnung aufweist.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. For example, the front handle may represent a frame having a substantially elliptical or rectangular opening.
Vorzugsweise umfassen die Griffe aus Gewichtsgründen Kunststoff. Es kann im Sinne der Erfindung auch bevorzugt sein, dass die Griffe ganz oder teilweise aus Kunststoff gefertigt sind. Vorzugsweise ist der umlaufende vordere Handgriff der Schutzvorrichtung im Wesentlichen ganz oder teilweise hohl ausgebildet. Mit anderen Worten kann der vordere umlaufende Handgriff in seinem Inneren einen oder mehrere Hohlräume umfassen. Dadurch kann vorteilhafterweise der Beitrag des Griffs zum Gesamtgewicht des Werkzeuggeräts weiter reduziert werden. Der hintere Griff der vorgeschlagenen Schutzvorrichtung beinhaltet vorzugsweise eine Schaltvorrichtung, mit der das Werkzeuggerät beispielsweise ein- oder ausgeschaltet werden kann. Es ist im Sinne der Erfindung bevorzugt, dass der hintere Griff beispielsweise zwei Teile umfasst, wobei die beiden Einzelteile des hinteren Griffes insbesondere zueinander korrespondierend ausgebildet sein können. Beispielsweise kann der hintere Griff zweiteilig ausgebildet und/oder in Schalenbauweise aufgebaut sein. Es hat sich überraschenderweise gezeigt, dass die Handgriffe der Schutzvorrichtung durch die Erfindung besonders leicht ausgeführt werden können, so dass insgesamt ein Werkzeuggerät mit einem überraschend geringen Gericht bereitgestellt werden kann.Preferably, the handles comprise plastic for weight reasons. In the context of the invention, it can also be preferred that the handles are made entirely or partially from plastic. Preferably, the circumferential front handle of the protective device is essentially completely or partially hollow. In other words, the front circumferential handle can include one or more cavities inside. As a result, the contribution of the handle to the overall weight of the tool can advantageously be further reduced. 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. For example, 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.
Vorzugsweise wird der vordere Griff um ein Gehäuse des Werkzeuggeräts herumgeführt, so dass dieser zweite Griff der Schutzvorrichtung das Gehäuse und die innenliegenden Bestandteile des Werkzeuggeräts, die im Inneren des Gehäuses angeordnet vorliegen, wirksam schützt. Mit anderen Worten ist es im Sinne der Erfindung bevorzugt, dass der zweite Griff im Wesentlichen ringförmig ausgebildet ist, wobei die ringförmige Struktur des zweiten Griffs dazu eingerichtet ist, einen Übergangsbereich zwischen einem vorderen Bereich und einem hinteren Bereich des Werkzeuggeräts zu umschließen. Die innenliegenden Komponenten werden daher nicht nur durch die Vorsehung des Gehäuses geschützt, sondern auch um den bevorzugt rahmenförmig ausgebildeten zweiten Handgriff der Schutzvorrichtung. Dadurch kann vorteilhafterweise auch das Gehäuse des Werkzeuggeräts leichter bzw. mit einem geringeren Gewicht hergestellt werden, wodurch sich das Gesamtgewicht des bereitzustellenden Werkzeuggeräts vorteilhafterweise weiter verringert. Vorzugsweise kann der zweite Griff in einem inneren unteren Bereich mit dem Schutzrahmen der Schutzvorrichtung verbunden vorliegen.Preferably, 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. In other words, in the sense of the invention, it is preferred that 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. As a result, 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. Preferably, the second handle can be connected to the protective frame of the protective device in an inner lower region.
