CN204458815U - For the ball bearing of high-speed servo motor - Google Patents

Abstract

The utility model provides a kind of ball bearing for high-speed servo motor, it includes inner ring, outer ring, ball and retainer, outer ring, inner ring are provided with outer ring raceway and bear inner ring grooved railway, outward, inner ring in opposite directions and clamping ball in outer ring raceway and bear inner ring grooved railway,, inner ring is respectively arranged with resist delamination outward, the resist delamination position corresponding with bear inner ring grooved railway and outer ring raceway is provided with anticreep mouth; The coefficient of curvature of bear inner ring grooved railway is 1.04 ~ 1.05, and the coefficient of curvature of outer ring raceway is that the waviness of 1.06 ~ 1.07 bear inner ring grooved railway and outer ring raceway is all less than 1.0 μm.Area of contact is reduced by the coefficient of curvature increase increasing inside and outside circle raceway groove itself, reduce the temperature rising that frictional heating causes, improve waviness, improve bearing rotational stability, bearing is in good lubrication state, also can reduce the temperature rising that frictional heating causes.By arranging resist delamination on inner ring and outer ring, make ball difficult drop-off.

Description

For the ball bearing of high-speed servo motor

Technical field

The utility model relates to a kind of ball bearing, particularly a kind of ball bearing for high-speed servo motor.

Background technique

Bearing is in order to supporting and positioning rotating shaft, the rotational motion expected can be done to make it, bearing generally can be divided into sliding bearing or rolling bearing, face contact movement is done in sliding bearing and rotating shaft, and rolling bearing and rotating shaft are done a little or linear contact lay moves, generally speaking, because the area of contact of rolling bearing is little, admittedly have more smooth action effect.Rolling bearing is widely used between various motor, to rotate.Rolling bearing comprises the assemblies such as inner ring, outer ring, rolling element, retainer, and rolling element is arranged between outer ring and inner ring, and is located to carry out roll rotational by retainer.Rolling bearing is generally categorized as ball bearing, needle bearing or roller bearing with rolling element pattern, with ball bearing, can insert appropriate lubricant body, it can be lubricant oil or lubricating grease, lubricant body is spread evenly across rolling element surface to reduce surface friction drag, guarantees that rolling bearing runs well.

At present, ball bearing is in operation process, and rolling element and Internal and external cycle raceway groove respectively form an Elliptical Contacts area, and groove curvature value is generally between 1.02 ~ 1.04, rotating speed per minute to turn left the right side about several thousand, and raceway groove circle waviness (Waviness) is between 1.0 ~ 5.0 μm.Because high-speed servo motor rotary speed is very high, high rotating speed causes ball centrifugal force to increase, centrifugal force is directly proportional to rolling element velocity squared again, rolling element and raceway groove area of contact is caused to become large at high speed, cause bearing rotational temperature higher, too high temperature rise will cause consistent lubricant deterioration and lubrication failure, final burn-out of bearing.On the other hand, if curvature value is excessive, although area of contact can be reduced to reduce bearing rotational temperature, but can cause in ball rotation process unstable, ball and raceway groove is caused to produce to slide and wear away, in addition raceway groove circle waviness (Waviness) is excessive, also to cause in ball rotation process unstable, reduces bearing working life.

Model utility content

The technical problems to be solved in the utility model rotates the higher defect of temperature rise to overcome prior art bearing, provides a kind of and rotate the lower and ball bearing for high-speed servo motor of ball difficult drop-off of temperature rise.

The utility model solves above-mentioned technical problem by following technical proposals:

A kind of ball bearing for high-speed motor, it includes an inner ring, one outer ring, one ball and a retainer, described outer ring and described inner ring are respectively arranged with an outer ring raceway and a bear inner ring grooved railway, described outer ring and described inner ring in opposite directions and the described ball of the clamping of activity in described outer ring raceway and described bear inner ring grooved railway, its feature is, described outer ring and described inner ring are respectively arranged with a resist delamination, the described resist delamination position corresponding with described bear inner ring grooved railway and described outer ring raceway is provided with the anticreep mouth smoothly docked with described bear inner ring grooved railway and described outer ring raceway.

The coefficient of curvature of described bear inner ring grooved railway is 1.04 ~ 1.05, and the coefficient of curvature of described outer ring raceway is 1.06 ~ 1.07.

The waviness of described bear inner ring grooved railway and described outer ring raceway is all less than 1.0 μm.

That is, resist delamination is equivalent to the degree of depth of having deepened raceway groove on inner ring, outer ring, makes ball more difficult drop-off; On the other hand, the coefficient of curvature of inner ring, outer ring raceway itself is increased, the area of contact of inner ring, outer ring raceway and ball can be reduced, make the temperature rise that reduction frictional heating causes.Improve simultaneously waviness below 1.0 μm significantly lift shaft forward dynamic stability, bearing is in good lubrication state, also can reduce the temperature that frictional heating causes and rise

Preferably, described resist delamination is made up of Ni-based oxidation-resistant alloy.Herein, the rigidity of Ni-based oxidation-resistant alloy and heat-conducting property are all very high, and itself is comparatively heat-resisting, the heat in bear inner ring grooved railway and outer ring raceway can be derived and fall apart but.

