CN210344035U

CN210344035U - Sealed cylindrical roller bearing with inner ring provided with shaft

Info

Publication number: CN210344035U
Application number: CN201921403656.2U
Authority: CN
Inventors: 周小林; 丁进
Original assignee: Hangzhou Chichuang Axle Research Technology Co Ltd
Current assignee: Hangzhou Chichuang Axle Research Technology Co Ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-04-17
Anticipated expiration: 2029-08-27

Abstract

The utility model discloses a sealed cylindrical roller bearing of inner circle belting axle, including outer lasso, the inner race, cylindrical roller, the axial retaining ring, whole holder, the oil blanket, the axial region of convex part both sides is located including convex part and the symmetry in the middle of locating to the inner race, the outside of inner race is equipped with whole holder with the corresponding position of interior raceway, wherein install the cylindrical roller that the several was arranged along circumference equidistance on the whole holder, and the step of the both sides of inner race is equipped with the interference embedding, be used for the axial spacing axial retaining ring of cylindrical roller, the outer lasso cover is established in the outside of inner race, wherein the intermediate position of the inner wall of outer lasso is equipped with all is equipped with the seal groove that is used for installing the oil blanket with the both ends of the inner wall of interior raceway matched with outer raceway outer lasso, and. The utility model discloses compact structure, simple to operate, rigidity increases, is applicable to any operating mode, operates steadily, and the load is high, and is longe-lived.

Description

Sealed cylindrical roller bearing with inner ring provided with shaft

Technical Field

The utility model belongs to the technical field of the bearing, concretely relates to sealed cylindrical roller bearing of inner circle tape spool.

Background

The air compressor is the main body in the air supply device, and is mainly divided into three types of applications on automobiles: brake system, door pump and clutch wheel cylinder, air suspension. Different air compressors have different purposes, and the air compressor for the vehicle also has own characteristics, and the slide vane machine and the small-size piston machine are more suitable for the new energy automobile at present by contrast. But limited by the vehicle-mounted environment, compressed air post-processing equipment cannot be excessively arranged, and one-time investment cost and additional maintenance cost can be increased, so that the vehicle-mounted air compressor is mainstream in the direction of no oil machine development and also meets the requirement of green and environment-friendly new energy. The demand of the new energy automobile for the vehicle-mounted oil-free air compressor can be described as the following aspects: the safety, reliability and durability are realized; energy conservation, high efficiency and low maintenance cost; the peripheral control pipelines are few, and the integration level is high; low running noise, small external dimension, light weight and the like.

JT/T1094 standard has promoted the interior work atmospheric pressure value of service brake pipeline, requires the air compressor machine to improve work efficiency promptly, and this has just led to the production of a contradiction, requires air compressor machine operating pressure to improve on the one hand, and on the other hand requires the air compressor machine when compressed air, will be more energy-conserving. On the basis, the new energy vehicle-mounted air compressor realizes the conversion from a single cylinder machine, a double cylinder machine and a four cylinder machine to a multi-cylinder machine, and simultaneously requires high efficiency and weight reduction on the basis of energy conservation. The performance of the bearing as a main component of the air compressor is also more challenging.

The existing full needle bearing or deep groove ball bearing structure is shown in figure 1 and comprises an outer ring (1), an inner ring (2), a needle roller (3), a retainer ring (4) and an oil retaining rubber ring (5). The retainer ring (4) is pressed into the inner ring (2) in an interference manner to realize axial limiting of the needle roller (3), the inner ring (2) of the needle roller bearing is matched with the crankshaft, and the outer ring (1) is matched with the connecting rod.

