How much do you know about the basic knowledge of construction machinery tires

First of all, let’s look at some of the following terms for construction machinery tires.

(1) Radial tire: A pneumatic tire in which the carcass ply cord and the center line of the crown are arranged at an angle of 90° or close to 90° and the carcass is tightened with a belt.
(2) Bias tires: Pneumatic tires in which the adjacent cords of the carcass ply and buffer layer intersect and are arranged at an angle of less than 90″ with the centerline of the crown.
(3) Load symbol: Under the specified conditions of use, the strength marking symbol of the heavy load that the construction machinery radial tire can withstand, usually consists of 1.2 or 3 ★”
(“★Light disc level, “heavy is level, “** overweight is level).
(4) Creeping: This is the movement of the equipment at a very low speed (no more than 60m in 30 minutes). In peristaltic motion, the load on the wheel is very large, and the driving of the equipment must be considered
Type of pavement.
(5) Narrow base tires (normal section tires): Engineering tires with a tire section aspect ratio of about 0.95.
(6) Wide-based tires: engineering tires with a tire section aspect ratio of about 0.80.
(7) Low-profile tires: engineering tires with a tire cross-sectional aspect ratio of about 0 65 (65 series) or 0.70 (70 series).
(8) Measuring pattern depth: the vertical distance from the bottom low point of the pattern to the tread at the 14th (measurement point) width of the tire running surface.
(9) Design pattern depth: According to the standard, the pattern depth reached during tire design.
(10) Whole vehicle curb quality: refers to the quality of a complete vehicle equipped with a body, all electrical equipment and auxiliary equipment required for the normal running of the vehicle.
(11) Vehicle equipment quality: refers to the total vehicle quality and the quality of the following parts: coolant fuel (not less than 90% of the entire fuel tank capacity), spare tire, fire extinguisher
Standard spare parts, on-board tools.
(12) Total mass: the sum of the quality of the complete vehicle equipment and the mass of the large load.
(13) Large load mass: refers to the rated value of the cargo loaded on the vehicle.
(14) Free radius: the distance from the center of the wheel axle of the unloaded rotating tire to the center of the tread.
(15) Dynamic load radius: The vertical distance from the center of the wheel axle to the support plane when the tire is running under load and the inclination angle is at a minimum.
(16) NHS represents the letter mark for off-road tires.
(17) TG: A letter mark for off-road type driven grader tires.
(18) Tier level: The specific strength mark of the heavy load that the tire can withstand under the specified conditions of use. It does not represent the actual number of tire plies.
(19) Small twin tire spacing: the small distance between the center lines of the two tires’ tread when the twin tires are installed in parallel.
(20) Wear: The tire tread pattern is worn out due to sliding friction in the ground contact surface, material fatigue, tearing acid, etc. when the tire is running.
(21) Tire grinding circle: the phenomenon of wear of the tire circle contacting the rim.
(22) Subsidence: The reduction in section height of a static tire under vertical load.
(23) Measuring rims: The rims specified for tires of various specifications in order to determine the size of new tires. This wheel set is also a wheel that can be matched with the tire and can give full play to the performance of the tire.
(24) Assembly line: The single-ring or multi-ring rubber edge molded at the junction of the sidewall and the tire circle to indicate the correct assembly of the tire on the rim.
(25) Anti-scratch line: a ring-shaped convex rubber edge molded on the sidewall to protect the sidewall from scratching.
(26) Aspect ratio: The ratio of the tire section height to the section width.

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