The electric car single stage reducer improvement program

The electric car single stage reducer improvement program 2020 - 10 - Author: 29 to 1 research background in yunnan province electric vehicle with reducer input shaft joint surface seal leakage phenomenon is very common, and oil leakage has been difficult to be effectively solved. The reason mainly has: oil seal structure and itself quality problems, such as oil seal structure is unreasonable, shrink mouth is not smooth, uneven, with the imperfect circle. Drive shaft flange shaft and oil seal, because of the high-speed rotating drive shaft, the casing pressure is higher, oil seal is lax, lubricating oil is easy to leak out. Reducer input shaft seal oil leakage phenomenon, the serious influence the appearance of the product, caused by oil shortage caused by the gear wear and raise the cost of the use of consumers. Input shaft oil leakage phenomenon also exists in the bearing and oil seal. Electric cars with reducer input shaft joint surface seal leakage phenomenon is very common, and oil leakage has been difficult to be effectively solved, the question always restricts the development of electric vehicles. How to improve the electric car with reducer, solve the input shaft oil leakage is very urgent. 2 improvement ideas through to the problems are analyzed. With a large number of oil bearing running into the space between the body and bearing, long working hours after the formation of the high pressure oil, forced oil seal viscous deformation MAO, so that the dynamic seal clearance caused a big oil leakage phenomenon. Frame groove under combined with reducer design is unreasonable, the oil return not unblocked, led to the oil pressure increases, exacerbating the leak. Through the above analysis, summed up the solution to the oil seal leakage of oil solution: 1) Improved the structure of oil seal, oil seal compression wear resistance ability strengthen. 2) Change body structure, increase the one-way drain hole, make high pressure lubricating oil from the oil drain hole reflow working cavity, thus reduce oil pressure near the oil seal. 3 three improvement schemes. 1 the overall structure of reducer overall design as shown in figure 1, the specific implementation plan as shown in figure 2. Figure 1 single stage gear reducer structure tutu 2 collar seal structure diagram 3. 2 main technical specifications in this paper, the design of the electric car with a single stage reducer, its structure as shown in chart 4, shown in figure 5, including 1, 2, collar oil seal box body felt article 3, steel ring, 4, 5 oil return hole, gear oil, plate 6 first bearing cover, bearing 7, 8, 9 small bevel gears, 10 large conical gear, flat key 11, 12, felt ring gear shaft drive oil seal, 13, 14, input shaft bolt 15, 16 second bearing cover and the output gear shaft 17. Drive gear shaft 17, the lower end of the 12 sets the output gear shaft and the lower end of the drive gear shaft 12 has felt ring seal 13, effectively prevent the output gear shaft and bottom oil. Collar 2 on one side of the oil seal has the first bearing cover 8, 14, the first 8 installed on the bearing cap bolts effective for reinforcement. Gear shaft collar 2 on one side of the oil seal has input 15, input speed, variable speed. Drive gear shaft with the top of the 12 sets the second bearing cap (16, is advantageous for the reinforcement and remove the maintenance. Enclosure 1 has a collar on only one side of internal oil seal 2, collar oil seal side has felt in article 3, 2 and 3 article felt between a steel ring 4, and the lower end of the collar oil seal 2 is equipped with oil return hole 5, 5 with oil return hole enclosure 1 internal connection, and the oil return hole bottom 5 on one side of the connection plate 6 gear oil, collar 2 7 installed on only one side of bearing, oil seal and bearing 7 on one side of the small cone gear 9, 9 on one side of the small bevel gear connected with large conical gear rotation 10, and large conical gear with flat key 11 on only one side of 10, the lower end of the flat key 11 installation drive gear shaft 12, 10 large conical gear connected to the drive gear shaft 12. 3. Three specific improvement measures 1) To improve the oil seal structure. Collar oil seal of the felt a built-in rims, prevent article felt the heat shrinkage deformation, to prevent the occurrence of large oil seal of the seal clearance, effective to prevent the occurrence of the oil seal. 2) Set oil hole and gear oil plate back. When the amount of internal oil, the oil through the built-in back to guide the oil return oil hole and gear oil plate, effectively reduce the oil pressure seal. Avoid because of excessively high pressure seal leakage. Through the above two measures of improvement, make the input shaft of the reducer to effectively solve the oil leakage phenomenon, solved the practical problems in enterprise success. 4 innovation point 1) In this paper, the design improvement of oil seal structure, add oil return hole on the oil seal of the housing and baffle, can prevent gear reducer oil leakage caused by wear and tear. 2) In this paper, design of the modified gear reducer clever, simple structure, low cost. 3) Can be spread to the use of the bearing and oil seal. 5 key technology and main technical indicators are 1) In this paper, the design conical gear reducer through the collar seal two felt article 3 built-in steel 4, effectively prevent the article felt after 3 heat easily along the length direction of contraction deformation, it can prevent the collar seal oil seal 2 a big gap, effective to prevent the occurrence of the oil seal. 2) In collar oil seal at the same time two sets the built-in oil return hole 6, 5, and gear oil plate when the amount of internal oil, the oil through the built-in oil return hole 5 and gear oil plate 6 reflux, effectively reduce the seal oil pressure, avoid seal leakage caused by the pressure is too high, effective make the lubricating oil return, lower oil and oil leakage phenomenon. Source: 'file' 34, 2018