EP1300218A1 - Outil - Google Patents

Outil Download PDF

Info

Publication number
EP1300218A1
EP1300218A1 EP02256865A EP02256865A EP1300218A1 EP 1300218 A1 EP1300218 A1 EP 1300218A1 EP 02256865 A EP02256865 A EP 02256865A EP 02256865 A EP02256865 A EP 02256865A EP 1300218 A1 EP1300218 A1 EP 1300218A1
Authority
EP
European Patent Office
Prior art keywords
worktool
axis
planetary gears
drive shaft
carriage
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.)
Withdrawn
Application number
EP02256865A
Other languages
German (de)
English (en)
Inventor
Matthew c/o The Technology Partnership plc Carr
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.)
Technology Partnership PLC
Original Assignee
Technology Partnership PLC
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 Technology Partnership PLC filed Critical Technology Partnership PLC
Publication of EP1300218A1 publication Critical patent/EP1300218A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools
    • 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
    • B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces

Definitions

  • This invention relates to worktools and, in particular, rotating worktools that engage with a surface, such as sanders and polishing machines.
  • Known orbital and random-orbital worktools such as sanders, function by driving an abrasive surface in a circular path about principal drive shaft.
  • a surface may be of fixed orientation or free to rotate about an eccentric axis, according to whether the resulting motion is required to be orbital, or random-orbital respectively.
  • Such work tools suffer from vibration. Vibration in such systems has two distinct components, dynamic (which results from unbalanced centripetal acceleration) and frictional (which results from the translating frictional forces between the working surface of the tool and the work piece).
  • Dynamic imbalance can normally be corrected by distributing counter weights at particular axial, radial and phase positions on the drive axis of the worktool.
  • this approach relies on the working surface of the tool, such as the sanding platen, and any attached replacement component being of constant mass. This means that changing the platen or replacing the working material can often cause unwanted vibration.
  • Vibration experienced in use also often arises from translating frictional forces between the abrasive surface, acting so as to make the eccentric drive axis the centre of rotation. In the worst case, these vibrations can be of an amplitude equal to the shaft eccentricity, in the case that the principal drive shaft orbits the stationary eccentric shaft.
  • Frictional vibration increases with increasing contact force, resulting in a reduction of sanding efficiency that tends to zero as the amplitude of vibration tends to the eccentricity of the drive axis.
  • a common misconception is that by increasing the contact force an increase in material removal rate can be achieved.
  • counter-intuitive system behaviour in prior-art solutions often results in poor sanding efficiency, and high levels of vibration. It is the aim of the present invention to markedly reduce vibration arising from translating frictional forces, by ensuring that such forces are reacted within a system of sanding surfaces, thereby increasing the sanding efficiency and rate of material removal that can be achieved.
  • a worktool comprising: a principal drive shaft with a sun gear attached thereto; at least two planetary gears distributed about the circumference of the sun gear at substantially equal angular separation; and a carriage for constraining the planetary gears such that they maintain their angular separation about the axis of the principal drive shaft, wherein: each planetary gear has an eccentric axis in addition to its rotational axis constrained by the carriage, such that each planetary gear can drive, in use, a platen around the respective eccentric axis.
  • the platens may be freely rotating, or partially constrained from rotating with respect to the carriage thereby fixing the orientation of the platens with respect to one another. Partially constraining the platens in this way permits the use of tessellating platen configurations.
  • the worktool may be a sander or a polisher.
  • the principal drive shaft may be connected, optionally through an additional gear mechanism, to an electric motor.
  • the eccentric axes In order to preserve the dynamic balance of the system, and to ensure that the frictional forces that might cause vibration are mutually resolved, the eccentric axes have a particular phase relationship.
  • the phase difference between any two eccentric axes may be chosen to be 2 ⁇ / n radians, wherein n equals the number of planetary gears and is an integer value greater than 1. This relationship ensures that the centre of mass of the combined system does not depart from the principal axis of rotation.
  • the arrangement of sanding elements is dynamically balanced, removing the need for the system of counterweights common in conventional sanders.
  • the sanding platens and abrasive surfaces can also be replaced without unduly compromising the dynamic balance.
  • the present invention can be configured to be operable in a number of modes, optimising the motion for a given sanding operation or spatial constraint.
  • Figures 1 and 2 are isometric and plan views of a work tool according to the present invention.
  • Figure 3 is a plan view of a device according to the present invention, with an additional gear shown.
  • Figure 4 is a plan view showing alternative configurations of the platens only.
  • FIG. 1 there is shown a principal drive shaft 1 and carriage 4, of a worktool, such as a sander, to which a sun gear 2 is attached.
  • a number of planetary gears 3 are distributed about the circumference of the sun gear 2 at equal angular separation.
  • the planetary gears 3 are constrained by a carriage 4, locating the centres and maintaining the angular separation about the principal axis of the drive shaft 1.
  • Each planetary gear 3 has an eccentric axis 5, in addition to the centre of rotation constrained by the carriage 4, driving a freely rotating or partially rotationally constrained platen 6.
  • each of the platens 8 or 9 can be attached to a respective eccentric axis 5, instead of the circular platen 6 shown in figure 1.
  • a square platen 10 can be attached to each of the respective eccentric axes 5.
  • the platens 6 will orbit a fixed centre, with no bulk rotation of the combined system. This constitutes a mode of operation suitable for sanding an inside corner that would be inaccessible by an equivalent single sanding platen of an area equal to the sum of the platen areas.
  • Figure 3 shows an optimal additional gear 7 composed inwardly facing teeth with engage with each of the planetary gears and is concentric with the principal drive axis 1.
  • this additional gear 7 is free to rotate, the above modes are accessible.
  • the platen centres will be driven in a strictly epicyclic motion. This would result in higher surface to surface speeds, and a corresponding increase in the rate of material removal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP02256865A 2001-10-02 2002-10-02 Outil Withdrawn EP1300218A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0123657.9A GB0123657D0 (en) 2001-10-02 2001-10-02 Worktool
GB0123657 2001-10-02

