EP2750834A1 - Handle device - Google Patents

Handle device

Info

Publication number
EP2750834A1
EP2750834A1 EP12797722.1A EP12797722A EP2750834A1 EP 2750834 A1 EP2750834 A1 EP 2750834A1 EP 12797722 A EP12797722 A EP 12797722A EP 2750834 A1 EP2750834 A1 EP 2750834A1
Authority
EP
European Patent Office
Prior art keywords
handle
spring element
handle device
switch actuator
spring
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.)
Granted
Application number
EP12797722.1A
Other languages
German (de)
French (fr)
Other versions
EP2750834B1 (en
Inventor
Patrick Heinen
Carsten Diem
Axel Kuhnle
Willy Braun
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2750834A1 publication Critical patent/EP2750834A1/en
Application granted granted Critical
Publication of EP2750834B1 publication Critical patent/EP2750834B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/57—Elastomers, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/69—Foamed polymers, e.g. polyurethane foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/255—Switches
    • B25D2250/261—Means for locking an operative switch on
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/255—Switches
    • B25D2250/265—Trigger mechanism in handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/275—Tools having at least two similar components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/371—Use of springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/371—Use of springs
    • B25D2250/381—Leaf springs

Definitions

  • the invention relates to a handle device for a hand tool according to the preamble of the independent claims.
  • Antivibration handles with an elastic connection to the hammer also cause relative movements between the hammer and the handle itself due to the required rigidity as a side effect. From this, requirements for the interface between a hammer and an anti-vibration handle can be derived:
  • the invention relates to a handle device for a hand tool having an operating mode switching device and a drive device for driving an insert tool in different modes, with at least one spring element and with a machine housing at least limited movably mounted handle unit, which over the at least one spring element relative to the Machine housing is at least partially vibration decoupled and comprises a switch actuator to a commissioning of the drive device, wherein the switch actuator can be switched both mono-stable and bi-stable between two switching positions.
  • the handle device has an intermediate plate, which is provided in the machine housing and which accommodates at least the spring element on one side, and a control means, via which the switch actuator with the Radiogon tenschaltschaltvoriques cooperates such that in certain modes of the switch actuator is not bi-stable can be switched.
  • a control means via which the switch actuator with the Radiogon tenschaltschaltvoriques cooperates such that in certain modes of the switch actuator is not bi-stable can be switched.
  • the switch actuator only has a stable switching position, in which the switch actuator can be switched or in which the switch actuator preferably falls back automatically, while the switch operator in at least one other switching position of a operator must be kept in particular.
  • the term "bi-stableā€ should be understood in particular to mean that the switch actuator has two stable switching positions into which the switch actuator can be switched
  • Switch actuator is preferably formed as an on-off switch of the power tool.
  • the handle device according to the invention solves the task in a simple to assemble and cost-effective manner. It fulfills all requirements placed on it.
  • control means is designed as a drawstring.
  • the drawstring may preferably be made of a plastic or other material that appears appropriate to a person skilled in the art.
  • the tension band preferably has an at least substantially rectangular cross section with an at least substantially circular-like, in particular circular middle fiber. It is also conceivable for the middle formers to have an at least essentially four- or hexagonal or another cross-section which appears expedient to a person skilled in the art.
  • the middle fiber is preferably provided to serve at least partially as a filling channel, in particular during an injection process, and / or to form an advantageously narrow contact line with the leaf spring.
  • the drawstring may preferably be made of a plastic. As a result, an advantageous cost-effective design can be achieved.
  • the at least one spring element is formed by a leaf spring.
  • the handle device has at least one secondary spring element, which is formed by an elastomeric spring element.
  • the spring element formed by the leaf spring can be advantageously supported in a spring action, and use of the handle device, in particular in larger and more powerful hand tool machines, can be achieved.
  • the secondary spring element is acted upon only after a certain compression travel. It is proposed that the spring stiffness of the spring element formed by the leaf spring is adjusted so that with a compression travel between 2 mm and 10 mm, preferably between 3 mm and 7 mm, more preferably between 4 mm and 5 mm minimum operating pressure points for most important Use cases can be achieved. From this Andruckschwelle the secondary spring element begins to act. The more volume of the
  • Eiastomerfederelements is designed such that at an additional compression of 2 mm to 5 mm, in particular from 3 mm to 4 mm over a minimum operating pressure point beyond the elastomeric spring element is compressed to 70% of its original volume. In a further compression of 1 mm to 2 mm, virtually the entire volume of the Eiastomerfederelements is acted upon, so that the spring stiffness increases relatively quickly. This has the advantage that in a case on the Antivibrati- onshandgriff very much energy can be absorbed, so that the impact-like components are less loaded.
  • FIG. 1 a shows a handheld power tool with a handle device according to the invention in a schematic side view
  • Fig. 1 b shows a detail of the handle device according to the invention in a
  • Sectional view 2 shows an assembly of the handle device according to the invention in a perspective view
  • 3a shows a detail of the handle device according to the invention in one
  • FIG. 4a shows a detail of the handle device according to the invention in a
  • Fig. 4c shows a detail of the handle device according to the invention in one
  • Fig. 5 shows a detail of the handle device according to the invention in a
  • FIG. 6a shows a part of the assembly of the handle device according to the invention in a perspective view
  • 6b shows a part of the assembly of the handle device according to the invention in a side view
  • 6c shows a part of the assembly of the handle device according to the invention in a side view
  • FIG. 7a shows a control means of the handle device according to the invention in a schematic representation
  • FIG. 8a shows a detail of the handle device according to the invention in one
  • Fig. 10 shows a detail of the handle device according to the invention in a
  • Sectional view Fig. 1 1 a detail of the handle device according to the invention in a
  • Fig. 12b shows a detail of the handle device according to the invention in one
  • Fig. 13 shows a detail of the handle device according to the invention in one
  • Fig. 14b shows a detail of the handle device according to the invention in one
  • Fig. 15 shows a detail of the handle device according to the invention in a
  • FIG. 1 shows a schematic view of a drill and / or chisel hammer as an example of a hand tool 10 with a machine housing 20, a tool holder 54 movably mounted on the machine housing 20 for exchangeable reception of an insert tool 16 and with a housing 20 accommodated in the machine housing, a drive unit and a gear unit having drive device 14 for driving the insert tool 16 in different modes.
  • the tool holder 54 is preferably rotatably arranged on an end face of the machine housing 20.
  • a handle device is further provided in the example of Figure 1 further.
  • the handle device comprises in the present example a switch actuator 24 for commissioning the drill and / or chisel hammer.
  • the switch actuator 24 can be switched both monostable and bi-stable between two switching positions.
  • an additional handle device 56 is arranged on the machine housing 20 of the drill and / or chisel hammer, in particular arranged adjustable.
  • the hand tool 10 has an operating mode switching device 12.
  • a Conshebei for a mode switch is arranged on the machine housing 20, with which an operator can choose between different drive types for the insert tool 16 used in the tool holder 54.
  • the handle device for the power tool 10 comprises a spring element 18 and a at least limited movably mounted on the machine housing 20 handle unit 22 which is vibration-decoupled via the spring member 18 relative to the machine housing 20 and the switch actuator 24 includes a commissioning of the drive device 14.
  • the handgrip unit 22 comprises an anti-vibration handle 58.
  • the handheld power tool device further comprises a control means 28, via which the switch actuator 24 cooperates with the mode changeover device 12 in such a way that in certain operating modes
  • Switch actuator 24 can not be bi-stable switched.
  • the control means 28 is designed as a drawstring 30.
  • the u.a. shown assembly consists of the following functional units: an intermediate plate 26, the spring element 18 and a slide valve assembly.
  • the intermediate plate 26 is the central
  • One of the central tasks of the intermediate plate 26 is the receiving and guiding of the spring element 18, as shown in Figures 3a and 3b.
  • the spring element 18 is clamped by the intermediate plate 26 in the anti-vibration handle 58 and fixed at the clamping point over a contour.
  • the contour is preferably realized in a contact surface on the intermediate plate 26, on which the spring element 18 can be supported. The curve of this contour determines stiffness, bending line and paths of the spring element 18.
  • the spring element 18 is designed as a leaf spring 32.
  • the intermediate plate 26 serves as a stop for or as a stop for one or more secondary spring elements 34, 34 ', 34 ", which can serve as damping elements.
  • FIGS. 4a to 4c show conceivable variants and embodiments of the secondary spring elements 34, 34', 34 "presented.
  • pockets with supporting ribs 60 and a frame 62 additionally provide for the introduction of damping elements into the intermediate plate 26.
  • the secondary spring elements 34, 34 ', 34 " can preferably be made of foam, a cellular rubber
  • Sponge rubber another synthetic or natural foam, elastomer, TPE, rubber, be formed gel or a similar elastic material.
  • the degree of damping or suspension can also be adjusted via the volume of individual chambers.
  • the frame 62 prevents jamming with other surrounding components.
  • the trained as a drawstring 30 control means 28 is made of plastic.
  • Slide valve 66 paired with jumps / steps in the guide prevents one Dust enclosure between sliding surfaces. As a result, a malfunction can be avoided by clamping on the slide valve 66 in principle.
  • the z-shaped, cranked slide switch 66 can be pushed into the intermediate plate 26 with a simple sliding movement and locked in place by means of a snap hook connection, not shown, in the intended installation position. It is also conceivable that the z-shaped, cranked slide switch 66 can rotate into the intermediate plate 26 with a simple pivoting movement.
  • the aspect ratio of the guide surfaces ensures sufficient pre-centering during the entire pre-assembly. A wrong assembly is thereby excluded.
  • plastic offers a great variety of variations in order to combine low friction values with good emergency running properties and low dust susceptibility. Therefore, a plastic is fundamentally a very suitable material for this application. In order to achieve sufficient rigidity for the transmission of tensile forces, while at the same time lose flexibility for a driving on the spring element 18, cross-sectional conditions are determining.
  • a band cross section of the tension band 30 must be very flat in height and long in the width.
  • a rectangular cross-section with an aspect ratio of 1:10 was combined with a substantially circle-like - lo chen, in particular circular, medium fiber chosen (see Figures 7a to 7c), but it can also cross sections with rounded corners and / or different aspect ratios, in particular in the range between 1: 2 to 1: 20, particularly preferably from 1: 5 to 1: 15 be beneficial.
  • the substantially circle-like, in particular circular portion serves to fill the mold in the manufacturing process and at the same time advantageously increases the strength.
  • a buffer is created by the installation situation in the slide valve 66, which can compensate for any blurring of manufacture and mechanical behavior of the tension band 30, which is made of plastic.
  • the drawstring 30 must have a body for receiving the compensation spring 68 and safely taken up with the help of two rotational recordings in the slide valve 66 / performed.
  • the slide valve 66 supports the compensation spring 68 on the opposite side and determines the measure of the compensation over the installation length.
  • the path from the slide valve 66 is now transmitted force-dependent on the drawstring 30 and the switch actuator 24 (see Figures 8a and 8b).
  • the coupling is no longer rigid but linear-elastic.
  • the paths between the slide valve 66 and switching lever on the switch actuator 24, which forms a hammer switch, are designed so that in the compensation spring 68 is always a
  • Reserved reserve This reserve from the length of the compensation spring 68 in operation can be used for tolerance compensation and compensation of thermal, elastic as well as plastic changes in length on the drawstring 30, which is made of plastic. An overload protection is ensured and tensile forces are now applied to the tension band 30 via the compensation spring 68.
  • the labyrinth 70 engages the transitions into the surrounding parts and, especially during the switchover of the switch actuator 24 formed by the hammer switch, effectively ensures dust protection and safe operation. Additional sealing elements are not required.
  • Another aspect of the invention relates to the fact that for larger and more powerful hand tool machines 10, such as e.g. in heavy drilling and
  • the above-described fixation of the leaf spring 32 between the anti-vibration handle 58 and the machine housing 20 is no longer sufficient.
  • the leaf spring 32 is no longer sufficient as the sole spring element.
  • Additional secondary spring elements 34 have to be introduced between the machine housing 20 and the leaf spring 32 in order to prevent the too soft leaf spring 32 in its ih- to support spring action.
  • the secondary spring elements 34 are each formed by an elastomeric spring element 36.
  • the leaf spring can be acted upon by a clamping piece and the screw plate only on the back side functionally or with forces. On the side of the leaf spring facing the device side, no holding or fixing functions or forces can be introduced.
  • the invention thus represents an extension of the known from the document DE 10 2006 029 630 A1 solution to implement the presented there anti-vibration handle concept even with larger and more powerful hand tool machines can.
  • the operator-held anti-vibration handle 58 includes the switch actuator 24 formed as an on-off switch, and is closed by screwing a handle of the anti-vibration handle 58 backward.
  • the leaf spring 32 is clamped between the anti-vibration handle 58 and two screw plates 48.
  • the two screw plates 48 are pushed in the transverse direction on both sides of the leaf spring 32.
  • the screw plates 48 thus enclose an upper clamping region 50 of the leaf spring 32 up to the contact zone to the anti-vibration handle 58 in all spatial directions. This ensures a durable and stable enclosure of the leaf spring 32.
  • screw dome 52 which serve for screwing the screw 48 and thus one of the leaf spring 32 with the anti-vibration handle 58.
  • the screw 48, the leaf spring 32, the anti-vibration handle 58 and a strained bellows 72 form a fastening system, which is held together advantageously on form and frictional connection.
  • the positive connection is formed by mutually supporting and penetrating retaining domes and ribs, so that the adhesion has only a fixing function and the essential forces are absorbed by the positive connection of the components.
  • a significant advantage of the screw plates 48 pushed on both sides is the provision of additional functional surfaces in front of a region and laterally of a region of the screw plates 48 of the leaf spring 32.
  • the screw plates 48 are formed so that they can accommodate the additional secondary spring elements 34. In addition to spring shots have the screw 48 even more features.
  • the screw plates 48 In order to prevent tearing out of the anti-vibration handle 58 and thus also overloading of the leaf spring 32, the screw plates 48 have lateral abutment surfaces which are supported on the back on two rear plates 38 designed as housing rear plates. As a result, the anti-vibration handle 58 has a stable and defined back stop.
  • Another function of the screw 48 is the lateral guiding and covering the control means 28 formed by the tension band 30 relative to that of a
  • Tieback 30 must be able to slide smoothly on the leaf spring 32 and must not be jammed or pinched.
  • Bellows 72 is chambered by the screw plates 48 in the anti-vibration handle 58. Furthermore, the screw 48 also form the end stop in the longitudinal and vertical direction of the anti-vibration handle 58.
  • the lower Blattfederklemmung is in the screw system of the back plates
  • the previously one-piece backplate was split into two mirror-symmetrical backplates 38 in order to fulfill all required functions, favorable mountability and mold endformability.
  • the bellows 72 already mounted on the anti-vibration handle 20 and the rocker arms (not shown) are chambered during assembly by pushing the two back plates 38 together. Due to the required bias of the leaf spring 32, the leaf spring 32 is then a bit of the back plates designed as housing rear plates 38 from.
  • a spring plate 40 is inserted above with its two retaining ribs 42 in two corresponding retaining grooves 44 formed as housing rear plates back plates 38 and then folded against a leaf spring tension in the direction of the back plates 38 to the rear , In order to hold this position, two are in the back plates 38
  • Snap hook 46 integrates, which engage in the spring plate 40 and these in the Keep assembly position.
  • the thus pre-assembled complete, designed as a handle assembly handle device can then be applied in an assembly line on the core device.
  • the leaf spring 32 For clamping the leaf spring 32 both positive and positive elements are used. As a positive connection, the leaf spring 32 has at its lower end two openings and a Abfalzung 74.
  • the leaf spring 32, the spring plate 40 and the machine housing 20 are threaded onto two domes of the respective side of the back plates formed by the housing rear plates 38. Furthermore, the spring plate 40 engages around the two screw domes of the machine housing 20.
  • the Abfalzung 74 of the leaf spring 32 is clamped between the back plates 38 and the spring plate 40.
  • the spring plate 40 is designed in its contour height so that the leaf spring 32 is firmly clamped down to about 25% of its length. The remaining length can cantilever freely during compression.
  • Another aspect of the invention is the combination of the leaf spring 32 as the primary spring element and the at least one further secondary spring element 34, which is acted upon only after a certain compression travel.
  • FIG. 15 shows a cross-section through the upper region of the anti-vibration handle 58 with the leaf spring 32 and the secondary spring element 34.
  • the screw plates 48 which surround the leaf spring 32, are designed to receive the one or the additional secondary spring elements 34 can.
  • a foamed elastomer molded part between the screw plate 48 or the leaf spring 32 and the spring plate 40 is introduced.
  • the elastomeric molded part is formed as the elastomeric spring element 36 and forms the secondary spring element 34.
  • Foamed elastomer moldings have the advantage of cost-effective production by a continuous extrusion molding process with subsequent cutting to the required length. Furthermore, they act in virtually all directions, ie they have no preferred direction such as a helical compression spring.
  • the advantageous, formed as Elastomerfederelement 36 secondary spring element 34 supports the leaf spring 32 at loads that are above an optimal Radio Santikticians.
  • the optimum operating pressure point is the minimum pressure that the operator just has to provide in order for the hand tool 10 formed by the hammer to perform a regular and clean impact operation. This operating pressure is dependent on the power class of the power tool 10 and the particular application.
  • the spring stiffness of the leaf spring 32 is adjusted so that with a compression travel between 2 mm and 10 mm, preferably between
  • Elastomer spring element 36 is compressed to 70% of its original volume. With further compression of 1 mm to 2 mm, almost the entire volume of
  • Elastomer spring member 36 is applied, so that the spring stiffness relatively quickly increases. This has the advantage that in a case on the anti-vibration handle 58 a lot of energy can be absorbed, so that the impact-like components are less loaded. A described compression characteristic can also be effected or supported by a targeted shaping of the elastomer spring element 36. It is thus also possible to install tubular or other contours that can be produced in an extrusion process.
  • the elastomer spring element 36 is preferably made of foamed elastomer (sponge rubber), which is produced in a continuous extrusion molding process with subsequent cutting to length.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

