WO2021160350A1 - Roue dentée et procédé de fabrication d'une roue dentée - Google Patents

Roue dentée et procédé de fabrication d'une roue dentée Download PDF

Info

Publication number
WO2021160350A1
WO2021160350A1 PCT/EP2021/050152 EP2021050152W WO2021160350A1 WO 2021160350 A1 WO2021160350 A1 WO 2021160350A1 EP 2021050152 W EP2021050152 W EP 2021050152W WO 2021160350 A1 WO2021160350 A1 WO 2021160350A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring structure
gear
filling
ring
metallic material
Prior art date
Application number
PCT/EP2021/050152
Other languages
German (de)
English (en)
Inventor
Michael Fischer
Torsten Doll
Markus Feigl
Hendrik JAHNLE
Jan Tremel
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP21700265.8A priority Critical patent/EP4103865A1/fr
Publication of WO2021160350A1 publication Critical patent/WO2021160350A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
    • F16H2055/065—Moulded gears, e.g. inserts therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/0006—Vibration-damping or noise reducing means specially adapted for gearings

Definitions

  • the invention relates to a gear comprising a first ring structure, a second ring structure and a filling structure.
  • the invention also relates to a method for producing the gear and a device comprising the gear.
  • Electric drives especially for vehicles, can be supplied with energy from various energy sources.
  • batteries and fuel cells are known.
  • Batteries are characterized by high dynamics, low charging and discharging losses and the possibility of energy recovery.
  • PEM fuel cells Polymer electrolyte fuel cells, which are also referred to as PEM fuel cells or PEMFCs, are known as fuel cells.
  • Solid oxide fuel cells which are also referred to as SOFC fuel cells, are also described.
  • an internal combustion engine can be dispensed with in electromobility, electrically powered vehicles such as passenger cars (passenger cars), commercial vehicles (commercial vehicles) or buses are significantly quieter than vehicles with internal combustion engines.
  • gears Some components in vehicle construction include transmissions that have gears.
  • the base bodies of the gears are usually produced by casting, milling or turning metal.
  • the teeth of the gears are then shaped by slotting, milling or wire EDM.
  • the geometry of the gears results in a rigid construction.
  • a metallic noise is created which is amplified by the rigid or rigidly constructed gearwheels.
  • Metallic gears in particular act like a sound body and continue to amplify the noise.
  • DE 102014210253 A1 describes a gear for a height-adjustable shelf. A method is shown in which a drive shaft is operated and a rotational movement is transmitted from the drive shaft to a gearwheel.
  • DE 103 26819 A1 is directed to a gearwheel for a steering system transmission.
  • the gear can be used in worm gears or helical gears and in steering systems, in particular in power steering systems, for a motor vehicle.
  • EP 3502 190 A1 relates to an abrasion-resistant polyamide molding compound which can be used as a coating for gear wheels, bearing shells, guide bushings or bearing housings for gears.
  • a gear wheel comprising a first ring structure, a second ring structure and a filling structure, the first ring structure, the second ring structure and the filling structure being arranged concentrically and the Filling structure is arranged between the first ring structure and the second ring structure and wherein the first ring structure and the second ring structure are made of a metallic material and the filling structure is made of a plastic material.
  • the first ring structure, the second ring structure and / or the filling structure being produced and / or cast using an additive method.
  • the first ring structure and the second ring structure are preferably produced using an additive process.
  • the filling structure is preferably cast.
  • the first ring structure and / or the second ring structure can alternatively also be produced by machining or wire EDM.
  • the invention is also directed to an apparatus comprising the gear.
  • the device is preferably an electric drive unit for a vehicle, a parking lock for a vehicle, an electric tool or a household appliance.
  • the device is also preferably a parking lock for an, in particular exclusively, electrically driven vehicle.
  • the first ring structure is preferably an outer ring structure and the second ring structure is preferably an inner ring structure of the gear.
  • the first ring structure preferably has a first diameter and the second ring structure has a second diameter. The first diameter is more preferably larger than the second diameter.
  • the filling structure is preferably designed in the form of a disk, in particular with a central hole. More preferably, the filling structure has a third diameter that is larger than the second diameter and smaller than the first diameter.
  • the diameter is understood to mean, in particular, an average diameter.
  • a cavity is preferably located between the first ring structure and the second ring structure, in which the filling structure is arranged and which, in particular, is filled by the filling structure.
  • the first ring structure and the second ring structure are preferably made of the metallic material.
  • the metallic material is in particular a metal, a metal alloy or an intermetallic compound.
  • the filling structure further preferably consists of the plastic material.
  • the plastic material is in particular a plastic or a mixture containing at least one plastic.
  • the metallic material steel and / or the plastic material preferably contain caprolactam. More preferably, the metallic material consists of steel and / or the plastic material consists of caprolactam.
  • Caprolactam is a raw material for the production of polyamide 6, which is also known as perlon.
  • the plastic material can contain a mixture of caprolactam and another component, such as an elastomer. This leads to a further improved noise-dampening property.
  • the first ring structure preferably has a first outer circumference and a first inner circumference.
  • the second ring structure preferably has a second outer circumference and a second inner circumference.
  • the first ring structure preferably has teeth on the first outer circumference for engaging a further, in particular adjacent, gearwheel for power transmission.
  • the teeth preferably comprise the metallic material, more preferably the teeth consist of the metallic material.
  • the second ring structure in particular on the second inner circumference, preferably has an inner opening for receiving a shaft.
  • the inner opening of the second ring structure is preferably a bore and the shaft is preferably a gear shaft.
  • the first ring structure and the second ring structure are preferably first produced by means of the additive process, such as 3D printing, then optionally aligned with one another and then the cavity between the first ring structure and the second ring structure is filled with the plastic material .