Publications (1)

Publication Number Publication Date
EP1300218A1 true EP1300218A1 (fr) 2003-04-09

Family

ID=9923108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02256865A Withdrawn EP1300218A1 (fr) 2001-10-02 2002-10-02 Outil

Country Status (3)

Country Link
US (1) US20030064670A1 (fr)
EP (1) EP1300218A1 (fr)
GB (1) GB0123657D0 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2399615A (en) * 2003-03-21 2004-09-22 Black & Decker Inc A vibration reduction apparatus for a power tool and a power tool incorporating such apparatus
WO2004085114A1 (fr) * 2003-03-28 2004-10-07 The Technology Partnership Plc Outil rotatif possedant des engrenages planetaires en orbite contenant des axes excentriques servant a fixer des plaques de polissage ou de sablage
EP1586416A2 (fr) 2004-04-16 2005-10-19 Positec Power Tools (Suzhou) Co., Ltd. Dispositif anti-vibration
US7104873B1 (en) 2005-04-18 2006-09-12 Positec Power Tools (Suzhou) Co. Anti-vibration arrangement
WO2007000074A1 (fr) * 2005-06-27 2007-01-04 Positec Power Tools (Suzhou) Co., Ltd. Dispositif anti-vibration pour machine abrasive, machine comportant ledit dispositif et procédé de nettoyage de surface de pièce de fabrication
CN109366100A (zh) * 2018-10-31 2019-02-22 南京新尼亚文汽车零部件有限公司 一种高效便于操作的一体化压盘生产机构

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7022004B2 (en) * 2002-01-08 2006-04-04 Boehler Daniel Device for the treatment/working of surfaces
ATE362420T1 (de) * 2003-04-09 2007-06-15 Guenther Boehler Gmbh Vorrichtung zur bearbeitung von oberflächen
FR2874530B1 (fr) * 2004-09-02 2006-12-29 Inoplast Sa Materiau plastique utilisable notamment pour realiser des planchers de vehicules automobiles et plancher de vehicule automobile realise avec un tel materiau
CN100460154C (zh) * 2005-05-24 2009-02-11 蔡墩军 双三爪形状对转行星磨头
CN107855886A (zh) * 2017-11-02 2018-03-30 广东工科机电有限公司 干式柔性磨抛方法及其配套刀具、设备
CN108789111A (zh) * 2018-08-14 2018-11-13 天长市永鑫制冷设备有限公司 简易型抛光装置
EP3902655B1 (fr) * 2018-12-27 2024-02-07 Robert Bosch GmbH Machine-outil portative

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH237159A (de) * 1943-08-19 1945-04-15 Buehler Ag Geb Fussbodenreinigungsgerät.
DE930948C (de) * 1948-09-25 1955-07-28 Mueller Bruetsch & Co Maschine zum Reinigen von Fussboeden
US2759305A (en) * 1954-06-11 1956-08-21 Cyclo Mfg Company Portable abrading and polishing machine
DE1158674B (de) * 1959-07-29 1963-12-05 Mauz & Pfeiffer Mehrscheibenbohnermaschine
US4097950A (en) * 1977-03-07 1978-07-04 Milliken Research Corporation Device for scrubbing surfaces

