EP3421173A1 - Schleifmaschine - Google Patents

Schleifmaschine Download PDF

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Publication number
EP3421173A1
EP3421173A1 EP17178101.6A EP17178101A EP3421173A1 EP 3421173 A1 EP3421173 A1 EP 3421173A1 EP 17178101 A EP17178101 A EP 17178101A EP 3421173 A1 EP3421173 A1 EP 3421173A1
Authority
EP
European Patent Office
Prior art keywords
pressure
gas
grinding machine
grinding
cavity
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.)
Granted
Application number
EP17178101.6A
Other languages
English (en)
French (fr)
Other versions
EP3421173B1 (de
EP3421173B8 (de
Inventor
Bach Pangho Chen
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.)
Xpole Precision Tools Inc
Original Assignee
Xpole Precision Tools Inc
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 Xpole Precision Tools Inc filed Critical Xpole Precision Tools Inc
Priority to EP17178101.6A priority Critical patent/EP3421173B8/de
Publication of EP3421173A1 publication Critical patent/EP3421173A1/de
Publication of EP3421173B1 publication Critical patent/EP3421173B1/de
Application granted granted Critical
Publication of EP3421173B8 publication Critical patent/EP3421173B8/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B24B23/026—Fluid driven
    • 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
    • B24B23/028—Angle 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
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided

