CN211039602U

CN211039602U - Mounting structure for main reducer bearing of drive axle

Info

Publication number: CN211039602U
Application number: CN201921413013.6U
Authority: CN
Inventors: 吴志强; 刘爱萍; 李春光; 杨东龙
Original assignee: Guangdong Fuwa Heavy Industry Co Ltd
Current assignee: Guangdong Fuwa Heavy Industry Co Ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-07-17
Anticipated expiration: 2029-08-28

Abstract

Drive axle main reducer bearing mounting structure, including the reduction gear shell, fix the end cover in the reduction gear shell outside, the gear shaft of cross-under on the end cover, and inner bearing and the outer bearing of setting between gear shaft and end cover, the part from interior to exterior that the gear shaft wore out the end cover is equipped with in proper order and compresses tightly the seat, the adjustment space ring, lock nut, the medial extremity butt that compresses tightly the seat is on the inner circle of outer bearing, lock nut spiro union is used for adjusting the space ring towards the medial extremity roof pressure of gear shaft on the gear shaft, be provided with one on the gear shaft and inject the spacing face that the adjustment space ring removed towards the gear shaft medial extremity, it is provided with a butt in the inboard holding surface of lock nut to compress tightly on. The utility model discloses when adjusting the bearing play, only need dismantle lock nut, change the adjustment spacer ring of appropriate thickness can, simplified the dismouting process, improved main reducer's assembly efficiency.

Description

Mounting structure for main reducer bearing of drive axle

Technical Field

The utility model relates to the technical field of vehicles, concretely relates to transaxle main reducer bearing mounting structure.

Background

The main reducer is an important component of a drive axle assembly, referring to fig. 1, the existing main reducers all comprise a reducer shell, a gear shaft 11 and an end cover 10, the end cover 10 is fixedly connected on the reducer shell, the gear shaft 11 is connected on the end cover 10 in a penetrating way, the gear shaft 11 and the end cover are rotatably matched through an inner bearing 12 and an outer bearing 13, a pressing seat 16 is further sleeved on the gear shaft 11, a locking nut 15 is screwed at the position where the gear shaft 11 penetrates through the pressing seat 16, when the main reducer is installed, the inner bearing 12 is sleeved on the gear shaft 11, then an adjusting spacer ring 14 is sleeved on the gear shaft 11, then the outer bearing 13, the pressing seat 15 and the locking nut 15 are sequentially sleeved, the locking nut 15 is screwed, the pressing seat 16 is pushed towards the inside of the main reducer by the locking nut 15, the inner ring of the outer bearing 13 is pressed by the pressing seat 16, and the pressing force is transmitted to the inner ring, the above-mentioned adjusting spacer 14 is interposed between the inner bearing 12 and the outer bearing 13 in order to adjust the play of the inner bearing 12 and the outer bearing 13 as required to prevent the inner bearing 12 and the outer bearing 13 from being too tight or too loose, and during the actual installation process, after the locking nut 15 is completely tightened, if the inner bearing 12 and the outer bearing 13 are too tight, the rotational flexibility of the gear shaft 11 is affected, if the inner bearing 12 and the outer bearing 13 are too loose, there may be a small amount of runout of the gear shaft 11 during rotation, which affects the normal operation of the final drive, therefore, it is necessary to replace the spacer 14 of different thickness to readjust the play of the inner bearing 12 and the outer bearing 13, therefore, the locking nut 15, the pressing seat 16, the outer bearing 13 and the adjusting spacer ring must be sequentially disassembled, so that the whole assembly process is complicated, and the assembly efficiency of the main speed reducer is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a drive axle main reducer bearing mounting structure, it can be when needs adjustment bearing play, simplifies the dismouting process, improves main reducer's assembly efficiency to prior art not enough, the utility model aims at providing a drive axle main reducer bearing mounting structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

drive axle main reducer bearing mounting structure, including the reduction gear shell, fix the end cover in the reduction gear shell outside, the gear shaft of cross-under on the end cover, and inner bearing and the outer bearing of setting between gear shaft and end cover, the part from interior to exterior that the gear shaft wore out the end cover is equipped with in proper order and compresses tightly the seat, the adjustment space ring, lock nut, the medial extremity butt that compresses tightly the seat is on the inner circle of outer bearing, lock nut spiro union is used for adjusting the space ring towards the medial extremity roof pressure of gear shaft on the gear shaft, be provided with one on the gear shaft and inject the spacing face that the adjustment space ring removed towards the gear shaft medial extremity, it is provided with a butt in the inboard holding surface of lock nut to compress tightly on.

The inner surface of the end cover is provided with a boss, the inner side surface of the boss abuts against the outer ring of the inner bearing, the outer side surface of the boss abuts against the outer ring of the outer bearing, and the inner ring of the inner bearing abuts against a mounting surface preset at the inner side end of the gear shaft.

The end cover is fixed on the shell of the speed reducer through a bolt, and an adjusting gasket is arranged between the end cover and the shell of the speed reducer.

