CN114427566B - Rolling bearing and rotating device - Google Patents

Rolling bearing and rotating device Download PDF

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Publication number
CN114427566B
CN114427566B CN202210041926.XA CN202210041926A CN114427566B CN 114427566 B CN114427566 B CN 114427566B CN 202210041926 A CN202210041926 A CN 202210041926A CN 114427566 B CN114427566 B CN 114427566B
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CN
China
Prior art keywords
wall
roller
flange
cylinder
adjusting surface
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Application number
CN202210041926.XA
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Chinese (zh)
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CN114427566A (en
Inventor
李硕
张韬懿
张文军
王平安
姚冀川
贾文涛
胡小辉
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Beijing Xuanyu Intelligent Technology Co ltd
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Beijing Xuanyu Intelligent Technology Co ltd
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Priority to CN202210041926.XA priority Critical patent/CN114427566B/en
Publication of CN114427566A publication Critical patent/CN114427566A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06—Ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/4605—Details of interaction of cage and race, e.g. retention or centring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The application relates to the technical field of bearing mechanisms, and discloses a rolling bearing, which comprises: comprising the following steps: an inner cylinder; the outer cylinder is sleeved on the inner cylinder; the two or more flanges are arranged on the inner cylinder and/or the outer cylinder, and the inner wall or the outer wall of each flange is provided with a first adjusting surface; the roller group comprises a plurality of rollers, the horizontal central surfaces of the rollers are positioned in the same plane, the plane is perpendicular to the axis of the inner cylinder, the roller group is arranged on the inner wall or the outer wall of the flange, and a second adjusting surface is arranged on the roller group; the second adjusting surface moves along the central axis direction of the inner cylinder relative to the first adjusting surface, and the diameter of the enveloping surface of the roller group is increased or reduced so as to adjust the gap between the enveloping surface of the roller group and the inner cylinder or the outer cylinder. By arranging the first adjusting surface and the second adjusting surface, the radial clearance between the enveloping surface of the roller set and the cylinder wall can be effectively adjusted, so that the roller set and the cylinder wall are uniformly contacted to form an effective support; by means of the roller group, abrasion to the surface of the cylinder wall can be reduced. The application also discloses a rotating device.

Description

Rolling bearing and rotating device
Technical Field
The present application relates to the technical field of bearing mechanisms, and for example, to a rolling bearing and a rotating device.
Background
In the rotary joint of the mechanical structure, when the inner cylinder of the rotary joint infinitely rotates in the outer cylinder, bearings are generally used as supporting and guiding structures to ensure good motion accuracy of the rotary device, and the existing bearing structures are generally classified into rolling bearings with balls or rollers and radial sliding bearings.
The rolling bearing with the balls or rollers has rolling friction between the balls or rollers and the inner ring and the outer ring, has small resistance and abrasion during rotation and higher precision, and can bear larger loads in all directions such as radial direction, axial direction, bending moment and the like; the radial sliding bearing is generally a shaft sleeve or bearing bush structure, is manufactured by adopting a metal or nonmetal material with better wear resistance and smaller friction coefficient, has sliding friction with a shaft or a hole to be supported, has larger resistance during rotation, has higher requirements on lubrication conditions during operation, and is easy to wear under dry friction conditions without lubrication.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
in the above-mentioned bearing, limited by the processing precision of the large-diameter thin-walled cylinder, the existing rolling bearing is difficult to install in pairs to form a structure with two ends supported; only one rolling bearing is arranged to form a cantilever structure with one end supported, so that the supporting rigidity cannot be ensured and the cylinder body is easy to deform; when the radial sliding bearing is adopted, the sliding friction resistance is larger under the non-lubrication condition, the abrasion between the bearing and the surface of the cylinder body is serious, and the fit clearance between the shaft and the hole is enlarged, so that the use is influenced.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a rolling bearing and a rotating device, which can effectively adjust the radial clearance between the enveloping surface of a roller group and a cylinder wall, improve the motion precision of a rotating joint, effectively reduce the abrasion to the cylinder wall, and further prolong the service life of the bearing.
