CN207049196U - A kind of double-row conical bearing of band activity back-up ring - Google Patents

Abstract

The utility model belongs to technical field of bearings, more particularly to a kind of double-row conical bearing of band activity back-up ring, including outer ring, inner ring, rolling element, retainer, outer ring spacer, it is characterized in that, also include the movable back-up ring with inner ring interference fit, the retainer small end bottom surface is without annular turnup structure, big end bottom surface uses beveled structure, two lintels of retainer fenestra increase two radially lock points respectively, two lock point transverse width coverings on same lintel roll the 55%~70% of body length, holding frame body axial cross section is formed L-shaped structure.A kind of double-row conical bearing of band activity back-up ring of the present utility model has the advantages of internal bearing load is big, bearing accuracy is high, service life is long, easy for installation.

Description

A kind of double-row conical bearing of band activity back-up ring

Technical field

The utility model belongs to technical field of bearings, and in particular to a kind of double-row conical bearing of band activity back-up ring.

Background technology

In the prior art, in order to realize that bearing can bear bidirectional axial force and larger radial load, often using single-row Pairing or shaft-penetrating type double-row conical bearing, not only load does not significantly improve, and manufacturing cost is high, and economic performance is poor, User installation is difficult.In the case where axially and radially load is big, it is necessary to be enough to support inner ring rib part shaft shoulder size and Intensity, can not meet the requirement on bearing under these conditions, and the inner ring rib used at present often with bearing Circle is integrated, difficulty of processing can be caused high, support strength is weaker.

Retainer refers to wrap up rolling element, and the parts of bearings moved therewith, to separation roller, generally also guiding rolling Kinetoplast is simultaneously held it in bearing, and basket type retainer, conventional basket type retainer are often used in double-row conical bearing Using small end annular flange, aperture shape is full lock construction, and locking face has all covered with roller contact region, causes contact surface Increase, frictional force increase, heat dispersion is poor.Closed up seriously for the retainer of special light, ultralight series of products, back rest production Raw gross distortion, causes guide clearance theoretical between fenestra and rolling element to reduce, and heat is swollen in bearing long-time operation process Rolling element is easily stuck after swollen, so the big end of retainer is easily torn；Secondly point reason is：Retainer is prominent with bearing outer ring large end face Output is excessive, and shell body gland shoulder block is interfered with retainer small end during causing installation, is caused installation difficult, is influenceed bearing Bearing capacity and service life.

The content of the invention

In order to overcome above-mentioned technological deficiency, the utility model aims to provide a kind of novel high-strength retainer, movable Bearing load is greatly improved and increased the service life inside back-up ring, the novel bearing.

To realize above-mentioned technical purpose, the utility model uses technical scheme as follows：

A kind of double-row conical bearing of band activity back-up ring, including outer ring, inner ring, rolling element, retainer, outer ring spacer, Also include the movable back-up ring with inner ring interference fit, the retainer small end bottom surface is big to hold bottom surface to adopt without annular turnup structure With folding angled arrangement, two lintels of retainer fenestra increase two radially lock points respectively, and two lock points are laterally wide on same lintel Degree covering rolls the 55%~70% of body length, holding frame body axial cross section is formed L-shaped structure.

Compared with prior art, the beneficial effects of the utility model are：（1）Using the active catch being interference fitted with inner ring Circle, difficulty of processing is reduced, so as to increase the support strength of movable back-up ring, improve bearing accuracy and service life；（2）Retainer The improvement of structure can increase Bearing inner bearing load, reduce roller and the friction in pressure slope face, using " radially small lock at lintel The mode of amount ", ensure that locking face accounts for the 55%~70% of roller effective length, reduce frictional force, have a shaping groove between 2 lock points, Thermal diffusivity is considerably increased, so as to eliminate shear stress；（3）, on the one hand can be to prevent after the big end structure of retainer uses beveled structure Big end flexural deformation after only closing up, on the other hand add the integral rigidity of retainer.

Brief description of the drawings

Fig. 1 be the utility model bearing structural representation, wherein, 1. outer rings, 2. inner rings, 3. rolling elements, 4. retainers, 5. outer ring spacer, 6. movable back-up rings.

Fig. 2 is the structural representation of the utility model retainer, wherein, 41. retainer small end bottom surfaces, 42. retainers are big Hold bottom surface, 43. beveled structures.

Fig. 3 is the axial cross section structural representation of the utility model retainer.

Fig. 4 is the utility model retainer partial sectional view, wherein, 44. lock points.

Fig. 5 is the utility model retainer fenestration schematic diagram.

Embodiment

Utility model is described further according to specification drawings and specific embodiments.

A kind of double-row conical bearing of band activity back-up ring as shown in Figure 1, including outer ring 1, inner ring 2, rolling element 3, Retainer 4, outer ring spacer 5, in addition to the movable back-up ring 6 being interference fitted with inner ring 2, the retainer small end bottom surface 41 is without annular Turnup structure, big to hold bottom surface 42 to use beveled structure 43, two lintels of retainer fenestra increase two radially lock points 44 respectively, together Transverse width covers the 55%~70% of the length of rolling element 3 between two lock points on one lintel, forms holding frame body axial cross section L-shaped structure（Retainer structure is as shown in Figure 2-5）.

A kind of double-row conical bearing of band activity back-up ring of the present utility model uses the activity with inner ring interference fit Back-up ring, difficulty of processing is reduced, increase the support strength of movable back-up ring, improve bearing accuracy and service life；Retainer structure Improvement can increase Bearing inner bearing capacity, roller and the friction in pressure slope face are reduced, using " radially lock rolling element at lintel " Mode, ensure pin roller effective length 55%~70%, reduce frictional force, so as to eliminate shear stress；Retainer structure is big End one knuckle of increase can make retainer by not easy to break after reaction force, so as to lift the strength and stiffness of retainer； According to user's request and requirements of the national standard design retainer and beveled structure size, when mounted, make retainer not exposed, Do not limited to by operating mode.

Above content is to combine specific preferred embodiment further detailed description of the utility model, it is impossible to Assert that specific implementation of the present utility model is confined to these explanations.For the ordinary skill of the utility model art For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, should all be regarded To belong to the scope of protection of the utility model.

Claims (1)

1. a kind of double-row conical bearing of band activity back-up ring, including outer ring, inner ring, rolling element, retainer, outer ring spacer, its It is characterised by, in addition to the movable back-up ring with inner ring interference fit, the retainer small end bottom surface is without annular turnup structure, greatly Bottom surface is held to increase a beveled structure, two lintels of retainer fenestra increase two radially lock points respectively, two on same lintel Lock point transverse width covering rolls the 55%~70% of body length, holding frame body axial cross section is formed L-shaped structure.