EP3481591B1 - Système de machine-outil portative - Google Patents

Système de machine-outil portative Download PDF

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Publication number
EP3481591B1
EP3481591B1 EP17739957.3A EP17739957A EP3481591B1 EP 3481591 B1 EP3481591 B1 EP 3481591B1 EP 17739957 A EP17739957 A EP 17739957A EP 3481591 B1 EP3481591 B1 EP 3481591B1
Authority
EP
European Patent Office
Prior art keywords
bearing
power tool
intermediate shaft
tool device
drive
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
EP17739957.3A
Other languages
German (de)
English (en)
Other versions
EP3481591A1 (fr
Inventor
Jens Blum
Heiko Roehm
Dietmar Saur
Tobias Herr
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
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Filing date
Publication date
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Publication of EP3481591A1 publication Critical patent/EP3481591A1/fr
Application granted granted Critical
Publication of EP3481591B1 publication Critical patent/EP3481591B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
    • 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
    • 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
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • a hand-held power tool device with at least one drive housing, with at least one hammer mechanism housing and with at least one rotary hammer mechanism, which has at least one planetary gear with at least one ring gear, has already been proposed. So a corresponding tool according to the preamble of claim 1 is from BE 525 492 known.
  • the invention is based on a hand-held power tool device with at least one drive housing, with at least one hammer mechanism housing and with at least one rotary hammer mechanism, which has at least one planetary gear with at least one ring gear.
  • the ring gear be clamped between the drive housing and the hammer mechanism housing.
  • a “handheld power tool device” should be understood to mean in particular at least a part, in particular a subassembly, of a handheld power tool.
  • the handheld power tool device can also include the entire handheld power tool.
  • the handheld power tool can be designed as any, advantageously electrical machine, but advantageously as a rotary impact wrench.
  • a “drive housing” should be understood to mean, in particular, a unit which is provided to accommodate a drive unit of the handheld power tool, in particular completely. “Provided” is to be understood in particular as specifically programmed, designed and / or equipped.
  • a “drive unit” is to be understood as meaning, in particular, a unit which is provided to convert, in particular, electrical energy into kinetic energy, in particular rotational energy.
  • the drive unit has in particular at least one electric motor.
  • the electric motor is designed in particular as an electric motor without a housing.
  • a drive shaft of the drive unit is in particular formed at least partially by an armature shaft of the housing-less electric motor.
  • a “percussion mechanism housing” is to be understood in particular as a unit which is provided to accommodate a percussion mechanism, in particular a rotary percussion mechanism, of the handheld power tool, in particular completely.
  • a “rotary percussion mechanism” is to be understood as meaning, in particular, a percussion mechanism which is provided to convert an at least substantially continuous power output of a drive unit into a sudden angular momentum.
  • the rotary hammer mechanism can in particular be designed as a cam rotary hammer mechanism or as a V-groove rotary hammer mechanism.
  • a “planetary gear” is to be understood as meaning, in particular, a gear which has at least one planet connected to a planet carrier, which is coupled in the radial direction outward with a ring gear and / or in the radial direction inward with a sun gear.
  • the sun gear, the planet and / or the ring gear can in particular be formed by round gearwheels or by non-circular gearwheels that are matched to one another.
  • Several planetary gears can be connected in series and / or several stages can be interposed between the planetary gear and the ring gear.
  • a “ring gear” is to be understood as meaning, in particular, a gear wheel that has a rim that is designed in the form of a cylinder jacket or in the form of an interrupted cylinder jacket.
  • the ring gear is "clamped" between the drive housing and the striking mechanism housing is to be understood in particular as meaning that the drive housing and the striking mechanism housing each have at least one clamping surface which, in an assembled state, rest against at least one surface of the ring gear from opposite sides and each of which exert a clamping force on the ring gear.
  • the ring gear is preferably clamped radially and / or axially between the drive housing and the hammer mechanism housing.
  • Such a configuration makes it possible to provide a hand-held power tool device of the generic type with advantageous structural properties.
