JPS6367603U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway elevational view of a first embodiment of a valve timing switching device according to the present invention. FIG. 2 is a sectional view taken along the line -- in FIG. 1. FIG. 3 is a sectional view taken along the line -- in FIG. 2. FIG. 4 is a partially cutaway view of FIG. 2 in the direction of the arrows. FIG. 5 is a top view of a valve mechanism according to a second embodiment of the present invention. Figure 6 is the same as in Figure 5.
It is a sectional view along a line. FIG. 7 is a view taken along the arrows in FIG. Figure 8 shows the 7th stage during low speed operation.
It is a sectional view taken along the line - in the figure. FIG. 9 is a sectional view similar to FIG. 8 showing the state of high-speed operation. 1a, 1b...Intake valve, 2...Camshaft, 3a, 3b
...low speed cam, 4...high speed cam, 5...first bucket lifter, 6...second bucket lifter, 7...third bucket lifter, 8...guide block, 9...spring receiver, 10...coil spring, 11...coupling device, 12a ，
12b...Retainer, 13a, 13b...Valve spring, 14, 15...Guide hole, 16a, 16b
...Guide recess, 17, 18...Permanent magnet, 19a,
19b...stop spring, 20, 21...piston, 22a, 22b...oil passage, 23a, 23b...protrusion, 24a, 24b...recess, 26...first rocker arm, 27...second rocker arm, 28...third rocker arm, 26a, 27a , 28a... Cam slipper, 29... Locker shaft, 30a, 30b... Tappet screw, 31a, 31b... Lock nut, 32
...Cylinder head, 32a...Guide hole, 33...Lifter, 33a...Step part, 34...Coil spring, 35...
Stop ring, 36, 37...Guide hole, 38,
39... Small diameter part, 40, 41... Step part, 42a, 42
b...Guide recess, 43, 44...Diameter expansion step, 45,
46... Piston, 47, 48... Coil spring, 50
...Stop ring, 51, 52...Cap, 53
, 54...Gap, 55...Passage, 56a, 56b...Oil passage, 57a, 57b...Communication hole.

Claims (1)

[Claims for Utility Model Registration] (1) A first cam and a second cam that rotate synchronously with the crankshaft and have a shape set according to the operating speed range of the engine are integrally connected. a camshaft installed in the intake port or exhaust port of the combustion chamber, a valve that is normally biased to close by a spring means and driven to open by the cam, and a valve that is in sliding contact with the first cam and that is connected to the cam. a first transmission member that transmits the lift to the valve; a second transmission member that is disposed around the second cam and transmits the lift of the cam to the valve; and both the first and second transmission members. A valve operation timing switching device for an internal combustion engine, the device having a coupling device for selecting coupling or non-coupling between the valve operation timing switching device, the valve timing switching device for an internal combustion engine having a coupling device for selecting coupling or non-coupling between the valve operation timing switching device, the valve operation timing switching device for an internal combustion engine having a coupling device for selecting coupling or non-coupling between the valve timing switching device, and the valve timing switching device for an internal combustion engine. a connecting member that slides together; a first biasing means that is provided on the one transmission member and that constantly biases the connecting member in the retracting direction; A valve timing switching device for an internal combustion engine, comprising: a second biasing means for biasing; and a receiving portion for a protrusion of the connecting member provided on the other of the two transmission members. (2) Utility model registration claim 1, characterized in that the first biasing means is based on magnetic force.
A valve operation timing switching device for an internal combustion engine as described in 2.