WO2002006006A1 - Machine-outil a main comprenant un dispositif de retour destine a l'agent lubrifiant du mecanisme d'engrenage - Google Patents

Machine-outil a main comprenant un dispositif de retour destine a l'agent lubrifiant du mecanisme d'engrenage Download PDF

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Publication number
WO2002006006A1
WO2002006006A1 PCT/DE2001/001281 DE0101281W WO0206006A1 WO 2002006006 A1 WO2002006006 A1 WO 2002006006A1 DE 0101281 W DE0101281 W DE 0101281W WO 0206006 A1 WO0206006 A1 WO 0206006A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring gear
gear
hand tool
tool according
conveying element
Prior art date
Application number
PCT/DE2001/001281
Other languages
German (de)
English (en)
Inventor
Albert Kleider
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2002006006A1 publication Critical patent/WO2002006006A1/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
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/36—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with feed by pumping action of the member to be lubricated or of a shaft of the machine; Centrifugal lubrication
    • F16N7/363—Centrifugal lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • 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
    • 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
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0463—Grease lubrication; Drop-feed lubrication
    • F16H57/0464—Grease lubrication

Definitions

  • the invention relates to a hand tool, in particular an angle grinder, according to the preamble of claim 1.
  • the consequences of insufficient lubrication are increased gear wear, increased noise and reduced
  • the hand tool according to the invention with the characterizing features of claim 1 has the advantage that the lubrication of the transmission is improved by simple, inexpensive means that the tooth flanks of the gears are better wetted with lubricant, with a loss of lubricant due to leakage between the ring gear and the housing is avoided.
  • the improvement in lubrication leads to longer transmission life and noise reduction.
  • the return conveyor prevents lubricant from seeping through by throwing back with the onset of the lubrication circuit in the area of the tooth flanks of the gearbox, in particular the ring gear, and the lubricant mist that occurs there, through which the tooth flanks of the gear wheels are better wetted with lubricant.
  • FIG. 1 is a schematic partial longitudinal section of a hand tool, which is designed as an angle grinder,
  • Fig. 2 is a schematic plan view of only the ring gear of the
  • FIG. 3 shows a schematic side view in the direction of arrow III in FIG. 2 of part of the ring gear
  • FIG. 4 shows a schematic side view roughly corresponding to that in FIG. 3 of a ring gear according to a second exemplary embodiment
  • FIG. 5 shows a schematic section along the line V-V in FIG. 4,
  • Fig. 6 is a schematic side view approximately corresponding to that in Fig. 4 of part of a ring gear according to a third
  • FIG. 7 shows a schematic section along the line Vll-Vll in FIG. 6.
  • a hand tool 10 which here as an angle grinder, for. B. is designed as a concrete grinder.
  • the handheld power tool 10 has a housing 11, which consists of a Motor housing 12 and a gear housing 13 attached to it
  • Neck portion 14 is formed in the housing 11, an electric motor 15 and
  • Embodiment consists of an angular gear, which has a conical pinion 17 driven by the motor 15 and a ring gear 18 in engagement with the latter in the form of a bevel gear.
  • the ring gear 18 drives a work spindle 19 which is coaxial with it and oriented approximately at right angles to the longitudinal center axis of the pinion 17 and which is rotatable in the housing 11 via an upper spindle bearing 20 and a lower spindle bearing 21, specifically in the
  • Gear housing 13 or neck part 14 is mounted. At an axial distance below the spindle bearing 20, two axially spaced sealing lips 22 and 23 are arranged in the neck part 14, which are seated on the work spindle 19, the
  • Gap between the sealing lips 22, 23 with lubricant in particular
  • the work spindle 19 carries a support flange 25 which rotates with it.
  • a spindle nut 27 is screwed onto a threaded section 26, by means of which a tool 28, for example a grinding wheel, is pressed against the support flange 25 and between the spindle nut 27 and the Support flange 25 is releasably attached.
  • the neck part 14 is encompassed by the flange 29 of a protective hood 30 which is fastened to the neck part 14 axially by means not shown, for example screws.
  • the protective hood 30 can also be omitted or instead extend only over a circumferential part and / or be designed in some other way.
  • the hand-held power tool 10 in the form of an angle grinder is shown in FIG. 1 in a position that roughly corresponds to the typical working posture in use, in which the work spindle 19 runs essentially vertically.
  • Gear 16 is provided with a suitable lubricant, in particular grease, the lubricant being intended to ensure lubrication over the entire service life of handheld power tool 10.
  • a suitable lubricant in particular grease
  • the lubricant being intended to ensure lubrication over the entire service life of handheld power tool 10.
