Internal circulation structure of screw and nut assembly for commercial vehicle

Abstract

The invention relates to the technical field of commercial vehicles, in particular to an internal circulation structure of a screw-nut assembly for a commercial vehicle. The structure comprises a steering engine shell assembly and a steering engine side cover, the steering engine side cover is connected to the outer wall of one end of the steering engine shell assembly through screws. The inner wall of the end, close to the steering engine shell assembly, of the steering engine side cover is sleeved with a rocker arm shaft bearing. The outer wall of the end, perpendicular to the steering engine side cover, of the steering engine shell assembly is connected with a steering engine valve body through screws. The inner wall of the steering engine valve body is sleeved with a screw bearing; a steering screw is connected to the inner wall of the screw bearing through a bearing; the outer wall of the steering screw is in threaded connection with a steering nut, a reverser is in clamp connection onto the inner wall of the steering nut, a steel ball is in rolling connection to the internal of the reverser, and the steel ball is tangent with the outer wall of the steering screw. According tothe invention, the problem that an outer circulation structure guide pipe fails is solved, noise is reduced, transmission efficiency is improved, and the outer circulation structure guide pipe has acertain popularization value.

Description

technical field [0001] The invention relates to the technical field of commercial vehicles, in particular to an internal circulation structure of a screw nut assembly for commercial vehicles. Background technique [0002] The world is developing rapidly, the concept of time is getting higher and higher, and people's demand for cars is becoming more and more important. New energy and driverless cars are not limited to lip service. Some companies have cooperated with domestic FAW, Foton, BAIC, King Long and other domestic first-class automobile factories have cooperated in the development of intelligent steering, and some products have achieved very good results in domestic driverless car competitions. [0003] Domestic automobile manufacturers have also put forward requirements for intelligent steering of commercial vehicles. With the in-depth research on the electric recirculating ball steering device of commercial vehicles, it is found that a very important failure mode of ...

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Problems solved by technology

[0003] Domestic automobile manufacturers have also put forward requirements for intelligent steering of commercial vehicles. With the in-depth research on the electric recirculating ball steering gear of commercial vehicles, it is found that a very important failure mode of the electric recirculating ball steering gear is that the screw nut inside the steering machine is stuck, and the screw The nut assembly has been improved many times, but this failure mode still exists. The steering gear is a key component on the vehicle. Once it fails, it will seriously affect the safety of drivers and pedestrians. If this problem is not solved, this product will die

[0004] The original screw nut assembly uses an external circulation structure. Due to structural limitations, the conduit wall is very thin, with a thickness of 1mm, and it is easily damaged after being stressed. Therefore, an internal circulation structure of the screw nut assembly for commercial vehicles is needed to solve the above problems. out of improvement

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