CN114483771B

CN114483771B - Single-rod bearing for high-speed rotation

Info

Publication number: CN114483771B
Application number: CN202210134478.8A
Authority: CN
Inventors: 陈亮; 刘涛; 朱建国; 张海见
Original assignee: Okada Seiki Danyang Co ltd
Current assignee: Okada Intelligent Jiangsu Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-07-19
Anticipated expiration: 2042-02-14
Also published as: CN114483771A

Abstract

The invention relates to the technical field of bearing lubrication, in particular to a single-rod bearing for high-speed rotation, which comprises: the bearing is sleeved on a rolling step shaft of the bearing rod, a plurality of roller pins are uniformly arranged in the annular gap along the circumferential direction, and an oil collecting cavity is formed by two adjacent roller pins and the inner hole wall; the bearing gasket is sleeved on the fixed step shaft, the rolling step shaft is provided with a limiting flange which is matched with the bearing gasket and used for limiting the bearing sleeve to move along the axial direction, oil inlet grooves which are obliquely arranged along the radial direction are formed in the end faces of the two sides of the bearing sleeve, a first oil hole and the oil inlet grooves in the bearing rod are communicated with the annular gap, and the first oil hole is communicated with the second oil hole. When the bearing rotates at a high speed, the lubricating oil can quickly enter the annular gap through the pressure difference generated by the rotation of the oil inlet groove and is quickly discharged through the first oil hole and the second oil hole, so that the heat generated by the bearing is timely taken away while the roller pin is lubricated, the over-temperature risk of the bearing is avoided, and the service life of the bearing is prolonged.

Description

Single-rod bearing for high-speed rotation

Technical Field

The invention relates to the technical field of bearing lubrication, in particular to a single-rod bearing for high-speed rotation.

Background

The bearing is commonly used as a guide roller, a valve rod roller, a cam roller for realizing sliding, a pressure roller and the like, and is mainly suitable for various machines, such as automatic machines, special machines, cam working devices, various carrying systems, conveyors and tool changing devices of machining centers.

The existing bearing lubrication can not automatically and timely supplement lubricant for the bearing, manual lubrication is required to be performed regularly, time and labor are wasted, the lubrication effect of the bearing is limited by the rotating speed, when the rotating speed of a rotor is low, the centrifugal force is small, the bearing lubrication can be smoothly sprayed into a bearing raceway after axial oil outlet, but when the rotating speed of the rotor is high, the centrifugal force is large, the bearing can float along the radial direction after the axial oil outlet and cannot be close to the bearing, so that the lubrication of the high-speed bearing is insufficient, the over-temperature risk of the bearing is generated, the service life of the bearing is seriously influenced, and great potential safety hazards exist in the running process of the bearing.

In view of the above problems, the present inventors have made active research and innovation based on practical experience and professional knowledge that is abundant over many years in engineering applications of such products, in order to create a single-rod bearing for high-speed rotation, which is more practical.

Disclosure of Invention

The present invention is directed to a single-rod bearing for high-speed rotation that overcomes the problems of the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: a single-rod bearing for high-speed rotation, comprising: the bearing rod is sequentially provided with a rolling step shaft and a fixed step shaft along the axial direction;

the bearing sleeve is sleeved on the rolling step shaft, a plurality of roller pins are uniformly arranged in an annular gap between the bearing sleeve and the bearing rod along the circumferential direction, and an oil collecting cavity is formed by two adjacent roller pins and the inner hole wall;

the bearing gasket is sleeved on the fixed step shaft and abuts against a limiting interface between the rolling step shaft and the fixed step shaft;

the end part of the rolling step shaft is provided with a limiting flange which is matched with the bearing gasket and used for limiting the bearing sleeve to move along the axial direction, oil inlet grooves which are obliquely arranged along the radial direction are formed in the end surfaces of the two sides of the bearing sleeve, the bearing rod is provided with a first oil hole and a second oil hole which are used for discharging lubricating oil, the first oil hole and the oil inlet grooves are communicated with the annular gap, and the first oil hole is communicated with the second oil hole.

Further, the first oil hole penetrates along an axis perpendicular to the bearing rod;

the second oil hole penetrates along the axis of the bearing rod.

Furthermore, the oil inlet groove is linear or circular and penetrates through the inner hole from the outer edge along the radial direction;

the oil inlet groove becomes deeper gradually from the outer edge to the inner hole.