  • an advantageously compact design, in particular an advantageously short length, of the handheld power tool device and / or an advantageously short tolerance chain can be achieved.
  • the ring gear is fixed to the drive housing and to the hammer mechanism housing by means of at least one screw element.
  • a “screw element” is to be understood as meaning, in particular, a screw or a screw nut.
  • the ring gear is preferably fixed to the drive housing and / or to the hammer mechanism housing by means of a plurality of screw elements.
  • the ring gear has at least one recess which is provided for the screw element to be passed through.
  • the drive housing and / or the hammer mechanism housing have at least one thread recess which has a thread corresponding to a thread of the screw element.
  • the drive housing, the striking mechanism housing and the ring gear are connected to one another by means of the screw element, the ring gear being arranged between the drive housing and on the striking mechanism housing.
  • the screw element being arranged between the drive housing and on the striking mechanism housing.
  • the hand-held power tool device have an impact mechanism cover which is formed in one piece with the ring gear.
  • a "hammer mechanism cover” is to be understood in this context in particular as a cover element which is provided to close the rotary hammer mechanism at least to a large extent in the direction of at least one further handheld power tool unit, in particular in the direction of a drive unit.
  • “at least a large part” should be understood to mean in particular at least 51%, preferably at least 65% and particularly preferably at least 75%.
  • the hammer mechanism cover has at least one passage recess which is provided for at least partial passage of at least one shaft, in particular a drive shaft.
  • In one piece is to be understood in particular to be at least cohesively connected, for example by a welding process, an adhesive process, an injection molding process and / or another process that appears sensible to a person skilled in the art, and / or be understood to be advantageously formed in one piece, such as, for example, by production from a cast and / or by production in a one-component or multi-component injection molding process and advantageously from a single blank.
  • the hammer mechanism cover and the ring gear are formed at least essentially from a metallic material, preferably from a metallic sintered material.
  • the hand-held power tool device have at least one intermediate shaft which is at least partially supported within the hammer mechanism cover.
  • An “intermediate shaft” is to be understood in particular as a shaft of a drive train which is arranged in particular between a drive unit and an output shaft, in particular a handheld power tool.
  • the at least one intermediate shaft is provided to transmit, in particular, a force and / or movement generated by the drive unit directly and / or indirectly to the output shaft.
  • the intermediate shaft is at least partially designed as a planet carrier of the planetary gear.
  • the intermediate shaft is at least partially supported within the hammer mechanism cover
  • an end of the intermediate shaft facing away from an output shaft of the rotary hammer mechanism is rotatably supported within the hammer mechanism cover.
  • “rotatably mounted” is to be understood in particular to mean that the intermediate shaft is provided to perform a rotational movement relative to the hammer mechanism cover, at least in one operating state.
  • the hand-held power tool device have at least one intermediate shaft bearing for mounting the intermediate shaft, which is at least partially arranged within the hammer mechanism cover.
  • an “intermediate shaft bearing” is to be understood in particular as a radial bearing which is provided to support the intermediate shaft in a rotatable manner.
  • the intermediate shaft bearing is arranged directly on a feed-through recess in the hammer mechanism cover.
  • the intermediate shaft bearing is in particular on a side of the rotary hammer mechanism facing an output shaft Striking mechanism cover arranged.
  • the intermediate shaft bearing can in particular be designed as a slide bearing or roller bearing.
  • the intermediate shaft bearing is preferably designed as a roller bearing, for example as a ball bearing, roller bearing or needle bearing. In this way, an advantageously low-friction mounting of the intermediate shaft can be achieved.
  • an advantageously short overall length of the rotary hammer mechanism can be achieved.
  • the hammer mechanism cover have at least one bearing receptacle, which is provided for receiving the intermediate shaft bearing.
  • a “bearing receptacle” is to be understood in particular as an area formed at least partially by the hammer mechanism cover, which is provided for a stationary arrangement of the intermediate shaft bearing within the hammer mechanism cover.
  • the bearing receptacle is in particular formed in one piece with the hammer mechanism cover.
