CN206723257U

CN206723257U - A kind of roller bearing for forklift door frame

Info

Publication number: CN206723257U
Application number: CN201720412393.6U
Authority: CN
Inventors: 王启民; 朱伟
Original assignee: JIANGSU CCVI BEARING CO Ltd
Current assignee: JIANGSU CCVI BEARING CO Ltd
Priority date: 2017-04-19
Filing date: 2017-04-19
Publication date: 2017-12-08
Anticipated expiration: 2027-04-19

Abstract

A kind of roller bearing for forklift door frame, it is related to a kind of technical field of logistics machinery roller bearing.The each outer ring raceway of the utility model only has a camber line on bearing cross section, each bear inner ring grooved railway includes the first camber line and the second camber line on bearing cross section, and the ratio of bear inner ring grooved railway diameter of the radius of curvature of any camber line and ball on cross section is 0.5~0.58.The utility model can not only bear bigger radial load under equivalent specifications size, moreover it is possible to bear axial load, integral inner ring designs the intensity for enhancing inner ring rib, avoids the leakage of lubricant medium and the entrance of foreign matter, ensure that the lubricating condition of rolling element.

Description

A kind of roller bearing for forklift door frame

Technical field

A kind of technical field of logistics machinery roller bearing is the utility model is related to, it is more particularly to a kind of to be used for fork truck door The technical field of frame roller bearing.

Background technology

The bearing being commonly used at present all includes bearing inner race, outer ring, rolling element and retainer.Rolling element is placed on guarantor Hold in frame, it is evenly spaced to be kept frame, and is located between bearing inner race and outer ring, and annular channel is provided with inner ring and outer ring, The section of annular channel is a circular arc, or the composite curve for a circular arc and a straight line, and annular channel cross section profile circular arc Radius be more than the radius of rolling element, rolling element is that any is contacted respectively with inner ring and outer ring during stand under load.This bearing can only be held The radial load received, the bearing capacity of axial load are almost nil.The service life of these standard rolling bearings tends not to satisfaction i.e. It is required that bearing physical dimension is small, the requirement of large carrying capacity.

In the load-bearing capacity deficiency of single-row ball-bearing, generally use two-row ball bearing（See Fig. 1 and Fig. 2）, double row ball integral The radial load bigger than single-row ball-bearing can be born by holding, moreover it is possible to bear certain axial load.But when double row ball integral is carried During used in logistics machinery structure, outer ring rotation, inner ring is fixed, and tends to occur inner ring the fatigue even situation of fracture failure.

A kind of two-row ball bearing disclosed in the U of Chinese patent CN 205207422 and the rolling for including the two-row ball bearing Wheel, wherein, described two-row ball bearing includes：Outer ring, two outer rings, be arranged between outer ring and inner ring can free rolling two Row ball.Its deficiency is that described two inner rings are spaced vertically, and the two inner rings design of separation spacing each other causes inner ring to keep off Side thinner thickness, rib intensity is relatively low, is easily deformed generation initial failure during stress.Simultaneously because have gap between inner ring, this Lubricant medium in sample injection bearing is easily lost in transport or running out of two in ring gap, causes bearing transporting Middle pollution packing material, cause bearing initial failure because lubricating grease loss or foreign matter enter in operation.If two inner rings are locked Tightly, bearing clearance can be eliminated, and bearing can fail because stuck.

The content of the invention

The purpose of this utility model is to provide a kind of roller bearing for forklift door frame, in equivalent specifications size Under, bigger radial load can not only be born, moreover it is possible to bear axial load, integral inner ring design enhances the strong of inner ring rib Degree, avoids the leakage of lubricant medium and the entrance of foreign matter, ensure that the lubricating condition of rolling element.

