EP3895846A1 - Tournevis de construction à sec - Google Patents

Tournevis de construction à sec Download PDF

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Publication number
EP3895846A1
EP3895846A1 EP21173192.2A EP21173192A EP3895846A1 EP 3895846 A1 EP3895846 A1 EP 3895846A1 EP 21173192 A EP21173192 A EP 21173192A EP 3895846 A1 EP3895846 A1 EP 3895846A1
Authority
EP
European Patent Office
Prior art keywords
gear
unit
coupling
drywall screwdriver
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21173192.2A
Other languages
German (de)
English (en)
Inventor
Andre Ullrich
Holger Froehling
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=46208529&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3895846(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3895846A1 publication Critical patent/EP3895846A1/fr
Pending legal-status Critical Current

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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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0064—Means for adjusting screwing depth
    • 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
    • B25B21/002—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose for special purposes
    • 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
    • B25B23/141—Mechanical overload release couplings

Definitions

  • the invention is based on a drywall screwdriver with a housing, with a screw-in depth limiting element, with a gear unit, with an output spindle, with a drive unit and with a coupling unit which is intended to couple and / or decouple a torque transmission from the gear unit to the output spindle.
  • a gear element of the gear unit is firmly connected to at least one coupling element of the coupling unit.
  • a “drywall screwdriver” is to be understood as meaning, in particular, a hand-held power tool which is intended to work in particular on materials such as plasterboard and preferably to screw screws into materials such as plasterboard.
  • “Provided” is to be understood in particular as specifically designed, designed and / or equipped.
  • a "screw-in depth limiting element” is to be understood in particular as an element which is provided at least essentially to provide a screw-in depth of the drywall screwdriver.
  • the screw-in depth limiting element has a depth stop.
  • a screw-in depth of the screw-in depth limiting element can preferably be configured to be adjustable. However, other limiting parameters that appear sensible to a person skilled in the art, such as a speed or a torque, are also conceivable.
  • the screw-in depth limiting element can be designed electronically, magnetically, optically or in some other way that appears sensible to a person skilled in the art. In a particularly preferred embodiment, the screw-in depth limiting element is designed mechanically.
  • a “gear unit” is to be understood in particular as a unit which is provided to transform an incoming torque into an outgoing differing torque and / or to transform an input speed into a differing output speed.
  • a “drive unit” is to be understood in particular as an electrical and / or mechanical motor unit which is advantageously provided for generating a rotary movement during operation.
  • a “clutch unit” is to be understood in particular as a unit which is provided to transmit a torque and / or to prevent a torque transmission, the torque being transmitted unchanged via the clutch unit when the clutch unit is closed.
  • the coupling unit comprises at least two, preferably three coupling elements, two coupling elements preferably being permanently coupled in one operation and only partially disengaging axially and / or rotating relative to one another in the circumferential direction.
  • a “transmission element” is to be understood as meaning, in particular, an element of the transmission unit which is provided for torque transmission and / or a torque change.
  • this should be understood to mean, in particular, a gearwheel, particularly advantageously a planet carrier element.
  • a “coupling element” is to be understood in particular as an element which is provided to carry out a coupling movement and / or to assume a coupling position. The coupling movement can bring about a coupling and / or a decoupling and / or advantageous support coupling and / or decoupling.
  • the clutch position is used in particular to transmit a force, in particular a torque, via a form-fitting and / or force-fitting connection.
  • the positive and / or non-positive connection is provided in particular for the transmission of a torque.
  • this should be understood to mean, in particular, a form-fit coupling element, particularly advantageously a claw coupling element.
  • the configuration according to the invention can advantageously save components, installation space and weight. Furthermore, a small tolerance can be achieved between the output spindle and a motor spindle.
  • the gear element of the gear unit is at least partially formed in one piece with the at least one coupling element of the coupling unit.
  • “At least partially in one piece” is to be understood in particular to mean that at least individual elements and / or individual components of two units are formed in one piece with one another.
  • “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 advantageously formed in one piece, such as by a Manufactured from a single casting and / or by manufacturing in a single or multi-component injection molding process and advantageously from a single blank. This in turn can advantageously save components, installation space, weight and assembly effort.
  • the gear unit comprises at least one planetary gear.
  • the planetary gear preferably comprises at least two, preferably three planet gears and at least one sun gear or pinion.
  • the planetary gear preferably comprises a planet carrier element which comprises at least two, preferably three bolts, which are provided to carry the planet gears.
  • the planetary gear preferably has at least one ring gear.
