A method for assembling the large gear of the gearbox and the axle
An assembly method and large gear technology, which is applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of large gear end jump out-of-tolerance rate, complex assembly process, and low assembly efficiency, and achieve end-run out-of-tolerance Reduced, convenient assembly process, and improved efficiency
Active Publication Date: 2017-04-05
CRRC QISHUYAN INSTITUTE CO LTD
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Problems solved by technology
[0008] The technical problem to be solved by the present invention is how to overcome the defects of the existing shrink-fit method, such as complex assembly process, low assembly efficiency, and high out-of-tolerance rate of large gear end jump after assembly.
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[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0051] Such as Figure 1 to Figure 5 As shown, the present invention provides a method for assembling the large gear of the gearbox and the axle, comprising the following steps:
[0052] S1. Measure the diameter of the inner hole of the bull gear 1 and the diameter of the mating surface of the axle 2, calculate the interference and confirm that it is within the acceptable range, and record the measurement results and the numbers of the bull gear 1 and axle 2 for la...
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The invention discloses a gearbox large gear and axle assembling method. The method comprises the steps of S1, fixing a large gear on a tool station of an oil press; S2, placing an axle coated with a lubricant in an inner hole of the large gear; S3, moving the oil press to enable an upper tip of the oil press to be located above the axle, and lifting an oil press working table till a center hole of the axle makes contact with the upper tip, wherein the tip retracts under pressure after making contact with the center hole of the axle, and the upper end face of the axle is attached to the end face where the upper tip of the oil press is located; S4, conducting press fitting on the large gear and the axle with the oil press. By the adoption of the method, assembly process is simple and efficient, time for cooling after the process is saved, the next procedure can be conducted directly, environment friendliness is realized, economical performance is high, and resources are saved.
Description
technical field [0001] The invention relates to the technical field of assembling a large gear of a gearbox and an axle, in particular to a method for assembling a large gear of a gearbox and an axle. Background technique [0002] At present, the large gears and axles of most rail transit gear boxes in my country generally adopt the shrink-fit method, that is, heat the large gears to expand the inner hole, then put the axles vertically, and hold them tightly after cooling to achieve the purpose of interference fit. . [0003] However, there are many problems in the assembly process of the shrink-fit method, such as: [0004] 1) The out-of-tolerance rate of the end jump of the large gear is relatively high after assembly. After the large gear is assembled in the traditional shrink-fit method, due to the uneven heat transfer between the large gear and the axle, the end jump of the large gear may appear out of tolerance after the large gear and the axle are tightly hugged, and...
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IPC IPC(8): B23P19/027
CPCB23P19/027
Inventor 田雪涛范帅刘升丁仲奇杨牧原巢海斌
Owner CRRC QISHUYAN INSTITUTE CO LTD