A kind of roller bearing for forklift door frame, it is arranged in two row balls between bearing outer ring and bearing inner race, two Individual retainer and two sealing rings, the inner peripheral surface of bearing outer ring are provided with two outer ring raceway, the inner peripheral surface of bearing inner race Two bear inner ring grooved railway are provided with, a row ball is set between corresponding outer ring raceway and a bear inner ring grooved railway；It is each to keep Frame is provided with several recesses, and the recess is circumferentially spaced ball, and sealing ring is arranged on bearing both sides；Each outer ring raceway There was only a camber line on bearing cross section, each bear inner ring grooved railway includes the first camber line and the second camber line on bearing cross section, The ratio of bear inner ring grooved railway diameter of the radius of curvature of any camber line and ball on cross section is 0.5~0.58.

It is preferable to, the radius of curvature of the utility model outer ring raceway camber line and the ratio of bulb diameter be 0.505~ 0.550。

It is preferable to the radius of curvature of the camber line of the utility model bear inner ring grooved railway first and the ratio of bulb diameter are 0.505 ~0.550.

It is preferable to the radius of curvature of the camber line of the utility model bear inner ring grooved railway second and the ratio of bulb diameter are 0.505 ~0.550.

It is preferable to line and the radial direction of the contact point and ball center of the camber line of the utility model bear inner ring grooved railway first and ball The angle of axis is between 10 degree to 60 degree.

It is preferable to line and the radial direction of the contact point and ball center of the camber line of the utility model bear inner ring grooved railway second and ball The angle of axis is between 10 degree to 60 degree.

In the application of a logistics machinery roller bearing, bearing inner race is fixed, outer ring rotation.Bearing failure mostly occur for Inner ring fatigue failure.Compared with the two-row ball bearing of generally use, roller bearing of the present utility model, each bear inner ring grooved railway with it is every There are two contact points between individual ball, therefore the power suffered by inner ring is dispersed on four contact points, inner ring contact point institute is loaded Diminish, reduce the contact stress of inner ring, so as to improve the fatigue life of bearing.

The utility model roller bearing, certain gap between ball and bear inner ring grooved railway be present, lubricating oil or fat can be easy Lubricating condition when ground enters gap so as to improve operating, inner ring is overall structure, and lubricating oil or lubricating grease not easily run off, and is improved The fatigue life of bearing.

Brief description of the drawings

Fig. 1 is the structure sectional view of conventional double-row angular contact bal bearing.

Fig. 2 is the structure sectional view of conventional double-row angular contact bal bearing.

Fig. 3 is the structure sectional view of roller bearing of the present utility model.

Fig. 4 is the partial detailed sectional diagram of roller bearing bear inner ring grooved railway of the present utility model.

Embodiment

The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings：

As shown in figure 3, a kind of roller bearing for forklift door frame, including：Bearing outer ring 1, inner ring 2, two row balls 3, Two retainers 4 and two sealing rings 5.The inner peripheral surface of outer ring 1 is provided with two raceway grooves, and the inner peripheral surface of inner ring 2 is provided with Two raceway grooves, each column of two row ball 3 are put between an outer ring raceway and a bear inner ring grooved railway respectively.Two retainers 3 are each protected Hold frame and be provided with multiple recesses, the recess is circumferentially spaced ball, and sealing ring 5 is arranged on bearing both sides.

The material of outer ring 1 and ball 3 uses iron-based material（Such as high-carbon-chromium bearing steel or carburizing bearing steel）.Inner ring 2 uses Carburizing bearing steel, to improve the impact resistance ability of inner ring and anti-fatigue ability.Outer ring and inner peripheral surface are using surface treatment（Such as Zinc-cobalt alloy, zinc-iron alloy or admiro or spraying molybdenum disulfide etc.）.And retainer 4 can use resin material（Such as polyamides Amine 66）Or metal material（Such as mild steel, brass etc.）.

In this example, as shown in Figure 3, Figure 4, each outer ring raceway and ball only have a contact point, now outer ring raceway Camber line radius of curvature R o is more than the radius R of ball, ball and the mere contact point of outer ring raceway and the line and longitudinal axis of ball center Overlap, therefore contact angle is 0 degree.

