CN104565022A - Variable-contact angle tapered roller bearing - Google Patents

Abstract

The invention discloses a variable-contact angle tapered roller bearing. The variable-contact angle tapered roller bearing comprises an outer bearing ring, an inner bearing ring, a retaining frame and a tapered roller, and is characterized in that the raceway generatrix of the outer bearing ring is a function curve or a straight line; the raceway generatrix of the inner bearing ring is a straight line or a function curve; the tapered roller takes a function curve as a generatrix; the slope of the function curve changes in an axial direction; the slope of any point of the function curve changes along with the change of the distance from the any point to the end surface of the tapered roller bearing. Because the tapered roller bearing has the generatrix with a variable slope, the contact angle of the tapered roller bearing can change along with the change of the axial load when the tapered roller bearing works. Due to the shape of the generatrix of the tapered roller bearing, the contact angle of the tapered roller bearing changes, and meanwhile, a centering function is realized. The tapered roller bearing is applicable to the place where the coaxiality of a shaft and an inner hole in a bearing seat is very difficult to guarantee.

Description

Become wrapping angle tapered roller bearing

Technical field

The present invention relates to a kind of tapered roller bearing, especially relate to a kind of change wrapping angle tapered roller bearing.

Background technique

Tapered roller bearing can bear certain radial load and thrust load simultaneously, and its size of bearing thrust load is relevant with wrapping angle, and wrapping angle is larger, and the ability of bearing thrust load is stronger.The wrapping angle of tapered roller bearing is normally changeless, and the maximum axial that bearing bears often is subject to the restriction of its wrapping angle size.Therefore design a kind of wrapping angle can with thrust load vary in size and the tapered roller bearing that changes for bearing capacity and the life-span of improving bearing, all have very large meaning.Traditional tapered roller bearing does not have aligning effect, and the angular deviation of permission is very little, and therefore very high to the requirement of axle and bearing saddle bore coaxality, this proposes higher requirement to machining accuracy, adds the cost of Design and manufacture.Therefore a kind of tapered roller bearing with aligning function is needed.

Summary of the invention

The object of the present invention is to provide and a kind of become wrapping angle tapered roller bearing, when bus tapered roller with variable slope makes rolling bearing work, its wrapping angle can change along with thrust load and change.The shape of generatrix of tapered roller has aligning function while also making this tapered roller bearing wrapping angle change.

The technical solution used in the present invention is:

The present invention includes bearing outer ring, bearing inner race, retainer and tapered roller, it is characterized in that: described bearing outer ring ball track bus is function curve or straight line; Described bearing inner race raceway bus is straight line or function curve; Described tapered roller take function curve as the tapered roller of bus; Described function curve is the function curve that slope changes in the axial direction, and on function curve, the slope of any point changes along with the distance change of this any point distance tapered roller bearing end face.

The bus of described bearing outer ring ball track to be the bus of function curve and tapered roller be function curve matches, and the bus of described bearing inner race raceway to be the bus of straight line and tapered roller be function curve is tangent.

The bus of described bearing outer ring ball track to be the bus of straight line and tapered roller be function curve is tangent, and the bus of described bearing inner race raceway to be the bus of function curve and tapered roller be function curve matches.

The beneficial effect that the present invention has is:

1) when bus tapered roller with variable slope makes rolling bearing work, wrapping angle is variable.When thrust load increases, wrapping angle can increase thereupon, reduces roller-raceway load that thrust load causes, thus improves the axial carrying capacity of bearing.

2) owing to can change its loading coefficient by the wrapping angle changing tapered roller bearing, thus the equivalent radial load of reduction bearing is to improve bearing life.

3) because tapered roller can swing relative to outer ring or inner ring, this tapered roller bearing has aligning function simultaneously, is applicable to the occasion that axle and inner hole of bearing seat coaxality are difficult to ensure.

4), when raceway take straight line as bus, effectively can reduce the frictional force between roller and raceway, and the adaptation of raceway and roller is higher, bearing capacity is larger.The two kinds of bearing enclose compound modes adopted, when ensureing the bearing capacity of bearing, can reduce the frictional force between roller and raceway.

Accompanying drawing explanation

Fig. 1 is that outer ring raceway bus and roller bus match, the structural representation of inner ring raceway bus and the tangent single-row change wrapping angle tapered roller bearing of roller bus.

Fig. 2 is that outer ring raceway bus and roller bus are tangent, the structural representation of the single-row change wrapping angle tapered roller bearing that inner ring raceway bus and roller bus match.

