CN207229605U - Wheel support roller bearing unit - Google Patents

Abstract

It the utility model is related to the wheel support roller bearing unit for the wheel of automobile rotatably to be supported relative to draft hitch.The volume of the 1st rib in the rib at the multiple positions of circumferencial direction in the axially inner side face of rotary-side flange, close to open-work is set to be more than the volume of the 2nd rib away from open-work, thus, on rotary-side flange in the case where being equipped with open-work relative to multiple positions of the unequal interval of circumferencial direction, also it can suppress to have the rotation of the wheel hub of rotary-side flange uneven, and the torque rigidity of rotary-side flange can be made close uniform in the range of complete cycle.

Description

Wheel support roller bearing unit

Technical field

It the utility model is related to the wheel support for the wheel of automobile rotatably to be supported relative to draft hitch Use roller bearing unit.

Background technology

In patent document 1, as the wheel for wheel rotatably to be supported relative to the draft hitch of automobile Supporting roller bearing unit, records an example constructed in the past.Wheel support roller bearing unit, will by multiple balls Wheel hub as rotary side raceway circle can be supported rotatably relative to the outer ring as stationary-side raceways circle.Wheel hub have make Used time combines the rotary-side flange of fixing vehicle wheel and braking rotary part.

In the side of rotary-side flange, at the equally spaced multiple positions of circumferencial direction, it is respectively equipped with radial elongation Rib.On each rib formed with axially through mounting hole.At multiple positions of the circumferencial direction of rotary-side flange, from each rib The part left, with axially through state be equipped with open-work.Open-work be in order at seek rotary-side flange light-weighted purpose, Into be about to outer ring and brake component relative to the other side such as knuckle component with reference to operation etc. purpose and set.

In general, in order to which the rotation for the wheel hub for suppressing to have rotary-side flange is uneven, and make the torque of rotary-side flange Rigidity is close uniform in the range of complete cycle, and open-work is disposed at equal intervals relative to circumferencial direction.But in order to efficiently into It is about to instrument to intert to each of each open-work and utilize what instrument combined outer ring and brake component etc. relative to other side's component Operation, has that following way can be more suitable for：According to the operating environment as object, by each open-work relative to circumferencial direction Set with unequal interval.

But if each open-work is set relative to circumferencial direction with unequal interval, it can produce with rotary-side flange The rotation imbalance of wheel hub becomes larger and the torque rigidity of rotary-side flange becomes non-uniform problem in the range of complete cycle.

Prior art literature

Patent document

Patent document 1：Special open 2008-055984 Japanese Laid Open Patents

Utility model content

The utility model is put and is made to solve the above-mentioned problems, its problem is to realize that one kind can suppress to have The rotation of the rotary side raceway circle of rotary-side flange is uneven and can make the torque rigidity of rotary-side flange in complete cycle scope It is interior close to uniform wheel support roller bearing unit.

In order to solve the above problems, the utility model provides a kind of wheel support roller bearing unit, it is characterised in that Possess：Stationary-side raceways circle, it has stationary-side raceways on side face, and supporting and fixing is in draft hitch；Rotary side raceway circle, It has rotary side raceway on side face, and with the rotary-side flange for fixing vehicle wheel；With multiple rolling elements, it is rotated certainly Such as it is located between stationary-side raceways and rotary side raceway,

On the axially inner side face of rotary-side flange, at equally spaced multiple positions relative to circumferencial direction, equipped with The rib of radial elongation, rotary-side flange is equipped with each rib to be used to install the installation of the engaging portion material of the wheel fixation Hole, and at multiple positions of the unequal interval relative to circumferencial direction and from the part that each rib leaves, equipped with open-work, make To be more than relative to volume of the circumferencial direction close to the 1st rib of the rib of open-work as relative to rib of the circumferencial direction away from open-work The volume of 2nd rib.

And, it is characterised in that the length dimension relative to radial direction of the 1st rib is more than the length relative to radial direction of the 2nd rib Spend size.

And, it is characterised in that the width dimensions relative to circumferencial direction of the 1st rib are more than the 2nd rib relative to circumference The width dimensions in direction.

And, it is characterised in that the thickness relative to axial direction for being more than the 2nd rib relative to axial thickness of the 1st rib Spend size.

Utility model effect

According to the utility model, wheel support roller bearing unit is relative to circumferencial direction in rotary-side flange Multiple positions of unequal interval are equipped with the construction of open-work, but the rotation that can suppress rotary side raceway circle is uneven, and can Make the torque rigidity of rotary-side flange close uniform in the range of complete cycle.

