Electronic power assisted steering with pre-twist

Abstract

The invention discloses an electronic power auxiliary steering device with a pre-tension function. The device is connected with a torsion sensor in a vehicle. The power auxiliary steering device is mainly characterized in that a complex number of annually arranged fixing blocks are fixedly arranged on an inner side of a ring body of a retainer; movable convex blocks are fixedly arranged among the fixing blocks; springs are arranged among the convex blocks and the inner side wall of the ring body in a propped manner; in the normal state, the springs enable the convex blocks to be propped against the periphery of a stopper block in the center of the ring body; the stopper block is connected with an upper rotating shaft; a ring body bottom plate of the retainer is connected with a lower rotating shaft; the upper rotating shaft and the lower rotating shaft are respectively clamped to two ends of a torsion rod; a positioning block for being connected with an upper ring rotor of the torsion sensor is arranged at the bottom end of the upper rotating shaft. According to the structure, the elastic strength of the convex blocks and the springs can be adjusted according to demands, so that the pre-tension power can be changed, and the purpose of improving the durability is achieved.

Description

technical field [0001] The invention relates to an electronic power auxiliary steering device with a pre-twisting function applied to a vehicle, in particular to an electronic power auxiliary steering device with a pre-twisting function which has good durability and can maintain the operating feel of a steering rod. Background technique [0002] The steering pre-twist device currently used in vehicles (such as ATVs, multi-purpose vehicles) mainly uses the male thread of the upper shaft connected under the handle to correspond to the female thread of the lower shaft connected to the wheel. Resistance is generated to achieve the effect of pre-twisting. Since the other end of the lower shaft relative to the female thread is engaged with the upper ring rotor of a torque sensor, when the male thread of the upper shaft engages the female thread of the lower shaft When the lower shaft is driven to rotate, the upper ring rotor of the torque sensor will rotate accordingly. At this ti...

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Problems solved by technology

[0003] However, the above-mentioned pre-twisting device uses the interlocking of the male and female screws to generate resistance. After using this friction device for a period of time, the tooth shape will be worn away, so that the pre-twisting force will gradually change and affect the steering wheel in the future.

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