Die Raumrichtung "unten" ist für den Fachmann im Sinne der Erfindung kein unklarer Begriff, da damit der Bereich unter dem Werkzeuggerät bzw. der untere Bereich des Werkzeuggeräts oder der Schutzvorrichtung gemeint ist. Wenn beispielsweise das Werkzeuggerät auf einem Untergrund oder einem Erdboden abgestellt wird, liegt der untere Bereich des Werkzeuggeräts dem Untergrund oder dem Erdboden zugewandt vor. Das Werkzeuggerät weist vorzugsweise auch eine Oberseite auf, die der Unterseite des Werkzeuggerät gegenüberliegt und bei Verwendung des Geräts dem Nutzer zugewandt ist. Vorzugsweise ist auch die Hinterseite des Werkzeuggeräts dem Nutzer zugewandt, wenn er das Gerät verwendet, während das Arbeitsmittel des Werkzeuggeräts auf der Seite des Werkzeuggeräts angebracht ist, die dem Nutzer bei Betrieb des Geräts abgewandt ist.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. For example, if the tool is placed on a surface or a ground, 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. Preferably, 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.
Es ist im Sinne der Erfindung bevorzugt, dass der Schutzrahmen eine doppel-L-förmigen Struktur aufweist, die dazu eingerichtet ist, eine Unterseite des Werkzeuggeräts zu umgeben. Vorzugsweise kann die doppel-L-förmige Struktur Teil eines U-Profils sein, das insbesondere versteift ausgebildet sein kann. Der Schutzrahmen weist in der Seitenansicht vorzugsweise eine L-Form auf, wobei die längere Seite des Buchstaben "L" die Unterseite des Schutzrahmens bzw. der Schutzvorrichtung darstellt. Vorzugsweise umfasst der Schutzrahmen zwei L-förmige Seitenteile, die in einem oberen, hinteren Bereich und einem vorderen, unteren Bereich jeweils mit einem Verbindungsteilen verbunden vorliegen. Diese Verbindungsteile werden vorzugsweise auch als Verbindungsabschnitte bezeichnet. Es ist im Sinne der Erfindung bevorzugt, dass die Verbindungsteile jeweils im Wesentlichen orthogonal ausgebildet sind, zu den jeweiligen Seiten des Buchstaben "L", die zusammen die bevorzugt L-förmigen Seitenteile des Schutzrahmens bilden. Somit kann der Verbindungsabschnitt, der im hinteren Bereich des Schutzrahmens die Seitenteile miteinander verbindet, als oberer, hinterer Verbindungsabschnitt bezeichnet werden, während der Verbindungsabschnitt, der im Verbindungsbereich zwischen vorderem Griff und Schutzrahmen angeordnet ist, als vorderer, unterer Verbindungsabschnitt bezeichnet werden. Vorzugsweise umfasst der Schutzrahmen somit zwei bevorzugt L-förmige Seitenteile, die mit zwei Verbindungsabschnitten miteinander verbunden sind.For the purposes of the invention, it is preferred that the protective frame has a double-L-shaped structure which is designed to surround an underside of the tool. Preferably 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. For the purposes of the invention, it is preferred that 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. Thus, 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, while 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. Preferably, the protective frame thus comprises two preferably L-shaped side parts, which are connected to one another with two connecting sections.
Die kürzere Seite des Buchstaben "L" bildet vorzugsweise die Rück- oder Hinterseite des Schutzrahmens. Im vorderen Bereich der längeren, unteren Seite ist der Schutzrahmen vorzugsweise mit dem zweiten Griff der Schutzvorrichtung verbunden, wobei der zweite Griff und der untere Bereich des Schutzrahmens vorzugsweise im Wesentlichen orthogonal, d.h. senkrecht zueinander angeordnet sind. Der zweite Griff und die kürzere Seite des bevorzugt L-förmigen Schutzrahmens sind vorzugsweise im Wesentlichen parallel zueinander ausgebildet. Im oberen Bereich der kürzeren Seite des bevorzugt L-förmigen Schutzrahmens ist der Schutzrahmen vorzugsweise mit dem ersten Griff der Schutzvorrichtung verbunden.The shorter side of the letter "L" preferably forms the back or rear side of the protective frame. In the front area of the longer, lower side, 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. In the upper region of the shorter side of the preferably L-shaped protective frame, the protective frame is preferably connected to the first handle of the protective device.