  • the lubricant, in particular grease is thrown radially outwards by the ring gear 18 and seeps through the annular gap 33 formed between the outer peripheral surface 31 of the ring gear 18 and the adjacent wall 32 of the housing 11, in particular the gear housing 13, and passes under the ring gear 18 and is lost in the lubrication process. For this reason, there is a risk of inadequate lubrication of the gear 16 in known hand power tools.
  • the return conveyor 40 is generally associated with the gear 16 and in particular with the ring gear 18.
  • the return conveyor 40 has at least one conveyor element 41 which is driven by a gear part, in particular by the ring gear 18, and thus rotates.
  • three conveying elements 41 can be provided, which are arranged, for example, at the same circumferential angular distances from one another on the ring gear 18 and are each of identical design.
  • the at least one conveying element 41 acts as a centrifugal element and in such a way that the 1 at least one conveying element 41 in the rotary drive of the ring gear 18 has a backward throwing action in the case of lubricant, in particular grease, in FIG. 1 and in this way a lubrication circuit with the resulting lubricant mist is generated, as a result of which the tooth flanks
  • the at least one conveying element 41 throws any lubricant, which could seep down through the annular gap 33, in the opposite direction upwards in the outer edge region of the ring gear 18, so that the lubricant reaches the teeth of the ring gear 18 from above and thereby also with them Lubricant be well wetted.
  • Lubricant be well wetted.
  • the ring gear 18 is at least on a partial area of the outer circumferential surface 31 from the housing section in the form of the wall 32 with a small radial distance below
  • the at least one conveying element 41 is an integral part of the ring gear 18, 25 which e.g. consists of a sintered part, so that when producing this sintered part, the at least one conveying element 41 can be molded on in a simple and inexpensive manner.
  • the ring gear 18 is formed from plastic, in which case the at least one conveying element 41 can also be an integral part of the ring gear 18, since it can also be molded on inexpensively in the shaping of a plastic part.
  • the 35 at least one conveying element 41 is designed as a separate component and on Ring gear 18, in the same way on its outer peripheral surface 31, fastened, for example detachably or permanently.
  • the attachment can be done by gluing, fastening means, pressing on, pressing in or in any other suitable manner, the at least one conveying element 41 also being able to sit on a ring part which is firmly attached to the outer peripheral surface 31 of the ring gear 18.
  • the at least one conveying element 41 can also be injection molded or injected in plastic, in particular when designing the ring gear 18.
  • the at least one conveying element 41 is formed from at least one projection 42 of the ring gear 18, which protrudes radially beyond the outer peripheral surface 31 of the ring gear 18. It can be seen from FIG. 2 that a total of three such projections 42 are provided.
  • Each conveying element 41 in particular in the form of the radial projection 42, has an inclined surface 43.
  • the inclined surface 43 is located on the front side of the conveying element 41, in particular the projection 42, which runs in the front when the ring gear 18 rotates according to arrow 44.
  • the inclined surface 43 rises against the direction of rotation according to arrow 44, that is to say viewed from left to right in FIG.
  • Inclined surface 43 during the rotation of the ring gear 18 in the direction of arrow 44 results in the lubricant hitting it being thrown upward.
  • the described return conveyor 40 has the advantage that the
  • the return device 40 is simple and inexpensive.
  • the conveying elements 41, in particular projections 42, can be optimally designed with regard to the respective arrangement and / or with respect to the course of the respective inclined surface 43 in such a way that lubricants are effectively thrown back and hurled upward from the area of the annular gap 33.
  • the same reference numerals are used for the parts which correspond to the first exemplary embodiment, so that reference is made to the description of the first exemplary embodiment in order to avoid repetition.
  • FIGS. 1 the exemplary embodiment in FIGS.
  • the at least one conveying element 41 is formed from a thread 46 recessed into the outer circumferential surface 31 of the ring gear 18, namely from at least one thread.
  • This thread 46 in conjunction with a narrow annular gap 33, also acts as a return device 40 for the lubricant, in particular grease, and is advantageous in the same way as the return device 40 according to the first exemplary embodiment.
  • the return device 40 in contrast to FIGS. 4 and 5, has a radially projecting circumferential rib on the outer circumferential surface 31 of the ring gear 18, which rib runs analogously to a thread with a slope. Instead of one thread, several threads can also be provided.
  • the return conveyor device 40 has at least one rib 47 as at least one conveyor element 41, which also protrudes radially over the peripheral surface 31 and runs obliquely approximately like a wing.
  • the at least one rib 47 is provided with an inclined surface 43 at least on its front surface pointing in the direction of rotation according to arrow 44. It goes without saying that a plurality of such ribs 47 can be arranged in the circumferential direction of the ring gear 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Details Of Gearings (AREA)

