CN112901650A

CN112901650A - Bearing assembly

Info

Publication number: CN112901650A
Application number: CN202110126146.0A
Authority: CN
Inventors: 蔡福强; 吴丽娟; 李春蕾; 贾宪林
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-06-04

Abstract

An embodiment of the present invention provides a bearing, including: the bearing inner ring comprises an inner side blocking portion, the inner side blocking portion is provided with a grease channel, an oil outlet of the grease channel is formed in a first end face of the inner side blocking portion, the first end face is suitable for being in contact with the rolling body, an oil inlet of the grease channel is formed in a second end face of the inner side blocking portion, the second end face is suitable for being in contact with the middle spacer ring, the number of the bearing inner rings is 2, and each bearing inner ring is coaxially arranged along the axial direction of the bearing; the middle spacer ring is coaxial with the bearing inner rings and arranged between the 2 bearing inner rings, two axial ends of the middle spacer ring are respectively contacted with the second end faces of the inner edge blocking portions, the outer diameter size of the middle spacer ring is smaller than that of the inner edge blocking portions, grease in the space defined by the inner edge blocking portions on two sides of the middle spacer ring and the middle spacer ring can flow into the roller path where the rolling body is located along the grease channel, lubricating grease is supplied to the roller path in time, the possibility of roller path friction and temperature rise is reduced, and the service life of the bearing is prolonged.

Description

Bearing assembly

Technical Field

The embodiment of the invention relates to the technical field of machinery, in particular to a bearing.

Background

The tapered roller bearing is mainly applied to a scene needing to bear axial and radial combined loads at the same time, and comprises a bearing inner ring, a bearing outer ring, a retainer and rollers, wherein the bearing inner ring, the rollers and the retainer form a whole to form a bearing inner ring assembly, namely: the cage confines the rollers between the bearing inner race and the cage. In order to control the axial play of the bearing, taking the solution of double row bearing inner rings as an example, the axial play is usually adjusted by providing a spacer between the two bearing inner rings.

When the bearing runs at a high speed, due to the action of centrifugal force and the design of the conical roller path, grease at the middle spacer ring position can be gradually thrown to the sealing positions at the two axial ends of the bearing, and lubrication is difficult to be provided for the roller path in time, so that roller path friction and temperature rise occur, and the service life of the bearing is influenced.

Therefore, how to reduce the temperature rise inside the bearing becomes a technical problem that needs to be solved urgently by the technical personnel in the field.

Disclosure of Invention

The embodiment of the invention solves the technical problems of reducing the temperature rise in the bearing and prolonging the service life of the bearing.

To solve the above problem, an embodiment of the present invention provides a bearing, including:

the bearing inner ring comprises an inner edge blocking part, the inner edge blocking part is provided with a grease channel, an oil outlet of the grease channel is arranged on a first end face of the inner edge blocking part, the first end face is suitable for being in contact with the rolling body, an oil inlet of the grease channel is arranged on a second end face of the inner edge blocking part, the second end face is suitable for being in contact with the middle spacer ring, the number of the bearing inner rings is 2, and each bearing inner ring is coaxially arranged along the axial direction of the bearing;

and the middle spacer ring is coaxial with the bearing inner rings and is arranged between the 2 bearing inner rings, two axial ends of the middle spacer ring are respectively contacted with the second end surface of the inner edge blocking part, and the outer diameter of the middle spacer ring is smaller than that of the inner edge blocking part.

Optionally, the grease channel comprises an inclined through hole, the through hole gradually departing from the axis of the bearing in the direction from the oil inlet to the oil outlet.

Optionally, the grease channel includes an annular tapered bore, and the size of the oil inlet is larger than the size of the oil outlet.

Optionally, the number of the grease channels is at least 2, and the grease channels are uniformly distributed along the circumferential direction of the inner flange portion.

Optionally, the bearing further comprises:

the oil collector is integrally of an annular structure, the oil collector is fixed to the middle space ring and sleeved on the outer annular surface of the middle space ring, an oil storage cavity is formed in the oil collector, and the oil channel is communicated with the oil storage cavity.