Preferably, the coefficient of curvature of the interface of described anticreep mouth and described bear inner ring grooved railway or described outer ring raceway is 1.10.Herein, the interface coefficient of curvature arranging anticreep mouth and bear inner ring grooved railway or outer ring raceway is comparatively large, when wearing and tearing little to ball, can limit its zone of action.

Positive progressive effect of the present utility model is: increased by the coefficient of curvature increasing inside and outside circle raceway groove itself and reduce rolling element and a raceway groove area of contact, reduce the temperature rising that frictional heating causes, improve waviness further, improve bearing rotational stability, bearing is in good lubrication state, also can reduce the temperature rising that frictional heating causes.By arranging resist delamination on inner ring and outer ring, make ball difficult drop-off

Accompanying drawing explanation

Fig. 1 is the ball bearing structure schematic diagram for high-speed servo motor of the utility model preferred embodiment.

Embodiment

Lift preferred embodiment below, and come by reference to the accompanying drawings clearlyer intactly the utility model to be described.

Fig. 1 is the ball bearing structure schematic diagram for high-speed motor of the present embodiment, and as shown in Figure 1, the ball bearing for high-speed motor that the present embodiment relates to includes:

Inner ring 1, outer ring 2, ball 4 and retainer 3, outer ring 2 and inner ring 1 are respectively arranged with outer ring raceway 21 and bear inner ring grooved railway 11, outer ring 2 and inner ring 1 in opposite directions and the clamping ball 4 of activity in outer ring raceway 21 and bear inner ring grooved railway 11, outer ring 2 and inner ring 1 are respectively arranged with a resist delamination 5, and resist delamination 5 position corresponding with bear inner ring grooved railway 11 and outer ring raceway 21 is provided with the anticreep mouth that and bear inner ring grooved railway 11 and outer ring raceway 21 is smoothly docked.

The coefficient of curvature of bear inner ring grooved railway 11 is 1.04 ~ 1.05, and the coefficient of curvature of outer ring raceway 21 is 1.06 ~ 1.07, and Internal and external cycle raceway groove waviness is less than 1.0 μm.

Resist delamination 5 is made up of Ni-based oxidation-resistant alloy.

The coefficient of curvature of the interface of anticreep mouth and bear inner ring grooved railway 11 or outer ring raceway 21 is 1.10.

In addition, the waviness of bear inner ring grooved railway 11 and outer ring raceway 21 is all less than 1.0 μm

In order to characterize the effect reduced for temperature rise in the ball bearing of high-speed servo motor that the present embodiment relates to, its corresponding data is as shown in table 1 ~ 2:

Ball bearing (bear inner ring grooved railway coefficient of curvature is 1.02, and outer ring raceway coefficient of curvature is 1.02, and Internal and external cycle raceway groove waviness is between 2.0 ~ 3.0 μm) the temperature rise data of table 1 case 1 as a comparison:

Ball bearing (bear inner ring grooved railway coefficient of curvature is 1.10, and outer ring raceway coefficient of curvature is 1.10, and Internal and external cycle raceway groove waviness is between 2.0 ~ 3.0 μm) the temperature rise data of table 2 case 2 as a comparison:

Ball bearing (bear inner ring grooved railway coefficient of curvature is 1.05, and outer ring raceway coefficient of curvature is 1.07, and Internal and external cycle raceway groove waviness is less than 1.0 μm) the temperature rise data of table 3 the present embodiment:

As can be seen from table 1 ~ 3, the temperature rise of the ball bearing of the present embodiment obviously reduces relative to prior art.

Although the foregoing describe embodiment of the present utility model, it will be understood by those of skill in the art that this only illustrates, protection domain of the present utility model is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present utility model and essence, can make various changes or modifications to these mode of executions, but these change and amendment all falls into protection domain of the present utility model.

Claims (2)

1. the ball bearing for high-speed motor, it includes an inner ring, one outer ring, one ball and a retainer, described outer ring and described inner ring are respectively arranged with an outer ring raceway and a bear inner ring grooved railway, described outer ring and described inner ring in opposite directions and the described ball of the clamping of activity in described outer ring raceway and described bear inner ring grooved railway, it is characterized in that, described outer ring and described inner ring are respectively arranged with a resist delamination, the described resist delamination position corresponding with described bear inner ring grooved railway and described outer ring raceway is provided with the anticreep mouth smoothly docked with described bear inner ring grooved railway and described outer ring raceway,

The coefficient of curvature of described bear inner ring grooved railway is 1.04 ~ 1.05, and the coefficient of curvature of described outer ring raceway is 1.06 ~ 1.07;

The waviness of described bear inner ring grooved railway and described outer ring raceway is all less than 1.0 μm.

2., as claimed in claim 1 for the ball bearing of high-speed motor, it is characterized in that, described resist delamination is made up of Ni-based oxidation-resistant alloy.