The invention relates to a handle device for a hand-held power tool, which hand-held power tool has an operating-mode switching device and a driving device for driving an insert tool in different operating modes, the handle device comprising at least one spring element (18) and a handle unit (22) attached in at least limitedly movable manner to a power tool housing (20). The handle element is at least partially vibrationally decoupled from the power tool housing (20) by means of the at least one spring element (18) and has a switch actuator (24) for starting up the driving device (14), wherein the switch actuator (24) can be switched between two switching positions in both a monostable manner and a bistable manner. According to the invention, the handle device has an intermediate plate (26), which is provided in the power tool housing (20) and which at least accommodates the spring element (18) at one end, and a control element (28), by means of which the switch actuator (24) interacts with the operating-mode switching device (12) in such a way that bistable switching is not possible in certain operating modes of the switch actuator (24).

Description

Beschreibung Ā description
Handgriffvorrichtung Stand der Technik Handle device prior art
Die Erfindung betrifft eine Handgriffvorrichtung fĆ¼r eine Handwerkzeugmaschine nach der Gattung der unabhƤngigen AnsprĆ¼che. The invention relates to a handle device for a hand tool according to the preamble of the independent claims.
Durch Inkrafttreten gesetzlicher Forderungen, die eine Begrenzung des Vibrationsver- halten an handgefĆ¼hrten Elektrowerkzeugen beinhalten, findet in der Branche diesesThe entry into force of legal requirements, which limit the vibration behavior of hand-held power tools, has given rise to this in the industry
Thema eine immer grĆ¶ĆŸer werdende Bedeutung. Gerade bei schweren Bohr- und SchlaghƤmmern ist aufgrund der hohen EinzelschlagstƤrke ein Vibrieren sehr ausgeprƤgt. Durch Norm bzw. Gesetz wird nun festgeschrieben, wie lange der Anwender abhƤngig vom Vibrationsniveau der Maschine fortwƤhrend damit arbeiten darf. Ɯber- steigt die Belastung aus der Vibration festgelegte Grenzwerte, wird die zulƤssige Nutzungsdauer pro Tag entsprechend reduziert. Topic an ever-increasing importance. Especially with heavy drilling and impact hammers due to the high single impact strength vibration is very pronounced. The standard or law now stipulates how long the user may work with it, depending on the vibration level of the machine. If the load from the vibration exceeds specified limits, the permissible service life per day is correspondingly reduced.
Infolgedessen wird bei der Produktentwicklung zunehmend an MaƟnahmen zur Vibrationsreduktion gearbeitet. PrimƤrziel ist, den Bedienkomfort weiter zu steigern und ein praxisgerechtes MaƟ fĆ¼r die damit verbundene Nutzungsdauer pro Tag aufrechtzuerhalten. Zur Senkung von Vibrationen in HƤmmern wird meist ein Teil der Maschinenbewegung direkt Ć¼ber Handgriffe fĆ¼r einen Bediener entkoppelt. Bei der Art der Entkopplung bedient sich der Markt grundlegend unterschiedlicher Konzepte. Neben einem DoppelschalengehƤuse ist die meistverbreitete Methode ein Handgriff mit elasti- scher Anbindung zum Hammer, um die auftretenden Schwingungen Ć¼ber Federung und DƤmpfung vom Bediener zu entkoppeln. As a result, product development is increasingly working on vibration reduction measures. The primary goal is to further increase the ease of use and to maintain a practicable measure of the associated service life per day. In order to reduce vibrations in hammers, part of the machine movement is usually decoupled directly by means of handles for an operator. With regard to the type of decoupling, the market uses fundamentally different concepts. In addition to a double-shell housing, the most widely used method is a handle with an elastic connection to the hammer, in order to decouple the occurring vibrations from the operator via suspension and damping.
Antivibrationshandgriffe mit elastischer Anbindung am Hammer bewirken aufgrund der erforderlichen Steifigkeiten als Nebeneffekt auch Relativbewegungen zwischen Ham- mer und Handgriff selbst. Daraus lassen sich Anforderungen fĆ¼r die Schnittstelle zwischen einem Hammer und einem Antivibrationshandgriff neu ableiten: Antivibration handles with an elastic connection to the hammer also cause relative movements between the hammer and the handle itself due to the required rigidity as a side effect. From this, requirements for the interface between a hammer and an anti-vibration handle can be derived:
ā–” Der Antivibrationshandgriff muss trotz seiner elastischen Anbindung zur Entkopplung weiterhin eine prƤzise FĆ¼hrung der Handwerkzeugmaschine ermƶglichen. Ā ā–” In spite of its elastic connection for decoupling, the anti-vibration handle must continue to allow precise guidance of the power tool.
ā–” Anbindung und FĆ¼hrung des Antivibrationshandgriffs sollten den Hammer in seiner GrĆ¶ĆŸe/LƤnge ergonomisch nicht beeinflussen. Ā ā–” Connecting and guiding the anti-vibration handle should not affect the hammer's ergonomic size / length.
ā–” Bei der Auslegung der im Antivibrationshandgriff innen liegenden Teile ist die zusƤtzliche Bewegung aus der Entkopplung von der Handwerkzeugmaschine zu berĆ¼cksichtigen. Ā ā–” When designing the internal parts in the anti-vibration handle, the additional movement from the decoupling of the hand-held power tool must be taken into account.
ā–” Staubschutz muss sichergestellt werden. Ā ā–” Dust protection must be ensured.
ā–” Die Umschaltung vom Hammerschalter in AbhƤngigkeit von einer Betriebsart des Hammers, insbesondere die Umschaltung der Schalterfunktion und die Arretierbarkeit des Hammerschalters, soll weiterhin erhalten bleiben. Ā ā–” The switchover from the hammer switch as a function of an operating mode of the hammer, in particular the switching of the switch function and the lockability of the hammer switch, should continue to be maintained.
Offenbarung der Erfindung Disclosure of the invention
Die Erfindung geht aus von einer Handgriffvorrichtung fĆ¼r eine Handwerkzeugmaschine, die eine Betriebsartenumschaltvorrichtung und eine Antriebsvorrichtung zum Antrieb eines Einsatzwerkzeugs in unterschiedlichen Betriebsarten aufweist, mit zumindest einem Federelement und mit einer an einem MaschinengehƤuse zumindest begrenzt beweglich angebrachten Handgriffeinheit, welche Ć¼ber das zumindest eine Federelement gegenĆ¼ber dem MaschinengehƤuse zumindest teilweise schwingungsent- koppelt ist und einen SchalterbetƤtiger zu einer Inbetriebnahme der Antriebsvorrichtung umfasst, wobei der SchalterbetƤtiger sowohl mono-stabil als auch bi-stabil zwischen zwei Schaltpositionen geschaltet werden kann. The invention relates to a handle device for a hand tool having an operating mode switching device and a drive device for driving an insert tool in different modes, with at least one spring element and with a machine housing at least limited movably mounted handle unit, which over the at least one spring element relative to the Machine housing is at least partially vibration decoupled and comprises a switch actuator to a commissioning of the drive device, wherein the switch actuator can be switched both mono-stable and bi-stable between two switching positions.
Es wird vorgeschlagen, dass die Handgriffvorrichtung eine Zwischenplatte aufweist, die im MaschinengehƤuse vorgesehen ist und welche zumindest das Federelement einseitig aufnimmt, und ein Steuermittel, Ć¼ber das der SchalterbetƤtiger mit der Betriebsar- tenumschaltvorrichtung derart zusammenwirkt, dass in bestimmten Betriebsarten der SchalterbetƤtiger nicht bi-stabil geschaltet werden kann. Unterā€žmono-stabil" soll in diesem Zusammenhang insbesondere verstanden werden, dass der SchalterbetƤtiger nur eine stabile Schaltposition aufweist, in die der SchalterbetƤtiger geschaltet werden kann bzw. in die der SchalterbetƤtiger vorzugsweise selbststƤndig zurĆ¼ckfƤllt, wƤhrend der SchalterbetƤtiger in zumindest einer anderen Schaltposition von einem Bediener insbesondere gehalten werden muss. Unterā€žbi-stabil" soll in diesem Zusammenhang insbesondere verstanden werden, dass der SchalterbetƤtiger zwei stabile Schaltpositionen aufweist, in die der SchalterbetƤtiger geschaltet werden kann. Der It is proposed that the handle device has an intermediate plate, which is provided in the machine housing and which accommodates at least the spring element on one side, and a control means, via which the switch actuator with the Betriebsarten tenschaltschaltvorrichtung cooperates such that in certain modes of the switch actuator is not bi-stable can be switched. By "mono-stable" is to be understood in this context, in particular, that the switch actuator only has a stable switching position, in which the switch actuator can be switched or in which the switch actuator preferably falls back automatically, while the switch operator in at least one other switching position of a operator must be kept in particular. In this context, the term "bi-stable" should be understood in particular to mean that the switch actuator has two stable switching positions into which the switch actuator can be switched
SchalterbetƤtiger ist vorzugsweise als Ein-Aus-Schalter der Handwerkzeugmaschine gebildet. Switch actuator is preferably formed as an on-off switch of the power tool.
Die erfindungsgemƤƟe Handgriffvorrichtung mit den Merkmalen des Hauptanspruchs lƶst die gestellte Aufgabe auf einfach montierbare und kostengĆ¼nstige Weise. Sie erfĆ¼llt dabei alle an sie gestellten Anforderungen. The handle device according to the invention with the features of the main claim solves the task in a simple to assemble and cost-effective manner. It fulfills all requirements placed on it.
Durch die in den UnteransprĆ¼chen und in der nachfolgenden Beschreibung der AusfĆ¼hrungsbeispiele aufgefĆ¼hrten MaƟnahmen ergeben sich vorteilhafte Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Merkmale. The measures listed in the dependent claims and in the following description of the embodiments, advantageous refinements and improvements of the main claim features.
So wird ferner vorgeschlagen, dass das Steuermittel als ein Zugband ausgebildet ist. Das Zugband kann vorzugsweise aus einem Kunststoff oder einem anderen, einem Fachmann als sinnvoll erscheinenden Material gefertigt sein. Das Zugband weist vorzugsweise einen zumindest im Wesentlichen rechteckigen Querschnitt mit einer zumindest im Wesentlichen kreisƤhnlichen, insbesondere kreisrunden Mittelfaser auf. Es ist ferner denkbar, dass die Mittelfaster einen zumindest im Wesentlichen vier- oder sechseckigen oder einen anderen, einem Fachmann als sinnvoll erscheinenden Querschnitt aufweist. Die Mittelfaser ist vorzugsweise dazu vorgesehen, zumindest teilweise als FĆ¼llkanal insbesondere bei einem Spritzprozess zu dienen und/oder eine vorteilhaft schmale BerĆ¼hrlinie zur Blattfeder zu bilden. Das Zugband kann vorzugsweise aus einem Kunststoff gefertigt sein. Dadurch kann eine vorteilhaft kostengĆ¼nstige Ausgestaltung erreicht werden. Thus, it is further proposed that the control means is designed as a drawstring. The drawstring may preferably be made of a plastic or other material that appears appropriate to a person skilled in the art. The tension band preferably has an at least substantially rectangular cross section with an at least substantially circular-like, in particular circular middle fiber. It is also conceivable for the middle formers to have an at least essentially four- or hexagonal or another cross-section which appears expedient to a person skilled in the art. The middle fiber is preferably provided to serve at least partially as a filling channel, in particular during an injection process, and / or to form an advantageously narrow contact line with the leaf spring. The drawstring may preferably be made of a plastic. As a result, an advantageous cost-effective design can be achieved.
