CN110905924A

CN110905924A - Tapered roller bearing

Info

Publication number: CN110905924A
Application number: CN201911244692.3A
Authority: CN
Inventors: 蔡福强; 贾宪林; 李春蕾
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-03-24

Abstract

An embodiment of the present invention provides a tapered roller bearing, including: a holder; an inner ring; the roller is arranged in the retainer and is positioned on the outer ring surface of the inner ring; a bearing flange member; the bearing flange piece is integrally annular, the bearing flange piece is provided with an oil throwing channel, the oil throwing channel is communicated with a gap between the retainer and the roller and a first end face of the bearing flange piece, and a second end face of the bearing flange piece is attached to the front end face of the inner ring. The tapered roller bearing provided by the embodiment of the invention can throw the lubricating oil positioned on the side surface of the bearing flange piece into the gap between the retainer and the roller through the oil throwing channel arranged on the bearing flange piece by utilizing centrifugal force, so that each component of the bearing is fully lubricated, the durability of the bearing is improved, and the service life of the bearing is prolonged.

Description

Tapered roller bearing

Technical Field

The embodiment of the invention relates to the field of bearings, in particular to a tapered roller bearing.

Background

The tapered roller bearing is mainly applied to scenes needing to bear axial and radial combined loads at the same time, and generally comprises an inner ring, an outer ring, a retainer and rollers. In order to normally rotate the cage, it is necessary to prevent the cage from largely moving in the radial direction or the axial direction, and therefore, a structure for restricting the position of the cage is required, which is called a guide cage.

In the tapered roller bearing working under working conditions of a high-speed railway and the like, the impact force applied to the retainer is generally larger, so that the design that the retainer is guided by the inner ring flange and the roller together is adopted to reduce the deformation of the retainer when the retainer is impacted and prevent the retainer from greatly moving in the radial direction or the axial direction.

Because the inner ring flange and the roller are adopted to guide the retainer together, the clearance between the retainer and the inner ring flange is very small, so that lubricating oil can not sufficiently enter a roller path of the bearing, poor lubrication of the bearing is easily caused, and the service life of the bearing is further shortened.

Therefore, how to sufficiently introduce the lubricating oil into the raceway of the bearing becomes a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

The technical problem solved by the embodiment of the invention is how to make lubricating oil fully enter the raceway of the bearing.

In order to solve the above problem, an embodiment of the present invention provides a tapered roller bearing, including:

a holder;

an inner ring;

the roller is arranged in the retainer and is positioned on the outer ring surface of the inner ring;

a bearing flange member; the bearing flange piece is integrally annular, the bearing flange piece is provided with an oil throwing channel, the oil throwing channel is communicated with a gap between the retainer and the roller and a first end face of the bearing flange piece, and a second end face of the bearing flange piece is attached to the front end face of the inner ring.

Optionally, the number of the oil slinger channels is at least 2, and the oil slinger channels are uniformly distributed along the circumferential direction of the bearing edge blocking piece.

Optionally, the oil slinger channel is an oil slinger groove.

Optionally, on the cross section of the bearing edge blocking piece, the straight lines where the two side edges of the oil throwing groove are located do not pass through the axis of the bearing edge blocking piece.

Optionally, the oil slinging channel is an oil slinging through hole.

Optionally, the bearing side-stop has a density less than a density of the inner race.

Optionally, the material of the bearing flange piece is plastic or aluminum alloy.

Optionally, the bearing flange member is detachably and fixedly arranged on the front end surface of the inner ring.

Optionally, the bearing flange is detachably fixed to the front end surface of the inner ring by using a bolt.

Optionally, the bearing edge-blocking piece and the inner ring are of an integral structure.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages:

the bearing edge blocking piece of the tapered roller bearing provided by the embodiment of the invention is provided with the oil throwing channel which is communicated with the gap between the retainer and the roller and the first end surface of the bearing edge blocking piece, and the oil throwing channel can throw lubricating oil positioned on the first end surface of the bearing edge blocking piece into the gap between the retainer and the roller by utilizing centrifugal force, so that all components of the bearing are fully lubricated. Therefore, the tapered roller bearing provided by the embodiment of the invention can enable lubricating oil to fully enter the raceway, and all components of the bearing can be effectively lubricated, so that the durability of the bearing is improved, and the service life of the bearing is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic partial longitudinal sectional view of a tapered roller bearing;

FIG. 2 is a schematic longitudinal sectional view of a portion of a tapered roller bearing according to an embodiment of the present invention;

FIG. 3 is a schematic longitudinal sectional view of a bearing retainer for a tapered roller bearing according to an embodiment of the present invention;

FIG. 4 is an axial schematic view of a bearing retainer for a tapered roller bearing according to an embodiment of the present invention;

fig. 5 is a schematic longitudinal sectional view of another bearing retainer for a tapered roller bearing according to an embodiment of the present invention.