Der erste Griff wird vorzugsweise von einem Bügel gebildet, der den hinteren Bereich des Schutzrahmens mit dem Gehäuse des Werkzeuggeräts verbindet. Es ist im Sinne der Erfindung bevorzugt, dass die Griffe der Schutzvorrichtung zusammen mit dem Schutzrahmen ein stabiles, außenliegendes Skelett bilden, das vorzugsweise auch als Außenskelett für das Werkzeuggerät bezeichnet werden kann. Vorteilhafterweise kann das Außenskelett dazu eingerichtet sein, über die Dämpfelemente das innere Werkzeuggerät aufzunehmen. Der hintere Griff der vorgeschlagenen Schutzvorrichtung kann in einem hinteren Bereich so ausgebildet sein, dass der hintere Griff hakenförmig den oberen, hinteren Verbindungsabschnitt des Schutzrahmens umgreift. Dadurch kann in diesem Bereich der Schutzvorrichtung eine Verbindung bzw. eine Befestigung zwischen dem Schutzrahmen und dem hinteren Griff gebildet werden. Es ist im Sinne der Erfindung bevorzugt, dass in diesem Verbindungsbereich ein Dämpfungselement zwischen der Schutzvorrichtung und dem Werkzeuggerät vorgesehen ist, wobei dieses Dämpfelement vorzugsweise den dritten Entkopplungsbereich der Erfindung bildet.The first handle is preferably formed by a bracket which connects the rear area of the protective frame to the housing of the tool. For the purposes of the invention, it is preferred that 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. Advantageously, 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. As a result, a connection or attachment can be formed between the protective frame and the rear handle in this area of the protective device. It is in the spirit of the invention It is preferred that 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.
Vorzugsweise kann das Werkzeuggerät mit dem bevorzugt bügelförmig ausgebildeten hinteren Griff getragen werden, wenn das Gerät von einem Ort zu einem anderen Ort transportiert werden soll. Alternativ kann dazu auch der obere Bereich des vorderen Griffs verwendet werden. Es ist im Sinne der Erfindung bevorzugt, dass der erste Griff Bedienelemente zur Bedienung des Werkzeuggeräts umfasst. Mit anderen Worten können auch Bedienelemente zur Bedienung bzw. Steuerung des Werkzeuggeräts in dem hinteren Griff der Schutzvorrichtung vorgesehen sein.Preferably, 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. Alternatively, the upper area of the front handle can also be used. For the purposes of the invention, it is preferred that the first handle comprises operating elements for operating the tool device. In other words, operating elements for operating or controlling the tool device can also be provided in the rear handle of the protective device.
Es ist im Sinne der Erfindung ganz besonders bevorzugt, dass der der erste Griff, der zweite Griff und der Schutzrahmen zusammen eine rahmenförmige Vorrichtung bilden, die den kompakten, hinteren Bereich des Werkzeuggeräts umgibt. Vorzugsweise stellt die Schutzvorrichtung eine rahmenförmige Vorrichtung dar, mit der das Werkzeuggerät umgeben werden kann, um es zu schützen. Das Werkzeuggerät liegt vorzugsweise in dem offenen Innenbereich der Schutzvorrichtung angeordnet vor. Es ist im Sinne der Erfindung bevorzugt, dass die Bestandteile der Schutzvorrichtung jeweils einen Abstand zu dem zu schützenden hinteren Bereich des Werkzeuggeräts aufweisen. Mit anderen Worten weist die Schutzvorrichtung nur einige wenige Berührungspunkte mit dem Werkzeuggerät auf, so dass ein Übergang von Schwingungen und Vibrationen vom Werkzeuggerät auf die Schutzvorrichtung nur an diesen wenigen Berührungspunkten erfolgen kann. Die Schutzvorrichtung weist an diesen Berührungspunkten mit dem Werkzeuggerät Dämpfungselemente auf, die eine Übertragung von Vibrationen und Oszillationen, die beispielsweise bei Betrieb des Werkzeuggeräts entstehen, auf die Schutzvorrichtung besonders wirksam verhindern. Beispielsweise kann eine Befestigung des Werkzeuggeräts an der Schutzvorrichtung an beispielsweise drei bis fünf Punkten vorgesehen sein, wobei auch mehr oder weniger Berührungspunkte vorgesehen sein können. Vorzugsweise erfolgt die Befestigung des Werkzeuggeräts in der Schutzvorrichtung mit Dämpfungselementen in den Berührungspunkten zwischen den Bestandteilen der Schutzvorrichtung und dem Werkzeuggerät. Es ist im Sinne der Erfindung bevorzugt, die Begriffe "Dämpfelement" und "Dämpfungselement" synonym zu verwenden.In the context of the invention, it is particularly preferred that 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. Preferably, 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. For the purposes of the invention, it is preferred that the components of the protective device are each at a distance from the rear area of the tool device to be protected. In other words, 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. For example, 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. For the purposes of the invention, it is preferred to use the terms “damping element” and “damping element” synonymously.
