CN211175000U

CN211175000U - YRT bearing for high-precision rotary table

Info

Publication number: CN211175000U
Application number: CN201922286918.8U
Authority: CN
Inventors: 魏纪伟; 林少卿
Original assignee: Luoyang Boying Bearing Co ltd
Current assignee: Luoyang Boying Bearing Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-08-04
Anticipated expiration: 2029-12-19

Abstract

The utility model belongs to the technical field of the bearing, a high accuracy YRT bearing for revolving stage is proposed. The YRT bearing for the high-precision turntable is provided with an inner ring; the outer diameter surface of the inner ring is provided with an annular notch; the bottom surface of the annular notch groove is also provided with an inward sunken annular roller path; the inner ring is placed on the seat ring, and the seat ring and the annular notch on the inner ring jointly form an annular cavity for accommodating the bearing rotating body; the bearing rotating body protrudes out of the annular cavity; a directed cylindrical roller is arranged between the inner diameter surface of the bearing rotating body and the bottom surface of the annular roller path; an axial tapered roller I is arranged between the upper end surface of the bearing rotating body and the inner wall surface of the annular notch of the inner ring; an axial tapered roller II is arranged between the lower end face of the bearing rotor and the seat ring. The utility model discloses a perfect roll cooperation between outer lane and the rolling element in the bearing has reduced the kinetic friction of bearing, has improved the precision and the life of bearing, has reduced manufacturing cost.

Description

YRT bearing for high-precision rotary table

Technical Field

The utility model belongs to the technical field of the bearing, concretely relates to YRT bearing for high accuracy revolving stage.

Background

In the application occasions requiring high-precision numerical control rotary table, such as the application fields of a radar station parabolic antenna, a high-precision numerical control machining center and the like, the YRT bearing needs to be applied, but in the structural composition of the YRT bearing at present, the most critical axial stressed rolling body consists of an upper row of cylindrical rollers and a lower row of cylindrical rollers (the bearings are horizontally arranged), the spinning axial direction of a single cylindrical roller points to the axle center of a common rotating shaft of a plurality of rollers in the rotating state in work, the circumferences of the circumferences with different radiuses are different according to the circumferential ratio and the circumference theorem, the distances between the end surfaces at two ends of the cylindrical rollers and the common rotating center are unequal, so the circumferences of the circumferences formed by the two ends of the rollers around the common rotating center (the two words are removed) are unequal, but the rollers used by the YRT bearing at present are in the cylindrical structure with the two ends being equal circles, and the distances rolled by the two ends of the cylinders with the two ends being equal circles are equal, the cylindrical roller with equal rolling distance at two ends is adapted to the working state with unequal rolling distance, and can cause radial stress of the roller and radial movement, so that the rolling friction resistance of the whole bearing is increased, the dynamic balance is unstable, the service life is reduced, the manufacturing cost is high, and the like.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a high accuracy YRT bearing for revolving stage.

The utility model adopts the following technical scheme for accomplishing the above purpose:

a YRT bearing for a high-precision turntable is provided, which is provided with an inner ring fixedly connected with a fixing device; the outer diameter surface of the inner ring is provided with an annular notch; the bottom surface of the annular notch groove is also provided with an inward sunken annular roller path; the inner ring is placed on the seat ring; the race and the annular notch on the inner ring jointly form an annular cavity for accommodating the bearing rotor; a bearing rotating body is placed in an annular cavity between the annular notch of the inner ring and the seat ring; the bearing rotating body protrudes out of the annular cavity; radial cylindrical rollers uniformly distributed along the circumference are arranged between the inner diameter surface of the bearing rotating body and the bottom surface of the annular roller path; axial tapered rollers I which are uniformly distributed along the circumference are arranged between the upper end surface of the bearing rotating body and the inner wall surface of the annular notch of the inner ring; axial tapered rollers II which are uniformly distributed along the circumference are arranged between the lower end surface of the bearing rotating body and the seat ring; the axial tapered roller I and the axial tapered roller II are in a cone frustum shape with diameters gradually expanded from inside to outside.

The upper end face and the lower end face of the bearing rotor are provided with notches for placing the axial tapered rollers.

And a rolling element retainer I used for placing the axial tapered roller I is arranged between the bearing rotating body and the inner ring.

And a rolling element retainer II used for placing an axial tapered roller II is arranged between the bearing rotating body and the inner ring.