Brief description of the drawings

Fig. 1 is the sectional view for the wheel support roller bearing unit for representing the 1st embodiment.

Fig. 2 is the figure that the slave axially inner side of the hub body of Fig. 1 is observed.

Fig. 3 is the figure that the slave axially inner side for the hub body for representing the 2nd embodiment is observed.

Fig. 4 is the figure that the slave axially inner side for the hub body for representing the 3rd embodiment is observed.

Embodiment

(the 1st embodiment)

Fig. 1~2 show the 1st embodiment of the utility model.The wheel support of present embodiment roller bearing unit 1 For the wheel rim (wheel) 22 of wheel and braking to be turned with rotary part (brake disc rotor) 23 relative to composition draft hitch Rotatably supported to section 21, the internal side diameter in the outer ring 2 as stationary-side raceways circle, via multiple rollings as rolling element Pearl 4 and rotatably support the wheel hub 3 as rotary side raceway circle.In addition, relative to wheel support roller bearing unit 1 Axial direction, by be assembled in the state of vehicle body as vehicle width on the outside of Fig. 1 left side be known as " outer ", will become The right side of Fig. 1 of the width center side of vehicle is known as " interior ".

Outer ring 2 is middle carbon steel, is monolithically fabricated to be substantially cylindric, the outer ring raceway 5 with multiple row on inner peripheral surface, And there is static side flange 6 on outer circumferential surface.Outer ring 2 passes through the multiple positions of circumferencial direction with being formed at static side flange 6 More bolts 24 that threaded hole 7 screws togather and be fixed on knuckle 21.

Wheel hub 3 forms hub body 8 and inner ring 9 with reference to fixation, has the inner ring raceway of multiple row on outer circumferential surface 10 and rotary-side flange 11a.Wheel hub 3 is fixed on the wheel rim 22 and braking rotary part 23 1 of rotary-side flange 11a with combining Play rotation.Hub body 8 implements forging processing to be made by blank materials such as centering carbon steel.On the outer circumferential surface of hub body 8, In the rotary-side flange 11a for being formed in part with outward flange shape by axial outer end, in axial pars intermedia formed with outer rows Inner ring raceway 10, path layers of difference portion 12 is being formed in part with by axial inner ends.Inner ring 9 is bearing steel, is monolithically fabricated as circle Tubular, the inner ring raceway 10 formed with inner column on outer circumferential surface.Inner ring 9 schedules the state of path layers of difference portion 12 in outer build-in, By the way that axial inner ends face is pressed in fastening part 13 fixation is combined with hub body 8.

Ball 4 is bearing steel, between the outer ring raceway 5 of multiple row and the inner ring raceway 10 of multiple row, is rolled respectively by each row It is dynamic be configured with freely it is multiple.The combined contact angle of precompressed and the back side is imparted to each ball 4 for being configured to multiple row (2 row), The axial both ends open for being provided with the space of each ball 4 is sealed by sealing ring 25a, 25b respectively.

The wheel support roller bearing unit 1 of present embodiment is that driving wheel (front-wheel of FF (forerunner) car etc.) is used, because This wheel hub 3 (hub body 8) central part formed with splined hole 26.In splined hole 26, inserted with being fixedly arranged on constant velocity universal Save the splined shaft 28 of the outer end face of outer ring 27.By the nut 29 screwed togather with the front end of splined shaft 28, by wheel hub 3 and constant speed Universal joint outer ring 27 combines.

The outer circumferential surface of rotary-side flange 11a is the cylindrical shape centered on the central shaft of hub body 8.Rotary-side flange The axially external face of 11a is the tabular surface relative to the orthogonality of center shaft of hub body 8.The axially inner side of rotary-side flange 11a Face is the male and fomale(M＆F) relative to circumferencial direction.It is equally spaced more in circumferencial direction on the axially inner side face of rotary-side flange 11a A position, alternately configures relative to circumferencial direction and (this 4 positions of 2+2 is configured in illustrated example) with the of radial elongation 1 rib 20a and the 2nd rib 20b.Each rib 20a, 20b are in the radial inner end from rotary-side flange 11a to the part by radial outer end In the range of be integrally provided.Rotary-side flange 11a is heavy section 15a relative to circumferencial direction part corresponding with the 1st rib 20a, Part corresponding with the 2nd rib 20b is heavy section 15b.It is moreover, not corresponding with the 1st rib 20a and the 2nd rib 20b relative to circumferencial direction Part be thinner wall section 16.Rotary-side flange 11a alternately has heavy section 15a (15b) and thinner wall section relative to circumferencial direction 16.Ratio each heavy section 15a, 15b in rotary-side flange 11a lean on the position of radial outside, equipped with making to be configured at each heavy section A pair of of thinner wall section 16,16 of the circumferencial direction both sides of 15a, 15b continuous outside diameter thinner wall section 30 each other.