Zudem wird vorgeschlagen, dass das zumindest eine Federelement von einer Blattfeder gebildet wird. Dadurch kann insbesondere eine bevorzugt kostengĆ¼nstige Umsetzung und eine vorteilhaft einfache Montage der Handgriffvorrichtung erreicht werden. In addition, it is proposed that the at least one spring element is formed by a leaf spring. As a result, in particular a preferably cost-effective implementation and an advantageously simple assembly of the handle device can be achieved.
Des Weiteren wird vorgeschlagen, dass die Handgriffvorrichtung mindestens ein SekundƤrfederelement aufweist, das von einem Elastomerfederelement gebildet ist. Dadurch kann das von der Blattfeder gebildete Federelement in einer Federwirkung vorteilhaft unterstĆ¼tzt werden und ein Einsatz der Handgriffvorrichtung insbesondere in grĆ¶ĆŸeren und leistungsfƤhigeren Handwerkzeugmaschinen kann erreicht werden. Ferner wird vorgeschlagen, dass das SekundƤrfederelement erst nach einem bestimmten Einfederweg beaufschlagt wird. Es wird vorgeschlagen, dass die Federsteifigkeit des von der Blattfeder gebildeten Federelements so eingestellt wird, dass mit einem Einfederweg zwischen 2 mm und 10 mm, vorzugsweise zwischen 3 mm und 7 mm, besonders bevorzugt zwischen 4 mm und 5 mm minimale Betriebsandruckpunkte fĆ¼r die meisten wichtigen AnwendungsfƤlle erreicht werden. Ab dieser Andruckschwelle fƤngt das SekundƤrfederelement an zu wirken. Je mehr Volumen des Furthermore, it is proposed that the handle device has at least one secondary spring element, which is formed by an elastomeric spring element. As a result, the spring element formed by the leaf spring can be advantageously supported in a spring action, and use of the handle device, in particular in larger and more powerful hand tool machines, can be achieved. It is also proposed that the secondary spring element is acted upon only after a certain compression travel. It is proposed that the spring stiffness of the spring element formed by the leaf spring is adjusted so that with a compression travel between 2 mm and 10 mm, preferably between 3 mm and 7 mm, more preferably between 4 mm and 5 mm minimum operating pressure points for most important Use cases can be achieved. From this Andruckschwelle the secondary spring element begins to act. The more volume of the
Eiastomerfederelements bei Einfederung verformt wird, desto steifer wird eine Kennlinie des SekundƤrfederelements. Eiastomerfederelements is deformed during compression, the stiffer is a characteristic of the secondary spring element.
Es wird deshalb weiterhin vorgeschlagen, dass eine Volumenverpressung des It is therefore further proposed that a volume compression of the
Eiastomerfederelements derart gestaltet wird, dass bei einem zusƤtzlichen Einfedern von 2 mm bis 5 mm, insbesondere von 3 mm bis 4 mm Ć¼ber einen minimalen Betriebsandruckpunkt hinaus das Elastomerfederelement zu 70 % seines Ausgangsvolumens komprimiert wird. Bei einem weiteren Einfedern von 1 mm bis 2 mm wird quasi das ganze Volumen des Eiastomerfederelements beaufschlagt, so dass die Federsteifigkeit relativ schnell ansteigt. Dies hat den Vorteil, dass bei einem Fall auf den Antivibrati- onshandgriff sehr viel Energie aufgenommen werden kann, so dass die stoƟartig beaufschlagten Bauteile weniger belastet werden. Eiastomerfederelements is designed such that at an additional compression of 2 mm to 5 mm, in particular from 3 mm to 4 mm over a minimum operating pressure point beyond the elastomeric spring element is compressed to 70% of its original volume. In a further compression of 1 mm to 2 mm, virtually the entire volume of the Eiastomerfederelements is acted upon, so that the spring stiffness increases relatively quickly. This has the advantage that in a case on the Antivibrati- onshandgriff very much energy can be absorbed, so that the impact-like components are less loaded.
Zeichnung drawing
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind mehrere AusfĆ¼hrungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die AnsprĆ¼che enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmƤƟigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen. Further advantages emerge from the following description of the drawing. In the drawing, several embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
Es zeigen: Show it:
Fig. 1 a eine Handwerkzeugmaschine mit einer erfindungsgemƤƟen Handgriffvorrichtung in einer schematischen Seitenansicht, 1 a shows a handheld power tool with a handle device according to the invention in a schematic side view,
Fig. 1 b einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā Fig. 1 b shows a detail of the handle device according to the invention in a
Schnittdarstellung, Fig. 2 eine Baugruppe der erfindungsgemƤƟen Handgriffvorrichtung in einer perspektivischen Darstellung, Sectional view 2 shows an assembly of the handle device according to the invention in a perspective view,
Fig. 3a einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer 3a shows a detail of the handle device according to the invention in one
Schnittdarstellung, Ā Sectional view
Fig. 3b die Baugruppe der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā 3b, the assembly of the handle device according to the invention in a
Schnittdarstellung, Ā Sectional view
Fig. 4a einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā 4a shows a detail of the handle device according to the invention in a
Schnittdarstellung, Ā Sectional view
Fig. 4b einen alternativ ausgestalteten Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Schnittdarstellung, Ā 4b an alternatively configured section of the handle device according to the invention in a sectional view,
Fig. 4c einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā Fig. 4c shows a detail of the handle device according to the invention in one
Schnittdarstellung, Ā Sectional view
Fig. 5 einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā Fig. 5 shows a detail of the handle device according to the invention in a
Schnittdarstellung, Ā Sectional view
Fig. 6a einen Teil der Baugruppe der erfindungsgemƤƟen Handgriffvorrichtung in einer perspektivischen Darstellung, Ā 6a shows a part of the assembly of the handle device according to the invention in a perspective view,
Fig. 6b einen Teil der Baugruppe der erfindungsgemƤƟen Handgriffvorrichtung in einer Seitenansicht, 6b shows a part of the assembly of the handle device according to the invention in a side view,
Fig. 6c einen Teil der Baugruppe der erfindungsgemƤƟen Handgriffvorrichtung in einer Seitenansicht, Ā 6c shows a part of the assembly of the handle device according to the invention in a side view,
Fig. 7a ein Steuermittel der erfindungsgemƤƟen Handgriffvorrichtung in einer schematischen Darstellung, Ā 7a shows a control means of the handle device according to the invention in a schematic representation,
Fig. 7b das Steuermittel der erfindungsgemƤƟen Handgriffvorrichtung in einer Fig. 7b, the control means of the handle device according to the invention in a
Schnittdarstellung, Ā Sectional view
Fig. 7c das Steuermittel der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā Fig. 7c, the control means of the handle device according to the invention in a
Schnittdarstellung, Ā Sectional view
Fig. 8a einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā 8a shows a detail of the handle device according to the invention in one
Schnittdarstellung, Ā Sectional view
Fig. 8b einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā 8b shows a detail of the handle device according to the invention in one
Schnittdarstellung, Ā Sectional view
Fig. 8c einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung wƤhrend einer Montage in einer Schnittdarstellung, Ā 8c shows a detail of the handle device according to the invention during assembly in a sectional view,
Fig. 9 einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer schematischen Darstellung, 9 is a detail of the handle device according to the invention in a schematic representation,
Fig. 10 einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Fig. 10 shows a detail of the handle device according to the invention in a
Schnittdarstellung, Fig. 1 1 einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einerSectional view Fig. 1 1 a detail of the handle device according to the invention in a
Schnittdarstellung entlang der Schnittlinie Xl-Xl, Sectional view along the section line Xl-Xl,
Fig. 12a einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā 12a shows a detail of the handle device according to the invention in one
Schnittdarstellung, Ā Sectional view
Fig. 12b einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā Fig. 12b shows a detail of the handle device according to the invention in one
Schnittdarstellung, Ā Sectional view
Fig. 13 einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā Fig. 13 shows a detail of the handle device according to the invention in one
Explosionsdarstellung, Ā Exploded
Fig. 14a einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā 14a shows a detail of the handle device according to the invention in one
Schnittdarstellung, Ā Sectional view
Fig. 14b einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā Fig. 14b shows a detail of the handle device according to the invention in one
Schnittdarstellung entlang der Schnittlinie XIVb-XIVb und Ā Sectional view along the section line XIVb-XIVb and
Fig. 15 einen Ausschnitt der erfindungsgemƤƟen Handgriffvorrichtung in einer Ā Fig. 15 shows a detail of the handle device according to the invention in a
Schnittdarstellung. Ā Sectional view.
Beschreibung der AusfĆ¼hrungsbeispiele Description of the embodiments
