Walk the motor output shaft fission structure

2018 - walking motor output shaft fission structure 11 - 22 Jiang Hu abstract: through the excavator actual testing and servicing the summary of the feedback, found that the motor output shaft and skeleton oil seal sealing combining site especially easy to wear. After the improvement, the motor output shaft to make fission structure, i. e. set up between the motor output shaft and the skeleton oil seal sleeves, when wear only need to replace collar, and replace the homework just remove the planet reducer parts, without having to remove the hydraulic motor parts, the whole process is simple, convenient, greatly shorten the maintenance time, increase the maintenance efficiency. Key words: walking motor; Shaft sleeve. The motor output shaft introduction crawler excavator is extremely widely used construction machinery, its driven by hydraulic motor and the planetary gear retarding mechanism of walking motor assembly. Through the excavators of the actual testing and maintenance experience, found that the motor output shaft and sealing combining parts of the skeleton oil seal especially easy to wear. When the wear reaches a certain degree, hydraulic motor and reducer part will happen within the oil streaming, because the machine of decelerate of planet of internal oil dirt and impurities, streaming of oil pollution to the piston motor, cause damage to the hydraulic motor. And use of the crawler excavator on the market at present, its hydraulic motor output shaft to the monomer structure, when wear occurs, must be replaced to the output shaft. Replace worn in a body structure of motor output shaft and skeleton oil seal, you first need to dismantle the planet reducer parts, then open hydraulic motor components, to remove the motor output shaft. And in the process of disassembly, must ensure that the work environment is absolutely clean, prevent the piston motor secondary pollution. The whole process is cumbersome, takes work, work efficiency is low. In addition, the main working part due to the motor output shaft is splined joint, its high strength, wear less, the injury in the motor output shaft and sealing combining parts of the skeleton oil seal, such as replacing the motor output shaft, is wasteful. And it is in the wear of sealing parts chrome-plated, then grinding, polishing, but doing so maintenance time is relatively long, is not conducive to the actual production needs maintenance. 1 output shaft fission structure design in order to solve the technical problems, will the crawler excavator walking motor output shaft sealing shaft end make fission structure, as shown in figure 2, i. e. set up between the motor output shaft and the skeleton oil seal shaft sleeve. Inside the collar end and the steps of the motor output shaft end face junction, equipped with rectangular sealing ring, prevent reducer cavity and hydraulic motor hydraulic oil streaming in the cavity. The right side of the skeleton oil seal with convex sets, on the left side of the mounting holes with the retaining ring, avoid the axial channeling, and facilitate the disassembly, installation. 2 motor output shaft fission structure change process as shown in figure 1, figure 2: when walking motor using a certain time, need to replace worn skeleton seal and shaft sleeve, first remove the reduction units after the end cover, and then in turn to take out the primary planet carrier, center of the wheel and the secondary center of the wheel and the planetary gear, shaft end part of the output shaft of the motor and skeleton seal is fully revealed. By Allen wrench to remove the first two set screws, use two set screw hole will wear the collar, and then remove the hole with a collar, and using the radial clearance, after remove the collar through the skeleton seal tooling down wear, and remove the rectangular sealing ring, at this point the disassembly process is complete, then check that the damaged situation. Replace skeleton seal and shaft sleeve, the first part will be the end of the motor output shaft with clean, install the rectangular sealing ring first, and then press gently into the skeleton seal to the desired location, then coated with lubricating oil of new bushing load, the end of the motor output shaft screw tight set screw, the collar of the right end face seal extrusion to end on the steps of the motor output shaft, then install the hole with a retaining ring, and then install portion of planetary reducer in turn. At this point the entire remove and replace the end of the installation process. 3 conclusion when worn the motor output shaft, the fission structure only need to replace worn skeleton seal and shaft sleeve, and do not need to change the output shaft of the motor, reduce the waste. Also do not need through the combining site chrome plated, then grinding, polishing, shorten the maintenance time. And in the process of change only need to disassemble the machine of decelerate of planet of part can be completed, and there's no need to dismantle the plunger motor key components, to prevent the secondary pollution in the disassembly process. Relatively old-fashioned monolithic structure, this structure makes separate maintenance process more simple, convenient, greatly shorten the maintenance time, increase the maintenance efficiency. References [ 1] Guo-jun Chen. Hydraulic excavator ( ) the design and calculation principle, structure, ( M] 。 Hubei: huazhong university of science and technology press, 2011. ( 2] Zhang Xincai. Imported excavator hydraulic system structure principle and maintenance [ M] 。 Liaoning: liaoning science and technology press, 2008. ( 3] Piece. Excavator practical maintenance manual [ M] 。 Beijing: mechanical industry publishing house, 2009.