In some embodiments, a rolling bearing, an inner barrel; the outer cylinder is sleeved on the inner cylinder; the two or more flanges are arranged on the inner cylinder and/or the outer cylinder, and the inner wall or the outer wall of each flange is provided with a first adjusting surface; the roller group is arranged on the inner wall or the outer wall of the flange and is provided with a second adjusting surface, and the second adjusting surface is abutted with the first adjusting surface; the second adjusting surface moves relative to the first adjusting surface along the central axis direction of the inner cylinder, and the diameter of the enveloping surface of the roller group is increased or reduced so as to adjust the gap between the enveloping surface of the roller group and the inner cylinder or the outer cylinder; the roller group comprises a plurality of rollers, the horizontal central planes of the rollers are positioned in the same plane, and the plane is perpendicular to the axis of the inner cylinder; when the outer wall of the flange is provided with a first adjusting surface, the wheel surfaces of a plurality of rollers in the roller group are abutted with the inner wall of the outer cylinder and roll along the circumferential direction of the inner wall; when the inner wall of the flange is provided with a first adjusting surface, the wheel surfaces of a plurality of rollers in the roller group are abutted with the outer wall of the inner cylinder and roll along the circumferential direction of the outer wall.
In some embodiments, a rotating device includes the rolling bearing of the previous embodiments.
The rolling bearing and the rotating device provided by the embodiment of the disclosure can realize the following technical effects:
the radial gap between the roller set and the cylinder wall can be effectively adjusted by arranging the first adjusting surface and the second adjusting surface, so that the roller set and the cylinder wall are uniformly contacted to form an effective support; the wear to the outer wall of inner tube and/or the inner wall surface of urceolus can be reduced to one or more roller train that set up, and when inner tube and urceolus were rotated relatively, be rolling friction between roller train and the section of thick bamboo wall, need not to lubricate the bearing to the motion is smooth and easy not to block, has increased antifriction bearing's reliability and life.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
FIG. 1 is a schematic view of a rolling bearing provided in an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a roller set according to an embodiment of the present disclosure;
FIG. 3 is a schematic cross-sectional view of A-A of FIG. 2;
FIG. 4 is a schematic view of a flange provided by an embodiment of the present disclosure;
FIG. 5 is an enlarged partial schematic view of a roller post and flange mounting provided by an embodiment of the present disclosure;
FIG. 6 is an enlarged partial schematic view of a roller in contact with an inner wall of an outer barrel provided by an embodiment of the present disclosure;
fig. 7 is a schematic structural view of another roller set provided in an embodiment of the present disclosure.
Reference numerals:
10: an inner cylinder; 20: an outer cylinder;
30: a roller set; 31: a roller; 32: a retainer; 321: positioning holes; 33: a roller support; 331: a second adjustment surface; 332: a limiting platform; 34: a roller shaft;
40: a flange; 41: a first adjustment surface; 42: limiting the shaft shoulder.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures 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 in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.
In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.
In order to smoothly rotate the drum of the rotating device, the friction resistance of the supporting structure must be small. Generally, a rolling bearing or a radial sliding bearing is adopted, and the requirement on the precision of the mounting support structure is high and is limited by the machining precision of a large-diameter thin-wall cylinder, so that the conventional rolling bearing is difficult to mount in pairs to form a structure with two ends supported; if only one end is supported, the supporting rigidity is difficult to ensure, the cylinder body is easy to deform, and meanwhile, in order to ensure the supporting rigidity, the rotating cylinder, the inner ring and the outer ring are often in interference fit, so that the dismounting is difficult.
The radial sliding bearing can realize multi-point support of a long shaft, but has large sliding friction resistance under the non-lubrication condition, and the fit clearance between the bearing and the shaft and the hole is increased after abrasion. The wall thickness of the shaft sleeve or the bearing bush of the radial sliding bearing is a fixed value, and if the gap between the two shaft sleeves of the bearing is too large, the bearing cannot be adjusted manually, so that the bearing can shake, and the inner side of the bearing sleeve cannot be effectively supported.
In addition, the rolling bearing and the radial sliding bearing in the prior art are required to be selected from the diameter size sequences recommended by the national standard, and when the required diameter is not in the standard sequence, no finished product is available for direct selection, and the cost for nonstandard customization according to the original structure is high.
