DE1074350B - Spur cam gears, in particular for fuel injection pumps - Google Patents
Spur cam gears, in particular for fuel injection pumpsInfo
- Publication number
- DE1074350B DE1074350B DENDAT1074350D DE1074350DA DE1074350B DE 1074350 B DE1074350 B DE 1074350B DE NDAT1074350 D DENDAT1074350 D DE NDAT1074350D DE 1074350D A DE1074350D A DE 1074350DA DE 1074350 B DE1074350 B DE 1074350B
- Authority
- DE
- Germany
- Prior art keywords
- cam
- fuel injection
- injection pumps
- cam track
- spur
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
- F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
- F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
- F02M41/121—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor with piston arranged axially to driving shaft
-
- 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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/08—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion
- F16H25/12—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion with reciprocation along the axis of rotation, e.g. gearings with helical grooves and automatic reversal or cams
- F16H25/125—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion with reciprocation along the axis of rotation, e.g. gearings with helical grooves and automatic reversal or cams having the cam on an end surface of the rotating element
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18296—Cam and slide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2101—Cams
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Description
DEUTSCHESGERMAN
Die Erfindung bezieht sich auf ein Stirnnockengetriebe, insbesondere zur Verwendung in Kraftstoffeinspritzpumpen für Brennkraftmaschinenj dessen Nockenbahn mit einer zylindrischen Gegenfläche in kraftschlüssiger Verbindung steht.The invention relates to a spur cam gear, in particular for use in fuel injection pumps for internal combustion engines whose cam track with a cylindrical counter surface in positive connection is.
Bei derartigen Getrieben ist die Nockenbahn am Scheitel meist stark gekrümmt, weist also einen kleinen Krümmungsradius auf. Daraus ergibt sich auf dem der Achse zugekehrten Teil der Nockenbahn eine Verschneidung der auf und ab steigenden Teile der Nockenbahn, die zu einer scharfen Kante führt. Während des Betriebes tritt an dieser Kante und auch schon kurz vor dem Übergang des aufsteigenden Teiles der Nockenbahn in die scharfe Kante wegen des kleinen Krümmungsradius an dieser Stelle eine große spezifische Druckbeanspruchung (Hertzsche Pressung) auf, welche zur Zerstörung der Nockenbahn an der genannten Stelle führen kann.In such gears, the cam track is usually strongly curved at the apex, so it has a small one Radius of curvature. This results in a on the part of the cam track facing the axis Intersection of the ascending and descending parts of the cam track, which leads to a sharp edge. While of the enterprise occurs at this edge and also shortly before the transition of the ascending part the cam track into the sharp edge because of the small radius of curvature at this point a large one specific compressive stress (Hertzian pressure), which leads to the destruction of the cam track on the mentioned body can lead.
Der Erfindung liegt die Aufgabe zugrunde, die Zerstörung der Nockenbahn durch zu große Hertzsche Pressung zu vermeiden. Sie löst diese Aufgabe dadurch, daß am Scheitel der Nockenbahn in an sich bekannter Weise die Stellen ·—■ beispielsweise durch Abschleifen — entfernt sind, an denen die spezifische Druckbeanspruchung (Hertzsche Pressung) einen für den Werkstoff des Nockens zulässigen Wert überschreiten würde.The invention is based on the object of preventing the cam track from being destroyed by too large Hertzian Avoid pressing. It solves this problem in that at the apex of the cam track in itself known Way the places · - ■ for example by grinding - are removed where the specific Compressive stress (Hertzian pressure) exceed a value permissible for the material of the cam would.
In der Zeichnung ist ein Stirnnockengetriebe, wie es beispielsweise bei Kraftstoffeinspritzpumpen Verwendung findet, schematisch dargestellt.The drawing shows a spur cam gear, as is used, for example, in fuel injection pumps finds, shown schematically.
