CN209370289U - A kind of four-point contact ball device - Google Patents

Abstract

A kind of four-point contact ball device, including outer ring and inner ring, retainer is equipped between the inner ring and outer ring, retainer is equipped with circular through hole, steel ball is equipped in circular through hole, steel ball is contacted with the inner side end of inner ring and outer ring respectively, is located on the inner side end of the inner ring and outer ring and is equipped with rounding arc angle at the contact point of steel ball.Which solves bearings online in use, the effective stationary balls of retainer move in a circle, in the case where retainer and Internal and external cycle are not interfered, by retainer by designing to greatest extent, it is ensured that the intensity of retainer solves frequent deformation breakage problem, extend bearing life, improves operating rate.

Description

A kind of four-point contact ball device

Technical field

The utility model relates to a kind of four-point contact ball devices.

Background technique

Four-point contact ball (hereinafter referred to as bearing) is that metallurgy industry and non-ferrous metal calendering industry use, all kinds of milling trains Most widely used a kind of bearing in roll bearing bearing.It is in four point contacts between bearing steel ball and Internal and external cycle, can bears any The axial load in direction or radially, axially joint load.The type can limit axis or the two sides axial displacement of shell exists Within the scope of the end-play of bearing.The type bearing is axial when radial internal clearance is identical compared with deep groove ball bearing, gap compared with It is small, and axial load is larger, limit speed is higher.

It is in four point contacts between steel ball and lasso in the effect of purely radial load；Purely axial load effect under, steel ball with It is two-point contact between lasso.It just can guarantee normal work when this bearing only forms two-point contact.

Existing production line of bar finishing mill uses double semi outer rings form four-point contact ball, intrinsic four-point contact ball Bearing block frequently has copper powder failure to bearing arrangement during the rolling process, and bearing block temperature increases, and eventually leads to bearing failure.Through pair Faulty bearings seat statistical analysis, failure are caused by retainer deformation fracture, and original design bearing retainer includes steel ball at middle part, are protected Hold frame width 30mm, thickness 10mm, double semi outer rings and the non-chamfering in steel ball contact point.Bearing at runtime by roll pass dislocation, Rolling mill universal section vibration etc. influences, and retainer swings up and down steel ball and moves in a circle card resistance, and double semi outer rings squeeze steel ball and holding Frame accelerates retainer deformation, and rolling assembly, which further rubs to run, will make retainer deformation fracture, causes bearing failure.Because of copper The problem of retainer breaking strain, bearing was scrapped in advance, and the interim roll change of need, rolling mill bearing life is short, causes centainly to Rolling production Influence.

Utility model content

Its purpose of the utility model, which is that, provides a kind of four-point contact ball device, and solve existing bearing makes online Used time frequently deforms breakage problem, extends bearing life, improves operating rate.

It adopts the technical scheme that achieve the above object, a kind of four-point contact ball device, including outer ring and interior It encloses, retainer is equipped between the inner ring and outer ring, retainer is equipped with circular through hole, is equipped with steel ball, steel ball in circular through hole Contacted respectively with the inner side end of inner ring and outer ring, on the inner side end of the inner ring and outer ring be located at at the contact point of steel ball It is equipped with rounding arc angle.

Beneficial effect

The utility model has the following advantages that compared with prior art.

The utility model has the advantages that it is online in use, the effective stationary balls of retainer do circle to solve existing bearing Zhou Yundong, in the case where retainer and Internal and external cycle are not interfered, by retainer by designing to greatest extent, it is ensured that retainer it is strong Degree solves frequent deformation breakage problem, extends bearing life, improve operating rate.

Detailed description of the invention

Below in conjunction with attached drawing, the utility model is described in further detail.

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the structural schematic diagram of retainer in the utility model；

Fig. 3 is structural schematic diagram of the retainer in conjunction with steel ball in the utility model.

Specific embodiment

With reference to the accompanying drawing, the utility model is further described.

The present apparatus includes that outer ring 3 and inner ring 1 are equipped with retainer 2 as shown in Figure 1-Figure 3 between the inner ring 1 and outer ring 3, Retainer 2 is equipped with circular through hole 5, is equipped with steel ball 4 in circular through hole 5, the inner side end with inner ring 1 and outer ring 3 respectively of steel ball 4 It is located on the inner side end of contact, the inner ring 1 and outer ring 3 and is equipped with rounding arc angle 6 at the contact point of steel ball 4.

In the specific implementation, the frame width design of the retainer 2 is 40mm, thickness design 12mm to the utility model； The contact point of outer ring 3 and inner ring 1 and steel ball 4 is set into rounding arc angle 6 respectively；4 diameter of steel ball is 22.225mm, can be effective Stationary balls 4 do stable operation, another retainer 2 is widened so that intensity is kept to improve, the frequency of effective solution retainer 2 Numerous deformation breakage problem, can reduce bearing moon quantity consumed.

Claims (1)

1. a kind of four-point contact ball device, including outer ring (3) and inner ring (1), set between the inner ring (1) and outer ring (3) Have retainer (2), retainer (2) is equipped with circular through hole (5), be equipped with steel ball (4) in circular through hole (5), steel ball (4) respectively with Inner ring (1) and the inner side end of outer ring (3) contact, which is characterized in that the inner side end of the inner ring (1) and outer ring (3) is upper In be equipped with rounding arc angle (6) at the contact point of steel ball (4).