  • the 3D printing gives the first ring structure and the second ring structure a rough surface, whereby a form-fitting connection is preferably formed between the plastic material and the first ring structure and / or the second ring structure. Due to the rough surface, thin plastic materials can also be used. After pouring, the plastic material is preferably hardened. The gear is then reworked and balanced if necessary.
  • the first ring structure and the second ring structure are connected by connecting structures made of the metallic material, the connecting structures each having a wall thickness of less than 3.5 mm.
  • the wall thickness is more preferably in a range from 0.2 mm to 3 mm.
  • the rigidity of the connection structures can be set by choosing the wall thickness.
  • connection structures are arranged in particular in the cavity.
  • the first inner circumference of the first ring structure and the second outer circumference of the second ring structure are preferably connected to one another by the connecting structures.
  • the connection structures are more preferably arranged in the filling structure.
  • connection structures can also be referred to as a bionic inner contour.
  • the connecting structures depict shapes made of, for example, honeycombs, human bones and / or corals.
  • connection structures are preferably produced using an additive manufacturing process such as 3D printing and can be designed flexibly.
  • the cavity between the first ring structure and the second ring structure, in which the connection structures are already present is preferably filled with the plastic material. Since the first ring structure and the second ring structure are already aligned with one another by the connecting structures, alignment can be dispensed with here when pouring.
  • connection structures can each have a closing first and second cover, which are each essentially orthogonal to a Shaft axis are arranged so that a closed inner contour is formed.
  • a pouring device can be dispensed with due to the first and second lid and the closed inner contour, comprising the connecting structures and the first and second lid, can be poured directly with the plastic material.
  • the first ring structure and the second ring structure are separated from one another by the filling structure.
  • the first ring structure and the second ring structure in this embodiment have no connection made of the metallic material.
  • the first inner circumference of the first ring structure and / or the second outer circumference of the second ring structure is preferably completely covered by the filling structure, in particular by the plastic material.
  • the first ring structure on the first inner circumference and / or the second ring structure on the second outer circumference preferably have projections which can also be referred to as bulges, pegs or drivers.
  • the projections can positively transmit forces between the filling structure and the first ring structure and / or the second ring structure.
  • the filling structure preferably has indentations which can also be referred to as notches or recesses and which, in particular, correspond to the projections in terms of their shape.
  • the projections preferably comprise the metallic material, more preferably the projections consist of the metallic material.
  • the projections are in particular T-shaped, which leads to an enlargement of a contact area between the first ring structure or the second ring structure and the filling structure, so that an interlocking between the first ring structure or the second ring structure and the filling structure is made possible.
  • the combination of the first ring structure and the second ring structure with the filling structure made of the plastic material makes it possible to minimize noises that arise from the operation of the gearwheel.
  • a sound body which is formed by metallic elements of the gear, is interrupted, so that in particular a transmission that has the gear runs more quietly.
  • the geometry, in particular of the filling structure and the circumferences of the first ring structure or the second ring structure surrounding the filling structure can be designed freely. More complex components can be manufactured without additional effort, which leads to higher copy protection.
  • additively manufactured components that is to say the first and second ring structure, a rough surface is produced, which enables a good form-fitting connection with liquid plastic and in particular with the filling structure.
  • Figure 2 shows a gear with a first ring structure, a second ring structure and connecting structures
  • Figure 3 shows a first ring structure and a second ring structure for a gear
  • FIG. 4 shows a gear wheel comprising a first ring structure, a second ring structure and a filling structure.
  • Figure 1 shows schematically several gear wheels 1 according to the prior art.
  • the gears 1 are made entirely of a metallic material 9 and cast.
  • the meshing of the rigid teeth 19 of the gearwheels 1 with one another produces a noise that cannot be dampened by the gearwheels 1 made of the metallic material 9.
  • FIG. 2 shows a schematic representation of a gear wheel 1 which has a first ring structure 3 and a second ring structure 5, which are connected to one another by connecting structures 13.
  • the connecting structures 13 have a small wall thickness 15.
  • the connection structures 13, such as the first ring structure 3 and the second ring structure 5, are made of metallic material 9.
  • a plastic material 11 can be poured between the first ring structure 3 and the second ring structure 5, in particular around the connecting structures 13.
  • FIG. 3 shows a schematic illustration of a first ring structure 3 and a second ring structure 5 for a gear wheel 1.
  • the first ring structure 3 has a larger diameter than the second ring structure 5. Furthermore, the first ring structure 3 has a first inner circumference 21 and a first outer circumference 17.
  • the second ring structure 5 has a second outer circumference 23 and an inner opening 27 for receiving a shaft which is enclosed by the second ring structure 5.
  • a cavity 29 is formed between the first ring structure 3 and the second ring structure 5, and the first ring structure 3 has teeth 19 on the first outer circumference 17 which can mesh with an adjacent gear wheel 1.
  • first ring structure 3 on the first inner circumference 21 and the second ring structure 5 on the second outer circumference 23 have projections 25.
  • the projections 25 are T-shaped and protrude into the cavity 29.
  • the first ring structure 3 and the second ring structure 5, including the teeth 19 and the projections 25, consist of the metallic material 9.
  • FIG. 4 shows a schematic representation of a gear wheel 1 which comprises the first ring structure 3 and the second ring structure 5.
  • the cavity 29 is filled here with a plastic material 11 which forms the filling structure 7.
  • the filling structure 7 separates the first ring structure 3 from the second ring structure 5 and encloses the projections 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

