• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A hollow piston for a hydrostatic piston machine and especially for a swash-plate-type axial-piston pump or motor, comprises a hollow outer cylinder member which is formed at one end with a ball head and at the other end with a cover. Extending centrally through this hollow piston is a central post having its opposite ends secured to or engaging the opposite ends of the outer piston member and formed with a central bore communicating between a passage in the cover and a passage in the ball head. At least one of these ends of the central post is juxtaposed with a respective end of the piston and the juxtaposed ends are formed with a conical surface and an edge engaging this surface to seal the post to the outer member.
    公开号:SU860716A3
    申请号:SU2547948
    申请日:1977-11-23
    公开日:1981-08-30
    发明作者:Хейль Вальтер
    申请人:Линде Аг (Фирма)；
    IPC主号:
    专利说明:

    Union of Soviet
    Socialist
    Republics
    (72) Author of the invention (71) Applicant
    DESCRIPTION OF THE INVENTION
    TO THE PATENT
    0.) 860716 (61) Additional to the patent (22) Declared 2311.77 (21) 2547948 / 25-08 (51) M. Cl. 1 * 3 (23) Priority - (32) 11.26.76 F 16 J 1/00 (31) P 2653 8681 (33) Germany
    Published on August 30, 2001. Bulletin No. 32
    Date of publication of the description 30.0881 (53) UDC 621.432 (088.8)
    Alien
    Walter Hale (Germany)
    Foreign company Linde AG (Germany) “
    (54) EMPTY PISTON FOR HYDROSTATIC:
    PISTON MACHINES
    The invention relates to mechanical engineering.
    Known piston for hydraulic machines comprising a cylindrical body, wherein _ e rack mounted central axial bore, is rigidly connected to the housing ring covering the end of the housing cover and filter, wherein the filter is arranged in vi- ._ de helical groove along the axis tsent- ιυ tral racks [1] ·
    The disadvantage of this device is its structural complexity, due to the complexity of the helical grooves of the filter. fifteen
    The purpose of the invention is to simplify the design of the piston.
    This goal is achieved in that the filter is made in the form of a gap between the ring and the cap, and 20, the inner surface of the ring is made with a diameter larger than the outer diameter of the cap.
    In FIG. 1 shows a piston, a longitudinal __ section; in FIG. 2 - an embodiment of the piston.
    The piston comprises a hollow cylindrical housing 1, in which a central strut 2 is mounted with an axial hole 3 for supplying lubricant to the ball joint 4, for example, by friction welding, a ring 5 connected to the housing and closing the end face of the housing 1 cover 6, and the inner the surface of the ring 5 is made with a diameter greater than the outer diameter of the cap.
    In addition, the piston is equipped with an adapter 7.
    The assembly of the piston parts is carried out mainly by friction welding.
    During operation of the hydraulic machine, the working fluid passes through the slotted filter formed by the cover 6 and the ring 5, and flows through the central hole 3 in the rack 2 to the ball joint 4 and lubricates it.
    In the piston of FIG. 1, adapter 7 is integral with lid 6, and in FIG. 2 - with a ring 5.
    This embodiment of the filter in the piston simplifies its design, provides reliable cleaning of the working fluid supplied for lubrication.
    权利要求:
    Claims (1)
    [1]
