Power-operated tightening nut
AssigneeLudwig Ehrhardt GmbH
InventorsNils Kolb, Thomas Willingshofer
Life of this patent
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Abstract
The invention relates to a power-operated tightening nut (1) for axially tightening a fastening bolt, using an adjusting system (1) for adjusting the tightening force acting on the fastening bolt (2). The invention further provides an integrated display (24) for displaying the tightening force acting on the fastening bolt (2).
Claims19
A power-operated tightening nut for axially tightening a fastening bolt with an adjustable tightening force, comprising:
- an adjusting device for adjusting the tightening force acting on the fastening bolt;
- and
- a display for displaying the tightening force acting on the fastening bolt,
- wherein an axial position of the display relative to the fastening bolt reflects the tightening force acting on the fastening bolt.
A power-operated tightening nut for axially tightening a fastening bolt with an adjustable tightening force, comprising:
- an adjusting device for adjusting the tightening force acting on the fastening bolt;
- a display for displaying the tightening force acting on the fastening bolt;
- a housing pot having a contact surface on a front side for resting against a counter bearing surface and having a hole on the front side for insertion of the fastening bolt into the housing pot;
- a threaded portion for screwing onto the fastening bolt, wherein the threaded portion is arranged in the housing pot and is rotatable and axially movable in said housing pot;
- and
- a spring which axially pretightens the threaded portion relative to the housing pot such that an axial position of the threaded portion determines the tightening force acting on the fastening bolt,
- wherein the adjusting device comprises a rotatable adjusting screw accessible from the outside in addition to a transmission gear for translating a rotary movement of the adjusting screw into a rotary movement of the threaded portion.
A power-operated tightening nut for axially tightening a fastening bolt with an adjustable tightening force, comprising:
- an adjusting device for adjusting the tightening force acting on the fastening bolt;
- a display for displaying the tightening force acting on the fastening bolt;
- a housing pot having a contact surface on a front side for resting against a counter bearing surface and having a hole on the front side for insertion of the fastening bolt into the housing pot;
- a threaded portion for screw ing onto the fastening bolt, wherein the threaded portion is arranged in the housing pot and is rotatable and axially movable in said housing pot;
- and
- a spring which axially pretightens the threaded portion relative to the housing pot such that an axial position of the threaded portion determines the tightening force acting on the fastening bolt,
- wherein the rotatable threaded portion has a radially projecting and annularly encircling collar, wherein the spring is supported, on the one hand, on the collar of the threaded portion and, on the other hand, on a base of the housing pot.
Dependencies are inferred from the claim text.