Each heavy section 15a, 15b's is identical relative to axial thickness.Each thinner wall section 16 and each outside diameter thinner wall section 30 thickness relative to axial direction is also identical.Therefore, the slave thin-walled relative to axial direction of each 1st rib 20a and the 2nd rib 20b The bulging size T in portion 16 is identical in each heavy section 15a, 15b.

Relative to the circumferencial direction of rotary-side flange 11a, in the circumferencial direction center positioned at the 1st rib 20a and the 2nd rib 20b Part, with axially through state be equipped with mounting hole 17.Each mounting hole 17 is the identical circular hole (or internal thread hole) of size, It is located on same pitch circle.Press-in has the base end part of stud 18 in mounting hole 17.In wheel rim 22 and braking rotary part After the front end for having interted stud 18 in 23 through hole, nut 31 is screwed togather, thus by braking rotary part 23 and wheel Circle 22 is fixed on rotary-side flange 11a.

At the multiple positions of the circumferencial direction of rotary-side flange 11a, part corresponding with each thinner wall section 16 (from each rib 20a, The part that 20b leaves), with axially through state be equipped with open-work 19.Each open-work 19 is the identical circular hole of size, is located at same On pitch circle.

In addition, arranged on rotary-side flange 11a open-work (19) slave end on observation to shape be not limited to circle, can adopt With variously-shaped (such as ellipse, sector, polygon etc.).In addition, it can also make in these multiple open-works (19) mutual Shape and/or of different sizes.

In this case, in order to efficiently carry out in each of each open-work 19 be inserted into instrument simultaneously , will using instrument by outer ring 2 and brake component relative to operations such as other side's component combinations, and according to the operating environment as object Each open-work 19 is set relative to circumferencial direction with unequal interval.Specifically, each open-work 19 is arranged on relative to circumferencial direction and connect The position of nearly 1st rib 20a and the position away from the 2nd rib 20b.

Therewith concomitantly, the volume (weight, torque rigidity) of the 1st rib 20a is made to be more than the volume of the 2nd rib 20b.Specifically Say, the length dimension La relative to radial direction of the 1st rib 20a is more than the length dimension Lb (La relative to radial direction of the 2nd rib 20b ＞ Lb).In other words, make its radially outer end of the 1st rib 20a compared with its radially outer end of the 2nd rib 20b, drawn with the two point than Fig. 2 Line α (equivalent to part of the 2nd rib 20b) is located at radial outside correspondingly, extends to radial outside.

By using the structure for volume of the volume more than the 2nd rib 20b for making the 1st rib 20a, and utilize the weight of the 1st rib 20a To compensate the weight of the periphery of each open-work 19, and the periphery of each open-work 19 is compensated using the torque rigidity of the 1st rib 20a Torque rigidity, thus, it is uneven to suppress the rotation of the wheel hub 3 with rotary-side flange 11a, and makes rotary-side flange 11a Torque rigidity in the range of complete cycle close to uniform.

(the 2nd embodiment)

Fig. 3 shows the 2nd embodiment of the utility model.In this case, the close to open-work 19 the 1st is made The width dimensions Wa relative to circumferencial direction of rib 20a is more than the width relative to circumferencial direction of the 2nd rib 20c away from open-work 19 Spend size Wc (Wa ＞ Wc).Make the circumferencial direction both ends of the 1st rib 20a compared with the circumferencial direction both ends of the 2nd rib 20c, with Double dot dash line β, β (equivalent to part of the 2nd rib 20c) than Fig. 3 are located at circumferencial direction both sides correspondingly, to circumferencial direction both sides Extension.

By making the volume of the 1st rib 20a be more than the volume of the 2nd rib 20c, and it is each to compensate using the weight of the 1st rib 20a The weight of the periphery in hole 19, and the torque for compensating using the torque rigidity of the 1st rib 20a the periphery of each open-work 19 is firm Property, thus, suppress the rotation imbalance of the wheel hub 3 with rotary-side flange 11b, and make the torque of rotary-side flange 11b firm Property in the range of complete cycle close to uniform.Other structures and effect are identical with the situation of above-mentioned 1st embodiment.

