CN219865894U

CN219865894U - Split tapered roller bearing for undercarriage

Info

Publication number: CN219865894U
Application number: CN202321114576.1U
Authority: CN
Inventors: 郑世浩; 王启瑞; 乐上培; 王盛鑫; 陈德炜
Original assignee: FUJIAN YONGAN BEARING CO LTD
Current assignee: FUJIAN YONGAN BEARING CO LTD
Priority date: 2023-05-10
Filing date: 2023-05-10
Publication date: 2023-10-20
Anticipated expiration: 2033-05-10

Abstract

A split tapered roller bearing for an aircraft landing gear is formed by assembling two half outer rings, two half inner rings, two half retainers and a plurality of rollers, wherein the half retainers are made of copper materials, a plurality of roller pockets are formed in the half retainers at intervals, two inner side walls corresponding to roller rolling surfaces are arranged on the roller pockets in a spaced mode, a first limiting boss is arranged on one side, close to the half outer rings, of each roller pocket, a second limiting boss is arranged on the other side, close to the half inner rings, of each roller pocket, the height of each first limiting boss is larger than that of each second limiting boss, each roller is clamped between each first limiting boss and each second limiting boss, and the distance between each first limiting boss on two sides of each roller pocket is smaller than the corresponding diameter of each roller. When the roller assembly device is assembled, the rollers are blocked in the roller pockets, so that the rollers are prevented from falling out from the outer side direction of the retainer, and the convenience and the assembly efficiency of the roller assembly are improved; and the first limit boss and the second limit boss can be formed by machining the retainer, so that the production cost of the tapered roller bearing is reduced.

Description

Split tapered roller bearing for undercarriage

Technical Field

The utility model relates to the technical field of bearings, in particular to a split tapered roller bearing for an aircraft landing gear.

Background

Due to the special structure of the landing gear of the aircraft, the tapered roller bearing is of a split type structure. The tapered roller bearing consists of an outer ring, an inner ring, rollers and a retainer, wherein the retainer is mostly formed by stamping steel plates, but the shock resistance of the retainer is not strong, and the retainer is difficult to well adapt to the requirements of the landing impact force of an airplane. In order to overcome the defects, the Chinese patent publication No. CN 2793411Y discloses a tapered roller bearing for an aircraft landing gear, which is formed by assembling an outer ring, an inner ring, rollers and a retainer, wherein the retainer is made of brass materials with strong shock resistance and good processing technology through turning and milling to form a solid retainer, a pocket hole of the retainer adopts a conical pocket hole with good inclusion, and a spring retainer is arranged on one side of the small end face of the inner ring of the bearing.

The spring collar on the inner ring of the patent enables the retainer, the rolling body and the inner ring to form a combined body so as to ensure that the combined body cannot generate scattered sleeve phenomenon and has strong shock resistance. However, the manner in which the spring collar positions the rolling elements not only increases the cost of the fitting, but also makes assembly more cumbersome. To this end, we have improved to provide a split tapered roller bearing for an aircraft landing gear.

Disclosure of Invention

The utility model provides a split type tapered roller bearing for an aircraft landing gear, which mainly aims to overcome the defects that the cost is increased, the assembly is more complex and the like due to the fact that a spring collar is adopted to position a rolling body in the existing split type tapered roller bearing.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a split type tapered roller bearing that aircraft undercarriage was used, is assembled by two half outer lanes, two half inner lanes, two half holders and a plurality of roller and forms, half holder is made by copper material, and the interval is equipped with a plurality of roller pocket on this half holder, two inside walls that roller pocket and roller rolling surface correspond, its one side that is close to half outer lane is equipped with first spacing boss, and is close to the opposite side of half inner lane is equipped with the spacing boss of second, the height of the spacing boss of first is greater than the height of the spacing boss of second, the roller follow the inboard outside direction card of half holder goes into in the roller pocket, and the card is located between spacing boss of first spacing boss and the second, the distance is less than between the spacing boss of first of roller pocket both sides the corresponding diameter of roller to restrict the roller and deviate from between the spacing.

