Title:
CAM FOLLOWER DEVICE FOR VALVE SYSTEM FOR ENGINE
Document Type and Number:
Japanese Patent JPH0331503
Kind Code:
A
Abstract:
PURPOSE:To improve the high speed following performance by constituting the cam follower device which is installed at the edge part on the cam side of a locker arm so that an outer wheel made of ceramics is bearing-supported through a needle group by a shaft which is supported between a pair of supporting wall parts and has a hardened intermediate part. CONSTITUTION:A pair of supporting wall parts 17 and 17 are formed, keeping an interval, at the edge part on the cam side of a locker arm 3 which contacts the outer peripheral surface of a cam on a cam shaft and transmits the movement of the cam to an intake/exhaust valves and circular through holes 18 and 18 are formed at the matched position at the center part of each supporting wall part 17. The both edge parts of a hollow annular shaft 19 made of bearing steel are internally fitted into the through holes 18 and 18, and the both edge parts of the shaft 19 are caulking-fixed onto the supporting wall part 17. After the middle part of the shaft 19 is hardened by the high frequency hardening, etc., the outer wheel 21 made of ceramics is rotatably bearing-supported through a plurality of steel needles 20, and the dimension of the gap which exists in the part where the needle 20 is installed is regulated within a prescribed range in relation to the inside diameter Di of the outer wheel 21.
Inventors:
KADOKAWA SATOSHI
Application Number:
JP16536589A
Publication Date:
February 12, 1991
Filing Date:
June 29, 1989
Export Citation:
Assignee:
NIPPON SEIKO KK
International Classes:
F01L1/14; F01L1/18; (IPC1-7): F01L1/18
Attorney, Agent or Firm:
Kinzo Oyama (1 person outside)
Next Patent: HYDRAULIC TYPE VALVE RUSH ADJUSTOR