Anti-eccentric-wear roller type hydraulic tappet valve rocker arm combined device

Abstract

The invention discloses an anti-eccentric-wear roller type hydraulic tappet valve rocker arm combined device which comprises a rocker arm shaft, a valve rocker arm, a hydraulic tappet, a roller and a valve bridge. The rocker arm shaft is sleeved with the valve rocker arm, and the valve rocker arm can swing with the rocker arm shaft as the axis. The hydraulic tappet is arranged at the end part of the valve rocker arm and can move along with the valve rocker arm. The roller is arranged at the lower end part of the hydraulic tappet and can move along with the hydraulic tappet. The valve bridge is arranged below the hydraulic tappet, the top of the valve bridge is provided with a contact plane, and the roller abuts against the contact plane, so that the valve bridge can move along with the hydraulic tappet. According to the anti-eccentric-wear roller type hydraulic tappet valve rocker arm combined device, the problems of eccentric wear and overturning of a valve can be finally solved by improving the stress point change problem of the valve rocker arm and the valve bridge.

Description

technical field [0001] The invention relates to the field of valve rocker arm combination devices, in particular to a roller type hydraulic tappet valve rocker arm combination device for anti-eccentric wear. Background technique [0002] Such as image 3 As shown, in the prior art valve rocker arm combination device, the valve rocker arm is in contact with the valve bridge by a pressure head with a universal joint, and the contact surface of the valve bridge is plane. The valve rocker arm moves up and down, and the valve bridge also moves up and down with the valve rocker arm pressure head, and the valve bridge drives the valve to move up and down, thereby realizing the switch of the valve. [0003] The valve rocker arm combination device of the prior art has the following defects: since the valve rocker arm is centered on the rocker arm axis, the rocker arm is the tangential up and down movement of the radius R, that is, the non-vertical up and down movement, resulting in t...

AI Technical Summary

Problems solved by technology

[0003] The valve rocker arm combination device of the prior art has the following defects: since the valve rocker arm is centered on the rocker arm axis, the rocker arm is the tangential up and down movement of the radius R, that is, the non-vertical up and down movement, resulting in the rocker arm pressure head The point of contact with the valve bridge is not fixed

like image 3 As shown, when the rocker arm angles are A1 and A2, the contact point between the pressure head and the valve bridge will have a distance of a1-a2. The throwing force further acts on the valve stem, causing the valve not to be completely vertically stressed, and also dragged by the front and rear of the valve bridge, which eventually causes the valve to not move vertically up and down completely, resulting in the front and back of the valve valve and the valve seat ring. Severe partial wear

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