Legend: 1. a bearing flange member; 11. an oil slinging channel; 2. an inner ring; 3. a holder; 4. a roller; 5. and an outer ring.

Detailed Description

As can be seen from the background art, the structure of the existing tapered roller bearing adopting the inner ring rib and the roller to guide the cage together is inconvenient for the lubricating oil to enter the raceway of the bearing.

A tapered roller bearing will now be described in detail.

Referring to fig. 1, fig. 1 is a schematic longitudinal sectional view of a tapered roller bearing.

The longitudinal section described herein is a section taken along the radial direction of the structure, passing through the axis of the structure.

Since the tapered roller bearing is annular, the tapered roller bearing is necessarily divided into two axially symmetrical portions in a longitudinal section, one of which is shown in fig. 1, and the other, not shown, is symmetrical about the axis of the tapered roller bearing.

As shown in fig. 1, the tapered roller bearing includes: inner ring 2, cage 3, rollers 4 and outer ring 5.

When the tapered roller bearing is used for equipment such as a high-speed railway, the retainer 3 can be subjected to axial and radial impact force, and the received impact force is generally large, so the design that the retaining edge of the inner ring 2 and the roller 4 are adopted to guide the retainer 3 together is adopted, so that the clearance between the retainer 3 and the retaining edge of the inner ring 2 is small, and in the working process of the bearing, the retaining edge of the inner ring 2 can limit the radial position movement of the retainer 3, the deformation of the retainer 3 when the retainer 3 is impacted is reduced, the normal rotation of the retainer 3 is ensured, and the bearing works normally.

However, because the clearance between the retainer 3 and the rib of the inner ring 2 is small, the lubricating oil enters the raceway of the bearing insufficiently, which easily causes poor lubrication of each part of the bearing, thereby reducing the durability of the bearing and shortening the service life of the bearing. Therefore, how to sufficiently introduce the lubricating oil into the raceway of the bearing becomes a technical problem that needs to be solved by those skilled in the art.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2 to fig. 4, fig. 2 is a schematic longitudinal sectional view of a portion of a tapered roller bearing according to an embodiment of the present invention; FIG. 3 is a schematic longitudinal sectional view of a bearing retainer for a tapered roller bearing according to an embodiment of the present invention; fig. 4 is an axial schematic view of a bearing retainer of a tapered roller bearing according to an embodiment of the present invention.

As shown in the drawing, in order to sufficiently introduce the lubricating oil into the raceway of the bearing, the tapered roller bearing according to the embodiment of the present invention includes: a holder 3; an inner ring 2; a roller 4 provided in the cage 3 and located on an outer circumferential surface of the inner ring 2; a bearing flange member 1; the bearing edge-blocking piece 1 is annular in whole, the bearing edge-blocking piece 1 is provided with an oil throwing channel 11, the oil throwing channel 11 is communicated with a gap between the retainer 3 and the roller 4 and a first end face of the bearing edge-blocking piece 11, and a second end face of the bearing edge-blocking piece 1 is attached to a front end face of the inner ring 2.

Since the tapered roller bearing is annular, the tapered roller bearing is necessarily divided into two portions symmetrical about the axis in a longitudinal section, one of which is shown in fig. 2, and the other portion, not shown, is symmetrical about the axis of the tapered roller bearing.

It should be noted that, in the working state of the bearing, the bearing blocking edge member 1 is fixed on the transmission shaft supported by the tapered roller bearing, and the second end face of the bearing blocking edge member 1 is attached to the front end face of the inner ring 2 of the tapered roller bearing. Wherein, the second end surface of the bearing edge-blocking piece 1 is attached to the front end surface of the inner ring 2 of the tapered roller bearing, which means that no gap exists; the bearing edge-blocking member 1 may be fixedly disposed on the front end surface of the inner ring 2 of the tapered roller bearing, or may be held in contact with the front end surface of the inner ring 2 of the tapered roller bearing without being connected to each other.

