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WO1999039127A1 - Lubrification sous pression et fermee et systeme d'huile hydraulique - Google Patents

Lubrification sous pression et fermee et systeme d'huile hydraulique Download PDF

Info

Publication number
WO1999039127A1
WO1999039127A1 PCT/SE1998/001300 SE9801300W WO9939127A1 WO 1999039127 A1 WO1999039127 A1 WO 1999039127A1 SE 9801300 W SE9801300 W SE 9801300W WO 9939127 A1 WO9939127 A1 WO 9939127A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
grease
lubrication
bearing pin
cylinder apparatus
Prior art date
Application number
PCT/SE1998/001300
Other languages
English (en)
Inventor
Tore Wiklund
Original Assignee
Tore Wiklund
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
Priority claimed from SE9800234A external-priority patent/SE512726C2/sv
Application filed by Tore Wiklund filed Critical Tore Wiklund
Priority to EP98931192A priority Critical patent/EP1049898A1/fr
Priority to AU81374/98A priority patent/AU8137498A/en
Publication of WO1999039127A1 publication Critical patent/WO1999039127A1/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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/102—Construction relative to lubrication with grease as lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0614—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part of the joint being open on two sides
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/02—Sliding-contact bearings
    • F16C23/04—Sliding-contact bearings self-adjusting
    • F16C23/043—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings
    • F16C23/045—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings for radial load mainly, e.g. radial spherical plain bearings