  • the bearing receptacle is arranged in the area of a feed-through recess in the hammer mechanism cover.
  • the bearing receptacle is designed in particular at least partially as a hollow cylinder.
  • the bearing receptacle has an at least essentially annular stop element for the intermediate shaft bearing at an end facing away from the hammer mechanism cover.
  • the stop element is in particular formed in one piece with the bearing receptacle.
  • an inner diameter of the bearing seat corresponds at least essentially to an outer diameter of the intermediate shaft bearing.
  • the intermediate shaft bearing is preferably fixed in the bearing receptacle by a press fit.
  • a “press fit” is to be understood in particular as a non-positive connection which can be designed as a transverse and / or longitudinal press fit.
  • a “non-positive connection” is to be understood in particular as a releasable connection, with a holding force between two components being transmitted, preferably by a frictional force between the components. In this way, an advantageously simple, secure and / or permanent arrangement of the intermediate shaft bearing within the hammer mechanism cover can be achieved.
  • a handheld power tool in particular an impact wrench, with at least one handheld power tool device according to the invention is proposed.
  • an advantageously compact handheld power tool in particular an advantageously compact impact wrench, can be provided.
  • the handheld power tool can have an advantageously short overall length.
  • the handheld power tool device according to the invention is not intended to be restricted to the application and embodiment described above.
  • the hand-held power tool device according to the invention can have a number of individual elements, components and units that differs from a number of individual elements, components and units mentioned herein in order to fulfill a mode of operation described herein.
  • FIG. 1 shows a handheld power tool 34a, which is used as an impact wrench is formed, in a schematic partial sectional view.
  • the handheld power tool 34a is designed as a cordless impact wrench.
  • the handheld power tool 34a comprises a handle 80 which extends perpendicular to an axis of rotation 84a of a tool holder 86a of the handheld power tool 34a provided for receiving an insert tool (not shown here).
  • the handle 80a comprises a battery holder 90a on a side 88a facing away from the handheld power tool 34a.
  • the battery holder 90a is provided to accommodate a battery unit 92a for supplying power to the handheld power tool 34a.
  • the handheld power tool 34a has a handheld power tool device 10a with a drive unit 12a and a rotary hammer mechanism 16a.
  • Figure 2 shows the handheld power tool device 10 in a sectional illustration.
  • the handheld power tool device 10a has a drive housing 72a and an impact mechanism housing 74a (cf. Figure 1 ).
  • the drive housing 72a at least substantially completely encloses the drive unit 12a.
  • the hammer mechanism housing 74a encloses the rotary hammer mechanism 16a at least essentially completely (cf. Figure 1 ).
  • the drive unit 12a is designed as an electrical drive unit which is supplied with electrical energy by means of the rechargeable battery unit 92a.
  • the drive unit 12a has an electric motor 26a without a housing, which is provided to convert the electrical energy provided by the rechargeable battery unit 92a into rotational energy.
  • the electric motor 26a is designed as an open-frame motor, in which components of the electric motor 26a are individually mounted in the drive housing 72a.
  • the drive unit 12a has a drive shaft 14a which is provided to transmit the rotational energy to the rotary hammer mechanism 16a.
  • the drive shaft 14a is completely formed by an armature shaft 28a of the housing-less electric motor 26a.
  • the armature shaft 28a is made in one piece.
  • the rotary hammer mechanism 16a is designed as a V-groove rotary hammer mechanism.
  • the rotary hammer mechanism 16a is provided to convert a continuous power output of the drive unit 12a into a sudden angular momentum.
  • the power of the drive unit 12a is passed on to the insert tool by striking a hammer 96a of the rotary hammer mechanism 16a on a corresponding anvil 100a of an output spindle 15a by means of a pulse of high power intensity.
  • the anvil 100a is formed in one piece with the output spindle 15a and the tool holder 86a.
  • the striker 96a is mounted in such a way that axial movement and radial movement are possible.
