US2425394A - Engine rocker arm - Google Patents

Engine rocker arm Download PDF

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Publication number
US2425394A
US2425394A US551160A US55116044A US2425394A US 2425394 A US2425394 A US 2425394A US 551160 A US551160 A US 551160A US 55116044 A US55116044 A US 55116044A US 2425394 A US2425394 A US 2425394A
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United States
Prior art keywords
rocker arm
arm
engine rocker
bearing
contacting bearing
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Expired - Lifetime
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US551160A
Inventor
Henry C Ronfeldt
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.)
Toledo Stamping and Manufacturing Co
Original Assignee
Toledo Stamping And Mfg Compan
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Publication date
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Priority to US551160A priority Critical patent/US2425394A/en
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Publication of US2425394A publication Critical patent/US2425394A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H51/00Levers of gearing mechanisms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/18Rocking arms or levers
    • F01L1/181Centre pivot rocking arms
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/20Control lever and linkage systems
    • Y10T74/20576Elements
    • Y10T74/20582Levers

Description

Aug. 12, 1947. v c RQNFELDT 2,425,394
ENGINE ROCKER ARM Filed Aug. 25, 194-4 IN V EN TOR.
1 WWW- Patented Aug. 12, 1947 UNITED STATES PATENT OFFICE ENGINE ROCKER ARM Henry C. Ronfeldt, Toledo, Ohio, assignor to Toledo Stamping and Manufacturing Company, Toledo, Ohio, a corporation of Ohio Application August 25, 1944:, Serial No. 551,160
2 Claims. 1
This invention relates toengine rocker arms and more particularly to the contacting bearings used to engage valve stems and tappets in the overhead valve type of internal combustion engme.
Considerable difficulty has been encountered in obtaining a suitable wear resistant surface for the fixed contacting bearing. In many cases the fixed contacting bearing is an integral part of the arm member. In this case the material in the contacting bearing is of necessity the same as the material in the remainder of the arm member. Because of cost, strength, and working qualities the metal used in the arm member is such that a poor quality wearing or bearing surface is provided on the contacting bearing. In some cases a portion or the entire arm has been heat treated in order to harden the contacting bearing. This treatment improves the quality of the bearing surface to some extent but at the same time some of the desirable qualities of the arm members are destroyed. This difiiculty is encountered in cast, forged and some types of stamped engine rocker arms. In some types of stamped sheet metal rocker arms a separate fixed contactingbetween two layers of the arm member and then is copper hydrogen brazed in place. The temperature required for copper hydrogen brazing varies from 2000 to 2100 degrees Fahrenheit. This temperature destroys the wear resisting qualities of the contacting bearing insert. Since the fixed contacting bearing is an integral part or is formed into an integral part of the engine rocker arm it can not be replaced. When the contacting bearing becomes too badly worn a whole new rocker arm is needed in order to provide a new fixed contacting bearing. This is wasteful with respect to material, manpower and finances.
My improved engine rocker arm entirely overcomes the above mentioned difficulties. In my improved rocker arm an independent contacting surface is provided for the rocker arm which is not assembled to the engine rocker arm until all brazing and heat treating is completed.
One object of my invention is to provide an engine rocker arm with an independent contacting bearing cup made of a different metal than the remainder of the engine rocker arm.
Another object of my invention is to provide an engine rocker arm with a contacting bearing cup that can be hardened or heat treated as a separate unit from the arm member.
Another object of my invention is t pr vide an engine rocker arm with a contacting bearing that can be secured to the arm member after the arm member is completely fabricated.
Another object of my invention is to provide an engine rocker arm with a fixed contacting bearing that can be replaced.
With these and other objects in view, my invention consists in the construction, combination and arrangement of the various parts of my improved device as described in the specification, claimed in the claims and illustrated in the accompanying drawing:
In the drawing:
Fig. l is a top plan View of a stamped engine rocker arm embodying my invention.
Fig. 2 is a front elevation of the engine rocker arm shown in Fig. 1.
Fig. 3 is an end view of the engine rocker arm shown in Fig. 1.
Fig. 4 is a sectional View taken along line 44 of Fig. 2.
Referring to the drawings in more detail in Fig. 1, I have shown an engine rocker arm I made of two layer of sheet metal 2-2. The engine rocker arm I is made from a formed sheet metal blank which is folded upon itself forming an eye 3. The eye 3 i threaded. An adjustable contacting bearing 4 provided with a threaded stem is secured in the threaded eye 3. A lock nut 5 locks the adjustable contacting bearing in place. On the opposite end of the engine rocker arm, ears 6 and 1 extend outwardly at substantially right angles to the plane of the layers 2-2. A contact bearing cap member 8 fits over the ears 6 and l. The cup 8 is provided with ears 9-9 which are folded over the ears 6 and 1. In folding the ears 9--9 the cap 8 is securely pulled up against the ears 6 and 1 so that the cup 8 is rigidly held in place. The cap 8 is made from suitable material that is hardened to meet the requirements of a contacting bearing. The Iayers 22 are usually brazed to rigidly fuse the layers into an arm member I. In my novel construction this is done before the cup 8 is secured to the arm,
The contacting bearing cup is provided with a smooth curved surface I!) which engages a valve stem or tappet (not shown).
It will be noted from the above description that my novel contacting bearing cup provides a novel means whereby a bearing is provided that is made of the most desirable material and treated in the most desirable way. The arm member also can be brazed and heat treated without e ectin the fixed contacting bearing,
3 If my novel fixed contacting bearing cup is damaged or worn it can be removed and replaced. In the present style of fixed contacting bearing it is not possible to replace'the bearing member consequently it is necessary to replace the entire engine rocker arm.
While I have described the details of one form of my invention, I do not wish to be limited to the particular form shown and described as it will be apparent that many modifications therein can be made without departing from the scope of my invention as set forth in the appended claims.
Having thus described my invention what I claim is: v
1. An engine rocker arm comprising an arm member, said arm member comprising a plurality of sheet metal layers provided with oppositely extending lugs at one end thereof; a hub intermediate said ends; and a cupped member provided with ears whereby said cupped member is rigidly secured to said lugs.
2. An engine rocker arm comprising a stamped arm member consisting of a plurality of formed sheet metal layers provided with ears extending 4 transversely at one end thereof; a, hub intermediate said ends; and a fixed contacting bearing comprising a cupped member adapted to be removably secured to said ears.
HENRY C. RONFELDT.
EEFERENCES CKTED The following references are of record in the file of this patent:
US551160A 1944-08-25 1944-08-25 Engine rocker arm Expired - Lifetime US2425394A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19615088A1 (en) * 1996-04-17 1997-10-23 Schaeffler Waelzlager Kg Rocker for valve drive of internal combustion engine
DE19645788A1 (en) * 1996-11-07 1998-05-14 Schaeffler Waelzlager Ohg Chipless shaped rocker arm
US9488076B2 (en) 2014-09-09 2016-11-08 Caterpillar Inc. Method of remanufacturing a rocker arm and remanufactured rocker arm

