EP2937188B1 - Machine-outil dotée d'un magasin d'outils intégré - Google Patents

Machine-outil dotée d'un magasin d'outils intégré Download PDF

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Publication number
EP2937188B1
EP2937188B1 EP15164715.3A EP15164715A EP2937188B1 EP 2937188 B1 EP2937188 B1 EP 2937188B1 EP 15164715 A EP15164715 A EP 15164715A EP 2937188 B1 EP2937188 B1 EP 2937188B1
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EP
European Patent Office
Prior art keywords
magazine
tool
main housing
sleeve
machine tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15164715.3A
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German (de)
English (en)
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EP2937188A2 (fr
EP2937188A3 (fr
Inventor
Huifu Chen
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.)
Grizzly Tools & Co KG GmbH
Original Assignee
Grizzly Tools & Co KG GmbH
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Publication of EP2937188A2 publication Critical patent/EP2937188A2/fr
Publication of EP2937188A3 publication Critical patent/EP2937188A3/fr
Application granted granted Critical
Publication of EP2937188B1 publication Critical patent/EP2937188B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • 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
    • B25F5/029—Construction of casings, bodies or handles with storage compartments

Definitions

  • the invention relates to a machine tool, preferably designed as a screwdriver, according to the preamble of claim 1.
  • a screwdriver is used with different screw bits, depending on how the head of the screw currently used is designed, i.e. H. depending on whether it is z. B. to Phillips screws, slotted screws, Torx screws or the like. More is.
  • German patent application DE 10 2011 082 787 A screwdriver which has a rotatable magazine body which, like the drum of a drum turret, receives different screw bits and keeps them in stock.
  • the screw bit currently used for screwing is held in a tool holder that is driven in rotation from the side.
  • the end face of the screw bit facing away from the blade of the screw bit is supported against a tool pressure pin which in turn diverts the forces transmitted to it by the screw bit into the housing of the machine tool on its side facing away from the screw bit.
  • the known screwdriver is designed so that the end of the tool pressure pin facing away from the blade can be detached from the housing, whereupon the tool pressure pin is translationally displaceable so that it can be used as a "ramrod", so to speak.
  • a machine tool in particular in the form of a hand-held machine tool, which has a main housing part, a tool holder that rotates about a working axis of rotation during operation, and a drive.
  • machine tool is used in its most general meaning and includes e.g. B. also screw robots.
  • hand machine tool stands for a machine tool operated by the user with a free hand, such as. B. a cordless screwdriver or an electric drill.
  • the said main housing part can be in one piece or consist of two or more interconnected components, mostly in the form of half or partial shells.
  • the main housing part is preferably designed in such a way that, when the machine tool is ready for screwing or drilling, it completely accommodates the drive, possibly the rechargeable battery and in any case the magazine body in its interior.
  • the main housing part also forms a pistol-like handle.
  • the machine tool according to the invention has a magazine body with tool receiving chambers for receiving different tools.
  • the machine tool according to the invention is characterized in that the magazine body can be displaced back and forth with respect to the main housing part in the direction parallel to the working axis of rotation. In this way, the magazine body can be pulled out of the main housing part in the manner of a drawer for the purpose of changing tools.
  • the magazine body moves relative to the tool pressure pin, the i. d. R. as such stands still relative to the main housing part. This pulls the currently inserted screw bit out of the rotationally drivable tool holder and conveys it back into the corresponding tool holder chamber in the magazine body.
  • the drive drives a drive shaft that extends through the magazine body.
  • the drive shaft itself has a pinion that drives the tool holder.
  • the drive shaft is detachably connected to the output shaft of the drive, the machine tool being designed such that the connection between the drive shaft and the output shaft is released when the magazine body is in the screwed position.
  • connection between the tool pressure pin and the main housing part no longer has to be a connection that can be detached and re-established countless times, but rather a connection that cannot be detached or that cannot be detached during normal operation is provided can be, leads to a substantial structural simplification of the screwdriver according to the invention.
  • operational safety is usually also improved.
  • the user may be surprised that the tool pressure pin has inadvertently not been adequately fixed on the housing again after the tool change, whereupon the screw bit suddenly yields during the next screwing process, which requires strong pressing by the tool pressure pin suddenly loosening from its inadequate anchorage. The result is uncontrolled slipping with the screwdriver.
  • the magazine body is preferably rotatably mounted in a slide, which in turn is mounted on the main housing part so as to be movable in the direction parallel to the axis of rotation with the aid of at least one sliding guide.
  • This slide can be pulled out of the main housing part in a similar way to a drawer.
  • the slide can preferably be pulled out towards the front, i.e. the side on which, in the ready-to-screw state, for example, the blade of the screw bit is located.
  • the sliding guide is an external guide or also comprises an external guide which consists of at least one and preferably at least two, ideally diametrically opposite, slide tongues that are guided on the outer surface of the main housing part.