  • the axial movement is controlled by V-shaped grooves 98 (cf. Figure 3 ) and driver balls 97a (cf. Figure 1 ).
  • a spring 138a provides the return movement of the striker 96a.
  • the rotary hammer mechanism 16a has an intermediate shaft 18a which is at least essentially aligned with the drive shaft 14a. Furthermore, the handheld power tool device 10a has at least one bearing 20a for mounting the drive shaft 14a. The bearing 20a is arranged at least partially in a plane 22a which intersects the intermediate shaft 18a and which runs at least substantially perpendicular to the intermediate shaft 18a. The drive shaft 14a is at least partially supported within the intermediate shaft 18a.
  • the intermediate shaft 18a has a receiving recess 24a which is provided to at least partially receive the drive shaft 14a. The receiving recess 24a extends at least substantially along an axis of rotation 108a of the intermediate shaft 18a.
  • the drive shaft 14a protrudes at least partially into the intermediate shaft 18a, in particular into the receiving recess 24a of the intermediate shaft 18a.
  • the bearing 20a for supporting the drive shaft 14a is arranged within the receiving recess 24a.
  • the bearing 20a for supporting the drive shaft 14a is designed as a roller bearing.
  • the intermediate shaft 18a also has a sealing element receptacle 30a.
  • the sealing element receptacle 30a is arranged directly on an insertion opening 136a of the receiving recess 24a of the intermediate shaft 18a, which is provided to introduce the drive shaft 14a into the intermediate shaft 18a.
  • the intermediate shaft 18a has at least one sealing element 32a arranged in the sealing element receptacle 30a.
  • the sealing element 32a is designed as a shaft sealing ring, in particular as a radial shaft sealing ring, which in an assembled state is arranged between the drive shaft 14a and the intermediate shaft 18a.
  • the sealing element receptacle 30a is designed as a shaft sealing ring receptacle.
  • Another bearing 102a for mounting the drive shaft 14a is arranged on a side 104a of the electric motor 26a facing away from the tool holder 86a in the drive housing 72a.
  • the handheld power tool device 10a has a cooling air unit 36a, which comprises at least one fan wheel 38a arranged between the drive unit 12a and the rotary hammer mechanism 16a.
  • the fan wheel 38a is provided in particular to generate a cooling air flow for cooling the rotary hammer mechanism 16a and / or the drive unit 12a.
  • the fan wheel 38a is rotationally fixed on the drive shaft 14a of the drive unit 12a.
  • the drive unit 12a is provided to set the fan wheel 38a in a rotational movement during operation of the handheld power tool 34a.
  • the fan wheel 38a and the rotary hammer mechanism 16a overlap at least partially in the axial direction 40a.
  • the fan wheel 38a preferably projects at least partially beyond the rotary hammer mechanism 16a in the axial direction 40a.
  • the fan wheel 38a has a plurality of fan wheel blades 110a which are arranged in the circumferential direction and which overlap at least part of the rotary hammer mechanism 16a in the circumferential direction.
  • the fan impeller blades 110a extend at least substantially in the axial direction 40a.
  • the rotary hammer mechanism 16a has at least one gear unit 42a designed as a single-stage planetary gear 50a.
  • the bearing 20a for supporting the drive shaft 14a is arranged on a side of the planetary gear 50a facing away from the drive unit 12a.
  • a toothing 144a between the drive shaft 14a and the planetary gear 50a is arranged between the bearing 20a and the bearing 102a.
  • the gear unit 42a can be designed as a multi-stage planetary gear.
  • the fan wheel 38a and at least the gear unit 42a preferably overlap at least partially in the axial direction 40a.
  • the planetary gear 50a comprises at least one ring gear 46a.
  • the rotary hammer mechanism 16a further comprises a hammer mechanism cover 44a.
  • the hammer mechanism cover 44a is arranged between the drive unit 12a and the planetary gear 50a.
  • the hammer mechanism cover 44a is provided to close the rotary hammer mechanism 16a in the direction of the drive unit 12a, at least to a large extent.
