EP4255672B1 - Machine-outil doté d'un premier et d'un second accumulateur - Google Patents

Machine-outil doté d'un premier et d'un second accumulateur

Info

Publication number
EP4255672B1
EP4255672B1 EP21814766.8A EP21814766A EP4255672B1 EP 4255672 B1 EP4255672 B1 EP 4255672B1 EP 21814766 A EP21814766 A EP 21814766A EP 4255672 B1 EP4255672 B1 EP 4255672B1
Authority
EP
European Patent Office
Prior art keywords
power tool
machine tool
main body
tool
housing
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.)
Active
Application number
EP21814766.8A
Other languages
German (de)
English (en)
Other versions
EP4255672A1 (fr
Inventor
Ralf Greitmann
Roland Meuer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP4255672A1 publication Critical patent/EP4255672A1/fr
Application granted granted Critical
Publication of EP4255672B1 publication Critical patent/EP4255672B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/006—Vibration damping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the present invention relates to a machine tool according to the preamble of claim 1, as shown in EP 3 733 352 A1
  • the machine tool has a first accumulator and a second accumulator as energy sources, and comprises a main body and a motor.
  • the machine tool is characterized in particular by the fact that the main body has a first receiving space for receiving the first accumulator and a second receiving space for receiving the second accumulator, the receiving spaces being arranged within a housing of the main body such that the accumulators are accessible and replaceable from a rear of the main body, and the receiving spaces for the accumulators forming a lower termination of the main body of the machine tool.
  • cut-off grinders or angle grinders are well-known, used to make cuts in a substrate or to process the surface of a substrate.
  • Such cut-off grinders or angle grinders typically have a disc-shaped tool, known as a cutting or grinding wheel.
  • the batteries and battery interface should also be protected from metal shavings, sparks, and dust. Furthermore, it is advantageous to protect the batteries, their interface, and especially the battery contacts from environmental influences such as rain and moisture.
  • the battery is located in an upper area of the main body of the machine tool. While this may offer some protection to the machine tool during cutting, it provides little or no protection to the machine tool and its internal components against weather conditions such as rain or dirty water, which can occur when operating an angle grinder in wet cutting mode.
  • the object of the present invention is to overcome the aforementioned shortcomings and disadvantages of the prior art and to provide a machine tool in which the accumulators and their contacts, interfaces, displays, and operating elements are optimally protected against mechanical damage, for example, from being dropped, or against weather conditions such as humidity, rain, or moisture. Furthermore, the accumulators should remain easily accessible and replaceable despite the optimized protection. In this context, experts would welcome the possibility of ensuring optimal accumulator protection without the need for additional flaps or covers on the machine tool. Moreover, the design of the machine tool and the arrangement of its components should be optimized. The machine tool should be as simple, compact and robust as possible, and the machine tool should have good ergonomics.
  • a machine tool is provided with a first accumulator and a second accumulator as energy sources.
  • the machine tool also comprises a main body and a motor.
  • the machine tool is characterized in particular by the fact that the main body has a first receiving compartment for receiving the first accumulator and a second receiving compartment for receiving the second accumulator, wherein the receiving compartments are arranged within a housing of the main body such that the accumulators are accessible and replaceable from a rear side of the main body, and wherein the receiving compartments for the accumulators form a lower termination of the main body of the machine tool.
  • the batteries can be used as energy sources. Batteries with, for example, a comparatively large volume and high capacity can be used. However, it is equally preferred that smaller batteries with a lower capacity are used.
  • the first and second batteries can be of the same type.
  • different types of batteries can be used as energy sources.
  • the batteries used are configured to operate with the same interface on the machine tool. In other words, the machine tool can have interfaces and/or have contact surfaces that can interact with different types of batteries. This can be achieved, for example, by ensuring that the batteries used as a power source in the proposed machine tool have interfaces and/or contact surfaces that correspond to the interfaces and contact surfaces of the machine tool.
  • the battery capacity can, for example, range from 3 to 15 ampere-hours (Ah), and their volume, depending on the capacity, from 700 to 1,500 cm3 .
  • the invention specifically proposes an arrangement of components for a preferably handheld, battery-operated cut-off saw with multiple batteries, preferably two batteries.
  • the position of the batteries and the battery interface is preferably selected such that the batteries are optimally protected against dust, metal shavings, sparks, or mud during cutting. Tests have shown that the batteries, their interface, and their contacts can be particularly effectively protected against environmental influences such as rain or moisture by the invention or the proposed arrangement.
  • the arrangement of the other components of the power tool is preferably adapted to the position of the batteries.
  • the proposed arrangement is optimized, particularly with regard to robustness, compactness, ergonomics, and ease of assembly.
  • the batteries are easily accessible, allowing for quick and simple replacement when necessary.
  • the battery charge level indicator is easily visible to the user, ensuring they are always aware of the current charge level during operation. This allows the user to effectively manage and plan their work with the cut-off saw.