In summary, the structure of the rolling bearing can be changed to adjust the bearing stiffness between the two drums. As shown in connection with fig. 1 to 5, the present embodiment provides a rolling bearing including: the device comprises an inner cylinder 10, an outer cylinder 20, two or more flanges 40 and a roller set 30, wherein the outer cylinder 20 is sleeved on the inner cylinder 10; two or more flanges 40 provided on the inner cylinder 10 and/or the outer cylinder 20, and the inner wall or the outer wall of the flange 40 is provided with a first adjustment surface 41; the roller group 30 is arranged on the inner wall or the outer wall of the flange 40, and is provided with a second adjusting surface 331, and the second adjusting surface 331 is abutted with the first adjusting surface 41; the second adjusting surface 331 moves along the central axis direction of the inner cylinder relative to the first adjusting surface 41, and increases or decreases the diameter of the envelope surface of the roller set 30, so as to adjust the gap between the envelope surface of the roller set 30 and the inner cylinder 10 or the outer cylinder 20; the roller group 30 comprises a plurality of rollers 31, the horizontal central planes of the rollers 31 are positioned in the same plane, and the plane is perpendicular to the axis of the inner cylinder 10; when the outer wall of the flange 40 is provided with the first adjusting surface 41, the wheel surfaces of the plurality of rollers 31 in the roller group 30 are abutted with the inner wall of the outer cylinder 20 and roll along the circumferential direction of the inner wall; when the first adjusting surface 41 is provided on the inner wall of the flange 40, the surfaces of the plurality of rollers 31 in the roller group 30 contact the outer wall of the inner cylinder 10 and roll along the outer wall circumference.
By adopting the rolling bearing of the embodiment of the disclosure, the radial clearance between the roller set 30 and the cylinder wall can be effectively adjusted by arranging the first adjusting surface 41 and the second adjusting surface 331, and the processing dimension errors of the inner cylinder 10 and the outer cylinder 20 are compensated, so that the roller set 30 and the cylinder wall are uniformly contacted to form an effective support; the roller group 30 can reduce the abrasion to the outer wall of the inner cylinder 10 and/or the inner wall surface of the outer cylinder 20, and when the inner cylinder 10 and the outer cylinder 20 rotate relatively, the roller group 30 and the cylinder wall are in rolling friction, so that the bearing is not required to be lubricated, the movement is smooth and free from clamping stagnation, and the reliability and the service life of the rolling bearing are improved.
In this embodiment, the flange 40 is attached to the outer cylinder 20 by screws. At this time, the flange 40 is provided at the outer tube 20. In this way, the roller 31 is ensured to be able to abut against the outer wall of the inner cylinder 10.
As shown in fig. 2 and 3, two flanges 40 are provided between the inner tube 10 and the outer tube 20, the flanges 40 are connected to the end of the outer tube 20 by screws, and the wheel surfaces of the plurality of rollers 31 are abutted against the outer wall of the inner tube 10. At this time, when the outer cylinder 20 moves relative to the inner cylinder 10, the plurality of rollers 31 roll on the outer wall of the inner cylinder 10 in the circumferential direction, form multipoint contact with the outer wall of the inner cylinder 10, improve the supporting strength, and simultaneously reduce the abrasion of the outer wall surface of the inner cylinder 10.
Alternatively, the flange 40 is screwed to the inner barrel 10. At this time, the axial end face of the flange 40 is connected to the end of the inner tube 10. In this way, the roller 31 is ensured to be able to abut against the inner wall of the outer tube 20.
In the present embodiment, as shown in fig. 7, two flanges 40 are provided between the inner tube 10 and the outer tube 20, and the axial end surfaces of the flanges 40 are connected to the end portions of the inner tube 10. At this time, the surfaces of the plurality of rollers 31 in the roller group 30 come into contact with the inner wall of the outer tube 20. When the outer cylinder 20 moves relative to the inner cylinder 10, the plurality of rollers 31 roll on the inner wall of the outer cylinder 20 in the circumferential direction to form multi-point contact with the inner wall of the outer cylinder 20, thereby improving the supporting strength and reducing the abrasion of the inner wall surface of the outer cylinder 20.
