混凝土自上料搅拌车调整制动间隙的关键
制动系统故障导致的交通事故很多，从爆胎到车辆起火，不一而足。因此，搅拌车驾驶员必须经常检查制动系统，特别是制动间隙和制动蹄的厚度。下面就来讲讲相关内容吧。
There are many traffic accidents caused by brake system failure, ranging from tire blowout to vehicle fire. Therefore, the mixer driver must always check the brake system, especially the brake clearance and brake shoe thickness. Let's talk about the relevant content.
说一下它的工作原理：压缩空气进入制动缸，由于气压的作用，制动缸的推杆被推出，带动调节臂运动，调节臂驱动凸轮轴转动，凸轮轴另一端的S凸轮推动制动器，动靴向外运动并接触制动轮毂产生制动力，车辆可以减速停止。车辆行驶一定时间后，刹车蹄会逐渐变薄，制动间隙会越来越大。即使碰到也没有力气，也没有刹车。
Let's talk about its working principle: compressed air enters the brake cylinder. Due to the effect of air pressure, the push rod of the brake cylinder is pushed out to drive the adjusting arm to move. The adjusting arm drives the camshaft to rotate. The s cam at the other end of the camshaft pushes the brake. The moving shoe moves outward and contacts the brake hub to generate braking force. The vehicle can decelerate and stop. After the vehicle has been driven for a certain period of time, the brake shoes will gradually become thinner and the brake clearance will become larger and larger. There is no strength and no braking even if you encounter it.
调整制动间隙的关键部件是调整臂。调节臂分为自动调节臂和手动调节臂。手动调节臂调节方法：通过锁紧装置中的调节螺母调节制动间隙，打开防尘罩上的观察孔，观察调整螺母的转动，使制动间隙变小，无间隙时停止并明显变大，然后反方向旋转180度，调整好。自动调节臂一般不需要手动调节。但是，自动调节臂的质量一般不如手动调节臂。
The key component to adjust the brake clearance is the adjusting arm. The adjusting arm is divided into automatic adjusting arm and manual adjusting arm. Adjustment method of manual adjusting arm: adjust the brake clearance through the adjusting nut in the locking device, open the observation hole on the dust cover, observe the rotation of the adjusting nut, make the brake clearance smaller, stop and obviously increase when there is no clearance, and then rotate 180 degrees in the opposite direction for adjustment. The automatic adjusting arm generally does not need manual adjustment. However, the quality of the automatic adjusting arm is generally inferior to that of the manual adjusting arm.
当制动蹄摩擦片磨损，制动气室推杆行程超过40mm时，为减小制动蹄摩擦片与搅拌车制动鼓之间的间隙，需要进行局部调整。调整时，面向调整臂座杆，顺时针拧紧螺丝（制动蹄摩擦片与制动鼓之间的间隙减小），逆时针拧松。扭动制动气室推杆连接叉改变推杆长度的方法是错误的。调整后轮弹簧制动器时应注意以下几点。
When the brake shoe friction plate is worn and the stroke of the brake air chamber push rod exceeds 40mm, local adjustment is required to reduce the gap between the brake shoe friction plate and the brake drum of the mixer truck. During adjustment, face the adjusting arm seat rod, tighten the screw clockwise (the gap between the brake shoe friction plate and the brake drum is reduced), and loosen it counterclockwise. It is wrong to twist the connecting fork of the brake chamber push rod to change the length of the push rod. Pay attention to the following points when adjusting the rear wheel spring brake.
严禁通过扭动制动气室推杆连接叉来改变推杆行程。
It is forbidden to change the push rod stroke by twisting the connecting fork of the push rod of the brake air chamber.
调整后刹车时，一定要把车停在平坦的地方，并保证储气筒的气压在700kPa以上。
When adjusting the rear brake, be sure to park the car in a flat place and ensure that the air pressure in the air reservoir is above 700KPA.
前后轮用三角块塞好，接触驻车制动器后方可调整后制动间隙。
The front and rear wheels shall be plugged with triangle blocks, and the rear brake clearance can be adjusted after contacting the parking brake.
每行驶1500km应给制动凸轮和支架滑套加注润滑脂，但每次注油量不宜过多，以免润滑脂污染摩擦片工作面。更换制动蹄摩擦片后，由于制动底板的拆除，制动蹄轴转动，制动凸轮的位置发生变化，从而破坏了制动蹄摩擦片与制动鼓的正确接触状态。因此，需要按以下顺序进行调整。
The brake cam and support sliding sleeve shall be filled with grease every 1500km, but the amount of oil shall not be too much each time to avoid the grease polluting the working surface of the friction plate. After replacing the brake shoe friction plate, due to the removal of the brake base plate, the brake shoe shaft rotates, and the position of the brake cam changes, thus destroying the correct contact state between the brake shoe friction plate and the brake drum. Therefore, it needs to be adjusted in the following order.
拆下混凝土自上料搅拌车制动鼓上检查孔的盖板，松开制动蹄支撑销的固定螺母和气室支架紧固螺栓的螺母。
Remove the cover plate of the inspection hole on the brake drum of the concrete mixing truck, and loosen the fixing nut of the brake shoe support pin and the nut of the fastening bolt of the air chamber support.
转动鞋支撑销，使两个销端上的标记朝内。
Turn the shoe support pin so that the marks on both pin ends face inward.
通过反复扭动制动蹄轴和调节臂蜗杆轴，使制动蹄摩擦片和制动鼓完全贴合，然后拧紧制动蹄轴的调节螺母和锁紧螺母（此时，确保制动蹄轴和气室支架的位置保持不变）。
Twist the brake shoe shaft and adjusting arm worm shaft repeatedly to make the brake shoe friction plate fully fit the brake drum, and then tighten the adjusting nut and lock nut of the brake shoe shaft (at this time, ensure that the positions of the brake shoe shaft and the air chamber support remain unchanged).
混凝土自上料搅拌车厂家提醒，将调节臂的蜗杆轴松开1/2-2/3圈，制动鼓应能自由转动，不与制动蹄的摩擦片或其他部位发生摩擦。
The manufacturer of concrete batching truck reminds that loosen the worm shaft of the adjusting arm for 1/2-2/3 turn, and the brake drum shall be able to rotate freely without friction with the friction plate of the brake shoe or other parts.
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