  • an advantageously short and compact design of the drywall screwdriver can be achieved, particularly in the axial direction.
  • a preferably robust and inexpensive design of the gear unit can be achieved.
  • an advantageously symmetrical structure and an advantageous transmission of forces and torques from the drive unit via the gear unit to the output spindle can be achieved.
  • a “single-stage planetary gear” is to be understood as meaning, in particular, a planetary gear that has a single sun gear and / or a single ring gear and / or a single set of planet gears, which preferably lie on at least one plane.
  • it is to be understood as a planetary gear in which a transmission ratio can be realized.
  • the coupling element comprises at least one entrainment element which is at least partially formed in one piece with a planet carrier element of the planetary gear.
  • a "planet carrier element” is to be understood in particular as an element that is provided to rotatably accommodate at least one planet gear of the planetary gear, the at least one planet gear being rotatably received on the planet carrier element preferably via at least one bolt.
  • the bolt can be formed by a component that is formed in one piece with the planet carrier element or, particularly advantageously, by a component that is separate from the planet carrier element and fastened to it.
  • a “driver element” is to be understood as meaning in particular an element which is provided to transmit at least one force and / or a movement over at least one surface to a further element and / or to absorb a force and / or movement of another element.
  • the planet carrier element is held directly in the housing via at least one bearing unit.
  • a “bearing unit” is to be understood as meaning, in particular, a unit which can absorb support forces in at least one direction and also enables a relative movement between two components with low friction losses.
  • this should be understood to mean, in particular, a plain bearing and / or, particularly advantageously, a roller bearing, but other bearing units that appear sensible to a person skilled in the art are also conceivable.
  • the sliding bearing advantageously has a material pairing on a sliding surface which has a coefficient of friction at least on the sliding surface that is at least less than a coefficient of friction that arises when a material of the planet carrier element and a material of the housing are paired.
  • “Directly” is to be understood in particular to mean that the planet carrier element is held in the housing via the at least one bearing unit without interposed gear and / or housing elements.
  • an axis of the output spindle and / or an axis of the gear unit corresponds to an axis of the drive unit.
  • An “axis” is to be understood in particular as an axis along a main extent of a component and / or an axis of symmetry and / or a matter of rotation.
  • a particularly compact design can advantageously be implemented as a result.
  • an advantageous shape of the drywall screwdriver can be realized in this way.
  • an advantageous transfer of forces and moments can be achieved.
  • the drywall screwdriver has at least one support element which differs from a housing element and which at least partially engages around a ring gear of the planetary gear.
  • a “support element” is to be understood in particular as an element which is provided to absorb and / or redirect forces from at least one direction. As a result, forces can advantageously be transmitted without this additional support forces act on the ring gear. Furthermore, an advantageous centering of the planetary gear unit can be realized by the ring gear.
  • the output spindle is at least partially supported and / or guided in the gear element of the gear unit.
  • the output spindle is preferably at least partially supported and / or guided in the planet carrier element of the planetary gear.
  • FIG. 1 a partial section of a drywall screwdriver according to the invention is shown in a side view.
  • the drywall screwdriver has a housing 10 on.
  • the housing 10 comprises a gear housing 56 and a motor housing 58.
  • the gear housing 56 is manufactured in a pot construction.
  • the motor housing 58 is made in a shell construction.
  • the drywall screwdriver also has a screw-in depth limiting element 12, a gear unit 14, an output spindle 16, a drive unit 18 and a coupling unit 20.
  • the drive unit 18 is designed as a direct current motor.
  • the screw-in depth limiting element 12 is arranged on an end of the gear housing 56 that faces away from the motor housing 58 when viewed in an axial direction 62 of the gear housing 56.
  • the screw-in depth limiting element 12 is detachably connected to the housing 10 of the drywall screwdriver by means of a plug connection.
  • the screw-in depth limiting element 12 comprises an adjusting sleeve 66.
  • the screw-in depth limiting element 12 comprises a depth stop 68.
  • the depth stop 68 is provided to limit a screw-in depth of a screw during a screwing-in process.
  • the adjustment sleeve 66 is provided to adjust the screw-in depth.
  • the screw-in depth is set manually by means of the setting sleeve 66.
  • an operator rotates the setting sleeve 66 about an axis which corresponds to an axis 38 of the output spindle 16.
  • the depth stop 68 is moved along the axial direction 62.
  • the adjusting sleeve 66 has an internal thread 70.
  • the internal thread 70 extends over a partial area of an internal surface of the adjusting sleeve 66.
  • the depth stop 68 has an external thread 72.
  • the external thread 72 extends over a partial area of an external surface of the depth stop 68.
  • the external thread 72 of the depth stop 68 and the internal thread 70 of the adjusting sleeve 66 mesh with one another when the screw-in depth limiting element 12 is in the assembled state.
  • a spring element 76 is arranged in front of the depth stop 68. The spring element 76 presses the depth stop 68 inward in the radial direction 74.
  • the spring element 76 is arranged in a radially inner recess 78 of the adjusting sleeve 66.
