Eccentric element
First Claim
1. An eccentric element intended for ground vibrators, said element including a radially movable eccentric mass (2) arranged on a rotatable shaft (1), said mass being able to assume an inward position and as a result of the rotation of the shaft an outward position in which the distance between the centre of gravity (14) of the eccentric mass and the centreline (15) of the rotating shaft is larger than in the inward position, characterized in that the eccentric mass (2) is lockable in both its inward and outward position by the action of a displaceable locking piston (9) arranged in a recess (16) in the rotating shaft (1), and which can be manoeuvered to assume a position entirely thrust back into the recess (16) wherein the eccentric mass (2) is released, or a thrust-out position in which the locking piston (9) locks the eccentric mass (2) in its inward or outward position enabling the eccentric mass to be in its position independent of the speed of rotation of the shaft (1).
0 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to an eccentric element for generating oscillations in ground vibrators. The eccentric element comprises an eccentric mass (2) radially movable on a rotatable shaft (1). The mass is movable to assume a position displaced in relation to the centerline (15) of the shaft when the shaft (1) is rotated, thus causing the amplitude of the generated oscillation to be changed. To enable control of the amplitude, the eccentric mass (2) is lockable by means of a displaceable locking piston (9) arranged in a recess (16) in the rotating shaft (1). The locking piston (9) can thus assume a position entirely thrust-back into the recess (16), wherein the eccentric mass (2) is released, or a thrust-out position in which the locking piston fixes the eccentric mass (2) in one of its end positions.
38 Citations
8 Claims
- 1. An eccentric element intended for ground vibrators, said element including a radially movable eccentric mass (2) arranged on a rotatable shaft (1), said mass being able to assume an inward position and as a result of the rotation of the shaft an outward position in which the distance between the centre of gravity (14) of the eccentric mass and the centreline (15) of the rotating shaft is larger than in the inward position, characterized in that the eccentric mass (2) is lockable in both its inward and outward position by the action of a displaceable locking piston (9) arranged in a recess (16) in the rotating shaft (1), and which can be manoeuvered to assume a position entirely thrust back into the recess (16) wherein the eccentric mass (2) is released, or a thrust-out position in which the locking piston (9) locks the eccentric mass (2) in its inward or outward position enabling the eccentric mass to be in its position independent of the speed of rotation of the shaft (1).
Specification