Fig. 3 is that outer ring raceway bus and roller bus match, and inner ring raceway bus and the two raceway inner ring of the tangent biserial of roller bus become the structural representation of wrapping angle tapered roller bearing.

Fig. 4 is that outer ring raceway bus and roller bus match, and inner ring raceway bus and the tangent biserial outer ring with double raceway of roller bus become the structural representation of wrapping angle tapered roller bearing.

Fig. 5 is that outer ring raceway bus and roller bus are tangent, and the two raceway inner ring of the biserial that inner ring raceway bus and roller bus match becomes the structural representation of wrapping angle tapered roller bearing.

Fig. 6 is that outer ring raceway bus and roller bus are tangent, and the biserial outer ring with double raceway that inner ring raceway bus and roller bus match becomes the structural representation of wrapping angle tapered roller bearing.

Fig. 7 is when tapered roller bus is function curve during 3≤x≤11, outer ring raceway bus and roller bus tangent, the operating diagram of the single-row change wrapping angle tapered roller bearing that inner ring raceway bus and roller bus match.

Fig. 8 is when tapered roller bus is function curve during 3≤x≤11, the parameter designing schematic diagram of tapered roller.

Fig. 9 be when tapered roller bus be function curve y=lg (2x), during 3≤x≤11, outer ring raceway bus and roller bus tangent, the operating diagram of the single-row change wrapping angle tapered roller bearing that inner ring raceway bus and roller bus match.

Figure 10 is when tapered roller bus is function curve y=lg (2x), during 3≤x≤11, and the parameter designing schematic diagram of tapered roller.

Wherein: 1, bearing outer ring, 2, retainer, 3, take function curve as the tapered roller of bus, 4, bearing inner race.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further illustrated.

As shown in Fig. 1 ~ Fig. 6, the present invention includes bearing outer ring, bearing inner race, retainer 2 and tapered roller.Described bearing outer ring 1 raceway bus is function curve or straight line; Described bearing inner race 4 raceway bus is straight line or function curve; Described tapered roller take function curve as the tapered roller 3 of bus; Described function curve is the function curve that slope changes in the axial direction, and on function curve, the slope of any point changes along with the distance change of this any point distance tapered roller bearing end face.

As shown in Fig. 1, Fig. 3, Fig. 4, the bus of described bearing outer ring ball track to be the bus of function curve and tapered roller be function curve matches, and the bus of described bearing inner race raceway to be the bus of straight line and tapered roller be function curve is tangent.

As shown in Fig. 2, Fig. 5, Fig. 6, the bus of described bearing outer ring ball track to be the bus of straight line and tapered roller be function curve is tangent, and the bus of described bearing inner race raceway to be the bus of function curve and tapered roller be function curve matches.

Described change wrapping angle tapered roller bearing not only comprises single-row tapered roller bearing, as shown in Figure 1 and Figure 2; Also may be combined with into the two raceway inner ring tapered roller bearing of biserial, as shown in Fig. 3, Fig. 5; And biserial outer ring with double raceway tapered roller bearing, as shown in Fig. 4, Fig. 6.Can need according to practical application the change wrapping angle tapered roller bearing selecting any one form shown in Fig. 1 to Fig. 6, the shape of generatrix of tapered roller 3 function curve also can be selected according to the needs of the Changing Pattern of load and aligning.

Embodiment 1:

As shown in Figure 7, wherein the parameter designing schematic diagram of tapered roller as shown in Figure 8 for embodiment 1.The function curve equation of the bus of the tapered roller adopted in the present embodiment is

$y=\sqrt{C_{1}x}---\left(1\right)$

Coefficient C is got in above formula ₁=1, the slope variation scope of the bus of tapered roller can be made suitable, obtain curvilinear equation

$y=\sqrt{x}---\left(2\right)$

On curve, the tangent slope at any point (X, Y) place is

dY/dX＝0.5X ^-0.5(3)

The angle of tangent line and x-axis is

θ ₁＝tan ^-1(dY/dX)＝tan ^-1(0.5X ^-0.5) (4)

Bearing outer ring ball track is adopted to be the bus of straight line and tapered roller in the present embodiment to be the bus of function curve tangent, the bearing enclose combining form that the bus of bearing inner race raceway to be the bus of function curve and tapered roller be function curve matches, when bearing outer ring ball track and tapered roller are at point (X, Y), during place's contact, the wrapping angle of bearing is

α ₁＝θ ₁+β ₁＝tan ^-1(0.5X ^-0.5)+β ₁(5)

In formula, β ₁for the axis of tapered roller and the angle of supporting axle axis, as shown in Figure 7.In the present embodiment, the raceway of bearing outer ring and the point of contact of tapered roller larger the closer to the wrapping angle of bearing during its left end face, less the closer to the wrapping angle of bearing during bearing right side.

