Double-row needle bearing for special vehicle

Abstract

The utility model discloses a special vehicle double-row needle roller bearing which comprises a lining outer ring and needle rollers arranged in the lining outer ring, needle roller check rings are arranged at the two axial ends of the inner wall of the lining outer ring, a middle check ring is arranged in the middle of the inner wall of the lining outer ring, and roller paths are formed between the needle roller check rings at the two ends of the lining outer ring and the middle check ring. The roller paths are filled with roller pins; conical needle tails concentric with the roller pins are arranged at the two axial ends of the roller pins, conical ring flanges attached to the bottoms of the conical needle tails are arranged at the inner circle of the end face of the inner side of the roller pin check ring and the inner circles of the end faces of the two sides of the middle check ring, and the circumferential outer walls of the roller pins are attached to the circumferential inner wall of the lining outer ring in a rolling mode; the roller pin assembly structure has the advantages that the roller pins are convenient to assemble, the roller pin assembly efficiency is high, the contact area between the roller pins and a shaft is increased, and the bearing capacity is improved; oil injection and lubrication are convenient, and the service life and stability of the needle bearing are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of needle roller bearings, in particular to a double-row needle roller bearing for special vehicles. Background Art

[0002] The rolling bushing is installed in the body bracket of the special vehicle for use, the balancing elbow is installed in the rolling bushing hole, the external load is transmitted to the balancing elbow through the road wheel, and then to the rolling bushing, and the rolling bushing mainly bears the swing load; the patent publication number CN207080508U discloses a stamped full needle roller bearing, which specifically discloses a bearing outer ring and needle rollers arranged in a full-filled form on the outer ring raceway. The bearing is a single-row needle roller bearing, which has poor load-bearing capacity, running performance and stability, inconvenient needle roller assembly, and inconvenient oiling and lubrication, which affects the service life and stability of the needle roller bearing. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a double-row needle roller bearing for special vehicles. The needle rollers are easy to assemble, have a simple structure, high needle assembly efficiency, flexible rotation, and no jamming; the contact area between the needle rollers and the shafts is increased, the load-bearing capacity and operating performance are improved, and good stability is guaranteed; the inside of the needle roller bearing can be fully oiled and lubricated to ensure the service life and stability of the needle roller bearing, and the problems in the background technology can be effectively solved.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a special vehicle double-row needle roller bearing, comprising a bushing outer ring and needle rollers arranged therein, needle roller retaining rings are arranged at both axial ends of the inner wall of the bushing outer ring, an intermediate retaining ring is arranged at the middle position of the inner wall of the bushing outer ring, and raceways are formed between the needle roller retaining rings at both ends of the bushing outer ring and the intermediate retaining ring, and the raceways on both sides are filled with needle rollers; conical needle tails are arranged concentrically with the needle rollers at both axial ends, the total length of the needle rollers is adapted to the width of the raceway, the inner circle of the inner side end face of the needle roller retaining ring and the inner circle of the end faces on both sides of the intermediate retaining ring are provided with tapered ring retaining edges that fit with the bottom of the tapered needle tail, and the circumferential outer walls of the needle rollers are rollingly fitted with the circumferential inner wall of the bushing outer ring; a needle loading notch is provided on the circumferential inner wall of the needle roller retaining ring.

[0005] Furthermore, a lubrication ring groove is provided on the circumferential outer wall of the outer ring of the bushing at a position corresponding to the middle retaining ring, and an oil injection through hole is provided on the lubrication ring groove.

[0006] Furthermore, the outer circumference of the inner end surface of the needle roller retaining ring and the outer circumference of the end surfaces on both sides of the intermediate retaining ring are both provided with clearance grooves.

[0007] Compared with the prior art, the beneficial effects of the utility model are as follows: the double-row needle roller bearing for special vehicles is convenient to assemble, has a simple structure, and has a high needle installation efficiency; the double-row needle rollers are fully loaded and roll in the outer ring of the bushing, and rotate flexibly without sticking; the contact area between the needle rollers and the shaft is increased, the load-bearing capacity and operating performance are improved, and good stability is ensured; the oil filling through hole and the lubrication ring groove are used to facilitate comprehensive oil filling and lubrication of the inside of the needle roller bearing, thereby ensuring the service life and stability of the needle roller bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the utility model;

[0009] Figure 2 This is a schematic diagram of the needle roller structure of the utility model;

[0010] Figure 3 This is a side view of the outer ring of the bushing of the utility model;

[0011] Figure 4 This is a cross-sectional view of the outer ring of the bushing of the utility model;

[0012] Figure 5 for Figure 4 Partial enlarged image.

