Abstract: The transportation industry plays an indispensable role in the national economy. As a carrier in the transportation industry, the maintainability and cab comfort of commercial vehicles are affected by the hydraulic cab tilting system. In order to achieve lower manufacturing and design costs, a new cab hydraulic system and hydraulic integrated valve structure were designed. The follow-up function of the new cab hydraulic system was undertaken by the hydraulic valve, and the parameters of the hydraulic valve could be adjusted by springs. In this paper, catia software was used to model the structure of the hydraulic valve, and matlab software was used to model and simulate the lifting process. The adjustable spring structure parameters of the hydraulic valve were affected by the lifting force. The analysis results showed that the new cab hydraulic system met the requirements of various working conditions of the cab, and the functions realized by the new hydraulic valve were consistent with the schematic diagram of the hydraulic system. The simulation results showed that the maximum lifting force during the lifting process was 19 112 N, which was basically consistent with the experimental results.

Key words: Commercial vehicle cab; Hydraulic system; Maximum lift force

摘要： 物流运输行业在国民经济中扮演着不可或缺的角色。作为物流运输行业载体，商用车 的维修性和驾驶室舒适性受驾驶室液压翻转系统影响。为了实现更低的制造和设计成本，一 种新的驾驶室液压系统和液压集成阀结构被设计出来。新的驾驶室液压系统的随动功能由液 压阀承担，且液压阀的参数可以通过弹簧调整。文中用 catia 软件对液压阀进行结构建模，用 matlab 软件对举升过程进行建模仿真。液压阀的可调弹簧结构参数受举升力影响。分析结果 表明，新型驾驶室液压系统可以满足驾驶室的各种工况需求，且新型液压阀所实现的功能与 液压系统原理图一致。仿真计算结果表明，举升过程的最大举升力为 19 112 N，与实验结果 基本一致。

关键词: 商用车驾驶室；液压系统；最大举升力