CN205260646U - Roller bearing - Google Patents

Abstract

The utility model provides a roller bearing, roller bearing includes the outer loop, an inner ring, a plurality of rolling elements and seal part, the inner surface of outer loop is equipped with outer loop roller path groove, endocyclic outer diametral plane is equipped with follows the inner ring roller path groove who radially corresponds with outer loop roller path groove, be equipped with the rolling element between outer loop roller path groove and the inner ring roller path groove, outer loop roller path groove is equipped with the endless groove respectively with inner ring roller path groove's both sides, seal part's external diameter portion inlays and locates in the endless groove, seal part's internal diameter portion is equipped with contact -type sealing epipharynx inwards, the contact -type sealing epipharynx contacts with the endless groove and forms the sealed face of endless groove, the ratio of curvature of the wide front end with the contact -type sealing epipharynx of the neck of seal part's internal diameter portion is 5~7. The utility model discloses under the court's inside seal epipharynx magnitude of interference circumstances that does not reduce seal part, reducible roller bearing's frictional force to thereby make reduction starting torque have better rotational speed and efficiency, and have better leakproofness concurrently.

Description

Rolling bearing

Technical field

The utility model relates to a kind of rolling bearing, particularly a kind of sealed rolling bearing.

Background technology

Because of greenhouse effects impacts, the environmental consciousness of various countries comes back in recent years, to reduce the energy use amount andThe service efficiency that improves the energy has higher requirement, for bearing, for reaching above-mentioned requirements, therefore have lowThe sealed rolling bearing demand of torque.

Existing associated sealing arrangement for bearings, comprises bearing and seal member. Bearing comprises outer shroud, interior ring and manyIndividual ball, the outer diametric plane of the aperture surface of outer shroud and interior ring is equipped with raceway groove, ball be located at two raceway grooves itBetween, the both sides of the raceway groove of the aperture surface of outer shroud are respectively equipped with seal groove. Seal member adopts contact closeEnvelope parts, its shape is generally annular plate. The outer diameter part of seal member is embedded in seal groove, sealingThe outer diametric plane interference fit that seals epipharynx and bearing inner ring inwardly of the inside diameter of part, forms Elastic Contact,Thereby bearing is sealed.

But, the above-mentioned existing sealed rolling bearing that utilizes seal member to come sealed bearing inside exist withLower defect: for avoiding rainwater or muddy water to immerse, and increase the epipharynx of the sealing inwardly magnitude of interference of seal member,But also increase and affect rotating speed and usefulness increasing the frictional force of rear rolling bearing.

Utility model content

The technical problems to be solved in the utility model is to be raising in order to overcome rolling bearing in prior artSealing and increase the epipharynx of the sealing inwardly magnitude of interference of seal member, but in the friction that increases rear rolling bearingPower also increases and affects the defect of rotating speed and usefulness, and a kind of rolling bearing is provided.

The utility model is to solve above-mentioned technical problem by following technical proposals:

A kind of rolling bearing, described rolling bearing comprises outer shroud, interior ring, some rolling elements and seal member,The aperture surface of described outer shroud is provided with outer-race ball track groove, and the outer diametric plane of described interior ring is provided with and described outer-race ball trackThe inner race groove that groove is radially corresponding, is provided with institute between described outer-race ball track groove and described inner race grooveState rolling element, the both sides of described outer-race ball track groove and described inner race groove are respectively equipped with endless groove, described inThe outer diameter part of seal member is embedded in described endless groove, and the inside diameter of described seal member is provided with inwardlyContact seal epipharynx, described contact seal epipharynx contacts with described endless groove and forms endless groove sealingFace, its feature is, the neck of the inside diameter of described seal member is wide and described contact seal epipharynxThe ratio of curvature of front end is 5～7.

Preferably, the front end of the wide and described contact seal epipharynx of the neck of the inside diameter of described seal memberRatio of curvature be 6.

Preferably, between described outer-race ball track groove and described inner race groove, be provided with for limiting described rollingThe retainer of the skew of body.

