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
  • F01L1/18—Rocking arms or levers
  • F01L1/181—Centre pivot rocking arms
• • 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
  • F01L1/18—Rocking arms or levers
  • F01L1/181—Centre pivot rocking arms
  • F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
• • 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
  • F01L1/18—Rocking arms or levers
  • F01L1/181—Centre pivot rocking arms
  • F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
  • F01L1/183—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft of the boat type

Definitions

• the invention relates to a rocker arm for actuating a gas exchange valve of an internal combustion engine
• rocker arms are arranged in internal combustion engines within a valve train as transmission elements between the cam and the gas exchange valves to be actuated.
• Each rocker arm consists of a base body having at one end at one end a Abgriffs constitutional for a cam and at another end a contact surface for a valve stem end of a gas exchange valve.
• the contact surface can be formed directly on the rocker arm or, for example, indirectly by a screw.
• In a middle-immediate section of the main body is pivotally fixed on a stationary center of rotation.
• two mutually aligned bores in the side walls for pivotally receiving the rocker arm are usually provided on a pivot axis.
• Such rocker arms require a journal bearing to guide the rocker shaft.
• a rocker arm which has an elongate base body with two side walls connected by a transverse bar. Furthermore, the main body of the rocker arm is cranked. In the middle section of the base body, the side walls on the aforementioned aligned holes, which serve to receive the rocker arm on an axis or a center of rotation. Summary of the invention
• Object of the present invention is to provide a rocker arm, which is inexpensive and easy to manufacture, according to the invention this object is achieved by a rocker arm for actuating at least one gas exchange valve of an internal combustion engine, with an elongate body having two connected by a cross bar side walls, wherein a the first end portion of the base body has a contact surface for a cam and a second end portion of the base body a contact surface for a valve stem end of the gas exchange valve, wherein the side walls in a middle-near section holes for pivotally mounting on a rocker shaft, said base body an inverted U-like Profile has and wherein the crossbar in the middle section has a roof-like elevation and the crossbeam in the mid-mid-section of its longitudinal center has at least one Oi personally trecsö réelle and in the holes bef pod is estigt is » over which the rocker arm is fastened directly on the rocker shaft.
• the inverted U-shaped profile is opened in the gas exchange valve direction.
• the crossbeam in the mid-section has a survey, which may be roof-like or triangular-like design It is also any other shape of a survey conceivable.
• the two end portions are formed such that the side walls in these areas have a lower height than in the middle near section.
• the oil passage opening is provided in the crossbar, ie the crossbar is interrupted in sections.
• the oil passage opening can extend in the region of the mid-section almost over a width of the crossbeam.
• the oil passage opening may be formed, for example, circular, diamond-shaped or rectangular.
• a sleeve is provided in the bores of the side walls.
• the sleeve extends continuously between the two side walls.
• the sleeve may be tubular and protrude beyond the side walls by a certain amount.
• end faces of the sleeve can be opened.
• a lateral surface of the sleeve has a perforation directed towards the respective oil passage opening.
• the perforation serves as well as the oil passage of the oil supply.
• the perforation of the sleeve points in the direction of the oil passage opening " to cooperate with this so that the oil can get in the direction of the axle bearing.
• the size and shape of the perforation are adapted to the size of the sleeve and the size of the oil passage opening.
• the sleeve via a welding, pressing. Lot or Stemmitati connected with the side winches.
• Lot or Stemmitati connected with the side winches are any positive, non-positive or cohesive connections conceivable.
• the connection between the sleeve and side winches can be fixed or detachable.
• the contact surface for a cam is formed by means of a cam roller.
• the cam roller can be supported by means of a bearing pin.
• the side walls may have holes in the area of the first end section. It is also possible to design the contact surface for the cam as a glacier surface. form.
• the sliding surface may for example be formed integrally with the base body.
• the crossbar extends in its second end portion plane and has a downwardly directed, integrally connected dome-like approach. Furthermore, the crossbar has in its second end portion on a through opening in the neck for a valve clearance adjusting screw.
• the opening may for example be designed as a bore with or, without thread.
• the valve clearance adjustment screw may form the contact surface for a valve stem end of the gas exchange valve.
• the base body is produced from a sheet metal material by means of stamping bending technology.
• stamping bending technology there are also other materials, such as. Sintered material, casting material and the like. Possible.
• the reverse U-like profile can be inexpensively manufactured by bending from a sheet metal blank
• Fig. 2 is a bottom view of the rocker arm according to the invention.
• Fig. 3 is a plan view of the rocker arm according to the invention
• Figures 1 to 3 each show a rocker arm 1 according to the invention in different views
• the rocker arm 1 has an elongated Grundköfper 2 on. of the two side walls 4. 5 connected by a transverse bar 3 has.
• the crossbar 3 and the side walls 4, 5 form in cross section an inverted U-like profile.
• the main body 2 made of a sheet material is divided into a first end section 6, a middle section 7 and a second end section 8.
• the main body 2 has a cranked profile. In the region of the first end section 6, the distance between the side walls 4, 5 is less than in the other course.
• the side wall 5 is in the middle section 7 in a bulged portion 9 over.
• the side wall 4 extends in the region of the first end portion 6 and the central portion 7 almost straight. In the region of the second end portion 8, the side winds 4, 5 are curved and parallel to each other.
• the first end section 6 has a contact surface 10 for a cam (not shown). As shown in FIGS. 1 to 3, the contact surface 10 is formed by means of a cam roller 11. The cam roller 1 1 is held on a bearing pin 13 via a rolling bearing 12. To support the position bolt 13 holes are provided in the side walls 4, 5.
• the second end portion 8 has a contact surface 14 for a not shown valve stem end of a gas exchange valve. The contact surface 14 is formed by a screw, not shown. To receive the screw a threaded hole 15 is present. In the region of the second end section 8 of the crossbar 3 is flat and has a dome-like approach 16 in Gas monventilraum.
• the transverse bar 3 has a roof-like elevation 17.
• the height of the side walls 4, 5 is greater than the height of the side walls 4, 5 in the region of the first and second end sections 6, 8.
• the crossbar 3 has an oil passage opening 18 in the section of its longitudinal center 7a.
• the ⁇ i telltrittsö réelle 18 is diamond-shaped and extends almost almost over the entire width of the crossbar 3, in the middle section 7, the side walls 4, 5 each have a bore 19, which serve for pivoting lent storage on a rocker arm axis, not shown.
• a sleeve 20 is attached.
• the sleeve 20 is tube-like and protrudes beyond the side walls 4, 5.
• a lateral surface 21 of the sleeve 20 has a perforation 22.
• the sleeve 20 is aligned such that the perforation 22 points in the direction of the oil passage opening 18.
• the oil passage opening 18 and the perforation 22 are provided to ensure the oil supply to the storage.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Valve-Gear Or Valve Arrangements (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48536880

Family Applications (1)

Country Status (5)

Cited By (4)

Families Citing this family (3)

Citations (6)

Family Cites Families (2)

• 2012
  • 2012-08-02 DE DE201210213662 patent/DE102012213662A1/de not_active Withdrawn
• 2013
  • 2013-05-29 IN IN10195DEN2014 patent/IN2014DN10195A/en unknown
  • 2013-05-29 KR KR20157002322A patent/KR20150036242A/ko not_active Withdrawn
  • 2013-05-29 CN CN201380039047.2A patent/CN104662263B/zh not_active Expired - Fee Related
  • 2013-05-29 WO PCT/EP2013/061029 patent/WO2014019735A1/de not_active Ceased

Patent Citations (7)

Also Published As

Similar Documents

Legal Events