The main technical parameters of the rear axle include rear axle load, wheel distance, bridge shell, main reducer and main deceleration ratio, the center of the plate spring seat, maximum output torque, etc.; The brake torque is adapted with the vehicle load and the conditions of the working conditions. The allowable output torque to the driving bridge meets the requirements of the vehicle matching. The maximum output torque of the rear axle is based on the engine's maximum torque and the lowest transmission speed resistance ratio and the main transmission comparison. There are many options that can take into account the power and economy of the vehicle according to different engines and gearbox combinations, and the driving bridge can adapt to the requirements of installing a variety of slow speed device. In addition, the structure of the plate spring seat and the welding of welding, the welding position of the rear axle shell assembly shock absorber bracket, the specifications of the rear bridge rear brake brake gas, active gear cushion, wheel bolt and distributed circular diameter size , Incise or select ABS, automatic adjustment of arm, grinding or fine grinding teeth.
Maintenance of bridge shells and half -axis sleeves. The bridge shell is the basic part of the driving bridge. Its role is to support components such as the main reducer, differential device, and semi -axis. The relative position of the left and right drive wheels is fixed. Essence The bridge shell is divided into an overall bridge shell and a segmented bridge shell according to the structure. The overall bridge shell is cast with a ball and ink cast iron, and the two ends are pressed into seamless steel controlled half -axis sleeves. The overall cast -type bridge shell has a large stiffness and high strength, and is suitable for medium and heavy cars. Steel plate stamping welding bridge shells have the characteristics of small quality, simple process, low cost, and good impact resistance. The same axis of the bearing hole of the semi -axis sleeve of the bridge shell is not greater than 0.10mm; or the bending deformation of the bridge shell was detected with a standard semi -axis, and the difference between the center of the two -half axis is not more than 075mm. The transformation of the bridge shell exceeds the specified value and should be corrected. Bending deformation within 2mm can be corrected by cold pressure; if the deformation is large, heated correction can be used, but the temperature should be below 700C, preventing the fierceness of the bridge shell of the bridge shell due to the high temperature of the metal tissue. Replacement, slight cracks can be welded. The positioning of the positioning of the center positioning of the steel plate spring seat on the bridge shell must not exceed 1m, which exceeds the specified value. It can be re -processed after pile welding. The bulging hole of the brake bottom plate is worn by the bridge shell, which can be repaired by repairing dimensions or re -drilling. When drilling, the brake bottom plate should be fixed to the drill. The inner half -axis sleeve in the bridge shell is worn by holes, and the inheritance holes can be used to repair the size, and the half -axis sleeve with the corresponding repair size can be replaced. When the axle and neck wear of the bridge shell is more than 0.15mm, it can be repaired by inlay.
Half -axis maintenance. The common damage of the semi -axis includes bending, twisting, broken, bonding, etc. The semi -axis should be performed, and a magnetic detection machine or a perching method should be checked. If there is a crack, it should be replaced. The radial round beating in the middle of the semi -axis should not be greater than 1.5m; the radial round beating of the cylindrical surface of the flower bond is not greater than 0.25mm; The radial round beating overrun should be corrected by the cold pressure;
Repair of half -axis sleeve. When the axle and neck wear of the semi -axis sleeve is more than the specified value, it should be replaced or plated; when the end thread damage exceeds 2 teeth or severe wear, the thread can be re -processed after welding. Explore the tube to detect the tube. If there is a crack, it should be replaced. Check the deformation of the semi -axis sleeve, and requires that the radial orientation of the two axis neck in the middle of the half -axis sleeve must not be greater than 0.05m. When exceeding the regulations, cold pressure correction can be used. When replacing the half -axis sleeve, first remove the positioning screw, pull the old sleeve out with a half -axis sleeve stretching machine, and then press it into the new tube. When pressing into the new sleeve, you should pay attention to the length of the exposed part of the measurement of the measurement of the sleeve, and then use an electric drill to drill the positioning hole on the sleeve through the positioning hole on the bridge shell, and finally fix it with the positioning screw.
The main points of attention when replacing parts of the BUS need to decompose and assemble the driving bridge: Decomposition of the driving bridge assembly: decompose the parts of each ministry, pay attention to the relative position of the component, and make a mark, such as the left and right bearing cover cover. Allow swap, etc. When disassembling the half -axis, you can use two bolts into the thread holes on the half -axis. The half -axis sleeve is matched with the bridge shell. If there is no crack or damage, do not easily press the semi -axis sleeve to avoid destroying the assembly of the original coordination of the driving bridge assembly: when assembly, bearings, gears and each each The neck and surface should be cleaned and coated with gear oil to lubricate, and then loaded according to the original position when disassembling. When assembling differentials, the across -shaft neck and the inner pores of the planetary gear must be applied to the surface of the gear oil. Lubricate, avoid dry friction during walking. When replacing differential gears, it should be noted that the gear processed by rounding method and the gear processed by planing method cannot be mixed. When replacing a single gear, it is necessary to identify it carefully. Identification method: Observe the top width of the gear, the gear tooth top of the gear tooth is wide and narrow; the gear pepper processing of the circular method is exactly the opposite, that is, the large end is narrow and the small end is wide. After the driving bridge is resumed, the new gear oil must be injected according to the standard, and the temperature of the reducer assembly and the wheel reducer should be checked in time. If there is an overheating phenomenon, the inspection should be removed and the adjustment should be adjusted.