  • the receiving compartments for the accumulators are arranged side by side. Preferably, they are similar to each other or identical in construction. It is preferred, according to the invention, that the two receiving compartments for the two accumulators are arranged axially symmetrically about a conceptual longitudinal axis running centrally through the machine tool. In other words, the receiving compartments can be arranged on a right and on a left side of the virtual longitudinal axis of the machine tool. This allows the structure of the machine tool within its main body to be optimized. It should be kept simple and compact. Furthermore, the compact design increases the robustness of the proposed machine tool.
  • the invention with the proposed arrangement of the batteries in two compartments, preferably arranged side by side so that the batteries are particularly easily accessible from the rear of the main body, advantageously enables an optimized, simple design for a battery-powered cut-off saw, in which changing the batteries is particularly easy. Furthermore, good protection of the batteries and their interface during operation of the tool can be ensured, as well as good protection against environmental influences such as rain or moisture.
  • the proposed design of the tool in which the battery compartments are located in a lower, rear area of the main body, represents a robust and simple device design and also allows for good visibility of the battery charge level indicator.
  • the machine tool is an angle grinder.
  • the angle grinder can comprise a rear section, which is formed, for example, by a main body and a protective frame.
  • the main body of the angle grinder can be enclosed in a housing and may include a control unit, a drive or drive train, and/or a motor.
  • the protective frame can comprise a front, circumferential handle and a second, upper handle.
  • the front part of the machine tool is formed by its tool, which, particularly in the case that the machine tool is designed as an angle grinder, is a disc-shaped tool. It can, in particular, be referred to as a cutting disc.
  • the spatial directions “front” and “back” are defined by the front section of the machine tool formed by the tool and by the rear section of the machine tool formed, among other things, by the main body.
  • the spatial areas “top” and “bottom” or the “top” and “bottom” of the machine tool are preferably defined by the upper handle (“top”), which in the sense of the invention is preferably also referred to as the second handle, and by the protective frame, the underside of which preferably runs on the underside of the machine tool.
  • the machine tool comprises a first, circumferential handle, a second, upper handle, and a protective frame for protecting the main body of the machine tool. Details of these components of the machine tool can be seen in particular in the figures.
  • the first, circumferential handle The handle preferably extends along the transition between the front and rear sections of the machine tool and is typically gripped by the left hand of a right-handed user when operating the machine tool. Therefore, the first, circumferential handle can also be used for transporting the machine tool. Due to its circumferential design, the first handle provides effective impact protection against impacts on the sides of the machine tool, particularly if the machine tool were to land on its right or left side if dropped.
  • the circumferential design of the first handle protects, in particular, the components of the machine tool located in its main body, such as the motor, drive, or gearbox, but also the batteries. It is preferred, according to the invention, that the plane in which the first handle predominantly runs is essentially orthogonal to a longitudinal axis of the machine tool. This longitudinal axis, which can be conceptually placed through the machine tool, runs centrally through the device and extends from the front section of the machine tool towards its rear section. In accordance with the invention, it is preferred that the plane in which the first handle predominantly runs is essentially perpendicular to the longitudinal axis of the machine tool.
  • the second, upper handle preferably runs substantially parallel to the virtual longitudinal axis of the machine tool.
  • a right-handed person typically grips this second handle with their right hand when using the machine tool.
  • the upper handle projects beyond the main body of the machine tool in a rearward direction, so that the main body and its internal components are well protected against the machine tool being dropped and landing on its rear side.
  • the projection of the second handle beyond the rear of the main body of the machine tool preferably forms a projection.
  • the term "projection" preferably describes the distance between a substantially vertical rear wall of the main body of the machine tool and the furthest point on the rear of the upper handle. This distance or projection is, for example, in the range of 1 to 12 cm, preferably 3 to 9 cm, and particularly preferably approximately 6 cm.
  • the second handle is arranged above the electronics of the machine tool and includes operating switches for the machine tool on its upper and/or lower surface. Since the second handle of the machine tool is usually gripped by the user's right hand, the The machine tool can be operated particularly well by providing operating switches on the top and/or bottom of the second handle.
  • the preferred spatial proximity between the machine tool's electronics and the at least one operating switch in the second handle significantly shortens the transmission paths for control commands and simplifies or reduces the wiring and circuitry effort within the device. It is preferred, according to the invention, that the area of the second handle containing the at least one operating switch is designated as the central section of the upper handle.
  • a longitudinal axis running centrally through the central section preferably does not run parallel to a surface on which the machine tool can be placed, but is inclined at an angle of 10 to 30 degrees, preferably at an angle of 15 to 25 degrees, and most preferably at an angle of approximately 20 degrees.
  • This inclination significantly improves the ergonomics of the upper handle.
  • the central section of the upper handle is essentially perpendicular to a rear section of the upper handle.
