EP0141216B1 - Dispositif de servo-réglage pour une machine hydraulique - Google Patents

Dispositif de servo-réglage pour une machine hydraulique Download PDF

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Publication number
EP0141216B1
EP0141216B1 EP84111149A EP84111149A EP0141216B1 EP 0141216 B1 EP0141216 B1 EP 0141216B1 EP 84111149 A EP84111149 A EP 84111149A EP 84111149 A EP84111149 A EP 84111149A EP 0141216 B1 EP0141216 B1 EP 0141216B1
Authority
EP
European Patent Office
Prior art keywords
control
pressure medium
adjustment piston
hydraulic machine
piston
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.)
Expired
Application number
EP84111149A
Other languages
German (de)
English (en)
Other versions
EP0141216A1 (fr
Inventor
Klaus Dipl.-Ing. Griese
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.)
Robert Bosch GmbH
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
Priority to AT84111149T priority Critical patent/ATE27041T1/de
Publication of EP0141216A1 publication Critical patent/EP0141216A1/fr
Application granted granted Critical
Publication of EP0141216B1 publication Critical patent/EP0141216B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F04B49/123—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/06—Control
    • F04B1/07—Control by varying the relative eccentricity between two members, e.g. a cam and a drive shaft

Definitions

  • the invention relates to a servo adjustment device according to the preamble of the main claim.
  • a servo adjustment device serves to adjust the hydraulic machine to a larger or smaller delivery or swallowing quantity.
  • a control pressure medium flow is necessary, which is taken directly from the machine to be adjusted.
  • This requires a number of expenses, such as sampling valves, sealing arrangements and other things, which makes the device expensive and possibly prone to failure, especially if the medium is not suitable for the actuation of control and regulating devices due to the physical and chemical properties (FR- A-2 184 872).
  • the arrangement according to the invention with the characterizing features of the main claim has the advantage that a separate control oil flow is used for the adjusting elements of the device, which comes from any pressure medium reservoir, and the more advantageous. Way can also be operated in the low pressure range. This makes the setup more flexible and easier. It is only necessary to ensure that the control oil flow does not come into contact with the pumped medium of the machine.
  • FIG. 1 shows a partial longitudinal section through a servo adjusting device, in FIG. 2 a section along 11-11 according to FIG. 1, in FIGS. 3a and 3b details.
  • the housing 10 of the hydraulic machine is only indicated in FIGS. 1 and 2.
  • the actual adjusting device 11 is mounted on its upper side and has two housing parts 12 and 13 placed one above the other.
  • a cam ring 14 is arranged, which is used for the stroke generation of pistons, not shown. It can be adjusted with the aid of the adjusting device 11 for the purpose of changing the stroke.
  • the actuating piston 15 is counteracted by a piston, not shown, which is always acted upon by pressure medium and which rests on the cam ring 14 at a point diametrically opposite the actuating piston 15.
  • the cup-shaped control piston 15 slides with its inside on a guide sleeve 18 which is fixedly arranged in a through bore 19 of the housing part 12.
  • the bore 19 widens in its lower part to form a cylindrical recess 21 which forms a space 22 which is connected via channels 23 to the interior of the housing 10 and thus to the hydraulic machine.
  • a bellows 25 is arranged tightly between the shoulder 24 formed by the bore 19 and the recess 21 and the upper edge of the actuating piston 15. He is in the upper part of the actuating piston 15 on the outer wall z.
  • two bores 29, 30 offset from one another by 90 ° are formed in the housing part 12, of which the bore 30 represents a blind bore.
  • a channel 31 runs from the latter to an annular groove 32 in the housing part 11.
  • the bore 29 leads via a bore part 33 with a reduced diameter to a longitudinal groove 34 which is formed in the bore 19 and has a connection to the interior of the bellows 25.
  • a channel 35 leads to a continuous longitudinal bore 37 in the upper housing part 11. This is closed by a screw plug 38, which has a central through bore 39 in which an axially adjustable stop pin 40 is tightly arranged.
  • a control sleeve 42 is slidably arranged in the longitudinal bore 37 and has an external spur toothing 43, in which a pinion 44 engages, with which the control sleeve 42 can be displaced in the axial direction.
  • the control sleeve In the region of the toothing 43, the control sleeve also has an elongated annular groove 45 of shallow depth. Channel 35 opens there.
  • a continuous longitudinal bore 46 is formed in the control sleeve 42, in which a control slide 47 is guided in a tightly sliding manner. It lies with its lower end against a spacer pin 49, which is supported on the bottom of the actuating piston 15.
  • the compression spring 50 therefore endeavors to press the guide sleeve 18 and thus the control slide 47 upward in the direction of the locking screw 38.
  • the control slide 47 has an annular groove 55 near its upper end, and here there are two narrow collars 53, 54. In the area of the annular groove 55, a transverse bore 56 opens through the wall of the control sleeve 42 and also connects to the annular groove 45 on the outer circumference of the Has control sleeve.
  • the control slide 47 also has an annular groove 58 below the collar 54, on which a transverse bore 59, which also penetrates the wall of the control sleeve 42, also opens Has connection with the annular groove 32.
  • the collar 60 below the annular groove 58 on the control slide serves as a guide in the control sleeve 42.
  • a pressure spring 63 acts on the lower edge 62 of the control sleeve and tends to move the control sleeve in the direction of its upper end position.
  • a through bore 66 is formed parallel to its longitudinal bore 46, from which a transverse bore 67 extends, which opens out between the collars 53 and 54 when the control slide 47 is in the neutral position.
  • a pressure medium source 68 is connected to the blind bore 30 and a container 69 to the bore 29.
  • the pinion 44 is rotated. As a result, the control sleeve 42 moves relative to the control slide 47. If the control sleeve is moved downward, the collar 54 makes a connection from the annular groove 32 to the longitudinal bore 66, so that the pressure medium conveyed by the pump 68 into the interior of the control device, in particular the Guide sleeve 18 can penetrate and acts on the actuating piston 15. This now adjusts the cam ring to a smaller flow rate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Servomotors (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Electric Motors In General (AREA)

