Pretightening force regulating device of front axle hub bearing of automobile

Abstract

The invention relates to a pretightening force regulating device of a front axle hub bearing of an automobile, belonging to an automobile steering device. The invention is characterized in that the left cylindrical end section of the steering knuckle spindle is provided with an external thread, leftward and rightward rectangular stopping straight flutes are symmetrically formed back and forth on the left cylindrical end section of the steering knuckle spindle, an annular antifriction baffle plate of which the inner diameter is provided with rectangular lugs is sheathed on the left cylindrical end section of the steering knuckle spindle, the rectangular lugs of the antifriction baffle plate are correspondingly nested in the rectangular stopping long straight flutes in the left cylindrical end section of the steering knuckle spindle to play the stopping role, an regulating nut with screw holes symmetrically formed at hexagonal sharp-angled parts is screwed on the left cylindrical end section of the steering knuckle spindle, the pretightening force can be achieved by tightening the regulating nut, an annular locking plate of which the circumference is provided with uniformly-distributed through holes and the inner diameter is provided with rectangular lugs symmetrically formed back and forth is mounted at the left side of the regulating nut on the steering knuckle spindle, and bolts are inserted in the through holes of the locking plate correspondingly communicated with the screw holes of the regulating nut and are tightened to keep the hub bearing in an optimal working state. Thus, the service life can be ensured.

Description

technical field [0001] The invention belongs to an automobile steering device, in particular to an automobile wheel hub bearing pretightening force adjusting device. Background technique [0002] Existing automobiles, especially heavy-duty trucks, the front axle hub bearing pretightening force adjustment device usually adopts the method that the end of the steering knuckle with a radial through hole is matched with the slotted nut and locked by a cotter pin. After the hub bearing is pre-tightened, the notch of the slotted nut is out of line with the radial through hole at the end of the steering knuckle, so that the cotter pin cannot pass through, and the slotted nut has to be turned again to make the slot of the slotted nut The opening and the radial through hole at the end of the steering knuckle are correspondingly on the same straight line, resulting in changes in the preload of the hub bearing, often failing to meet the preset requirements, resulting in the hub bearing ...

AI Technical Summary

Problems solved by technology

[0002] Existing automobiles, especially heavy-duty trucks, the front axle hub bearing pretightening force adjustment device usually adopts the method that the end of the steering knuckle with a radial through hole is matched with the slotted nut and locked by a cotter pin. After the hub bearing is pre-tightened, the notch of the slotted nut is out of line with the radial through hole at the end of the steering knuckle, so that the cotter pin cannot pass through, and the slotted nut has to be turned again to make the slot of the slotted nut The opening and the radial through hole at the end of the steering knuckle are correspondingly on the same straight line, resulting in changes in the preload of the hub bearing, often failing to meet the preset requirements, resulting in the hub bearing not being in a normal working state, seriously affecting the performance of the hub bearing and service life

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