Beispielsweise kann der Schutzrahmen mit ein oder zwei Dämpfungselementen an einer Unterseite des Werkzeuggeräts befestigt werden. Auf der Oberseite kann das Werkzeuggerät beispielsweise mit zwei weiteren Dämpfelementen an dem hinteren Griff, der vorzugsweise als bügelförmiger Halter ausgebildet ist, befestigt werden. Ein weiteres Dämpfungselement kann im Verbindungsbereich zwischen Schutzrahmen und hinterem Griff der Schutzvorrichtung vorgesehen sein. Durch die Vorsehung der Dämpfungselemente an den Berührungspunkten kann das Werkzeuggerät vibrationstechnisch von der Schutzvorrichtung entkoppelt werden, so dass vorteilhafterwiese keine unerwünschten Vibrationen, die bei der Arbeit mit dem Werkzeuggerät entstehen können, auf den Nutzer und seine Gelenke übertragen werden. Darüber hinaus kann der hintere Bereich des Werkzeuggeräts so von der Schutzvorrichtung umgeben werden, dass vor allem die Hauptkomponenten des Werkzeuggeräts, wie Getriebe, Motor und Akkus, bei einem Sturz optimal vor mechanischen Schäden geschützt werden.For example, 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. By providing the damping elements at the points of contact, the tool device can be decoupled from the protective device in terms of vibrations, so that advantageously no unwanted vibrations that can arise when working with the tool device are transmitted to the user and his joints. In addition, the rear area of the tool can be surrounded by the protective device in such a way that the main components of the tool, such as the gearbox, motor and batteries, are optimally protected from mechanical damage in the event of a fall.
Neben den Dämpfelementen können zusätzliche Anschlagdämpfer die Robustheit bei einem Sturz zu erhöhen. Mit anderen Worten ist es im Sinne der Erfindung bevorzugt, dass die Schutzvorrichtung Anschlagsdämpfer zur Steigerung der Robustheit des Werkzeuggeräts umfasst. Insbesondere können die Anschlagsdämpfer ein elastisches Material umfassen oder ganz oder teilweise aus diesem gebildet sein. Beispielsweise sind die Anschlagsdämpfer aus Gummi gebildet. Sie können insbesondere an definierten robusten Kontaktstelen zwischen Werkzeuggerät und Schutzvorrichtung untergebracht sein. Die Anschlagsdämpfer können beispielsweise entweder in der Schutzvorrichtung oder im Werkzeuggerät untergebracht sein. Dabei kann es von Vorteil sein diese in der Nähe der Dämpfelemente anzubringen.In addition to the damping elements, additional shock absorbers can increase robustness in the event of a fall. In other words, in the sense of the invention, it is preferred that the protective device includes stop dampers to increase the robustness of the tool. In particular, the stop dampers can comprise an elastic material or be formed entirely or partially from it. For example, 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.
In einem zweiten Aspekt betrifft die Erfindung ein System, das eine Schutzvorrichtung und ein Werkzeuggerät umfasst, wobei das Werkzeuggerät einen Motor, ein Getriebe und mindestens einen Akkumulator als Hauptkomponenten umfasst. Das System ist dadurch gekennzeichnet, dass das Werkzeuggerät so in die Schutzvorrichtung eingebracht werden kann, dass die Schutzvorrichtung das Werkzeuggerät umgibt, wobei eine Verbindung zwischen Werkzeuggerät und Schutzvorrichtung durch eine Anzahl von Berührungspunkten hergestellt werden kann, wobei an diesen Berührungspunkten zwischen Werkzeuggerät und Schutzvorrichtung Dämpfelemente vorgesehen sind. Die für die Schutzvorrichtung genannten Definitionen, technischen Wirkungen und Vorteile gelten für das System analog.In a second aspect, the invention 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.
