The picture shows the trajectory of a point on the upper part of the movable jaw when the crank of the jaw crusher rotates counterclockwise. In the figure, point A is the point farthest from the fixed jaw. From this point, the movable jaw starts to move to the fixed jaw. The sub-velocity of point A in the horizontal direction is zero. Since it needs to move to the right, there must be one in the horizontal direction. The acceleration component to the right is the only way to make the moving jaw have a rightward speed; when the moving jaw moves to point D and point B, its horizontal speed must first increase and then decrease, and become Zero, in this process, the horizontal acceleration must first be the same as the horizontal velocity, and when the horizontal right velocity reaches the maximum, it becomes zero. After this moment, the horizontal acceleration will horizontally move to the left. Although the horizontal velocity of point B is zero, its horizontal acceleration is not zero. The acceleration before and after point B and at point B are horizontal to the left, and after point B, it moves to point C and point A. At the beginning, the velocity and acceleration directions are both horizontal to the left, and the velocity is increased. Because the horizontal velocity at point A becomes zero again, that is, when the moving jaw moves toward point A The horizontal speed is reduced, which requires an acceleration opposite to the speed direction, that is, when the movable jaw approaches point A, its acceleration direction is to the right. This paragraph qualitatively discusses the relationship between the velocity and acceleration in the horizontal direction of a point on the movable jaw during a period of movement.
Since the ADB section is an effective crushing section and the BCA section is a discharge section, only the movement of the ADB section is considered when assuming a suitable point for crushing.
The movement of the movable jaw of the jaw crusher to the fixed jaw is a process. In this process, the material is broken at any moment, in fact, this is random, and it is possible at any moment. All stages can happen.
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