Figur 1 zeigt eine schematische Ansicht eines Bohr- und/oder MeiƟelhammers als Beispiel einer Handwerkzeugmaschine 10 mit einem MaschinengehƤuse 20, einem am MaschinengehƤuse 20 beweglich angeordneten Werkzeughalter 54 zur wechselbaren Aufnahme eines Einsatzwerkzeugs 16 und mit einer im MaschinengehƤuse 20 aufgenommenen, eine Antriebseinheit und eine Getriebeeinheit aufweisenden Antriebsvorrichtung 14 zum Antrieb des Einsatzwerkzeugs 16 in unterschiedlichen Betriebsarten. Der Werkzeughalter 54 ist dabei vorzugsweise an einer Stirnseite des MaschinengehƤuses 20 drehbar angeordnet. An einer der Stirnseite des MaschinengehƤuses 20 gegenĆ¼berliegenden Seite des MaschinengehƤuses 20 ist im Beispiel nach Figur 1 weiters eine Handgriffvorrichtung vorgesehen. Die Handgriffvorrichtung umfasst im vorliegenden Beispiel einen SchalterbetƤtiger 24 zu einer Inbetriebnahme des Bohr- und/oder MeiƟelhammers. Der SchalterbetƤtiger 24 kann sowohl mono-stabil als auch bi-stabil zwischen zwei Schaltpositionen geschaltet werden. Weiters ist am MaschinengehƤuse 20 des Bohr- und/oder MeiƟelhammers eine Zusatzhandgriffvorrichtung 56 angeordnet, insbesondere verstellbar angeordnet. Die Handwerkzeugmaschine 10 weist eine Betriebsartenumschaltvorrichtung 12 auf. DarĆ¼ber hinaus ist am MaschinengehƤuse 20 ein Bedienhebei fĆ¼r eine Betriebsartenumschaltung angeordnet, mit welchem ein Bediener zwischen verschiedenen Antriebsarten fĆ¼r das im Werkzeughalter 54 eingesetzte Einsatzwerkzeug 16 wƤhlen kann. 1 shows a schematic view of a drill and / or chisel hammer as an example of a hand tool 10 with a machine housing 20, a tool holder 54 movably mounted on the machine housing 20 for exchangeable reception of an insert tool 16 and with a housing 20 accommodated in the machine housing, a drive unit and a gear unit having drive device 14 for driving the insert tool 16 in different modes. The tool holder 54 is preferably rotatably arranged on an end face of the machine housing 20. On one of the front side of the machine housing 20 opposite side of the machine housing 20, a handle device is further provided in the example of Figure 1 further. The handle device comprises in the present example a switch actuator 24 for commissioning the drill and / or chisel hammer. The switch actuator 24 can be switched both monostable and bi-stable between two switching positions. Furthermore, an additional handle device 56 is arranged on the machine housing 20 of the drill and / or chisel hammer, in particular arranged adjustable. The hand tool 10 has an operating mode switching device 12. In addition, a Bedienhebei for a mode switch is arranged on the machine housing 20, with which an operator can choose between different drive types for the insert tool 16 used in the tool holder 54.
Die Handgriffvorrichtung fĆ¼r die Handwerkzeugmaschine 10 umfasst ein Federelement 18 und eine an dem MaschinengehƤuse 20 zumindest begrenzt beweglich angebrachten Handgriffeinheit 22, welche Ć¼ber das Federelement 18 gegenĆ¼ber dem MaschinengehƤuse 20 schwingungsentkoppelt ist und den SchalterbetƤtiger 24 zu einer Inbetriebnahme der Antriebsvorrichtung 14 umfasst. Die Handgriffeinheit 22 umfasst einen Antivibrationshandgriff 58. Die Handwerkzeugmaschinenvorrichtung weist ferner ein Steuermittel 28 auf, Ć¼ber das der SchalterbetƤtiger 24 mit der Betriebsartenumschalt- vorrichtung 12 derart zusammenwirkt, dass in bestimmten Betriebsarten der The handle device for the power tool 10 comprises a spring element 18 and a at least limited movably mounted on the machine housing 20 handle unit 22 which is vibration-decoupled via the spring member 18 relative to the machine housing 20 and the switch actuator 24 includes a commissioning of the drive device 14. The handgrip unit 22 comprises an anti-vibration handle 58. The handheld power tool device further comprises a control means 28, via which the switch actuator 24 cooperates with the mode changeover device 12 in such a way that in certain operating modes
SchalterbetƤtiger 24 nicht bi-stabil geschaltet werden kann. Das Steuermittel 28 ist als ein Zugband 30 ausgebildet. Die u.a. in Figur 2 dargestellte Baugruppe setzt sich aus folgenden Funktionseinheiten zusammen: einer Zwischenplatte 26, dem Federelement 18 und einer Schaltschieberbaugruppe. Die Zwischenplatte 26 ist dabei das zentraleSwitch actuator 24 can not be bi-stable switched. The control means 28 is designed as a drawstring 30. The u.a. shown assembly consists of the following functional units: an intermediate plate 26, the spring element 18 and a slide valve assembly. The intermediate plate 26 is the central
Bauteil dieser Baugruppe. Ihr Aufbau ermƶglicht eine Reihe von Mƶglichkeiten fĆ¼r die einfache Umsetzung bestehender Funktionen in der von dem Hammer gebildeten Handwerkzeugmaschine 10 bei einer Verwendung des Antivibrationshandgriffs 58 und einer mechanischen SchalterbetƤtigung mit Umschaltung. Component of this module. Their structure allows a number of possibilities for the simple implementation of existing functions in the hand tool 10 formed by the hammer when using the anti-vibration handle 58 and a mechanical switch operation with switching.
Eine der zentralen Aufgaben der Zwischenplatte 26 ist die Aufnahme und FĆ¼hrung des Federelements 18, wie in den Figuren 3a und 3b dargestellt. Das Federelement 18 wird durch die Zwischenplatte 26 in den Antivibrationshandgriff 58 eingespannt und an der Einspannstelle Ć¼ber eine Kontur fixiert. Die Kontur ist dabei vorzugsweise in einer AnlageflƤche an der Zwischenplatte 26 realisiert, an welcher sich das Federelement 18 abstĆ¼tzen kann. Die Kurve dieser Kontur bestimmt Steifigkeit, Biegelinie und Wege des Federelements 18. Das Federelement 18 ist als Blattfeder 32 ausgebildet. One of the central tasks of the intermediate plate 26 is the receiving and guiding of the spring element 18, as shown in Figures 3a and 3b. The spring element 18 is clamped by the intermediate plate 26 in the anti-vibration handle 58 and fixed at the clamping point over a contour. The contour is preferably realized in a contact surface on the intermediate plate 26, on which the spring element 18 can be supported. The curve of this contour determines stiffness, bending line and paths of the spring element 18. The spring element 18 is designed as a leaf spring 32.
Des Weiteren dient die Zwischenplatte 26 der Aufnahme von oder als Anschlag fĆ¼r ein oder mehrere SekundƤrfederelemente 34, 34', 34", die als DƤmpfungselemente dienen kƶnnen. In den Figuren 4a bis 4c sind denkbare Varianten und Ausgestaltungen der SekundƤrfederelemente 34, 34', 34" dargestellt. Dabei sorgen gemƤƟ den Figuren 4a bis 4c Taschen mit AbstĆ¼tzrippen 60 und einem Rahmen 62 zusƤtzlich fĆ¼r das Einbringen von DƤmpfungselementen in die Zwischenplatte 26. Die SekundƤrfederelemente 34, 34', 34" kƶnnen dabei vorzugsweise aus Schaumstoff, einem Zellkautschuk, einemFurthermore, the intermediate plate 26 serves as a stop for or as a stop for one or more secondary spring elements 34, 34 ', 34 ", which can serve as damping elements. FIGS. 4a to 4c show conceivable variants and embodiments of the secondary spring elements 34, 34', 34 "presented. According to FIGS. 4 a to 4 c, pockets with supporting ribs 60 and a frame 62 additionally provide for the introduction of damping elements into the intermediate plate 26. The secondary spring elements 34, 34 ', 34 "can preferably be made of foam, a cellular rubber
Moosgummi, einem anderen Kunst- oder Naturschaum, Elastomer, TPE, Gummi, ei- nem Gel oder einem Ƥhnlichem elastischen Material gebildet sein. Der Grad der DƤmpfung oder Federung kann dabei zusƤtzlich Ć¼ber Volumen einzelner Kammern eingestellt werden. Durch den Rahmen 62 wird ein Verklemmen mit anderen umliegenden Bauteilen verhindert. Sponge rubber, another synthetic or natural foam, elastomer, TPE, rubber, be formed gel or a similar elastic material. The degree of damping or suspension can also be adjusted via the volume of individual chambers. The frame 62 prevents jamming with other surrounding components.
Federung und DƤmpfung werden folglich zentral Ć¼ber die Aufnahme des Federelements 18 und der SekundƤrfederelemente 34, 34', 34" in der Zwischenplatte 26 aufeinander eingestellt. Es entsteht die kompakte Baugruppe, die zu einer Vormontage vorgesehen ist und die alle wesentlichen Bauteile fĆ¼r den Wirkzusammenhang der Ent- kopplung miteinander vereint. Das Prinzip erleichtert die Abstimmung der Komponenten zur Entkopplung und erƶffnet darĆ¼ber hinaus die Mƶglichkeit, durch Weglassen der Baugruppe ohne groƟen Aufwand einen starren Handgriff der Handgriffeinheit 22 ohne Umschaltung daraus abzuleiten. Die besondere Ausgestaltung der Zwischenplatte 26 ermƶglicht ferner eine verbesserteSuspension and damping are consequently adjusted to one another centrally via the reception of the spring element 18 and the secondary spring elements 34, 34 ', 34 "in the intermediate plate 26. The result is the compact assembly which is intended for pre-assembly and which comprises all essential components for the operative connection of the The principle facilitates the tuning of the components for decoupling and also makes it possible to derive a rigid handle of the handle unit 22 without switching from it by omitting the assembly without great effort
FĆ¼hrung der Handwerkzeugmaschine 10 und insbesondere eine verbesserte Ɯbertragung von BedienkrƤften am Antivibrationshandgriff 58 auf das MaschinengehƤuse 20 der Handwerkzeugmaschine 10. Nach Figur 5 sind dazu im oberen Bereich eines HandgriffgehƤuses 64 sowie an der Anbindung zu der eine Motorbaugruppe umfas- senden Antriebsvorrichtung 14 StĆ¼tzstellen und Aufnahmen der Zwischenplatte 26 so gestaltet, dass entlang dem Kraftfluss aus dem Antivibrationshandgriff 58 Bedien krƤfte ungefiltert bzw. ungefedert auf die Handwerkzeugmaschine 10 Ć¼bertragen werden kƶnnen. Daraus ergibt sich eine gute BedienfĆ¼hrung der Handwerkzeugmaschine 10. Die Zwischenplatte 26 ist im MaschinengehƤuse 20 vorgesehen und nimmt das Federelement 18 einseitig auf. SchlieƟlich wird in der Zwischenplatte 26 die Schaltschieberbaugruppe aufgenommen Die Schaltschieberbaugruppe besteht dabei gemƤƟ den Figuren 6a bis 6c aus einem Schaltschieber 66, dem Zugband 30 und einer Kompensationsfeder 68. Sie bildet neben der Zwischenplatte 26 eine weitere wichtige Einheit speziell bei der Ɯbertragung von Schalt- bzw. Umschaltwegen zum SchalterbetƤtigerGuiding the power tool 10 and in particular an improved transmission of operating forces on the anti-vibration handle 58 on the machine housing 20 of the power tool 10. According to Figure 5 are in the upper region of a handle housing 64 and at the connection to the motor assembly comprising drive device 14 support points and recordings of Intermediate plate 26 designed so that along the power flow from the anti-vibration handle 58 operating forces unfiltered or unsprung can be transferred to the power tool 10. This results in a good control of the manual power tool 10. The intermediate plate 26 is provided in the machine housing 20 and receives the spring element 18 on one side. Finally, in the intermediate plate 26, the slide valve assembly is added The slide valve assembly consists of 6a to 6c of a slide 66, the drawstring 30 and a compensation spring 68. In addition to the intermediate plate 26 forms another important unit especially in the transmission of switching or Switching paths to the switch actuator
24. Das als Zugband 30 ausgebildete Steuermittel 28 ist aus Kunststoff gefertigt. 24. The trained as a drawstring 30 control means 28 is made of plastic.
Dadurch lassen sich MaƟabhƤngigkeiten, welche sich auf Wege der Betriebsartenum- schaltung vom SchalterbetƤtiger 24 auswirken, in nur einem Bauteil regulieren. Es wird wenig Bauraum benƶtigt. Die Montage ist einfach. Die verbreiterte Kopfauflage amAs a result, it is possible to regulate dimensional dependencies, which affect the mode of operation of the switch actuator 24, in only one component. It takes little space. The assembly is easy. The widened headrest at the
