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
  • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
  • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
  • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
  • F02M59/102—Mechanical drive, e.g. tappets or cams
• • 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
  • F04B1/0404—Details or component parts
  • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
• • 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
  • F04B1/0404—Details or component parts
  • F04B1/0439—Supporting or guiding means for the pistons
• • 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
  • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
  • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly

Definitions

• the invention relates to a method for producing cup-like housings for roller tappets, wherein each housing has a one-piece tailed bottom, in the outside of a diametrically continuous semi-cylindrical indentation for immediate storage of a role for a periodic Huber Weger sits, with an inside of the soil with a facility for a follower part is provided.
• the housing after the above citation are constructed comparatively complicated. Their production / shaping takes place in individual processing, for example, by extrusion or cutting with great handling effort. Thus, there are relatively high component costs.
• this object is achieved in that in a first step, a rod profile is kept ready as a semi-finished product in the length of two immediately adjacent housing, that in a further step, two substantially hollow cylindrical interiors with the facilities at Endstirnen the rod profile while maintaining an axially central Solid section are introduced therebetween, that in a subsequent step, a radially through the solid section-based bore, centered on a transverse median plane of the bar profile, manufactured and that then the bar profile is separated along the transverse center plane to obtain two housings.
• two housings for roller tappets can be produced simultaneously from a semifinished product, wherein prior to the cracking process, the interiors at the end brackets of the bar profile can optionally also be braced successively.
• a forming such as extrusions to represent the interiors may also be in question.
• a particular advantage is that after the separation of the two housings no further processing, except for an optional coating of the recesses, takes place.
• the recesses in the floor, in which the cam rollers run directly can be provided, for example, with a DLC wear protection layer after the separation.
• the housings manufactured according to the invention are provided in particular for roller tappets, such as those used in high-pressure fuel pumps, for example, for diesel engines. However, it is also conceivable and envisaged for use with valve train roller thrust.
• 2, 3 are longitudinal sections through a rod profile for the production of two housings offset from one another by 90 °;
• FIG. 4 is a plan view of FIGS. 2 and 4
• FIG. 5 is a perspective view of the bar profile.
• FIG. 1 shows a roller tappet 20 for a high-pressure fuel pump of an internal combustion engine.
• the roller tappet 20 has a cup-shaped housing 1 with an integrally connected bottom 3.
• a semi-cylindrical indentation 5 for direct storage of a roller 6 for a lifting cam.
• Lateral the roller start is limited by disc-like elements 17 which are fixed radially outward by a snap ring 18.
• An inside 7 of the bottom 3 (see Fig. 2, 3) has a one-piece tailed, dome-like attachment 8 for a pump piston within a "hollow" interior 10.
• On both sides of the indentation 5 is continuously through the bottom 3 each designed as a bore axial passage 19 for fuel, lubricant or air shown.
• This "double" Bar profile 9 is separated from a strand.
• the hollow cylindrical interior spaces 10 are turned off with the systems 8 at Endstirnen 1 1 of the bar profile 9 while maintaining an axially central solid portion 13, which takes place simultaneously, o-, with only one tool, successively.
• a radially extending bore 14 is bored through the solid section 13, centered on a transverse center plane of the bar profile 9, and then finished by fine grinding.
• the bar profile 9 is cracked along the transverse center plane, against which two chipped cracking grooves 16 lie, so that two finished casings 1 are present for completion with the roller 6.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Valve-Gear Or Valve Arrangements (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=61189190

Family Applications (1)

Country Status (4)

Citations (3)

Family Cites Families (5)

• 2017
  • 2017-02-21 DE DE102017103481.1A patent/DE102017103481B4/de active Active
• 2018
  • 2018-01-11 CN CN201880011879.6A patent/CN110312866B/zh active Active
  • 2018-01-11 EP EP18704137.1A patent/EP3586004B1/de active Active
  • 2018-01-11 WO PCT/DE2018/100015 patent/WO2018153395A1/de unknown

Patent Citations (3)

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