Definitions

  • the present invention relates to a grinding machine, and particularly to a grinding machine that forms a positive pressure environment between a grinding machine body and a grinding disc to eliminate invasion of dust and moisture.
  • the dust sucking structure sucks dust generated during a process of grinding a material under grinding, as disclosed in TW 439616 , CN 1748939 , US 6,802,766 , US 7,722,438 , JP5760892 , JP5696488 , JP5682410 , JP2014217920 , JP2014124752 , JP2014039975 , JP2012210691 , EP2479001 , EP3028811 and EP2611573 patents.
  • a grinding environment of the grinding machine is not limited to only dry grinding but also includes wet grinding. If wet grinding is performed using conventional technologies of the above patents, moisture or water, which is not easy to clean, may be drawn by the dust and enter the grinding machine. If the grinding machine is disassembled to allow moisture or water to evaporate each time the grinding machine is used after grinding, more grinding machines need to be purchased in order to use the grinding machines in turn, leading to increased costs. Further, disassembling the grinding machines also causes a waste in working hours. In addition, industries today are gradually evolving into implementation conducted by robots, and working hours of the robots may be reduced if grinding machines installed on the robots need to be disassembled from the robots in the long run.
  • the present invention provides a grinding machine including a grinding machine body and a grinding disc connected to the grinding machine body.
  • the grinding machine body is provided with a pressure cavity at a position facing the grinding disc, and a gas intake pipe corresponding to the pressure cavity.
  • a pressure release gap in communication with the pressure cavity is formed between the grinding machine body and the grinding disc.
  • the gas intake pipe induces a high-pressure gas into the pressure cavity.
  • the pressure cavity receives an effect of the high-pressure gas to cause its internal pressure to be greater than the pressure outside the grinding machine body, such that the pressure cavity becomes a positive-pressure environment.
  • the pressure cavity is in communication with the pressure release gap to allow the high-pressure gas to be continually released via the pressure release gap, so as to prohibit external dust from entering the pressure cavity.
  • the gas intake pipe is connected to an external gas source, and receives the high-pressure gas from the external gas source.
  • the grinding machine body includes a host housing and a cover body connected to the host housing.
  • the gas intake pipe is disposed on the cover body, which defines the pressure cavity and has its one side facing the grinding disc appear hollow to allow the high-pressure gas to flow towards the pressure release gap.
  • the cover body includes a first end connected to the host housing and a second end facing the grinding disc.
  • the size of the second end is greater than the size of the first end.
  • the grinding machine body includes a connecting member, which is disposed in the cover body and causes the grinding disc to be linked with a power assembly disposed in the host housing.
  • the grinding machine body includes the host housing and a gas guiding pipe.
  • the host housing includes a cavity for disposing the power assembly, a gas intake channel in communication with the cavity and receiving the high-pressure gas from the external gas source, and a gas output channel in communication with the cavity and discharging the high-pressure gas out of the cavity.
  • the gas guiding pipe has its two ends respectively connected to the gas output channel and the gas intake channel to guide the high-pressure gas into the pressure cavity.
  • the grinding machine body includes a regulating valve connected to the gas output channel and the gas guiding pipe.
  • the grinding machine body includes a coupling tube.
  • the coupling tube includes a first channel connected to the gas output channel and the gas guiding pipe, and a second channel branched from and in communication with the first channel and causing a part of the high-pressure gas to be released.
  • the coupling tube includes a deflation control member disposed in the second channel.
  • the deflation control member includes a plug body and a through hole disposed on the plug body.
  • the present invention includes following features compared to the prior art.
  • the pressure cavity becomes a positive-pressure environment because of the high-pressure gas, and the high-pressure is caused to be discharged via the pressure release gap, such that not only dust is prohibited from entering the pressure cavity but also the pressure cavity is kept dry.
  • components of the grinding machine disposed in the pressure cavity are provided with better heat dissipation.
  • the high-pressure gas drives the airflow around the grinding machine to further prohibit the dust from entering the pressure cavity.
  • the present invention provides a grinding machine 10, which primarily includes a grinding machine body 11 and a grinding disc 12 connected to the grinding machine body 11.
  • the grinding machine body 11 is provided with a pressure cavity 13 at a position facing the grinding disc 12, and a gas intake pipe 111 corresponding to the pressure cavity 13.
  • the gas intake pipe 111 is in communication with the pressure cavity 13.
  • a lower edge of the grinding machine body 11 is not closely connected to the grinding disc 12, so as to form a pressure release gap 14 in communication with the pressure cavity 13.
  • the grinding machine body 11 has its one side facing the grinding disc 12 designed as recessed to form the pressure cavity 13. That is to say, the pressure cavity 13 and the pressure release gap 14 are in fact in communication.
  • the grinding machine body 11 includes a host housing 112 and a cover body 113 connected to the host housing 112.
  • the cover body 113 is not in close contact with the grinding disc 12, so as to form the pressure release gap 14.
  • the cover body 113 may appear slightly similar to an umbrella to define the pressure cavity 13, and has its one side facing the grinding disc 12 appear hollow to cause the pressure cavity 13 to be in direct communication with the pressure release gap 14.
  • the cover body 113 includes a first end 114 connected to the host housing 112, and a second end 115 connected to and facing the grinding disc 12. In one embodiment, the size of the second end 115 is greater than the size of the first end 114, as shown in Fig. 2 .
  • the grinding machine body 11 includes a connecting member 116, which is disposed at the cover body 113 and causes the grinding disc 12 to be linked with a power assembly 15 disposed in the host housing 112. Further, the connecting member 116 is installed on a transmission shaft 151 of the power assembly 15. When the power assembly 15 is activated and rotates, the transmission shaft 151 drives the connecting member 116 to rotate to further rotate the grinding disc 12. Further, the connecting member 116 may be a counterweight to stabilize the rotation of the grinding disc 12 though counterweight.