Claims (2)

1. Dispositif de servo-réglage pour une machine hydraulique comportant un élément de commande (42) qui peut coulisser à volonté sous l'action d'un dispositif de manoeuvre et qui commande un flux de commande de fluide sous pression pour un dispositif qui manoeuvre l'élément de réglage (14) de la machine hydraulique et qui présente au moins un piston de réglage (15) conçu partiellement creux ; et comportant un coulisseau de commande (47) qui, avec l'élément de commande (42), commande un espace sous pression contre le piston de réglage, caractérisé en ce que le piston de réglage (15) est guidé par sa face intérieure, contre un corps de guidage (18), et en ce que le flux de commande du fluide sous pression est séparé, au moyen d'un soufflet (25) fixé au piston de réglage et à une paroi du carter voisine (24), d'avec le fluide sous pression contenu dans le carter de la machine hydraulique.
2. Dispositif selon la revendication 1. caractérisé en ce que l'extrémité, opposée au piston de réglage (15), du soufflet, est poussée contre la paroi du carter (24) au moyen d'un ressort de compression.
EP84111149A 1983-10-06 1984-09-19 Dispositif de servo-réglage pour une machine hydraulique Expired EP0141216B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111149T ATE27041T1 (de) 1983-10-06 1984-09-19 Servoverstelleinrichtung fuer eine hydromaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19838328832U DE8328832U1 (de) 1983-10-06 1983-10-06 Servoverstelleinrichtung fuer eine hydromaschine
DE8328832U 1983-10-06

Publications (2)

Publication Number Publication Date
EP0141216A1 EP0141216A1 (fr) 1985-05-15
EP0141216B1 true EP0141216B1 (fr) 1987-05-06

Family

ID=6757753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111149A Expired EP0141216B1 (fr) 1983-10-06 1984-09-19 Dispositif de servo-réglage pour une machine hydraulique

Country Status (4)

Country Link
EP (1) EP0141216B1 (fr)
JP (1) JPS6063078U (fr)
AT (1) ATE27041T1 (fr)
DE (2) DE8328832U1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2573863A (en) * 1948-05-19 1951-11-06 Alva E Mitchell Compressor
DE2223964C3 (de) * 1972-05-17 1978-03-16 Robert Bosch Gmbh, 7000 Stuttgart Servoverstelleinrichtung
DE2337481C2 (de) * 1973-07-24 1982-05-13 Robert Bosch Gmbh, 7000 Stuttgart Folgesteuereinrichtung für eine verstellbare Pumpe
JPS5517234B2 (fr) * 1973-09-20 1980-05-09

Also Published As

Publication number Publication date
EP0141216A1 (fr) 1985-05-15
JPS6063078U (ja) 1985-05-02
DE8328832U1 (de) 1985-03-14
ATE27041T1 (de) 1987-05-15
DE3463554D1 (en) 1987-06-11

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