Optionally, the grease collector includes median septum and outer annular baffle, the radially outer tip of median septum with annular baffle fixed connection, outer annular baffle includes first backstop portion and second backstop portion, first backstop portion with second backstop portion respectively to the axial both sides of median septum extend, the radially inner tip of median septum is fixed in the middle compartment circle, the oil storage chamber includes first oil storage chamber and second oil storage chamber, median septum, first backstop portion and middle compartment enclose into first oil storage chamber, median septum, second backstop portion and middle compartment enclose into the second oil storage chamber.

Optionally, the grease collector further includes an inner annular baffle fixed to an outer annular surface of the middle partition ring and fixedly connected to a radial inner end of the middle partition plate, and the inner annular baffle includes a first fixing portion and a second fixing portion, and the first fixing portion and the second fixing portion respectively extend to two axial sides of the middle partition plate.

Optionally, the first blocking portion and the first fixing portion extend in the same direction, the second blocking portion and the second fixing portion extend in the same direction, the middle partition plate, the first blocking portion and the first fixing portion enclose the first oil storage chamber, and the middle partition plate, the second blocking portion and the second fixing portion enclose the second oil storage chamber.

Optionally, the first oil reservoir chamber and the second oil reservoir chamber are identical in shape.

Optionally, the outer annular baffle has a width equal to or greater than a width of the intermediate spacer.

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

according to the bearing provided by the embodiment of the invention, the inner edge retaining part of the bearing inner ring is provided with the grease channel, the oil inlet of the grease channel is arranged on the second end surface of the inner edge retaining part, the oil outlet of the grease channel is arranged on the first end surface of the inner edge retaining part, the inner end surface of the rolling body is in contact with the first end surface of the inner edge retaining part, the intermediate ring is in contact with the second end surface of the inner edge retaining part, and the grease in the space enclosed by the inner edge retaining part and the intermediate ring on two sides of the intermediate ring can flow into the roller path where the rolling body is located along the grease channel under the action of centrifugal force, so that the grease is supplied to the roller path in time, the possibility of roller path friction and temperature rise is reduced, and the service life of the bearing is prolonged.

In the alternative, the bearing further comprises a grease collector which is of an annular structure integrally, the grease collector is fixed to the middle space ring and sleeved on the outer annular surface of the middle space ring, an oil storage cavity is formed in the grease collector, and the grease channel is communicated with the oil storage cavity. Through set up the grease collector at well mesophragma circle outer annular surface, can avoid the grease of well mesophragma circle outer annular surface department to get rid of to radial bearing outer lane, provide more grease for the part clearance to the route of advancing to lubricating grease has been controlled, makes lubricating grease follow the position that the grease passageway got into need lubricate more smoothly, improves lubricated effect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, 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 structural diagram of a bearing provided by an embodiment of the present invention;

FIG. 2 is a schematic structural view of a bearing provided in accordance with another embodiment of the present invention;

FIG. 3 is an enlarged partial view of area A of FIG. 2;

fig. 4 is a partial schematic view of a grease collecting device of a bearing according to an embodiment of the present invention.

Wherein: 10-bearing inner race; 20-a middle space ring; 30-inner flange part; 300-a grease channel; 40-a grease collector; 410-a first reservoir chamber; 420-a second reservoir chamber; 400-an outer annular baffle; 401 — a first stop; 402-a second stop; 50-a cage; 60-bearing outer race; 70-rolling bodies; 800-inner annular baffle; 801-a first fixed part; 802-a second stationary part; 900-middle partition board.

Detailed Description

As known from the background art, the bearing is easy to generate the phenomena of raceway friction and temperature rise, and the service life of the bearing is influenced.