In the present embodiment in tapered roller parameter designing schematic diagram as shown in Figure 8, parameters value is as follows successively: the bus of tapered roller gets one section in curve equation (2) from x=3 to x=11, and namely the length L of tapered roller 3 is taken as 8 unit lengths.The axis of tapered roller 3 overlaps with x-axis, rotates, namely form the tapered roller 3 in the present embodiment with the plane domain that curve equation (2) and x=3, x=11 and x-axis surround around x-axis.

It needs to be noted: because the Internal and external cycle of this change wrapping angle tapered roller bearing can opposing oscillatory, so the angular deviation allowed during bearing working is greater than ordinary conical roller bearing, and this has just embodied superiority of the present invention.

Embodiment 2:

As shown in Figure 9, wherein the parameter designing schematic diagram of tapered roller as shown in Figure 10 for embodiment 2.The function curve equation of the bus of the tapered roller adopted in the present embodiment is

y＝lg(C ₂x) (6)

Coefficient C is got in above formula ₂=2, the slope variation scope of the bus of tapered roller can be made suitable, obtain curvilinear equation

y＝lg(2x) (7)

On curve, the slope of curve at any point (X, Y) place is

dY/dX＝(Xln10) ^-1(8)

The angle of tangent line and x-axis is

${\mathrm{\θ}}_2={\tan }^{-1}(\mathrm{dY}/\mathrm{dX})={\tan }^{-1}\left(\frac{1}{X\ln 10}\right)---\left(9\right)$

Bearing outer ring ball track is adopted to be the bus of straight line and tapered roller in the present embodiment to be the bus of function curve tangent, the bearing enclose combining form that the bus of bearing inner race raceway to be the bus of function curve and tapered roller be function curve matches, when bearing outer ring ball track and tapered roller are at point (X, Y), during place's contact, the wrapping angle of bearing is

α ₂＝θ ₂+β ₂＝tan ^-1[(Xln10) ^-1]+β ₂(10)

In formula, β ₂for the axis of tapered roller and the angle of supporting axle axis, as shown in Figure 9.In the present embodiment, the raceway of bearing outer ring and the point of contact of tapered roller larger the closer to the wrapping angle of bearing during its left end face, less the closer to the wrapping angle of bearing during bearing right side.

In the present embodiment in tapered roller 3 parameter designing schematic diagram as shown in Figure 10, parameters value is as follows successively: the bus of tapered roller 3 gets one section in curve equation (7) from x=3 to x=11, and namely the length L of tapered roller 3 is taken as 8 unit lengths.The axis of tapered roller 3 gets y=-1.5, rotates around the axis (y=-1.5) of tapered roller 3 with the plane domain that curve equation (7) and x=3, x=11 and y=-1.5 surround, and namely forms the tapered roller 3 in the present embodiment.

It needs to be noted: because the Internal and external cycle of this change wrapping angle tapered roller bearing can opposing oscillatory, so the angular deviation allowed during bearing working is greater than ordinary conical roller bearing, and this has just embodied superiority of the present invention.

Above-mentioned embodiment is used for explaining and the present invention is described, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.

Claims (3)

1. become a wrapping angle tapered roller bearing, it comprises bearing outer ring, bearing inner race, retainer and tapered roller, it is characterized in that: described bearing outer ring ball track bus is function curve or straight line; Described bearing inner race raceway bus is straight line or function curve; Described tapered roller take function curve as the tapered roller of bus; Described function curve is the function curve that slope changes in the axial direction, and on function curve, the slope of any point changes along with the distance change of this any point distance tapered roller bearing end face.

2. one according to claim 1 becomes wrapping angle tapered roller bearing, it is characterized in that: the bus of described bearing outer ring ball track to be the bus of function curve and tapered roller be function curve matches, the bus of described bearing inner race raceway to be the bus of straight line and tapered roller be function curve is tangent.

3. one according to claim 1 becomes wrapping angle tapered roller bearing, it is characterized in that: the bus of described bearing outer ring ball track to be the bus of straight line and tapered roller be function curve is tangent, the bus of described bearing inner race raceway to be the bus of function curve and tapered roller be function curve matches.