In a preferred embodiment, the inner side wall of each roller pocket is provided with a first limit boss near the upper part and the lower part of one side of the half outer ring, and a second limit boss near the upper part and the lower part of one side of the half inner ring.

In a preferred embodiment, the height of the first limiting boss is 0.15-0.20mm, and the height of the second limiting boss is 0.10-0.15 mm.

In a preferred embodiment, the two ends of the inner side surface of the half outer ring, which is in contact with the roller, are provided with first chamfers, and the two ends of the inner side surface of the half inner ring, which is in contact with the roller, are also provided with second chamfers.

In a preferred embodiment, the sum of the widths of two adjacent first chamfers at the joint of the two half outer rings is 0.55-1.1mm, and the depth is 0.2-0.5mm; the sum of the widths of two adjacent second chamfers at the joint of the two half inner rings is 0.55-1.1mm, and the depth is 0.2-0.5mm.

As can be seen from the above description of the structure of the present utility model, compared with the prior art, the present utility model has the following beneficial effects:

1. according to the roller pocket, the first limiting boss is arranged on one side, close to the half outer ring, of the two inner side walls of the roller pocket, the second limiting boss is arranged on the other side, close to the half inner ring, of the half retainer, the height of the first limiting boss is larger than that of the second limiting boss, the rollers are clamped into the roller pocket from the inner side to the outer side of the half retainer, the distance between the two first limiting bosses is smaller than the diameter corresponding to the rollers, and the rollers can be limited to be separated from one side of the first limiting boss. Therefore, the split tapered roller bearing can be assembled by clamping the rollers in the roller pockets to prevent the rollers from falling out of the outer side direction of the retainer, and the convenience and the assembly efficiency of the roller assembly are greatly improved; and the first limit boss and the second limit boss can be formed by machining the retainer, accessories are not required to be added, and the production cost of the tapered roller bearing is reduced.

2. The inner side surface end parts of the half inner ring and the half outer ring which are in contact with the rollers are polished with chamfers, so that stress concentration is avoided, the damage of a step layer to the rollers caused by production or assembly errors is reduced, and the service life of the split tapered roller bearing is prolonged.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an exploded view of the present utility model.

Fig. 3 is a cross-sectional view of the present utility model.

Fig. 4 is a partial cross-sectional view of the cage of the present utility model.

Fig. 5 is a partial front view of the present utility model in a direction perpendicular to the inner surface of the cage.

Fig. 6 is a cross-sectional view of the outer race of the present utility model.

Fig. 7 is a partial front view of the present utility model in a direction perpendicular to the inner surface of the outer race.

Detailed Description

Specific embodiments of the present utility model will be described below with reference to the accompanying drawings. Numerous details are set forth in the following description in order to provide a thorough understanding of the present utility model, but it will be apparent to one skilled in the art that the present utility model may be practiced without these details.

Referring to fig. 1 to 3, a split tapered roller bearing for an aircraft landing gear is assembled from two half outer rings 10, two half inner rings 20, two half retainers 30, and a plurality of rollers 40. The two half outer rings 10 form the outer ring of the split tapered roller bearing, the two half inner rings 20 form the inner ring of the split tapered roller bearing, and the two half retainers 30 form the retainers of the split tapered roller bearing.

Referring to fig. 2, 4 and 5, the half-cage 30 is made of copper material, and a plurality of roller pockets 300 are spaced apart from each other on the half-cage 30. The two inner side walls of the roller pocket 300 corresponding to the rolling surface of the roller 40 are provided with a first limit boss 31 on one side close to the half outer ring 10, and a second limit boss 32 on the other side close to the half inner ring 20.

