CN217539334U

CN217539334U - Multi-row roller mounted split bearing of rotating shaft with radial hold-down

Info

Publication number: CN217539334U
Application number: CN202221818578.4U
Authority: CN
Inventors: 潘致程
Original assignee: Zhejiang Yawei Precision Machine Tool Co Ltd
Current assignee: Zhejiang Yawei Precision Machine Tool Co Ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-10-04
Anticipated expiration: 2032-07-13

Abstract

The utility model discloses a concatenation bearing of multirow roller installation of pivot with radial closing device, including outer lane and inner circle, the outer lane inner wall is equipped with the interior raceway of multirow, and the inner circle cover is in the outer lane, and the inner circle outer wall is equipped with the outer raceway of multirow, and a plurality of rollers are restricted between outer raceway and interior raceway, and the outer lane is split into local module one and local module two at least, and the subdivision line of local module one and local module two extends along the axial of outer lane, and the subdivision line is through all interior raceways. Compared with the prior art, the utility model has the advantages of through the interior raceway of outer lane axial subdivision all, a plurality of rollers can be installed smoothly to the outer lane between raceway and the outer raceway of inner circle, very easily realize in the bearing that three rows reach the roller installation more than three rows.

Description

Multi-row roller mounted split bearing of a rotating shaft with radial hold-down

Technical Field

The utility model relates to a bearing technical field relates to the concatenation bearing, especially relates to the concatenation bearing of multirow roller installation of pivot with radial closing device.

Background

The radial ball bearing is the most easily made bearing with high precision and highest limit rotating speed in all rolling bearings, has wide application, but can only realize double-row rollers due to the limit of an assembly process, and cannot adapt to precision mechanical shafts and precision electric spindles which are required to work under the working conditions of high precision, high rotating speed and heavy load because three rows or more cannot be realized.

The multi-row angular contact bearing combination is adopted for a plurality of main shafts and electric main shaft bearings which require high precision, high rotating speed and extra large load, but when the multi-row angular contact bearing is used, the front support and the rear support are both provided with the multi-row angular contact bearing, axial over-positioning can be caused actually, when the main shaft or the electric main shaft generates heat, the shaft can be extended or shortened, so that the axial clearance of the bearing is reduced, interference fit is caused, severe friction between a bearing roller and a bearing ring is caused, and the rotating efficiency of the bearing is influenced.

Some patents, as granted under the publication number CN216742454U, provide a self-adjustable spindle structure, in which the spindle drives the inner ring of the bearing to rotate toward one side by magnetic attraction, and the movable roller is clamped by the inner ring and the outer ring to move at one side.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem of the unable roller installation more than three rows and three rows of realization of current bearing, the utility model aims to solve the technical problem that a concatenation bearing of multirow roller installation that has radial closing device's pivot of three rows of rollers and three rows of more than can install is provided.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a multi-row roller mounted split bearing of a rotating shaft having a radial hold down comprising:

the inner wall of the outer ring is provided with a plurality of rows of inner raceways;

the inner ring is sleeved in the outer ring, the outer wall of the inner ring is provided with a plurality of rows of outer raceways, and the rollers are limited between the outer raceways and the inner raceways;

the outer ring is at least split into a first partial module and a second partial module, split lines of the first partial module and the second partial module extend along the axial direction of the outer ring and pass through all the inner raceways,

the first partial module is opened and exposes out of the multiple rows of outer raceways of the inner ring, and when the rollers are placed in the multiple rows of outer raceways, the second partial module and the first partial module are spliced to form a complete outer ring.

The utility model discloses further preferred scheme does: when the first local module is opened, a retainer for limiting the arrangement of the rollers is arranged, the retainer and a plurality of rollers are placed in the outer raceways, and the second local module and the first local module are spliced to limit the rollers and the retainer from being separated from the inner raceways and the outer raceways.

The utility model discloses further preferred scheme does: the inner raceway of the first local module is of primary precision, the inner raceway of the second local module is of secondary precision, the precision of the second local module is greater than that of the first local module, when the outer ring or the inner ring is acted by an external force, the inner ring and the outer ring are eccentric, and the second local module of the outer ring and the inner ring jointly extrude the roller.