In den Figuren sind gleiche und gleichartige Komponenten mit gleichen Bezugszeichen beziffert. Es zeigen:
- Fig. 1
- Darstellung einiger Bestandteile einer bevorzugten Ausführungsform der Erfindung
- Fig. 2
- Darstellung der Bestandteile einer bevorzugten Ausführungsform der Schutzvorrichtung mit Dämpfungselementen aus einem elastischen Material, zum Beispiel Gummi.
- Fig. 3
- Darstellung einer bevorzugten Ausführungsform der Schutzvorrichtung mit Dämpfungselementen, die Federn, zum Beispiel Zylinderdruckfedern, umfassen.
- Fig. 4
- Darstellung einer bevorzugten Ausführungsform der Schutzvorrichtung mit Anschlagsdämpfern
- Fig. 5
- Darstellung einer bevorzugten Ausführungsform des vorgeschlagenen Systems
- Fig. 6
- Darstellung der Entkopplungsbereiche einer bevorzugten Ausführungsform der Erfindung
- Fig. 7
- Darstellung einer bevorzugten Ausführungsform der Schutzvorrichtung mit konkret bezeichneten Dämpfungselementen
- Fig. 1
- Representation of some components of a preferred embodiment of the invention
- Fig. 2
- Representation of the components of a preferred embodiment of the protective device with damping elements made of an elastic material, for example rubber.
- Fig. 3
- Representation of a preferred embodiment of the protective device with damping elements that include springs, for example cylinder compression springs.
- Fig. 4
- Representation of a preferred embodiment of the protective device with stop dampers
- Fig. 5
- Representation of a preferred embodiment of the proposed system
- Fig. 6
- Representation of the decoupling areas of a preferred embodiment of the invention
- Fig. 7
- Representation of a preferred embodiment of the protective device with specifically designated damping elements
Die rahmenförmige Struktur umgibt insbesondere den hinteren Teil (13) des Werkzeuggeräts (2), wobei insbesondere in dem hinteren Bereich (13) des Werkzeuggeräts (2) die Hauptkomponenten (9, 10, 11) des Werkzeuggeräts (2) vorliegen. Dabei handelt es sich insbesondere um den Motor (9), das Getriebe (10) und den mindestens einen Akkumulator (11) des Werkzeuggeräts (2). Vorzugsweise handelt es sich bei dem Werkzeuggerät (2) um einen akkubetriebenen Trennschleifer, der insbesondere mit Trennscheiben betrieben wird, die einen Durchmesser von 300 mm oder größer aufweisen. Durch die vibrationstechnische Entkopplung von Werkzeuggerät (2) und Schutzvorrichtung (1) kann vorteilhafterweise ein besonders einfacher, kompakter und robuster Aufbau des Werkzeuggeräts (2) ermöglicht werden, wobei das Gerät (2) dennoch ein geringes Gesamtgewicht aufweisen und mit einer minimalen Übertragung von Hand-Arm-Vibrationen auf den Nutzer betrieben werden kann. Insbesondere ermöglicht die Erfindung eine Funktionsaufteilung der einzelnen Komponenten der Schutzvorrichtung (1) und des Werkzeuggeräts (2), so dass die System-Komponenten, wie Akkumulator (11), Motor (9), Getriebe (10), Trennscheibe (14), Dämpfelemente (6) und/oder Handgriffe (3, 4) für ihre jeweilige Aufgabe optimiert werden können. Ein weiterer Vorteil der Erfindung besteht darin, dass durch die Bereitstellung einer funktionellen Einheit (13) des Werkzeuggeräts (2) mit den Hauptkomponenten (9, 10, 11) auf der einen Seite und der Bereitstellung der vorzugsweise entkoppelten Schutzvorrichtung (1) mit integrierten Handgriffen (3, 4) auf der anderen Seite eine einfache Montage des vorgeschlagenen Systems ermöglicht werden kann.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. Through the vibration-related decoupling of tool equipment (2) and protective device (1) can advantageously enable a particularly simple, compact and robust construction of the tool device (2), whereby the device (2) still has a low overall weight and with a minimal transmission of hand-arm vibrations to the user can be operated. In particular, 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.