  • an external guide on the outer surface of the main housing part has the great advantage that the guide can be designed very generously, since the inner workings of the machine do not have to be taken into account, which is supported in many places on the inside of the main housing part and therefore the one Sliding guide the space available is very limited.
  • the main housing part is preferably designed in such a way that it has at least one guide groove on its outer surface for the guiding reception of a slide tongue.
  • the guide groove and the slide tongue are ideally designed in such a way that the corresponding slide tongue extends beyond the area in which the pistol-like handle is connected to the rest of the main housing part when the machine tool is ready for screwing.
  • the machine tool is also compact when a long and extensively extendable sliding guide is implemented.
  • this at least one guide groove is designed in such a way that the slide tongue assigned to it can be pushed in from the face of the guide groove facing the blade of the screw bit.
  • the at least one guide groove forms an undercut in such a way that the guide train received by it is held by the guide groove in all directions perpendicular to its direction of movement, including, for example, in a radially outward direction.
  • Such a construction makes the sliding guide or the slide, even if it is made of plastic, insensitive to bending and torsional loads, so that the overall result is a very stable slide.
  • At least one, preferably at least two mostly metal bearing balls are held at the bottom of the at least one guide groove, mostly in a bearing socket formed in the main housing part at the corresponding point.
  • the guide tongue assigned to this guide groove rolls on these bearing balls.
  • the guide tongue runs particularly smoothly.
  • the positioning of the one or more bearing balls is preferably selected in such a way that, when the tool is ready to be screwed or drilled, they are positioned radially inward Direction lie under a section of the guide tongue marked as the main gripping surface. This results in a smooth run even if the main gripping surface is pressed firmly.
  • the at least one guide tongue has a guide groove for the ball or balls on its inside.
  • the magazine body is part of a tool magazine unit which, for its part, is preferably guided in a translationally movable manner inside the main housing part.
  • a double support results, which makes the machine tool very robust, for example against falling when the tool magazine unit is pulled out if the user has dropped the machine tool in the course of the tool change.
  • the tool magazine unit comprises a magazine sleeve and a magazine body rotatably mounted in the magazine sleeve.
  • the magazine sleeve can then easily be guided on its outer circumference opposite the inner surface of the main housing part without impairing the rotational mobility of the magazine body.
  • the machine tool comprises a coupling for coupling and uncoupling the drive shaft of the drive. Because then it becomes possible to pass the drive torque required on the side of the tool magazine unit facing away from the drive through the tool magazine unit without impairing the displaceability of the tool magazine unit. This is because the part of the shaft required for the drive that is mounted in the tool magazine unit becomes the tool magazine unit when it is pulled out unceremoniously withdrawn or uncoupled from the drive shaft of the drive and pushed back on or reconnected in the course of pushing the tool magazine unit back in.
  • the coupling is preferably designed so that it works in a purely form-fitting manner.
  • it consists of a coupling sleeve with a non-circular internal cross-section and two shaft sections to be coupled with one another with a corresponding non-circular external cross-section.
  • the coupling comprises a coupling sleeve which is mounted such that it can slide in the axial direction. This is designed in such a way that the tool magazine unit can also be pushed into the main housing part to the maximum or into its end position when the drive shaft and the coupling sleeve are positioned so that their profiles are currently not ready to engage due to different rotational positions.
  • the drive shaft cannot initially be pushed into the interior of the coupling sleeve, it nevertheless does not hinder the complete insertion of the tool magazine unit, since it cannot penetrate the coupling sleeve, but displaces it.
  • the drive shaft of the drive rotates after a short time so that the coupling sleeve can now snap onto it. This is automatically coupled when starting up.
  • the Figure 1 shows the cordless screwdriver ready to be screwed, which serves as an exemplary embodiment here.
  • the invention can also be applied to a drilling machine or to a machine tool equipped with end mills or grinding pins.
  • the carriage is 25 in Fig. 1 in its completely pushed onto the main housing part Position.
  • the slide tongue 26a extends beyond the area where the pistol grip merges into the rest of the main housing part 5a.
  • the rotationally driven tool holder 28 extends through the front plate of the slide 25 and protrudes outward over it. A screw bit is inserted into it as an example.
  • the Fig. 2 shows the same cordless screwdriver with the slide 25 completely pulled out of the main housing part 5a for the purpose of changing tools.
  • the latter can be seen through the large window of the magazine case.
  • a corresponding window is also available on the upper side of the magazine case, for the purpose to be discussed in more detail later.
  • the guide tongue 26a is accommodated in the guide groove 30a of the main housing part in such a way that it fits into the outer surface of the main housing part essentially without a step.
  • Fig. 3 shows the exact structure of an embodiment of the invention, which is designed here as a preferably battery-powered screwdriver or drill / screwdriver.
  • the main housing part 5a, 5b which is here in two parts, possibly also in several parts, can be clearly seen. It preferably comprises two half-shells which can be separated and joined perpendicularly to the direction of displacement of the slide, which will be explained in more detail later.
