关于铰接车辆铰接机构的研究
发布时间：2018-08-11 10:42
【摘要】：随着世界经济发展,能源开发、矿山开采、农林畜牧以及城市建设的大量推进,工程车辆也随之备受重视。由于目前对国内铰接转向工程车辆的研究、设计和制造落后于国外,因此对铰接式车辆的相关特性的深入研究具有重要的实际意义,为此许多新型铰接机构的铰接车辆不断涌现。由于铰接机构具有转弯半径小,适应能力强,整体舒适性好,轮胎受力均匀等显著特点,所以被公认为是目前工程车辆的发展趋势。三铰型压路机转动中心在铰接机构中间,转弯时通过平衡连杆调整,减小了一半的推角,能够实现在安全区域作业且操舵性能良好;当三铰型压路机的铰接点处于前后轮轴线的中心位置时,前后轮的转向半径相等且具有最小值,车辆转向或直行的稳定性高。运用三维工程软件对三铰型压路机和普通销轴铰接式压路机,在行驶速度不变而转向角度变化的工况进行运动仿真对比,仿真曲线显示三铰型压路机行驶平稳;在转向角度不变行驶速度变化的情况下,仿真曲线显示三铰型压路机两侧轮胎受力均匀,受力波动较小,不易倾翻;在单轮越障工况下,三铰型压路机驾驶室不受压轮越障影响,具有较好的舒适性和稳定性,达到了预期目标。针对如下三种工况,对三铰型压路机的铰接机构进行有限元分析:在原地转向工况下,通过三维工程软件分析得出后支架所受力矩曲线;将力矩施加至两侧油缸铰座处,对后支架进行强度校核,并对其进行优化。在爬坡工况下,通过计算得出在爬坡角度为55%时最大牵引力,将牵引力施加至前支架进行有限元分析;通过对前支架后处理,分别对平衡连杆和后支架进行有限元分析。在单轮越障工况下,通过三维工程软件分析,测得三个球铰所受反作用力,并将反作用力分别施加至平衡连杆、前支架和后支架,对其进行有限元分析,结果显示符合设计要求。本文结合当前铰接式压路机的实际情况,全方面比较分析之后,设计出符合未来发展需求的三铰型压路机;对铰接式压路机的转向运动学进行了数学建模,并对转向行驶时压路机轮胎受力状态进行运动学仿真,最后通过软件对三铰点铰接机构进行了强度校核,为铰接式车辆铰接机构的研究提供了理论基础。
[Abstract]:With the development of world economy, energy exploitation, mining, agriculture, forestry and animal husbandry, as well as urban construction, engineering vehicles have been attached great importance. At present, the research on articulated steering engineering vehicles in China lags behind in design and manufacture, so it is of great practical significance to deeply study the related characteristics of articulated vehicles. For this reason, many new type hinge mechanism hinges the vehicle to emerge unceasingly. Because the hinge mechanism has the characteristics of small turning radius, strong adaptability, good overall comfort, uniform tire force and so on, it is recognized as the development trend of engineering vehicles at present. The rotation center of the three-hinged roller is in the middle of the hinged mechanism, and by adjusting the balance connecting rod when turning, the push angle is reduced by half, which can be operated in the safe area and has good steering performance. When the hinge point of the three-hinged roller is in the center position of the axis of the front and rear wheels, the steering radius of the front and rear wheels is equal and the minimum value is obtained. Three dimensional engineering software is used to compare the motion of the three-hinged roller with that of the common pin shaft roller under the condition of constant driving speed and changing steering angle. The simulation curve shows that the three-hinged roller is running smoothly. Under the condition that the steering angle is constant, the simulation curve shows that the tire on both sides of the three-hinged roller is uniform, the force fluctuation is small, and it is not easy to overturn. The cab of the three-hinged roller is not affected by the pressure wheel, and has good comfort and stability, and achieves the expected goal. In view of the following three working conditions, finite element analysis is carried out on the hinge mechanism of the three-hinged roller: under the condition of in-situ steering, the torque curve of the rear support is obtained by three-dimensional engineering software, and the torque is applied to the hinge seat of the two sides of the cylinder. The strength of the rear support was checked and optimized. Under the condition of slope climbing, the maximum traction force is obtained when the climbing angle is 55. The traction force is applied to the front bracket for finite element analysis. The balance connecting rod and the rear support are analyzed by finite element method respectively. Under the condition of single wheel surmounting obstacle, the reaction force of the three ball hinges is measured by three dimensional engineering software, and the reaction force is applied to the balance link, the front bracket and the rear support respectively, and the finite element analysis is carried out on them. The results show that it meets the design requirements. In this paper, according to the actual situation of the current articulated roller, after comparing and analyzing all aspects, a three-hinge roller is designed to meet the needs of future development, and the steering kinematics of the hinged roller is modeled. Finally, the strength of the three-hinge mechanism is checked by software, which provides a theoretical basis for the research of articulated mechanism of articulated vehicle.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U415.521
