Hub bearing clearance adjusting mechanism for mining axle

Abstract

The utility model discloses a mining axle hub bearing clearance adjusting mechanism which comprises a pair of tapered roller bearings, a hub rotates relative to a shaft head through an inner bearing and an outer bearing, and the mining axle hub bearing clearance adjusting mechanism is characterized in that a bearing outer ring and a large end face of the bearing outer ring are tightly attached to a retaining shoulder of the hub; the shaft head, two end faces of the oil seal seat ring, two end faces of the bearing inner ring, two end faces of the elastic spacer bush, two end faces of the bearing inner ring, two end faces of the gear ring support and the right end face of the locking nut are sequentially attached. During operation, only the locking nut needs to be tightened according to the specified tightening torque, the elastic spacer bush can generate a certain compression amount, and the bearing clearance is automatically adjusted; the bearing clearance adjusting time is greatly shortened, and the bearing clearance adjusting efficiency is improved; meanwhile, unstable bearing clearance caused by manual adjustment is avoided, and the service life of the bearing is prolonged; and the end surfaces of the bearing inner ring are sequentially clung to each other without axial clearance, so that the bearing inner ring does not rotate relative to the shaft head any more, the bearing runs more stably, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of mining vehicle bridges, in particular to a mining vehicle bridge hub bearing clearance adjustment mechanism, which is suitable for all mining vehicle bridges. Background Art

[0002] The existing mining vehicle axle wheel hub bearings have multiple cases of damage during the warranty period. After theoretical calculation, the wheel hub bearing life meets the use requirements. Finally, through analysis, it is determined that, first, the improper adjustment of the wheel hub bearing clearance leads to a decrease in bearing life, and second, the relative rotation between the bearing inner ring and the shaft head causes the bearing to run unstable, affecting the bearing life.

[0003] At present, the bearing clearance is adjusted by tightening the locking nut with the specified torque and then retracting it. The retraction angle mainly depends on the worker's feel, which is difficult to control accurately. At the same time, because the inner ring of the bearing and the shaft head are matched with a small clearance, after the locking nut is retracted by a certain angle, a certain axial clearance will be generated in the inner ring of the bearing. During operation, the inner ring of the bearing and the shaft head will produce relative rotation, affecting the stability of the bearing operation and then affecting the bearing life. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a mining vehicle axle hub bearing clearance adjustment mechanism.

[0005] The technical solution provided by the utility model is: a mining vehicle axle wheel hub bearing clearance adjustment mechanism, comprising an inner bearing and an outer bearing, the two are a pair of tapered roller bearings, the wheel hub rotates relative to the shaft head through the inner bearing and the outer bearing, and the special feature is that the inner bearing outer ring and the outer bearing outer ring are press-fitted on the wheel hub by interference fit, and the large end faces of the inner bearing outer ring and the outer bearing outer ring are tightly attached to the shoulder of the wheel hub; the shaft head is sequentially provided with an oil seal seat ring, an inner bearing inner ring, an elastic spacer, an outer bearing inner ring, a gear ring bracket, and a locking nut; the oil seal seat ring is press-fitted on the shaft head by interference fit, the inner bearing inner ring, the elastic spacer, and the outer bearing inner ring are installed on the shaft head with clearance fit, the gear ring bracket is installed on the shaft head through a spline, and the locking nut is tightened on the shaft head through a thread.

[0006] Furthermore, the shaft head, the two end faces of the oil seal seat ring, the two end faces of the inner bearing inner ring, the two end faces of the elastic spacer, the two end faces of the outer bearing inner ring, the two end faces of the gear ring bracket, and the right end face of the locking nut are tightly attached in sequence.

[0007] Beneficial effects of the utility model:

[0008] 1. The bearing clearance is ensured by strictly controlling the size of the elastic spacer. During operation, the locking nut only needs to be tightened according to the specified tightening torque, and the elastic spacer will produce a certain amount of compression to automatically adjust the bearing clearance, greatly shortening the time for adjusting the bearing clearance and improving the efficiency of adjusting the bearing clearance. 2. The unstable bearing clearance caused by manual adjustment is avoided, and the bearing life is improved. 3. The end faces of the inner ring of the bearing are tightly attached in sequence without axial clearance, so the inner ring of the bearing no longer rotates relative to the shaft head, the bearing runs more stably, and the bearing life is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model.