In the present embodiment, the outer wall of the flange 40 is provided with a first adjustment surface 41. The roller group 30 is provided with a second adjusting surface 331, and the second adjusting surface 331 is abutted against the first adjusting surface 41; the distance between the flange 40 and the holder 32 is adjusted by the screw, so that the first adjustment surface 41 moves on the second adjustment surface 331. The first adjusting surfaces 41 are inclined surfaces uniformly distributed along the circumferential direction of the flange 40 and are in one-to-one correspondence with the positions of the rollers 31.
Here, taking the case that the flange 40 is connected to the outer cylinder 20 by a screw, in this case, the roller set 30 is disposed on the inner wall of the flange 40, and when the roller set 30 is adjusted upward to make the first adjusting surface 41 press the second adjusting surface 331, the roller 31 moves radially inward, so as to reduce the diameter of the inner envelope surface of the roller set 30; when the roller set 30 is adjusted downward, the first adjusting surface 41 reduces the pressing force on the second adjusting surface 331, so that the roller 31 moves radially outward, and the diameter of the inner envelope surface of the roller set 30 is further increased.
In the present embodiment, as shown in fig. 4 and 5, the inner wall of the flange 40 is provided with a first adjusting surface 41, the roller set 30 is provided with a second adjusting surface 331, and the second adjusting surface 331 abuts against the first adjusting surface 41; the second adjusting surface 331 moves along the central axis direction of the inner cylinder 10 relative to the first adjusting surface 41, so as to increase or decrease the diameter of the envelope surface of the roller set 30, so as to adjust the radial gap between the envelope surface of the roller set 30 and the cylinder wall. The first adjusting surface 41 and the second adjusting surface 331 are both inclined structures with low-level portions and high-level portions. Taking the middle position of the second adjusting surface 331 at the first adjusting surface 41 as an example, a plurality of first adjusting surfaces 41 are disposed on the inner wall of the flange 40 corresponding to the position of the roller set 30, the second adjusting surface 331 is disposed on the roller set 30, and the first adjusting surface 41 can be attached to the second adjusting surface 331.
When the radial gap between the envelope surface and the cylinder wall of the roller set 30 needs to be reduced, the relative position of the second adjusting surface 331 along the first adjusting surface 41 is adjusted, for example, the second adjusting surface 331 moves from the first position to the second position along the first adjusting surface 41, and at this time, the second adjusting surface 331 coincides with the high-level portion of the first adjusting surface 41, which is equivalent to reducing the diameter of the inner envelope surface of the roller set 30.
When the radial gap between the inner envelope surface of the roller set 30 and the wall of the roller needs to be increased, the second adjusting surface 331 moves from the first position to the third position along the first adjusting surface 41 by adjusting the relative position of the second adjusting surface 331 along the first adjusting surface 41, and at this time, the second adjusting surface 331 coincides with the lower portion of the first adjusting surface 41, which corresponds to increasing the diameter of the inner envelope surface of the roller set 30. The radial gap between the envelope surface and the cylinder wall can be adjusted by adjusting the flange 40.
In this embodiment, the inner wall of the flange 40 is provided with a first adjusting surface 41, and the second adjusting surface 331 on the roller set 30 is matched with the first adjusting surface 41 of the flange 40 for use, so that the second adjusting surface moves on the first adjusting surface 41 along the central axis direction of the inner cylinder 10 by adjusting the roller set 30.
In this embodiment, two or more roller groups 30 are disposed between the inner cylinder 10 and the outer cylinder 20, the roller groups 30 are composed of a plurality of rollers 31, the horizontal center planes of the plurality of rollers 31 are located in the same plane, and the plane is perpendicular to the axis of the inner cylinder 10. In this way, the plurality of rollers 31 always roll along the circumferential direction of the walls of the inner cylinder 10 and the outer cylinder 20, preventing the plurality of rollers 31 from being dislocated from the inner cylinder 10 and the outer cylinder 20, and preventing the rollers 31 from rolling. Thereby ensuring that the inner cylinder 10 and the outer cylinder 20 are smooth and free from jamming during relative rotation.
Further, in this embodiment, in order to make the movement of the inner cylinder 10 and the outer cylinder 20 smoother, a plurality of flanges 40 may be disposed between the inner cylinder 10 and the outer cylinder 20, and the roller set 30 on the flanges 40 forms a rolling pair, for example, two, three, or four rollers may be disposed, which may be selected according to actual requirements.