  • the main housing part 5a, 5b When properly assembled and ready for operation, the main housing part 5a, 5b preferably completely accommodates the drive 3 and the magazine body 7, possibly together with the magazine sleeve 9, the said components being explained in more detail below.
  • a gear 2 ideally in the form of a reduction gear, is preferably attached directly to it - in such a way that both form a firmly cohesive unit in the form of the drive 3.
  • This unit is anchored in relation to the main housing part in such a way that it can divert the forces that occur during normal work with the tool into the main housing part.
  • the transmission can be designed as a transmission with a fixed transmission ratio or as a transmission that can be switched into several gears.
  • the output shaft 4 protrudes from the transmission 2, preferably in the form of a freely cantilevered shaft stub. This has a profile on its outer circumference that matches the coupling to be explained later.
  • the output shaft 4 is kept free from the compressive forces acting in the direction of the tool's longitudinal axis during screwing or drilling.
  • the tool pressure pin 5 presses on the end face of the screw bit or drill that is currently in use, facing away from the blade or cutting edge.
  • the tool pressure pin 5 can and must absorb considerable forces, as z. B. when screwing the screw bit often has to be pressed firmly into the profile of the screw, which is designed as a cross recess, for example, if high tightening or loosening torques have to be achieved.
  • Its anchoring on the drive 3 or the gear 2 allows the forces occurring on it to be diverted more evenly into the main housing part 5a, 5b than if the tool pressure pin 5 itself is attached directly to the main housing part, which, however, initially appears conceivable in principle.
  • the tool pressure pin 5 is preferably made of metal.
  • the tool pressure pin is kept rotatable in order to keep that part of the engine power that is lost due to friction as small as possible.
  • the tool pressure pin is held on the drive in a rotationally fixed manner, for example by being pressed into a receptacle on the drive, as in FIG Fig. 3 shown.
  • the tool pressure pin has its own longitudinal axis W, which as a rule runs parallel to the axis of rotation D of the drive.
  • the tool pressure pin 5 extends through the complete magazine unit, which will be explained in more detail below, and protrudes into the inner opening of the tool holder 28 or at least as far as its rear side.
  • tool pressure pin 5 is in any case connected to the main housing part in a non-displaceable or even completely fixed manner and is in any case not movable in relation to this in the direction along its longitudinal axis W or the drive axis of rotation D.
  • the tool pressure pin 5 preferably has a magnetic or permanent magnetic tip, so that the screw bits or other rotary tools adhere to the tool pressure pin, even if the slide to be explained in more detail is pulled out to change the tool.
  • a so-called retaining ring can be seen with the reference number 6, which keeps the magazine body captured in the magazine sleeve, which will be explained in more detail below.
  • the magazine body is provided with the reference numeral 7, which in this exemplary embodiment is constructed similarly to the drum of a drum turret.
  • the magazine body 7 has a central bearing bore and around it are grouped individual tool receiving chambers for the immediate accommodation of a screw bit, a drill or something else Rotation tool.
  • the magazine body 7 is preferably made as a whole from translucent plastic material, so that it can be seen in any case whether a tool receiving chamber is equipped or not.
  • the magazine body 7 preferably has a window 8 for each receiving chamber, which allows the immediate view z. B. releases on the blade of the screw bit, which is kept in stock in the respective tool receiving chamber. In this way the user can e.g. B. quickly recognize and decide which of the different bits he wants to use.
  • bits are in the Fig. 3 also recognizable, but they are not part of the protected machine tool, since their principle can also be used, for example, where so-called bit drills are used, i.e. drills whose shank is soldered into a hexagonal coupling section or otherwise attached, similar to how you know it from a bit.
  • bit drills i.e. drills whose shank is soldered into a hexagonal coupling section or otherwise attached, similar to how you know it from a bit.
  • bit drills i.e. drills whose shank is soldered into a hexagonal coupling section or otherwise attached, similar to how you know it from a bit.
  • the magazine body 7 is rotatably mounted in a magazine sleeve 9.
  • This magazine sleeve 9 is also preferably made of plastic, but it does not have to be transparent.
  • the magazine sleeve 9 in turn has at least one window 10, through which the user in operation, for. B. when changing bits, has an immediate view and manual access to the magazine body 7 and mostly also to its window.
  • the magazine sleeve 9 is provided with at least one, preferably two, latching tongues 11, which are often diametrically opposite one another. These locking tongues are used to enable the magazine sleeve 9 to lock in its fully inserted and fully withdrawn position relative to the housing or finds a stop so that, once brought into one of the two positions (ready-to-work position or tool change position), it does not slip out of the relevant position unintentionally.
  • the magazine sleeve 9 is provided with at least one sliding stop 11a, here in the form of a single stop projection. In the installed state, this at least one sliding stop 11a prevents the magazine case from being pulled out of the main housing part 5a, 5b beyond a certain position.
  • the magazine sleeve 9 is preferably equipped with guide devices along its outer circumference, with which it implements a sliding guide together with corresponding guide devices of the main housing part.