  • the hammer mechanism cover 44a has a lead-through recess 106a, which is provided for at least partial lead-through of at least the drive shaft 14a.
  • the striking mechanism cover 44a is formed in one piece with the ring gear 46a.
  • the striking mechanism cover 44a and the ring gear 46a consist at least essentially of a metallic material, in particular of a metallic sintered material.
  • the fan wheel 38a and at least the hammer mechanism cover 44a preferably overlap at least partially in the axial direction 40a.
  • the handheld power tool device 10 also has an intermediate shaft bearing 48a for mounting the intermediate shaft 18a.
  • the intermediate shaft bearing 48a is designed as a roller bearing. Alternatively, the intermediate shaft bearing 48a can be designed as a slide bearing.
  • the intermediate shaft bearing 48a is designed as a radial bearing, which is provided to support the intermediate shaft 18a rotatably in the hammer mechanism cover 44a.
  • the intermediate shaft bearing 48a is at least partially within a Arranged hammer mechanism cover 44a of rotary hammer mechanism 16a.
  • the intermediate shaft bearing 48a is arranged directly on the feed-through recess 106a of the hammer mechanism cover 44a.
  • the intermediate shaft bearing 48a is arranged on the side of the hammer mechanism cover 44a facing the tool holder 86a.
  • the hammer mechanism cover 44a has at least one bearing seat 52a, which is provided to accommodate the intermediate shaft bearing 48a.
  • the bearing receptacle 52a is formed in one piece with the hammer mechanism cover 44a.
  • the bearing receptacle 52a is arranged in the area of the lead-through recess 106a of the hammer mechanism cover 44a.
  • the bearing receptacle 52a is formed at least essentially as a hollow cylinder.
  • the bearing receptacle 52a has an at least essentially annular stop element 112a for the intermediate shaft bearing 48a on an end facing away from the hammer mechanism cover 44a.
  • the stop element 112a is formed in one piece with the bearing receptacle 52a.
  • An inside diameter of the bearing seat 52a corresponds at least essentially to an outside diameter of the intermediate shaft bearing 48a.
  • the intermediate shaft bearing 48a is preferably fixed in the bearing receptacle 52a by a press fit.
  • the fan wheel 38a and at least the intermediate shaft bearing 48a and / or the intermediate shaft 18a preferably overlap at least partially in the axial direction 40a.
  • Figure 3 shows the intermediate shaft 18a in a perspective view.
  • Figure 4 shows the intermediate shaft 18a in a sectional view along the sectional plane III-III.
  • the intermediate shaft 18a is designed as a planetary gear carrier 94a of the planetary gear 50a.
  • the intermediate shaft 18a has a plurality of planetary gear receptacles 54a, 56a, 58a and planetary gear bearing points 60a, 62a, 64a arranged in the circumferential direction.
  • planetary gear receptacle 54a, 56a, 58a there is a respective planetary gear 130a which is rotatably supported by means of a pin 132a.
  • the intermediate shaft 18a has at least one material recess 66a, 68a, 70a on its outer circumference, at least in the region of at least one planetary gear bearing point 60a, 62a, 64a.
  • a number of material recesses 66a, 68a, 70a corresponds to a number of planetary gear receptacles 54a, 56a, 58a.
  • Each planet gear receptacle 54a, 56a, 58a is assigned exactly one material recess 66a, 68a, 70a.
  • the intermediate shaft 18a has three planet gear receptacles 54a, 56a, 58a, each with a planet gear bearing point 60a, 62a, 64a.
  • the planetary gear bearing points 60a, 62a, 64a are arranged at least substantially offset from one another by 120 ° in the circumferential direction on the intermediate shaft 18a.
  • the planetary gear receptacles 54a, 56a, 58a are radially closed by themselves a longitudinal extension direction 122a of the intermediate shaft 18a extending webs 124a separated from one another.
  • the planetary gear receptacles 54a, 56a, 58a are delimited by two disk-shaped wall elements 126a, 128a which are arranged at least substantially perpendicular to the direction of longitudinal extent 122a.