  • the rear section of the upper handle is also inclined at the aforementioned angle of approximately 20 degrees relative to the essentially vertical rear wall of the main body of the machine tool. Tests have shown that the inclination of the second handle of the machine tool significantly improves the ergonomics of the machine tool.
  • the proposed machine tool comprises a protective frame, the underside of which preferably runs along the underside of the machine tool.
  • the protective frame has an L-shaped structure, particularly in a side view of the machine tool.
  • the lower bar of the "L” runs along the underside of the machine tool
  • the vertically upward-projecting bar of the preferably laterally inverted "L” runs along the substantially vertical rear wall of the main body of the machine tool.
  • Such a simple L-structure is preferably present on both the right and left sides of the machine tool, so that, according to the invention, the L-shaped structure is preferably also referred to as the "lateral L-shaped structure". It preferably extends around the main body of the machine tool.
  • the two individual L-shaped structures are preferably connected to each other via a connecting web, the connecting web passing through an interior or through-passage space of the upper handle. It is preferred, according to the invention, that the vertically upward-projecting bars of the L-shaped structure of the protective frame form its rear side.
  • the front of the protective frame can preferably also be formed by two vertically upward-projecting beams that are essentially parallel. to the rear, vertically upward-projecting beams of the protective frame.
  • the shape of the protective frame can preferably also be described as U-shaped, wherein the protective frame preferably comprises two U-shaped structures, which can be arranged on a right and on a left side of the machine tool and are connected to each other via the connecting web.
  • the accumulators are arranged in the interior space formed by the U- or L-shaped structures of the protective frame. In other words, the accumulators can be surrounded by the elements of the protective frame, so that the protective frame optimally protects the accumulators against mechanical damage, for example, from a fall. It is preferred, according to the invention, that the accumulators are arranged above the lower beam of the L- or U-shaped structures of the protective frame.
  • the main body of the machine tool is preferably arranged within the protective frame, with the accumulators forming its lower end.
  • the accumulators include contacts with which they can be plugged into the machine tool.
  • the machine tool includes a corresponding connection arrangement with which the contacts of the accumulators can interact.
  • the machine tool includes an interface with which the power supply to the device or the energy output of the accumulators can be controlled.
  • the machine tool includes one interface that controls the energy output of both accumulators.
  • the machine tool includes two interfaces, i.e., one interface for each accumulator.
  • the accumulators can be connected to the electronics of the machine tool via an interface and contacts.
  • the upper surface of the main body housing of the machine tool is inclined to ensure a defined flow of liquid.
  • the upper surface of the main body housing of the machine tool faces the underside of the central part of the upper handle.
  • the upper surface of the machine tool housing is also preferably inclined so that rain, dirt, or splash water can optimally drain downwards from the main body of the machine tool.
  • the main body housing of the machine tool has a rearward inclination. This preferably means, according to the invention, that when... When placing the machine tool on a surface, the front part of the main body housing is positioned further away from the surface than the rear part.
  • the inclination of the main body can be described by an angle of inclination B, which preferably lies between an imaginary ground plane on which the machine tool can be placed and a plane that can be conceptually placed through the surface of the housing or main body of the machine tool.
  • the angle of inclination B is preferably in the range of 5 degrees. Tests have shown that an inclined surface of the housing or main body of the machine tool with an angle of inclination of approximately 5 degrees allows for optimized drainage of rainwater or other water.
  • the housing of the main body of the machine tool also features ribs to ensure controlled fluid drainage. These ribs direct the fluid to the sides, preventing it from entering the rear of the machine tool or the back of the main body, where, for example, battery control switches or a battery charge indicator might be located.
  • the sloped top of the main body housing and/or the presence of the ribs effectively prevent sensitive machine tool components or battery-related parts from coming into contact with moisture, dampness, or rain and potentially being damaged.
  • the proposed machine tool can further be described by an angle of inclination A.
  • This angle of inclination A is preferably formed between an imaginary ground plane on which the machine tool can be placed and a plane that runs centrally through the motor axis and the axis of the cutting disc. According to the invention, it is preferred that this angle of inclination A lies in a range between 10 and 30 degrees, preferably in a range between 15 and 25 degrees, and particularly preferably at approximately 20 degrees.
  • the angles of inclination A and B are defined in Fig. 7 depicted.
  • the machine tool does without an additional flap and without an additional cover to protect the batteries from liquid.
  • the machine tool's susceptibility to malfunctions can be significantly reduced.
  • the effort required for battery replacement can be reduced.
  • the number of batteries can be reduced because there is no longer a lid or flap to hold open.
  • charge level indicators can be integrated directly into the batteries, which can also be positioned for optimal user visibility, allowing the operator of the machine tool to quickly and easily monitor the battery charge levels.
