CN204061566U - Rolling bearing - Google Patents

Abstract

The utility model provides a kind of rolling bearing, and it has: outer ring, and it has outer ring raceway on inner peripheral surface; Inner ring, it has inner ring raceway on outer circumferential face; Multiple rolling element, rolls and is located between these outer ring raceway and inner ring raceways freely; The groove of ring-type, is along the circumferential direction formed in the outer diameter face of outer ring; With the O type circle of ring-type, to be embedded in groove and its outer diameter face is given prominence to from described groove, the feature of this rolling bearing is, the internal diameter (D2) of O type circle, and outer ring outer diameter face in groove diameter (D1) between the relation of magnitude of interference be set as, meet 1.01≤D1/D2≤1.03.

Description

Rolling bearing

Technical field

The utility model relate to be used in fan electromotor etc., with chimeric with electric machine casing come the rolling bearing that uses of the purposes of rotation between the axle of supports fans motor etc. and electric machine casing.

Background technique

The outer ring of rolling bearing is fitted and fixed with the housing (electric machine casing) of collecting fan electromotor, and the running shaft of inner ring and fan electromotor is fitted and fixed with, and thus, between this axle and electric machine casing, supports in the mode that can be rotated by rolling bearing.

But, knownly can there is following phenomenon: in the outer ring of rolling bearing and the chimeric surface of electric machine casing, being fitted fixing outer ring can rotate (creep on the contrary to the sense of rotation of inner ring; Creep).If there is this creep, then can produce the abrasion of chimeric surface, damage the function of rolling bearing.

Model utility content

Therefore, the utility model is to provide for the purpose of a kind of rolling bearing, and this rolling bearing can alleviate creep torque when there is creep, and can suppress the generation of creep.

In order to realize this object, rolling bearing of the present utility model is formed as follows.

(1) rolling bearing, it has: outer ring, and it has outer ring raceway on inner peripheral surface; Inner ring, it has inner ring raceway on outer circumferential face; Multiple rolling element, rolls and is located between these outer ring raceway and inner ring raceways freely; The groove of ring-type, is along the circumferential direction formed in the outer diameter face of described outer ring; With the O type circle of ring-type, to be embedded in described groove and its outer diameter face is given prominence to from described groove, the feature of this rolling bearing is,

The internal diameter (D2) of described O type circle, and described outer ring outer diameter face in groove diameter (D1) between the relation of magnitude of interference be set as, meet 1.01≤D1/D2≤1.03.

(2) in the rolling bearing described in (1), described O type circle is set as 15% ~ 22% of the wire diameter (d) of this O type circle from the overhang (L) that described groove is outstanding.

Rolling bearing of the present utility model is configured to, and the bottom surface of the groove in the outer diameter face of O type circle and outer ring is firmly fastened to.Thus, even if when having acted on unbalanced rotation load on bearing, be also not easy to produce the creep between the groove in the outer diameter face of O type circle and outer ring, and stable creep-resistant property can have been maintained.Therefore, the utility model provides a kind of rolling bearing, and it by preventing from producing creep between the groove installed for O type circle and O type circle, and can play creep preventing effectiveness steady in a long-term.

Accompanying drawing explanation

Fig. 1 is the sectional view of the formation of the rolling bearing representing the utility model mode of execution.

Fig. 2 is the partial enlarged drawing of the outside diameter of the outer ring of the utility model mode of execution.

Embodiment

Below, based on Fig. 1 and Fig. 2, mode of execution of the present utility model is described.

In the rolling bearing of Fig. 1, be assembled with: outer ring 10, it has outer ring raceway 11 on inner peripheral surface; Inner ring 20, it has inner ring raceway 21 on outer circumferential face; Multiple rolling element 40, rolls and is located between these outer ring raceway 11 and inner ring raceways 21 freely; Retainer 41, equally spaced keeps rolling element 40; With sealed department material 42, for the side at bearing between outer ring 10 and above-mentioned inner ring 20, Bearing inner is sealed.

The rolling bearing of the present embodiment and the Qian He of electric machine casing can set neatly according to situation when assembling, as the rolling bearing of free side, and also can by can free-moving mode be fitted together to vertically.

In addition, the rolling bearing of Fig. 1 also has: the groove 12 of ring-type, is along the circumferential direction formed in the outer diameter face 13 of outer ring 10; With the O type circle 30 of ring-type, to be embedded in groove 12 and its outer diameter face is given prominence to from above-mentioned groove 12.

In the present embodiment, the internal diameter (D2) of O type circle 30, and outer ring 10 outer diameter face 13 in groove 12 diameter (D1) between the relation of magnitude of interference be set as, meet 1.01≤D1/D2≤1.03.In addition, using the wire diameter of O type circle 30 as d, and using O type circle 30 from the outstanding amount (overhang) of the outer diameter face 13 of outer ring 10 as L time, be preferably set to, [L/d] is in the scope of 15% ~ 20%.By [L/d] is set as 15% ~ 20%, and the stronger creep resistance (rebounding force of rubber) of the relative rotation overcoming creep can be produced, further, can suppress based on harmful effect when making the rolling bearing of free side be difficult to the mobile assembling caused vertically because overhang is excessive.

Therefore, in the rolling bearing of the present embodiment, O type circle 30 uprises with the creep resistance of the internal surface S of groove 12, therefore, it is possible to prevent the creep between O type circle 30 and the internal surface S of groove 12, and can guarantee sufficient creep-resistant property.

Claims (2)

1. a rolling bearing, it has:

Outer ring, it has outer ring raceway on inner peripheral surface;

Inner ring, it has inner ring raceway on outer circumferential face;

Multiple rolling element, rolls and is located between these outer ring raceway and inner ring raceways freely;

The groove of ring-type, is along the circumferential direction formed in the outer diameter face of described outer ring; With

The O type circle of ring-type, is embedded in described groove and its outer diameter face is given prominence to from described groove, and the feature of this rolling bearing is,

The internal diameter (D2) of described O type circle, and described outer ring outer diameter face in groove diameter (D1) between the relation of magnitude of interference be set as, meet 1.01≤D1/D2≤1.03.

2. rolling bearing according to claim 1, is characterized in that,

Described O type circle is set as 15% ~ 22% of the wire diameter (d) of this O type circle from the overhang (L) that described groove is outstanding.