  • the wall elements 126a, 128a are at least substantially circular.
  • the wall elements 126a, 128a are formed in one piece with the intermediate shaft 18a.
  • the material recesses 66a, 68a, 70a are formed at least essentially in the shape of a segment of a circle.
  • the planetary gear receptacles 54a, 56a, 58a are designed at least essentially in the shape of a segment of a cylinder.
  • the material recesses 66a, 68a, 70a are made in one of the wall elements 126a, 128a.
  • the material cutouts 66a, 68a, 70a are made in the wall element 126a, which is arranged in the assembled state of the intermediate shaft 18a in the direction of a drive unit 12a.
  • the wall elements 126a, 128a have an at least substantially identical radius. Alternatively, one of the wall elements 126a, 128a can have a smaller radius.
  • the material recesses 66a, 68a, 70a are provided when the intermediate shaft 18a is manufactured to temporarily at least partially accommodate a milling head spindle 78a (cf. Figure 5 ).
  • the planetary gear receptacles 54a, 56a, 58a are introduced into a blank of the intermediate shaft 18a by means of a side milling cutter 134a. While the planetary gear receptacles 54a, 56a, 58a are being introduced, a milling head spindle 78a of the disk milling cutter 134a is at least partially inserted into a material recess 66a, 68a, 70a.
  • the planetary gear receptacles 54a, 56a, 58a are preferably introduced into the intermediate shaft 18a in a common method step, at least essentially at the same time, in particular by means of a plurality of identical disk milling cutters 134a.
  • the disk milling cutters 134a are brought up to the intermediate shaft 18a in such a way that the milling head spindles 78a at any point in time run at least substantially parallel to a direction of longitudinal extent 122a of the intermediate shaft 18a.
  • Figure 6 shows the handheld power tool 34a in a front view.
  • Figure 7 shows a sectional illustration of the handheld power tool 34a along the section line VI-VI.
  • the ring gear 46a of the planetary gear 50a is clamped between the drive housing 72a and the hammer mechanism housing 74a.
  • the ring gear 46a is axially between the drive housing 72a and the hammer mechanism housing 74a clamped.
  • the ring gear 46a can be clamped radially between the drive housing 72a and the hammer mechanism housing 74a.
  • the drive housing 72a and the hammer mechanism housing 74a have a clamping surface 114a which, in an assembled state, bear against at least one surface 116a of the ring gear 46a from opposite sides and which each exert a clamping force on the ring gear 46a.
  • the ring gear 46a is fixed to the drive housing 72a by means of at least one screw element 76a, preferably by means of at least one screw.
  • the ring gear 46a is fixed by way of example with four screw elements 76a.
  • the ring gear 46a has recesses 118a on an outer circumference, which are provided for the screw elements 76a to be passed through.
  • the drive housing 72a has a number of thread recesses 120a corresponding to the number of screw elements 76a, which have a thread corresponding to a thread of the screw elements 76a.
  • the drive housing 72a, the hammer mechanism housing 74a and the ring gear 46a are connected to one another in an assembled state by means of the screw elements 76a, the ring gear 46a being arranged between the drive housing 72a and the hammer mechanism housing 74a.
  • the ring gear 46a can be fixed to the hammer mechanism housing 74a by means of at least one screw element 76a.
  • FIG 8 shows an alternative embodiment of the handheld power tool device 10b in a sectional illustration.
  • the handheld power tool device 10b has a drive unit 12b and a rotary hammer mechanism 16b with a planetary gear 50b.
  • the drive unit 12b has an electric motor 26b without a housing, which is provided to convert electrical energy into rotational energy.
  • the electric motor 26b is designed as an open-frame motor.
  • the drive unit 12b has a drive shaft 14b which is provided to transmit the rotational energy to the rotary hammer mechanism 16b.
  • the drive shaft 14b is partially formed by an armature shaft 28b of the housing-less electric motor 26b.
  • the rotary hammer mechanism 16b has an intermediate shaft 18b which is at least substantially aligned with the drive shaft 14b. Furthermore, the handheld power tool device 10b has at least one bearing 20b for mounting the drive shaft 14b.