  • These guide devices are designed in the form of at least one guide strip 12 each on one of two opposite sides, which run along corresponding guide channels 12b.
  • two guide strips 12 per side are provided, which run along guide channels 12b in the right and left main housing part 5a, 5b on the inside thereof, which can be seen at least on the left main housing part 5b.
  • the magazine sleeve 9 is equipped with a generally central bearing tube 15 from which in Fig. 3 only a part can be seen, namely the part which can be seen through the window 10 provided in the magazine sleeve 9.
  • the bearing tube 15 has on its side facing the output shaft 4 a freely cantilevered end and is connected with its opposite end to the wall section of the magazine sleeve, which partially closes the end face of the magazine sleeve.
  • the bearing tube 15 preferably has a dual function.
  • the bearing tube 15 forms with its outer circumferential surface a bearing journal on which the magazine body 7 is rotatably held.
  • the internally hollow bearing tube 15 forms with its inner circumferential surface a bearing which rotatably supports the drive shaft of the tool magazine unit, which will be described in more detail below, and which at the same time accommodates the coupling.
  • FIG. 3 the frontal drive shaft outlet 14 can be seen on the magazine sleeve 9.
  • the drive shaft outlet 14 is the end of the inner opening that passes through the drive shaft bearing tube 15.
  • a coupling sleeve 16 is inserted into the inner opening of the bearing tube 15.
  • the coupling sleeve 16 is preferably movably held in the bearing tube 15 in the direction along the axis of rotation D, the bearing tube 15 being designed so that the coupling sleeve 16 cannot leave the bearing tube 15 in the direction of the output shaft 4 of the drive.
  • the coupling sleeve is pretensioned in the direction along the axis of rotation D by a coupling spring 18 and is movable in the direction along the axis of rotation 10.
  • the clutch spring 18 is supported on the one hand on the end ring surface of the coupling sleeve 16 and on the other side on the end ring surface of the bearing sleeve 17.
  • the bearing sleeve 17 is preferably firmly connected to the inner circumference of the bearing tube 15, namely ideally by pressing or injecting into the bearing tube 15.
  • the bearing sleeve 17, which is preferably made of metal and has been pressed in in the present case, can be used to provide a better hold on its outer circumference have wedge-like teeth that cut into the bearing tube.
  • the bearing sleeve 17 rotatably accommodates the drive shaft of the tool magazine unit, which is identified here by the reference numeral 19.
  • the drive shaft 19 in turn consists preferably in one piece of a coupling pin 20, which has a non-circular circumferential profile, a preferably round shaft section 21 serving for the bearing and a pinion 22 which is preferably integrally connected to it.
  • the drive shaft 19 is connected to a bearing journal 23 with which them in working order, d. H. is mounted in a journal mount 24, which is an integral part of the carriage 25, in the state ready for screwing or drilling. The latter is because the bearing journal receptacle 24 is either pressed into a corresponding bore in the slide or is encapsulated with the material of the slide or is glued.
  • tool holder 28 which is also hollow on the inside.
  • the clear, not completely round inner cross-section of the tool holder corresponds to the outer cross-section of a bit plus the clearance that is required so that a bit can be changed without problems.
  • the tool holder is preferably connected to a one-piece molded gear that meshes with the pinion 22 of the drive shaft 19.
  • the tool holder 28 is rotatably mounted on two sides. On the one hand, it runs in a preferably metal bearing sleeve 27, which in turn is inserted in the pressure pin outlet 13 of the magazine sleeve 9, which allows the tool pressure pin 5 to pass through. Here, too, the fastening can take place by pressing in, by gluing in or by overmolding.
  • the tool holder 28 runs in a second, likewise preferably metal, bearing sleeve 29. This second bearing sleeve 29 is itself an integral part of the slide 25. It is preferably pressed into the slide 25 or encapsulated with the material of the slide 25.
  • the tool magazine unit preferably comprises the magazine body 7, the magazine sleeve 9, the coupling sleeve 16, the bearing sleeve 17, the coupling spring 18, the drive shaft 19 and the tool holder as main components.
  • the tool magazine unit is firmly connected to the carriage 25, which will be described in more detail below, e.g. B. with the help of screws.
  • the tool magazine unit together with the slide is displaced translationally relative to the tool pressure pin 5 in the direction parallel along the axis of rotation D, or preferably pulled forward out of the main housing part 5a, 5b. This results in a sequence of movements during loading that is reminiscent of the reloading movement of a pump gun.
  • the slide 25 is in turn displaceably guided on the outside of the main housing part, which here consists of the right main housing part 5a and the left main housing part 5b.
  • the slide preferably has two slide tongues that are ideally diametrically opposite one another, namely a right slide tongue 26a and a left slide tongue 26b.
  • the slide tongues 26a and 26b are preferably designed so long that they still reach over or with the main housing part with at least 40%, better at least 50% of their total length (measured in the direction parallel to the axis of rotation D) even when the magazine body is maximally pulled out of the main housing part to interact.
