Manually adjusting the arm means that after the vehicle has traveled a certain distance, there will be brake wear and an increase in brake clearance, which requires manual adjustment to ensure brake clearance. Due to manual adjustment, there may be delays and randomness in the adjustment, which may result in inconsistent clearance between the brakes, prolonged braking response time, wheel deviation, vehicle drifting, and even brake failure. To solve the above problems, it is necessary to regularly check and manually adjust the brake clearance of the brake, and keep it constant and consistent. Due to its low price, manual adjustment arms have a large market share in the heavy-duty truck market. However, manual adjustment of the arm cannot meet the continuous, efficient, and consistent braking effect that large tonnage heavy-duty vehicles should have, which can easily lead to braking lag, biased braking, and even cause friction plates to loosen and fall off, posing significant safety hazards to the running vehicles. So automatic arm adjustment will become a new trend. The gap automatic adjustment arm has the following characteristics:
(1) Ensure that each wheel brake has a constant and consistent braking clearance, making the braking of the entire vehicle more sensitive, balanced, and effective, shortening the braking distance. Even if the thickness and wear degree of each wheel brake shoe are different, the optimal braking efficiency can still be guaranteed. This is particularly important when the axle comes from different manufacturers, the brake and friction pair materials are different. Manual periodic adjustment will result in different brake clearances due to different wear between different brakes, leading to uneven distribution of braking force.
(2) Shorten the braking response time and reduce the consumption of compressed air. Due to the elimination of excess clearance, the brake chamber can implement braking in the shortest stroke and optimal working area, thereby achieving the best braking efficiency, shortest braking response time, and minimum air consumption.
(3) Due to the adjustment mechanism being sealed inside the housing, it is well protected from moisture, corrosion, and collision.
(4) Easy to install.
(5) No longer requires manual adjustment of the brake adjustment arm, reducing the number of repairs and extending the maintenance interval of the vehicle, thereby increasing economic benefits.
(6) The brake balance effect brought by automatic adjustment of brake clearance increases with the increase of the number of axles.