Extendable Screed Height Adjusting System with Angle of Attack Adjustment

摘要

An extendable screed has independent height and angle of attack adjustment for a lower extender frame. At least one post and cylinder assembly are used to couple the lower extender frame to an upper extender frame at a pin that allows rotation of the lower extender frame relative to the upper extender frame. A vertical adjuster uses a drive rod with a pivoting attachment at the lower extender frame. An axis of rotation of the pin and an axis of rotation of the pivoting attachment are co-linear. This arrangement allows lower extender frame to move vertically while allowing angle of attack adjustments to be made about the co-linear axes of rotation. Simple screw adjusters displaced from the axis of the pin and collet assemblies allow raising and lowering the back of the lower extender frame to adjust the angle of attack.

主权项

1. An adjustment apparatus for adjusting an extendable screed relative to a main screed, the adjustment apparatus comprising:
an upper extender frame coupled to one or more extend tubes of the main screed; a height tube coupled to the upper extender frame; a post movably inserted in the height tube; a first bracket attached to a lower portion of the post, the first bracket including an ear; a lower extender frame having a bulkhead plate; and a pin disposed through the ear and the bulkhead plate that rotatably couples the first bracket to the lower extender frame about a longitudinal axis of the pin.