SU1703506A1 - Central reducer of vehicle drive axle - Google Patents

Abstract

This invention relates to mechanical engineering and can be applied to drive axles of vehicles, for example, super high dump trucks. The purpose of the invention is to increase the durability and reliability of the central gearbox of the vehicle drive axle by increasing the equiparability of bearings. The radial-thrust reverse bearing is installed from the side of the ring gear along standard fittings of the supporting cylindrical surfaces, and the radial-resistant forward movement is from the cardan flange side, the supporting cylindrical surface of the inner diameter being divided by an annular cavity with a gear shaft. At the same time, between the ends of the outer rings of the support and thrust bearings of the backing there is a flat adjustment nut with wedge grooves on the threaded surface, and between the nut, the outer ring of the support bearing and the crankcase along the entire perimeter of the thread - an elastic 0-ring, for example of rubber . 4 il.

Description

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with

The invention relates to heavy machinery and can be applied in driving axles of vehicles, for example, super dump trucks.

The purpose of the invention is to increase reliability and durability by increasing the equal strength of bearings and simplifying service in operation.

FIG. 1 shows the bearing multi-turn bearing support of the central gearbox of the vehicle drive axle, longitudinal section; in fig. 2 — node I in FIG. one; in fig. 3 - adjusting nut; in fig. 4 shows section A-A in FIG. 3

The central gearbox 1 of the driving axle 2 of the vehicle contains a crankcase 3 a conical pair of gears 4 and 5 with a circular tooth b, including the gear shaft 4, mounted in the crankcase 3 on the multi-bearing roller bearing (Fig. 1) in which cylindrical ends 7 and 8 of pinion shaft 4 are housed bearings 9 and 10 and between them angular contact 11 and 12, as well as spacer rings 13, adjusting nuts 14 and 15, cardan flange 16, with angular contact bearing reverse 11 is installed on the side of the ring gear 17 standard fittings of supporting cylindrical surfaces, and a radial-thrust forward stroke 12 - from the side of the cardan flange 16, in addition, the supporting cylindrical surface 18 of the inner diameter is divided by an annular cavity 19 with a shaft gear 4, while between the ends 20 and 21 of the outer rings XI

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hips, support 9 and thrust 11 reverse, a flat adjusting nut 15 is installed with wedge grooves 22 on the threaded surface 23, and between the nut 15, the outer ring of the support bearing 9 and the crankcase 3 along the entire perimeter 23 is an elastic 0-ring 24 made of rubber.

The gearbox is assembled as follows.

The bearing 12 is pressed into the crankcase 3, the spacer ring 13 is mounted on its inner ring and the bearing 11 is pressed in so that there is a gap between it and this spacer ring, for example, 1-5 mm. Then by tightening the adjusting nut 15, this gap is reduced to zero and the chain is forcefully closed: nut 15, outer ring, balls, inner ring of bearing 11, spacer ring 13, inner ring, balls, outer ring of bearing 12, crankcase 3, i.e. . the greater the tightening torque of the nut 15, the greater the preload of bearings 11 and 12 are obtained. The preload is monitored by measuring the torque on the inner rings of these bearings. Next, an elastic 0-ring 24 is installed on the grooves 22 of the nut and pressed by pressing the outer ring of the bearing 9. In this case, the adjusting nut 15 is locked in place. Then the gear shaft 4 in the assembly with the inner ring of the bearing 9 and the other spacer ring 13 is pressed into the adjusted assembly bearing 11 side. On the other hand, a third spacer ring 13 is mounted on gear shaft 4 and bearing 10 is pressed in, the sleeve and flange 16 are mounted on the spline shaft and all this is tightened by nut 14.

The disassembly and adjustment during operation of the gearbox is carried out in reverse order.

Installing a radial-thrust bearing reverse 11 from the side of the ring gear 17 on standard landings in

combined with the installation of a radial-thrust standardized bearing 12 forward running from the flange of the universal joint 16 and the separation of the annular cavity 19 of the 4 best gear with the surface of the internal diameter 18 provides increased durability of the radial bearing bearing 9.

The installation of a flat adjusting nut 15 with wedge grooves 22 on the threaded surface 23 between the ends of the rings 20 and 21 of bearings 9 and 11 ensures smooth adjustment and eliminates additional axial stresses by stopping

in any position by jamming the threads 23 in the grooves 22 by an elastic rubber 0-ring 24.

Claims (1)

The formula of the invention of the central gearbox drive axle a vehicle that contains a crankcase, a tapered pair of gears with a circular tooth, including a gear shaft with a cardan flange, mounted in the crankcase on a multi-ring rolling bearing, including radial and forward and reverse radial thrust bearings, spacer rings, adjusting nuts, characterized in that, in order to increase reliability and durability by increasing the equal strength of the bearings, the angular contact bearing of the reverse running is mounted on the gear shaft from the gear ring side standard landings and a radial thrust forward course - from the side of the cardan flange, the gear shaft is provided with a circular groove for forming an annular cavity along the inner bearing surface of the specified bearing, the inner surface of the carger is threaded and the bearing unit with a flat adjusting nut with wedge grooves on the threaded surface installed between the outer ends backing and resilient bearing rings ring, made, for example, of rubber and installed between the specified nut and the end of the outer ring of the angular contact bearing. cr. tf W 21 AV