The utility model provides a pair of YRT bearing for high accuracy revolving stage, two axial rollers all adopt tapered roller from inside to outside gradual expansion, have realized perfect rolling cooperation between bearing inner and outer lane and the rolling element, have reduced the kinetic friction power of bearing, have improved the precision and the life of bearing, have reduced manufacturing cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a structural sectional view of the present invention.

In the figure: 1. the bearing comprises an inner ring, 2, a seat ring, 3, rolling element retainers I and 4, axial tapered rollers I and 5, radial cylindrical rollers 6, a bearing rotor 7, rolling element retainers II and 8, axial tapered rollers II and 9 and connecting holes.

Detailed Description

The invention is described in connection with the accompanying drawings and the embodiments:

as shown in fig. 1 and 2, a YRT bearing for a high-precision turntable has an inner ring 1 for fixedly coupling with a fixture; the outer diameter surface of the inner ring 1 is provided with an annular notch; the bottom surface of the annular notch groove is also provided with an inward sunken annular roller path; the inner ring 1 is placed on the seat ring 2, and different components are combined into a whole by fixedly connecting the screw with the seat ring 2; the race 2 and the annular groove on the inner ring 1 jointly form an annular cavity for accommodating a bearing rotor; a bearing rotating body 6 is arranged in an annular cavity between the annular notch of the inner ring 1 and the seat ring 2; the bearing rotor 6 protrudes out of the annular cavity; radial cylindrical rollers 5 uniformly distributed along the circumference are arranged between the inner diameter surface of the bearing rotating body 6 and the bottom surface of the annular roller path; axial tapered rollers I4 which are uniformly distributed along the circumference are arranged between the upper end surface of the bearing rotating body 6 and the inner wall surface of the annular notch of the inner ring; axial tapered rollers II 8 which are uniformly distributed along the circumference are arranged between the lower end surface of the bearing rotating body and the seat ring; the axial tapered roller I4 and the axial tapered roller II 8 are in a cone frustum shape with diameters gradually expanded from inside to outside.

And a rolling element retainer I for placing the axial tapered roller I is arranged between the bearing rotating body and the inner ring and used for preventing the axial tapered roller I4 from generating friction with each other.

And a rolling element retainer II used for placing an axial tapered roller II is arranged between the bearing rotating body and the inner ring and used for preventing the axial tapered roller II 8 from generating friction with each other.

The utility model discloses according to the circumference ratio, the girth theorem, according to the girth of two different radial circumferences that the route formed when bearing both sides axial atress rolling element rolled, calculate the length difference of two circumferences, on the circumference of two cross-sections of rolling element is shared to this difference, calculate two different section radiuses, change the cylinder rolling element into the cone of ideal data, thereby realize perfect roll cooperation between outer lane and the rolling element in the bearing, the kinetic friction of bearing has been reduced, the precision and the life of bearing have been improved, and the production cost is reduced.

Claims

1. A YRT bearing for a high-precision turntable is provided, which is provided with an inner ring fixedly connected with a fixing device; the method is characterized in that: the outer diameter surface of the inner ring is provided with an annular notch; the bottom surface of the annular notch groove is also provided with an inward sunken annular roller path; the inner ring is placed on the seat ring, and the seat ring and the annular notch on the inner ring jointly form an annular cavity for accommodating the bearing rotating body; a bearing rotating body is placed in an annular cavity between the annular notch of the inner ring and the seat ring; the bearing rotating body protrudes out of the annular cavity; radial cylindrical rollers uniformly distributed along the circumference are arranged between the inner diameter surface of the bearing rotating body and the bottom surface of the annular roller path; axial tapered rollers I which are uniformly distributed along the circumference are arranged between the upper end surface of the bearing rotating body and the inner wall surface of the annular notch of the inner ring; axial tapered rollers II which are uniformly distributed along the circumference are arranged between the lower end surface of the bearing rotating body and the seat ring; the axial tapered roller I and the axial tapered roller II are in a cone frustum shape with diameters gradually expanded from inside to outside.

2. A YRT bearing for a high precision turntable as claimed in claim 1, wherein: the upper end face and the lower end face of the bearing rotor are provided with notches for placing the axial tapered rollers.

3. A YRT bearing for a high precision turntable as claimed in claim 1, wherein: and a rolling element retainer I used for placing the axial tapered roller I is arranged between the bearing rotating body and the inner ring.

4. A YRT bearing for a high precision turntable as claimed in claim 1, wherein: and a rolling element retainer II used for placing an axial tapered roller II is arranged between the bearing rotating body and the inner ring.