An electric power steering anti-seizure worm device

Abstract

The invention relates to an electric power steering scuffing-resistant worm device. The electric power steering scuffing-resistant worm device comprises a motor shaft, a coupler and a worm, wherein the motor shaft is connected with one end of the worm through the coupler, a large bearing is connected with the end, connected with the coupler, of the worm, and a small bearing is connected with the other end of the worm; the large bearing comprises a fixing outer ring I, an arc outer ring, rollers and an inner ring, the fixing outer ring I sleeves the outer side of the arc outer ring, and the rollers are mounted between the arc outer ring and the inner ring; a fixing outer ring II sleeves the outer side of the small bearing and is made from a thermal plasticity material, and a plurality arc hollow spacing layers are uniformly arranged at the radial middle part of the fixing outer ring II along the circumference. According to the electric power steering scuffing-resistant worm device, the structure is simple, the special bearings are mounted at the two ends of the worm, the bending deformation of the worm under a large load is released, the bending deformation of the worm is disappeared after the load is discharged, and the worm wheel and the worm run smoothly and do not generate a scuffing situation, so that the fact that the steering system normally works is ensured.

Description

technical field [0001] The invention relates to the field of worm gear devices, in particular to an electric power steering anti-seizure worm device. Background technique [0002] The electric power steering system generally outputs the power of the motor to the steering gear through the worm gear. Under certain impact conditions, the load transmitted by the worm gear is too large. Because the two ends of the worm are supported by bearings, the deformation of the middle tooth segment is large, and the worm and worm gear It is very easy to bite to death, causing the steering system to fail. Since the positions of the worm and the worm wheel are fixed, the structure is also fixed, so an anti-seizure structure is needed. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an electric power steering anti-seizure worm device, which has a simple structure. By installing special bearings at both ends of the worm, the bendin...

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Problems solved by technology

[0002] The electric power steering system generally outputs the power of the motor to the steering gear through the worm gear. Under certain impact conditions, the load transmitted by the worm gear is too large. Because the two ends of the worm are supported by bearings, the deformation of the middle tooth segment is large, and the worm and worm gear It is very easy to seize and cause the steering system to fail. Since the position of the worm and the worm wheel is fixed, the structure is also fixed, so an anti-seizure structure is needed

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