The utility model discloses further preferred scheme does: the outer ring is axially split and radially split to obtain the first local module and the second local module, and split surfaces obtained by axial splitting on the first local module and the second local module are intersected with split surfaces obtained by radial splitting.

The utility model discloses further preferred scheme does: the axial split surface of the outer ring passes through the axis of the outer ring.

The utility model discloses further preferred scheme does: the first local module comprises an axial splitting surface A and a radial reference surface A, the second local module comprises an axial splitting surface B and a radial reference surface B, the radial reference surface A is higher than the radial reference surface B, the axial splitting surface A is attached to the axial splitting surface B, the radial reference surface A is attached to the radial reference surface B, and the first local module and the second local module are fixed through screws.

The utility model discloses further preferred scheme does: and screws are radially inserted into the first local module and the second local module, penetrate through the radial reference surface A and the radial reference surface B, and are fixedly connected with the first local module and the second local module.

The utility model discloses further preferred scheme does: the first local module and the second local module are provided with mounting holes for inserting screws, the mounting holes are communicated with the radial reference surface A or the radial reference surface B, and countersunk holes for hiding screws and nuts are formed in the first local module or the second local module.

The utility model discloses further preferred scheme does: an undivided base ring is arranged on the second local module, and a radial reference surface B on the second local module is arranged on the base ring.

The utility model discloses further preferred scheme does: the outer ring is provided with a plurality of axially-penetrating through holes, and the outer ring is axially split to avoid the through holes.

Compared with the prior art, the utility model has the advantages that,

1. all the inner raceways are axially split by the outer ring, and a plurality of rollers can be smoothly installed between the inner raceways of the outer ring and the outer raceways of the inner ring, so that the installation of three rows or more of rollers in the bearing is easily realized;

2. through the treatment of different precisions of the inner raceways on the first local module and the second local module, the processing cost is reduced, meanwhile, the bearing can be suitable for the use of a rotating shaft with a radial pressing device, when the rotating shaft drives the inner ring to rotate towards one side by the radial pressing device, the movable roller is clamped by the second local module of the inner ring and the outer ring, and the rotation towards one side of the second local module is smoother due to the fact that the precision of the second local module is greater than that of the first local module.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are merely drawn for the purpose of illustrating the preferred embodiments and therefore should not be considered as limiting the scope of the present invention, and that, unless otherwise indicated, the drawings merely illustrate conceptually and may contain exaggerated displays of the composition or construction of objects described, and are not necessarily drawn to scale.

FIG. 1 is a schematic structural view of a splicing bearing according to a preferred embodiment of the present invention;

FIG. 2 is one of the cross-sectional views of the split bearing according to the preferred embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the portion A in FIG. 2 according to the preferred embodiment of the present invention;

FIG. 4 is a second cross-sectional view of the split bearing according to the preferred embodiment of the present invention;

FIG. 5 is an exploded view of a split bearing according to a preferred embodiment of the present invention;

fig. 6 is a schematic view of the application state of the splicing bearing according to the preferred embodiment of the present invention.

In the figure: 1. the outer ring comprises an outer ring 1a, a local module I, a local module 1a1, an axial splitting surface A, a local module A2, a radial reference surface A, a local module II, a local module 1B1, an axial splitting surface B, a local module 1B2, a radial reference surface B, a local module 1B3, a base ring 11, an inner rolling way 12, a mounting hole 13, a counter bore 14 and a through hole; 2. an inner race, 21, an outer race; 3. a roller; 4. a holder; 5. a screw; 6. a radial hold down; 7. a rotating shaft.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and those skilled in the art will appreciate that these descriptions are illustrative only, exemplary and should not be construed as limiting the scope of the present invention.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

The embodiment mainly describes a multi-row roller-mounted split bearing with a rotating shaft having a radial pressing device, which can be mounted with three or more rows of rollers, and the specific details are as follows:

as shown in fig. 1 to 5, the multi-row roller-mounted split bearing of the rotating shaft with the radial pressing device includes an outer ring 1, an inner ring 2 and a plurality of rollers 3, the number of the outer ring 1 and the inner ring 2 is one, the inner wall of the outer ring 1 is provided with a plurality of rows of inner raceways 11, the outer wall of the inner ring 2 is provided with a plurality of rows of outer raceways 21, the plurality of rollers 3 are arranged between the outer raceways 21 and the inner raceways 11 in a limited manner, the plurality of rollers 3 assist the outer raceways 21 to rotate relative to the inner raceways 11, and preferably, at least three rows of the inner raceways 11 on the outer ring 1 and the outer raceways 21 on the inner ring 2 are provided.