Furthermore, the bottom of the oil inlet groove is of an arc-shaped structure, and the depth of the oil inlet groove gradually becomes deeper along the inclined direction;

one end of the oil collecting cavity close to the inner hole corresponds to the oil collecting cavity;

during the high-speed rotation of the bearing sleeve, the oil inlet groove forms a high-pressure side positioned on the outer edge and a low-pressure side positioned on the inner hole by pressure difference generated by rotation.

Furthermore, gaps exist between the two end faces of the bearing sleeve and the limiting flange and between the two end faces of the bearing sleeve and the bearing gasket;

the outer edge of the limiting flange is positioned on the high-pressure side of the oil inlet groove;

the outer edge of the bearing washer is located between the high pressure side and the low pressure side.

Furthermore, two notches are uniformly distributed on the bearing gasket along the circumferential direction;

the bottoms of the two notches are lower than the low-pressure side.

The notch is in a semi-circular arc shape or an inverted trapezoid shape or a V shape or a rectangle shape.

Furthermore, two inclined straight edges of the linear oil inlet groove tend to gather towards the inner hole along the outer edge, and are respectively tangent to the outer edges of the two adjacent rolling needles.

Further, the straight distance between the tangent points of the two inclined straight edges and the two adjacent needle rollers is equal to the straight distance between the tangent points of the two needle rollers and the bearing sleeve.

Furthermore, two arc edges of the oil inlet groove in the arc shape are bulged towards the direction of the outer edge and are respectively tangent to the outer edges of the two rolling needles arranged at intervals;

and two oil collecting cavities are arranged between the two tangent points.

Furthermore, the two arc-shaped edges have the same circle center, and the top arcs close to the outer edge are respectively tangent to the two arc-shaped edges.

Furthermore, a locking groove is formed in the end part of the fixed step shaft;

the groove depth of the locking groove becomes gradually shallower along the axis toward a direction away from the rolling step shaft.

The invention has the beneficial effects that: according to the invention, through the arrangement of the radial oil inlet groove on the end face of the bearing sleeve, automatic and timely lubricating oil supplementation can be realized when the bearing rotates, the rotating resistance of the two end faces of the bearing sleeve is reduced, and when the bearing rotates at a high speed, the dynamic pressure generated in the radial oil inlet groove can enable the lubricating oil to enter the bearing along the radial oil groove and be quickly discharged from the second oil hole after passing through the first oil hole, so that the heat generated by the bearing can be timely taken away while the bearing is lubricated, a quick cooling effect is realized, the over-temperature risk of the bearing is avoided, 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 embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is also possible for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a single-rod bearing for high-speed rotation according to an embodiment of the present invention;

FIG. 2 is a half sectional view A-A of FIG. 1;

FIG. 3 is a schematic structural diagram of an oil inlet tank according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of an oil inlet tank in the second embodiment of the present invention;

FIG. 5 is an isometric view of a bearing sleeve in an embodiment of the invention;

FIG. 6 is a partial cutaway view B-B of FIG. 4;

FIG. 7 is a structural view of a linear oil inlet tank and an oil collecting cavity according to an embodiment of the present invention;

FIG. 8 is a structural view of an arc-shaped oil inlet tank and an oil collecting chamber in a second embodiment of the present invention;

FIG. 9 is a schematic view of a bearing shim according to an embodiment of the present invention;

fig. 10 is a schematic view of the installation of the bearing on the bearing seat in the embodiment of the invention.

Reference numerals are as follows: 10. a bearing rod; 11. a rolling step shaft; 12. a fixed step shaft; 121. a locking groove; 13. a limiting flange; 14. a first oil hole; 15. a second oil hole; 20. a bearing housing; 21. an oil inlet groove; 211. an arc-shaped structure; 30. a bearing spacer; 31. a notch; 40. rolling needles; 50. an oil collecting cavity.

Detailed Description

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.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example one