Definitions

  • the present patent application relates to a grease lubrication system combined with a system for transportation of hydraulic oil, and the invention is more particularly directed to such a lubrication and hydraulic oil system, which is formed as a closed and pressurized system which is fully sealed and eliminates the risk of spill of grease and hydraulic oil.
  • the invention has been developed especially in connection to hydraulic arms of the type which are rotated or are both swinged/turned and rotated about a bearing pin or a bearing ball, actuated by a piston-cylinder apparatus which at the bearing pin or bearing ball thereof is fixed in relation to a stationary bearing block.
  • the invention has been especially developed in connection to improvements of the type of hoseless hydraulic piston-cylinder apparatus, generally referred to as hydraulic cylinders or hydraulic arms which are shown for instance in the patent publication WO 83/0281 4 (in the name of the present applicant).
  • the invention is especially useful in connection to said type of hoseless hydraulic cylinders, and in the following it will be described with reference to axial motors of piston-cylinder type, especially hydraulic cylinders which are rotatable in one plane of a slide bearing or which are universally rotatable over a ball bearing.
  • the lubrication place is evacuated so that grease can be forced through the entire lubrication system, and whereby also in this case a certain amount of grease is generally pressed out at the end of the lubrication system and is left at the road or in the nature.
  • the said patent solves the problem of providing a grease lubrication system which is formed so that there is normally no spill of grease into the nature, so that there is an optimum little consumption of grease at the lubrication places, so that the grease lubrication follows automatically and with a constant grease lubrication, so that the grease is pressed into the lubrication places with a constant pressure, so that the grease lubrication is made with long time action, and so that the machine or the vehicle must not be stopped recurrently for filling of grease.
  • the object of the invention is to solve the problems involved in both two-dimensionally and universally movable arms actuated by hydraulic cylinders, both as concerns spill of lubrication grease, and also as concerns leaking, cracked or torn apart hydraulic hoses.
  • the bearing pin for the bearing ball of the two-dimensionally or the universally movable arm is formed both with a pressurized, closed system for continuous lubrication of the bearing places between the bearing ball and the bearing sockets, and with means for pressurized, closed supply of hydraulic fluid to the two sides of the piston of the hydraulic piston-cylinder apparatus, without the need of using flexible hoses.
  • the supply of hydraulic fluid to the bearing pin is made by means of solid tubes, and the transportation of hydraulic fluid from said bearing pin to the piston rod side of the extendible piston is likewise made by means of solid tubes which are directly connected to a projecting part of the bearing pin.
  • connection part between the bearing pin and the hydraulic tube extending between the two ends of the hydraulic cylinder can be formed with ball joints, through which hydraulic oil can flow in both directions.
  • figure 1 shows a hydraulic piston-cylinder apparatus of hoseless type in a partly cut open condition, which apparatus is formed with a closed, pressurized grease lubrication system and with hoseless means for supply of hydraulic fluid to the two ends of the hydraulic cylinder.
  • Figure 2 is a diagrammatic side view of the apparatus of figure 1 , and figure 3 shows the opposite side of the hydraulic arm according to figure 2.
  • Figure 4 is an enlarged view of the grease lubrication system according to the invention in a hydraulic arm having a ball joint for transmitting universal motion moments.
  • Figure 5 shows a hydraulic arm having a slide bearing for transmitting rotary movements in one plane, and figure 6 shows, more in detail, the means for supply of lubrication grease and hydraulic fluid through the bearing pin to the movable hydraulic cylinder.
  • the hydraulic arm shown in the drawings comprises a cylinder part 1 , in which a piston 2 is displaceable.
  • the cylinder 1 has a lower cylinder socket 3 and an upper cylinder socket 4.
  • the lower cylinder socket 3 is formed with a cylinder ear 5 having a connection means for a bearing pin 6, which is mounted in a bearing block 7 which can be stationary in relation to the machine arm.
  • the bearing is a ball type bearing having a bearing ball 8, which is mounted in two annular ball bearing sockets 9 which are clamped to the cylinder ear 5.
  • the hydraulic arm is special in that it is hoseless, and in that the hydraulic fluid is transmitted through the bearing pin 6 to and from both the piston side 10 and the piston rod side 1 1 .
  • the bearing pin has a first axial bore 12 extending from an outer pressure medium connection 13 halfway through the bearing ball 6.
  • the bearing ball 6 has an all around extending slot 14, into which pressure medium is distributed through one or more radial bores 1 5 extending from the axial bore 12, and from there pressure medium is transmitted through a passageway 1 6 into the piston side 10 of the cylinder.
  • a lubrication system of the above described ball joint type, which is essential to the invention is shown most clearly in figures 4 and 6, and a corresponding lubrication system having a slide bearing is most clearly shown in figure 5.
  • the cylinder ear 5 is formed with two press nipples 24 (see figure 2), or one press nipple 24 and an evacuation plug. Said two connections are intended to make it possible to check that the entire grease lubrication system is filled up with lubrication grease.
  • the grease is pressed out, with practically constant pressure, to the lubrication surfaces between the bearing ball 8 and the bearing sockets 9.
  • the apparatus shown in figure 5 differs from the above mentioned ball joint embodiment mainly only in that figure 5 relates to a slide bearing embodiment, in which the lubrication should be made between the slide surfaces between the bearing pin 6 and the bearing sockets 9. Otherwise the two embodiments are structurally analogous.
  • FIG 6 there is shown an alternative embodiment in which the hydraulic fluid from the piston rod side 1 1 is utilized as a source of pressure for the piston 28 in the pressure chamber 27.
  • a branch conduit 31 connected at a place of the feeding side for the bearing pin 6, and in that said branch conduit 31 , over passageways 32, open in the cavity for the piston rod 30 through a specially designed pressure nipple 33.
  • the pressure acts against the side of the piston formed eith the piston rod 30.
  • the apparatus shown in figure 5 is suited for such fields of use in which the hydraulic arm can only rotate in a predetermined plane. In many cases the hydraulic arm can rotate/turn both sideways and in a predetermined plane of operation, whereby the joint place must be capable of receiving universal movements. In such cases the ball joint embodiment shown in figures 1 , 4 and 6 is best suited.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Actuator (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