Preferably, described contact seal epipharynx and described endless groove sealing surface are Elastic Contact.

Preferably, the inside of described seal member is provided with the sealing central layer for reinforcing.

In this programme, described sealing central layer makes the structure of described seal member more firm, and improves instituteState the service life of seal member.

Meeting on the basis of this area general knowledge, above-mentioned each optimum condition, can be combined, and obtains this realityBy novel each preferred embodiments.

Positive progressive effect of the present utility model is:

The utility model, in the epipharynx of the sealing inwardly magnitude of interference situation that does not reduce seal member, can reduce and rollThe frictional force of dynamic bearing, thus good rotating speed and usefulness there is to make reducing detent torque, and have concurrentlySealing preferably.

Brief description of the drawings

Fig. 1 is the structural representation of the rolling bearing of the utility model preferred embodiment.

Fig. 2 is the structural representation that amplify the part of contact seal epipharynx in Fig. 1.

Description of reference numerals:

Outer shroud 1

Interior ring 2

Rolling element 3

Retainer 4

Seal member 5

Outer shroud seal groove 6

Interior ring seal groove 7

The neck of the inside diameter of seal member is wide by 8

The curvature 9 of the front end of contact seal epipharynx

Magnitude of interference δ

Detailed description of the invention

Lift a preferred embodiment below, and carry out by reference to the accompanying drawings the clearer the utility model that intactly illustrates.

Embodiment

As shown in Figure 1, the present embodiment provides a kind of rolling bearing, described rolling bearing comprise outer shroud 1,Interior ring 2, some rolling elements 3, some retainers 4 and seal member 5;

The aperture surface of outer shroud 1 is provided with outer-race ball track groove, and the outer diametric plane of interior ring 2 is provided with and described outer-race ball trackThe inner race groove that groove is radially corresponding, the both sides of described outer-race ball track groove and described inner race groove respectivelyBe provided with endless groove;

Between described outer-race ball track groove and described inner race groove, be provided with rolling element 3, retainer 4 correspondencesRolling element 3 and be located at described outer-race ball track groove and described inner race groove between, retainer 4 for restrictionThe skew of rolling element 3;

Seal member 5 is embedded among described endless groove, and the outer diameter part of seal member 5 is entrenched in outer shroud 1Endless groove in, the inside diameter of seal member 5 is provided with contact seal epipharynx inwardly, described contactThe endless groove Elastic Contact of sealing epipharynx and inner race groove, contact-making surface is endless groove sealing surface, sealingThe inside of part 5 is provided with the sealing central layer for reinforcing.

As shown in Figure 2, by wide the neck of the inside diameter of seal member 8 with the front end of contact seal epipharynxThe ratio of curvature 9 be controlled between 5～7, magnitude of interference δ represents endless groove and the contact of inner race grooveThe magnitude of interference of sealing epipharynx.

The curvature 9 of the neck wide 8 of the inside diameter of control seal member and the front end of contact seal epipharynxRatio, between the endless groove to the inner race groove under identical magnitude of interference δ and contact seal epipharynxFrictional force has a great impact.

The neck wide 8 of the inside diameter of seal member exists with the ratio of the curvature 9 of the front end of contact seal epipharynxOutside 5～7 time, rubbing can cause the endless groove of inner race groove and contact seal epipharynx interference fit timeWiping power rises, by excessive the detent torque that the there will be rolling bearing loss problem that causes rotating speed and efficiency.

Therefore, in the present embodiment, by wide the neck of the inside diameter of seal member 8 with contact seal inThe ratio of the curvature 9 of the front end of lip is controlled between 5～7, and the endless groove of inner race groove and contactSealing epipharynx interference fit, like this, in the time of interior ring High Rotation Speed, the endless groove of inner race groove with contactBetween formula sealing epipharynx, produce compared with low-frictional force, the detent torque of rolling bearing is reduced, therefore can obtainA kind of rolling bearing with excellent sealing and detent torque.

