Anti-eccentric wear ball type hydraulic tappet valve rocker arm assembly manufacturing method

1. The utility model relates to the field of valve and rocker arm combination devices, in particular to a ball type hydraulic tappet valve and rocker arm combination device for preventing eccentric wear.

Background technique:

2. The prior art valve rocker arm assembly, as shown in Figure 2, the valve rocker arm is contacted 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 pressure head of the valve rocker arm. The valve bridge drives the valve to move up and down, thereby realizing the opening and closing of the valve.

3. The prior art valve rocker arm assembly device has the following shortcomings: Because the valve rocker arm is centered on the rocker arm axis and the rocker arm is the tangent to the radius r, it moves up and down, that is, non-vertical up and down movement, resulting in the rocker arm The contact point between the indenter and the valve bridge is not fixed. As shown in Figure 2, when the rocker arm angles are a1 and a2 respectively, the contact point between the indenter and the valve bridge will be a1

At the distance of a2, this indenter creates a forward and backward frictional force on the valve bridge along the a1 direction, and this frictional drag force further acts on the valve stem, causing the valve to not be completely vertical up and down, but is also affected by the valve. The dragging of the front and back of the bridge eventually caused the valve to not be able to move up and down completely, causing serious front and rear eccentric wear of the valve and valve seat.

4. The information disclosed in the background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as an acknowledgement or any form of suggestion that the information constitutes the existing information known to those of ordinary skill in the art. Technology.

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