In der schrägen Seitenansicht der
Das in
Die Lage bzw. Anordnung der Entkopplungsbereiche (8) der vorliegenden Erfindung wird insbesondere in
Es ist im Sinne der Erfindung insbesondere bevorzugt, dass das Werkzeuggerät (2) mindestens einen Akkumulatur (11) zur Versorgung des Werkzeuggeräts (2) mit elektrischer Energie aufweist. Insofern kann die Schutzvorrichtung (1) vorzugsweise auch als Vorrichtung (1) zum Schutz eines Akkumulators (11) in einem Werkzeuggerät (2) bezeichnet werden. Dabei kann die Schutzvorrichtung (1) das Werkzeuggerät (2) zum Schutz des Akkus (11) umgreifen und außen an dem Werkzeuggerät (2) vorliegen. Zusätzlich zu den bisher genannten Dämpfungselementen (6) kann das Werkzeuggerät (2) weitere Dämpfungselemente umfassen, die ein elastisches Material, vorzugsweise Gummi, umfassen können. Diese zusätzlichen Dämpfungselemente am Werkzeuggerät (2) sind vorzugsweise dazu eingerichtet, die Schutzvorrichtung (1) und/oder das Werkzeuggerät (2) bzw. seinen Akku (11) bei Stürzen zusätzlich zu schützen. Es ist im Sinne der Erfindung bevorzugt, dass die Schutzvorrichtung (1) im Wesentlichen drei Bestandteile umfasst, insbesondere den ersten Handgriff (3), den zweiten Handgriff (4) und den Schutzrahmen (5). Diese Bestandteile (3, 4, 5) sind vorzugsweise so miteinander verbunden, dass sie an drei Bereichen Kontakt miteinander haben und sogenannte Entkopplungsbereiche (8a, 8b, 8c) bilden. Die Bestandteile (3, 4, 5) der Schutzvorrichtung (1) bilden insbesondere eine stabile Einheit, um den Akkumulator (11) des Werkzeuggeräts (2) zu schützen. Vorzugsweise kann es sich bei dem Motor (9) des Werkzeuggeräts (2) insbesondere um einen elektrischen Motor handeln, der von dem mindestens einen Akku (11) des Werkzeuggeräts (2) mit elektrischer Energie versorgt wird.In the context of the invention, it is particularly preferred that the tool device (2) has at least one accumulator (11) for supplying the tool device (2) with electrical energy. In this respect, 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). In addition to the damping elements (6) mentioned so far, 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. For the purposes of the invention, it is preferred that 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). Preferably, 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).
- 11
- SchutzvorrichtungProtective device
- 22
- Werkzeuggerättool device
- 33
- erster Griff / hinterer Grifffirst handle / back handle
- 44
- zweiter Griff / vorderer Griffsecond handle / front handle
- 55
- SchutzrahmenProtective frame
- 66
- DämpfelementeDamping elements
- 77
- Berührungspunktepoints of contact
- 88th
- EntkopplungsbereicheDecoupling areas
- 99
- Motor des WerkzeuggerätsMotor of the tool device
- 1010
- Getriebe des WerkzeuggerätsGearbox of the tool device
- 1111
- Akkumulatoren des WerkzeuggerätsAccumulators of the tool device
- 1212
- vorderer Teil des Werkzeuggerätsfront part of the tool device
- 1313
- hinterer Teil des Werkzeuggerätsrear part of the tool device
- 1414
- Arbeitsmittel, zum Beispiel TrennscheibeWork equipment, for example cutting disc
- 1515
- AnschlagsdämpferShock absorber
Claims (9)
- Protective device (1) for protecting a rechargeable battery (11) in a power tool (2), the power tool (2) comprising a motor (9), a gear unit (10) and at least one rechargeable battery (11) as main components,
characterized in that
the protective device (1) is configured as a protective frame (5), it being possible for the power tool (2) to be introduced into the protective device (1) in such a way that the protective device (1) surrounds the power tool (2), it being possible for a connection to be established between the power tool (2) and the protective device (1) by way of a number of contact points (7), damping elements (6) being provided at these contact points (7) between the power tool (2) and the protective device (1). - Protective device (1) according to Claim 1,
