The trailer should also "raise" the trailer adjustment method precautions

The bad adjustment of the trailer will directly affect the performance of the trailer, to a certain extent, it will affect the fuel consumption of the trailer tire wear, etc., and serious liters will even lead to accidents. This article explains the relevant knowledge of the trailer adjustment in detail for the reference of the owners.

● Check all parts to ensure that the trailer is in good condition

In terms of trailer adjustment, there is nothing too complicated in terms of trailer structure. Mainly includes pulling arm, lifting lug, traction pin, balance beam, steel plate and other components, although a variety of adjustment methods, but its most fundamental principle in the final analysis is isosceles triangle. Good chassis condition, coupled with the standard positioning size, all problems of the trailer can be basically solved. Let's start with the parts of the trailer site:

Arm sleeve: tire wear first look at the lock arm bolt replacement arm sleeve

The main reason for the failure of the pull arm is the quality of the pull arm and the fastening of its locking bolt. The tractive force of the trailer axle is mainly pulled by the pull arm, so the failure of the pull arm affects the safety of the vehicle.

Arm sleeve, is an elastic element, its main properties are cushioning, and wear resistance. Some pull-arm sleeves have good cushioning and poor wear resistance, or high damage rate and poor cushioning force with good wear resistance, which requires different types of pull-arm sleeves with different performance for different vehicles and different transportation environments. The wear or damage of the pull arm sleeve is the main cause of tire wear in the trailer, so the pull arm sleeve should be replaced first when adjusting the trailer.

Balance beam: Irregular shell wear of the tire Check the balance beam

The main function of the balance beam is to balance the bearing capacity between the axes. The most important influence on vehicle driving is the balance between the steel plate and the balance beam, and the elasticity of the steel plate (which will cause irregular shell wear of the tire).

Leaf spring: The steel plate is broken or the strength is reduced

The leaf spring is the main part of the weight bearing of the trailer, and its main function is the buffering effect. When the single stack steel plate breaks or the strength decreases, the axle tire will wear too fast. Therefore, the inspection trailer axle of the balance beam and the steel plate is also the focus of our adjustment.

Traction pin: Traction pin left and right deviation is too large trailer will throw tail

The traction pin is a link mechanism between the tractor and the trailer, which carries the tractive force of the trailer and is the tractive force point of the trailer. Because of its welding deformation in the welding process, the deviation of its left and right is also what we should pay attention to in the adjustment process. When the left and right deviation occurs, the vehicle will throw its tail during the driving process. (Generally, the factory deviation is within 5mm, which does not affect the tail of the vehicle) Under normal circumstances, which side the trailer will swing the tail to which side the traction pin is biased.

● Five points to note in the trailer adjustment process

Good chassis status is the basis of positioning, and the main adjustment of trailer positioning is the status of the various components of the trailer. The real measurement is only to adjust the trailer under the trailer adjustment method to "raise" the balance of matters. With a good chassis condition, how can we adjust the trailer faster and also "maintain" the balance of the trailer adjustment method? What problems should we pay attention to in the adjustment process?

A smooth and smooth site is the premise of tuning the trailer

Smooth and smooth working area can improve the accuracy and speed of adjustment. The site influence is mainly from the left-right deviation. When the left-right deviation is greater than 2CM, it will cause a 1cm deviation of the measured data. When working on potholed and uneven road surface, it is normal to cause measurement deviation due to the uneven level of each wheel position, so in the flow operation, the influence of the ground will have a certain measurement deviation.

Good prediction and customer communication lay a solid foundation

Anticipation is also very important when tuning a trailer. It mainly refers to the prediction of the deviation distance between the axles. The position relationship between the axles can be predicted and tested by observing the balance of the tires on both sides, the left and right deviation of the steel plate in the lifting ear, and the left and right position deviation of the tire and the lifting ear. It can judge the distance deviation of the vehicle wheelbase above 5mm and predict the direction of the vehicle's tail shake. This provides a solid foundation for adjusting operations and communicating with customers.

Trailer arm adjustment should pay attention to the three major matters

1. When adjusting the pull arm, because the pull arm is mainly used for pulling force, in order to ensure the change trend of its fixed pull rod, it should be extended and then shortened to the standard state when we adjust. When adjusting the pull arm, attention should also be paid to the change of the gap around it to ensure that the pull arm is in the pull state.

2. When adjusting the wheelbase with a relatively large deviation, the change of the pull arm for one circle is about 4mm, the change of the wheel edge distance is about 1cm, and the adjustment ratio is about 1:4. When the live drawarm side is extended or shortened by 4mm, the fixed drawarm side will be shortened or extended by 1mm, which is a 4:1 ratio.

3, when adjusting the wheelbase with a large deviation, we should always observe the position of the steel plate to avoid the steel plate sticking to one side, affecting the adjustment effect. (You can use a sledgehammer to adjust the steel plate) When adjusting the pull arm, we should pay special attention to when it becomes more and more immovable, so that the repair rate of the adjusted car is larger.

Three reasons of trailer tail throwing and corresponding solutions

The trailer tail dump is caused by several aspects, such as the main car running skew (mainly the drive wheel is not correct, resulting in the thrust Angle), the traction pin is not correct (deviation of more than 5mm), and the trailer axle overall deviation of the three axes (positioning reasons) can be judged by measurement or road test.

Under normal circumstances, the transaxle is not correct observation trailer will swing the tail in the direction of the transaxle in front. The traction pin will not swing the tail in the direction of the traction pin. The whole three-axis thing is not right over there and it's swinging its tail over there. We can solve the problem according to its fault. We can also solve this problem by slightly adjusting the overall offset of the three hanging axles.

The above is the summary of a trailer maintenance personnel on the trailer tuning, although our users have few opportunities to adjust and repair the trailer themselves, but the above trailer tuning knowledge for our usual check and maintenance of the trailer, the grasp of the status of the trailer will be helpful. Of course, if there are mistakes or inappropriate places in the above statement, please correct and discuss.