Metal working – Means to assemble or disassemble – Valve applying or removing
Patent
1988-01-22
1989-11-14
Hartman, Judy
Metal working
Means to assemble or disassemble
Valve applying or removing
292814, B23P 1904
Patent
active
048797960
ABSTRACT:
A valve inserting apparatus for an internal combustion engine has a cylinder head of the engine supported by a jig such that its surface on a combustion chamber side is positioned facing upward and the longitudinal axis of a valve guide assembled to the cylinder head is kept vertical while a valve is inserted into the valve guide from above. The valve inserting apparatus includes a valve inserting unit for moving upwards and downwards. A valve holding device detachably, swingably, holds the valve with its head portion facing upward. A valve push-in device is provided and a suction device moves into contact with a lower end of the valve guide. The push-in device comprises an upwardly and downwardly movable push rod having a weight attached to the upper end portion. The push rod abuts the head portion of the valve from above. The valve inserting unit includes a first detector for detecting whether or not the push rod is at a position higher than a first predetermined reference position, such that the position of the push rod when the push rod in abutment with the valve and the valve inserting unit has been lowered to a predetermined position where the lower end of the valve has been inserted into an upper end of the valve guide to a predetermined depth. The valve inserting device further includes a second detector for detecting whether or not the push rod is at a position lower than a second predetermined reference position, that is, the position of the push rod when the lower end of the valve reaches the stem seal.
REFERENCES:
patent: 2286695 (1942-06-01), Taylor
patent: 4675969 (1987-06-01), Sciaky et al.
Honda Norio
Kobayashi Akifumi
Koide Shigeyuki
Nakamura Katsumi
Tamura Kazufumi
Dainichi Kogyo Kabushiki Kaisha
Hartman Judy
Honda Giken Kogyo Kabushiki Kaisha
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