  • the slide tongues 26a, 26b are relatively wide measured in the circumferential direction, namely preferably at least 15 mm. In the radial direction, the slide tongues are relatively flat and are preferably predominantly not more than 5 mm thick in this direction.
  • the slide tongues 26a, 26b preferably form a drawer-like guide with the outer surface of the main housing part.
  • the guide grooves 30a and 30b are preferably dovetail-shaped or equipped with a comparable undercut.
  • the slide tongues 26a, 26b are in any case designed in such a way that they are not only guided in the respective guide groove in the direction parallel to the axis of rotation D, but are also held in the radial direction, which is the case in FIG Fig. 3 is indicated by the arrows P.
  • the slide tongues can make sense for the slide tongues to have edge strips RL which positively engage in the corresponding undercut left and right edge of the relevant outer guide groove 30a, 30b.
  • each case at least one, preferably several ball receptacles 31, which usually have the shape of a ball socket, which holds the ball, ideally without hindering its rotational mobility.
  • two ball seats 31 are provided along an alignment in each of the outer guide grooves.
  • the corresponding balls that are used in these ball seats 31 are in the Fig. 3 marked with the reference numeral 32.
  • this gripping surface is designed in the form of a number of slats which together form a double arrow which visualizes the intended displaceability of the slide 25.
  • the respective slide tongue 26a or 26b rolls on the ball or balls. Because of this, the slide tongues still run easily in the outer guide grooves when the user grabs tightly and applies a relatively large force in the radially inward direction to the slide tongues 26a, 26b.
  • a ball guide groove 33 is preferably provided on the inside of the slide tongues, in which the balls in turn roll on the inside of the slide tongues 26a, 26b.
  • the carriage 25 with its large front face plate is on the entire surface Supports the end face of the right and left main housing parts, so that the slide 25 is supported in a stable manner in the ready-to-screw position.
  • the carriage 25 does not have to transfer large pressure loads anyway, since these are transferred via the tool pressure pin 5, which is firmly supported on the gear 2.
  • slide tongues 26a, 26b generally serve, on the one hand, to improve the guidance of the slide 25 and the tool magazine unit or even to take over at least the majority of the guidance of the tool magazine unit, at least in the position enabling the tool change.
  • the magazine body 7 is preferably guided so that it can slide twice, namely on the one hand via the magazine sleeve 9 on the inside of the main housing part and on the other hand via the slide tongues 26a, 26b on the outside of the main housing part.
  • a bit, a drill or the like lies in front of the tool pressure pin 5, which is supported against the tool pressure pin 5 with its free end face facing away from the blade.
  • the tool pressure pin 5 may not rotate.
  • the tool holder 28 rotates. Since its inner profile corresponds to the outer profile of the bit shaft, the bit concerned rotates together with the tool holder 28 and receives its working torque in this way.
  • the tool holder 28 is driven as follows: In the ready-to-screw state, the output shaft 4 protrudes through the optionally available retaining ring 6 and into the coupling sleeve 16. The output shaft 4 only partially fills the interior of the coupling sleeve 16. The other part of the interior of the coupling sleeve 16 is filled by the coupling pin 20 of the drive shaft 19 of the tool magazine unit. In this way, the drive shaft 19 is non-rotatably connected to the output shaft 4 of the drive and is forced to rotate as soon as the drive has been started. The drive shaft 19 then drives the tool holder 28 via its pinion 22 by meshing with its preferably integral gear.
  • the coupling sleeve 16 comes into operation. This is because it is withdrawn from the output shaft 4 of the drive, since the coupling sleeve 16 moves forward transversely together with the magazine sleeve 9 and the slide 25. In this way, the magazine body 7 is then also moved forward so far that the tool pressure pin 5 is first pulled out of the interior of the tool holder 28 and finally even pulled out of the tool holder chamber of the magazine body 7 - until only the one is still on the screw bit etc. adhering to the free end face of the tool pressure pin 5 remains in the tool chamber.
  • the magazine body 7 is rotatable and takes the previously used screw bit with it in the circumferential direction.
  • the user can turn the magazine body 7 with his fingers via the window 10 in the magazine sleeve, which is preferably also attached in a corresponding manner to the underside of the magazine sleeve, which is not visible here, and in this way can select a different screw bit and insert it in Align the tool pressure pin 5.
  • the magazine body 7 is first shifted again so that the tool pressure pin penetrates one of its tool chambers and the screw bit located there is in front of it until it finally leaves the tool chamber via the passage 13 and is pushed into the interior of the tool holder 28 which is in alignment therewith.
  • the tool pressure pin usually also pushes itself at least a little way into the tool holder 28, but this is not mandatory.
  • the coupling sleeve 16 is pretensioned with respect to the output shaft 4. If you now operate the trigger of the screwdriver and set the motor 1 in motion in this way, the output shaft 4 will rotate for a short moment until its profile is again in alignment with the inner profile of the coupling sleeve 16 and the coupling sleeve 16 is then pushed onto the outer profile of the output shaft 4 under the action of the spring 18, that is to say it is automatically coupled.