(the 3rd embodiment)

Fig. 4 shows the 3rd embodiment of the utility model.In this case, make to be located at rotary-side flange The quantity of the 1st rib 20d and the 2nd rib 20e (heavy section 15d, 15e) at the multiple positions of circumferencial direction in the axially inner side face of 11c, with And it is located at and is respectively five relative to the quantity of the mounting hole 17 of circumferencial direction part corresponding with each rib 20d, 20e.

In addition, relative to the thinner wall section 16 for forming rotary-side flange 11c, make to set with unequal interval relative to circumferencial direction Open-work 19 quantity be four.Four open-works 19 relative to it is in five the 1st rib 20d and the 2nd rib 20e, in Fig. 4 from Four the 1st rib 20d of the part that upper end is left, are respectively being configured with one relative to circumferencial direction close proximity respectively.Separately On the one hand, each open-work 19 is arranged respectively at relative to circumferencial direction relative to a 2nd rib 20e of the upper end in Fig. 4 Remote position.

The volume of the 1st rib 20d is set to be more than the volume of the 2nd rib 20e.For this reason, make the 1st rib 20d relative to circumferencial direction Width dimensions Wd is more than the width dimensions We (Wd ＞ We) relative to circumferencial direction of the 2nd rib 20e.Make the circumference side of the 1st rib 20d To side or the end of opposite side (close to 19 side of open-work of itself) and the circumferencial direction side of the 2nd rib 20e or the end of opposite side Portion compares, and is located at circumferencial direction side to the double dot dash line γ (equivalent to part of the 2nd rib 20e) than Fig. 4 or opposite side is corresponding Ground, extends to circumferencial direction side or opposite side.

By making the volume of the 1st rib 20d be more than the volume of the 2nd rib 20e, and it is each to compensate using the weight of the 1st rib 20d The weight of the periphery in hole 19, and the torque for compensating using the torque rigidity of the 1st rib 20d the periphery of each open-work 19 is firm Property.Moreover, the rotation for suppressing wheel hub 3 is uneven, and make the torque rigidity of rotary-side flange 11c close equal in the range of complete cycle It is even.Other structures and effect are identical with the situation of above-mentioned 1st embodiment.

In addition, the utility model can also be implemented the constructions of the respective embodiments described above is appropriately combined.In addition, also can Make thickness T (with reference to Fig. 1) phase relative to axial direction of each rib to make the volume of multiple ribs (heavy section) mutually different It is mutually different.That is, can also make close to the rib of open-work relative to axial thickness be more than the rib away from open-work relative to Axial thickness.

The utility model can be applied not only to the rotary-type wheel support rolling bearing list of inner ring as shown in Figure 1 Member, can also be suitable for the rotary-type wheel support roller bearing unit in outer ring.In addition, the utility model can not only be applicable in , also can be suitable for the wheel support rolling bearing list of driven wheel in the wheel support roller bearing unit of driving wheel Member.

Claims (4)

1. a kind of wheel support roller bearing unit, it is characterised in that possess：

Stationary-side raceways circle, it has stationary-side raceways on side face, and supporting and fixing is in draft hitch；

Rotary side raceway circle, it has rotary side raceway on side face, and with the rotary-side flange for fixing vehicle wheel；With

Multiple rolling elements, it is rotatably located between the stationary-side raceways and the rotary side raceway,

On the axially inner side face of the rotary-side flange, relative to the equally spaced multiple positions of circumferencial direction, equipped with to put The rib of shape elongation is penetrated,

The rotary-side flange is equipped with the mounting hole for being used for installing engaging portion material on each rib, and the bonded block is used for will The wheel is fixed, and at multiple positions relative to circumferencial direction unequal interval and from the part that each rib leaves, if There is open-work,

It is more than as relative to volume of the circumferencial direction close to the 1st rib of the rib of the open-work as remote relative to circumferencial direction The volume of 2nd rib of the rib of the open-work.

2. wheel support roller bearing unit as claimed in claim 1, it is characterised in that

The length dimension relative to radial direction of 1st rib is more than the length dimension relative to radial direction of the 2nd rib.

3. wheel support roller bearing unit as claimed in claim 1, it is characterised in that

The width dimensions relative to circumferencial direction of 1st rib are more than the broad-ruler relative to circumferencial direction of the 2nd rib It is very little.

4. wheel support roller bearing unit as claimed in claim 1, it is characterised in that

The thickness relative to axial direction for being more than the 2nd rib relative to axial thickness of 1st rib.