L'invention concerne une roue dentée (1) comprenant une première structure annulaire (3), une seconde structure annulaire (5) et une structure de remplissage (7). La première structure annulaire (3), la seconde structure annulaire (5) et la structure de remplissage (7) sont disposées de manière concentrique, et la structure de remplissage (7) est disposée entre la première structure annulaire (3) et la seconde structure annulaire (5), la première structure annulaire (3) et la seconde structure annulaire (5) étant fabriquées à partir d'un matériau métallique (9) et la structure de remplissage (7) étant fabriquée à partir d'un matériau plastique (11). L'invention concerne en outre un procédé de fabrication de la roue dentée (1) et un dispositif comprenant la roue dentée (1).
PCT/EP2021/050152 2020-02-12 2021-01-07 Roue dentée et procédé de fabrication d'une roue dentée WO2021160350A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21700265.8A EP4103865A1 (fr) 2020-02-12 2021-01-07 Roue dentée et procédé de fabrication d'une roue dentée

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020201726.3A DE102020201726A1 (de) 2020-02-12 2020-02-12 Zahnrad und Verfahren zur Herstellung eines Zahnrads
DE102020201726.3 2020-02-12

Publications (1)

Publication Number Publication Date
WO2021160350A1 true WO2021160350A1 (fr) 2021-08-19

Family

ID=74183143

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/050152 WO2021160350A1 (fr) 2020-02-12 2021-01-07 Roue dentée et procédé de fabrication d'une roue dentée

Country Status (3)

Country Link
EP (1) EP4103865A1 (fr)
DE (1) DE102020201726A1 (fr)
WO (1) WO2021160350A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200665A (en) * 1963-02-14 1965-08-17 Wells Martin Gears
DE10326819A1 (de) 2003-06-13 2004-12-30 Zf Lenksysteme Gmbh Zahnrad für ein Lenksystem-Getriebe
DE102007002959A1 (de) * 2006-01-20 2007-08-23 Arc Leichtmetallkompetenzzentrum Ranshofen Gmbh Verbund-Zahntriebteil
DE102013017482A1 (de) * 2013-10-21 2015-04-23 Audi Ag Zahnrad sowie Verfahren zum Herstellen eines Zahnrads
DE102014210253A1 (de) 2014-05-28 2015-12-03 Aktiebolaget Skf Getriebe für eine in einer Höhe verstellbare Ablage sowie Verfahren zum Verändern einer Höhe einer Ablage
EP3502190A1 (fr) 2017-12-22 2019-06-26 EMS-Patent AG Masse de formage en polyamide abrasive

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200665A (en) * 1963-02-14 1965-08-17 Wells Martin Gears
DE10326819A1 (de) 2003-06-13 2004-12-30 Zf Lenksysteme Gmbh Zahnrad für ein Lenksystem-Getriebe
DE102007002959A1 (de) * 2006-01-20 2007-08-23 Arc Leichtmetallkompetenzzentrum Ranshofen Gmbh Verbund-Zahntriebteil
DE102013017482A1 (de) * 2013-10-21 2015-04-23 Audi Ag Zahnrad sowie Verfahren zum Herstellen eines Zahnrads
DE102014210253A1 (de) 2014-05-28 2015-12-03 Aktiebolaget Skf Getriebe für eine in einer Höhe verstellbare Ablage sowie Verfahren zum Verändern einer Höhe einer Ablage
EP3502190A1 (fr) 2017-12-22 2019-06-26 EMS-Patent AG Masse de formage en polyamide abrasive

Also Published As

Publication number Publication date
EP4103865A1 (fr) 2022-12-21
DE102020201726A1 (de) 2021-08-12

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