    1. US patent 3,828,654, cl. 91-488, pub. 1972.
    类似技术:
    公开号 | 公开日 | 专利标题
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    同族专利:
    公开号 | 公开日
    JPS5368367A|1978-06-17|
    US4191095A|1980-03-04|
    RO73194A|1981-09-24|
    SU860716A1|1981-08-30|
    BR7707394A|1978-06-20|
    DE2653868A1|1978-06-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3106138A|1960-06-27|1963-10-08|Hans Toma|Piston type hydrostatic power units|
    DE1920140A1|1968-06-20|1970-09-24|Ind Karl Marx Stadt Veb|Pistons for hydrostatic pumps and motors|
    DE2237240A1|1972-07-28|1974-02-07|Linde Ag|PISTONS FOR HYDROSTATIC PISTON MACHINES|
    US3828654A|1972-08-03|1974-08-13|Fmc Corp|Piston for torque transmitting apparatus of the swash plate type|
    US3896707A|1973-08-24|1975-07-29|Caterpillar Tractor Co|Filled piston retaining means with erosion protection|
    DD110094A1|1973-12-27|1974-12-05|GB2124935B|1982-07-21|1985-08-14|Cam Gears Ltd|A piston and cylinder assembly a power assisted steering gear which includes such an assembly and a method of forming a piston for such an assembly|
    DE3609892A1|1985-03-26|1986-10-09|Linde Ag, 6200 Wiesbaden|Hollow piston for a hydrostatic piston engine and method of manufacturing it|
    US5265331A|1992-01-16|1993-11-30|Caterpillar Inc.|Method of manufacturing a piston for an axial piston fluid translating device|
    DE19620167C2|1996-05-20|1998-11-12|Brueninghaus Hydromatik Gmbh|Hollow piston with radially welded cover|
    JP2000038987A|1998-05-20|2000-02-08|Toyota Autom Loom Works Ltd|Manufacture of piston for compressor|
    KR100302852B1|1999-03-20|2001-10-29|신영주|Manufacturing method of hollow piston for compressor|
    US6575080B1|1999-09-24|2003-06-10|Kabushiki Kaisha Toyoda Jidoshokki Seisakusho|Single-headed piston for swash plate type compressor wherein head portion has a curved surface at axial end|
    US6293185B1|2000-02-28|2001-09-25|Sauer-Danfoss Inc.|Piston for a hydrostatic cylinder block|
    US6431051B1|2000-03-31|2002-08-13|Sauer-Danfoss Inc.|Closed cavity hydraulic piston and method of making the same|
    JP3978974B2|2000-04-03|2007-09-19|株式会社豊田自動織機|Piston in compressor and piston manufacturing method|
    US6274083B1|2000-06-14|2001-08-14|Sauer-Danfoss Inc.|Method of producing a hollow piston for a hydrostatic power unit|
    US6314864B1|2000-07-20|2001-11-13|Sauer-Danfoss Inc.|Closed cavity piston for hydrostatic units|
    US6588321B1|2000-11-27|2003-07-08|Sauer-Danfoss Inc.|Closed cavity piston and method of making the same|
    US6555777B1|2002-01-11|2003-04-29|Sauer-Danfoss Inc.|Method of manufacturing bimetal slippers|
    US6703577B2|2002-06-10|2004-03-09|Sauer-Danfoss Inc.|Method of making closed cavity pistons|
    US6994014B2|2004-06-29|2006-02-07|Sauer-Danfoss Inc.|Closed cavity piston for hydrostatic power units and method of manufacturing the same|
    US20080048457A1|2006-08-28|2008-02-28|Patel Bhanuprasad S|Hydraulic energy conversion system|
    DE102009056903A1|2009-12-03|2011-06-09|Danfoss A/S|Hydraulic piston machine, in particular water-hydraulic machine|
    DE102011103883A1|2011-06-10|2012-12-13|Robert Bosch Gmbh|Method for manufacturing piston for piston engine, involves arranging coaxial bore in contact with end face of hollow piston, and connecting cover with hollow piston by friction welding through relative rotation of hollow piston and cover|
    CN102865221A|2012-10-07|2013-01-09|四川省宜宾普什驱动有限责任公司|Hollow plunger|
    CN102962641A|2012-11-16|2013-03-13|无锡阳工机械制造有限公司|Elevator hydraulic oil tank piston and piston rod processing method|
    JP2014152690A|2013-02-07|2014-08-25|Kawasaki Heavy Ind Ltd|Piston|
    CH707789A1|2013-03-25|2014-09-30|Liebherr Machines Bulle Sa|Piston for an axial piston.|
    WO2014187512A1|2013-05-22|2014-11-27|Hydac Drive Center Gmbh|Axial piston pump having a swash-plate type construction|
    CN103711689A|2014-01-09|2014-04-09|北京理工大学|High pressure hydraulic pump plunger of hollow structure|
    US10634246B2|2017-09-05|2020-04-28|Vianney Rabhi|Hydraulic piston with cooling and lubrication valve|
    CN111215852B|2020-01-22|2021-08-17|武汉船用机械有限责任公司|Machining method for cylinder body of double-piston oil cylinder|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19762653868|DE2653868A1|1976-11-26|1976-11-26|HOLLOW PISTON FOR A HYDROSTATIC PISTON MACHINE AND METHOD FOR THE PRODUCTION THEREOF|
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