  • the drive shaft 14b is at least partially supported within the intermediate shaft 18b.
  • the intermediate shaft 18b has a receiving recess 24b which is provided for at least partially receiving the drive shaft 14b.
  • the bearing 20b is arranged directly on an insertion opening 136b of the receiving recess 24b of the intermediate shaft 18b, which is provided to insert the drive shaft 14b into the intermediate shaft 18b.
  • the bearing 20b for supporting the drive shaft 14b is arranged on a side of the planetary gear 50b facing the drive unit 12b.
  • the bearing 20b is designed as a roller bearing.
  • FIG 9 shows a further alternative embodiment of the handheld power tool device 10c in a sectional illustration.
  • the handheld power tool device 10c has a drive unit 12c and a rotary hammer mechanism 16c with a planetary gear 50c.
  • the drive unit 12c has an electric motor 26c without a housing, which is provided to convert electrical energy into rotational energy.
  • the electric motor 26c is designed as an open-frame motor.
  • the drive unit 12c has a drive shaft 14b which is provided to transmit the rotational energy to the rotary hammer mechanism 16c.
  • the drive shaft 14c is partially formed by an armature shaft 28c of the housing-less electric motor 26c.
  • the rotary hammer mechanism 16c has an intermediate shaft 18c which is at least essentially aligned with the drive shaft 14c. Furthermore, the handheld power tool device 10c has at least one bearing 20c for mounting the drive shaft 14c. The drive shaft 14c is at least partially supported within the intermediate shaft 18c. The intermediate shaft 18c has a receiving recess 24c which is provided to at least partially receive the drive shaft 14c. The bearing 20c is arranged directly on an insertion opening 136c of the receiving recess 24c of the intermediate shaft 18c, which is provided to insert the drive shaft 14c into the intermediate shaft 18c. The warehouse 20c for storage the drive shaft 14c is arranged on a side of the planetary gear 50c facing the drive unit 12c.
  • the bearing 20c is designed as a ball bearing bearing. Furthermore, the hand-held power tool device 10c has a sealing ring 140c which surrounds the bearing 20c in the circumferential direction and which is arranged between the bearing 20c and an inner diameter receiving recess 24c of the intermediate shaft 18c.
  • the intermediate shaft 18c has a groove 142c which is provided for receiving the sealing ring 140c.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Portable Power Tools In General (AREA)

Claims (10)

  1. Dispositif de machine-outil portative comprenant au moins un boîtier d'entraînement (72a ; 72b ; 72c), au moins un boîtier de mécanisme de percussion (74a ; 74b ; 74c) et au moins un mécanisme de percussion rotatif (16a ; 16b ; 16c), qui comprend au moins un engrenage planétaire (50a ; 50b ; 50c) muni d'au moins une couronne (46a ; 46b ; 46c), la couronne (46a ; 46b ; 46c) étant bloquée entre le boîtier d'entraînement (72a ; 72b ; 72c) et le boîtier de mécanisme de percussion (74a ; 74b ; 74c) par le fait que la couronne (46a ; 46b ; 46c) est fixée au moyen d'au moins un élément vis (76a ; 76b ; 76c) au boîtier (72a ; 72b ; 72c) et au boîtier de mécanisme de percussion (74a ; 74b ; 74c), caractérisé par un couvercle de mécanisme de percussion (44a ; 44b ; 44c), qui est configuré d'un seul tenant avec la couronne (46a ; 46b ; 46c), le couvercle de mécanisme de percussion (44a ; 44b ; 44c) comprenant un évidement de passage (106a), qui est prévu pour un passage au moins partiel d'au moins un arbre d'entraînement (14a ; 14b ; 14c), et un palier d'arbre intermédiaire (48a ; 48b ; 48c) pour le montage d'un arbre intermédiaire (18a ; 18b ; 18c) au moins partiellement à l'intérieur du couvercle de mécanisme de percussion (44a ; 44b ; 44c) étant agencé directement sur l'évidement de passage (106a).