The single rod bearing for high-speed rotation shown in fig. 1 to 2 includes: the bearing comprises a bearing rod 10, a bearing sleeve 20 and a bearing gasket 30, wherein the bearing rod 10 is sequentially provided with a rolling step shaft 11 and a fixed step shaft 12 along the axial direction; the bearing sleeve 20 is sleeved on the rolling step shaft 11, a plurality of roller pins 40 are uniformly arranged in an annular gap between the bearing sleeve 20 and the bearing rod 10 along the circumferential direction, and an oil collecting cavity 50 is formed by two adjacent roller pins 40 and the inner hole wall; the bearing gasket 30 is sleeved on the fixed step shaft 12 and is abutted against a limit interface between the rolling step shaft 11 and the fixed step shaft 12; the end of the rolling step shaft 11 is provided with a limiting flange 13 which is matched with the bearing gasket 30 to limit the axial movement of the bearing sleeve 20, the end surfaces of the two sides of the bearing sleeve 20 are respectively provided with an oil inlet groove 21 which is arranged along the radial direction in an inclined manner, the bearing rod 10 is provided with a first oil hole 14 and a second oil hole 15 which are used for discharging lubricating oil, the first oil hole 14 and the oil inlet groove 21 are both communicated with the annular gap, and the first oil hole 14 is communicated with the second oil hole 15. The first oil hole 14 is arranged to penetrate along an axis perpendicular to the bearing rod 10; the second oil hole 15 is provided through the bearing rod 10 along the axis thereof. The oil inlet grooves 21 on the end surfaces on two sides are symmetrically arranged relative to the perpendicular planes of the two end surfaces on the bearing sleeve 20, namely, the oil inlet groove 21 on one side end surface is inclined clockwise, the oil inlet groove 21 on the other side end surface is inclined anticlockwise, and the oil inlet grooves 21 on the end surfaces on two sides are in one-to-one correspondence.

According to the invention, the radial oil inlet grooves 21 are symmetrically arranged on the end surface of the bearing sleeve 20, so that lubricating oil can be automatically and timely supplemented while the bearing rotates, the rotating resistance of the two end surfaces of the bearing sleeve 20 is reduced, when the bearing rotates at a high speed, the lubricating oil can enter the bearing along the radial inclined oil inlet grooves 21 and can be quickly discharged from the second oil hole 15 after passing through the first oil hole 14, the heat generated by the bearing is timely taken away while the bearing is lubricated, a quick cooling effect is achieved, the over-temperature risk of the bearing is avoided, and the service life of the bearing is prolonged.

In the preferred embodiment of the present invention, as shown in fig. 3, the oil inlet slot 21 is linear and penetrates through the inner hole from the outer edge along the radial direction; the oil feed groove 21 becomes deeper gradually from the outer edge to the inner hole.

Specifically, the groove bottom depth is changed on the basis of circumferential inclination of the oil inlet groove 21, the inclination angle of one end facing the inner hole is increased, the contact area between lubricating oil and the roller pins 40 is increased, 3 oil inlet grooves 21 are uniformly distributed along the circumferential direction, when the bearing sleeve 20 rotates in the direction same as the inclination direction of the oil inlet groove 21, the outer edge pressure of the oil inlet groove 21 is greater than the inner hole pressure, the lubricating oil quickly enters the inside of the bearing, and under the action of pressure difference, the lubricating oil quickly passes through the first oil hole 14 and the second oil hole 15 to be discharged out of the bearing, the bearing is cooled while the roller pins 40 are lubricated, and the service life of the bearing is prolonged.

When the bearing sleeve 20 rotates at a high speed, the lubricating oil has a certain acceleration under the action of the rotating speed, so that the lubricating oil can rapidly enter between the two needle rollers 40 to synchronously play roles of lubrication and rapid cooling, but before the lubricating oil enters the oil collecting cavity 50, the lubricating oil impacts the oil inlet groove 21 due to the inclination angle of the oil inlet groove 21, so that the entering speed of the lubricating oil is reduced, and therefore, in order to ensure the fluidity of the lubricating oil, as shown in fig. 6, the bottom of the oil inlet groove 21 is in an arc-shaped structure 211, and the depth along the inclination direction is gradually increased; one end of the oil collecting cavity close to the inner hole corresponds to the oil collecting cavity 50; during the high-speed rotation of the bearing housing 20, the oil feed groove 21 is formed by a pressure difference generated by the rotation to a high pressure side at the outer edge and a low pressure side at the inner hole.

On the basis of the above embodiment, gaps exist between the two end faces of the bearing sleeve 20 and the limiting flange 13 and the bearing gasket 30; the outer edge of the limiting flange 13 is positioned on the high-pressure side of the oil inlet groove 21; the outer edge of the bearing gasket 30 is located between the high-pressure side and the low-pressure side, and plays a role in protecting the inner roller pin 40 due to the existence of the gap between the two end faces, the rotating feasibility of the bearing sleeve 20 is ensured, the drainage speed of the oil inlet groove 21 to the lubricating oil is increased, the limit flange 13 and the bearing gasket 30 form negative pressure in the annular gap through the rotating oil inlet groove 21, the lubricating oil can smoothly enter the bearing, and the bearing can be fully lubricated.