Schaltschieber 66 gepaart mit SprĆ¼ngen/Stufen in der FĆ¼hrung verhindert einen Staubeinschluss zwischen GleitflƤchen. Dadurch kann eine Fehlfunktion durch Klemmen am Schaltschieber 66 grundsƤtzlich vermieden werden. Slide valve 66 paired with jumps / steps in the guide prevents one Dust enclosure between sliding surfaces. As a result, a malfunction can be avoided by clamping on the slide valve 66 in principle.
Der z-fƶrmige, gekrƶpfte Schaltschieber 66 lƤsst sich mit einer einfachen Schiebebe- wegung in die Zwischenplatte 26 hinein schieben und verrastet Ć¼ber eine nicht nƤher dargestellte Schnapphakenverbindung in der vorgesehenen Einbaulage. Es ist ferner denkbar, dass sich der z-fƶrmige, gekrƶpfte Schaltschieber 66 mit einer einfachen Schwenkbewegung in die Zwischenplatte 26 hinein drehen lƤsst. Das LƤngenverhƤltnis der FĆ¼hrungsflƤchen untereinander sorgt fĆ¼r ausreichend Vorzentrierung wƤhrend der gesamten Vormontage. Eine Fehlmontage ist dadurch ausgeschlossen. The z-shaped, cranked slide switch 66 can be pushed into the intermediate plate 26 with a simple sliding movement and locked in place by means of a snap hook connection, not shown, in the intended installation position. It is also conceivable that the z-shaped, cranked slide switch 66 can rotate into the intermediate plate 26 with a simple pivoting movement. The aspect ratio of the guide surfaces ensures sufficient pre-centering during the entire pre-assembly. A wrong assembly is thereby excluded.
FĆ¼r eine betriebsartenabhƤngige Umschaltung vom Hammerschalter gemƤƟ der Druckschrift DE 197 20 947 A1 , auf deren Offenbarung an dieser Stelle explizit verwiesen wird, mĆ¼ssen der Weg und die Kraft von einem Bedienhebel stƶrungsfrei mecha- nisch auf einen Umschalter vom SchalterbetƤtiger im Handgriff Ć¼bertragen werden. InFor a mode-dependent switching from the hammer switch according to the publication DE 197 20 947 A1, the disclosure of which is explicitly made at this point, the path and the force must be transmitted from a control lever trouble-free mechanically to a switch from the switch operator in the handle. In
Kombination mit einem Antivibrationshandgriff erschlieƟen sich LƶsungsansƤtze Ƥhnlich der Druckschrift DE 10 2010 038 753 A1 , bei der ein Zugband in der neutralen Faser der Handgriffbewegung angeordnet wird. Reibungsverluste, Verformung des Federelements 18 sowie Aspekte aus dem Her- stellprozess machen eine Umsetzung dieses Konzepts in der Praxis allerdings schwierig. Combination with an anti-vibration handle opens up approaches similar to the document DE 10 2010 038 753 A1, in which a tension band is arranged in the neutral fiber of the handle movement. Frictional losses, deformation of the spring element 18 and aspects of the manufacturing process, however, make it difficult to implement this concept in practice.
Aus diesem Grund sind fĆ¼r die AusfĆ¼hrung des Zugbands 30 speziell Werkstoff und Geometrie entscheidend. Als Werkstoff bietet Kunststoff sehr vielfƤltige Variationen, um niedrige Reibwerte mit guten Notlaufeigenschaften und geringer StaubanfƤlligkeit zu vereinen. Deshalb ist ein Kunststoff grundlegend fĆ¼r diese Anwendung ein sehr geeigneter Werkstoff. Um ausreichend Steifigkeit fĆ¼r die Ɯbertragung von ZugkrƤften zu erreichen, ohne gleichzeitig an FlexibilitƤt fĆ¼r eine Mitnahme Ć¼ber das Federelement 18 zu verlieren, sind QuerschnittverhƤltnisse bestimmend. For this reason, especially the material and geometry are crucial for the execution of the drawstring 30. As a material, plastic offers a great variety of variations in order to combine low friction values with good emergency running properties and low dust susceptibility. Therefore, a plastic is fundamentally a very suitable material for this application. In order to achieve sufficient rigidity for the transmission of tensile forces, while at the same time lose flexibility for a driving on the spring element 18, cross-sectional conditions are determining.
Ein Bandquerschnitt des Zugbands 30 muss sehr flach in der Hƶhe und dafĆ¼r lang in die Breite verlaufen. In der vorliegenden Konstruktion wurde ein Rechteckquerschnitt mit einem SeitenverhƤltnis von 1 :10 kombiniert mit einer im Wesentlichen kreisƤhnli- - l o chen, insbesondere kreisrunden, Mittelfaser gewƤhlt (siehe Figuren 7a bis 7c), es kƶnnen jedoch auch Querschnitte mit abgerundeten Ecken und/oder abweichenden SeitenverhƤltnissen, insbesondere im Bereich zwischen 1 :2 bis 1 :20, besonders bevorzugt von 1 :5 bis 1 :15 von Vorteil sein. A band cross section of the tension band 30 must be very flat in height and long in the width. In the present construction, a rectangular cross-section with an aspect ratio of 1:10 was combined with a substantially circle-like - lo chen, in particular circular, medium fiber chosen (see Figures 7a to 7c), but it can also cross sections with rounded corners and / or different aspect ratios, in particular in the range between 1: 2 to 1: 20, particularly preferably from 1: 5 to 1: 15 be beneficial.
FlƤchenanteile sind Ć¼ber die gesamte LƤnge des Zugbands 30 variabel einstellbar, mĆ¼ssen in der Summe jedoch ausgeglichen bleiben. Dadurch wird trotz Ɩsen und Um- lenkung im Einsatz eine immer gleich bleibende Spannung im Zugband 30 aufrechterhalten. Es kann eine gleichfƶrmige Beanspruchung des Werkstoffs sichergestellt wer- den. Area shares are variably adjustable over the entire length of the drawstring 30, but must remain balanced in total. As a result, in spite of eyelets and deflection in use, an always constant tension in the tension band 30 is maintained. It is possible to ensure uniform loading of the material.
Zwischen Steifigkeit und FlexibilitƤt hilft auch die Variation der FlƤchenanteile. Der im Wesentlichen kreisƤhnliche, insbesondere kreisrunde Anteil dient zum FĆ¼llen der Form im Herstellprozess und erhƶht gleichzeitig vorteilhaft die Festigkeit. Between stiffness and flexibility also helps the variation of the area proportions. The substantially circle-like, in particular circular portion serves to fill the mold in the manufacturing process and at the same time advantageously increases the strength.
Aufgrund von Herstelltoleranz, thermisch-elastischen LƤngenƤnderungen, Schwindung/Nachkristallisierung und dem ausgeprƤgten FlieƟverhalten von Kunststoff unter Belastung des Zugbands 30, summieren sich bei der Ɯbertragung der ZugkrƤfte und Wege am Zugband 30, das aus Kunststoff gefertigt ist, Differenzen auf, die eine siche- re und zufriedenstellende Funktion des SchalterbetƤtigers 24 auf mechanischem Wege nur bedingt gewƤhrleisten. Due to manufacturing tolerance, thermal-elastic length changes, shrinkage / recrystallization and the pronounced flow behavior of plastic under load of the tension band 30, add up in the transmission of tensile forces and paths on the drawstring 30, which is made of plastic, differences that a secure re and satisfactory function of the switch actuator 24 by mechanical means only partially ensure.
Mit Hilfe der Kompensationsfeder 68 (siehe Figur 6a) kƶnnen diese Schwierigkeiten einfach gelƶst werden. With the help of the compensation spring 68 (see Figure 6a), these difficulties can be solved easily.
In der Vorspannung der Kompensationsfeder 68 wird durch die Einbausituation im Schaltschieber 66 ein Puffer geschaffen, der alle UnschƤrfen aus Herstellung und mechanischem Verhalten des Zugbands 30, das aus Kunststoff gefertigt ist, ausgleichen kann. In the bias of the compensation spring 68, a buffer is created by the installation situation in the slide valve 66, which can compensate for any blurring of manufacture and mechanical behavior of the tension band 30, which is made of plastic.
Das Zugband 30 muss dafĆ¼r einen Korpus zur Aufnahme der Kompensationsfeder 68 haben und mit Hilfe von zwei Drehaufnahmen sicher im Schaltschieber 66 aufgenommen/gefĆ¼hrt werden. Der Schaltschieber 66 stĆ¼tzt die Kompensationsfeder 68 auf der Gegenseite ab und bestimmt Ć¼ber die EinbaulƤnge das MaƟ fĆ¼r den Ausgleich. Bei BetƤtigung der Umschaltung wird der Weg vom Schaltschieber 66 nun kraftabhƤngig auf das Zugband 30 und den SchalterbetƤtiger 24 Ć¼bertragen (siehe Figuren 8a und 8b). Die Kopplung ist nicht mehr starr sondern linear-elastisch. Die Wege zwischen Schaltschieber 66 und Umschalthebel am SchalterbetƤtiger 24, der einen Hammer- Schalter bildet, sind darauf ausgelegt, dass in der Kompensationsfeder 68 immer eineThe drawstring 30 must have a body for receiving the compensation spring 68 and safely taken up with the help of two rotational recordings in the slide valve 66 / performed. The slide valve 66 supports the compensation spring 68 on the opposite side and determines the measure of the compensation over the installation length. Upon actuation of the switching, the path from the slide valve 66 is now transmitted force-dependent on the drawstring 30 and the switch actuator 24 (see Figures 8a and 8b). The coupling is no longer rigid but linear-elastic. The paths between the slide valve 66 and switching lever on the switch actuator 24, which forms a hammer switch, are designed so that in the compensation spring 68 is always a
Reserve vorgehalten bleibt. Diese Reserve aus der LƤnge der Kompensationsfeder 68 im Betrieb kann fĆ¼r einen Toleranzausgleich und Ausgleich thermischer, elastischer wie auch plastischer LƤngenƤnderungen am Zugband 30, das aus Kunststoff gefertigt ist, genutzt werden. Es wird ein Ɯberlastschutz sichergestellt und Ć¼ber die Kompensa- tionsfeder 68 nun definiert ZugkrƤfte auf das Zugband 30 aufgebracht. Reserved reserve. This reserve from the length of the compensation spring 68 in operation can be used for tolerance compensation and compensation of thermal, elastic as well as plastic changes in length on the drawstring 30, which is made of plastic. An overload protection is ensured and tensile forces are now applied to the tension band 30 via the compensation spring 68.
FĆ¼r eine einfache Montage wurde am Schaltschieber vorne eine Ɩffnung in der FĆ¼hrung gelassen und dem Zugband 30 eine Schnappverbindung spendiert, d.h. vorgesehen (siehe Figur 8c). Das Zugband 30 ist in der Breite auf die Aufnahme im Schalt- Schieber 66 abgestimmt. Dadurch lƤsst sich das Zugband 30 samt Kompensationsfeder 68 einfach durch die Aufnahme im Schaltschieber 66 hindurchfƤdeln. Ɯber die Kraft in vorgesehener Zugrichtung werden die Bauteile anschlieƟend automatisch in ihre Einbaulage gezogen und bleiben darin gesichert. FĆ¼r einen effektiven Staubschutz ist Ć¼ber die Zwischenplatte 26 weiters ein LabyrinthFor ease of assembly, an opening in the guide has been left on the slide switch at the front and the pull strap 30 has been snap-fitted, i. provided (see Figure 8c). The drawstring 30 is tuned in width to the inclusion in the switching slide 66. As a result, the tension band 30 together with the compensating spring 68 can simply be threaded through the receptacle in the slide switch 66. The components are then automatically pulled into their installed position via the force in the intended direction of pull and remain secured therein. For effective dust protection is on the intermediate plate 26 further a labyrinth