Abstract

La présente invention concerne une machine-outil à main, notamment une meuleuse d'angle, présentant un boîtier (11), qui comprend un moteur (15) et un mécanisme d'engrenage (16) présentant une couronne de différentiel (18) qui permet d'entraîner un arbre moteur (19) permettant lui-même d'entraîner un outil (28). Ledit mécanisme d'engrenage (16) comprend un dispositif de retour (40), destiné à l'agent lubrifiant du mécanisme d'engrenage (16), notamment à sa graisse, ledit dispositif présentant au moins un élément de transport (41), qui tourne avec la couronne de différentiel (18), présente une surface avant inclinée (43) et permet de remettre en circulation l'agent lubrifiant et de produire un circuit de lubrification dans la zone des dents de la couronne de différentiel (18).
PCT/DE2001/001281 2000-07-15 2001-04-03 Machine-outil a main comprenant un dispositif de retour destine a l'agent lubrifiant du mecanisme d'engrenage WO2002006006A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000134466 DE10034466A1 (de) 2000-07-15 2000-07-15 Handwerkzeugmaschine
DE10034466.6 2000-07-15

Publications (1)

Publication Number Publication Date
WO2002006006A1 true WO2002006006A1 (fr) 2002-01-24

Family

ID=7649050

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/001281 WO2002006006A1 (fr) 2000-07-15 2001-04-03 Machine-outil a main comprenant un dispositif de retour destine a l'agent lubrifiant du mecanisme d'engrenage

Country Status (2)

Country Link
DE (1) DE10034466A1 (fr)
WO (1) WO2002006006A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1903231A2 (fr) * 2006-09-20 2008-03-26 HILTI Aktiengesellschaft Joint de roulement d'arbre
CN111699334A (zh) * 2018-02-09 2020-09-22 日东工器株式会社 齿轮结构体、和具有齿轮结构体的马达组装体以及动力工具

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE523815C2 (sv) * 2002-05-22 2004-05-18 Atlas Copco Tools Ab Portabelt kraftverktyg med fettsmord vinkelväxel med separat fettomfördelningselement
US8087977B2 (en) 2005-05-13 2012-01-03 Black & Decker Inc. Angle grinder
US7988538B2 (en) 2006-10-13 2011-08-02 Black & Decker Inc. Large angle grinder
JP5579575B2 (ja) * 2010-11-02 2014-08-27 株式会社マキタ ディスクグラインダ
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch
CN111872803A (zh) * 2020-07-14 2020-11-03 张家港市创基机械设备制造有限公司 一种手持式砂磨机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990014535A1 (fr) * 1989-05-20 1990-11-29 Robert Bosch Gmbh Outil a main comportant un carter de protection a bague d'etancheite
EP0925882A2 (fr) * 1997-12-01 1999-06-30 Black & Decker Inc. Outil motorisé avec système de lubrification

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990014535A1 (fr) * 1989-05-20 1990-11-29 Robert Bosch Gmbh Outil a main comportant un carter de protection a bague d'etancheite
EP0925882A2 (fr) * 1997-12-01 1999-06-30 Black & Decker Inc. Outil motorisé avec système de lubrification

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1903231A2 (fr) * 2006-09-20 2008-03-26 HILTI Aktiengesellschaft Joint de roulement d'arbre
EP1903231A3 (fr) * 2006-09-20 2009-04-29 HILTI Aktiengesellschaft Joint de roulement d'arbre
CN111699334A (zh) * 2018-02-09 2020-09-22 日东工器株式会社 齿轮结构体、和具有齿轮结构体的马达组装体以及动力工具
AU2019216845B2 (en) * 2018-02-09 2021-07-29 Nitto Kohki Co., Ltd. Gear structure, and motor assembly and powered tool each having gear structure
CN111699334B (zh) * 2018-02-09 2023-07-28 日东工器株式会社 齿轮结构体、和具有齿轮结构体的马达组装体以及动力工具

Also Published As

Publication number Publication date
DE10034466A1 (de) 2002-01-24

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