CN218992125U

CN218992125U - Double-row bearing for shield machine

Info

Publication number: CN218992125U
Application number: CN202223414909.0U
Authority: CN
Inventors: 周军; 胡学军; 吴小亮
Original assignee: CHANGZHOU CRONOS SPECIAL BEARING MANUFACTURE CO LTD
Current assignee: CHANGZHOU CRONOS SPECIAL BEARING MANUFACTURE CO LTD
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-05-09
Anticipated expiration: 2032-12-20

Abstract

The utility model relates to the technical field of bearings, in particular to a double-row bearing for a shield machine, which comprises an outer ring, an inner ring, a retainer arranged between the outer ring and the inner ring and balls arranged on the retainer, wherein a plurality of mounting holes are formed in the retainer, the balls are mounted in the mounting holes, and the width of the mounting holes is smaller than the diameter of the balls. The utility model relates to a double-row bearing for a shield machine, wherein balls are uniformly arranged on an inner ring through mounting holes on a retainer, so that each ball is uniformly stressed, the height of the retainer is lower than the axis of the ball, more balls can be arranged in the bearing, the balls incline outwards, the surface area of an outer ring is increased, and the bearing can bear larger load.

Description

Double-row bearing for shield machine

Technical Field

The utility model relates to the technical field of bearings, in particular to a double-row bearing for a shield machine.

Background

Bearings are an important component in contemporary mechanical devices. Its main function is to support the mechanical rotator, reduce the friction coefficient in the course of its movement and ensure its rotation accuracy. Particularly, the bearing used on the shield machine needs to bear large axial force, and when the shield machine is fully loaded, the bearing load is large, so that the service life of the bearing is reduced to a certain extent, and therefore, the quantity of the balls is also important while the high quality of the materials of the balls in the bearing is ensured.

Disclosure of Invention

The utility model aims to solve the technical problems that: in order to overcome the technical problems in the prior art, the utility model provides a double-row bearing for a shield machine, which comprises an outer ring, an inner ring, a retainer arranged between the outer ring and the inner ring and balls arranged on the retainer, wherein a plurality of mounting holes are formed in the retainer, the balls are mounted in the mounting holes, and the width of the mounting holes is smaller than the diameter of the balls.

Further, the retainer comprises a supporting part, a connecting part and a shielding part, wherein the supporting part and the shielding part are respectively positioned at two ends of the connecting part, and are connected to form a Z shape,

the mounting hole is formed in the connecting part;

the shielding part is propped against the inner ring;

the support portion abuts against the outer ring.

Further, the number of the retainers is two, and the supporting portions of two adjacent retainers are propped against each other.

Further, a spacer bush is arranged between the supporting part and the outer ring.

Further, two grooves are formed on the inner ring, wherein,

the two grooves are respectively attached to the side walls of the balls on the two retainers.

Further, the groove is obliquely arranged, and one end of the groove, which is close to the spacer bush, is higher than one end of the groove, which is far away from the spacer bush.

Further, the inner wall of the outer ring is arc-shaped and is attached to the balls.

The beneficial effects are that: the utility model relates to a double-row bearing for a shield machine, wherein balls are uniformly arranged on an inner ring through mounting holes on a retainer, so that each ball is uniformly stressed, the height of the retainer is lower than the axis of the ball, more balls can be arranged in the bearing, the balls incline outwards, the surface area of an outer ring is increased, and the bearing can bear larger load.

Drawings

FIG. 1 is a first schematic illustration of the internal structure of a bearing of the present utility model;

FIG. 2 is a second schematic view of the internal structure of the bearing of the present utility model;

FIG. 3 is a third schematic view of the internal structure of the bearing of the present utility model;

FIG. 4 is a schematic view of the structure of the cage of the present utility model;

FIG. 5 is a schematic view of the bearing inner race structure of the present utility model;

in the figure:

100. outer ring 110, inner ring 111, groove 120, retainer 121, mounting hole,

122. ball, 123, supporting part, 124, connecting part, 125, shielding part, 130 and spacer bush.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the utility model. In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may include one or more of the feature, either explicitly or implicitly. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

Example 1

As shown in fig. 1 to 5, a double-row bearing for a shield machine comprises an outer ring 100, an inner ring 110, a retainer 120 arranged between the outer ring 100 and the inner ring 110, and balls 122 arranged on the retainer 120, wherein a plurality of mounting holes 121 are formed in the retainer 120, the balls 122 are mounted in the mounting holes 121, and the width of the mounting holes 121 is smaller than the diameter of the balls 122. The inner ring 110 is located at the inner side of the outer ring 100, the retainer 120 is located between the inner ring 110 and the outer ring 100 and is attached to the inner ring 110, the mounting holes 121 are uniformly formed in the retainer 120, each mounting hole 121 corresponds to one ball 122, the balls 122 roll in the mounting holes 121, the width direction of the mounting holes 121 is two sides attached to curved surfaces of the balls 122, the balls 122 roll in the mounting holes 121, the bottoms of the balls 122 are attached to the inner ring 110, and the balls 122 are uniformly arranged between the outer ring 100 and the inner ring 110 through the mounting holes 121. The width of the mounting hole 121 is smaller than the diameter of the balls 122, so that more balls 122 can be put in, and the bearing capacity is improved.

