Articulated lever tensioning device
AssigneeFesto AG & Co.
InventorsUwe Glasenapp, Thomas Lichtenberger
Life of this patent
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Abstract
A toggle lever clamping device has a bearing head (15) arranged on an actuating means (2), on which head a pivot unit (16), which comprises a clamping arm (22), may be moved between a release position and a clamping position. An abutment face (48) is provided on the bearing head (15) for presetting the clamping position of the clamping arm (22), such abutment being in the path of pivoting of the pivot unit (16) and serving for presetting the clamping position by cooperating with the pivot unit (16).
Claims15
A toggle lever clamping device comprising:
- a bearing head (15) terminally arranged on an actuator (2);
- a pivot unit (16) having a clamping arm (22), the pivot unit is pivotally mounted for movement (17) about a pivot axis between a release position and a clamping position;
- an actuating rod (12), plunging into the bearing head (15) of the actuator (2);
- an intermediate member (24) articulated at a first bearing point (25) with the actuating rod (12) and at a second bearing point (27) with the pivot unit, the second bearing point spaced a distance from the pivot axis (17) of the pivot unit;
- an abutment face (48) being provided on the bearing head (15) wherein the abutment face (48) is positioned in the path of motion of the pivot unit (16) and cooperates with the pivot unit (16) for presetting the clamping position;
- and
- wherein the actuator is extendable to a first position in which the clamping arm is moved to the clamping position, and the actuator is further extendable to a second position beyond the first position such that the clamping arm is securely retained in the clamping position.
The clamping device as claimed in 7, characterized in that the contact between the pivot unit (16) and the abutment face (48) takes place approximately 3 to 5 degrees prior to reaching the dead center position.
The clamping device as claimed in 7, characterized in that the joint connection at one of the two bearing points (25 and 27) at least is so designed that at least on passing through the dead center position there is a possibility of radial relative movement between the parts which are articulated with each other.
A toggle lever clamping device comprising:
- a bearing head terminally arranged on an actuator;
- a pivot unit having a clamping arm, the pivot unit is pivotally mounted for movement about a pivot axis between a release position and a clamping position;
- an actuating rod plunging into the bearing head of the actuator;
- an intermediate member articulated at a first bearing point with the actuating rod and at a second bearing point with the pivot unit, the second bearing point spaced a distance from the pivot axis of the pivot unit;
- and
- an abutment face being provided on the bearing head wherein the abutment face is positioned in the path of motion of the pivot unit and cooperates with the pivot unit for presetting the clamping position;
- and
- a stroke limiting means cooperating with the actuating rod, the stroke limiting means taking effect after the pivot unit has come into engagement with the abutment face.
A toggle lever clamping device comprising:
- a bearing head terminally arranged on an actuator;
- a pivot unit having a clamping arm, the pivot unit is pivotally mounted for movement about a pivot axis between a release position and a clamping position;
- an actuating rod plunging into the bearing head of the actuator;
- an intermediate member articulated at a first bearing point with the actuating rod and at a second bearing point with the pivot unit, the second bearing point spaced a distance from the pivot axis of the pivot unit;
- an abutment face being provided on the bearing head wherein the abutment face is positioned in the path of motion of the pivot unit and cooperates with the pivot unit for presetting the clamping position;
- and
- a second abutment face for presetting the release position being provided on the bearing head clear of the actuator against which a counter abutment face provided on the actuating rod may abut on inward motion of the actuating rod.
A toggle lever clamping device comprising:
- a bearing head terminally arranged on an actuator;
- a pivot unit having a clamping arm, the pivot unit being pivotally mounted about a pivot axis and movable between a release position and a clamping position;
- an actuating rod extending into the bearing head;
- an intermediate member articulated at a first bearing point with the actuating rod and at a second bearing point with the pivot unit, the second bearing point be spaced a distance from the pivot axis;
- an abutment face being provided on the bearing head wherein the abutment face is positioned in the path of motion of the pivot unit and cooperates with the pivot unit for presetting the clamping position;
- and
- wherein the abutment face is so arranged that the pivot unit comes into engagement with the abutment face just prior to reaching a dead center position of the toggle lever arrangement, the dead center position occurring when a reference angle formed by a longitudinal axis of the actuating rod and a line extending between the first and the second bearing points is approximately 90 degrees, and wherein the actuator is extendable beyond the dead center position such that the reference angle is an acute angle.
Dependencies are inferred from the claim text.