  • the gas intake pipe 111 of the present invention may be connected to an external gas source (not shown), and induces a high-pressure gas to enter the pressure cavity 13 when the external gas source is activated. At this point, the pressure in the pressure cavity 13 suddenly becomes greater than the pressure outside the pressure cavity 13 due to the high-pressure gas induced. That is too say, the pressure in the pressure cavity 13 is greater than the pressure outside the grinding machine body 11. As such, the pressure cavity 13 becomes a positive-pressure environment. The high-pressure gas is later continually released via the pressure release gap 14, and a flow of the gas pressure is as shown in Fig. 3 . Referring to Fig.
  • the high-pressure gas is caused to enter the pressure cavity 13, such that moisture or water seeping into the pressure cavity 13 is blown dry by the high-pressure gas when the grinding machine 10 performs wet grinding.
  • the pressure cavity 13 of the grinding machine 10 can be appropriately kept dry to prevent a part of the components of the grinding machine 10 from corrosion caused by accumulated moisture or water.
  • the grinding machine 10 is adaptable to various grinding environments (e.g., wet grinding or dry grinding), so as to reduce the frequency of post-implementation equipment maintenance and to be readily installed to a mechanical arm (not shown). Further, through the above technical solution, the transmission shaft 151 and nearby structures may be blown by the high-pressure gas during a grinding process, such that thermal exchange may be performed to prevent heat from accumulating on the transmission shaft 151 and the nearby structures.
  • various grinding environments e.g., wet grinding or dry grinding
  • the transmission shaft 151 and nearby structures may be blown by the high-pressure gas during a grinding process, such that thermal exchange may be performed to prevent heat from accumulating on the transmission shaft 151 and the nearby structures.
  • Fig. 1 Although the grinding machine 10 implemented by a pneumatic approach is illustrated in Fig. 1 as an example, it should be noted that the embodiments of the present invention are not limited to the pneumatic grinding machine 10, and may be applied to the grinding machine 10 implemented by an electric approach.
  • the grinding disc 12 of the present invention may also be implemented in a square form, as shown in Fig. 5 .
  • implementation concepts are the same and shall be omitted herein.
  • the host housing 112 includes a cavity 117 for disposing the power assembly 15, an gas intake channel 118 connected to the cavity 117 and for receiving the high-pressure gas from the external gas source, and a gas output channel 119 in communication with the cavity 117 and for discharging the high-pressure gas out of the cavity 117.
  • the gas intake channel 118 receives the high-pressure gas into the cavity 117.
  • the high-pressure gas drives the power assembly 15 to rotate, which further drives the grinding disc 12 to rotate for grinding.
  • the grinding machine body 11 includes a gas guiding pipe 16, which has its two ends respectively connected to the gas output channel 119 and the gas intake pipe 111.
  • the gas guiding pipe 16 receives the high-pressure gas discharged from the gas output channel 119, and guides the high-pressure gas into the pressure cavity 13. As such, the high-pressure gas is effectively utilized to prevent the high-pressure gas from becoming waste gas after only a one-time operation.
  • the grinding machine body 11 may further include a regulating valve 17, which is connected between the gas output channel 119 and the gas guiding pipe 16. Through the regulating valve 17, the amount of the high-pressure gas entering the pressure cavity 13 through the gas guiding pipe 16 is controlled. Further, there are numerous types of the regulating valve 17, and associated details shall be omitted herein. During an application process of the regulating valve 17, as shown in Fig. 8 , the regulating valve 17 may release a part of the high-pressure gas to reduce the amount of the high-pressure gas entering the gas guiding pipe 16. Referring to Fig. 7 to Fig. 9 , in one embodiment, the grinding machine body 11 may further include a coupling tube 18.
  • the coupling tube 18 includes a first channel 181 connected to the gas output channel 119 and the gas guiding pipe 16, and a second channel 182 branched from and remaining in communication with the first channel 181 and allowing a part of the high-pressure to be released. More specifically, an inner channel diameter of the second channel 182 affects the releasable amount of the high-pressure gas.
  • a deflation control member 183 is disposed in the second channel 182.
  • the deflation control member 183 includes a plug body 184 and a through hole 185 disposed on the plug body 184. The aperture size of the through hole 185 determines a pressure release status of the deflation control member 183.
  • the deflation control member 183 releases a larger amount of the high-pressure gas and reduces the amount of the high-pressure gas entering the gas guiding pipe 16. Conversely, when the aperture of the through hole 185 is smaller, the deflation control member 183 is incapable of discharging a large amount of the high-pressure gas, such that the amount of the high-pressure gas entering the gas guiding pipe 16 is larger than that when the aperture of the through hole 185 is larger.
  • a grinding machine 10 including a grinding machine body 11 and a grinding disc 12 connected to the grinding machine body 11.
  • the grinding machine body 11 is provided with a pressure cavity 13 at a position facing the grinding disc 12 and a gas intake pipe 111 corresponding to the pressure cavity 13.
  • a pressure release gap 14 in communication with the pressure cavity 13 is formed between the grinding machine body 11 and the grinding disc 12.
  • the gas intake pipe 111 induces a high-pressure gas into the pressure cavity 13, which receives an effect of the high-pressure gas to become a positive-pressure environment.
  • the high-pressure gas is continually released via the pressure release gap 14 to prohibit external dust from entering the pressure cavity 13.
  • the grinding machine 10 is capable of preventing dust from accumulating in the pressure cavity 13 as well as effectively preventing moisture from entering the pressure cavity 13 when the grinding machine 10 is applied for wet grinding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
EP17178101.6A 2017-06-27 2017-06-27 Schleifmaschine Active EP3421173B8 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17178101.6A EP3421173B8 (de) 2017-06-27 2017-06-27 Schleifmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17178101.6A EP3421173B8 (de) 2017-06-27 2017-06-27 Schleifmaschine