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191511724A (en) * 1915-08-13 1916-07-06 Straker Squire 1913 Ltd Improvements in Mounting Oscillating Levers and the like.
US1424161A (en) * 1922-08-01 Hammer
US1449611A (en) * 1921-01-14 1923-03-27 Otto Konigslow Mfg Company Stamped metal lever
US1463167A (en) * 1922-10-07 1923-07-31 Henry E Keyes Hammer
US1594558A (en) * 1925-10-19 1926-08-03 George R Rich Valve tappet
US1699656A (en) * 1926-05-28 1929-01-22 John T Fagan Rocker arm
FR754905A (en) * 1933-04-19 1933-11-16 Dolmazon Et Exbrayat Improvements to vices with removable jaws and movable clamping jaws
US2207332A (en) * 1939-06-13 1940-07-09 Curtis Anti Vapor Pumps Inc Shim
US2288831A (en) * 1940-10-10 1942-07-07 Allis Chalmers Mfg Co Engine rocker arm

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1424161A (en) * 1922-08-01 Hammer
GB191511724A (en) * 1915-08-13 1916-07-06 Straker Squire 1913 Ltd Improvements in Mounting Oscillating Levers and the like.
US1449611A (en) * 1921-01-14 1923-03-27 Otto Konigslow Mfg Company Stamped metal lever
US1463167A (en) * 1922-10-07 1923-07-31 Henry E Keyes Hammer
US1594558A (en) * 1925-10-19 1926-08-03 George R Rich Valve tappet
US1699656A (en) * 1926-05-28 1929-01-22 John T Fagan Rocker arm
FR754905A (en) * 1933-04-19 1933-11-16 Dolmazon Et Exbrayat Improvements to vices with removable jaws and movable clamping jaws
US2207332A (en) * 1939-06-13 1940-07-09 Curtis Anti Vapor Pumps Inc Shim
US2288831A (en) * 1940-10-10 1942-07-07 Allis Chalmers Mfg Co Engine rocker arm

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19615088A1 (en) * 1996-04-17 1997-10-23 Schaeffler Waelzlager Kg Rocker for valve drive of internal combustion engine
DE19615088B4 (en) * 1996-04-17 2006-09-07 Schaeffler Kg Sliding lever bearing for a drag lever of a valve train of an internal combustion engine
DE19645788A1 (en) * 1996-11-07 1998-05-14 Schaeffler Waelzlager Ohg Chipless shaped rocker arm
US6253636B1 (en) 1996-11-07 2001-07-03 Ina Walzlager Schaeffler Ohg Finger lever shaped without cutting
US9488076B2 (en) 2014-09-09 2016-11-08 Caterpillar Inc. Method of remanufacturing a rocker arm and remanufactured rocker arm
CN106687668A (en) * 2014-09-09 2017-05-17 卡特彼勒公司 Method of remanufacturing a rocker arm and remanufactured rocker arm

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