CN204025331U - A kind of main bearing - Google Patents

Abstract

The utility model discloses a kind of main bearing, aim to provide a kind of main bearing firm in structure, its technological scheme main points are that described inner ring outer peripheral surface central position is provided with bulge loop, described outer ring inner peripheral surface is provided with annular groove, described tapered roller is symmetrically distributed in bulge loop both sides and rolling surface and bulge loop end face and groove side and is affixed, between described groove inner peripheral surface and bulge loop outer peripheral surface, be provided with some cylindrical rollers, between described tapered roller and cylindrical roller, be provided with retainer, the utility model is firm in structure, production difficulty is low, bearing load is large, not fragile.

Description

A kind of main bearing

Technical field

The utility model relates to a kind of manufacture field of main bearing, and more particularly, it relates to a kind of main bearing that bears either direction.

Background technique

Traditional bearing is designed to bear pure radial load, pure thrust loading, or the radial load of portfolio ratio and thrust loading, the single-column type deep-groovebearing that comprises bearing ball bears radial load and some thrust loading, and can be designed to have the contact surface of inclination to bear larger thrust loading, ball bearing also can be configured to only bearing thrust load, straight roller-type bearing can bear radial load but cannot load by bearing thrust, roller bearing can be configured to have taper roller and can bear radial load or radial load and the thrust loading of thrust loading or portfolio ratio, yet these roller bearings are not suitable for bearing bidirectional propulsion load, when running into the load of this type, need to use contrary taper roller bearing, axial contact ball bearing, combination with spherical roller bearing.

At present, application number is that the Chinese patent of CN201310168327.5 discloses a kind of circular cone thrust-bearing, it comprises circle, lower circle, some tapered rollers, some small-sized thrust-bearings, centre circle, Shang Quan and lower circle symmetric design tapered raceway face, with tapered roller conical surface contact movement, the summit of three's conical surface concentrates on the central point O of bearing, guarantee the pure rolling of contact face, and the center line of roller is perpendicular to the center line of bearing, intersect at bearing centre point O, the large end of tapered roller is designed to cone and is connected with small-sized thrust-bearing inner ring, centre circle inner side and the some small-sized thrust-bearings of the supporting equidistant fixed installation of tapered roller, the radius size of design centre circle is closely connected with the cone of the large end of tapered roller to guarantee small-sized thrust-bearing, and guarantee that circular cone rolling element is on its intrinsic pure rolling raceway.

Although having overcome circular cone thrust-bearing roller, this circular cone thrust-bearing goes to the bottom and the problem of detaining string sliding friction, but can only bear the end thrust of single direction, and need some small-sized thrust-bearings to be installed between tapered roller and centre circle, complex structure, loose, production difficulty is high, and small-sized thrust-bearing can not carry larger load, fragile.

Model utility content

The deficiency existing for prior art, the purpose of this utility model is to provide a kind of main bearing of born either direction firm in structure.

For achieving the above object, the utility model provides following technological scheme: a kind of main bearing, comprise inner ring, outer ring, between described inner ring and outer ring, be provided with some tapered rollers, described inner ring is provided with bulge loop outward, described outer ring inner peripheral surface is provided with annular groove, described tapered roller is symmetrically distributed in bulge loop both sides, described each tapered roller conical surface contacts with bulge loop end face and groove side average line, between described groove inner peripheral surface and bulge loop outer peripheral surface, be provided with some cylindrical rollers, described tapered roller and cylindrical roller are respectively equipped with circular cone holder and cylinder retainer.

By adopting technique scheme, in the bulge loop left and right sides, tapered roller is all set and bears two-way end thrust, the relative other types roller of tapered roller can bear more end thrust, between bulge loop outer peripheral surface and groove inner peripheral surface, be also provided with cylindrical roller, the relative other types roller of cylindrical roller can bear more radial pressures, by three row rollers, both can carry the load of either direction, cancel small-sized thrust-bearing and simplified internal structure, improve overall construction intensity and increased load carrying capacity simultaneously, reduced spoilage.

The utility model is further set to: outside described outer ring, be arranged with self-aligning ring, described self-aligning ring and outer ring are slidably connected, and the surface of contact of described outer ring and self-aligning ring is arc surface

By adopting technique scheme, make this product there is self-aligning function, and the three relative outer rings of row roller and the not variation of inner ring position in aligning process, prevent that flexing from excessively causing the problem of bearing damage, self-aligning ring has played reinforcement effect simultaneously, has improved overall construction intensity.

The utility model is further set to: described bulge loop both ends of the surface are the conical surface, described bulge loop inner peripheral surface axial width is greater than outer peripheral surface axial width, described tapered roller comprises upper base and goes to the bottom, described upper base radius is less than the radius of going to the bottom, described upper base is towards inner ring axis direction, described in the inner ring axis direction dorsad of going to the bottom.

By adopting technique scheme, when inner ring bearing axial pushing force, can disperse uniformly thrust to tapered roller by the conical surface, and improve the structural strength of inner ring, increased integral load and working life.

The utility model is further set to: described groove side is perpendicular to inner ring axis.

By adopting technique scheme, reduced the manufacture difficulty of outer ring, and the vibrations of roller when the rolling of the surface of vertical axis can reduce operation, reduced operation noise and resistance, increased practicability and working life.

The utility model is further set to: described in go to the bottom and equal to go to the bottom the center of circle to inner ring axis distance and the upper base center of circle to inner ring axis ratio of distances constant with upper base radius ratio.

By adopting technique scheme, complete rolling friction is carried out in inner ring and outer ring relatively in when operation to make tapered roller, solved when tapered roller is gone to the bottom when operation and upper base rolls the problem with inner ring and outer ring generation sliding friction in different radial distances, the heat having produced while having reduced operation noise and operation, has improved practicability and working life.