Fig. 1 zeigt eine Längsansicht des Getriebes,Fig. 1 shows a longitudinal view of the transmission,
Fig. 2 eine Draufsicht in Richtung des Pfeiles II in Fig. 1.FIG. 2 shows a plan view in the direction of arrow II in FIG. 1.
In einem nur andeutungsweise dargestellten Gehäuse 1 eines Stirnnockengetriebes sind zylindrische Rollen 2 und eine Welle 3 gelagert, auf deren Ende eine Stirnnockenscheibe 4 sitzt. Diese wird durch eine Feder 5 gegen die Rollen 2 gedrückt, so daß die Nockenbahn 6 der Scheibe 4 mit ihren vier Nockenerhebungen 7 in kraftschlüssiger Verbindung mit den Zylinderflächen der Rollen 2 steht. Bei jeder Umdrehung der Welle 3 und damit der Nockenscheibe 4 führen daher diese beiden Teile vier axiale Hin- und Herbewegungen aus. Diese Bewegungen werden bei Verwendung des Stirnnockengetriebes für eine Kraftstoffeinspritzpumpe zum Antrieb des Pumpenkolbens benutzt.In a housing 1 of a spur cam gear, which is only indicated by way of illustration, cylindrical Rollers 2 and a shaft 3 are supported, on the end of which a face cam disk 4 is seated. This is supported by a Spring 5 pressed against the rollers 2, so that the cam track 6 of the disc 4 with its four cam lobes 7 is in frictional connection with the cylinder surfaces of the rollers 2. With every revolution the shaft 3 and thus the cam disk 4 therefore lead these two parts four axial back and forth Floats off. These movements are made when using the spur cam gear for a fuel injection pump used to drive the pump piston.
Wie in Fig. 1 und 2 gestrichelt dargestellt ist, ergeben die auf- und absteigenden Teile der Nockenbahn
am Scheitel jedes Nockens eine scharfe Kante. An Stirnnockengetriebe,
insbesondere für Kraftstoff einspritzpumpenAs shown in phantom in Figures 1 and 2, the ascending and descending portions of the cam track provide a sharp edge at the apex of each cam. On spur cam gear,
especially for fuel injection pumps
Anmelder:Applicant:
Robert Bosch G. m. b. H.r
Stuttgart-W, Breitscheidstr. 4Robert Bosch G. mb H. r
Stuttgart-W, Breitscheidstr. 4th
Dipl.-Ing. Dr.-Ing. Wilhelm Vogel,Dipl.-Ing. Dr.-Ing. Wilhelm Vogel,
Stuttgart-Bad Cannstatt,
ist als Erfinder genannt wordenStuttgart-Bad Cannstatt,
has been named as the inventor
dieser scharfen Kante und auch an dem aufsteigenden Teil der Nockenbahn kurz vor dieser scharfen Kante würde die Hertzsche Pressung zu groß werden. Deshalb ist diese Stelle der Nockenbahn am Scheitel jedes der vier Nocken durch Abschleifen entfernt. Dadurch werden Stellen der Nockenbahn mit unzulässig hoher Hertzscher Pressung vermieden. Die gesamte Breite der Nockenbahn bleibt jedoch an den Stellen der Nockenbahn erhalten, an denen z. B. bei Verwendung in Kraftstoffeinspritzpumpen die größten Kolbendrücke auftreten, nämlich im Bereich des wirksamen Kolbendruckhubes. Dieser erstreckt sich bei Kraftstoffeinspritzpumpen in der Regel nicht bis zum inneren Totpunkt des Kolbendruckhubes.this sharp edge and also on the ascending part of the cam track just before this sharp edge the Hertzian pressure would become too great. Therefore this point of the cam track is at the apex of each of the four cams removed by grinding. As a result, points on the cam track become impermissibly high Hertzian pressure avoided. However, the entire width of the cam track remains at the points of Get cam track where z. B. the largest piston pressures when used in fuel injection pumps occur, namely in the area of the effective piston pressure stroke. This extends to fuel injection pumps usually not up to the inner dead center of the piston pressure stroke.
