EP0074458A2 - Poussoir à galet - Google Patents

Poussoir à galet Download PDF

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Publication number
EP0074458A2
EP0074458A2 EP82101263A EP82101263A EP0074458A2 EP 0074458 A2 EP0074458 A2 EP 0074458A2 EP 82101263 A EP82101263 A EP 82101263A EP 82101263 A EP82101263 A EP 82101263A EP 0074458 A2 EP0074458 A2 EP 0074458A2
Authority
EP
European Patent Office
Prior art keywords
roller
bearing
guide body
axis
axle
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Withdrawn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
EP82101263A
Other languages
German (de)
English (en)
Other versions
EP0074458A3 (fr
Inventor
Kurt Wizemann
Manfred Knieriem
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.)
J Wizemann & Co GmbH
Original Assignee
J Wizemann & Co 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 J Wizemann & Co GmbH filed Critical J Wizemann & Co GmbH
Publication of EP0074458A2 publication Critical patent/EP0074458A2/fr
Publication of EP0074458A3 publication Critical patent/EP0074458A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • the invention relates to a roller tappet with a guide body to which an axle is attached and which has bearing portions between the axle ends holding a recess into which a roller rotatably mounted on the axle engages.
  • Such tappets are used in the valve train of internal combustion engines, piston compressors and pumps.
  • the recesses of the guide body of known roller tappets receiving the axle ends were designed as bores, which not only had to be drilled, but also had to be ground or honed in order to avoid play on the roller axis and to precisely determine their position relative to the circumference of the guide body.
  • the production was therefore relatively complex, and in addition the known roller tappets of the type described are also relatively heavy, since they have a solid guide body.
  • the invention was based on the object of improving known roller tappets of the type mentioned in such a way that they can be produced more cheaply than hitherto.
  • roller tappet has a lower weight than a comparable known roller tappet, which meets the requirement to use components with the smallest possible mass in the valve train of internal combustion engines, in order to increase the possible maximum speed of the units.
  • the lower weight of the roller tappet according to the invention is due to the fact that the bearing parts of the guide body have a lower height than in known constructions - they no longer have to overlap the axle ends.
  • a further reduction in weight is achieved in that the guide body is formed as a deep-drawn sheet steel part, an optimal weight reduction then being achieved by making the guide body approximately pot-shaped and designing it so that it has a cavity that is open towards the roller in which the role is partially immersed.
  • a defined support of the roller axis can also be achieved, since the bearing troughs do not have to have a circular cross section, but can have a profile in the form of a prism or a so-called bishop's cap, so that the roller axis in each bearing trough in any case along two lines lies on; in comparison to the prior art, this results in a defined support of the roller axis in the bearing troughs.
  • the guide body can consist of solid material or can be designed as a hollow body; the same applies to the roller axis.
  • Figure 1 shows a solid guide body (10), in the bottom (12) of a pan (14) for the push rod of the valve control e.g. an internal combustion engine.
  • a groove (18) is provided in its peripheral surface (16) for the engagement of an anti-twist device (not shown).
  • Two bearing jaws (20) are integrally formed on the guide body 10, between which there is a transverse slot (22) and into each of which a bearing trough (24) has been incorporated at the top.
  • An axis (30) is inserted into these storage troughs sets, on which a roller (34) is rotatably mounted by means of a bearing bush (32).
  • This roller engages in the transverse slot (22) of the guide body (10), but without touching its boundaries. Since, during operation, the roller tappet lies between parts of a valve control, not shown, namely between a camshaft and an associated tappet rod or an associated lever, the forces generated by the valve springs of the unit ensure that the axis (30) is pressed into the bearing recesses (24) becomes.
  • axle (30) lying in the bearing troughs (24) it is therefore sufficient to secure the ends of the axle (30) lying in the bearing troughs (24) by caulking the material of the bearing jaws (20) in the axial direction and upwards.
  • the axis (30) can also be secured by soldering or by electron beam welding.
  • FIG. 1a shows the profile of one of the bearing troughs (24), which corresponds almost to a semicircle with radius "r" around the center (40) of the laughing axis (30), the center (40), however, by the distance " a "lies above the upper edge of the bearing jaw (20). In this way it is ensured that the axis (30) can easily be inserted into the bearing troughs (24) from above.
  • the center of the axle (40) can also lie slightly below the upper edge of the bearing jaw in order to achieve a kind of snapping of the bearing axle (30) into the bearing recesses or to facilitate caulking the bearing axle to fix it.
  • FIG. 1b shows a particularly advantageous embodiment of a bearing recess (24 '), the profile of which is created by hitting two near-quarter circles with radius "r" around points (40') and (40 "), which are opposite the center of the axis ( 40) are slightly offset to the right or left and consequently have a distance "e” from one another.
  • the centers of the circular arcs are in turn at a small distance "a” either above or below the upper edge of the bearing jaws (20) and are thus offset to the center of the axis (40) that the radii "r” overlap.
  • the particularly advantageous roller tappet according to FIG. 2 has a guide body (10 ') which is deep-drawn from sheet steel and which has an upwardly opening cavity (22'), in the upper opening (23 ') of which the roller (34) engages.
  • a window (18 ') is incorporated into the peripheral surface (16) for the purpose of preventing rotation.
  • Pan (14) and bearing recesses (24) manufacturing the deep-drawing process' len so that it is a relatively inexpensive part.
  • this embodiment brings with it great progress in terms of weight saving compared to the known roller tappets with a solid guide body.
  • the same purpose is served by two flattened portions (36) that extend vertically to the roller axis, since this results in a reduction in the wall thickness of the guide body in the regions of the guide body adjacent to the broad sides of the cavity (22 ').
  • the bearing troughs can also have a profile, as shown in FIG. 1b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP82101263A 1981-09-12 1982-02-19 Poussoir à galet Withdrawn EP0074458A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3136202 1981-09-12
DE3136202 1981-09-12