70 vorgesehen, welches zur Abdeckung des ein SchlagwerkgehƤuse und einen GehƤusedeckel umfassenden MaschinengehƤuses 20, der eine Motorbaugruppe umfassenden Antriebsvorrichtung 14 und des Antivibrationshandgriffs 58 nach innen hinein erreicht (siehe Figur 9). Das Labyrinth 70 greift an den ƜbergƤngen in die umlie- genden Teile hinein und sorgt speziell bei der Umschaltung des vom Hammerschalter gebildeten SchalterbetƤtigers 24 wirkungsvoll fĆ¼r Staubschutz und einen sicheren Betrieb. ZusƤtzliche Dichtelemente sind dadurch nicht erforderlich. 70 is provided, which for covering a percussion gear housing and a housing cover comprising a machine housing 20, the engine assembly comprising a drive device 14 and the anti-vibration handle 58 inwardly reached (see Figure 9). The labyrinth 70 engages the transitions into the surrounding parts and, especially during the switchover of the switch actuator 24 formed by the hammer switch, effectively ensures dust protection and safe operation. Additional sealing elements are not required.
Ein weiterer Aspekt der Erfindung betrifft den Umstand, dass bei grĆ¶ĆŸeren und leis- tungsfƤhigeren Handwerkzeugmaschinen 10, wie z.B. bei schweren Bohr- und Another aspect of the invention relates to the fact that for larger and more powerful hand tool machines 10, such as e.g. in heavy drilling and
MeiƟelhƤmmern, die oben beschriebene Fixierung der Blattfeder 32 zwischen dem Antivibrationshandgriff 58 und dem MaschinengehƤuse 20 nicht mehr ausreicht. Beispielsweise reicht hier die Blattfeder 32 als alleiniges Federelement nicht mehr aus. Es mĆ¼ssen noch zusƤtzliche SekundƤrfederelemente 34 zwischen dem MaschinengehƤu- se 20 und der Blattfeder 32 eingebracht werden, um die zu weiche Blattfeder 32 in ih- rer Federwirkung zu unterstĆ¼tzen. Die SekundƤrfederelemente 34 sind jeweils von einem Elastomerfederelement 36 gebildet. Chisel hammers, the above-described fixation of the leaf spring 32 between the anti-vibration handle 58 and the machine housing 20 is no longer sufficient. For example, here, the leaf spring 32 is no longer sufficient as the sole spring element. Additional secondary spring elements 34 have to be introduced between the machine housing 20 and the leaf spring 32 in order to prevent the too soft leaf spring 32 in its ih- to support spring action. The secondary spring elements 34 are each formed by an elastomeric spring element 36.
GemƤƟ der Druckschrift DE 10 2006 029 630 A1 kann die Blattfeder durch ein KlemmstĆ¼ck und die Schraubplatte nur rĆ¼ckseitig funktionell bzw. mit KrƤften beaufschlagt werden. Auf der zur GerƤteseite hingewandten Seite der Blattfeder kƶnnen keine Halte- bzw. Fixierfunktionen bzw. KrƤfte eingeleitet werden. Die Erfindung stellt somit eine Erweiterung der aus der Druckschrift DE 10 2006 029 630 A1 bekannten Lƶsung dar, um das dort vorgestellte Antivibrations-Handgriffkonzept auch bei grĆ¶ĆŸeren und leistungsfƤhigeren Handwerkzeugmaschinen umsetzen zu kƶnnen. According to the document DE 10 2006 029 630 A1, the leaf spring can be acted upon by a clamping piece and the screw plate only on the back side functionally or with forces. On the side of the leaf spring facing the device side, no holding or fixing functions or forces can be introduced. The invention thus represents an extension of the known from the document DE 10 2006 029 630 A1 solution to implement the presented there anti-vibration handle concept even with larger and more powerful hand tool machines can.
Der vom Bediener gehaltene Antivibrationshandgriff 58 beinhaltet den als Ein- Aus- Schalter ausgebildeten SchalterbetƤtiger 24 und wird durch Verschrauben einer Griff- schale des Antivibrationshandgriffs 58 nach hinten hin abgeschlossen. The operator-held anti-vibration handle 58 includes the switch actuator 24 formed as an on-off switch, and is closed by screwing a handle of the anti-vibration handle 58 backward.
Oben ist die Blattfeder 32 zwischen dem Antivibrationshandgriff 58 und zwei Schraubplatten 48 eingespannt. Die beiden Schraubplatten 48 werden in Querrichtung beidseitig auf die Blattfeder 32 aufgeschoben. Die Schraubplatten 48 umschlieƟen somit einen oberen Klemmbereich 50 der Blattfeder 32 bis auf die Anlagezone zum Antivibrationshandgriff 58 hin in allen Raumrichtungen. Dies gewƤhrleistet eine dauerhafte und stabile Einfassung der Blattfeder 32. In den Schraubplatten 48 befinden sich Schraubdome 52, die zur Verschraubung der Schraubplatten 48 und damit einer der Blattfeder 32 mit dem Antivibrationshandgriff 58 dienen. Die Schraubplatten 48, die Blattfeder 32, der Antivibrationshandgriff 58 und ein verspannter Faltenbalg 72 bilden ein Befestigungssystem, das Ć¼ber Form- und Kraftschluss vorteilhaft zusammengehalten wird. Der Formschluss wird Ć¼ber einander gegenseitig abstĆ¼tzende und durchdringende Haltedome und Rippen gebildet, so dass der Kraftschluss nur eine fixierende Funktion hat und die wesentlichen KrƤfte durch den Formschluss der Bauteile aufgenommen werden. At the top, the leaf spring 32 is clamped between the anti-vibration handle 58 and two screw plates 48. The two screw plates 48 are pushed in the transverse direction on both sides of the leaf spring 32. The screw plates 48 thus enclose an upper clamping region 50 of the leaf spring 32 up to the contact zone to the anti-vibration handle 58 in all spatial directions. This ensures a durable and stable enclosure of the leaf spring 32. In the screw 48 are screw dome 52, which serve for screwing the screw 48 and thus one of the leaf spring 32 with the anti-vibration handle 58. The screw 48, the leaf spring 32, the anti-vibration handle 58 and a strained bellows 72 form a fastening system, which is held together advantageously on form and frictional connection. The positive connection is formed by mutually supporting and penetrating retaining domes and ribs, so that the adhesion has only a fixing function and the essential forces are absorbed by the positive connection of the components.
Ein wesentlicher Vorteil der beidseitig aufgeschobenen Schraubplatten 48 ist die Schaffung von zusƤtzlichen FunktionsflƤchen vor einem Bereich und seitlich eines Bereichs der Schraubplatten 48 der Blattfeder 32. A significant advantage of the screw plates 48 pushed on both sides is the provision of additional functional surfaces in front of a region and laterally of a region of the screw plates 48 of the leaf spring 32.
Im vorderen Bereich sind die Schraubplatten 48 so ausgebildet, dass sie die zusƤtzlichen SekundƤrfederelemente 34 aufnehmen kƶnnen. Neben Federaufnahmen haben die Schraubplatten 48 noch zusƤtzliche Funktionen. Um ein HerausreiƟen des Antivib- rationshandgriffs 58 und damit auch eine Ɯberlastung der Blattfeder 32 zu verhindern, besitzen die Schraubplatten 48 seitliche AnlageflƤchen, welche sich rĆ¼ckseitig an zwei, als GehƤuserĆ¼ckplatten ausgebildeten RĆ¼ckplatten 38 abstĆ¼tzen. Dadurch besitzt der Antivibrationshandgriff 58 einen stabilen und definierten rĆ¼ckseitigen Anschlag. Eine weitere Funktion der Schraubplatten 48 ist das seitliche FĆ¼hren und das Abdecken des von dem Zugband 30 gebildeten Steuermittels 28 gegenĆ¼ber dem aus einem In the front region, the screw plates 48 are formed so that they can accommodate the additional secondary spring elements 34. In addition to spring shots have the screw 48 even more features. In order to prevent tearing out of the anti-vibration handle 58 and thus also overloading of the leaf spring 32, the screw plates 48 have lateral abutment surfaces which are supported on the back on two rear plates 38 designed as housing rear plates. As a result, the anti-vibration handle 58 has a stable and defined back stop. Another function of the screw 48 is the lateral guiding and covering the control means 28 formed by the tension band 30 relative to that of a
Elastomer gebildeten SekundƤrfederelement 34. Mit dem Zugband 30 wird der von dem Ein-Aus-Schalter gebildete SchalterbetƤtiger 24 wƤhrend eines MeiƟeins blo- ckiert, so dass der Bediener den SchalterbetƤtiger 24 nicht stƤndig drĆ¼cken muss. DasElastomer formed secondary spring element 34. With the drawstring 30 of the switch actuator 24 formed by the on-off switch is blocked during a MeiƟeins, so that the operator does not press the switch actuator 24 constantly. The
Zugband 30 muss leichtgƤngig auf der Blattfeder 32 gleiten kƶnnen und darf nicht verklemmt oder eingeklemmt werden. Tieback 30 must be able to slide smoothly on the leaf spring 32 and must not be jammed or pinched.
WƤhrend des Zusammenschiebens der beiden Schraubplatten 48 auf die Blattfeder 32 wird das Zugband 30 in einem Schacht der Schraubplatten 48 gekammert. Auch derDuring the pushing together of the two screw plates 48 on the leaf spring 32, the tension band 30 is chambered in a slot of the screw 48. Also the
Faltenbalg 72 wird durch die Schraubplatten 48 im Antivibrationshandgriff 58 gekammert. Weiterhin bilden die Schraubplatten 48 auch den Endanschlag in LƤngsund Hochrichtung des Antivibrationshandgriffs 58. Die untere Blattfederklemmung ist in die Verschraubungssystematik der RĆ¼ckplattenBellows 72 is chambered by the screw plates 48 in the anti-vibration handle 58. Furthermore, the screw 48 also form the end stop in the longitudinal and vertical direction of the anti-vibration handle 58. The lower Blattfederklemmung is in the screw system of the back plates
38 zum MaschinengehƤuse 20 vorteilhaft integriert worden (siehe Figuren 14a und 14b). Die vormals einteilige RĆ¼ckplatte wurde in zwei spiegelsymmetrische RĆ¼ckplatten 38 geteilt, um alle geforderten Funktionen, gĆ¼nstige Montierbarkeit und Werkzeugend- formbarkeit erfĆ¼llen zu kƶnnen. 38 has been advantageously integrated into the machine housing 20 (see FIGS. 14a and 14b). The previously one-piece backplate was split into two mirror-symmetrical backplates 38 in order to fulfill all required functions, favorable mountability and mold endformability.
Wie schon bei der Druckschrift DE 10 2006 029 630 A1 werden bei der Montage durch Zusammenschieben der beiden RĆ¼ckplatten 38 die bereits auf den Antivibrationshandgriff 20 montierten FaltenbƤlge 72 und Kipphebel (ohne Darstellung) gekammert. Aufgrund der erforderlichen Vorspannung der Blattfeder 32 steht die Blattfeder 32 dann ein bisschen von den als GehƤuserĆ¼ckplatten ausgebildeten RĆ¼ckplatten 38 ab. Um die Blattfeder 32 bei der Montage einfach in ihre Betriebsstellung drĆ¼cken zu kƶnnen, wird eine Federplatte 40 oben mit ihren zwei Halterippen 42 in zwei korrespondierende Haltenuten 44 der als GehƤuserĆ¼ckplatten ausgebildeten RĆ¼ckplatten 38 eingelegt und dann entgegen einer Blattfederspannung in Richtung der RĆ¼ckplatten 38 nach hinten umgelegt. Um diese Stellung halten zu kƶnnen, sind in den RĆ¼ckplatten 38 zweiAs with the document DE 10 2006 029 630 A1, the bellows 72 already mounted on the anti-vibration handle 20 and the rocker arms (not shown) are chambered during assembly by pushing the two back plates 38 together. Due to the required bias of the leaf spring 32, the leaf spring 32 is then a bit of the back plates designed as housing rear plates 38 from. In order to simply press the leaf spring 32 in its operating position during assembly, a spring plate 40 is inserted above with its two retaining ribs 42 in two corresponding retaining grooves 44 formed as housing rear plates back plates 38 and then folded against a leaf spring tension in the direction of the back plates 38 to the rear , In order to hold this position, two are in the back plates 38