The beneficial effects of the utility model reside in that:

compared with the prior art, the utility model discloses when adjusting the bearing play, only need dismantle lock nut, change the adjustment spacer ring of appropriate thickness can, simplified the dismouting process, improved main reducer's assembly efficiency.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is an enlarged view at a in fig. 2.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 2 and 3, for the utility model discloses a drive axle main reducer bearing mounting structure, it includes reduction gear housing 20, end cover 30, gear shaft 40, inner bearing 81 and outer bearing 82, end cover 30 fixed connection is in the outside of reduction gear housing 20, gear shaft 40 cross-under is on end cover 30, the part that gear shaft 40 is located end cover 30 inside is through inner bearing 81 and outer bearing 82 and the rotatable connection of end cover 30, gear shaft 40 wears out and is equipped with from interior to exterior in proper order on the part outside end cover 30 and compresses tightly seat 50, adjustment spacer ring 70, lock nut 60, the medial extremity butt that compresses tightly seat 50 is on the inner race of outer bearing 82. The lock nut 60 is screwed on the gear shaft 40, the adjusting space ring 70 is positioned at the inner side of the lock nut 60, the lock nut 60 is screwed, the adjusting space ring 70 can be pressed towards the inner side end of the gear shaft 40, a limiting surface 42 is arranged on the gear shaft, concretely, the limiting surface 42 can be formed by the end surface of a shaft shoulder on the gear shaft 40, the limiting surface 42 is positioned at the inner side of the adjusting space ring 70 and is used for limiting the adjusting space ring 70, that is, when the adjusting space ring 70 moves to be attached to the limiting surface 42, the adjusting space ring 70 can not move towards the inner side end of the gear shaft 40 continuously; in addition, a supporting surface 51 is provided on the pressing base 50, the outer diameter of the lock nut 60 is larger than the outer diameter of the adjustment spacer 70, the middle portion of the inner side surface of the lock nut 60 abuts against the adjustment spacer 70, and the edge portion abuts against the supporting surface 51, so that when the lock nut 60 is tightened, the middle portion presses the adjustment spacer 70, and simultaneously presses the pressing base 50 against the inner side end of the gear shaft 40, so that the pressing base 50 can apply pressing force to the inner ring of the outer bearing 82, and the limiting surface 42 and the adjustment spacer 70 limit the displacement of the pressing base 50 moving towards the inner side of the gear shaft 40.

The utility model discloses an above-mentioned structure is after preliminary installation is accomplished, when the play of outer bearing 82 is too big or the undersize, dismantle lock nut 60, change the adjustment spacer ring 70 of suitable thickness, for example, when the play of outer bearing 82 is too big, then change the adjustment spacer ring 70 of some less relatively of thickness, thus, after lock nut 60 is screwed again, compare under, compress tightly the displacement volume increase that seat 50 removed towards gear shaft 40 medial extremity, the displacement volume that produces after outer bearing 82 inner circle is by the roof pressure just increases promptly, vice versa, when the play of outer bearing 82 is less after the preliminary installation, then change the adjustment spacer ring 70 of some great relatively of thickness, reduce the displacement volume that compresses tightly seat 50. Therefore, the utility model discloses when the play of needs adjustment bearing, only need dismantle lock nut can, need not to dismantle and compress tightly seat, outer bearing, simplified the dismouting process promptly, improved main reducer's assembly efficiency.

In addition, the inner surface of the end cover 30 is provided with a boss 31, the inner bearing 81 and the outer bearing 82 are respectively arranged at two sides of the boss 31, specifically, the inner side surface of the boss 31 abuts against the outer ring of the inner bearing 81, the outer side surface of the boss 31 abuts against the outer ring of the outer bearing 82, and the inner ring of the inner bearing 81 abuts against the preset mounting surface 41 at the inner side end of the gear shaft 40, so that the inner bearing 81 is clamped between the boss 31 and the gear shaft 40, thus, the play of the inner bearing 81 can be adjusted by changing the mounting clearance between the end cover 30 and the reducer housing 20, for this, the utility model preferably adopts the structure that the adjusting gasket 21 is arranged between the end cover 30 and the reducer housing 20, and the end cover 30 is fixed on the reducer housing 20 through a plurality of bolts 22, and the play of the inner bearing 81 can be in the optimal state as long as the adjusting gasket 21 with proper thickness is replaced, and after the inner bearing 81 and the end cover 30 are installed, if the size of the play of the inner bearing 81 is not proper, the end cover 30 can be detached at the moment, the adjusting gasket 21 is replaced, and the installation process is further simplified.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The mounting structure of the main reducer bearing of the drive axle is characterized by comprising a reducer shell, an end cover fixed outside the reducer shell, a gear shaft connected onto the end cover in a penetrating mode, an inner bearing and an outer bearing which are arranged between the gear shaft and the end cover, a pressing seat, an adjusting space ring and a locking nut are sequentially sleeved on a part, penetrating out of the end cover, of the gear shaft from inside to outside, the inner side end of the pressing seat abuts against an inner ring of the outer bearing, the locking nut is screwed on the gear shaft and used for pressing the adjusting space ring towards the inner side end of the gear shaft, a limiting surface limiting the adjusting space ring to move towards the inner side end of the gear shaft is arranged on the gear shaft, and a supporting surface abutting against the inner side of the locking nut.

2. The drive axle final drive bearing mounting structure of claim 1, wherein the inner surface of the end cap is provided with a boss, an inner side surface of the boss abuts against an outer ring of the inner bearing, an outer side surface of the boss abuts against an outer ring of the outer bearing, and an inner ring of the inner bearing abuts against a predetermined mounting surface at an inner side end of the gear shaft.

3. The transaxle final drive bearing mounting structure of claim 2, wherein the end cap is fixed to the reducer case by a bolt, and an adjusting washer is further provided between the end cap and the reducer case.