In the working process of the tapered roller bearing provided by the embodiment of the invention, lubricating oil is generally adhered to the outer side of the bearing edge blocking piece 1, the bearing edge blocking piece 1 integrally rotates along with the tapered roller bearing, and as the bearing edge blocking piece 1 is provided with an oil throwing channel 11 which communicates the gap between the retainer 3 and the roller 4 and the first end surface of the bearing edge blocking piece, the oil throwing channel 11 can throw the lubricating oil on the first end surface of the bearing edge blocking piece 1 into the gap between the retainer 3 and the roller 4 by using centrifugal force, so that all components of the bearing are fully lubricated.

Therefore, the tapered roller bearing provided by the embodiment of the invention can enable lubricating oil to fully enter the raceway, and all components of the bearing can be effectively lubricated, so that the durability of the bearing is improved, and the service life of the bearing is prolonged.

It can be understood that the number of the oil slinger channels 11 formed in the bearing side blocking piece 1 can be set according to requirements. When the number of the oil throwing channels 11 is too small, the amount of lubricating oil entering the raceway of the bearing through the oil throwing channels 11 is small, and the lubricating effect is poor; when the number of the oil slinger channels 11 is too large, the structural strength of the bearing edge-blocking piece 1 is low, the durability is not sufficient, and the machining of the oil slinger channels 11 is not convenient.

Through a large number of practical tests, 10-15 oil throwing channels 11 can be arranged, so that the lubricating oil entering the raceway of the bearing can meet the requirement of fully lubricating the bearing, the structural strength of the bearing edge retaining piece 1 can be well maintained, and the machining is simple and convenient.

Further, when the number of the oil slinger channels 11 is 12, the combined effect of the lubricating effect brought by the oil slinger channels 11, the structural strength of the bearing side retainer 1 and the ease of machining is the best. Therefore, in one embodiment, the number of the oil slinger channels 11 is 12.

When the number of the oil slinger channels 11 is larger than two, the oil slinger channels 11 can be arranged as required in a manner of being distributed in the circumferential direction of the bearing edge-blocking piece 1. However, when the oil slinger channels 11 are not uniformly distributed in the circumferential direction of the bearing side edge part 1, the center of gravity of the bearing side edge part 1 cannot fall on the rotation axis in the working state, and eccentric rotation occurs, so that one side of the bearing side edge part 1 is pulled by centrifugal force, and the structural strength of the bearing side edge part 1 is affected.

Therefore, in one embodiment, when the number of the oil slinger channels 11 is at least 2, each oil slinger channel 11 can be uniformly distributed along the circumferential direction of the bearing side stop. Like this, under operating condition, the focus of bearing flange spare 1 can fall on its pivoted axis, eccentric rotation can not appear, bearing flange spare 1 all directions can the even atress, and difficult emergence structural deformation to the life of extension bearing flange spare 1.

The specific implementation of the oil slinging channel 11 can be various. In one embodiment, the oil slinger channel 11 is an oil slinger tank. In fig. 2-4, the oil slinger channel 11 is an oil slinger groove. In another specific embodiment, the oil slinging channel 11 is an oil slinging through hole. Referring to fig. 5, fig. 5 is a schematic longitudinal sectional view of another bearing retaining edge member of the tapered roller bearing provided in the embodiment of the present invention in fig. 5. In fig. 2-4, the oil slinging channel 11 is an oil slinging through hole.

It is understood that when the oil slinger channel 11 is an oil slinger, the shape and direction of the oil slinger channel can be set as required.

Referring to fig. 4, in a specific embodiment, when two sides of the oil slinger along the axial direction of the bearing edge piece 1 are planes, on the cross section of the bearing edge piece, the projection of the oil slinger may be a sector ring shape, the upper and lower bottom edges of the sector ring shape are two arcs, and two sides are two straight lines.