Schnapphaken 46 integriert, welche in die Federplatte 40 einrasten und diese in der Montagestellung halten. Die so vormontierte komplette, als Handgriffbaugruppe ausgebildete Handgriffvorrichtung kann dann in einer Montagelinie auf das KerngerƤt appliziert werden. Snap hook 46 integrates, which engage in the spring plate 40 and these in the Keep assembly position. The thus pre-assembled complete, designed as a handle assembly handle device can then be applied in an assembly line on the core device.
Zur Klemmung der Blattfeder 32 werden sowohl kraft- als auch form schlĆ¼ssige Elemente verwendet. Als Formschluss besitzt die Blattfeder 32 an ihrem unteren Ende zwei DurchbrĆ¼che und eine Abfalzung 74. Die Blattfeder 32, die Federplatte 40 und das MaschinengehƤuse 20 sind auf zwei Dome der jeweiligen Seite der von den GehƤuserĆ¼ckplatten gebildeten RĆ¼ckplatten 38 aufgefƤdelt. Weiterhin umgreift die Federplatte 40 auch die beiden Schraubdome des MaschinengehƤuses 20. Die Abfalzung 74 der Blattfeder 32 wird zwischen den RĆ¼ckplatten 38 und der Federplatte 40 verspannt. Durch Verschrauben der von den GehƤuserĆ¼ckplatten gebildeten RĆ¼ckplatten 38 mit dem MaschinengehƤuse 20 werden alle Teile miteinander verspannt. Durch die vorteilhafte Schachtelung der Bauteile ineinander entsteht eine dauerhafte Verbindung, die auch der groƟen Vibrationsbelastung in der von einem schlagenden Elektrowerk- zeug gebildeten Handwerkzeugmaschine 10 standhƤlt. For clamping the leaf spring 32 both positive and positive elements are used. As a positive connection, the leaf spring 32 has at its lower end two openings and a Abfalzung 74. The leaf spring 32, the spring plate 40 and the machine housing 20 are threaded onto two domes of the respective side of the back plates formed by the housing rear plates 38. Furthermore, the spring plate 40 engages around the two screw domes of the machine housing 20. The Abfalzung 74 of the leaf spring 32 is clamped between the back plates 38 and the spring plate 40. By screwing the rear plates 38 formed by the housing rear plates with the machine housing 20, all parts are clamped together. The advantageous nesting of the components into one another produces a permanent connection which withstands the high vibration load in the hand-held power tool 10 formed by a striking power tool.
Auch im Falle eines Vorspannungsverlusts in der Schraubverbindung aufgrund von Setz- oder LƶsungsvorgƤngen bleibt die Verbindung auf Grund des Formschlusses aufrechterhalten. Die Federplatte 40 ist in ihrer Hƶhenkontur dermaƟen gestaltet, dass die Blattfeder 32 auf ca. 25 % ihrer LƤnge unten fest eingespannt ist. Die restliche LƤnge kann beim Einfedern frei auskragen. Even in the case of a loss of preload in the screw connection due to settling or dissolution processes, the connection is maintained due to the positive connection. The spring plate 40 is designed in its contour height so that the leaf spring 32 is firmly clamped down to about 25% of its length. The remaining length can cantilever freely during compression.
Ein weiterer Erfindungsaspekt ist die Kombination der Blattfeder 32 als primƤres Federelement und des noch mindestens einen weiteren SekundƤrfederelements 34, das aber erst nach einem gewissen Einfederweg beaufschlagt wird. Another aspect of the invention is the combination of the leaf spring 32 as the primary spring element and the at least one further secondary spring element 34, which is acted upon only after a certain compression travel.
Figur 15 zeigt einen Querschnitt durch den oberen Bereich des Antivibrationshandgriffs 58 mit der Blattfeder 32 und dem SekundƤrfederelement 34. Die Schraubplatten 48, mit denen die Blattfeder 32 umschlossen ist, sind nach vorne so ausgebildet, dass sie noch das eine oder die zusƤtzlichen SekundƤrfederelemente 34 aufnehmen kƶnnen. In der gezeigten AusfĆ¼hrung wird z.B. ein geschƤumtes Elastomerformteil zwischen der Schraubplatte 48 oder der Blattfeder 32 und der Federplatte 40 eingebracht. Das Elastomerformteil ist als das Elastomerfederelement 36 ausgebildet und bildet das SekundƤrfederelement 34. GeschƤumte Elastomerformteile haben den Vorteil der kostengĆ¼nstigen Herstellung durch einen kontinuierlichen Strangspritzprozess mit anschlieƟendem AblƤngen auf die benƶtigte BaulƤnge. Weiterhin wirken sie quasi in allen Raumrichtungen, d.h. sie haben keine Vorzugsrichtung wie z.B. eine Schraubendruckfeder. FIG. 15 shows a cross-section through the upper region of the anti-vibration handle 58 with the leaf spring 32 and the secondary spring element 34. The screw plates 48, which surround the leaf spring 32, are designed to receive the one or the additional secondary spring elements 34 can. In the embodiment shown, for example, a foamed elastomer molded part between the screw plate 48 or the leaf spring 32 and the spring plate 40 is introduced. The elastomeric molded part is formed as the elastomeric spring element 36 and forms the secondary spring element 34. Foamed elastomer moldings have the advantage of cost-effective production by a continuous extrusion molding process with subsequent cutting to the required length. Furthermore, they act in virtually all directions, ie they have no preferred direction such as a helical compression spring.
Das vorteilhafte, als Elastomerfederelement 36 ausgebildete SekundƤrfederelement 34 unterstĆ¼tzt die Blattfeder 32 bei Belastungen, die oberhalb eines optimalen Betriebsandruckpunkts liegen. Der optimale Betriebsandruckpunkt ist der Mindestandruck, der vom Bediener gerade noch erbracht werden muss, damit die von dem Bohrhammer gebildete Handwerkzeugmaschine 10 einen regelmƤƟigen und sauberen Schlagbetrieb ausfĆ¼hrt. Dieser Bedienandruck ist abhƤngig von der Leistungsklasse der Handwerkzeugmaschine 10 und vom jeweiligen Einsatzfall. The advantageous, formed as Elastomerfederelement 36 secondary spring element 34 supports the leaf spring 32 at loads that are above an optimal Betriebsandruckpunkts. The optimum operating pressure point is the minimum pressure that the operator just has to provide in order for the hand tool 10 formed by the hammer to perform a regular and clean impact operation. This operating pressure is dependent on the power class of the power tool 10 and the particular application.
D.h. durch Vorsehen eines bestimmten Spiels des Elastomerfederelements 36 zwi- sehen den AnlageflƤchen wird eine mindestens zweistufige Federkennlinie erzeugt. Bis zum Betriebsandruckpunkt wirkt ausschlieƟlich die Blattfeder 32, so dass eine sehr gute Entkopplung des Antivibrationshandgriffs 58 mit einem niedrigen Vibrationsniveau erreicht werden kann. Eine gute Entkopplung wird in diesem Bereich vor allem auch deshalb erreicht, weil die Blattfeder 32 eine sehr geringe DƤmpfungskonstante hat. Bei einem ƜberdrĆ¼cken oder bei einem Fall der Handwerkzeugmaschine 10 auf den Anti- vibrationshandgriff 58 nimmt dann das Elastomerfederelement 36 den wesentlichen Anteil an Belastungen auf. That by providing a certain play of the elastomeric spring element 36 between see the contact surfaces, an at least two-stage spring characteristic is generated. Until the operating pressure point, only the leaf spring 32 acts, so that a very good decoupling of the anti-vibration handle 58 with a low vibration level can be achieved. A good decoupling is achieved in this area, especially because the leaf spring 32 has a very low damping constant. In an overpressure or in a case of the power tool 10 on the anti-vibration handle 58 then takes the elastomeric spring element 36 to the significant proportion of loads.
Es wird vorgeschlagen das die Federsteifigkeit der Blattfeder 32 so eingestellt wird, dass mit einem Einfederweg zwischen 2 mm und 10 mm, vorzugsweise zwischenIt is proposed that the spring stiffness of the leaf spring 32 is adjusted so that with a compression travel between 2 mm and 10 mm, preferably between
3 mm und 7 mm, besonders bevorzugt zwischen 4 mm und 5 mm die minimalen Betriebsandruckpunkte fĆ¼r die meisten wichtigen AnwendungsfƤlle erreicht werden. Ab dieser Andruckschwelle fƤngt das SekundƤrfederelement 34 an zu wirken. Je mehr das Volumen des Elastomerfederelements 36 bei der Einfederung verformt wird, umso stei- fer wird die Kennlinie des SekundƤrfederelements 34. Es wird deshalb weiterhin vorgeschlagen, dass eine Volumenverpressung des Elastomerfederelements 36 derart gestaltet wird, dass bei einem zusƤtzlichen Einfedern von 2 mm bis 5 mm, insbesondere von 3 mm bis 4 mm Ć¼ber den minimalen Betriebsandruckpunkt hinaus das 3 mm and 7 mm, more preferably between 4 mm and 5 mm, the minimum operating pressure points are achieved for most important applications. From this Andruckschwelle the secondary spring element 34 starts to act. The more the volume of the elastomeric spring element 36 is deformed during spring deflection, the higher is the characteristic of the secondary spring element 34. It is therefore further proposed that a volume compression of the elastomeric spring element 36 be designed such that with an additional compression of 2 mm to 5 mm, in particular from 3 mm to 4 mm beyond the minimum operating pressure point beyond the
Elastomerfederelement 36 zu 70 % seines Ausgangsvolumens komprimiert wird. Bei weiterem Einfedern von 1 mm bis 2 mm wird quasi das ganze Volumen des Elastomer spring element 36 is compressed to 70% of its original volume. With further compression of 1 mm to 2 mm, almost the entire volume of
Elastomerfederelements 36 beaufschlagt, so dass die Federsteifigkeit relativ schnell ansteigt. Dies hat den Vorteil, dass bei einem Fall auf den Antivibrationshandgriff 58 sehr viel Energie aufgenommen werden kann, so dass die stoƟartig beaufschlagten Bauteile weniger belastet werden. Eine beschriebene Einfederungscharakteristik kann auch durch eine gezielte Formgebung des Elastomerfederelements 36 bewirkt bzw. unterstĆ¼tzt werden. So kƶnnen auch schlauchfƶrmige oder sonstige in einem Strang- prozess erzeug bare Konturen verbaut werden. Das Elastomerfederelement 36 ist dabei vorzugsweise aus geschƤumten Elastomer (Moosgummi), welches in einem kontinuierlichen StrangspritzprozeƟ mit anschlieƟendem AblƤngen hergestellt wird. Elastomer spring member 36 is applied, so that the spring stiffness relatively quickly increases. This has the advantage that in a case on the anti-vibration handle 58 a lot of energy can be absorbed, so that the impact-like components are less loaded. A described compression characteristic can also be effected or supported by a targeted shaping of the elastomer spring element 36. It is thus also possible to install tubular or other contours that can be produced in an extrusion process. The elastomer spring element 36 is preferably made of foamed elastomer (sponge rubber), which is produced in a continuous extrusion molding process with subsequent cutting to length.