  • the batteries or their receiving compartments in the proposed machine tool are arranged in the housing of the main body of the machine tool, the housing forming a sealed space that is particularly well sealed against dust and/or moisture, as well as wetness. This effectively prevents unwanted dust from entering the battery receiving compartment.
  • the batteries and their receiving compartments are located in the housing of the machine tool, particularly in a rear, lower region, i.e., in close proximity to a bottom and a rear side of the housing of the machine tool.
  • the machine tool has damping means to decouple the handles and the protective frame from vibrations that arise during operation of the machine tool.
  • the damping means comprise springs, wherein, in particular, three springs are provided to decouple the handles and the protective frame from the vibrations that arise during operation of the machine tool. Possible mounting locations for the preferably three springs are in Fig. 6 depicted.
  • the motor of the machine tool is aligned centrally, transversely to the accumulators and to the working direction of the machine tool. This places the center of gravity of the machine tool essentially in the center of the motor, so that the load on the rotating, front handle is minimized during operation and when carrying the machine tool.
  • the preferably central arrangement of the motor, whose working axis is preferably perpendicular to a central axis of the machine tool provides a particularly well-balanced machine tool that, despite its weight, is easy to carry and offers good ergonomics during cutting.
  • the machine tool comprises a motor housing, wherein the motor housing includes a gearbox of the machine tool, a cutting arm for a tool of the machine tool, and a means for driving the tool.
  • the means for driving the tool are designed as a belt.
  • the belt which The gearbox and the cutting arm are in Fig. 5 As shown.
  • the means for driving the tool runs at least partially parallel to the cutting arm. This essentially parallel arrangement of the cutting arm with respect to the belt for driving the tool of the machine tool is also shown in Fig. 5 As illustrated.
  • the belt is configured to transmit a rotational movement generated in the motor of the machine tool to the cutting disc of the angle grinder and to drive the cutting disc to the rotational movement with which the cuts can be made in the substrate to be processed.
  • the machine tool includes at least one protective plate on a front face of the housing of the main body of the machine tool for protecting the machine tool and its components.
  • the protective plate forms a lower region of the circumferential first handle, is attached to it, or covers it.
  • the front face of the housing of the main body of the machine tool faces the tool of the machine tool, i.e., preferably the cutting disc. Dust, metal chips, sparks, and/or mud splashes can strike this front face of the main body of the machine tool, and the protective plate prevents them from damaging the machine tool or its main body and its internal components, such as the accumulators.
  • This protective effect is further enhanced by arranging the accumulators in a rear region of the main body, i.e., at a maximum distance from the main point of impact of dust, metal chips, sparks, and/or mud splashes on the front face of the main body of the machine tool. This maximum distance and a possible arrangement of the mudguard are described in Fig. 2 shown.
  • the invention relates to a battery-powered cut-off saw with two batteries accessible from the rear, which are preferably completely covered from above.
  • the housing has optimized edges and/or surfaces for defined water drainage to protect the batteries and their interface.
  • the other components of the cut-off saw are arranged around the batteries in such a way that the tool can be easily assembled and that the device has good ergonomics.
  • the two batteries are well protected from environmental influences from above.
  • This is advantageously achieved by the provided water drainage on the housing, which is made possible in particular by the slope of the top of the main body of the machine tool and/or the provision of ribs on the housing of the main body of the machine tool.
  • a protective plate is provided at the front of the main body of the power tool. Positioning the batteries in a rear, lower area of the main body of the cut-off saw allows good access to the batteries and a clear view of the battery charge level indicator.
  • the invention provides good protection for the battery interface and, in particular, the battery contacts.
  • a central support preferably also referred to as a support unit
  • This support unit is preferably made of plastic or comprises one or more plastics. This allows the support unit to be both very stable and particularly lightweight, so that it contributes only minimally to the overall weight of the machine tool. It is preferred, according to the invention, that the support unit is rigidly connected to the motor housing and is configured to accommodate the electronics, interfaces, contacts, batteries, and/or damping elements.
  • the support provides an internal structure for the main body of the machine tool, whereby the machine tool components located within the main body can be attached to the support unit. It is preferred according to the invention that the protective frame and the upper handle can also be attached to the support unit.
  • the housing of the machine tool can preferably consist of two housing shells, which can also be mounted on the support unit.
  • the support together with the motor housing, forms a central component for the cooling airflow.
  • the electronics of the machine tool are suspended within or on the support unit to effectively prevent the accumulation of dust and/or water.
  • the support unit can include a heat sink for cooling the electronics, and an airflow can be directed through the support for this purpose.
  • the support unit is inclined backwards at an angle greater than 3 degrees, preferably in the range of 5 degrees. It is preferred, according to the invention, that the angle of inclination is preferably formed between an imaginary ground plane on which the machine tool can be placed and a plane that runs centrally through the support unit of the machine tool.
  • the interfaces and contacts for connecting the machine tool to the accumulators are essentially horizontal.