Publications (3)

Publication Number Publication Date
EP3421173A1 true EP3421173A1 (de) 2019-01-02
EP3421173B1 EP3421173B1 (de) 2022-06-08
EP3421173B8 EP3421173B8 (de) 2022-08-17

Family

ID=59227615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17178101.6A Active EP3421173B8 (de) 2017-06-27 2017-06-27 Schleifmaschine

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EP (1) EP3421173B8 (de)

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591989A (en) * 1968-02-20 1971-07-13 Bahco Ab Hand grinding machines
US6802766B2 (en) 2002-10-30 2004-10-12 Basso Industry Corp. Air-guiding structure for an air sander
CN1748939A (zh) 2004-04-16 2006-03-22 苏州宝时得电动工具有限公司 减振装置，使用该减振装置的工具及其清洁工作表面的方法
EP2147744A1 (de) * 2008-07-22 2010-01-27 Peugeot Citroën Automobiles S.A. Pressluft-Poliergerät mit Kühlung
US7722438B1 (en) 2007-08-06 2010-05-25 Honda Motor Co., Ltd. Air blow functionality for disc sander
JP2010264573A (ja) * 2009-05-18 2010-11-25 Tsuchiya Co Ltd 空冷式ポリッシャー
EP2347857A2 (de) * 2010-01-26 2011-07-27 Boris Dipl.-Ing. Kochanski Druckluft betriebene Maschine hauptsächlich zum Polieren oder Schleifen eines Werkstückes mit Kühlung desselben, erzeugt durch ungenutzte Antriebsenergie
EP2479001A1 (de) 2011-01-19 2012-07-25 Hitachi Koki Co., Ltd. Staubabsaugungsadapter und Elektrowerkzeug, das einen Staubabsaugungsadapter enthält
JP2012210691A (ja) 2011-03-31 2012-11-01 Hitachi Koki Co Ltd 集塵アダプターおよび集塵アダプターを備えた動力工具
EP2611573A1 (de) 2010-08-31 2013-07-10 Jöst GmbH Schleiftellereinheit für eine rotationsschleifmaschine
JP2014039975A (ja) 2012-08-21 2014-03-06 Hitachi Koki Co Ltd オービタルサンダ
TWI439616B (zh) 2008-08-05 2014-06-01 Yu Guang Lai 消能減震器
JP2014124752A (ja) 2012-12-27 2014-07-07 Makita Corp サンダ用シール部材及びサンダ
JP2014217920A (ja) 2013-05-08 2014-11-20 株式会社マキタ 作業工具および当該作業工具の製造方法
JP5682410B2 (ja) 2011-03-30 2015-03-11 日立工機株式会社 集塵アダプターおよび集塵アダプターを備えた動力工具
JP5696488B2 (ja) 2011-01-19 2015-04-08 日立工機株式会社 研削用集塵カバー及び動力工具
JP5760892B2 (ja) 2011-09-20 2015-08-12 日立工機株式会社 集塵アダプターおよび集塵アダプターを備えた研削機
EP3028811A1 (de) 2014-12-05 2016-06-08 Guido Valentini Stützteller für ein handgeführtes Polier- oder Schleifwerkzeug und handgeführtes Polier- oder Schleifwerkzeug mit solch einem Stützteller