In order to facilitate installation of the plurality of rollers 3, the outer ring 1 is divided into a first local module 1a and a second local module 1b, dividing lines of the first local module 1a and the second local module 1b extend along the axial direction of the outer ring 1, and the dividing lines pass through all inner raceways 11 on the outer ring 1.

Preferably, the outer ring 1 can be split into at least three pieces.

Because the partial module 1a and the partial module 1B are split, the split part of the partial module 1a forms an axial split surface A1 and a radial reference surface A1a2, the split part of the partial module 1B forms an axial split surface B1 and a radial reference surface B1B2, preferably, the partial module 1B may be provided with an undivided base ring 1B3, and the radial reference surface B1B2 of the partial module 1B is provided with the base ring 1B 3.

In order to facilitate the placement of the second partial module 1B on the first partial module 1a, the radial reference plane A1a2 may be disposed higher than the radial reference plane B1B2, i.e., the radial radius of the first partial module 1a is larger than the radial radius of the second partial module 1B.

The local module I1 a and the local module II 1B are respectively provided with a plurality of mounting holes 12 which are radially arranged, the positions of the mounting holes 12 on the local module I1 a and the local module II 1B correspond to each other in a one-to-one mode, the mounting holes 12 are communicated with an axial splitting surface A1A1 or an axial splitting surface B1B1, the mounting holes 12 on the local module I1 a or the local module II 1B are arranged in a penetrating mode, and a countersunk hole 13 is formed in one end, far away from a radial reference surface, of the mounting hole 12 on the local module I1 a or the local module II 1B, which is arranged in a penetrating mode.

The first local module 1a and the second local module 1b are inserted into the mounting hole 12 through the screw 5 and are in threaded connection, the nut of the screw 5 can be hidden in the counter bore 13, the rotating installation of the radial outer wall surface of the outer ring 1 is not affected, and preferably, the counter bore 13 and the mounting hole 12 are coaxially arranged.

In order to facilitate the installation of the splicing bearing, a plurality of through holes 14 which axially penetrate through are formed in the outer ring 1, and when the outer ring 1 is axially split, the split lines which are axially split avoid the through holes 14, so that the coaxiality between the first local module 1a and the second local module 1b can be conveniently calibrated.

When the inner ring 2, the plurality of rollers 3 and the outer ring 1 obtained by fixing the partial module I1 a and the partial module II 1B are assembled, the retainer 4 positioned between the inner ring 2 and the outer ring 1 is arranged, the retainer 4 is used for limiting the arrangement of the rollers 3, the partial module I1 a is taken down, the retainer 4 is arranged in the partial module II 1B, the inner ring 2 is inserted into the retainer 4, the plurality of rollers 3 are arranged between the inner rolling path 11 of the partial module II 1B and the outer rolling path 21 of the inner ring 2 through the retainer 4, the partial module I1 a is covered, the axial splitting surface A1A1 is attached to the axial splitting surface B1B1, the radial reference surface A1a2 is attached to the radial reference surface B1B2, the screws 5 are inserted in the radial direction, the screws 5 fixedly connect the partial module I1 a and the partial module II 1B, preferably, the positions of the inner rolling paths 11 on the partial module I1 a and the partial module II 1B correspond to and are communicated with each other, and the positions of the through holes 14 on the partial module I1 a and the partial module II 1B correspond to each other.

Because the outer ring 1 is divided into the first local module 1a and the second local module 1b, the inner rolling ways 11 on the first local module 1a and the second local module 1b can be processed into two different accuracies, wherein the inner rolling way 11 of the first local module 1a is of primary accuracy, the inner rolling way 11 of the second local module 1b is of secondary accuracy, and the accuracy of the second local module 1b is greater than that of the first local module 1a, namely, the inner rolling way 11 of the second local module 1b is smoother than that of the inner rolling way 11 of the first local module 1 a.