characterized in that
the protective device (1) comprises from two to ten damping elements (6) and particularly preferably from three to five damping elements (6). - Protective device (1) according to Claim 1 or 2,
characterized in that
the damping elements (6) form decoupling regions (8), the decoupling regions (8) each comprising one damping element (6) or two damping elements (6). - Protective device (1) according to one of the preceding claims,
characterized in that
the protective device (1) comprises a first handle (3) and a second handle (3), and damping elements (6). - Protective device (1) according to Claim 1 or 4,
characterized in that
the protective frame (5) has a double-L-shaped structure which is configured to surround a lower side of the power tool (2). - Protective device (1) according to Claim 1, 4 or 5,
characterized in that
the first handle (3) comprises operating elements for operating the power tool. - Protective device (1) according to one of Claims 4 to 6,
characterized in that
the second handle (4) is of substantially annular configuration, the annular structure of the second handle (4) being configured to enclose a transition region between a front region (12) and a rear region (13) of the power tool (2). - Protective device (1) according to one of the preceding claims,
characterized in that
the protective device (1) comprises stop dampers (15). - System comprising a protective device (1) according to one of the preceding claims and a power tool (2), the power tool (2) comprising a motor (9), a gear unit (10) and at least one rechargeable battery (11) as main components,
characterized in that
the protective device (1) is configured as a protective frame (5), it being possible for the power tool (2) to be introduced into the protective device (1) in such a way that the protective device (1) surrounds the main components (9, 10, 11) of the power tool (2), it being possible for a connection to be established between the power tool (2) and the protective device (1) by way of a number of contact points (7), damping elements (5) being provided at these contact points (7) between the power tool (2) and the protective device (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19171534.1A EP3733352A1 (en) | 2019-04-29 | 2019-04-29 | Protective device for a tool and system comprising a protective device and a tool |
PCT/EP2019/085668 WO2020221471A1 (en) | 2019-04-29 | 2019-12-17 | Protective device for a tool apparatus, and system comprising a protective device and a tool apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3962699A1 EP3962699A1 (en) | 2022-03-09 |
EP3962699B1 true EP3962699B1 (en) | 2024-03-13 |
Family
ID=66323725
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19171534.1A Withdrawn EP3733352A1 (en) | 2019-04-29 | 2019-04-29 | Protective device for a tool and system comprising a protective device and a tool |
EP19818139.8A Active EP3962699B1 (en) | 2019-04-29 | 2019-12-17 | Protective device for a tool and system comprising a protective device and a tool |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19171534.1A Withdrawn EP3733352A1 (en) | 2019-04-29 | 2019-04-29 | Protective device for a tool and system comprising a protective device and a tool |
Country Status (4)
Country | Link |
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US (1) | US20220176511A1 (en) |
EP (2) | EP3733352A1 (en) |
CN (1) | CN113613845A (en) |
WO (1) | WO2020221471A1 (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
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EP4008478A1 (en) * | 2020-12-04 | 2022-06-08 | Hilti Aktiengesellschaft | Machine tool with a first and a second battery |