  • the magazine body 7 is preferably provided with an indexing which ensures that the magazine body can always only be in a position in which the tool pressure pin 5 can pass through a tool chamber unhindered.
  • the magazine sleeve 9 can be provided with at least one, preferably at least two guide channels 34, each of which receives an indexing ball 35 and an indexing spring 36 (usually a compression spring).
  • the compression spring biases the indexing ball 35 against a section on the end face of the magazine body 7, which is provided with locking recesses that are used to bring the magazine body with the help of the indexing balls at the end of its respective rotation in a position in which one of its Tool receiving chambers is in a position in which the tool pressure pin 5 can be pushed into the relevant tool chamber without hindrance.
  • the profile used for the purpose of indexing can, but does not have to be, wavy. Latching depressions into which the balls fall can also be arranged at regular intervals in order to hold the magazine body 7 in a preferred position.
  • indexing bodies can also be used instead of the indexing balls 35, for example small bolts.
  • the tool pressure pin 5 is fixed immovably relative to the main housing part at least in the axial direction.
  • the tool holder is part of the slide.
  • the drive shaft 19 extends through the magazine body 7 and is detachably connected to the output shaft 4. The connection is released when the slide is in the tool change position. The connection is established when the slide is in the screwing position.
  • the second exemplary embodiment does not differ from the first exemplary embodiment.
  • the inner workings and in particular the drive, the indexing of the magazine body, its rotatability and the basic displaceability of the magazine body in the "pump gun type" are just the same executed as in the first embodiment, so that what has been described for this and in particular the things that the Fig. 3 shows also apply to the second exemplary embodiment.
  • the magazine sleeve 9 which also here rotatably houses the magazine body 7 and cannot rotate, is guided with its outer circumferential surface on the inner surface of the main housing parts 5a, 5b with the aid of a sliding guide.
  • slide tongues 26a, 26b in the first exemplary embodiment are "stunted" in this second exemplary embodiment. They now only form handle tongues 37, mostly without their own guiding function with respect to the respective main housing part. The fingers find a grip on these grip tongues in order to pull on the cap 38 and thereby move the magazine sleeve 9 together with the magazine body 7 out of the housing into the tool change position.
  • the already mentioned sliding guide preferably consists of several sliding strips 39, which are designed on the outer circumferential surface of the magazine sleeve 9 as areas that are raised / protruding in a radially outward direction over their surroundings.
  • Each of the slide strips slides in one on the inner circumferential surface of the main housing parts 5a, 5b between two guide strips 40 which are raised in the radially inward direction and which form a guide channel 41 between them.
  • Each guide channel 41 guides the slide strip 39 received by it on three different sides and thus ensures good support of the magazine sleeve 9 on the main housing parts 5a, 5b.
  • the slide strips 39 are each provided at their end facing the handle with a stopper projection 42, which is provided with a complementary projection on the end facing away from the handle respective guide channel 41 cooperates positively and defines the maximum extension length of the magazine sleeve.
  • four slide strips 39 are provided on the magazine sleeve 9, which are received by two guide channels 41 on each main housing part 5a and 5b.
  • the magazine sleeve is optionally additionally equipped with at least one, in this case even two, latching arms 43 designed as bending beams clamped on one side. At their end, these ideally each have a latching element 44, here for example two humps spaced apart from one another, between which a latching recess 45 is formed.
  • This latching element always snaps into a complementary latching element which is attached to the opposite main housing part 5a, 5b when the magazine body 9 is completely inserted into the main housing parts 5, 5b. As a result, the magazine body 9 is positively locked with respect to the main housing parts 5a, 5b.
  • the at least one complementary locking element on the side of the main housing parts 5a, 5b is preferably designed as a metal leaf spring 46 which can snap into the locking element assigned to it on the magazine sleeve, cf. Fig. 7 .
  • the leaf spring 46 is ideally fixed at its two ends to the respective main housing part 5a or 5b and forms a latching cam in its center.
  • the magazine sleeve 9 overlaps the gear 2 or at least the predominant part of the gear 2 on its outer circumference when the magazine sleeve 9 is completely inserted into the two main housing parts 5a, 5b. Based on Fig. 7 you can see what is meant here. This provides a high level of stability with a very compact structure at the same time.
  • a preferably common window 47 is formed in at least one or better two main housing parts 5a, 5b, which ideally accommodates a transparent housing section.