  • the radially inner recess 78 is arranged on an end of the setting sleeve 66 facing the depth stop 68 in the axial direction 62.
  • the radially inner recess 78 secures the spring element 76 in the axial direction 62.
  • the spring element 76 presses flanks of the external thread 72 of the depth stop 68 in the radial direction 74 on flanks of the internal thread 70 of the adjusting sleeve 66 in an area which lies opposite the spring element 76 in the radial direction 74. This creates friction between the flanks of the internal thread 70 and the external thread 72.
  • the screw-in depth limiting element 12 has latching elements, not shown, which are provided to subdivide the rotation of the adjusting sleeve 66 into individual latching steps.
  • An automatic adjustment of the depth stop 68 can also be reliably prevented by the locking elements.
  • the adjustment sleeve 66 has a grip area 80 which is arranged on an outer side of the adjustment sleeve 66.
  • the grip area 80 has lamellar elevations 82.
  • the grip area 80 is provided to increase the grip of the outside of the adjustment sleeve 66 and thereby make it easier for the operator to turn the adjustment sleeve 66.
  • the depth stop 68 has a stop surface 84 which, when the screw-in depth of the screw set by the operator is reached, rests on a surface of a machined workpiece.
  • the stop surface 84 has an annular cross section.
  • the drywall screwdriver has a tool holder 86.
  • the tool holder 86 is formed by a bit holder.
  • the tool holder 86 has a magnetic element 88 in order to hold an insert tool (not shown in more detail) in the tool holder so that it cannot be lost.
  • the tool holder 86 has a receiving area 90.
  • the receiving area 90 is provided to receive the insert tool.
  • the receiving area 90 has a hexagon socket contour (not shown in greater detail). In an inserted state, the insert tool is held non-rotatably in the receiving area 90 of the tool receptacle 86.
  • the output spindle 16 is non-rotatably connected to the tool holder 86.
  • the tool holder 86 is non-rotatably connected to the insert tool inserted therein and transfers the kinetic energy to the insert tool.
  • the coupling unit 20 is provided to couple and / or decouple a torque transmission from the gear unit 14 to the output spindle 16.
  • a gear element 22 of the gear unit 14 is firmly connected to a coupling element 24 of the coupling unit 20.
  • the gear element 22 of the gear unit 14 is formed in one piece with the coupling element 24 of the coupling unit 20.
  • the gear unit 14 comprises a planetary gear 26.
  • the planetary gear 26 of the gear unit 14 is designed in one stage.
  • the transmission unit 14 has a transmission ratio that is between 3 and 10.
  • the coupling element 24 comprises three entrainment elements 30, 32, 34.
  • the entrainment elements 30, 32, 34 are formed in one piece with the planet carrier element 28 of the planetary gear 26.
  • the drive unit 18 comprises a motor spindle 92. In one operating state, the drive unit 18 generates a rotational movement of the motor spindle 92.
  • a gearwheel is arranged on the motor spindle 92.
  • the gear forms a sun gear 94 of the planetary gear 26 of the gear unit 14.
  • the sun gear 94 of the planetary gear 26 meshes with planet gears 96 of the planetary gear 26 in one operating state 96 about an axis of rotation of the sun gear 94, which corresponds to an axis 42 of the gear unit 14.
  • the axis 42 of the gear unit 14 corresponds to an axis 40 of the drive unit 18.
  • the axis 38 of the output spindle 16 corresponds to the axis 40 of the drive unit 18.
  • the axis of rotation of the motor spindle 92 corresponds to the axis 40 of the drive unit 18.
  • the planetary gear 26 has a ring gear 46.
  • the planetary gears 96 mesh with the ring gear 46 of the planetary gear 26.
  • the ring gear 46 of the planetary gear 26 is arranged in the gear housing 56 of the drywall screwdriver in a rotationally fixed manner relative to the housing 10 of the drywall screwdriver.
  • the drywall screwdriver has a support element 44 which differs from a housing element and which engages around the ring gear 46 of the planetary gear 26.
  • the support element 44 is between the ring gear 46 and the housing 10 are arranged.
  • the outer diameter of the support element 44 is accommodated in the gear housing 56 and the motor housing 58 without play.
  • the support element 44 connects the gear housing 56 and the motor housing 58 like a sleeve.
  • the support element 44 is formed by a connecting sleeve.
  • the connecting sleeve is formed by a sheet metal sleeve.
  • the support element 44 engages around the ring gear 46 of the planetary gear 26 with radial and axial play.
  • the ring gear 46 of the planetary gear 26 has at least one projection 48 in the axial direction 62.
  • the projections 48 are integrally formed on a side of the ring gear 46 facing the screw-in depth limiting element 12.
  • the support element 44 has a collar 50 which at least partially extends radially inward and has at least one recess 52.
  • the collar 50 extends inward on a plane which is orthogonal to the axial direction.
  • the collar 50 also has eight recesses 52.
  • the projections 48 of the ring gear 46 engage, through the recesses 52 of the collar 50 of the support element 44, in eight recesses 54 of the gear housing 56, whereby the ring gear 46 is fixed in the circumferential direction (see FIG Figure
  • the planet carrier element 28 is supported directly in the housing via a bearing unit 36.
  • the bearing unit 36 is pressed onto a radial outer surface of the planet carrier element 28.
  • the bearing unit 36 is formed by a roller bearing 102.
  • the outer circumference of the bearing unit 36 is supported directly on an inner surface of the gear housing 56.
  • the bearing unit 36 has an axial movement play with respect to the inner surface of the gear housing 56.
  • the bearing unit 36 is partially supported axially on the collar 50 of the support element 44. In the axial direction 62, the bearing unit 36 is supported on the gear housing 56 on a side facing the screw-in depth limiting element 12.