Publications (2)

Publication Number Publication Date
EP0074458A2 true EP0074458A2 (fr) 1983-03-23
EP0074458A3 EP0074458A3 (fr) 1984-04-11

Family

ID=6141472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101263A Withdrawn EP0074458A3 (fr) 1981-09-12 1982-02-19 Poussoir à galet

Country Status (1)

Country Link
EP (1) EP0074458A3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19909418A1 (de) * 1999-03-04 2000-09-07 Mahle Ventiltrieb Gmbh Rollenstößel
DE102006028348B3 (de) * 2006-06-20 2007-10-31 Siemens Ag Rollenlagerungsvorrichtung
WO2015154757A1 (fr) * 2014-04-07 2015-10-15 Schaeffler Technologies AG & Co. KG Élément de transmission de course
CN110344902A (zh) * 2013-09-27 2019-10-18 Skf公司 凸轮从动件、喷射泵和阀致动器及制造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1565223A (en) * 1919-02-10 1925-12-08 Packard Motor Car Co Hydrocarbon motor
FR2088683A5 (fr) * 1970-04-21 1972-01-07 Meca Stephanoise Const
US3822683A (en) * 1972-12-11 1974-07-09 Caterpillar Tractor Co Roller bearing retaining clip
DE2712450C2 (de) * 1977-03-22 1984-08-23 Klöckner-Humboldt-Deutz AG, 5000 Köln Pumpenkolbenantrieb für eine Kraftstoffeinspritzpumpe für Brennkraftmaschinen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19909418A1 (de) * 1999-03-04 2000-09-07 Mahle Ventiltrieb Gmbh Rollenstößel
DE102006028348B3 (de) * 2006-06-20 2007-10-31 Siemens Ag Rollenlagerungsvorrichtung
JP2009541671A (ja) * 2006-06-20 2009-11-26 コンチネンタル オートモーティヴ ゲゼルシャフト ミット ベシュレンクテル ハフツング ローラ支承装置
US8522739B2 (en) 2006-06-20 2013-09-03 Continental Automotive Gmbh Roller seating device
CN110344902A (zh) * 2013-09-27 2019-10-18 Skf公司 凸轮从动件、喷射泵和阀致动器及制造方法
CN110344902B (zh) * 2013-09-27 2021-05-11 Skf公司 凸轮从动件、喷射泵和阀致动器及制造方法
WO2015154757A1 (fr) * 2014-04-07 2015-10-15 Schaeffler Technologies AG & Co. KG Élément de transmission de course

Also Published As

Publication number Publication date
EP0074458A3 (fr) 1984-04-11

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Inventor name: KNIERIEM, MANFRED

Inventor name: WIZEMANN, KURT