Differential mechanism shell and gear assembly

Abstract

The invention provides a differential mechanism shell and gear assembly, which comprises a shell, wherein the periphery of the shell is provided with a transmission gear in a sleeving mode, the periphery of the shell is provided with an external spline, the wall of a center hole of the transmission gear is provided with an internal spline, and the external spline and the internal spline form a spline connection structure for limiting circumferential rotation of the transmission gear relative to the shell; the periphery of the shell is further provided with a flange, the flange is arranged on one side of the external spline and connected with the side surface of the transmission gear in an abutting mode; the side, which is close to the flange, of the external spline is lower than the side,which is away from the flange, of the external spline, the distance L1 between the side surface of the side, which is away from the flange, of the external spline and the flange is greater than the hub width L2 of the transmission gear, and the external spline and the flange jointly act to limit axial movement of the transmission gear relative to the shell. According to the invention, through thearrangement of spline connection and cooperative use of the external spline and the flange, the existing bolt connection mode is replaced, the processing procedures are reduced, the cost and the assembly weight are reduced, and the actual meshing precision of the gear is improved through gear grinding after spline connection.

Description

technical field [0001] The invention relates to the technical field of motor vehicle differentials, in particular to a differential case and a gear assembly. Background technique [0002] The differential can make the left and right (or front and rear) driving wheels of the car rotate at different speeds, and is an essential part of the motor vehicle. The power of the engine enters the differential through the transmission shaft, specifically through the driving gear arranged on the transmission shaft and the driven gear on the differential case, and the torque is transmitted through the meshing of the gears. At present, the assembly method of the differential housing and the driven gear is mainly connected by bolts and / or riveted by rivets, and there are the following problems: [0003] 1. The differential case and gears need to be drilled and tapped, and there are many processes, and a flange needs to be installed on the differential case, which increases the mass of the ...

AI Technical Summary

Problems solved by technology

[0003] 1. The differential case and gears need to be drilled and tapped, and there are many processes, and a flange needs to be installed on the differential case, which increases the mass of the case;

[0004] 2. The torque transmission capacity of bolts is limited;

[0005] 3. If the control of the assembly process is not in place, the bolts are easy to loosen under the complex operating conditions of the vehicle;

[0006] 4. The differential case and gears are separately processed into finished products and then assembled. Due to part errors and assembly errors, the actual meshing accuracy of the gears is not high

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