As shown in fig. 6, the splicing bearing of this embodiment is applied to a spindle shaft 7 structure of an electric spindle capable of being automatically adjusted provided by the patent with the publication number CN216742454U, the outer ring 1 is fixed, the shaft 7 is inserted into the inner ring 2 for installation, the shaft 7 can drive the inner ring 2 to rotate, at this time, the second local module 1b is close to the radial pressing device 6, the shaft 7 drives the inner ring 2 of the bearing to be deviated to one side of the second local module 1b for rotation through magnetic attraction, the roller 3 is attached to the inner raceway 11 of the second smoother local module 1b, and the rotation of the shaft 7 is smoother.

Preferably, the radial pressing device 6 can also adopt a form of pressing through spring force, so that the rotating shaft 7 drives the inner ring 2 of the bearing to rotate towards the side where the local module two 1b is located.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The above is right the utility model provides a concatenation bearing of multirow roller installation of pivot with radial closing device has carried out detailed introduction, and it is right that this paper has used specific individual example the utility model discloses a principle and implementation mode have been elucidated, and the description of above embodiment is only used for helping to understand the utility model discloses and core thought, it should point out, to the ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also be right the utility model discloses a plurality of improvements and embellishments are carried out, and these improvements and embellishments also fall into the scope of protection of the claim of the utility model.

Claims

1. A multi-row roller mounted split bearing of a rotating shaft having a radial hold down comprising:

the outer ring is at least divided into a first partial module and a second partial module, dividing lines of the first partial module and the second partial module extend along the axial direction of the outer ring and pass through all the inner roller paths,

2. The multi-row roller-mounted split bearing with a rotating shaft having a radial pressing device as claimed in claim 1, wherein the first partial module is provided with a retainer for limiting the arrangement of the rollers when opened, the retainer and the plurality of rollers are placed in the multi-row outer raceway, and the second partial module is combined with the first partial module to limit the rollers from being separated from the inner raceway and the outer raceway from the retainer.

3. The multi-row roller mounted split bearing of a rotating shaft with a radial compression device as claimed in claim 1, wherein the inner raceway of the first local module is of primary accuracy, the inner raceway of the second local module is of secondary accuracy, the accuracy of the second local module is greater than that of the first local module, when the outer ring or the inner ring is subjected to an external force, the inner ring and the outer ring are eccentric, and the second local module of the outer ring and the inner ring jointly press the rollers.

4. The multi-row roller mounted split bearing with a shaft having radial compression means of claim 1, wherein said outer race is formed by axially and radially splitting said first and second partial blocks, and wherein axially split planes on said first and second partial blocks intersect radially split planes.

5. The multi-row roller-mounted split bearing of a rotating shaft with a radial compression device as claimed in claim 4, wherein the axial split plane of the outer ring passes through the axial center of the outer ring.

6. The multi-row roller mounted split bearing with a rotating shaft having a radial compression means as claimed in claim 4, wherein the first partial module comprises an axial split surface A and a radial reference surface A, the second partial module comprises an axial split surface B and a radial reference surface B, the radial reference surface A is higher than the radial reference surface B, the axial split surface A is attached to the axial split surface B, the radial reference surface A is attached to the radial reference surface B, and the first partial module and the second partial module are fixed by screws.

7. The multi-row roller-mount split bearing of a rotating shaft with a radial compression device as claimed in claim 6, wherein the first and second partial modules are radially inserted with screws passing through the radial reference plane A and the radial reference plane B, and the screws fixedly connect the first and second partial modules.

8. The multi-row roller-mounted split bearing of a rotating shaft with a radial pressing device as claimed in claim 7, wherein the first partial module and the second partial module are provided with mounting holes for inserting screws, the mounting holes are communicated with the radial reference plane A or the radial reference plane B, and the first partial module or the second partial module is provided with countersunk holes for hiding screws and nuts.

9. The multi-row roller-mounted split bearing with a rotating shaft having a radial pressing device as claimed in claim 6, wherein the second partial module is provided with an undivided base ring, and the radial reference surface B of the second partial module is provided on the base ring.

10. The multi-row roller mounted split bearing of a rotating shaft with a radial compression device as claimed in claim 1 or 4, wherein the outer ring is provided with a plurality of axially penetrating through holes, and the outer ring is axially split to avoid the through holes.