EP4008491A1 (en) * | 2020-12-04 | 2022-06-08 | Hilti Aktiengesellschaft | Machine tool with a first handle, a second handle and a main body |
EP4008477A1 (en) * | 2020-12-04 | 2022-06-08 | Hilti Aktiengesellschaft | Machine tool with air cooling and method for cooling components of a machine tool |
CA3156645A1 (en) * | 2021-04-28 | 2022-10-28 | Gripguard Inc. | Power tool fall protection device |
CN115592622A (en) * | 2021-07-08 | 2023-01-13 | 南京泉峰科技有限公司(Cn) | Electric tool |
EP4289562A1 (en) * | 2022-06-07 | 2023-12-13 | Hilti Aktiengesellschaft | Machine tool with parallel output and motor axes |
CN118061137A (en) * | 2022-11-24 | 2024-05-24 | 喜利得股份公司 | Hand-held electric tool |
DE102023119516A1 (en) | 2023-03-31 | 2024-10-02 | Andreas Stihl Ag & Co. Kg | Hand-held, portable tool |
Family Cites Families (20)
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US3152650A (en) * | 1962-05-15 | 1964-10-13 | R E Anderson | Handle frame for portable power tool |
EP0837757B1 (en) * | 1995-07-13 | 2001-10-17 | Atlas Copco Berema Aktiebolag | Handle means for percussive hand held machines |
DE10260466B4 (en) * | 2002-12-21 | 2014-07-03 | Andreas Stihl Ag & Co. Kg | Hand-held implement |
ATE336162T1 (en) * | 2003-08-04 | 2006-09-15 | Black & Decker Inc | HANDLE ARRANGEMENT FOR A POWER TOOL |
DE102004056919A1 (en) * | 2004-11-25 | 2006-06-01 | Andreas Stihl Ag & Co. Kg | Hand-held implement |
DE202005011592U1 (en) * | 2005-07-23 | 2006-11-23 | Dolmar Gmbh | Power cutter has drive unit spaced from handle unit with distance detector mounted in the gap inbetween to monitor relative movement and throttle or switch off power via control device when too much pressure is applied by user |
WO2007069946A1 (en) * | 2005-12-14 | 2007-06-21 | Husqvarna Ab | Handheld working machine |
DE102006000375A1 (en) * | 2006-07-27 | 2008-01-31 | Hilti Ag | Hand tool with decoupling arrangement |
EP2080594B1 (en) * | 2008-01-21 | 2013-04-03 | Makita Corporation | Power tool and protector for power tool |
DE202009006860U1 (en) * | 2009-05-12 | 2010-09-30 | Makita Corp., Anjo | baseplate |
JP5457886B2 (en) * | 2010-03-03 | 2014-04-02 | 株式会社マキタ | Engine cutter |
JP5598213B2 (en) * | 2010-09-29 | 2014-10-01 | 日立工機株式会社 | Portable work machine |
DE102013012513A1 (en) * | 2013-07-27 | 2015-01-29 | Andreas Stihl Ag & Co. Kg | "Hand-guided implement" |
WO2015066759A1 (en) * | 2013-11-11 | 2015-05-14 | 3 Of Us Pty Ltd | Protective tool cover |
US11338426B2 (en) * | 2015-11-02 | 2022-05-24 | Black & Decker, Inc. | Cordless power cutter |
EP3173189A1 (en) * | 2015-11-25 | 2017-05-31 | HILTI Aktiengesellschaft | Portable, hand held cutting-off machine |
CN205304562U (en) * | 2015-12-31 | 2016-06-08 | 歌尔声学股份有限公司 | Linear vibrating motor |
DE102016210233A1 (en) * | 2016-06-09 | 2017-12-14 | Homag Gmbh | Processing device with a vibration damping device and method |
US20180147713A1 (en) * | 2016-11-30 | 2018-05-31 | Ridge Tool Company | Hybrid power tools |
EP4008478A1 (en) * | 2020-12-04 | 2022-06-08 | Hilti Aktiengesellschaft | Machine tool with a first and a second battery |
-
2019
- 2019-04-29 EP EP19171534.1A patent/EP3733352A1/en not_active Withdrawn
- 2019-12-17 WO PCT/EP2019/085668 patent/WO2020221471A1/en unknown
- 2019-12-17 CN CN201980094130.7A patent/CN113613845A/en active Pending
- 2019-12-17 EP EP19818139.8A patent/EP3962699B1/en active Active
- 2019-12-17 US US17/601,826 patent/US20220176511A1/en active Pending
Also Published As
Publication number | Publication date |
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EP3962699A1 (en) | 2022-03-09 |
EP3733352A1 (en) | 2020-11-04 |
US20220176511A1 (en) | 2022-06-09 |
CN113613845A (en) | 2021-11-05 |
WO2020221471A1 (en) | 2020-11-05 |
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