本文编号：2176768
[Abstract]:With the development of world economy, energy exploitation, mining, agriculture, forestry and animal husbandry, as well as urban construction, engineering vehicles have been attached great importance. At present, the research on articulated steering engineering vehicles in China lags behind in design and manufacture, so it is of great practical significance to deeply study the related characteristics of articulated vehicles. For this reason, many new type hinge mechanism hinges the vehicle to emerge unceasingly. Because the hinge mechanism has the characteristics of small turning radius, strong adaptability, good overall comfort, uniform tire force and so on, it is recognized as the development trend of engineering vehicles at present. The rotation center of the three-hinged roller is in the middle of the hinged mechanism, and by adjusting the balance connecting rod when turning, the push angle is reduced by half, which can be operated in the safe area and has good steering performance. When the hinge point of the three-hinged roller is in the center position of the axis of the front and rear wheels, the steering radius of the front and rear wheels is equal and the minimum value is obtained. Three dimensional engineering software is used to compare the motion of the three-hinged roller with that of the common pin shaft roller under the condition of constant driving speed and changing steering angle. The simulation curve shows that the three-hinged roller is running smoothly. Under the condition that the steering angle is constant, the simulation curve shows that the tire on both sides of the three-hinged roller is uniform, the force fluctuation is small, and it is not easy to overturn. The cab of the three-hinged roller is not affected by the pressure wheel, and has good comfort and stability, and achieves the expected goal. In view of the following three working conditions, finite element analysis is carried out on the hinge mechanism of the three-hinged roller: under the condition of in-situ steering, the torque curve of the rear support is obtained by three-dimensional engineering software, and the torque is applied to the hinge seat of the two sides of the cylinder. The strength of the rear support was checked and optimized. Under the condition of slope climbing, the maximum traction force is obtained when the climbing angle is 55. The traction force is applied to the front bracket for finite element analysis. The balance connecting rod and the rear support are analyzed by finite element method respectively. Under the condition of single wheel surmounting obstacle, the reaction force of the three ball hinges is measured by three dimensional engineering software, and the reaction force is applied to the balance link, the front bracket and the rear support respectively, and the finite element analysis is carried out on them. The results show that it meets the design requirements. In this paper, according to the actual situation of the current articulated roller, after comparing and analyzing all aspects, a three-hinge roller is designed to meet the needs of future development, and the steering kinematics of the hinged roller is modeled. Finally, the strength of the three-hinge mechanism is checked by software, which provides a theoretical basis for the research of articulated mechanism of articulated vehicle.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U415.521
【参考文献】
相关期刊论文 前2条
1 檀中强;赵明岩;王世娇;;空间机构的运动精度及可靠性分析[J];科技通报;2014年07期
2 李滟;;自行式铲运机车架有限元结构强度分析[J];矿业装备;2013年06期
，本文编号：2176768
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2176768.html
