Loader drive axle main drive bearing cap bolt positioning structure

Abstract

The utility model discloses a bolt positioning structure for a main drive bearing cap of a loader drive axle. An inner ring of a tapered roller bearing is assembled on a differential shell shaft head, and an outer ring of the tapered roller bearing is assembled in a semicircle of a main speed reducer shell and a semicircle of a bearing cap; the adjusting nut is screwed into the semicircles of the main speed reducer shell and the bearing cover through screw-thread fit, and the inner end face of the adjusting nut abuts against the end face of the tapered roller bearing to axially limit the tapered roller bearing; mutually-butted transition holes are formed in the matching position of the main speed reducer shell and the bearing cover, the limiting pin sleeves are assembled in the transition holes and are in small-gap transition fit with the bearing cover bolts so as to limit looseness of the bearing cover bolts, and the bearing cover bolts lock the bearing cover on the main speed reducer shell. The main drive bearing cap is simple and compact in structure, low in manufacturing and maintenance cost and long in service life, and solves the problems that after a main drive bearing cap bolt is loaded, a gap is enlarged to cause looseness, an adjusting nut and a bearing are loosened, a differential bearing is damaged, and finally the service life of a drive axle assembly is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of a main transmission assembly of a loader drive axle, in particular to a main transmission bearing cover bolt positioning structure of a loader drive axle. Background Art

[0002] Wheel loaders in the domestic engineering machinery industry often work in harsh working environments, and overload and overload operations are serious, especially in working conditions such as iron ore and steel mills, where loader shoveling and overload operations are particularly obvious. Existing large-tonnage loaders such as 6-ton loaders generally use ordinary bolts to lock the main transmission bearing cover of the drive axle on the bracket. When the loader is working, the bearing cover will be slightly deformed by the radial thrust of the differential bearing and the adjusting nut. Under continuous heavy-load operation, the bolts will be slightly displaced, causing the bolt threads to loosen, and then the bolts will loosen, causing the adjusting nut threads to loosen and the bearings to loosen, causing the bearing clearance to increase, resulting in bearing damage and main transmission assembly damage, and ultimately causing the drive axle assembly to be unable to continue operating, reducing the service life of the drive axle. Summary of the invention

[0003] The purpose of the utility model is to solve the above defects and provide a loader drive axle main transmission bearing cover bolt positioning structure which has a simple and compact structure, low manufacturing and maintenance costs and long service life, so as to solve the problem in the prior art that the main transmission bearing cover bolts become loose due to the enlarged gap after being loaded, causing the adjustment nut and the bearing to loosen, resulting in damage to the differential bearing and ultimately reducing the service life of the drive axle assembly.

[0004] To achieve the above purpose, the utility model loader driving axle main transmission bearing cover bolt positioning structure comprises a main reducer housing 1, a tapered roller bearing 2, a differential housing 3, a bearing cover 4, a bearing cover bolt 5, an adjusting nut 6 and a limit pin sleeve 7; the inner ring of the tapered roller bearing 2 is assembled on the shaft head of the differential housing 3, and the outer ring is assembled in the semicircle of the main reducer housing 1 and the semicircle of the bearing cover 4; the adjusting nut 6 is screwed into the semicircle of the main reducer housing 1 and the semicircle of the bearing cover 4 through threaded cooperation circle, and the inner end face of the adjusting nut 6 is against the end face of the tapered roller bearing 2 to limit the axial position of the tapered roller bearing 2; the matching part of the main reducer housing 1 and the bearing cover 4 is provided with transition holes for installing the limit pin sleeve 7 which are butted against each other; the limit pin sleeve 7 is assembled in the transition holes between the main reducer housing 1 and the bearing cover 4, and a small clearance transition fit is adopted between the limit pin sleeve 7 and the bearing cover bolt 5 to limit the loosening of the bearing cover bolt 5, and the bearing cover bolt 5 locks the bearing cover 4 on the main reducer housing 1.

[0005] The bolt positioning structure for the main transmission bearing cover of the loader drive axle has the following technical features and beneficial effects by adding a matching pin sleeve at the transition position between the bearing cover and the bracket:

[0006] 1. The transition pin sleeve effectively limits the bearing cover bolts, effectively solving the problem in the prior art that the clearance of the main transmission bearing cover bolts becomes larger after being loaded, causing looseness, loosening of the adjustment nut and the bearing, causing damage to the bearing and leading to damage to the main transmission, thereby increasing the service life of the drive axle assembly.