In order to reduce the internal temperature rise of the bearing, the embodiment of the invention provides the bearing, the inner edge retaining part of the inner ring of the bearing is provided with the grease channel, the oil inlet of the grease channel is arranged on the second end surface of the inner edge retaining part, the oil outlet of the grease channel is arranged on the first end surface of the inner edge retaining part, the inner end surface of the rolling body is in contact with the first end surface of the inner edge retaining part, the middle spacer ring is in contact with the second end surface of the inner edge retaining part, and the outer diameter of the middle spacer ring is smaller than that of the inner edge retaining part, so that grease in a space defined by the inner edge retaining part and the middle spacer ring on two sides of the middle spacer ring can flow into a roller path where the rolling body is located along the grease channel, lubricating grease is supplied to the roller path in time, the possibility of friction and.

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.

It should be noted that the indication of the direction or the positional relationship referred to in the present specification is based on the direction or the positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and it is not intended to indicate or imply that the indicated device must have a specific direction, be configured in a specific direction, and thus, should not be construed as limiting the present invention.

It should be noted that the bearing type is not limited in the embodiments of the present invention, and for convenience of description, the tapered roller bearing will be described below as an example, but in other embodiments, other types of bearings such as a cylindrical roller bearing may be used.

Referring to fig. 1, fig. 1 is a partial schematic view of a bearing according to an embodiment of the present invention. It will be appreciated by those skilled in the art that only a portion of a longitudinal cross-sectional view of the bearing is illustrated in figure 1.

As shown in fig. 1, a bearing provided in an embodiment of the present invention includes:

the bearing inner ring 10 comprises an inner side wall portion 30, the inner side wall portion 30 is provided with a grease channel 300, an oil outlet of the grease channel 300 is formed in a first end face of the inner side wall portion 30, the first end face is suitable for being in contact with the rolling body 70, an oil inlet of the grease channel 300 is formed in a second end face of the inner side wall portion 30, the second end face is suitable for being in contact with the middle partition ring 20, the number of the bearing inner rings 10 is 2, and each bearing inner ring 10 is coaxially arranged along the axial direction of the bearing;

and the middle spacer ring 20 is coaxial with the bearing inner rings 10 and is arranged between the 2 bearing inner rings 10, two axial ends of the middle spacer ring 20 are respectively contacted with the second end surface of the inner edge blocking part 30, and the outer diameter of the middle spacer ring 20 is smaller than that of the inner edge blocking part 30.

Note that, the inner flange portion 30 refers to a portion of the bearing inner race 10 on the side close to the middle spacer 20 for stopping the rolling element 70, and in this embodiment, please refer to an oval dashed frame area in fig. 1.

The shape of the grease channel 300 is not limited, as long as it can be ensured that grease in the space surrounded by the inner flange parts 30 at the two sides of the middle space ring 20 and the middle space ring 20 can flow in along the oil inlet and flow out at the oil outlet of the grease channel 300.

By forming the grease passage 300 in the inner rim portion 30 of the bearing inner race 10, wherein an oil inlet of the grease passage 300 is formed in the second end surface of the inner rim portion 30, an oil outlet of the grease passage 300 is formed in the first end surface of the inner rim portion 30, and since the inner end surface (the end of the rolling element away from the axial end surface of the bearing) of the rolling element 70 supported by the retainer 50 is in contact with the first end surface of the inner rim portion 30 and the intermediate collar 20 is in contact with the second end surface of the inner rim portion 30, the outer diameter of the intermediate collar 20 is smaller than the outer diameter of the inner rim portion 30, although the grease at the intermediate collar 20 other than the outer ring surface of the inner rim portion 30 is thrown to the axial end surfaces at both sides of the bearing under the action of centrifugal force, the grease in the space surrounded by the inner rim portion 30 and the intermediate collar 20 at both sides of the intermediate collar 20 can flow into the raceway where the rolling element, lubricating grease is supplied to the raceway in time, the possibility of friction and temperature rise of the raceway is reduced, and the service life of the bearing is prolonged.

With continued reference to fig. 1, in one particular embodiment, the grease channel 300 includes an inclined through hole that is progressively further from the axis of the bearing in a direction from the oil inlet to the oil outlet. Taking the tapered roller bearing as an example, the inclination direction of the through hole is consistent with the direction of the sloping surface of the raceway of the bearing inner ring 10, so that lubricating grease can enter the raceway from the spacing ring 20 along the through hole more favorably. Of course, in other embodiments, the grease channel 300 may also include a through bore parallel to the axis of the bearing.