The utility model is further set to: described groove inner peripheral surface is provided with the restraining groove for spacing cylindrical roller.

By adopting technique scheme, make the cylindrical roller can be because of the unbalance stress phenomenon of blocking or skid etc.

Accompanying drawing explanation

Fig. 1 is a kind of main bearing embodiment's of the utility model structural representation.

Reference character: 1, inner ring; 2, bulge loop; 3, tapered roller; 4, cylindrical roller; 5, circular cone holder; 6, cylinder retainer; 7, outer ring; 8, groove; 9, self-aligning ring; 10, upper base; 11, go to the bottom.

Embodiment

With reference to Fig. 1, a kind of main bearing embodiment of the utility model is described further.

As shown in Figure 1, a kind of main bearing, comprise inner ring 1, outer ring 7, between described inner ring 1 and outer ring 7, be provided with some tapered rollers 3, the outer bulge loop 2 that is provided with of described inner ring 1, described outer ring 7 inner peripheral surfaces are provided with annular groove 8, described tapered roller 3 is symmetrically distributed in bulge loop 2 both sides, described each tapered roller 3 conical surfaces contact with bulge loop 2 end faces and groove 8 side average lines, between described groove 8 inner peripheral surfaces and bulge loop 2 outer peripheral surfaces, be provided with some cylindrical rollers 3, described tapered roller 3 is respectively equipped with circular cone holder 5 and cylinder retainer 6 with cylindrical roller 3.

Inner ring 1 disperses axial force and radial force to three row rollers by bulge loop 2, solve double-row conical bearing and can only carry the problem of a certain proportion of axial force and radial force and the problem that single-row tapered roller bearing can only carry unidirectional end thrust, improved Applicable scope, the design of having cancelled small-sized thrust-bearing in structure has improved overall construction intensity, has increased load carrying capacity.

The outer self-aligning ring 9 that is arranged with in described outer ring 7, described self-aligning ring 9 is slidably connected with outer ring 7, described outer ring 7 is arc surface with the surface of contact of self-aligning ring 9, described bulge loop 2 both ends of the surface are the conical surface, described bulge loop 2 inner peripheral surface axial widths are greater than outer peripheral surface axial width, described tapered roller 3 comprises upper base 10 and goes to the bottom 11, described upper base 10 radiuses are less than 11 radiuses of going to the bottom, described upper base 10 is towards inner ring 1 axial direction, described 11 inner ring 1 axial directions dorsad of going to the bottom, described groove 8 lateral vertical are in inner ring 1 axis.

Aligning structure and rotor separate design can improve overall construction intensity, also reduced production difficulty, after flexing, rotor still can keep coaxial with inner ring 1 and outer ring 7, structural reliability and load carrying capacity have been increased, improved practicability, the conical surface of bulge loop 2 can dispersed axial force to each tapered roller 3, reduced the loss in using, outer ring 7 lateral vertical axis can improve force structure intensity, and reduce tapered roller 3 operation vibrations.

Described going to the bottom 11 equals to go to the bottom 11 centers of circle to inner ring 1 axial line distance and upper base 10 centers of circle to the ratio of inner ring 1 axial line distance with upper base 10 radius ratios, realize the complete rolling friction of tapered roller 3 and inner ring 1 and outer ring 7, can not produce relative sliding friction, the heat having produced while having reduced operation noise and operation, practicability and working life have been improved, described groove 8 inner peripheral surfaces are provided with the restraining groove for spacing cylindrical roller 3, make cylindrical roller 3 can, because of the unbalance stress phenomenon of blocking or skid etc., not improve product reliability and practicability.

The above makes preferred implementation of the present utility model, does not depart from for the person of ordinary skill of the art under the prerequisite of the utility model principle, can also make some modification and improvement, and these also should be considered as protection domain of the present utility model.

Claims (6)

1. a main bearing, comprise inner ring, outer ring, between described inner ring and outer ring, be provided with some tapered rollers, it is characterized in that: described inner ring is provided with bulge loop outward, described outer ring inner peripheral surface is provided with annular groove, described tapered roller is symmetrically distributed in bulge loop both sides, described each tapered roller conical surface contacts with bulge loop end face and groove side average line, between described groove inner peripheral surface and bulge loop outer peripheral surface, be provided with some cylindrical rollers, described tapered roller and cylindrical roller are respectively equipped with circular cone holder and cylinder retainer.

2. a kind of main bearing according to claim 1, is characterized in that: outside described outer ring, be arranged with self-aligning ring, described self-aligning ring and outer ring are slidably connected, and the surface of contact of described outer ring and self-aligning ring is arc surface.

3. a kind of main bearing according to claim 1 and 2, it is characterized in that: described bulge loop both ends of the surface are the conical surface, described bulge loop inner peripheral surface axial width is greater than outer peripheral surface axial width, described tapered roller comprises upper base and goes to the bottom, described upper base radius is less than the radius towards inner ring axis direction of going to the bottom, described in the inner ring axis direction dorsad of going to the bottom.

4. a kind of main bearing according to claim 3, is characterized in that: described groove side is perpendicular to inner ring axis.

5. a kind of main bearing according to claim 4, is characterized in that: described in go to the bottom and equal to go to the bottom the center of circle to inner ring axis distance and the upper base center of circle to inner ring axis ratio of distances constant with upper base radius ratio.

6. according to a kind of main bearing described in claim 2 or 5, it is characterized in that: described groove inner peripheral surface is provided with the restraining groove for spacing cylindrical roller.