The tapered roller bearing of mixed type rolling element
Technical field
The utility model relates to technical field of bearings, are specifically tapered roller bearings.
Background technique
Requirement of the modern industry of rapid development to bearing performance is higher and higher, to the requirement day of the high speed performance of bearing
Beneficial stringent, certain performances of steel bearings can no longer meet higher requirement, and ceramic bearing is the novel height of generally acknowledged one kind
Fast bearing, but roller class bearing varions type load is big, ceramic bearing is unable to satisfy loading demands.
Summary of the invention
The present utility model purpose: to overcome defect of the existing technology, the utility model provides one kind and can both mention
For preferably carrying, while meeting the tapered roller bearing of the mixed type rolling element of high revolving speed requirement.
To achieve the above object, the utility model provides following technical solution:
A kind of tapered roller bearing of mixed type rolling element, including outer ring, inner ring, taper roller and retainer, circular cone
Roller is held between outer ring and inner ring through retainer, it is characterised in that: the taper roller includes steel roller and lightweight
Roller, the taper roller be it is a plurality of, in being successively arranged alternately, lightweight roller is that ceramics roll for steel roller and lightweight roller
Son or the taper roller are odd number, lightweight roller one more than steel roller, lightweight roller include ceramic roller and
Porcelain packet roller, the ceramic roller is identical as steel roller quantity, and steel roller is in successively to be arranged alternately with ceramic roller, porcelain
Packet roller is set between steel roller and ceramic roller, and the porcelain packet roller includes cylinder steel lantern ring, in cylinder steel lantern ring
The heart is filled with ceramics pole, and cylinder steel lantern ring outer circumference surface is equipped with ceramic coating.
By using above-mentioned technical proposal, using mixed roller designs, ceramics are harder, and more wear resistant, ceramic roller is close
Degree is more much smaller than steel roller density, and the coefficient of friction of ceramic roller is much smaller relative to steel roller, the effective height for improving bearing
Fast performance and low friction moment performance, steel roller intensity is more preferable, so that bearing has preferable load-carrying ability, in taper roller
When being a plurality of, steel roller, in being successively arranged alternately, prevents bias with ceramic roller;It is more when taper roller is odd number
A taper roller out uses special porcelain packet roller designs, and porcelain packet roller takes into account bearing capacity, dynamic balancing, while having guarantee
The high-revolving effect of bearing.
Preferably, the retainer includes the taper steel tubular frame body for being uniformly distributed circumferentially pocket hole, taper tubular
The small end of frame body is equipped with the small end flange to internal diameter side to overturn, on the taper tubular frame body between two neighboring pocket hole
Beam excircle side wall is equipped with oil storage tank, and oil storage tank extends along beam length direction, and the cross sectional shape of oil storage tank is that bottom is small, mouth is big
Isosceles trapezoid.Under structure design, oil storage tank makes that lubricating oil can be stored at retainer, to improve greasy property, improves axis
Forward speed.
Preferably, the taper roller guidance raceway big end on the inner ring outer circumference surface is equipped with big end rib, big end rib
Roller contact face towards taper roller guidance raceway is convex arc surface, and convex arc surface is contacted with the big end end face of taper roller matches
It closes.Under structure design, big end rib is supported using convex arc surface and the big end in contact of taper roller, to reduce contact surface
Product, improves the speed of bearing operation.
Preferably, the taper roller on the inner ring outer circumference surface guides and is equipped with jump-ring slot at raceway small end, in jump-ring slot
Equipped with the backstop circlip with taper roller small end end face counter stopper.Under structure design, direct shape on traditional inner ring is removed
It is designed at small end rib, substitution small end rib is designed using backstop circlip, facilitates the assembly of bearing.
The utility model is further described with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the tapered roller bearing structural schematic diagram of one mixed type rolling element of the utility model specific embodiment;
Fig. 2 is the tapered roller bearing structural schematic diagram of two mixed type rolling element of the utility model specific embodiment;
Fig. 3 is part A partial enlarged view in Fig. 2;
Fig. 4 is the tapered roller bearing radial cross-section of two mixed type rolling element of the utility model specific embodiment;
Fig. 5 is part B partial enlarged view in Fig. 4;
Fig. 6 is C portion partial enlarged view in Fig. 4;
Fig. 7 is the utility model specific embodiment retainer structural schematic diagram.
Specific embodiment
Referring to attached drawing 1, a kind of tapered roller bearing of mixed type rolling element disclosed by the utility model, including it is outer ring 1, interior
Circle 2, taper roller 3 and retainer 4, taper roller 3 are held between outer ring 1 and inner ring 2 through retainer, the circular cone rolling
Son 3 includes steel roller 31 and lightweight roller, as shown in Figure 1, the taper roller is a plurality of, steel roller and lightweight roller
In being successively arranged alternately, lightweight roller is ceramic roller 32.
As shown in Figures 2 and 3, the taper roller is odd number, and lightweight roller is compared with more than 31 one, steel roller, lightweight rolling
Attached bag includes ceramic roller 32 and porcelain packet roller 33, and the ceramic roller 32 is identical as 31 quantity of steel roller, and steel roller
31 with ceramic roller 32 in being successively arranged alternately, porcelain packet roller 33 is set between steel roller 31 and ceramic roller 32, the porcelain
Packet roller 33 includes cylinder steel lantern ring 331, and 331 center-filled of cylinder steel lantern ring has ceramics pole 332, cylinder steel lantern ring
331 outer circumference surfaces are equipped with ceramic coating 333.Using mixed roller designs, ceramics are harder, and more wear resistant, ceramic roller is close
Degree is more much smaller than steel roller density, and the coefficient of friction of ceramic roller is much smaller relative to steel roller, the effective height for improving bearing
Fast performance and low friction moment performance, steel roller intensity is more preferable, so that bearing has preferable load-carrying ability, in taper roller
When being a plurality of, steel roller, in being successively arranged alternately, prevents bias with ceramic roller;It is more when taper roller is odd number
A taper roller out uses special porcelain packet roller designs, and porcelain packet roller takes into account bearing capacity, dynamic balancing, while having guarantee
The high-revolving effect of bearing.
As shown in Fig. 1 ~ 6, the retainer 4 includes the taper steel tubular frame body for being uniformly distributed circumferentially pocket hole 410
41, the small end of taper tubular frame body 41 is equipped with the small end flange 42 to internal diameter side to overturn, is located on the taper tubular frame body 41
411 excircle side wall of beam between two neighboring pocket hole 410 is equipped with oil storage tank 412, and oil storage tank 412 is along 411 length direction of beam
Extend, the cross sectional shape of oil storage tank 412 is the isosceles trapezoid that bottom is small, mouth is big.Oil storage tank 412 makes that lubrication can be stored at retainer
Oil improves bearing revolving speed to improve greasy property.Taper roller guidance raceway big end on 2 outer circumference surface of inner ring is set
There is big end rib 21, the roller contact face 211 of big end rib 21 towards taper roller guidance raceway is convex arc surface, convex arc surface
It is engaged with the big end end face of taper roller 3.Big end rib is supported using convex arc surface and the big end in contact of taper roller, from
And contact area is reduced, improve the speed of bearing operation.
It is equipped with jump-ring slot 22 at taper roller guidance raceway small end on 2 outer circumference surface of inner ring, is set in jump-ring slot 22
There is the backstop circlip 23 with taper roller small end end face counter stopper.It removes and directly forms small end rib on traditional inner ring and set
Meter designs substitution small end rib using backstop circlip, facilitates the assembly of bearing.