In the above embodiment, the diameter of the rollers 31 and the number of the rollers 31 can be flexibly designed according to the diameters of the inner cylinder 10 and the outer cylinder 20 and the bending moment loads of the inner cylinder 10 and the outer cylinder 20; the larger the diameter and load of the inner cylinder 10 and the outer cylinder 20, the roller set 30 can increase the diameter of the rollers 31 and the number of the rollers 31 to provide good support. In practical applications, the roller 31 is not limited by the limit size and the sequence of sizes, and the contact between the surface of the roller 31 and the outer wall of the inner cylinder 10 or the inner wall of the outer cylinder 20 can reduce the abrasion of the inner cylinder 10 and the outer cylinder 20.
In some embodiments, the roller set 30 includes: a holder 32 provided on an inner wall or an outer wall of the flange 40; the plurality of rollers 31 are circumferentially and uniformly arranged on the retainer 32. The holder 32 fixes the plurality of rollers 31 to form the roller group 30.
In the present embodiment, the roller group 30 is composed of a cage 32 and a plurality of rollers 31 fixed to the cage 32. The cage 32 has two annular plate structures, an installation space for the roller 31 is formed between the two plate structures, and the roller 31 is installed in the installation space of the cage 32. After the rollers 31 are mounted, the horizontal center planes of the plurality of rollers 31 on the holder 32 are always located in the same plane.
In the present embodiment, the roller 31 is located between the inner cylinder 10 and the outer cylinder 20 by the holder 32 provided. Optionally, the retainer 32 is sleeved on the outer wall of the flange 40, and the wheel surface of the roller 31 is abutted with the inner wall of the outer barrel 20; optionally, the retainer 32 is fixedly mounted on the inner wall of the flange 40, and the tread of the roller 31 abuts against the outer wall of the inner cylinder 10.
In the above embodiment, in order to ensure that the roller 31 can be stably mounted on the retainer 32, the retainer 32 is formed as an integral structure, and a through hole is provided on a side surface of the retainer 32, so as to facilitate adjustment of the roller 31, thereby adjusting a radial gap between an envelope surface and a cylinder wall of the roller set 30.
In some embodiments, the cage 32 is circumferentially provided with a plurality of positioning holes 321, and the roller set 30 further includes: the roller support column 33 is arranged in the positioning hole 321 of the retainer 32 and can radially move in the positioning hole 321; the roller 31 is movably connected to the roller support 33. Wherein the positioning hole 321 ensures the accuracy of the movement of the roller support 33.
In this embodiment, the retainer 32 is uniformly provided with a plurality of positioning holes 321 in the circumferential direction, and the roller support 33 can be fixed by inserting the roller support 33 into the positioning holes 321. One end of the roller support 33 is brought into contact with the outer wall of the flange 40, and the other end of the roller support 33 is brought into contact with the inner wall of the outer tube 20.
In this embodiment, since the roller 31 is movably connected to the roller support 33, a roller shaft 34 is further disposed on the roller support 33, and the middle of the roller 31 is a through hole, and the roller shaft 34 passes through the through hole, so that the roller 31 can freely rotate around the roller shaft 34.
Further, in the above embodiment, when the roller 31 abuts against the outer wall of the inner cylinder 10, the roller support 33 is adjusted to move radially in the positioning hole 321, so as to increase or decrease the diameter of the envelope surface of the roller group 30, and the radial gap between the roller 31 and the cylinder wall is adjusted, so that the roller 31 can fully contact with the outer wall of the inner cylinder 10, and the contact stiffness is improved.
In some embodiments, the flange 40 is disposed on the inner barrel 10, the outer wall of the flange 40 is provided with a first adjustment surface 41, and the cage 32 is disposed on the outer wall of the flange 40; the flange 40 is provided on the outer tube 20, a first adjustment surface 41 is provided on an inner wall of the flange 40, and the retainer 32 is provided on an inner wall of the flange 40.