  • the bearing unit 36 On a side facing away from the screw-in depth limiting element, viewed in the axial direction 62, the bearing unit 36 is supported on the collar 50 of the support element 44.
  • the force can be passed on to the planet carrier element 28 via the coupling unit 20.
  • the axial force can be passed on from the planet carrier element 28 to the bearing unit 36 via an effective pressure.
  • the bearing unit 36 is supported in the axial direction 62 on the collar 50 of the support element 44, as a result of which an axial force is passed on to the support element 44.
  • the support element 44 is axially supported on a Cover plate 60 from.
  • the cover plate 60 is arranged in the motor housing 58.
  • the cover disk 60 is held radially and axially in the motor housing 58 via a groove running around the motor housing 58. As a result, an axial force can be diverted from the support element 44, via the cover disk 60, to the motor housing 58. Accordingly, a force acting axially on the output spindle 16 can be diverted to the motor housing 58.
  • the ring gear 46 and the support element 44 are at least partially axially supported on the cover disk 60.
  • the ring gear 46 and the support element 44 are supported axially on the cover disk 60 on a side facing away from the screw-in depth limiting element, viewed in the axial direction 62.
  • the planet carrier element 28 has three recesses 104, 106, 108 on a side facing the drive unit 18. Three bolts 110 are guided through the three recesses 104, 106, 108. The three planet gears 96 are in turn mounted on the three bolts 110.
  • the planet carrier element 28 also has a recess 112 which runs axially to the axis 38 of the output spindle 16.
  • the output spindle 16 is partially supported and / or guided in the gear element 22 of the gear unit 14.
  • the output spindle 16 is partially supported and guided in the planet carrier element 28 of the planetary gear 26.
  • the output spindle 16 is axially movably guided in the recess 112.
  • the planet carrier element 28 is provided to transmit the rotational movement of the planet gears 96 about the axis of rotation of the sun gear 94 to the clutch unit 20.
  • the coupling unit 20 has a second coupling element 118 and a third coupling element 120.
  • the second coupling element 118 has entrainment elements 122 on a side facing the first coupling element 24 as well as entrainment elements 124 on the side facing away from the first coupling element 24.
  • the third coupling element 120 has one facing the second coupling element 118 Side carrier elements 126 on.
  • the driver elements 30, 32, 34, 122, 124, 126 each protrude in the axial direction.
  • the first coupling element 24 is driven in rotation by the planet carrier element 28 directly from the gear unit 14.
  • the second coupling element 118 is seated axially and movably in the circumferential direction on the collar 114 of the planet carrier element 28 and is in engagement with the first coupling element 24.
  • the third coupling element 120 is fixedly connected to the output spindle 16.
  • a spring element 128 is arranged in the axial direction 62 between the second coupling element 118 and the third coupling element 120.
  • the spring element 128 is designed as a helical spring.
  • the spring element 128 is provided to keep the second coupling element 118 and the third coupling element 120 in a non-actuated state (as in FIG Figure 1 shown) out of engagement.
  • the spring element 128 presses the second coupling element 118 and the third coupling element 120 apart in the axial direction 62.
  • the operator presses the drywall screwdriver in the axial direction 62 against a workpiece.
  • the third coupling element 120 moves towards the second coupling element 118 against a spring force of the spring element 128. If there is contact between the second coupling element 118 and the third coupling element 120, the second coupling element 118 is braked relative to the first coupling element 24. As a result, the second coupling element 118 is pushed onto the ramp-shaped outlets 116 of the first coupling element 24 and moved against the third coupling element 120, as a result of which coupling is supported.
  • the driver elements 30, 32, 34, 122, 124, 126 of the first coupling element 24, the second coupling element 118 and the third coupling element 120 are provided to rest against one another in an actuated state in a circumferential direction of the rotational movement of the gear unit 14.
  • the entrainment elements 30, 32, 34 of the first coupling element 24 transmit the rotational movement of the gear unit 14 to the entrainment elements 122 of the second coupling element 118 and thus to the second coupling element 118.
  • the entrainment elements 124 of the second coupling element 118 are transmitted the rotational movement of the gear unit 14 on the entrainment elements 126 of the third coupling element 120 and thus on the third coupling element 120.
  • the stop surface 84 of the depth stop 68 rests on a surface of the workpiece.
  • the force in the axial direction 62, which the operator exerts on the drywall screwdriver, is transmitted in this state via the depth stop 68 to the workpiece, instead of to an insert tool.
  • the third coupling element 120 which is loaded by the spring element 128, disengages from the second coupling element 118, so that the rotational movement of the gear unit 14 is no longer transmitted to the third coupling element 120 or to an insert tool.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP21173192.2A 2011-06-30 2012-06-04 Tournevis de construction à sec Pending EP3895846A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011078384A DE102011078384A1 (de) 2011-06-30 2011-06-30 Trockenbauschrauber
PCT/EP2012/060486 WO2013000670A1 (fr) 2011-06-30 2012-06-04 Tournevis pour construction à paroi sèche
EP12725751.7A EP2726250B1 (fr) 2011-06-30 2012-06-04 Tournevis pour construction à paroi sèche

