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:
Mar. 14, 2023
Filed:
Jul. 25, 2019
Xuzhou Xugong Foundation Construction Machinery Co., Ltd., Xuzhou, CN;
Li Zhang, Xuzhou, CN;
Zhonghai Zhang, Xuzhou, CN;
Jiguang Zhang, Xuzhou, CN;
Weixiang Lv, Xuzhou, CN;
Yonghua Zhang, Xuzhou, CN;
Peng Wang, Xuzhou, CN;
Jinlong Lu, Xuzhou, CN;
Ming Li, Xuzhou, CN;
Changjian Qin, Xuzhou, CN;
Abstract
A push-pull force control method for a horizontal directional drilling machine with the following steps is provided. According to a correspondence relationship between a motor displacement and a maximum push-pull force of a drilling machine, the motor displacement is first adjusted, so that the required push-pull force can be obtained through the adjustment of the subsequent steps. Then, an oil feeding pressure of the motor is controlled according to a relationship between the push-pull force and the working pressure difference of the motor. Finally, the push-pull force of the motor is controlled in real time according to the oil feeding pressure of the motor to be equal to the required push-pull force value.