When fan annular both sides limit place straight line all passes through during the axle center of bearing flange spare 1, promptly fan annular both sides limit place straight line with when the diameter of bearing flange spare 1 is coincided, though enter into get rid of the lubricating oil of oil groove can be got rid of extremely through centrifugal force very fast in the raceway of bearing, but be located the lubricating oil of bearing flange spare 1 side can both get into very fast not the oil groove is got rid of.

This is because, in the operating state, the bearing edge piece 1 fixed to the drive shaft and the drive shaft keep driving at the same speed. Because lubricating oil has the stickness, consequently be located the lubricating oil of bearing flange spare 1 side is in the drive of bearing flange spare 1 side also can rotate, but the power that the stickness brought is usually not enough to drive lubricating oil with bearing flange spare 1 rotates with high speed, therefore lubricating oil with bearing flange spare 1 can take place along circumferential relative rotation. When lubricating oil moves to get rid of the opening of oil groove on one side of external world, because fan annular both sides limit place sharp with the diameter coincidence of bearing flange spare 1, so lubricating oil for bearing flange spare 1's direction of rotation with fan annular both sides limit place sharp perpendicular, so lubricating oil does not get into get rid of the tendency of oil groove, also hardly makes lubricating oil fully get into get rid of the oil groove.

Therefore, in order to facilitate the lubricating oil to fully enter the oil throwing groove, in a specific embodiment, on the cross section of the bearing edge blocking piece 1, the straight lines of the two side edges of the oil throwing groove do not pass through the axis of the bearing edge blocking piece 1.

Because the straight line in the both sides limit place of getting rid of the oil groove does not all pass through bearing flange spare 1's axle center moves extremely when lubricating oil get rid of the opening that is located external one side of oil groove, lubricating oil for bearing flange spare 1's direction of rotation with fan annular both sides limit place straight line is not totally perpendicular, and the edge can be decomposed to the power that lubricating oil receives get rid of oil groove extending direction's component and edge the component of bearing flange spare 1's direction of rotation, lubricating oil exist and get into get rid of the tendency of oil groove, also get into easily get rid of the oil groove, and then fully enter into to the raceway of bearing, each structure of fully lubricated bearing.

It is understood that when the oil slinger channel 11 is an oil slinger through hole, the shape and direction of the oil slinger through hole can be set as required. In one embodiment, the oil slinging through hole is a straight hole to facilitate the entry of lubricating oil. Of course, in other embodiments, the oil slinging through hole may be a bent hole.

In the tapered roller bearing, the material of the bearing retainer 1 may be selected as needed. Because the impact force applied to the bearing is mainly borne by the inner ring 2, the outer ring 5, the rollers 4 and the retainer 3 in the working process of the bearing, the impact force applied to the bearing blocking edge piece 1 in a working state is not necessarily very large, and therefore the bearing blocking edge piece 1 can be made of a material with lower density than the inner ring 2 so as to reduce the overall weight of the tapered roller bearing.

Therefore, in one embodiment, the density of the bearing side-stop 1 is less than the density of the inner race 2. By manufacturing the bearing retainer 1 from a material having a density lower than that of the inner ring 2, the weight of the tapered roller bearing can be effectively reduced.

Specifically, the material of the bearing edger 1 may be selected as needed. Therefore, in one embodiment, the material of the bearing side edge part 1 is plastic or aluminum alloy. By manufacturing the bearing edge-blocking piece 1 from a material having a relatively low density, such as plastic or aluminum alloy, the weight of the bearing edge-blocking piece 1 can be reduced, and the cost of the bearing edge-blocking piece 1 can also be reduced.

The second end face of the bearing edge blocking piece 1 is attached to the front end face of the inner ring 2 in various ways. In a specific embodiment, the second end surface of the bearing edge-blocking piece 1 is only attached to the front end surface of the inner ring 2 without connection, so that the bearing edge-blocking piece can be conveniently replaced when damaged, and the replacement cost is reduced. Of course, in another embodiment, the second end surface of the bearing edge-blocking piece 1 is fixedly connected with the front end surface of the inner ring 2, so that the connection firmness is ensured. In yet another embodiment, the second end surface of the bearing side edge piece 1 and the front end surface of the inner ring 2 are of a unitary structure.

