Minor semi-axis of transmission system of FSAE (Formula SAE) racing car

Abstract

The invention discloses a minor semi-axis of a transmission system of an FSAE (Formula SAE) racing car, and aims at fitting a CUSCO LSD (Limited Slip Differential) and a tripod universal joint. The system is high in strength, light in mass, compact in structure, convenient to assemble, and safe and reliable in power transmission. According to the technical scheme, the system comprises an axis end which is connected to a bevel gear of the CUSCO LSD, and a housing which is integrally arranged to the axis end, wherein the housing is connected to a tripod bearing assembly, and the tripod bearing assembly is connected to a major semi-axis through the tripod universal joint; mounting parts of a check ring, a bearing and a sealing ring are sequentially arranged on the axis end; the housing is provided with a mounting channel (109) of the tripod bearing assembly; a mounting part (107) of a ball basket type dustproof sleeve and a plurality of weight reduction grooves (106) are formed in the outer side of the housing; a mounting part (108) of a clamping spring is arranged in the mounting channel (109) of the tripod bearing assembly.

Description

technical field [0001] The invention belongs to the field of drive axles in vehicle transmission systems, and relates to a short half shaft of an FSAE racing car transmission system. Background technique [0002] Formula SAE (FSAE) was launched by SAE International in 1978. Its concept originated from a virtual production factory, soliciting from all college student design teams to design and manufacture a small car similar to the standard formula, requiring the car to accelerate, It has excellent performance in terms of braking and handling, and is stable and durable enough. Since China began to introduce FSAE events in 2010, domestic college teams have developed rapidly. According to the registration situation in 2015, the competition has expanded to more than 70 teams. [0003] The power transmission device between the car engine and the driving wheels is called the car's drive train. The basic function of the car drive train is to transmit the power from the engine to t...

AI Technical Summary

Problems solved by technology

[0006] The original minor axle shaft used on FSAE racing cars, see figure 1 , figure 2 and image 3 , mainly has the following disadvantages: First, because the original short half shaft is to be connected with the tripod type universal joint, its outer end is connected with the three-column groove shell through a spline, and then the tripod bearing assembly is assembled in the three-column groove In the groove of the shell, this will greatly increase the weight and volume, which is obviously not suitable for FSAE racing cars that have high requirements for lightweight

Second, after the original short half shaft is connected to the three-column housing, the axial length of the entire differential assembly will become longer, which will interfere with the frame, and the rear axle of the frame will often have to be compromised, which will affect vehicle design

Third, the original short half shaft and the three-column housing are connected by splines. For extreme racing competitions such as FSAE, the speed of the racing car is very fast, and the vehicle jumps a lot during the movement, which is reflected in the drive train is the long half shaft. Jumping up and down, the three-column groove shell and the original short half shaft will also jump together, and sometimes the short half shaft will fly out of the differential, which poses a great safety hazard

Fourth, the axial positioning of the original short semi-shaft adopts the shaft shoulder positioning, and there must be bearings on both sides of the shaft shoulder, which will not only increase the quality of the entire transmission system, but also make disassembly and assembly very inconvenient

[0007] With the rapid development of FSAE racing cars, fuel racing cars and electric racing cars have used engines and motors with greater torque as power sources, which has greatly improved the power and weight of the racing car, which has a greater impact on the short half shaft of the car. Higher requirements, the above-mentioned original short half shaft can no longer be well applied to FSAE racing cars

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