In the present embodiment, the flange 40 is provided to the inner cylinder 10 and/or the outer cylinder 20; the wheel surfaces of the plurality of rollers 31 are in contact with the inner wall of the outer cylinder 20, at this time, the flange 40 is provided on the inner cylinder 10, and the retainer 32 in the roller group 30 is provided on the outer wall of the flange 40; the roller surfaces of the plurality of rollers 31 are in contact with the outer wall of the inner tube 10, and at this time, the flange 40 is provided on the outer tube 20, and the holder 32 in the roller group 30 is provided on the inner wall of the flange 40. By using the retainer 32, the supporting strength of the linear bearing can be further improved, thereby increasing the reliability and the service life of the linear bearing. The flange 40 also ensures the stability of the connection of the cage 32 to the roller support 33 and the roller 31.
Further, to facilitate adjustment of the envelope surface diameter of the roller set 30. In some embodiments, as shown in connection with fig. 5, the side of the roller post 33 of the roller assembly 30 facing away from the roller 31 is provided with a second adjustment surface 331. The second adjustment surface 331 on the roller post 33 mates with the first adjustment surface 41 of the flange 40. The contact stress between the roller 31 and the outer wall of the inner cylinder 10 or the inner wall of the outer cylinder 20 can be directly regulated.
In some embodiments, the first adjustment surface 41 side of the flange 40 is provided with a limit shoulder 42, and the roller post 33 is provided with a limit platform 332 on the second adjustment surface 331 side; the limiting platform 332 can abut against the limiting shaft shoulder 42 to limit the roller support 33 to rotate in the positioning hole 321, so as to prevent the plurality of rollers 31 from being misplaced with the inner cylinder 10 and the outer cylinder 20.
In this embodiment, as shown in fig. 4, a first adjusting surface 41 is provided on the inner wall of the flange 40, a limiting shoulder 42 is provided on one side of the first adjusting surface 41 of the flange 40, and the limiting shoulder 42 is located below the inclined surface low position portion of the first adjusting surface 41; a limiting platform 332 is disposed on one side of the second adjusting surface 331 of the roller pillar 33, and the limiting platform 332 is located below the inclined plane high position portion of the second adjusting surface 331. The stop platform 332 can cooperate with a stop shoulder 42 on the flange 40 to further define the roller post 33.
Alternatively, when the roller post 33 is provided with the second adjustment surface 331. At this time, the limiting platform 332 is disposed on the roller pillar 33, and the limiting platform 332 can be matched with the limiting shoulder 42 on the flange 40, for example, the positioning hole 321 is a circular hole, so that the roller pillar 33 can be prevented from rotating in the circular hole, the horizontal center plane of the roller 31 is always perpendicular to the axis of the inner cylinder 10, and the roller 31 can always roll along the outer wall of the inner cylinder 10 or the inner wall of the outer cylinder 20.
In this embodiment, when the first adjusting surface 41 is disposed on the outer wall of the flange 40, the design manner is the same as that of the first adjusting surface 41 disposed on the inner wall of the flange 40, and will not be described herein.
In some embodiments, as shown in connection with fig. 6, when the roller 31 abuts against the inner wall of the outer cylinder 20, the radius of the roller 31 is smaller than the radius of the inner wall of the outer cylinder 20. When the roller 31 rolls along the inner wall of the outer cylinder 20, in order to ensure that the roller surface of the roller 31 is tangent to the inner wall of the outer cylinder 20, the radius of the roller surface of the roller 31 is smaller than that of the inner wall of the outer cylinder 20. The rolling friction is formed between the roller 31 and the cylinder wall, and the abrasion of the surface of the cylinder wall is reduced.
To ensure good bending load bearing capacity of the linear bearing, in some embodiments, when two flanges 40 are provided, a set distance is provided between the two flanges 40 in the axial direction.
In the present embodiment, the flange 40 is provided with the roller group 30, and when an external force perpendicular to the axis is applied to the end of the inner cylinder 10 or the outer cylinder 20, the rolling bearing receives a large bending moment. The radial support forces of the two roller sets 30 during operation create a moment of couple to resist the overturning moment of the radial load at the end of the inner barrel 10 or outer barrel 20. The longer the set distance between the two roller sets 30, the greater the carrying capacity thereof.
In this embodiment, the corresponding roller set 30 and flange 40 are assembled. Wherein, the first assembly is arranged at the top of the outer cylinder 20, the second assembly is arranged at the bottom of the outer cylinder 20, and the two assemblies are used in pairs to jointly support the inner cylinder 10 to smoothly rotate in the outer cylinder 20.