Effect embodiment

In this effect embodiment, 3 old-fashioned seal member (necks of the inside diameter of seal member are chosenThe ratio of the curvature 9 of the wide front end with contact seal epipharynx of portion is outside 5～7 scopes) and 5 new-type sealings(ratio of the curvature 9 of the wide front end with contact seal epipharynx of the neck of the inside diameter of seal member exists partsIn 5～7 scopes), adopt totally 8 rolling bearings of two patterns to carry out torque evaluation test, obtain respectivelyThe result of table 1 and table 2.

Detent torque test is as shown in table 1, applies the axial force of 6kg to test rolling bearing, and with speedDegree 5rpm starts to measure the friction torque value of test rolling bearing, and subjects is to adopt and compile in table 1The rolling bearing of number 1～8 seal member.

Table 1 detent torque test card

Continuous torque test is as shown in table 2, applies the axial force of 6kg to test rolling bearing, and with speedDegree 1800rpm continuous operation is measured the friction torque value of test rolling bearing, and subjects is table 2The rolling bearing of the seal member of middle employing numbering 1～8.

Table 2 continuous torque test card

Wherein, gf.cm is the dimension of moment, i.e. ox. rice, 1gf.cm=0.0001Nm.

From torque test, 4～8 excellences of new-type seal member are in old-fashioned seal member 1～3.

In the new-type seal member of test, adopt the startup of the rolling bearing of the seal member that is numbered 4Torque value is all low than other test rolling bearings with continuous torque value. Therefore, when the inside diameter of seal memberThe ratio of curvature 9 of the wide front end with contact seal epipharynx of neck be 6 o'clock, rolling bearing has betterEffect.

Can learn thus, before the neck wide 8 of the inside diameter by seal member and contact seal epipharynxThe ratio of the curvature 9 of end is controlled between 5～7, can obtain one and can effectively reduce detent torque and companyThe sealed rolling bearing of continuous torque.

In addition, showing in the present embodiment rolling element is single-row rolling bearing, but is not limited to this kindRolling bearing for example, can be also that rolling element is the rolling bearing of biserial.

Although more than described detailed description of the invention of the present utility model, those skilled in the art shouldWork as understanding, this only illustrates, and protection domain of the present utility model is to be limited by appended claims. Those skilled in the art is not deviating under the prerequisite of principle of the present utility model and essence, can be rightThese embodiments are made various changes or modifications, but these changes and amendment all fall into of the present utility modelProtection domain.

Claims (5)

1. a rolling bearing, it comprises outer shroud, interior ring, some rolling elements and seal member, described inThe aperture surface of outer shroud is provided with outer-race ball track groove, and the outer diametric plane of described interior ring is provided with and described outer-race ball track groove edgeRadially corresponding inner race groove, rolls described in being provided with between described outer-race ball track groove and described inner race grooveKinetoplast, the both sides of described outer-race ball track groove and described inner race groove are respectively equipped with endless groove, described sealingThe outer diameter part of parts is embedded in described endless groove, and the inside diameter of described seal member is provided with contact inwardlyFormula sealing epipharynx, described contact seal epipharynx contacts with described endless groove and forms endless groove sealing surface,It is characterized in that the front end of the wide and described contact seal epipharynx of the neck of the inside diameter of described seal memberRatio of curvature be 5～7.

2. rolling bearing as claimed in claim 1, is characterized in that, the internal diameter of described seal memberThe ratio of curvature of the front end of the wide and described contact seal epipharynx of the neck of portion is 6.

3. rolling bearing as claimed in claim 1, is characterized in that, described outer-race ball track groove and instituteState the retainer that is provided with the skew for limiting described rolling element between inner race groove.

4. rolling bearing as claimed in claim 1, is characterized in that, described contact seal epipharynxWith described endless groove sealing surface be Elastic Contact.

5. the rolling bearing as described in any one in claim 1～4, is characterized in that, described closeThe inside of envelope parts is provided with the sealing central layer for reinforcing.