[0010] In the figure, 1, shaft head, 2, oil seal seat ring, 3, inner bearing, 4, wheel hub, 5, outer bearing, 6, gear ring bracket, 7, locking nut, 8, elastic spacer, 9, inner ring of inner bearing, 10, outer ring of inner bearing, 11, inner ring of outer bearing, 12, outer ring of outer bearing. DETAILED DESCRIPTION

[0011] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0012] like Figure 1 As shown, a mining vehicle axle wheel hub bearing clearance adjustment mechanism includes a pair of tapered roller bearings, namely an inner bearing 3 and an outer bearing 5. The wheel hub 4 rotates relative to the shaft head 1 through the inner bearing 3 and the outer bearing 5. The inner bearing outer ring 10 and the outer bearing outer ring 12 are press-fitted on the wheel hub 4 by interference fit. The large end faces of the inner bearing outer ring 10 and the outer bearing outer ring 12 are tightly attached to the shoulder of the wheel hub 4. The oil seal seat ring 2, the inner bearing inner ring 9, the elastic spacer 8, the outer bearing inner ring 11, the gear Ring bracket 6, locking nut 7, wherein the oil seal seat ring 2 is press-fitted on the shaft head 1 with interference fit, the inner ring 9 of the inner bearing, the elastic spacer 8, and the outer bearing inner ring 11 are installed on the shaft head 1 with clearance fit, the ring gear bracket 6 is installed on the shaft head 1 through splines, and the locking nut 7 is tightened on the shaft head 1 through threads; the shaft head 1, the two end faces of the oil seal seat ring 2, the two end faces of the inner ring 9 of the inner bearing, the two end faces of the elastic spacer 8, the two end faces of the outer bearing inner ring 11, the two end faces of the ring gear bracket 6, and the right end face of the locking nut 7 are tightly attached in sequence.

[0013] The utility model discloses a mining vehicle axle wheel hub bearing clearance adjustment mechanism, which ensures the bearing clearance by strictly controlling the size of an elastic spacer sleeve. During operation, the locking nut only needs to be tightened according to the specified tightening torque, and the elastic spacer sleeve will produce a certain amount of compression to automatically adjust the bearing clearance. The time for adjusting the bearing clearance is greatly shortened, and the efficiency of adjusting the bearing clearance is improved. At the same time, the instability of the bearing clearance caused by manual adjustment is avoided, and the bearing life is improved. Furthermore, because the end faces of the inner ring of the bearing are tightly attached in sequence and there is no axial clearance, the inner ring of the bearing no longer rotates relative to the shaft head, the bearing runs more stably, and the bearing life is improved.

[0014] It should be understood that the technical features not elaborated in this specification belong to the prior art. Although the implementation methods of the utility model patent are described above in conjunction with the drawings, the utility model is not limited to the above specific implementation methods, which are only illustrative and not restrictive. Ordinary technicians in this field can make more forms under the enlightenment of the utility model without departing from the scope of protection of the purpose of the utility model and the claims, which are all within the protection scope of the utility model.

Claims

1. A mining vehicle axle wheel hub bearing clearance adjustment mechanism, comprising an inner bearing (3) and an outer bearing (5), which are a pair of tapered roller bearings, wherein the wheel hub (4) rotates relative to the shaft head (1) via the inner bearing (3) and the outer bearing (5), and wherein: The inner bearing outer ring (10) and the outer bearing outer ring (12) are press-fitted onto the wheel hub (4) by interference fit, and the large end faces of the inner bearing outer ring (10) and the outer bearing outer ring (12) are tightly attached to the shoulder of the wheel hub (4); the shaft head (1) is provided with an oil seal seat ring (2), an inner bearing inner ring (9), an elastic spacer (8), an outer bearing inner ring (11), a gear ring bracket (6), and a locking nut (7) in sequence; the oil seal seat ring (2) is press-fitted onto the shaft head (1) by interference fit, the inner bearing inner ring (9), the elastic spacer (8), and the outer bearing inner ring (11) are installed on the shaft head (1) by clearance fit, the gear ring bracket (6) is installed on the shaft head (1) by splines, and the locking nut (7) is screwed onto the shaft head (1) by threads.

2. A mining vehicle axle hub bearing clearance adjustment mechanism according to claim 1, characterized in that: The shaft head (1), the two end faces of the oil seal seat ring (2), the two end faces of the inner bearing inner ring (9), the two end faces of the elastic spacer (8), the two end faces of the outer bearing inner ring (11), the two end faces of the gear ring bracket (6), and the right end face of the locking nut (7) are tightly attached in sequence.

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