Claims (1)
M. ten Bosch : »Berechnung der Maschinenelemente«, Springer Verlag, 1953, S.12S bis 128, »Die allgemeinen Gleichungen von Hertz«.Considered publications:
M. ten Bosch: "Calculation of the machine elements", Springer Verlag, 1953, pp.12S to 128, "The general equations of Hertz".
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3058369X | 1958-11-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1074350B true DE1074350B (en) | 1960-01-28 |
Family
ID=8085491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT1074350D Pending DE1074350B (en) | 1958-11-24 | Spur cam gears, in particular for fuel injection pumps |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3058369A (en) |
| DE (1) | DE1074350B (en) |
| FR (1) | FR1241504A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3104358A1 (en) * | 1981-02-07 | 1982-08-19 | Spica S.p.A., Livorno | Single piston injection pump for the injection of fuel into an internal combustion engine |
| DE102023134598B3 (en) | 2023-12-11 | 2025-01-02 | Ssi Schäfer Automation Gmbh (At) | Motorized roller deflection conveyor in cassette design |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3164024A (en) * | 1960-10-21 | 1965-01-05 | Wallace & Tiernan Inc | Drive mechanism and diaphragm pump employing same |
| US3343424A (en) * | 1965-05-07 | 1967-09-26 | Honeywell Inc | Timing device |
| US3893874A (en) * | 1973-01-29 | 1975-07-08 | Nutron Corp | Cams |
| US3848481A (en) * | 1973-01-29 | 1974-11-19 | Nutron Corp | Cams |
| US20060225532A1 (en) * | 2005-03-30 | 2006-10-12 | Mijy-Land Industrial Co., Ltd. | Cam mechanism for low vibration air-driven screwdriver |
| JP5956920B2 (en) * | 2012-12-14 | 2016-07-27 | 株式会社コガネイ | Liquid supply device |
| WO2020075735A1 (en) | 2018-10-12 | 2020-04-16 | 学校法人 関西大学 | Puncture needle, puncture device, and blood sampling device |
| JP7448907B2 (en) * | 2018-10-12 | 2024-03-13 | 学校法人 関西大学 | Drive mechanism and drilling device |
| US11703039B2 (en) * | 2020-08-07 | 2023-07-18 | Ridge Tool Company | Wobble plate pump drive with gear box |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US205868A (en) * | 1878-07-09 | Improvement in rotary steam-engines | ||
| US340156A (en) * | 1886-04-20 | richards | ||
| US2347364A (en) * | 1942-02-16 | 1944-04-25 | Palumbo Vincent | Cam member for engines or the like |
| US2643552A (en) * | 1947-07-23 | 1953-06-30 | Freeman H Owens | Control cam and apparatus for positioning the same |
| US2517142A (en) * | 1948-04-22 | 1950-08-01 | Joseph H Staley | Variable contour cam |
| US2750718A (en) * | 1953-12-14 | 1956-06-19 | Gear Grinding Mach Co | Method and apparatus for grinding inner side faces of channel members |
| US2893180A (en) * | 1956-12-12 | 1959-07-07 | Harry B Barrett | Methods and means for grinding automotive brake shoes |
-
0
- DE DENDAT1074350D patent/DE1074350B/en active Pending
-
1959
- 1959-11-17 US US853518A patent/US3058369A/en not_active Expired - Lifetime
- 1959-11-24 FR FR811139A patent/FR1241504A/en not_active Expired
Non-Patent Citations (1)
| Title |
|---|
| None * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3104358A1 (en) * | 1981-02-07 | 1982-08-19 | Spica S.p.A., Livorno | Single piston injection pump for the injection of fuel into an internal combustion engine |
| DE102023134598B3 (en) | 2023-12-11 | 2025-01-02 | Ssi Schäfer Automation Gmbh (At) | Motorized roller deflection conveyor in cassette design |
Also Published As
| Publication number | Publication date |
|---|---|
| US3058369A (en) | 1962-10-16 |
| FR1241504A (en) | 1960-09-16 |
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