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646712A (en) * 1970-08-24 1972-03-07 Pedro Quintana Dust-removing attachment device for power grinders
JPS6210046Y2 (de) * 1981-02-03 1987-03-09

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591989A (en) * 1968-02-20 1971-07-13 Bahco Ab Hand grinding machines
US6802766B2 (en) 2002-10-30 2004-10-12 Basso Industry Corp. Air-guiding structure for an air sander
CN1748939A (zh) 2004-04-16 2006-03-22 苏州宝时得电动工具有限公司 减振装置，使用该减振装置的工具及其清洁工作表面的方法
US7722438B1 (en) 2007-08-06 2010-05-25 Honda Motor Co., Ltd. Air blow functionality for disc sander
EP2147744A1 (de) * 2008-07-22 2010-01-27 Peugeot Citroën Automobiles S.A. Pressluft-Poliergerät mit Kühlung
TWI439616B (zh) 2008-08-05 2014-06-01 Yu Guang Lai 消能減震器
JP2010264573A (ja) * 2009-05-18 2010-11-25 Tsuchiya Co Ltd 空冷式ポリッシャー
EP2347857A2 (de) * 2010-01-26 2011-07-27 Boris Dipl.-Ing. Kochanski Druckluft betriebene Maschine hauptsächlich zum Polieren oder Schleifen eines Werkstückes mit Kühlung desselben, erzeugt durch ungenutzte Antriebsenergie
EP2611573A1 (de) 2010-08-31 2013-07-10 Jöst GmbH Schleiftellereinheit für eine rotationsschleifmaschine
EP2479001A1 (de) 2011-01-19 2012-07-25 Hitachi Koki Co., Ltd. Staubabsaugungsadapter und Elektrowerkzeug, das einen Staubabsaugungsadapter enthält
JP5696488B2 (ja) 2011-01-19 2015-04-08 日立工機株式会社 研削用集塵カバー及び動力工具
JP5682410B2 (ja) 2011-03-30 2015-03-11 日立工機株式会社 集塵アダプターおよび集塵アダプターを備えた動力工具
JP2012210691A (ja) 2011-03-31 2012-11-01 Hitachi Koki Co Ltd 集塵アダプターおよび集塵アダプターを備えた動力工具
JP5760892B2 (ja) 2011-09-20 2015-08-12 日立工機株式会社 集塵アダプターおよび集塵アダプターを備えた研削機
JP2014039975A (ja) 2012-08-21 2014-03-06 Hitachi Koki Co Ltd オービタルサンダ
JP2014124752A (ja) 2012-12-27 2014-07-07 Makita Corp サンダ用シール部材及びサンダ
JP2014217920A (ja) 2013-05-08 2014-11-20 株式会社マキタ 作業工具および当該作業工具の製造方法
EP3028811A1 (de) 2014-12-05 2016-06-08 Guido Valentini Stützteller für ein handgeführtes Polier- oder Schleifwerkzeug und handgeführtes Polier- oder Schleifwerkzeug mit solch einem Stützteller

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Publication number Publication date
EP3421173B1 (de) 2022-06-08
EP3421173B8 (de) 2022-08-17

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