  • the accumulators within the machine tool are also oriented essentially horizontally.
  • the term "essentially horizontal" preferably means that the aforementioned components are not inclined within the machine tool, i.e., that any straight line or plane passing through them forms an angle of essentially 0 degrees with an imaginary ground plane. In other words, an imaginary straight line or plane through the interfaces, contact surfaces, and/or accumulators passes essentially parallel to an imaginary ground plane.
  • the inclination of the support unit is determined by the top surface or outer contour of the machine tool, ensuring particularly efficient water drainage and thus protecting the battery interfaces and contact surfaces. Additional ribs channel surface water into non-critical areas of the machine tool, optimally protecting the battery interfaces and contact surfaces from moisture.
  • the motor of the power tool is arranged transversely to the batteries.
  • the power tool preferably comprises a motor housing, which in turn includes a gearbox, a belt, and a cutting arm.
  • the belt as the drive means for the cutting disc, preferably operates with a 1:1 gear ratio.
  • a second handle with an operating switch is preferably arranged above or in close proximity to the electronics of the power tool.
  • the power tool also includes a first handle that extends around the cutting tool and incorporates an integrated tap or water valve. Additionally, the power tool includes a protective frame that extends around the batteries and effectively protects them from impacts or drops.
  • the protective frame primarily protects the batteries from lateral impacts
  • a rear portion of the upper, second handle projects beyond the main body of the power tool; this projection is referred to as the overhang.
  • the overhang can, for example, have a length of approximately 6 cm; it primarily protects the power tool from impacts on the rear of the device.
  • the protective frame and handles of the angle grinder are preferably decoupled from the vibrations generated by the rotation of the cutting disc during operation.
  • the angle grinder can incorporate damping elements, such as springs.
  • An aid for changing the cutting disc can be located on the underside of the machine tool. It is secured with an O-ring. It is preferred, according to the invention, that the cutting disc of the proposed angle grinder has a blade diameter greater than 230 mm.
  • Figure 1 shows a side view of a preferred embodiment of the proposed machine tool 1 in the left half of the image and a rear view of a preferred embodiment of the proposed machine tool 1 in the right half of the image.
  • the front area of the machine tool 1 is formed by a tool 25, which in the case of the Fig. 1
  • the cutting edge of the illustrated angle grinder 1 is formed by a cutting disc 25.
  • the tool 25 can be surrounded by a blade guard, which may include a water supply and a handle.
  • the rear section of the machine tool 1 is formed by a main body 4, which has a housing 6.
  • the main body 4 of the machine tool 1 is surrounded by a protective frame 14, which includes an L-shaped structure 16.
  • the L-shaped structure 16 preferably includes a substantially horizontal lower section extending along the underside of the housing 6 of the machine tool 1. Furthermore, the L-shaped structure 16 may include a substantially vertical rear section extending along a rear side 9 of the main body 4 of the machine tool 1.
  • the protective frame 14 comprises two L-shaped structures 16, which are connected to each other by a connecting web at the rear side 9 and at the front handle 12 of the main body 4 of the machine tool 1.
  • the protective frame 14 comprises a preferably circumferentially designed plastic injection molded part, which may have a U-profile with ribs.
  • the machine tool comprises a front, circumferential handle 12 and an upper, second handle 13.
  • Actuating switches 21 can be arranged on the upper, second handle 13, with which the machine tool 1 can be operated. These actuating switches 21 can, in particular, be arranged on the underside of the second handle 13.
  • the machine tool 1 can also have an activation lock 30, which is preferably arranged on the top side of the second handle 13. It is preferred, according to the invention, that the actuating switch 21 can only be operated when the activation lock 30 permits this. It is also preferred, according to the invention, that the underside of the second handle 13 faces or is opposite the top side 10 of the housing 6 of the machine tool 1.
  • the upper surface 10 of the housing 6 is preferably inclined at an angle of 3 to 5 degrees, i.e., liquid falling onto the upper surface 10 of the housing 6 is deflected in a rearward and/or downward direction. This inclination is determined by the angle of inclination B (see Fig. 7 ) described.
  • the deflection of the fluid is described in Fig. 1
  • the fluid drainage is represented by the dashed line in the area of the housing 6 of the machine tool 1.
  • the fluid drainage can be seen from the presence of ribs 11 on the housing 6.
  • the main body 4 of the machine tool 1 can be further improved. Possible arrangements of the ribs 11 are shown in the lower figure. Fig. 1 depicted.
  • the ribs 11 preferably form a raised boundary of the main body 4 of the machine tool 1.
  • the ribs 11 preferably form a finishing edge of the main body 4 of the machine tool 1, which is arranged, among other places, on the top surface 10 of the housing 6 of the machine tool 1.
  • Ribs 11 can also form the sides of the main body 4 of the machine tool 1 and the rear end of the housing 6 of the machine tool 1. It is preferred, according to the invention, that the ribs 11 have a height of up to 2 cm.