The number of the grease passages 300 is not limited, and of course, as the number of the grease passages 300 increases, the efficiency of the grease entering the raceway along the grease passages 300 increases, so that in order to further ensure that the grease enters the raceway in time and the uniformity of the grease distribution is ensured, in a specific embodiment, the number of the grease passages 300 is at least 2, and the grease passages 300 are uniformly distributed along the circumferential direction of the inner flange portion 30.

Certainly, the number of the lubricating grease formed on the bearing inner ring 10 may be 1, and the axis of the lubricating grease may coincide with the axis of the bearing inner ring 10, in a specific embodiment, the grease channel 300 includes an annular tapered hole, the taper direction of the annular tapered hole is the same as the direction of the slope surface of the raceway of the bearing inner ring 10, taking a tapered roller bearing as an example, the annular tapered hole is more favorable for the lubricating grease to enter the raceway from the middle spacer ring 20 along the through hole. Further, the size opening of the oil inlet can be larger than the size opening of the oil outlet, and the annular taper hole with the larger size of the oil inlet is also more beneficial to lubricating grease to enter the roller path from the middle spacer ring 20 along the through hole. Of course, in other embodiments, the grease may also be a cylindrical through hole, the axis of the grease coinciding with the axis of the bearing.

Of course, in order to increase the supply amount of the lubricating grease, referring to fig. 2, in a specific embodiment, the bearing may further include: the oil collector 40 is integrally of an annular structure, the oil collector 40 is fixed to the middle space ring 20 and sleeved on the outer annular surface of the middle space ring 20, the oil collector 40 is provided with an oil storage cavity, and the oil passage 300 is communicated with the oil storage cavity.

It should be noted that the grease trap 40 and the spacer 20 may be two relatively independent components or may be integrally formed.

When the bearing is assembled, a certain amount of lubricating grease can be added into the grease collecting device in advance, and during the subsequent operation of the bearing, the grease collecting device is used as an oil storage part and respectively conveys the lubricating grease to the bearing inner rings 10 on two sides.

Specifically, the outer annular baffle 400 may have a width that is greater than or equal to the width of the center cage 20 to prevent grease at the outer annular surface of the center cage 20 from being thrown against the radial bearing outer race 60 during bearing operation. Of course, in other embodiments, the outer annular rib may have a width less than that of the center spacer 20.

Through set up grease collector 40 in well spacer ring 20 outer annular surface, can avoid the grease of well spacer ring 20 outer annular surface department to get rid of radial bearing outer lane 60 as far as possible, provide more grease for the part clearance to the advancing path to lubricating grease has been controlled, makes lubricating grease follow grease passageway 300 more smoothly and gets into the position that needs the lubrication, improves lubricated effect.

Reference is made to fig. 3 and 4 in conjunction with fig. 2, wherein fig. 3 is a partial enlarged view of the area a of fig. 2, and fig. 4 only shows a part of a sectional view of the grease collecting device. In order to facilitate the bearing installation, the middle spacer 20 and the grease trap 40 are designed as 2 independent components, in a specific embodiment, the grease trap 40 includes a middle partition 900 and an outer annular baffle 400, a radial outer end of the middle partition 900 is fixedly connected with the annular baffle, the outer annular baffle 400 includes a first stopper 401 and a second stopper 402, the first stopper 401 and the second stopper 402 respectively extend to two axial sides of the middle partition 900, a radial inner end of the middle partition 900 is fixed to the middle spacer 20, the oil storage chamber includes a first oil storage chamber 410 and a second oil storage chamber 420, the middle partition 900, the first stopper 401 and the middle spacer 20 enclose the first oil storage chamber 410, and the middle partition 900, the second stopper 402 and the middle spacer 20 enclose the second oil storage chamber 420. The oil storage cavity is divided into the first oil storage cavity 410 and the second oil storage cavity 420 by the middle partition board 900, so that lubricating oil can be simultaneously provided for the raceways of the bearing inner rings 10 on two sides, the lubricating efficiency of the bearing is improved, the temperature rise of the bearing is reduced, and the service life of the bearing is prolonged.

