CN205036730U - Unequal entity holder of rolling element pocket hole pitch - Google Patents

Abstract

The utility model discloses an unequal entity holder of rolling element pocket hole pitch, including the holder body, this internal circumferencial direction interval of following of holder is provided with a plurality of pocket holes, and the interval in adjacent per two pocket holes is unequal. The utility model has the advantages of the equal imbalance of interval in adjacent per two pocket holes, even under the rolling element of the same speed striking, the produced vibration frequency in every pocket hole is also inequality to avoid the resonance of entity holder effectively, reduced the noise that antifriction bearing produced because of the whilring motion of entity holder.

Description

The solid cage that a kind of rolling element pocket hole pitch is unequal

Technical field

The utility model relates to a kind of rolling bearing retainer, especially relates to the solid cage that a kind of rolling element pocket hole pitch is unequal.

Background technique

Low noise rolling bearing is applied to various occasion, particularly household electrical appliances more and more, because much electrical equipment all requires low noise bearing.And all conglomeraties such as engineering machinery, automobile, electric tool, also more and more higher to the requirement of bearing vibration and noise, its require the speed of the vibration of rolling bearing and vibration acceleration numerical value more low better, therefore, the research and development of each Company to low noise rolling bearing are gone into overdrive year by year.

Bear vibration comprises elastic vibration and forced vibration, and bearing noise is by the vibration of bearing part in operation process and extruding mutually, collides and a kind of sound phenomenon of generation, and so-called noise is exactly the abnormal noise heard at people's ear in the frequency of the sound.Rolling bearing is generally made up of bearing inner race, outer ring, rolling element, retainer etc., in rolling bearing operation process, the inside and outside circle relative movement of bearing, under the effect of contact friction, drive rolling element to move, during rolling element motion, by clashing into retainer, promote retainer motion, the whirling motion that retainer produces when being subject to clashing into also produces corresponding vibration and noise.Pocket hole on retainer is for separating rolling element and being distributed on retainer circumferentially, rolling element circumference uniform distribution between the inside and outside circle of bearing can be made like this, but also exist disadvantageously, due to retainer pocket hole between gear hurdle be uniform, thickness and the quality of namely keeping off hurdle are also impartial, rolling element at the same speed, during the gear hurdle that percussion structure is identical, weight is identical, the vibration frequency produced is also identical, resonance will be produced, produce vibration and noise that resonance not only can strengthen bearing, and the working life of retainer can be shortened.

In addition, bearing roller, in operation process, to the roll off of the inside and outside circle raceway of bearing, and the elastic hysteresis of rolling element and lasso, certainly leads to vibration.If there are some mass defects in course of working in bearing parts, as bearing parts processing shape, size error, do not clean up with dust, impurity etc. after assembling, these situations all can cause Bearing Abnormal Vibration in operation process, thus produce abnormal sound.

Bear vibration and noise Producing reason have factors, and those skilled in the art also studies low noise rolling bearing, and the applicant has mainly done bold trial for the resonance of elimination retainer.

Model utility content

Technical problem to be solved in the utility model: the solid cage that a kind of rolling element pocket hole pitch is unequal is provided for the deficiencies in the prior art, this retainer is arranged between the inside and outside circle of bearing, due to retainer each pocket hole between spacing not etc., make the unequal distribution of the spacing of rolling element in bearing, when bearing operation, avoid rolling element and retainer to collide the resonance produced, reduce vibration and the noise of bearing.

The technical problem that the utility model solves can realize by the following technical solutions:

The solid cage that rolling element pocket hole pitch is unequal, comprises retainer body, is along the circumferential direction arranged at intervals with some pocket holes, it is characterized in that in described retainer body, and the spacing in adjacent every two pocket holes is unequal.

In a preferred embodiment of the present utility model, the diameter in described pocket hole is greater than the diameter of the rolling element be arranged in described pocket hole.

In a preferred embodiment of the present utility model, described pocket hole is formed with an opening portion on the first side end face of described solid cage, and the width of described opening portion is less than the diameter of described rolling element.

In a preferred embodiment of the present utility model, the opening portion in described pocket hole is formed with an arc shaped surface near the first side end face place of described solid cage, and the diameter of described arc shaped surface equals the diameter of described rolling element.

In a preferred embodiment of the present utility model, the second side end face of described solid cage is formed with a ring-shaped step.

In a preferred embodiment of the present utility model, the radial cross section of described ring-shaped step is inverted triangle shape.

In a preferred embodiment of the present utility model, the chamfering of described ring-shaped step is 45 °.

Owing to have employed technological scheme as above, the beneficial effects of the utility model are: the spacing in adjacent every two pocket holes is all unequal, even if under the rolling element of identical speed clashes into, the vibration frequency that each pocket hole produces is not identical yet, thus efficiently avoid the resonance of solid cage, decrease the noise that rolling bearing produces because of the whirling motion of solid cage.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the structural representation of the bearing being provided with solid cage of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is three-dimensional structure schematic diagram of the present utility model.

Fig. 4 is plan view of the present utility model.