  • the ribs 11 can therefore be 1.75 cm, 1.33 cm, 1 cm, 0.5 cm, or 0.3 cm high, without being limited to these heights.
  • the ribs 11 are designed to guide water flow, so that dirt and/or rainwater does not enter the area of sensitive components of the machine tool 1.
  • Sensitive areas of the machine tool 1 are, for example, the accumulators 2, 3 or their interfaces 18 or contacts 19 or their charge level indicator 31.
  • the area of the second handle 13, on which the at least one actuating switch 21 is located, is referred to as the central part of the second handle 13 and is preferably also inclined.
  • the second handle 13 preferably projects beyond a rear surface 9 of the main body 4 of the machine tool 1, thereby forming a so-called overhang 17. This provides particularly good protection for the machine tool 1 and its internal components against vibrations and impacts acting on the machine tool 1 from the direction of the rear surface 9 of the main body 4.
  • the overhang 17 of the second handle 13 provides particularly good protection for the machine tool 1 if it is in danger of falling onto its rear surface 9.
  • the projection 17 also has the further advantage that the distance between the two handles 12, 13 increases, so that the handling of the machine tool 1 can be improved and made safer.
  • the motor 5 is located in a front area of the main body 4 of the machine tool 1.
  • a protective plate 28 can be arranged on a front 27 of the housing 6 of the machine tool 1, which protects the main body 4 and its internal components from dust, sparks, dirt, splashing water, or metal shavings.
  • the accumulators 2, 3 of the machine tool 1, which supply the machine tool 1 with energy, are located in a rear, lower area of the main body 4 of the machine tool 1. They thus serve as the energy source of the machine tool 1.
  • the first accumulator 2 The first accumulator is located in a first receiving chamber 7, while the second accumulator 3 is arranged in a second receiving chamber 8.
  • the arrangement of the accumulators 2, 3 in the receiving chambers 7, 8 within the main body 4 of the machine tool 1 is also shown in the right half of the image.
  • Fig. 1 Clearly visible, showing a rear side 9 of the main body 4 of the machine tool 1.
  • a protective plate 28 can be arranged on a front surface 27 of the housing 6 of the machine tool 1, protecting the main body 4 and its internal components from dust, sparks, dirt, splashing water, or metal shavings.
  • the front surface 27 of the housing 6 of the machine tool 1, as well as the protective plate 28 located on the front surface 27 of the housing 6 of the machine tool 1, is particularly important in the following areas: Fig. 2 It is preferred, according to the invention, that the protective shield 28 is attached to the front, circumferential handle 12 or forms a component of this front handle 12. The trajectories of possible objects from which the protective shield 28 is intended to protect the hand-held power tool 1 are also shown. Fig. 2 as shown (see arrows below left).
  • the protective plate 28 is made of metal or another fire-resistant material in order to protect the machine tool 1, in particular from hot sparks. It is preferred, according to the invention, that the front face 27 of the housing 6 of the machine tool 1 faces or is arranged opposite the tool 25 of the machine tool 1.
  • Fig. 2 The left half of the image shows a side view of a preferred embodiment of the proposed machine tool 1, and the right half of the image shows an oblique front view of the proposed machine tool 1.
  • FIG. 3 Figure 1 shows a rear view of a preferred embodiment of the proposed machine tool 1 without accumulators 2, 3.
  • the protective frame 14, as well as the first handle 12 and the second handle 13, are shown.
  • the main body 4 of the machine tool 1 with its housing 6 is located within the protective frame 14, with the accumulators 2, 3 and their receiving spaces 7, 8 being arranged within the main body 4 of the machine tool 1.
  • the accumulators 2, 3 and their receiving spaces 7, 8 are located in a rear, lower region of the main body 4 of the machine tool 1.
  • the housing 6 of the main body 4 of the machine tool 1 comprises a rear side 9, which forms the rear termination of the main body 4 of the machine tool 1.
  • the charge level indicator 31 of the accumulators 2, 3 is clearly visible from the rear below the housing 6 and behind the protective frame 14 of the machine tool 1.
  • Interface 18 and contacts 19 for accumulators 2 and 3 are also in Fig. 4
  • Figure 1 shows a side view of a preferred embodiment of the proposed machine tool 1 without accumulators 2, 3.
  • the electronics 20 of the machine tool 1 are arranged above the interface 18 and above the contacts 19 for the accumulators 2, 3.
  • the electronics 20 are located in close proximity to the actuating switches 21 on the second handle 13 of the machine tool 1 to minimize transmission and communication paths.
  • the electronics 20 are located in close proximity to the accumulators 2, 3, again to shorten transmission and communication paths.
  • the electronics 20 are preferably held by a central support 32, which is also preferably referred to as the support unit 32.