In the tapered roller bearing, the bearing retainer 1 may not be fixedly connected to the other portion of the tapered roller bearing, and therefore the bearing retainer 1 may be provided separately from the other portion of the tapered roller bearing. However, if the bearing retainer 1 is placed apart from the rest of the tapered roller bearing during transportation of the tapered roller bearing, the bearing retainer 1 is easily deformed when it is struck, and thus is inconvenient for further use.

Therefore, in order to prevent the bearing sidepieces 1 from being deformed during transportation, in one embodiment, the bearing sidepieces 1 are detachably fixedly provided to the front end surface of the inner ring. Specifically, during transportation of the bearing side edge piece 1 and other parts of the tapered roller bearing, the bearing side edge piece 1 is fixed to the front end surface of the inner ring 2. Compared with the condition that the bearing edge-blocking piece 1 is not fixedly connected with the inner ring 2, under the condition that the bearing edge-blocking piece 1 is fixed with the inner ring 2, the bearing edge-blocking piece 1 is less prone to shape deformation when being impacted; in an actual working state, the bearing edge blocking piece 1 can be detached and fixed on a transmission shaft supported by the bearing tapered roller, and can also be fixedly connected with the transmission shaft supported by the tapered roller bearing while being fixedly connected with the inner ring 2.

The bearing edge-blocking piece 1 is detachably and fixedly arranged on the front end surface of the inner ring 2, so that the bearing edge-blocking piece 1 can be more flexibly arranged; the bearing side stop 1 can be fixedly arranged at the front end of the inner ring 2 in the transportation stage, and the structural deformation caused by impact in the transportation stage is reduced.

Specifically, the bearing edge-blocking piece 1 may be detachably and fixedly disposed on the front end surface of the inner ring 2 as needed. In one embodiment, the bearing flange is detachably fixed to the front end surface of the inner ring by bolts. When the bearing edge-blocking piece 1 is fixedly arranged on the front end face of the inner ring 2 by using bolts, the bearing edge-blocking piece 1 and the inner ring 2 can be conveniently fixed, meanwhile, better connection strength is kept, and deformation of the bearing edge-blocking piece 1 in the process of being impacted is reduced.

Although the bearing receives impact force mainly borne by the inner ring 2, the outer ring 5, the rollers 4 and the retainer 3 during the operation of the bearing, the impact force borne by the bearing blocking edge piece 1 in the operation state is not necessarily large, but the situation that the impact force borne by the bearing blocking edge piece 1 in the operation state is relatively large is not excluded.

Therefore, in order to reduce deformation of the bearing edger 1 when a large impact force is applied thereto, the structural strength of the bearing edger 1 can be improved. Therefore, in one embodiment, the bearing side stop 1 is of unitary construction with the inner race 2. Through with bearing flange spare 1 with inner circle 2 sets up to a body structure, can make bearing flange spare 1 with inner circle 2 is connected more tightly, is difficult for taking place structural deformation.

Although the embodiments of the present invention are disclosed above, the embodiments of the present invention are not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present embodiments, and it is intended that the scope of the present embodiments be defined by the appended claims.

Claims

1. A tapered roller bearing, characterized by comprising:

a holder;

an inner ring;

2. A tapered roller bearing according to claim 1, wherein the number of the oil slinger passages is at least 2, and each of the oil slinger passages is evenly distributed in the circumferential direction of the bearing rim piece.

3. The tapered roller bearing of claim 2, wherein the oil slinger passage is an oil slinger groove.

4. A tapered roller bearing according to claim 3, wherein, in the cross section of the bearing rim piece, the straight lines on which both side edges of the oil slinger are located do not pass through the axial center of the bearing rim piece.

5. A tapered roller bearing according to claim 2, wherein the oil slinger passage is an oil slinger through hole.

6. A tapered roller bearing according to any one of claims 1 to 5, wherein the density of the bearing rims is less than the density of the inner ring.

7. A tapered roller bearing according to claim 6, wherein the material of the bearing edger is a plastic or an aluminium alloy.

8. A tapered roller bearing according to any one of claims 1 to 5, wherein the bearing rib member is detachably fixed to a front end face of the inner race.

9. The tapered roller bearing of claim 8, wherein the bearing rib is detachably fixed to a front end surface of the inner ring by a bolt.

10. A tapered roller bearing according to any one of claims 1 to 5, wherein the bearing edger is of integral construction with the inner race.