In the present embodiment, as shown in Figure 3, Figure 4, two camber lines, the first arc are included on the cross section of each bear inner ring grooved railway Curvature of a curve radius is R1, and the radius of curvature of the second camber line is the radius R that R2, R1 and R2 are both greater than ball.

In the present embodiment, R1 and bulb diameter D（2R）Ratio be more than 0.5, preferably greater than 0.5 and less than 0.58, more It is preferred that between 0.505 to 0.55.R2 and bulb diameter D（2R）Ratio be more than 0.5, preferably greater than 0.5 and less than 0.58, more It is preferred that between 0.505 to 0.55.

Therefore bear inner ring grooved railway and ball are two contact points, and the contact angle of the first camber line and ball is α 1, the second camber line and ball Contact angle be α 2.

The contact angle α 1 of the camber line of bear inner ring grooved railway first and ball is more than 0 degree and less than 90 degree, preferably at 10 degree to 60 degree Between, more preferably between 18 degree to 40 degree.The contact angle α 2 of the camber line of bear inner ring grooved railway second and ball is more than 0 degree and less than 90 Degree, preferably between 10 degree to 60 degree, more preferably between 18 degree to 40 degree.

Two raceway diameter differences on outer ring 1 are basically identical, and two raceway diameter differences on inner ring 2 are basically identical, so It is easy to the processing of bearing so that the end-play value of two raceway grooves of bearing is of substantially equal, so extends the service life of bearing.

Sealing ring is arranged on the both sides of bearing in this example, can prevent the leakage of lubricating oil or lubricating grease and prevent Environmental contaminants enter Bearing inner, and the inner space of bearing fills a certain amount of lubricating oil or lubricating grease, has two on inner ring 2 Raceway groove, certain gap between ball and bear inner ring grooved railway be present, lubricating oil or lubricating grease can be accommodated, so as to improve the profit of bearing It is sliding.

Claims

1. a kind of roller bearing for forklift door frame, it is arranged in bearing outer ring（1）And bearing inner race（2）Between two row balls （3）, two retainers（4）With two sealing rings（5）, bearing outer ring（1）Inner peripheral surface be provided with two outer ring raceway, bearing Inner ring（2）Inner peripheral surface be provided with two bear inner ring grooved railway, set between corresponding outer ring raceway and a bear inner ring grooved railway Put a row ball（3）；Each retainer（4）Several recesses are provided with, the recess is ball（3）It is circumferentially spaced, sealing ring （5）It is arranged on bearing both sides；It is characterized in that each outer ring raceway only has a camber line, each inner ring ditch on bearing cross section Road includes the first camber line and the second camber line on bearing cross section, bear inner ring grooved railway on cross section the radius of curvature of any camber line and Ball（3）Diameter ratio be 0.5~0.58.

2. the roller bearing according to claim 1 for forklift door frame, it is characterised in that above-mentioned outer ring raceway camber line Radius of curvature and bulb diameter ratio be 0.505~0.550.

3. the roller bearing according to claim 1 for forklift door frame, it is characterised in that above-mentioned bear inner ring grooved railway first The radius of curvature of camber line and the ratio of bulb diameter are 0.505~0.550.

4. the roller bearing according to claim 1 for forklift door frame, it is characterised in that above-mentioned bear inner ring grooved railway second The radius of curvature of camber line and the ratio of bulb diameter are 0.505~0.550.

5. the roller bearing according to claim 1 for forklift door frame, it is characterised in that above-mentioned bear inner ring grooved railway first The line of the contact point and ball center of camber line and ball and the angle of longitudinal axis are between 10 degree to 60 degree.

6. the roller bearing according to claim 5 for forklift door frame, it is characterised in that above-mentioned angle at 18 degree extremely Between 40 degree.

7. the roller bearing according to claim 1 for forklift door frame, it is characterised in that above-mentioned bear inner ring grooved railway second The line of the contact point and ball center of camber line and ball and the angle of longitudinal axis are between 10 degree to 60 degree.

8. the roller bearing according to claim 7 for forklift door frame, it is characterised in that above-mentioned angle at 18 degree extremely Between 40 degree.