  • the carrier unit 32 is fixedly connected to the motor housing 22 and is configured to accommodate the electronics 20, the interfaces 18, the contacts 19, the accumulators 2, 3 and/or the damping elements 15 of the machine tool 1. It is particularly preferred according to the invention that the carrier 32 forms an internal structure for the main body 4 of the machine tool 1, which can support or accommodate the aforementioned components of the machine tool 1.
  • Fig. 4 The motor 5 of the machine tool 1 is shown, which is arranged in a front region of the main body 4 of the machine tool 1.
  • the motor 5 has an axis that is essentially orthogonal to a longitudinal axis 29 of the machine tool 1.
  • the axis of the motor 5 of the machine tool 1 is preferably perpendicular to the longitudinal axis 29 of the machine tool 1.
  • This arrangement is described within the meaning of the invention by stating that the motor 5 of the machine tool 1 is oriented transversely to the accumulators 2, 3 of the machine tool 1.
  • the motor axis projects into Fig. 4 practically out of the picture plane, and its position is also shown in Fig. 5 depicted.
  • Fig. 5 depicted.
  • FIG. 5 also shows a possible position of the conceptual longitudinal axis 29 of the machine tool 1 (see top right in Fig. 5
  • the motor housing 22 can have air outlets from which the used cooling air can be blown out of the interior of the machine tool 1.
  • slots can be provided on the underside and/or rear of the motor housing 22 from which the cooling air is blown out.
  • Fig. 5 The figure shows a view of the underside of a preferred embodiment of the proposed machine tool 1.
  • the motor 5 is arranged within the machine tool 1. It is surrounded by a motor housing 22.
  • the motion generated by the motor 5 of the machine tool 1 is transmitted to the tool 25 of the machine tool 1 via drive means 26.
  • a gearbox 23 of the machine tool is arranged between the drive means 26 and the motor 5, preferably also arranged within the motor housing 22.
  • the drive means 26 can comprise or be formed by a belt.
  • the cutting disc 25 of the cut-off grinder 1 is connected to the main body 4 of the cut-off grinder 1 via a cutting arm 24, with the belt 26 running at least partially parallel to the cutting arm 24 to transmit the motion of the motor 5 of the cut-off grinder 1.
  • the accumulators 2, 3 are in Fig. 5 not shown. By omitting them, the battery interface 18 and the connection contacts 19, which electrically and electronically connect the accumulators 2 and 3 to the machine tool 1, can be seen.
  • Fig. 6 Figure 1 shows an oblique rear view of a preferred embodiment of the proposed machine tool 1 without accumulators 2, 3, without gearbox 23, without protective frame 14 and without handles 12, 13.
  • the damping means 15 are shown, which decouple the protective frame 14 and the handles 12, 13 from the vibrations generated during operation of the machine tool 1.
  • the damping means 15 preferably comprise springs or are formed by springs. It is preferred, according to the invention, that the machine tool 1 has three damping means 15 or springs for vibration decoupling. This effectively prevents the transmission of vibrations to the user, in particular their hands, arms, and shoulders, thus enabling longer and healthier working with the machine tool 1.
  • the illustration shows Fig. 6 the carrier unit 32, which is arranged within the main body 4 of the machine tool 1.
  • FIG. 7 Figure 1 shows the inclination angle A between the motor and the cutting axis, as well as the inclination angle B by which the surface 10 of the housing 6 of the machine tool 1 is inclined.
  • the inclination angle A can, for example, be between 10 and 30 degrees, while the inclination angle B is approximately 5 degrees.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Claims (13)

  1. Machine-outil (1) avec un premier accumulateur (2) et un second accumulateur (3) en tant que source d'énergie et un corps principal (4) et un moteur (5), le corps principal (4) comportant une première chambre de réception (7) pour recevoir le premier accumulateur (2) et une seconde chambre de réception (8) pour recevoir le second accumulateur (3), les espaces de réception (7, 8) étant disposés à l'intérieur d'un boîtier (6) du corps principal (4) de telle sorte que les accumulateurs (2,3) sont accessibles et interchangeables depuis un côté arrière (9) du corps principal (4), les espaces de réception (7,8) pour les accumulateurs (2,3) formant une terminaison inférieure du corps principal (4) de la machine-outil (1),
    un côté supérieur (10) du boîtier (6) du corps principal (4) de la machine-outil (1) étant formée avec une inclinaison pour assurer une évacuation définie de liquide.
    caractérisée en ce que
    le côté supérieure (10) du boîtier (6) comporte des nervures (11) pour assurer une évacuation définie de liquide.
  2. Machine-outil (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    la machine-outil (1) n'a pas besoin d'un volet supplémentaire ou d'un couvercle supplémentaire pour protéger les accumulateurs (2, 3) du liquide.
  3. Machine-outil (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    la machine-outil (1) comprend une première poignée circonférentielle (12), une seconde poignée supérieure (13) et un cadre de protection (14) destiné à protéger le corps principal (4) de la machine-outil (1).