In order to accelerate the rapid discharge of the lubricating oil, as shown in fig. 9, two notches 31 are uniformly distributed on the bearing gasket 30 along the circumferential direction; and the bottoms of the two notches 31 are lower than the low-pressure side, so that the bearing sleeve 20 plays a role in indirectly balancing the oil injection pressure formed by the oil inlet groove 21 in the rotation process, lubricating oil is discontinuously pushed to be rapidly discharged from the first oil hole 14 and the second oil hole 15, and the cross section of the notch 31 adopts a semi-circular arc structure, an inverted trapezoid structure, a V-shaped structure, a rectangular structure and the like.

As shown in fig. 7, the linear oil inlet groove 21 preferably has two inclined straight edges converging toward the inner bore along the outer edge, and the two inclined straight edges are respectively tangent to the outer edges of the two adjacent needle rollers 40. The distance between the two oblique straight edges and the tangent point of the two adjacent roller pins 40 is equal to the distance between the two roller pins 40 and the tangent point of the bearing sleeve 20.

Specifically, the two inclined straight edges are in a gathering trend, so that lubricating oil enters from the wide opening of the outer edge of the oil inlet groove 21 and smoothly enters the oil collecting cavity 50 from the narrow opening of the inner hole after flowing through the two inclined straight edges, and a guiding effect is achieved on the lubricating oil.

In order to avoid potential safety hazards caused by instable installation when the bearing rotates at a high speed, the end part of the fixed step shaft 12 is provided with a locking groove 121; the groove depth of the locking groove 121 becomes gradually shallower along the axis in a direction away from the rolling step shaft 11.

As shown in fig. 10, when the bearing is mounted on the bearing seat, the locking groove 121 is pressed by the socket head cap screw along the direction perpendicular to the axis of the bearing, and since the bottom of the locking groove 121 is inclined along the axial direction and becomes gradually shallower towards the direction away from the rolling step shaft 11, the bearing rod 10 moves along the axial direction towards the direction away from the bearing sleeve 20 as the socket head cap screw is screwed in continuously, thereby effectively ensuring the locking and fixing of the bearing and improving the mounting reliability.

Example two

The difference between this embodiment and the first embodiment is that the oil inlet groove 21 has a different structure, and the remaining structures are the same, and are not described herein again, and in this embodiment, as shown in fig. 4, the oil inlet groove 21 is arc-shaped and radially penetrates from the outer edge to the inner hole; the oil feed groove 21 becomes deeper gradually from the outer edge to the inner hole.

Specifically, the depth of the groove bottom is changed on the basis of circumferential inclination of the oil inlet groove 21, so that the inclination angle of one end facing the inner hole is increased, the contact area between lubricating oil and the roller pins 40 is increased, 3 oil inlet grooves 21 are uniformly distributed along the circumferential direction, when the bearing sleeve 20 rotates in the direction same as the inclination direction of the oil inlet groove 21, the outer edge pressure of the oil inlet groove 21 is greater than the inner hole pressure, the lubricating oil quickly enters the inside of the bearing, and under the action of pressure difference, the lubricating oil quickly passes through the first oil hole 14 and the second oil hole 15 to be discharged out of the bearing, so that the lubricating roller pins 40 are lubricated, the temperature of the bearing is reduced, and the service life of the bearing is prolonged.

On the basis of the above embodiment, as shown in fig. 8, the oil inlet groove 21 in the shape of a circular arc has two arc-shaped edges protruding toward the outer edge and respectively tangent to the outer edges of the two needle rollers 40 arranged at intervals; and two oil collection chambers 50 exist between the two tangent points.

Specifically, two arc limits are towards the uplift structure of outside marginal direction, the impact of the relative inlet tank 21 of lubricating oil has been avoided, the influence to the lubricating oil flow speed has been reduced, the mobility of lubricating oil has been guaranteed, two arc topside are tangent with two kingpin 40 outward flanges that the interval set up, the end of producing oil that makes the oil feed chamber corresponds two oil collecting chamber 50, the inflow of lubricating oil has been increased when guaranteeing circulation speed, further accelerated the thermal scattering and disappearing of bearing, and sufficient lubricating oil has satisfied the inside lubricated demand of bearing.

Preferably, as the above embodiment, the two arc-shaped sides have the same center, and the top arcs near the outer edge are tangent to the two arc-shaped sides respectively.