Claims

Handgriffvorrichtung fĆ¼r eine Handwerkzeugmaschine (10), die eine Betriebsar- tenumschaltvorrichtung (12) und eine Antriebsvorrichtung (14) zum Antrieb eines Einsatzwerkzeugs (16) in unterschiedlichen Betriebsarten aufweist, mit zumindest einem Federelement (18) und mit einer an einem MaschinengehƤuse (20) zumindest begrenzt beweglich angebrachten Handgriffeinheit (22), welche Ć¼ber das zumindest eine Federelement (18) gegenĆ¼ber dem MaschinengehƤuse (20) zumindest teilweise schwingungsentkoppeit ist und einen SchalterbetƤtiger (24) zu einer Inbetriebnahme der Antriebsvorrichtung (14) umfasst, wobei der SchalterbetƤtiger (24) sowohl mono-stabil als auch bi-stabil zwischen zwei Schaltpositionen geschaltet werden kann, gekennzeichnet durch eine Zwischenplatte (26), die im MaschinengehƤuse (20) vorgesehen ist und welche zumindest das Federelement (18) einseitig aufnimmt, und ein Steuermittel (28), Ć¼ber das der SchalterbetƤtiger (24) mit der Betriebsartenumschaltvorrichtung (12) derart zusammenwirkt, dass in bestimmten Betriebsarten der SchalterbetƤtiger (24) nicht bi-stabil geschaltet werden kann. A handle apparatus for a hand tool machine (10) having a mode changeover device (12) and a drive device (14) for driving an insert tool (16) in different modes, comprising at least one spring element (18) and one on a machine housing (20). at least a limited movably mounted handle unit (22), which is at least partially vibration decoupling via the at least one spring element (18) relative to the machine housing (20) and a switch actuator (24) for commissioning the drive device (14), wherein the switch actuator (24) both mono-stable and bi-stable can be switched between two switching positions, characterized by an intermediate plate (26) which is provided in the machine housing (20) and which accommodates at least the spring element (18) on one side, and a control means (28), via the switch actuator (24) with the operating mode switching device (12) de cooperates, that in certain modes of the switch actuator (24) can not be switched bi-stable.
Handgriffvorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Steuermittel (28) als ein Zugband (30) ausgebildet ist. Handle device according to claim 1, characterized in that the control means (28) is designed as a drawstring (30).
Handgriffvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das zumindest eine Federelement (18) von einer Blattfeder (32) gebildet wird. Handle device according to claim 1 or 2, characterized in that the at least one spring element (18) by a leaf spring (32) is formed.
Handgriffvorrichtung nach einem der vorhergehenden AnsprĆ¼che, gekennzeichnet durch mindestens ein SekundƤrfederelement (34), das von einem Handle device according to one of the preceding claims, characterized by at least one secondary spring element (34), which of a
Elastomerfederelement (36) gebildet ist. Ā Elastomer spring element (36) is formed.
5. Handgriffvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass das SekundƤrfederelement (34) erst nach einem bestimmten Einfederweg beaufschlagt wird. 5. Handle device according to claim 4, characterized in that the secondary spring element (34) is acted upon only after a certain compression travel.
6. Handwerkzeugmaschine (10), insbesondere Bohr- und/oder MeiƟelhammer, mit einer Handgriffvorrichtung nach einem der vorhergehenden AnsprĆ¼che. 6. Hand tool (10), in particular drill and / or chisel, with a handle device according to one of the preceding claims.
7. Zugband (30) einer Handgriffvorrichtung zumindest nach Anspruch 2, das aus Kunststoff gefertigt ist. 7. drawstring (30) of a handle device at least according to claim 2, which is made of plastic.
8. Zugband (30) nach Anspruch 7, gekennzeichnet durch einen im Wesentlichen rechteckigen Querschnitt mit einer im Wesentlichen kreisƤhnlichen Mittelfaser. 8. drawstring (30) according to claim 7, characterized by a substantially rectangular cross section with a substantially circular middle fiber.
EP12797722.1A 2011-09-02 2012-08-31 Handle device Active EP2750834B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011082093A DE102011082093A1 (en) 2011-09-02 2011-09-02 Handle device for a hand tool
PCT/EP2012/067035 WO2013030381A1 (en) 2011-09-02 2012-08-31 Handle device

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EP2750834A1 true EP2750834A1 (en) 2014-07-09
EP2750834B1 EP2750834B1 (en) 2022-01-19

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EP12783534.6A Active EP2750835B1 (en) 2011-09-02 2012-08-31 Hand-held power tool
EP12790435.7A Active EP2750836B1 (en) 2011-09-02 2012-08-31 Handle device
EP12809620.3A Active EP2750837B1 (en) 2011-09-02 2012-08-31 Handle device
EP12797722.1A Active EP2750834B1 (en) 2011-09-02 2012-08-31 Handle device

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EP12783534.6A Active EP2750835B1 (en) 2011-09-02 2012-08-31 Hand-held power tool
EP12790435.7A Active EP2750836B1 (en) 2011-09-02 2012-08-31 Handle device
EP12809620.3A Active EP2750837B1 (en) 2011-09-02 2012-08-31 Handle device

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EP (4) EP2750835B1 (en)
CN (3) CN103796800B (en)
DE (1) DE102011082093A1 (en)
WO (4) WO2013030380A1 (en)

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EP2813326A1 (en) * 2013-06-13 2014-12-17 HILTI Aktiengesellschaft Machine tool
JP6105454B2 (en) * 2013-11-26 2017-03-29 ę Ŗ式会ē¤¾ćƒžć‚­ć‚æ Work tools
DE102022206667A1 (en) * 2022-06-30 2024-01-04 Robert Bosch Gesellschaft mit beschrƤnkter Haftung Hand tool

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Also Published As

Publication number Publication date
WO2013030380A1 (en) 2013-03-07
EP2750837B1 (en) 2019-08-14
WO2013030381A1 (en) 2013-03-07
EP2750834B1 (en) 2022-01-19
CN103796800A (en) 2014-05-14
WO2013030377A1 (en) 2013-03-07
CN103796800B (en) 2017-02-15
EP2750836A1 (en) 2014-07-09
EP2750835A1 (en) 2014-07-09
CN103781597A (en) 2014-05-07
EP2750835B1 (en) 2022-12-28
CN103764350A (en) 2014-04-30
WO2013030382A1 (en) 2013-03-07
EP2750836B1 (en) 2020-02-26
EP2750837A1 (en) 2014-07-09
CN103764350B (en) 2016-10-26
DE102011082093A1 (en) 2013-03-07

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