The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2025
Filed:
May. 06, 2020
Xuzhou Heavy Machinery Co., Ltd., Xuzhou, CN;
Xiaodong Hu, Xuzhou, CN;
Tao Zhu, Xuzhou, CN;
Jianchun Yang, Xuzhou, CN;
Xiuzhi Ren, Xuzhou, CN;
Xiaojie Du, Xuzhou, CN;
Xuzhou Heavy Machinery Co., Ltd., Xuzhou, CN;
Abstract
A hydraulic steering system, comprising a steering pump and a plurality of digital steering cylinder assemblies. Each digital steering cylinder assembly includes a steering cylinder and a digital hydraulic valve configured to selectively communicate a rodless cavity of the steering cylinder with one of the steering pump and a return oil circuit, and communicate a rod cavity of the steering cylinder with the other of the steering pump and the return oil circuit. A controller can be configured to emit a digital pulse signal to a motor and cause the digital hydraulic valve to move towards a first working position or a second working position. A mechanical feedback structure can be configured to be driven by a piston rod of the steering cylinder when the valve core of the digital hydraulic valve moves towards the first working position or the second working position, so as to drive the digital hydraulic valve to return to a neutral position. The system can improve the control precision and the response speed of the steering system.