Because multi-cylinder oilless air compressor machine promotes for ordinary air compressor machine power, and efficiency is higher, and changes traditional oily lubrication into oilless lubrication, and the bearing is as main load-carrying members, and its structure will face bigger examination. The existing full needle bearing is arranged at the crank end and has the following problems:

1) when the full-complement needle roller bearing is used for pursuing high rated load, the full-complement needle roller bearing is not suitable for occasions with high-speed operation because of no integral retainer;

2) in the continuous operation process, the full-complement needle roller bearing must bear certain minimum load, namely C/P is less than 25, otherwise, the needle rollers are easy to collide with each other, and abrasion and energy loss are generated;

3) because the inner space of the full-filling needle bearing is limited, the lubricating grease can not be stored, the bearing is easy to run in poor oil, the temperature rise is high, and the service life of the bearing is shortened;

4) because the new forms of energy oil-free air compressor machine work requires to have comparable sealing performance, compressed air easily produces steam in the course of the work simultaneously, and is required highly to bearing sealing performance, and needle bearing's sealing performance can't reach the host computer requirement.

The multi-cylinder oil-free air compressor also adopts a deep groove ball bearing for a crank end, and has the following problems in several aspects:

1) the overall dimension is great, and weight is heavier: the overall dimension of the deep groove ball bearing reaches 52mm as that of a conventional 50-cylinder-diameter four-cylinder machine 6304 bearing product, so that the arrangement of multiple cylinders of an air compressor is inconvenient, and the weight is heavy, so that the requirement of weight reduction of a new energy automobile is not met;

2) the deep groove ball bearing has limited bearing capacity, and is not beneficial to the improvement of the performance of a main machine and the guarantee of the service life in the future of increasing air pressure as a mainstream development direction;

3) because the bearing has a larger overall dimension, if a higher sealing requirement is required, the bearing width must be larger, which causes a great increase in the weight of the bearing, but the conventional RS and the optimized sealing performance thereof cannot meet the sealing performance requirement of the main machine.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an inner circle area axle's sealed cylindrical roller bearing to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an inner circle area axle's sealed cylindrical roller bearing which the structural feature lies in: the roller cage comprises an outer race, an inner race, cylindrical rollers, axial retainer rings, an integral retainer and an oil seal, wherein the inner race comprises a convex part arranged in the middle and shaft parts symmetrically arranged at two sides of the convex part, the convex part and the shaft parts are arranged integrally, an inner raceway is arranged on the outer wall of the convex part, a step is arranged between the convex part and the shaft part, the integral retainer is arranged at the position, corresponding to the inner raceway, of the outer side of the inner race, a plurality of cylindrical rollers which are arranged at equal intervals along the circumferential direction are arranged on the integral retainer, the steps at two sides of the inner race are provided with the axial retainer rings which are embedded in an interference manner and used for axially limiting the cylindrical rollers, the outer race is sleeved at the outer side of the inner race, an outer raceway matched with the inner raceway is arranged at the middle position of the inner wall of the outer race, the cylindrical rollers can move, and lubricating grease is filled between the oil seal and the seal groove.

Preferably, the oil seal is made of FKM material.

Preferably, the grease is a perfluoropolyether grease.

Preferably, the inner ferrule is a hollow structure.

Compared with the prior art, the utility model discloses beneficial effect does:

1) the inner ring and the crankshaft are integrally arranged, so that the diameter of the roller is increased, the bearing capacity is improved by about 30 percent, the rolling body is transited from the roller pin with smaller outer diameter to the cylindrical roller with larger outer diameter, and the rigidity is increased;

2) the inner ring and the crankshaft are integrally arranged, so that the structure is compact, the installation is convenient, the rigidity is improved, and the weight is reduced;

3) compared with a full needle bearing, the solid integral retainer is arranged between the cylindrical rollers for spacing and guiding, so that the full needle bearing is suitable for high-speed shaking working conditions, and collision energy loss between the full needle bearing needles is avoided;

4) compared with a full needle bearing, the interference surface of the axial retainer ring is widened, the operation is more stable under the impact load, and the occurrence of axial float scattering is avoided;

5) compared with a ball bearing and a full needle bearing, the bearing is provided with an oil seal made of FKM materials, so that lubricating grease can be pre-stored, and the lubrication of the bearing in a high-speed state is ensured;

6) the perfluoropolyether lubricating grease has the characteristics of solid additive and low volatility, and can realize carefree lubrication in heavy-load occasions;

7) compared with a ball bearing, the outer diameter of the bearing can be reduced by 50 percent, the weight is reduced by 60 percent, and interference is avoided when more than four cylinders work;

8) compared with a ball bearing, the rated dynamic load of the bearing is improved by 50%, the service life is improved by 3.5 times, and the service life can reach 15000h through analysis of a ROMAX system and far exceeds the existing requirements of customers.

