Shell and circulating ball type electric steering device

Abstract

The invention discloses a shell and a circulating ball type electric steering device. The device comprises: a main body structure, wherein the interior of the main body structure is internally provided with an inner wall, and the inner wall divides the interior of the main body structure into a recirculating ball speed reducing mechanism chamber and a worm gear chamber; and a third main body, wherein the interior of the third main body is provided with a worm chamber, and the worm gear chamber is communicated with the worm chamber to form a worm and gear reducing mechanism chamber; A screw bearing seat is arranged on the inner wall, and a worm bearing seat is arranged in the third main body. According to the device, the circulating ball screw and the worm can be effectively positioned, meanwhile, the mounting sizes of the worm gear and the worm are effectively controlled, manual axial clearance adjustment is not needed again, the situation that the product assembling quality is affected due to different skills of assembling personnel is reduced, therefore the assembling precision and the assembling efficiency are improved, the influence of human factors is reduced, and automatic production is easy to realize.

Description

technical field [0001] The invention relates to the technical field of electric steering devices, in particular to a housing and a recirculating ball type electric steering device. Background technique [0002] Commercial vehicles will gradually adopt the recirculating ball electric steering device (X-EPS) as the standard configuration of power steering, which consists of motors, controllers, sensors and mechanical parts. [0003] The main function of the mechanical part is to amplify the output torque of the motor through deceleration and boosting to drive the vehicle to achieve steering. [0004] The mechanical part of X-EPS consists of a worm gear reduction mechanism, a recirculating ball reduction mechanism and a rack and pinion mechanism. The above reduction mechanism is installed in a shell with intersecting shaft holes. The motor amplifies the steering wheel control hand force servo through multi-stage reduction. , so as to play a power steering effect. [0005] The...

AI Technical Summary

Problems solved by technology

[0005] The original X-EPS adopts a split structure, which is composed of more than two shells. The worm gear deceleration part and the recirculating ball deceleration part are respectively installed in the cavity of the deceleration mechanism composed of different shells, and then the shells of the two deceleration mechanisms are connected by bolts. The body is connected together to form an assembly, which will increase the volume of the device, increase the weight and inaccurate positioning of the shaft system. It is necessary to manually adjust the clearance during assembly, which will affect the assembly efficiency and effect, and will also affect the consistency of the product. Conducive to stable mass production

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