Assembling device and method for oil seal of casing of automatic transmission

Abstract

The invention discloses an assembling device and method for an oil seal of a casing of an automatic transmission. The assembling device comprises a sleeve, a guiding shaft, the oil seal and an adjusting nut; a thread is arranged on the circumferential surface of the bottom end of the sleeve; the adjusting nut is nested in the sleeve through threads; the top end of the guiding shaft extends into the sleeve from the bottom end of the sleeve; the diameter of the position, close to the bottom end, of the guiding shaft is larger than those of other positions of the guiding shaft; the oil seal is nested in the part, having the largest diameter, of the guiding shaft; and the top end of the oil seal fits the bottom end of the sleeve. According to the assembling device and method, the distance between the bottom end of the adjusting nut and the bottom end of the sleeve can be controlled and is the assembling depth of the oil seal, so that the moving distance of the oil seal is controlled, and the assembling depth of the oil seal can be controlled accurately; and the top end of the oil seal fits the bottom end of the sleeve, so that in the assembling process of the oil seal, the fitting surface is perpendicular to the axial direction all the time, slanting is avoided during assembling of the oil seal, and the assembling effect of the oil seal is guaranteed.

Description

technical field [0001] The invention belongs to the field of automobile transmission production and manufacturing, and relates to an automatic transmission housing oil seal assembly device and method. Background technique [0002] The oil seal is a key component in the mechanical transmission structure. The extremely narrow sealing contact surface of the sealing lip contacts the rotating shaft with a certain pressure, and the mechanical transmission parts are realized under the action of the oil film formed between the oil seal cutting edge and the rotating shaft. seal. Oil seal assembly is an important link in the transmission assembly process. There are currently many tools for oil seal assembly, which can be roughly classified into three categories: automatic oil seal assembly equipment, semi-automatic oil seal assembly equipment, and manual oil seal assembly equipment. Compared with automatic oil seal assembly equipment, oil seal manual assembly equipment has the advant...

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Problems solved by technology

[0003] For the integral case of the differential and the transmission, in the process of oil seal assembly in the area of ​​the differential case, it is necessary to ensure the relative axial position between the oil seal and the differential shaft to realize the alignment of the differential. Shaft seal, but actually in the process of assembling the oil seal, the assembly depth of the oil seal is determined by the distance between the upper blank surface of the housing and the upper end surface of the oil seal, and the machining and assembly errors of the housing and the differential assembly and the The change in structural design makes it difficult to ensure the oil seal assembly depth of each transmission through the distance between the upper blank surface of the housing and the upper end surface of the oil seal with only ordinary oil seal assembly tools, resulting in insufficient oil seal assembly, inconsistent oil seal assembly depth, Excessive press-in of the oil seal leads to deformation of the oil seal, poor retention of high-quality assembly of the oil seal, etc.

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