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP12725751.7A Division-Into EP2726250B1 (fr) 2011-06-30 2012-06-04 Tournevis pour construction à paroi sèche
EP12725751.7A Division EP2726250B1 (fr) 2011-06-30 2012-06-04 Tournevis pour construction à paroi sèche

Publications (1)

Publication Number Publication Date
EP3895846A1 true EP3895846A1 (fr) 2021-10-20

Family

ID=46208529

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12725751.7A Active EP2726250B1 (fr) 2011-06-30 2012-06-04 Tournevis pour construction à paroi sèche
EP21173192.2A Pending EP3895846A1 (fr) 2011-06-30 2012-06-04 Tournevis de construction à sec

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP12725751.7A Active EP2726250B1 (fr) 2011-06-30 2012-06-04 Tournevis pour construction à paroi sèche

Country Status (5)

Country Link
US (1) US20150209945A1 (fr)
EP (2) EP2726250B1 (fr)
CN (1) CN103635292B (fr)
DE (1) DE102011078384A1 (fr)
WO (1) WO2013000670A1 (fr)

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WO2013000670A1 (fr) 2013-01-03
EP2726250B1 (fr) 2021-08-11
DE102011078384A1 (de) 2013-01-03
CN103635292B (zh) 2016-08-17
CN103635292A (zh) 2014-03-12
US20150209945A1 (en) 2015-07-30
EP2726250A1 (fr) 2014-05-07

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