The first arc-shaped edge which is positioned at the same circle center O and takes Rm1 as the radius and the second arc-shaped edge which takes Rm2 as the radius are in a parallel state, and the arc at the top of the first arc-shaped edge and the arc at the two arc-shaped edges are in tangent transition arrangement, so that the resistance of lubricating oil when entering the oil inlet groove 21 is reduced, the inflow speed of the lubricating oil is accelerated, the flowability of the lubricating oil is further improved, and the heat generated by the bearing can be taken away in time.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A single-rod bearing for high-speed rotation, comprising:

the bearing rod (10) is sequentially provided with a rolling step shaft (11) and a fixed step shaft (12) along the axial direction;

the bearing sleeve (20) is sleeved on the rolling step shaft (11), a plurality of roller pins (40) are uniformly arranged in an annular gap between the bearing sleeve (20) and the bearing rod (10) along the circumferential direction, and an oil collecting cavity (50) is formed between each two adjacent roller pins (40) and the inner hole wall;

the bearing gasket (30) is sleeved on the fixed step shaft (12) and abutted against a limiting interface between the rolling step shaft (11) and the fixed step shaft (12);

the end part of the rolling step shaft (11) is provided with a limiting flange (13) which is matched with the bearing gasket (30) and used for limiting the bearing sleeve (20) to move along the axial direction, oil inlet grooves (21) which are obliquely arranged along the radial direction are arranged on the end surfaces of two sides of the bearing sleeve (20), a first oil hole (14) and a second oil hole (15) which are used for discharging lubricating oil are arranged on the bearing rod (10), the first oil hole (14) and the oil inlet grooves (21) are communicated with the annular gap, and the first oil hole (14) is communicated with the second oil hole (15);

the oil inlet groove (21) is linear or circular and penetrates through the inner hole from the outer edge along the radial direction;

the depth of the oil inlet groove (21) from the outer edge to the inner hole is gradually deepened;

the oil inlet groove (21) is in a linear shape, two inclined straight edges of the oil inlet groove (21) tend to gather towards the inner hole along the outer edge, so that lubricating oil enters from the wide opening of the outer edge of the oil inlet groove (21) and smoothly enters the oil collecting cavity (50) from the narrow opening of the inner hole after flowing through the two inclined straight edges, and the lubricating oil is tangent to the outer edge of the two adjacent roller pins (40) respectively, the oil inlet groove (21) and the oil collecting cavity (50) form a closed flow channel, so that the lubricating oil can completely enter the oil collecting cavity (50) and pass through the middle of the two roller pins (40), and the flowability of the lubricating oil is ensured.

2. The single rod bearing for high speed rotation according to claim 1, wherein the oil feed groove (21) has a bottom portion in an arc-shaped configuration (211) and a depth in an inclined direction gradually becomes deeper;

one end of the oil collecting cavity close to the inner hole corresponds to the oil collecting cavity (50);

during the high-speed rotation of the bearing sleeve (20), the oil inlet groove (21) is formed by the pressure difference generated by rotation and is positioned on the high-pressure side of the outer edge and the low-pressure side of the inner hole.

3. The single rod bearing for high speed rotation according to claim 2, wherein there are gaps between both end faces of the bearing housing (20) and the retainer flange (13) and the bearing washer (30);

the outer edge of the limiting flange (13) is positioned on the high-pressure side of the oil inlet groove (21);

the outer edge of the bearing washer (30) is located between the high pressure side and the low pressure side.

4. The single-rod bearing for high-speed rotation according to claim 3, wherein the bearing washer (30) is uniformly provided with two notches (31) along the circumferential direction;

the bottoms of the two notches (31) are lower than the low-pressure side.

5. The single-rod bearing for high-speed rotation according to claim 1, wherein the linear distance between the tangent points of two inclined straight edges and two adjacent needle rollers (40) is equal to the linear distance between the tangent points of two needle rollers (40) and the bearing sleeve (20).

6. The single rod bearing for high speed rotation according to any one of claims 1 to 4, wherein the oil feed groove (21) is in a circular arc shape, and two arc-shaped sides thereof are raised in an outer edge direction and are tangent to outer edges of two needle rollers (40) which are spaced apart from each other, respectively;

and two oil collecting cavities (50) are arranged between two tangent points.

7. The single rod bearing for high speed rotation of claim 6, wherein the two arc-shaped sides have the same center, and the top arc near the outer edge is tangent to the two arc-shaped sides, respectively.

8. The single rod bearing for high speed rotation according to claim 1, wherein the end of the fixed step shaft (12) is provided with a locking groove (121);

the depth of the locking groove (121) becomes gradually shallower in the direction away from the rolling step shaft (11) along the axis.