[0007] 2. Simple and compact structure, easy assembly and reliable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The utility model is a left sectional structural schematic diagram of a main transmission bearing cover bolt positioning structure of a loader driving axle.

[0009] Figure 2 The utility model is a schematic diagram of the bottom view of the main transmission bearing cover bolt positioning structure of a loader driving axle.

[0010] Reference numerals: main reducer housing 1, tapered roller bearing 2, differential housing 3, bearing cover 4, bearing cover bolt 5, adjusting nut 6, limit pin sleeve 7. DETAILED DESCRIPTION

[0011] The specific implementation of the main transmission bearing cover bolt positioning structure of the loader drive axle of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0012] Figure 1 As shown, the bolt positioning structure of the main transmission bearing cover of the loader driving axle of the utility model comprises a main reducer housing 1, a tapered roller bearing 2, a differential housing 3, a bearing cover 4, a bearing cover bolt 5, an adjusting nut 6 and a limiting pin sleeve 7; the inner ring of the tapered roller bearing 2 is assembled on the shaft head of the differential housing 3, and the outer ring is assembled in the semicircle of the main reducer housing 1 and the semicircle of the bearing cover 4; the adjusting nut 6 is screwed into the semicircle of the main reducer housing 1 and the semicircle of the bearing cover 4 through threaded matching, and the inner end face of the adjusting nut 6 is supported against the end face of the tapered roller bearing 2 to limit the axial position of the tapered roller bearing 2; the matching part of the main reducer housing 1 and the bearing cover 4 is provided with a transition hole for installing the limiting pin sleeve 7 which is butted against each other; the limiting pin sleeve 7 is assembled in the transition hole of the main reducer housing 1 and the bearing cover 4, and a small clearance transition fit is adopted between the limiting pin sleeve 7 and the bearing cover bolt 5 to limit the loosening of the bearing cover bolt 5, and the bearing cover bolt 5 locks the bearing cover 4 on the main reducer housing 1.

[0013] The utility model loader drive axle main transmission bearing cover bolt positioning structure solves the problem that the main transmission bearing cover bolt gap becomes larger after being loaded, resulting in looseness, which leads to looseness of the adjustment nut and bearing, damage to the differential bearing and failure of the drive axle assembly. It greatly improves product quality and reduces the three guarantees cost of the enterprise.

[0014] When the loader is working, the differential bearing will rotate and be subjected to axial and radial thrust after being stressed. The limit pin sleeve 7 can effectively limit the displacement of the bearing cover bolt 5 after being stressed, thereby solving the problem in the prior art that the bearing cover bolt 5 is loosened, the adjustment nut 6 is loosened, and the bearing clearance is enlarged, causing bearing damage and main transmission damage.

Claims

1. A main transmission bearing cover bolt positioning structure for a loader drive axle, comprising a main reducer housing (1), a tapered roller bearing (2), a differential housing (3), a bearing cover (4), a bearing cover bolt (5) and an adjusting nut (6); the inner ring of the tapered roller bearing (2) is mounted on the shaft head of the differential housing (3), and the outer ring is mounted in the semicircle of the main reducer housing (1) and the semicircle of the bearing cover (4); the adjusting nut (6) is screwed into the semicircle of the main reducer housing (1) and the semicircle of the bearing cover (4) through threaded engagement, and the inner end face of the adjusting nut (6) is pressed against the end face of the tapered roller bearing (2) to limit the axial position of the tapered roller bearing (2); the characteristics are: It also includes a limit pin sleeve (7); transition holes for installing the limit pin sleeve (7) are provided at the mating positions of the main reducer housing (1) and the bearing cover (4); the limit pin sleeve (7) is assembled in the transition holes of the main reducer housing (1) and the bearing cover (4), and a small clearance transition fit is adopted between the limit pin sleeve (7) and the bearing cover bolt (5) to limit the loosening of the bearing cover bolt (5); the bearing cover bolt (5) locks the bearing cover (4) on the main reducer housing (1).

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