Concrete mixer is mainly used in engineering construction, and its working environment is generally poor, such as heavy dust, uneven road, etc., in such a bad environment, the impact on the mixer is very big, such as the tires of the mixer, the uneven road will speed up the wear of the tire, in the four-wheel positioning detection of the mixer, we often meet the driver friend It is required to solve the problem of tire eccentric wear. There are also vehicles in the positioning detection found that the toe in value is too large, after inspection, the tire has been eccentric wear. As far as vehicles are concerned, the eccentric wear of most commercial concrete vehicles is concentrated on the front wheels, and the eccentric wear of the inside of the tires caused by the excessive toe in value of the concrete mixer is common. What is the matter? Now for the concrete mixer tire eccentric wear causes and solutions, mixer manufacturer to do a detailed explanation.

混凝土搅拌车工作中轮胎偏磨的原因及方法

Causes and solutions of tire eccentric wear in concrete mixer

一、混凝土搅拌车工作中轮胎偏磨的原因及方法

1、 Causes and solutions of tire eccentric wear in concrete mixer

在搅拌车四轮定位检测中，经常会遇到驾驶员朋友前来要求轮胎偏磨的问题。还有的车辆在定位检测中发现前束数值超差太大，经检查轮胎已经偏磨。就车辆而言，大多数的商砼车轮胎偏磨都集中在前轮，混凝土搅拌车并以负值的前束值超差造成轮胎内侧偏磨多见。

In the four-wheel alignment detection of mixer truck, it is often encountered that the driver friends come to ask for solving the problem of tire eccentric wear. There are also vehicles in the positioning detection found that the toe in value is too large, after inspection, the tire has been eccentric wear. As far as vehicles are concerned, most of the commercial concrete vehicle tire eccentric wear is concentrated in the front wheel, and the concrete mixer with negative toe in value causes the tire inner side eccentric wear.

对于商混车轮胎偏磨，有些人认为是混凝土搅拌车车轮的外倾角超差造成的，但其实轮胎的偏磨在很大程度上是因前束值的超差造成的。根据从事四轮定位工作多年的技术人员总结的经验和大量的定位检测数据分析认为：正确的前束值完全可以有效地避免轮胎的偏磨。

For the tire eccentric wear of commercial vehicles, some people think that it is caused by the out of tolerance camber angle of concrete mixer wheels, but in fact, the eccentric wear of tires is largely caused by the out of tolerance of toe in value. According to the experience of technicians who have been engaged in four-wheel alignment work for many years and a large number of positioning test data, it is considered that correct toe in value can effectively avoid tire eccentric wear.

转向轮总转角的超差、车轮外倾角和主销内倾角的不正确导致轮胎偏磨的现象是极少见的。搅拌车生产商在实际行驶中，随车吊绝大多数时间是直线行驶。而急转弯、倒车和调头时的总转角不会长时间使用，所以由它引发的偏磨也甚微。

It is very rare that tire eccentric wear is caused by out of tolerance of total steering wheel angle, wheel camber angle and kingpin inclination angle. In the actual driving of the mixer manufacturer, the truck crane runs in a straight line most of the time. The total angle of sharp turning, reversing and turning will not be used for a long time, so the eccentric wear caused by it is very small.

这类轮胎与地面接触时的柔韧性和随意变形的特性在很大程度上抵消了因车轮外倾角可能造成的轮胎偏磨，即便是高压轮胎超差的车轮外倾角对轮胎的磨损影响也不大。比如我们经常可以看到公路上有的空载卡车为了减少车轮与地面的摩擦、降低滚动阻力而专门设计了可变后轮外倾角，且外倾角变化之大几乎达到10°左右。重汽混凝土搅拌车根据观察，这种车并未出现想象中的轮胎偏磨加重现象。

The flexibility and random deformation characteristics of this kind of tire in contact with the ground largely offset the tire eccentric wear caused by wheel camber angle, even if the high pressure tire out of tolerance camber angle has little effect on tire wear. For example, we can often see that some empty trucks on the road have specially designed the variable rear wheel camber angle in order to reduce the friction between the wheel and the ground and reduce the rolling resistance, and the camber angle changes greatly to about 10 degrees. According to the observation, this truck did not appear the imagined tire eccentric wear aggravation phenomenon.

从设计上考虑，为了约束随车吊在直线行驶中车轮外倾角造成的偏拉，对随车吊设定了一定的前束值。但是由于随车吊行驶的各种不同路面情况和颠簸、冲撞、机件磨损等因素的存在，即使是再坚固的随车吊，它原有的定位角度都要不同程度地因上述原因逐渐改变原前束值。有的数值一有变化在驾驶中马上就能被感觉到，比如主销后倾角、车轮外倾角、比较严重的后轮前束值的改变。

Considering from the design, a certain toe in value is set for the truck mounted crane in order to restrain the deflection caused by the wheel camber angle in the straight running. However, due to the existence of various road conditions, bumps, bumps, wear and tear of parts, the original positioning angle of the truck mounted crane will gradually change the original toe in value due to the above reasons. Some values can be felt immediately when driving, such as kingpin caster angle, wheel camber angle and serious rear wheel toe in values.