  4. Machine-outil (1) selon la revendication 3,
    caractérisée en ce que
    la machine-outil (1) comporte des moyens d'amortissement (15) pour découpler les poignées (12, 13) et le cadre de protection (14) de vibrations qui apparaissent lors du fonctionnement de la machine-outil (1).
  5. Machine-outil (1) selon la revendication 3 ou 4,
    caractérisée en ce que
    le cadre de protection (14) comporte une structure en L (16).
  6. Machine-outil (1) selon l'une des revendications 3 à 5,
    caractérisée en ce que
    la seconde poignée (13) s'étend au-delà du corps principal (4) de la machine-outil (1) dans une direction spatiale arrière et forme ainsi un porte-à-faux (17).
  7. Machine-outil (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    le moteur (5) de la machine-outil (1) est orienté perpendiculairement aux accumulateurs (2, 3).
  8. Machine-outil (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    la machine-outil (1) est une tronçonneuse à meule.
  9. Machine-outil (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    les accumulateurs (2, 3) peuvent être connectés par une interface (18) et des contacts (19) à un système électronique (20) de la machine-outil (1).
  10. Machine-outil (1) selon la revendication 9, si elle dépend au moins de la revendication 3,
    caractérisée en ce que
    la seconde poignée (13) comprend au-dessus du système l'électronique (20) de la machine-outil (1) pour la machine-outil (1).
  11. Machine-outil (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    la machine-outil (1) comprend un boîtier (22) de moteur, le boîtier (22) de moteur comprenant un engrenage (23) de la machine-outil (1), un bras de coupe (24) pour un outil (25) de la machine-outil (1) et au moins un moyen (26) pour entraîner l'outil (25).
  12. Machine-outil (1) selon la revendication 11,
    caractérisée en ce que
    qu'au moins un moyen d'entraînement (26) de l'outil (25) de la machine-outil (1) s'étend au moins en partie parallèlement au bras de coupe (24).
  13. Machine-outil (1) selon l'une des revendications précédentes,
    caractérisée en ce que
    la machine-outil (1) comprend au moins une tôle de protection (28) pour protéger la machine-outil (1) sur un côté avant (27) du boîtier (6) du corps principal (4) de la machine-outil (1).
EP21814766.8A 2020-12-04 2021-11-17 Machine-outil doté d'un premier et d'un second accumulateur Active EP4255672B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20211898.0A EP4008478A1 (fr) 2020-12-04 2020-12-04 Machine-outil doté d'un premier et d'un second accumulateur
PCT/EP2021/081928 WO2022117337A1 (fr) 2020-12-04 2021-11-17 Outil électrique doté d'une première et d'une seconde batterie rechargeable

Publications (2)

Publication Number Publication Date
EP4255672A1 EP4255672A1 (fr) 2023-10-11
EP4255672B1 true EP4255672B1 (fr) 2026-02-18

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EP20211898.0A Withdrawn EP4008478A1 (fr) 2020-12-04 2020-12-04 Machine-outil doté d'un premier et d'un second accumulateur
EP21814766.8A Active EP4255672B1 (fr) 2020-12-04 2021-11-17 Machine-outil doté d'un premier et d'un second accumulateur

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US (1) US12186878B2 (fr)
EP (2) EP4008478A1 (fr)
CN (1) CN116529030A (fr)
WO (1) WO2022117337A1 (fr)

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EP4008478A1 (fr) 2020-12-04 2022-06-08 Hilti Aktiengesellschaft Machine-outil doté d'un premier et d'un second accumulateur
EP4008491A1 (fr) * 2020-12-04 2022-06-08 Hilti Aktiengesellschaft Machine-outil doté d'une première poignée, d'une seconde poignée et d'un corps principal
EP4008477A1 (fr) 2020-12-04 2022-06-08 Hilti Aktiengesellschaft Machine-outil pourvu de refroidissement à air et procédé de refroidissement des composants d'une machine-outil
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EP4008491A1 (fr) 2020-12-04 2022-06-08 Hilti Aktiengesellschaft Machine-outil doté d'une première poignée, d'une seconde poignée et d'un corps principal
EP4008477A1 (fr) 2020-12-04 2022-06-08 Hilti Aktiengesellschaft Machine-outil pourvu de refroidissement à air et procédé de refroidissement des composants d'une machine-outil
EP4008478A1 (fr) 2020-12-04 2022-06-08 Hilti Aktiengesellschaft Machine-outil doté d'un premier et d'un second accumulateur

Also Published As

Publication number Publication date
WO2022117337A1 (fr) 2022-06-09
EP4255672A1 (fr) 2023-10-11
EP4008478A1 (fr) 2022-06-08
US12186878B2 (en) 2025-01-07
CN116529030A (zh) 2023-08-01
US20240051109A1 (en) 2024-02-15

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