  • the window or the said "disk” allow a view of the transparent magazine body through their complementary window, even when the magazine sleeve is fully inserted into the main housing parts 5a, 5b, right into the area of the one or preferably several tool receiving chambers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)

Claims (15)

  1. Machine-outil, en particulier sous la forme d'une machine-outil à main, avec un élément principal de boîtier, un porte-outil (28) tournant autour d'un axe rotatif de travail pendant le fonctionnement, un entraînement (3) et un corps de magasin (7) pour recevoir différents outils, le corps de magasin (7) opposée à l'élément principal de boîtier (5a, 5b) pouvant être déplacé d'avant en arrière dans la direction parallèle à l'axe rotatif de travail (D), la machine-outil étant conçue de telle sorte que l'entraînement (3) entraîne un arbre d'entraînement (19) qui traverse le corps de magasin (7), caractérisée en ce que l'arbre d'entraînement (19) a un pignon (22) et entraîne avec celui-ci le porte-outil (28), l'arbre d'entraînement étant relié de manière amovible à un arbre de sortie (4) de l'entraînement (3), la machine-outil étant conçue de telle sorte que la connexion entre l'arbre d'entraînement (19) et l'arbre de sortie (4) est dissolue, lorsque le corps de magasin (7) est dans la position de changement, et est établie, lorsque le corps de magasin (7) est dans la position de vissage.
  2. Machine-outil selon la revendication 1, caractérisée en ce que le corps de magasin (7) est monté de manière rotative dans un coulisseau (25) ou dans un manchon de magasin (9) qui, à l'aide d'au moins un guidage coulissant, est monté de manière mobile à l'élément principal de boîtier (5a, 5b) dans la direction parallèle à l'axe de rotation (D).
  3. Machine-outil selon la revendication 2, caractérisée en ce que le guidage coulissant est un guidage extérieur ou comprend un guidage extérieur qui se compose d'au moins une, de préférence au moins deux languettes coulissantes (26a, 26b) qui, dans le cas idéal, sont diamétralement opposées et guidées sur la surface extérieure de l'élément principal de boîtier (5a, 5b) ou que le guidage coulissant est de préférence exclusivement un guidage intérieur, de préférence de la forme que le manchon de magasin (9) a un guidage coulissant sur sa surface circonférentielle extérieure qui coopère avec la surface circonférentielle intérieure des éléments principaux de boîtier de telle sorte que le manchon de magasin est guidé par les éléments principaux de boîtier (5a, 5b).
  4. Machine-outil selon l'une des revendications précédentes, caractérisée en ce que l'élément principal de boîtier (5a, 5b) est ouvert sur son côté frontal faisant face à l'outil et n'est fermé que par le coulisseau (25) ou un capuchon (38) fixé au manchon de magasin (9) ou formé d'un seul tenant avec celui-ci, le coulisseau ou le capuchon complétant la partie manquante du boîtier.
  5. Machine-outil selon l'une des revendications précédentes, caractérisée en ce que le corps de magasin (7) fait partie d'une unité de magasin d'outil, qui à son tour est guidée de préférence par un mouvement de translation à l'intérieur de l'élément principal de boîtier (5a, 5b) et / ou caractérisée en que l'unité de magasin d'outil comporte un manchon de magasin (9) et un corps de magasin (7) monté de manière rotative dans le manchon de magasin.
  6. Machine-outil selon la revendication 5, caractérisée en ce que l'unité de magasin d'outil comprend un accouplement pour accoupler et désaccoupler l'arbre de sortie (4) de l'entraînement (3), l'accouplement étant de préférence un accouplement fonctionnant complètement par engagement positif.
  7. Machine-outil selon l'une des revendications précédentes, caractérisée en ce que l'accouplement comprend un manchon d'accouplement coulissant (16) qui est conçu de telle manière que l'unité de magasin d'outil puisse également être inséré complètement dans l'élément principal de boîtier lorsque l'arbre de sortie (4) et le manchon d'accouplement (16) sont en relation l'un à l'autre de manière à ce que, en raison des différentes positions de rotation, leurs profils ne sont pas prêts à se verrouiller, de sorte que l'arbre de sortie ne peut initialement pas être inséré à l'intérieur du manchon de l'accouplement et, au lieu de cela, déplace le manchon d'accouplement (16).
  8. Machine-outil selon la revendication 7, caractérisée en ce que le manchon d'accouplement (16) peut être préchargée en direction de l'arbre de sortie (4) par un ressort d'accouplement (18) de telle sorte que le manchon d'accouplement (16) qui n'est initialement pas couplé à l'arbre de sortie (4) est poussé par accouplement automatique sur l'arbre de sortie (4), dès que l'arbre de sortie est entraîné.
  9. Machine-outil selon l'une des revendications précédentes, caractérisée en ce que l'unité de magasin d'outil comprend un arbre d'entraînement (19) qui la traverse de préférence au milieu et dont une extrémité est de préférence additionnellement montée de manière rotative dans le coulisseau (25) ou, en l'absence d'un coulisseau, dans un capuchon (38) destiné à fermer l'ouverture frontale entre les éléments principaux de boîtier (5a, 5b) et / ou dont l'autre extrémité est de préférence montée de manière rotative dans le manchon de magasin (9).