Fig. 5 is the B direction view of Fig. 4.

Fig. 6 is the A-A sectional view of Fig. 4.

Embodiment

The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.

See Fig. 1 and Fig. 2, the unequal solid cage 100 of rolling element pocket hole pitch of the present utility model is arranged between bearing inner race 200 and bearing outer ring 300, is also provided with rolling element 400 between bearing inner race 200 and bearing outer ring 300.

See Fig. 3 to Fig. 6, what provide in figure is the unequal solid cage 100 of rolling element pocket hole pitch of the present utility model, comprise retainer body, the pocket hole 110 that 11 shape sizes are identical is along the circumferential direction arranged at intervals with in this retainer body, pocket hole 110 is for installing rolling element 400, and the diameter D in pocket hole 110 ₁slightly be greater than the diameter of rolling element 400, make rolling element 400 can smart scroll in pocket hole 110, certainly, the quantity in pocket hole 110 can change according to the needs of different retainer.The spacing in adjacent every two pocket holes 110 is all unequal, and formed by the center in adjacent every two pocket holes 110 and solid cage 100 center, angle is respectively α ₁, α ₂, α ₃, α ₄, α ₅, α ₆, α ₇, α ₈, α ₉, α ₁₀, α ₁₁, and each angle α _n(1≤n≤11) are all unequal, are to rely on gear hurdle 120 to separate between wherein adjacent every two pocket holes 110, and because the spacing in adjacent every two pocket holes 110 is all unequal, thus the size on each gear hurdle 120 is also different.Bearing is in operation process, in bearing, outer ring 200, 300 relative movement, under the effect of contact friction, drive rolling element to move, by clashing into physical protection frame 100 during rolling element motion, and promote physical protection frame 100 and move, because the spacing in each the pocket hole 110 on physical protection frame 100 is unequal, even if physical protection frame 100 is under the shock of the rolling element 400 of identical speed, its vibration frequency produced is not identical, so produce resonance in movement process, significantly reduce the noise that bearing produces because of the whirling motion resonance of solid cage 100.

See Fig. 5, pocket hole 110 is formed with an opening portion 111 on the side end face 130 of solid cage 100, the width K of opening portion 111 is less than the diameter of rolling element 400 slightly, is formed with an arc shaped surface 112, the diameter D of this arc shaped surface 112 at opening portion 111 near side end face 130 place of solid cage 100 ₂be substantially equal to the diameter of rolling element 400 and be slightly less than the diameter D in pocket hole 110 ₁.When installing rolling element 400, first rolling element 400 is placed in arc shaped surface 112 place, then rolling element 400 is pressed in pocket hole 110, can rolling element 400 be installed in pocket hole 110 by the elastic strain of opening portion 111, width K due to opening portion 111 is less than the diameter of rolling element 400 slightly, the rolling element 400 being arranged on pocket hole 110 better can be located, prevent rolling element 400 from departing from.

See Fig. 6, the side end face 140 of solid cage 100 is formed with a ring-shaped step 141, and the radial cross section of this ring-shaped step 141 is upside-down triangle shape, and its undercut ss is 45 °.The outside diameter d of this ring-shaped step 141 ₁the outer diameter D of 100 is kept with entity ₃equal, its internal diameter d ₂be positioned at the internal diameter D of solid cage 100 ₄with outer diameter D ₃between.The effect of this ring-shaped step 141 avoids solid cage 100 and the seal ring be arranged between bearing inner race 200 and bearing outer ring 300 to contact with each other or vibration caused by mutually colliding or noise.The height H of ring-shaped step 141 can be determined according to different bearing sealed ring.

More than show and describe basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (7)

1. the solid cage that rolling element pocket hole pitch is unequal, comprises retainer body, is along the circumferential direction arranged at intervals with some pocket holes, it is characterized in that in described retainer body, and the spacing in adjacent every two pocket holes is unequal.

2. the solid cage that rolling element pocket hole pitch as claimed in claim 1 is unequal, it is characterized in that, the diameter in described pocket hole is greater than the diameter of the rolling element be arranged in described pocket hole.

3. the solid cage that rolling element pocket hole pitch as claimed in claim 2 is unequal, it is characterized in that, described pocket hole is formed with an opening portion on the first side end face of described solid cage, and the width of described opening portion is less than the diameter of described rolling element.

4. the solid cage that rolling element pocket hole pitch as claimed in claim 3 is unequal, it is characterized in that, the opening portion in described pocket hole is formed with an arc shaped surface near the first side end face place of described solid cage, and the diameter of described arc shaped surface equals the diameter of described rolling element.

5. the solid cage that rolling element pocket hole pitch as claimed in claim 1 is unequal, it is characterized in that, the second side end face of described solid cage is formed with a ring-shaped step.

6. the solid cage that rolling element pocket hole pitch as claimed in claim 5 is unequal, it is characterized in that, the radial cross section of described ring-shaped step is inverted triangle shape.

7. the solid cage that rolling element pocket hole pitch as claimed in claim 6 is unequal, it is characterized in that, the chamfering of described ring-shaped step is 45 °.