CN201080968Y

CN201080968Y - Rolling bearing possessing expansion compensation resin ring

Info

Publication number: CN201080968Y
Application number: CNU2007200699581U
Authority: CN
Inventors: 郭长建
Original assignee: C&U Group Ltd
Current assignee: C&U Group Ltd
Priority date: 2007-05-18
Filing date: 2007-05-18
Publication date: 2008-07-02
Anticipated expiration: 2017-05-18

Abstract

The utility model relates to a rolling bearing with expansion compensation resin rings, comprising a bearing (1) and a bearing chamber (2), wherein, the bearing (1) contacts the bearing chamber (2); two resin rings (3) capable of internal injection molding of resin material chutes are arranged in the direction of an outside diameter of the bearing (1). The utility model has the advantages that: because two expansion compensation resin rings are arranged in the direction of the outside diameter of the bearing and special resin materials have a larger thermal expansion coefficient, expansion capacity of the resin rings can be larger than that of the bearing chamber when the bearing chamber is expanded once being heated, thereby occurrence of an operating slippage phenomenon of the bearing due to generation of a gap in the bearing chamber is avoided.

Description

The rolling bearing of band expansion compensation resin ring

Technical field

The utility model relates to a kind of rolling bearing, relates in particular to the structure between this rolling bearing middle (center) bearing external diameter and the bearing chamber.

Background technique

Rolling bearing will guarantee suitable installation precision and position stability when installing and using, not only need bearing bore diameter with axle suitable cooperating to be arranged, and also requires bearing outside diameter with the bearing chamber hole to be arranged suitable the cooperation.For the integrated type rolling bearing, bearing hole has the multiple matching relationship that cooperates with axle and bearing outside diameter with the bearing chamber hole, according to the bearing operation needs and consider the convenience of Bearing Installation dismounting, drive fit, transition fit, loose fit are arranged respectively, will guarantee that all bearing bore diameter or external diameter and fitting surface can not produce skidding but whatsoever cooperate.

For bearing bore diameter drive fit commonly used, bearing outside diameter is transition or loose fit, the skidding in bearing outside diameter and bearing chamber hole is a general and difficult problem, if bearing outside diameter cooperates tension, not only the trueness error of bearing chamber can be reflected to influences precision on the bearing outer ring, and can cause bearing mounting or dismounting difficulty, particularly in the environment of bearing working in temperature variation the time, take technical measures to guarantee that bearing has suitable cooperation to prevent because the bearing that causes greatly of rising of bearing chamber shrinkage temperature skids very necessaryly, is subjected to temperature variation more remarkable when particularly bearing chamber is for aluminum alloy material.

Summary of the invention

The utility model technical issues that need to address have provided a kind of rolling bearing with expansion compensation resin ring, are intended to solve the above problems.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

The utility model comprises: bearing and bearing chamber; Described bearing contacts with bearing chamber; The resin ring of casting resin material groove in described bearing outside diameter direction is settled two energy.

Compared with prior art, the beneficial effects of the utility model are: because the bearing outside diameter direction has been made the resin ring of two expansion compensations, be heated when swelling because this special resins material has bigger thermal expansion coefficient at bearing chamber, the swell increment of resin ring can cause the running skidding of bearing to produce thereby avoid producing in the bearing chamber gap greater than the swell increment of bearing chamber.

Description of drawings

Fig. 1 is the utility model structural drawing;

Fig. 2 is the enlarged view of Fig. 1 at the A place;

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

By Fig. 1, Fig. 2 as seen: the utility model comprises: bearing 1 and bearing chamber 2; Described bearing 1 contacts with bearing chamber 2; The resin ring 3 of casting resin material groove in described bearing 1 external diameter direction is settled two energy;

Described resin ring 3 has concentricity with bearing outside diameter, and resin ring and groove are fixed together;

The outside dimension D1 of described resin ring can be between 0.005-0.02cm greater than the size of bearing outside diameter D;

The utility model can prevent what bearing outside diameter from skidding.Usually bearing outside diameter all is the metal integral formula, meeting rising-heat contracting-cold when being subjected to temperature variation, when the bearing chamber material is that aluminum alloy and wall thickness are when suitable, bearing chamber diameter big amount many than bearing outside diameter of rising, the bearing external diameter rotation of will in bearing chamber, skidding in the running, along with the appearance frictional heating of the rotation phenomenon of skidding, skid and will aggravate and influence bearing operation because the abrasive dust that the wearing and tearing of skidding occur can enter in the bearing, cause bearing early failue.

The utility model is owing to made the resin ring of two expansion compensations in the bearing outside diameter direction, being heated at bearing chamber, (this resin has suitable thermal expansion coefficient and mechanical property owing to this special resins material when swelling, its mechanical property is near the performance index of nylon 66) have a bigger thermal expansion coefficient, the swell increment of resin ring can cause the running skidding of bearing to produce thereby avoid producing in the bearing chamber gap greater than the swell increment of bearing chamber.

In the bearing outside diameter direction two circular grooves are arranged, a kind of specific resin material in the injection moulding in the groove, the thermal expansion coefficient of this resin material is bigger than steel, the expanded by heating sensitivity.Resin ring external diameter after the injection moulding is through overground processing, resin ring outside dimension is slightly larger than the bearing outside diameter size, to guarantee also that simultaneously resin ring and bearing outside diameter have suitable concentricity, for guaranteeing that the resin ring has enough intensity, groove inner bottom part car at the resin ring has suitable groove, increases the join strength of resin ring.

The utility model is applicable to the structure of deep groove ball bearing.

Claims

1. the rolling bearing with expansion compensation resin ring comprises: bearing (1) and bearing chamber (2); Described bearing (1) contacts with bearing chamber (2); It is characterized in that: the resin ring (3) of casting resin material groove in described bearing (1) external diameter direction is settled two energy.

2. the rolling bearing of band expansion compensation resin ring according to claim 1 is characterized in that: described resin ring (3) has concentricity with bearing outside diameter, and resin ring and groove are fixed together.

3. the rolling bearing of band expansion compensation resin ring according to claim 1 and 2 is characterized in that: the outside dimension of described resin ring can be between 0.005-0.02cm greater than the size of bearing outside diameter.