The holder 120 includes a supporting portion 123, a connecting portion 124, and a shielding portion 125, where the supporting portion 123 and the shielding portion 125 are respectively located at two ends of the connecting portion 124, and the supporting portion 123 and the shielding portion 125 are connected to form a Z shape, and the mounting hole 121 is formed on the connecting portion 124; the shielding part 125 is abutted against the inner ring 110; the support 123 abuts against the outer ring 100. One end of the supporting portion 123 is fixedly arranged at one end of the connecting portion 124, the other end of the supporting portion abuts against the outer ring 100, one end of the shielding portion 125 is fixedly arranged at the other end of the connecting portion 124, the other end of the shielding portion 125 abuts against the inner ring 110, the supporting portion 123 and the shielding portion 125 are connected together by the connecting portion 124, and the connecting portion 124 is arranged between the inner ring 110 and the outer ring 100 in an overhead mode by the supporting portion 123 and the shielding portion 125, so that the balls 122 roll in the mounting holes 121.

The number of the holders 120 is two, and the supporting portions 123 of two adjacent holders 120 are abutted against each other. Both retainers 120 are disposed between the outer ring 100 and the inner ring 110, and the supporting portions 123 of both retainers 120 are attached to each other.

A spacer 130 is further disposed between the supporting portion 123 and the outer ring 100. The spacer 130 is located between the outer ring 100 and the supporting portion 123, the spacer 130 can change the thickness thereof to adjust the play, can bear radial load and bidirectional axial load at the same time, and can limit bidirectional axial displacement of the outer ring 100 within the bearing play range.

Two grooves 111 are formed in the inner ring 110, wherein the two grooves 111 are respectively attached to side walls of the balls 122 on the two retainers 120. The groove 111 is suitable for placing the ball 122, so that the ball 122 rotates in the groove 111, the size of the groove 111 is matched with the size of the ball 122, the radian of the groove 111 is the same as that of the side wall of the ball 122, the ball 122 rolls smoothly in the groove 111, and impurities such as dust can be prevented from entering between the ball 122 and the inner ring 110.

The groove 111 is obliquely arranged, and one end of the groove 111, which is close to the spacer 130, is higher than one end of the groove 111, which is far away from the spacer 130. The inclined arrangement of the grooves 111 may cause the balls 122 rolling in the grooves 111 to also be inclined outwardly.

The inner wall of the outer ring 100 is arc-shaped and is attached to the balls 122. The radian of the inner wall of the outer ring 100 is the same as the radian of the side wall of the ball 122, so that the side wall of the ball 122 is completely attached to the inner wall of the outer ring 100, the ball 122 can be smoother when the inner wall of the outer ring 100 rolls, and impurities such as dust can be prevented from entering between the ball 122 and the outer ring 100.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims

1. The utility model provides a shield constructs machine biserial bearing, includes outer lane, inner circle, sets up the holder and the ball of setting on the holder between outer lane and the inner circle, its characterized in that:

the retainer is provided with a plurality of mounting holes, the balls are mounted in the mounting holes, and the width of each mounting hole is smaller than the diameter of each ball.

2. The double-row bearing for a shield machine according to claim 1, wherein:

the retainer comprises a supporting part, a connecting part and a shielding part, wherein the supporting part and the shielding part are respectively positioned at two ends of the connecting part, and are connected to form a Z shape,

the mounting hole is formed in the connecting part;

the shielding part is propped against the inner ring;

the support portion abuts against the outer ring.

3. The double-row bearing for a shield machine according to claim 2, wherein:

the number of the retainers is two, and the supporting parts of two adjacent retainers are propped against each other.

4. A double row bearing for a shield machine according to claim 3, wherein:

and a spacer bush is further arranged between the supporting part and the outer ring.

5. The double-row bearing for the shield machine according to claim 4, wherein:

two grooves are formed on the inner ring, wherein,

6. The double-row bearing for the shield machine according to claim 5, wherein:

the groove is obliquely arranged, and one end of the groove, which is close to the spacer bush, is higher than one end of the groove, which is far away from the spacer bush.

7. The double-row bearing for a shield machine according to claim 1, wherein:

the inner wall of the outer ring is arc-shaped and is attached to the ball.