  2. Dispositif de machine-outil portative selon la revendication 1, caractérisé en ce que la couronne (46a ; 46b ; 46c) est bloquée radialement et/ou axialement entre le boîtier d'entraînement (72a ; 72b ; 72c) et le boîtier de mécanisme de percussion (74a ; 74b ; 74c).
  3. Dispositif de machine-outil portative selon l'une quelconque des revendications précédentes, caractérisé en ce que le couvercle de mécanisme de percussion (44a ; 44b ; 44c) comprend au moins un logement de palier (52a ; 52b ; 52c), qui est prévu pour un logement du palier d'arbre intermédiaire (48a ; 48b ; 48c) .
  4. Dispositif de machine-outil portative selon la revendication 3, caractérisé en ce que le palier d'arbre intermédiaire (48a ; 48b ; 48c) est fixé par un ajustement serré dans le logement de palier (52a ; 52b ; 52c).
  5. Dispositif de machine-outil portative selon la revendication 3 ou 4, caractérisé en ce que le logement de palier (52a ; 52b ; 52c) est agencé dans la zone de l'évidement de passage (106a) du couvercle de mécanisme de percussion (44a ; 44b ; 44c).
  6. Dispositif de machine-outil portative selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins un palier (20a ; 20b ; 20c) pour le montage d'un arbre d'entraînement (14a ; 14b ; 14c) est prévu, le palier (20a ; 20b ; 20c) étant agencé au moins partiellement dans un plan (22a ; 22b ; 22c) coupant un arbre intermédiaire (18a ; 18b ; 18c), qui s'étend au moins essentiellement perpendiculairement à l'arbre intermédiaire (18a ; 18b ; 18c).
  7. Dispositif de machine-outil portative selon la revendication 6, caractérisé en ce que l'arbre d'entraînement (14a ; 14b ; 14c) est monté au moins partiellement à l'intérieur de l'arbre intermédiaire (18a ; 18b, 18c), l'arbre intermédiaire (18a ; 18b, 18c) comprenant un évidement de logement (24a ; 24b ; 24c), qui est prévu pour un logement au moins partiel de l'arbre d'entraînement (14a ; 14b ; 14c), et le palier (20a ; 20b ; 20c) étant agencé à l'intérieur de l'évidement de logement (24a ; 24b ; 24c).
  8. Dispositif de machine-outil portative selon la revendication 6 ou 7, caractérisé en ce que le palier (20a) est agencé sur un côté de l'engrenage planétaire (50a) détourné d'une unité d'entraînement (12a).
  9. Dispositif de machine-outil portative selon la revendication 6 ou 7, caractérisé en ce que le palier (20b ; 20c) est agencé sur un côté de l'engrenage planétaire (50b ; 50c) tourné vers une unité d'entraînement (12b ; 12c).
  10. Machine-outil portative munie d'au moins un dispositif de machine-outil portative (10a ; 10b ; 10c) selon l'une quelconque des revendications précédentes.
EP17739957.3A 2016-07-11 2017-07-11 Système de machine-outil portative Active EP3481591B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102016212590 2016-07-11
DE102017211774.5A DE102017211774A1 (de) 2016-07-11 2017-07-10 Handwerkzeugmaschinenvorrichtung
PCT/EP2017/067400 WO2018011205A1 (fr) 2016-07-11 2017-07-11 Système de machine-outil portative

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EP3481591B1 true EP3481591B1 (fr) 2021-12-15

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CN (1) CN109476002B (fr)
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DE102022214002A1 (de) * 2022-12-20 2024-06-20 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine

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US20190291258A1 (en) 2019-09-26
CN109476002B (zh) 2021-06-22
EP3481591A1 (fr) 2019-05-15
WO2018011205A1 (fr) 2018-01-18
US10960529B2 (en) 2021-03-30
DE102017211774A1 (de) 2018-01-11
CN109476002A (zh) 2019-03-15

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