Alternatively, as shown in fig. 7, the first assembly and the second assembly are fixedly disposed at two ends of the inner cylinder 10, and the rollers of the roller set 30 are abutted against the inner wall of the outer cylinder 20.
In this embodiment, a plurality of flanges 40 may be provided to increase the support strength, and the radial support force of the two flanges 40 furthest apart in the axial direction may form a moment of couple to resist the load bending moment received.
The disclosed embodiments provide a rotating device comprising a rolling bearing as in the previous embodiments. The rolling bearing is connected with the two drums, and after the rolling bearing is installed, the flange 40 and the roller set 30 are arranged between the two sleeves, and the two drums can rotate mutually.
In this embodiment, in order to ensure the supporting rigidity and the movement precision of the two drums, when the gap between the adjacent drums needs to be adjusted, the roller group 30 is pressed by the screw, and a certain pretightening force is applied, so that the radial gap between the roller 31 and the drum is compressed to be a negative value; first, the second adjusting surface 331 moves along the axial direction, and then the first adjusting surface 41 pushes the roller 31 against the wall of the barrel in the radial direction, so that the roller 31 and the wall of the barrel form an interference fit, thereby improving the bearing capacity and the impact resistance, and meanwhile, the roller can still rotate smoothly.
In the above embodiment, the rolling bearing of the structure is adopted in the rotating device, the diameter of the rotating drum is 500mm, and the bending moment bearing capacity is 4000Nm.
In the above embodiment, the process of adjusting the interference is performed after the structure is assembled, so that the difficulty in assembling and disassembling is avoided, and only the adjusting screw is needed to be loosened.
In summary, through the above-mentioned structure, through adjusting the envelope surface diameter size of the roller group, can adjust the radial clearance between envelope surface and the section of thick bamboo wall, if rotary device's rotary drum process size has the error, can carry out certain compensation to it, make gyro wheel 31 and section of thick bamboo wall even contact, form effective support, and then one of them rotary drum of rotary device still can keep higher supporting rigidity under rotatory operating mode to can smooth and easy rotation not jamming not rock.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (9)

1. A rolling bearing, characterized by comprising:
an inner cylinder;
the outer cylinder is sleeved on the inner cylinder;
two or more flanges arranged on the inner cylinder and/or the outer cylinder, wherein a first adjusting surface is arranged on the inner wall or the outer wall of each flange; when two flanges are arranged, a set distance is arranged between the two flanges in the axial direction, and the longer the set distance is, the larger the bearing capacity is;
the roller group is arranged on the inner wall or the outer wall of the flange and is provided with a second adjusting surface, and the second adjusting surface is abutted with the first adjusting surface;
the second adjusting surface moves relative to the first adjusting surface along the central axis direction of the inner cylinder, and the diameter of the envelope surface of the roller group is increased or reduced so as to adjust the gap between the envelope surface of the roller group and the inner cylinder or the outer cylinder;
the roller group comprises a plurality of rollers, the horizontal central planes of the rollers are positioned in the same plane, and the plane is perpendicular to the axis of the inner cylinder; when the outer wall of the flange is provided with a first adjusting surface, the wheel surfaces of a plurality of rollers in the roller group are abutted with the inner wall of the outer cylinder and roll along the circumferential direction of the inner wall; when the inner wall of the flange is provided with a first adjusting surface, the wheel surfaces of a plurality of rollers in the roller group are abutted with the outer wall of the inner cylinder and roll along the circumferential direction of the outer wall; the first adjusting surface and the second adjusting surface are inclined structures provided with a low position part and a high position part.
2. The rolling bearing of claim 1 wherein the roller set comprises:
the retainer is arranged on the inner wall or the outer wall of the flange;
the rollers are circumferentially distributed on the retainer.
3. The rolling bearing of claim 2 wherein the cage is circumferentially provided with a plurality of locating holes, the roller set further comprising:
the roller support is arranged in the positioning hole of the retainer and can radially move in the positioning hole;
the roller is movably connected to the roller support.
4. A rolling bearing according to claim 3, wherein the flange is provided to the inner cylinder, the outer wall of the flange being provided with a first adjustment surface, the cage being provided to the outer wall of the flange; the flange is arranged on the outer cylinder, a first adjusting surface is arranged on the inner wall of the flange, and the retainer is arranged on the inner wall of the flange.