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US757053A (en) * 1903-09-03 1904-04-12 Claude Louis Rameau Machine for grinding lenses.
US2668968A (en) * 1949-01-05 1954-02-16 Joseph M Dobrowolski Meat block scrubber
US3631635A (en) * 1969-11-07 1972-01-04 Kenneth W Vezner Grinding and polishing machine
JPS5226345B2 (fr) * 1972-10-05 1977-07-13
EP0189617B1 (fr) * 1985-01-22 1991-10-02 Giovanni Todescato Ponceuse et polisseuse de plancher

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH237159A (de) * 1943-08-19 1945-04-15 Buehler Ag Geb Fussbodenreinigungsgerät.
DE930948C (de) * 1948-09-25 1955-07-28 Mueller Bruetsch & Co Maschine zum Reinigen von Fussboeden
US2759305A (en) * 1954-06-11 1956-08-21 Cyclo Mfg Company Portable abrading and polishing machine
DE1158674B (de) * 1959-07-29 1963-12-05 Mauz & Pfeiffer Mehrscheibenbohnermaschine
US4097950A (en) * 1977-03-07 1978-07-04 Milliken Research Corporation Device for scrubbing surfaces

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2399615A (en) * 2003-03-21 2004-09-22 Black & Decker Inc A vibration reduction apparatus for a power tool and a power tool incorporating such apparatus
GB2399615B (en) * 2003-03-21 2006-03-15 Black & Decker Inc Vibration reduction apparatus for power tool and power tool incorporating such apparatus
WO2004085114A1 (fr) * 2003-03-28 2004-10-07 The Technology Partnership Plc Outil rotatif possedant des engrenages planetaires en orbite contenant des axes excentriques servant a fixer des plaques de polissage ou de sablage
EP1586416A2 (fr) 2004-04-16 2005-10-19 Positec Power Tools (Suzhou) Co., Ltd. Dispositif anti-vibration
EP1586416A3 (fr) * 2004-04-16 2006-04-12 Positec Power Tools (Suzhou) Co., Ltd. Dispositif anti-vibration
US7104873B1 (en) 2005-04-18 2006-09-12 Positec Power Tools (Suzhou) Co. Anti-vibration arrangement
WO2007000074A1 (fr) * 2005-06-27 2007-01-04 Positec Power Tools (Suzhou) Co., Ltd. Dispositif anti-vibration pour machine abrasive, machine comportant ledit dispositif et procédé de nettoyage de surface de pièce de fabrication
CN109366100A (zh) * 2018-10-31 2019-02-22 南京新尼亚文汽车零部件有限公司 一种高效便于操作的一体化压盘生产机构

Also Published As

Publication number Publication date
US20030064670A1 (en) 2003-04-03
GB0123657D0 (en) 2001-11-21

Similar Documents

Publication Publication Date Title
US20060194528A1 (en) Rotary work tool with orbiting planetary gears containing eccentric axes for the attachment of polishing or sanding platens
EP1300218A1 (fr) Outil
US6009767A (en) Same-RPM rotary motion to eccentric rotary motion conversion
EP1586416B1 (fr) Dispositif anti-vibration
JP2558256B2 (ja) 振動グラインダ
US7104873B1 (en) Anti-vibration arrangement
US6159084A (en) Electrical hand-power tool, in particular hand grinder
CN109940562B (zh) 手导和/或手持电动或气动动力工具
EP3646987B1 (fr) Outil électrique de ponçage ou de polissage orbital aléatoire portatif, guidé à la main
EP2127808A1 (fr) Outil électrique
CN113043133B (zh) 打磨工具
US6062960A (en) Orbital tool
JPWO2002046641A1 (ja) バランサー
RU2469831C2 (ru) Ручная машина с автоматическим балансировочным приспособлением
CN1288406A (zh) 电动手控磨削机
CN106573388B (zh) 振荡驱动装置
JP3498998B2 (ja) 多機能研磨装置
EP0997113B1 (fr) Tour électrique oscillant utilisé en prosthodontie
JP3498999B2 (ja) 多機能研磨装置
CA2290057C (fr) Ensemble de vibroabrasion
KR200205478Y1 (ko) 귀금속 표면 가공기
US20240342851A1 (en) Dynamic mass balancer for a rotating power tool
RU2224076C1 (ru) Бурильная машина
SU1458178A1 (ru) Вибрационный шлифовальный станок
JP2005007532A (ja) 回転テーブル装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20030925

AKX Designation fees paid

Designated state(s): AT BE BG

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20031201

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20040414