Anti-eccentric-wear ball type valve rocker arm combined device

Abstract

The invention discloses an anti-eccentric-wear ball type valve rocker arm combined device which comprises a rocker arm shaft, a valve rocker arm, an adjusting bolt, a ball, a valve bridge and a valve. The valve rocker arm is arranged on the rocker arm shaft in a sleeving manner, and the valve rocker arm can swing with the rocker arm shaft as the axis. The adjusting bolt is arranged at the end of the valve rocker arm and can move along with the valve rocker arm. The ball is arranged at the lower end of the adjusting bolt and can move along with the adjusting bolt. The valve bridge is arranged below the adjusting bolt, a guide groove is formed in the top of the valve bridge, and the ball abuts against the guide groove so that the valve bridge can move along with the adjusting bolt. According to the anti-eccentric-wear ball type valve rocker arm combined device, the problems of eccentric wear and overturning of the valve can be finally solved by reducing the problem of stress point changing 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 ball type valve rocker arm combination device for preventing partial wear. Background technique [0002] Prior art valve rocker combination devices, such as image 3 As shown, 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 flat. 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 disadvantages: since the valve rocker arm is centered on the rocker arm shaft and the rocker arm is the tangential up and down movement of the radius R, that is, the non-perpendicular up and down movement, resulting in the rocker a...

AI Technical Summary

Problems solved by technology

[0003] The valve rocker arm combination device of the prior art has the following disadvantages: since the valve rocker arm is centered on the rocker arm shaft and the rocker arm is the tangential up and down movement of the radius R, that is, the non-perpendicular 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 respectively, the contact point between the pressure head and the valve bridge will have a distance of a1-a2. The frictional dragging force further acts on the valve stem, causing the valve to not be fully vertically stressed, but also being dragged by the front and rear of the valve bridge, which eventually causes the valve to not move vertically up and down completely, causing the valve and the valve seat to The front and rear partial wear is serious

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