Referring to fig. 4 and 5, as a preferred embodiment of the present embodiment, the inner sidewall of each roller pocket 300 is provided with a first limit boss 31 at the upper and lower portions near the half-outer ring 10 side, and a second limit boss 32 at the upper and lower portions near the half-inner ring 20 side.

Referring to fig. 4 and 5, the height of the first limit boss 31 is greater than the height of the second limit boss 32, which means that the first limit boss 31 or the second limit boss 32 protrudes from the inner sidewall of the roller pocket 300. The first limit boss 31 has a height of 0.15-0.20mm, and the second limit boss 32 has a height of 0.10-0.15 mm.

Referring to fig. 3 to 5, the rollers 40 are engaged into the roller pockets 300 from the inner side to the outer side of the half-cage 30, and are engaged between the first limiting bosses 31 and the second limiting bosses 32, and the distance between the first limiting bosses 31 at both sides of the roller pockets 300 is smaller than the corresponding diameter of the rollers 40, so as to limit the rollers 40 from falling out from between the first limiting bosses.

Referring to fig. 6 and 7, the inner side of the half-outer ring 10 contacting the roller 40 is provided with a first chamfer 11 at both ends thereof, and the inner side of the half-inner ring 20 contacting the roller 40 is also provided with a second chamfer (similar to the first chamfer, not shown). The damage of the step layer to the roller caused by production or assembly errors can be reduced, and the service life of the split tapered roller bearing is prolonged.

The sum of the widths of two adjacent first chamfers 11 at the joint of the two half outer rings 10 is 0.55-1.1mm, and the depth is 0.2-0.5mm; the sum of the widths of two adjacent second chamfers at the joint of the two half inner rings 20 is also 0.55-1.1mm, and the depth is also 0.2-0.5mm.

The foregoing is merely illustrative of specific embodiments of the present utility model, but the design concept of the present utility model is not limited thereto, and any insubstantial modification of the present utility model by using the design concept shall fall within the scope of the present utility model.

Claims

1. The utility model provides a split type tapered roller bearing that undercarriage was used, is assembled by two half outer lanes, two half inner lanes, two half holders and a plurality of roller and forms, half holder is made by copper material, and the interval is equipped with a plurality of roller pocket on this half holder, its characterized in that: the roller pocket is characterized in that two inner side walls corresponding to the roller rolling surface are arranged on one side, close to the half outer ring, of the roller pocket, a first limiting boss is arranged on the other side, close to the half inner ring, a second limiting boss is arranged on the other side, close to the half inner ring, the height of the first limiting boss is larger than that of the second limiting boss, the roller is clamped into the roller pocket from the inner side of the half retainer to the outer side, and is clamped between the first limiting boss and the second limiting boss, and the distance between the first limiting bosses on the two sides of the roller pocket is smaller than the corresponding diameter of the roller so as to limit the roller from falling out from the first limiting space.

2. A split tapered roller bearing for an aircraft landing gear as claimed in claim 1, wherein: the upper part and the lower part of one side close to the half outer ring are respectively provided with a first limit boss, and the upper part and the lower part of one side close to the half inner ring are respectively provided with a second limit boss.

3. A split tapered roller bearing for an aircraft landing gear as claimed in claim 2, wherein: the height of the first limit boss is 0.15-0.20mm, and the height of the second limit boss is 0.10-0.15 mm.

4. A split tapered roller bearing for an aircraft landing gear as claimed in claim 1, wherein: the two ends of the inner side surface of the half outer ring, which is in contact with the roller, are provided with first chamfers, and the two ends of the inner side surface of the half inner ring, which is in contact with the roller, are also provided with second chamfers.

5. A split tapered roller bearing for an aircraft landing gear as claimed in claim 1, wherein: the sum of the widths of two adjacent first chamfers at the joint of the two half outer rings is 0.55-1.1mm, and the depth is 0.2-0.5mm; the sum of the widths of two adjacent second chamfers at the joint of the two half inner rings is 0.55-1.1mm, and the depth is 0.2-0.5mm.