With continued reference to fig. 4, in order to improve the fixing stability between the grease trap 40 and the middle partition ring 20, in a specific embodiment, the grease trap 40 further includes an inner annular baffle 800 fixed to the outer circumferential surface of the middle partition ring 20 and fixedly connected to the radial inner end of the middle partition plate 900, and the inner annular baffle 800 includes a first fixing portion 801 and a second fixing portion 802, and the first fixing portion 801 and the second fixing portion 802 extend to both axial sides of the middle partition plate 900 respectively. The first fixing portion 801 and the second fixing portion 802 allow the contact area of the grease trap 40 and the space ring 20 to be increased, thereby enabling the grease trap 40 to be fixed more firmly.

Specifically, as shown in fig. 4, when the grease trap 40 includes the inner annular baffle 800, the extending directions of the first blocking portion 401 and the first fixing portion 801 are the same, the extending directions of the second blocking portion 402 and the second fixing portion 802 are the same, the middle partition plate 900, the first blocking portion 401 and the first fixing portion 801 enclose the first oil storage chamber 410, and the middle partition plate 900, the second blocking portion 402 and the second fixing portion 802 enclose the second oil storage chamber 420.

To facilitate processing of grease trap 40, grease trap 40 is designed to be axisymmetric, and in one embodiment, first reservoir chamber 410 and second reservoir chamber 420 are identical in shape, as shown in fig. 3 and 4. Of course, in other embodiments, the shapes of the first oil storage chamber 410 and the second oil storage chamber 420 are not limited, as long as the first oil storage chamber 410 and the second oil storage chamber 420 are respectively communicated with the grease passages 300 of the 2 bearing inner rings 10, and the grease can enter the raceway.

Although the embodiments of the present invention have been disclosed, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A bearing, comprising:

2. The bearing of claim 1, wherein the grease channel includes an inclined through bore that is progressively further from an axis of the bearing in a direction along the oil inlet to the oil outlet.

3. The bearing of claim 1, wherein the grease passage includes an annular tapered bore, and wherein the oil inlet is larger in size than the oil outlet.

4. The bearing of claim 1, wherein the number of grease channels is at least 2, each of the grease channels being evenly distributed along a circumferential direction of the inner lip portion.

5. The bearing of any one of claims 1-4, further comprising:

6. The bearing of claim 5, wherein the grease trap comprises a middle partition plate and an outer annular baffle plate, a radially outer end portion of the middle partition plate is fixedly connected with the annular baffle plate, the outer annular baffle plate comprises a first stopping portion and a second stopping portion, the first stopping portion and the second stopping portion respectively extend towards two axial sides of the middle partition plate, a radially inner end portion of the middle partition plate is fixed to the middle partition ring, the oil storage chamber comprises a first oil storage chamber and a second oil storage chamber, the middle partition plate, the first stopping portion and the middle partition ring enclose the first oil storage chamber, and the middle partition plate, the second stopping portion and the middle partition ring enclose the second oil storage chamber.

7. The bearing of claim 6, wherein the grease trap further comprises an inner annular baffle fixed to an outer circumferential surface of the middle spacer and fixedly connected to a radially inner end portion of the middle spacer, the inner annular baffle including a first fixing portion and a second fixing portion, the first fixing portion and the second fixing portion extending toward both axial sides of the middle spacer, respectively.

8. The bearing of claim 7, wherein the first stop portion and the first fixing portion extend in the same direction, the second stop portion and the second fixing portion extend in the same direction, the middle partition, the first stop portion and the first fixing portion define the first oil storage chamber, and the middle partition, the second stop portion and the second fixing portion define the second oil storage chamber.

9. The bearing of claim 6, wherein the first oil reservoir and the second oil reservoir are identically shaped.

10. The bearing of claim 6 wherein said outer annular barrier has a width equal to or greater than a width of said center spacer.