Drawings

FIG. 1 is a schematic view of an existing crank end needle bearing;

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

in the figure: 1-outer ring, 2-inner ring, 3-rolling needle, 4-retainer ring, 5-oil-retaining rubber ring, 6-outer ring, 7-inner ring, 8-cylindrical roller, 9-axial retainer ring, 10-integral retainer, 11-oil seal, 12-inner raceway, 13-step, 14-outer raceway, 15-seal groove, 16-convex part and 17-shaft part.

Detailed Description

The invention is further explained with reference to the drawings, without limiting the scope of protection of the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Referring to fig. 2, the present invention provides a technical solution, a sealed cylindrical roller bearing with an inner ring having a shaft, comprising an outer ring 6, an inner ring 7, cylindrical rollers 8, an axial retainer ring 9, an integral cage 10, and an oil seal 11, wherein the inner ring 7 comprises a convex portion 16 arranged in the middle and shaft portions 17 symmetrically arranged at two sides of the convex portion 16, wherein the convex portion 16 and the shaft portions 17 are integrally arranged, an inner raceway 12 is arranged on the outer wall of the convex portion 16, a step 13 is arranged between the convex portion 16 and the shaft portions 17, the integral cage 10 is arranged at a position corresponding to the inner raceway 12 outside the inner ring 7, wherein the integral cage 10 is provided with a plurality of cylindrical rollers 8 equidistantly arranged along the circumferential direction, the steps 13 at two sides of the inner ring 7 are provided with the axial retainer ring 9 for axial position limitation of the cylindrical rollers 8 by interference insertion, the outer ring 6 is sleeved on the outer side of the inner ring 7, wherein the intermediate position of the inner wall of outer race 7 is equipped with outer raceway 14 with interior raceway 12 matched with, and cylindrical roller 8 can move between inner raceway 12 and outer raceway 14, the both ends of the inner wall of outer race 6 all be equipped with the seal groove 15 that is used for installing oil blanket 11, and it has lubricating grease to fill between oil blanket 11 and the seal groove 15.

In this embodiment, the oil seal 11 is made of FKM material.

In the present embodiment, the grease is perfluoropolyether grease.

In the embodiment, the inner ferrule 7 is a hollow structure, so that the overall weight is reduced.

The utility model discloses beneficial effect does:

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides an inner circle takes sealed cylindrical roller bearing of axle which characterized in that: the inner ring comprises a convex part arranged in the middle and shaft parts symmetrically arranged at two sides of the convex part, wherein the convex part and the shaft parts are arranged integrally, an inner roller path is arranged on the outer wall of the convex part, steps are arranged between the convex part and the shaft parts, the integral retainer is arranged at the position, corresponding to the inner roller path, of the outer side of the inner ring, a plurality of cylindrical rollers which are distributed along the circumferential direction at equal intervals are arranged on the integral retainer, the steps at two sides of the inner ring are provided with axial retainer rings which are embedded in an interference manner and used for limiting the axial direction of the cylindrical rollers, the outer ring is sleeved on the outer side of the inner ring, an outer roller path matched with the inner roller path is arranged at the middle position of the inner wall of the outer ring, the cylindrical rollers can move between the inner roller path and the outer roller path, and sealing grooves used for installing oil seals are arranged at two ends of the inner wall of the, and lubricating grease is filled between the oil seal and the seal groove.