L'invention concerne une lubrification sous pression fermée et hoseless et un système d'huile hydraulique destiné à un appareil piston/cylindre hydraulique (1, 2) dans lequel une partie cylindre (1) dont une extrémité (3, 5) est montée pivotante dans un bloc palier stationnaire (7), et dasn lequel l'huile hydraulique est transportée entre le côté piston (10) de l'appareil piston/cylindre et son côté tige de piston (11) dans des tubes télescopiques (21) et dasn lequel à la fois le système de lubrification sous pression (24-30) destiné à la lubrification de paliers entre l'appareil piston-cylindre (1, 2) et le bloc palier stationnaire (7), et des moyens (12-18) destinés à la délivrance d'un fluide hydraulique sous pression aux deux côtés de l'appareil piston-cylindre sont placés dans une broche de palier (6) autour de laquelle l'appareil piston-cylindre est conçu pour tourner.
PCT/SE1998/001300 1998-01-28 1998-07-01 Lubrification sous pression et fermee et systeme d'huile hydraulique WO1999039127A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP98931192A EP1049898A1 (fr) 1998-01-28 1998-07-01 Lubrification sous pression et fermee et systeme d'huile hydraulique
AU81374/98A AU8137498A (en) 1998-01-28 1998-07-01 Pressurized, closed lubrication and hydraulic oil system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9800234A SE512726C2 (sv) 1997-02-10 1998-01-28 Kolv- cylinderanordning med ett slutet, trycksatt hydraulolje-och smörjsystem
SE9800234-8 1998-01-28

Publications (1)

Publication Number Publication Date
WO1999039127A1 true WO1999039127A1 (fr) 1999-08-05

Family

ID=20410004

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/001300 WO1999039127A1 (fr) 1998-01-28 1998-07-01 Lubrification sous pression et fermee et systeme d'huile hydraulique

Country Status (3)

Country Link
EP (1) EP1049898A1 (fr)
AU (1) AU8137498A (fr)
WO (1) WO1999039127A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1148253A3 (fr) * 2000-03-23 2003-04-02 Hoerbiger Hydraulik GmbH Dispositif d'actionnement de pièces mobiles de véhicules automobiles
WO2004036058A1 (fr) * 2002-10-16 2004-04-29 Clark Equipment Company Axe de pivotement d'un cylindre hydraulique
EP1596012A3 (fr) * 2004-05-11 2007-01-10 Deere & Company Ensemble actionné par fluide sous pression

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2293167A (en) * 1939-11-03 1942-08-18 Glenn L Martin Co Hydraulic cylinder
GB1185718A (en) * 1966-06-21 1970-03-25 Roy Wheeler Young Self-Aligning Bearings with improved Lubricant Arrangements
US3678810A (en) * 1970-06-04 1972-07-25 Ltv Electrosystems Inc Rotational coupling
WO1992003684A1 (fr) * 1990-08-11 1992-03-05 Anthony Kassell Appareil de lubrification

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2293167A (en) * 1939-11-03 1942-08-18 Glenn L Martin Co Hydraulic cylinder
GB1185718A (en) * 1966-06-21 1970-03-25 Roy Wheeler Young Self-Aligning Bearings with improved Lubricant Arrangements
US3678810A (en) * 1970-06-04 1972-07-25 Ltv Electrosystems Inc Rotational coupling
WO1992003684A1 (fr) * 1990-08-11 1992-03-05 Anthony Kassell Appareil de lubrification

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1148253A3 (fr) * 2000-03-23 2003-04-02 Hoerbiger Hydraulik GmbH Dispositif d'actionnement de pièces mobiles de véhicules automobiles
WO2004036058A1 (fr) * 2002-10-16 2004-04-29 Clark Equipment Company Axe de pivotement d'un cylindre hydraulique
US6805038B2 (en) 2002-10-16 2004-10-19 Clark Equipment Company Hydraulic cylinder pivot pin
EP1596012A3 (fr) * 2004-05-11 2007-01-10 Deere & Company Ensemble actionné par fluide sous pression
US7275475B2 (en) 2004-05-11 2007-10-02 Deere & Company Apparatus driven by a pressurized medium

Also Published As

Publication number Publication date
EP1049898A1 (fr) 2000-11-08
AU8137498A (en) 1999-08-16

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