[0013] In the figure: 1. Bushing outer ring; 11. Needle roller retaining ring; 12. Intermediate retaining ring; 13. Needle installation gap; 14. Lubrication ring groove; 15. Oil injection hole; 2. Needle roller; 21. Tapered needle tail; 3. Raceway; 31. Tapered ring retaining edge; 32. Clearance groove. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0015] See also Figure 1-5The utility model provides a technical solution: a special vehicle double-row needle roller bearing, comprising a bushing outer ring 1 and a needle roller 2 arranged therein, needle roller retaining rings 11 are arranged at both axial ends of the inner wall of the bushing outer ring 1, an intermediate retaining ring 12 is arranged at the middle position of the inner wall of the bushing outer ring 1, and raceways 3 are formed between the needle roller retaining rings 11 and the intermediate retaining rings 12 at both ends of the bushing outer ring 1, and the raceways 3 on both sides are filled with needle rollers 2; both axial ends of the needle roller 2 are provided with conical needle tails 21 concentric with each other, the total length of the needle roller 2 is adapted to the width of the raceway 3, and the needle roller retaining ring 11 is provided with a conical needle tail 21 concentric with the needle roller 2 ... The inner circle of the side end face and the inner circle of the end faces on both sides of the intermediate retaining ring 12 are both provided with a tapered ring retaining edge 31 that fits with the bottom of the tapered needle tail 21, and the circumferential outer wall of the needle roller 2 is rollingly fitted with the circumferential inner wall of the bushing outer ring 1, and the outer circle of the inner end face of the needle roller retaining ring 11 and the outer circle of the end faces on both sides of the intermediate retaining ring 12 are both provided with a clearance groove 32; a needle mounting notch 13 is provided on the circumferential inner wall of the needle roller retaining ring 11; a lubrication ring groove 14 is provided on the circumferential outer wall of the bushing outer ring 1 at the position corresponding to the intermediate retaining ring 12, and an oil injection through hole 15 is provided on the lubrication ring groove 14.

[0016] When installing the double-row needle roller bearing: install the needle rollers 2 one by one in an inclined manner into the raceway 3 of the outer ring 1 of the bushing, and the tapered needle tails 21 at both ends of the needle rollers 2 fit with the tapered ring ribs 31 on both sides of the raceway 3 to prevent the needle rollers 2 from falling out of the raceway 3, until there are 2-4 needle rollers 2 left in the raceway 3, and the remaining 2-4 needle rollers 2 fill the entire raceway 3 through the needle installation notch 13, and the clearance groove 32 makes way for the installation of the needle rollers 2, making it easier for the needle rollers 2 The support raceway 3 is quickly assembled, and after the raceway 3 is filled with needle rollers 2, the needle rollers 2 are neatly arranged along the axial direction of the bushing outer ring 1; when the double-row needle roller bearing is in use, an external oiling device can inject oil into the bushing outer ring 1 through the oiling through hole 15, and the lubricating oil in the oiling through hole 15 can flow into the raceways 3 on both sides through the intermediate retaining ring 12, so as to realize oiling and lubrication of the double-row needle rollers 2; the lubricating ring groove 14 facilitates the lubricating oil to enter the bushing outer ring 1.

[0017] The double-row needle roller bearing for special vehicles disclosed in this embodiment has a double-row needle roller bearing whose needle rollers 2 are easy to assemble, has a simple structure, and has a high needle installation efficiency. The double-row needle rollers 2 are fully loaded in the outer ring 1 of the bushing and roll flexibly without sticking. The contact area between the needle rollers 2 and the shaft is increased, the load-bearing capacity and operating performance are improved, and good stability is ensured. The oil filling through hole 15 and the lubrication ring groove 14 facilitate full oil filling and lubrication of the interior of the needle roller bearing, thereby ensuring the service life and stability of the needle roller bearing.

[0018] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-row needle roller bearing for special vehicles, comprising a bushing outer ring and a needle roller arranged inside the bushing, characterized in that: Needle roller retaining rings are provided at both axial ends of the inner wall of the outer ring of the bushing, and an intermediate retaining ring is provided at the middle position of the inner wall of the outer ring of the bushing, and raceways are formed between the needle roller retaining rings at both ends of the outer ring of the bushing and the intermediate retaining ring, and the raceways on both sides are filled with needle rollers; conical needle tails that are concentric with each other are provided at both axial ends of the needle roller, and the total length of the needle roller is adapted to the width of the raceway, and conical ring retaining edges that fit with the bottom of the conical needle tail are provided at the inner circle of the inner side end face of the needle roller retaining ring and the inner circle of the end faces on both sides of the intermediate retaining ring, and the circumferential outer wall of the needle roller is rollingly fitted with the circumferential inner wall of the outer ring of the bushing; a needle loading notch is provided on the circumferential inner wall of the needle roller retaining ring.

2. A double-row needle roller bearing for special vehicles according to claim 1, characterized in that: A lubrication ring groove is provided on the circumferential outer wall of the outer ring of the bushing at a position corresponding to the middle retaining ring, and an oil injection through hole is provided on the lubrication ring groove.

3. A double-row needle roller bearing for special vehicles according to claim 1, characterized in that: The outer circumference of the inner end surface of the needle roller retaining ring and the outer circumference of the end surfaces on both sides of the intermediate retaining ring are both provided with clearance grooves.

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