  10. Machine-outil selon l'une des revendications précédentes, caractérisée en ce que l'unité de magasin d'outil comprend un porte-outil (18) dont une extrémité est de préférence montée dans le coulisseau (25) ou sa plaque frontale ou, en l'absence d'un coulisseau, dans un capuchon (38) destiné à fermer l'ouverture frontale entre les éléments principaux de boîtier (5a, 5b) et / ou dont l'autre extrémité est de préférence montée de manière rotative dans le manchon de magasin (9).
  11. Machine-outil selon l'une des revendications précédentes, caractérisée en ce que le coulisseau (25) est constitué d'une plaque frontale qui, lorsque le coulisseau est complètement inséré dans l'élément principal d boîtier (5a, 5b), ferme l'ouverture frontale de l'élément principal de boîtier (5a, 5b) et se compose de préférence de deux languettes de guidage (26a, 26b) sortant de la plaque frontale, la plaque frontale étant traversée par le porte-outil (28) ou que le manchon de magasin (9) est relié à un capuchon (38) qui est conçu pour fermer l'ouverture frontale entre les éléments principaux de boîtier (5a, 5b) et qui est traversé par le porte-outil (28), le capuchon (38) ayant de préférence au moins une, mieux deux, languettes de préhension (37) qui chevauchent l'un ou les deux éléments principaux de boîtier sur le côté extérieur, de préférence seulement localement, non pas sur toute la circonférence et / ou au moins de 7 mm dans la direction parallèle à l'axe longitudinal ou à l'axe de rotation de la machine-outil.
  12. Machine-outil selon la revendication 11, caractérisée en ce que la plaque frontale ou le capuchon (38) est relié(e) de manière fixe à l'unité de magasin d'outils, de préférence par vissage ou verrouillage.
  13. Machine-outil selon l'une des revendications précédentes, caractérisée en ce que le corps de magasin (7) est translucide, au moins dans la zone de la circonférence extérieure de ses chambres de réception d'outils, pour indiquer clairement si une chambre est occupée et / ou le corps de magasin (7) comporte des fenêtres exemptes de matériau, chacune d'elles permettant une vue directe dans la chambre d'outil concerné.
  14. Machine-outil selon l'une des revendications précédentes, caractérisée en ce que le manchon de magasin (9) comporte au moins une, de préférence au moins deux fenêtres exemptes de matériau dans sa surface circonférentielle extérieure, qui permettent de saisir le corps de magasin (7) afin de le faire tourner et / ou au moins un des éléments principaux de boîtier, mieux à la fois l'un avec l'autre, forment une fenêtre qui est de préférence fermée d'un matériau transparent ou non fermée et qui est dimensionné et disposée de manière à être alignée avec une fenêtre dans le manchon de magasin quand celui-ci prend sa position de travail, de sorte que la vue par les fenêtres sur le corps de magasin (7) est dégagée.
  15. Machine-outil selon l'une des revendications précédentes, caractérisée en ce qu'un mécanisme indexé est installé entre le manchon de magasin et le corps de magasin, ledit mécanisme indexé agissant de préférence sur une surface frontale du corps de magasin et principalement sur la circonférence extérieure du corps de magasin, à l'aide duquel le manchon de magasin peut être mis en rotation en positions préférées, dans chacune desquelles une chambre de réception d'outil est placée en face de la tige de pression de l'outil (5) de sorte que la tige de pression de l'outil peut être insérée sans entrave dans la chambre de l'outil.
EP15164715.3A 2014-04-22 2015-04-22 Machine-outil dotée d'un magasin d'outils intégré Active EP2937188B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202014101891.3U DE202014101891U1 (de) 2014-04-22 2014-04-22 Werkzeugmaschine mit integriertem Werkzeugmagazin

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EP2937188A2 EP2937188A2 (fr) 2015-10-28
EP2937188A3 EP2937188A3 (fr) 2015-11-25
EP2937188B1 true EP2937188B1 (fr) 2021-07-07

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Publication number Priority date Publication date Assignee Title
CN108771558B (zh) * 2018-06-19 2021-01-15 张文佳 一种自动化换取骨钻头的骨钻装置
CN110039481B (zh) * 2019-04-15 2020-10-27 淮阴工学院 轮巢式全自动螺丝刀
DE102022213865A1 (de) 2022-12-19 2024-06-20 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine

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Publication number Priority date Publication date Assignee Title
US5022131A (en) * 1990-05-07 1991-06-11 Hobbs Edwin L Tool bit selection device
DE19737892A1 (de) * 1996-11-25 1998-05-28 Werner Reisch Werkzeugaufnahme für ein Antriebsaggregat
WO2000029173A1 (fr) * 1998-11-14 2000-05-25 Michael Burvill Outil mecanique
DE102011082787A1 (de) 2011-09-15 2013-03-21 Robert Bosch Gmbh Motorisch betriebene Werkzeugmaschine

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DE202014101891U1 (de) 2014-07-17
EP2937188A2 (fr) 2015-10-28
EP2937188A3 (fr) 2015-11-25

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