5. The rolling bearing of claim 4 wherein a side of the roller strut in the roller set facing away from the roller is provided with a second adjustment surface.
6. The rolling bearing of claim 5 wherein a limit shoulder is provided on a side of the first adjustment surface of the flange and a limit platform is provided on a side of the second adjustment surface of the roller support; the limiting platform can be abutted with the limiting shaft shoulder so as to limit the roller support to rotate in the positioning hole.
7. The rolling bearing of claim 1 wherein the roller has a tread radius that is less than the inner wall radius of the outer barrel when the roller is in contact with the inner wall of the outer barrel.
8. Rolling bearing according to claim 1, characterized in that, when a plurality of flanges are provided, there is a set distance between two of said flanges which are furthest apart in the axial direction.
9. A rotating device comprising a rolling bearing according to any one of claims 1 to 8.
CN202210041926.XA 2022-01-14 2022-01-14 Rolling bearing and rotating device Active CN114427566B (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3839624A1 (en) * 1988-11-24 1990-05-31 Schaeffler Waelzlager Kg Method for producing a ring of adjustable diameter and ring produced by this method
JPH0712121A (en) * 1993-06-28 1995-01-17 Koyo Seiko Co Ltd Cylindrical roller bearing device
CN101922507A (en) * 2010-09-21 2010-12-22 上海机床厂有限公司 Rolling bearing device capable of eliminating play
CN105202031A (en) * 2014-06-24 2015-12-30 Skf公司 Bearing Cage For A Rolling-Element Bearing, In Particular For A Tapered Roller Bearing
CN105570292A (en) * 2016-03-14 2016-05-11 江苏理工学院 Active and passive integrated protective device capable of eliminating and recovering radial and axial clearances of outer ring of bearing
CN109563881A (en) * 2016-08-05 2019-04-02 罗伯特·博世有限公司 Compensation sleeve, the bearing arrangement with compensation sleeve and the method for assembling compensation sleeve for bearing arrangement
CN109595258A (en) * 2018-10-30 2019-04-09 南安市瑞方机械科技有限公司 A kind of large size bearing radial internal clearance automatic adjusting mechanism
CN111706584A (en) * 2020-05-09 2020-09-25 浙江捷昌线性驱动科技股份有限公司 Lifting upright post gap piece mounting assembly and lifting upright post
CN112628282A (en) * 2020-11-17 2021-04-09 宁波银球小型轴承有限公司 Bearing with high wear resistance
CN213117143U (en) * 2020-09-22 2021-05-04 宁波市镇海英格尔轴承有限公司 Cylindrical roller bearing

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3839624A1 (en) * 1988-11-24 1990-05-31 Schaeffler Waelzlager Kg Method for producing a ring of adjustable diameter and ring produced by this method
JPH0712121A (en) * 1993-06-28 1995-01-17 Koyo Seiko Co Ltd Cylindrical roller bearing device
CN101922507A (en) * 2010-09-21 2010-12-22 上海机床厂有限公司 Rolling bearing device capable of eliminating play
CN105202031A (en) * 2014-06-24 2015-12-30 Skf公司 Bearing Cage For A Rolling-Element Bearing, In Particular For A Tapered Roller Bearing
CN105570292A (en) * 2016-03-14 2016-05-11 江苏理工学院 Active and passive integrated protective device capable of eliminating and recovering radial and axial clearances of outer ring of bearing
CN109563881A (en) * 2016-08-05 2019-04-02 罗伯特·博世有限公司 Compensation sleeve, the bearing arrangement with compensation sleeve and the method for assembling compensation sleeve for bearing arrangement
CN109595258A (en) * 2018-10-30 2019-04-09 南安市瑞方机械科技有限公司 A kind of large size bearing radial internal clearance automatic adjusting mechanism
CN111706584A (en) * 2020-05-09 2020-09-25 浙江捷昌线性驱动科技股份有限公司 Lifting upright post gap piece mounting assembly and lifting upright post
CN213117143U (en) * 2020-09-22 2021-05-04 宁波市镇海英格尔轴承有限公司 Cylindrical roller bearing
CN112628282A (en) * 2020-11-17 2021-04-09 宁波银球小型轴承有限公司 Bearing with high wear resistance

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