CN115559991A - Double-row angular contact ball bearing - Google Patents
Double-row angular contact ball bearing Download PDFInfo
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- CN115559991A CN115559991A CN202210992091.6A CN202210992091A CN115559991A CN 115559991 A CN115559991 A CN 115559991A CN 202210992091 A CN202210992091 A CN 202210992091A CN 115559991 A CN115559991 A CN 115559991A
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- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
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- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
- F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
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- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
- F16C19/527—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to vibration and noise
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- 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
- F16C33/32—Balls
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- 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
- F16C33/58—Raceways; Race rings
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- 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
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The utility model relates to the field of bearings, especially, relate to a biserial angular contact ball bearing, it includes inner circle and the outer lane of coaxial setting, be provided with first steel ball and second row steel ball between inner circle and the outer lane, the symmetry is provided with outer lane left side channel and outer lane right side channel on the outer lane, the diameter of outer lane left side channel equals the diameter of outer lane right side channel and is De, the symmetry is provided with inner circle left side channel and inner circle right side channel on the inner circle, the diameter of inner circle left side channel equals the diameter of inner circle right side channel and is di, first row steel ball cooperation is installed between outer lane left side channel and inner circle left side channel, the cooperation of second row steel ball is installed between outer lane right side channel and inner circle right side channel, misplace the setting in the axial direction between outer lane left side channel and the inner circle left side channel and between outer lane right side channel and the inner circle right side channel. The bearing has the advantages that the axial and radial combined load of the bearing is improved, and the vibration noise of the bearing is reduced.
Description
Technical Field
The application relates to the field of bearings, in particular to a double-row angular contact ball bearing.
Background
The bearing is widely applied to a rotating mechanism, plays roles in transmission, support, friction reduction, load bearing and the like, and is generally used in automobile hubs, machine tool spindles, oil pumps, air compressors, various transmissions, printing machinery and the like at present; the angular contact ball bearing can bear radial load and axial load at the same time and can work at higher rotating speed. The larger the contact angle, the higher the axial load capacity, the contact angle being the angle between the line connecting the contact points of the ball and the raceway in the radial plane and the line perpendicular to the axis of the bearing.
At present, in order to meet the development requirements of environmental protection and energy saving in the mechanical industry, a bearing needs to be designed with light weight and low noise, namely, the bearing bears larger load under the same external dimension or has smaller dimension under the same load, and meanwhile, the vibration noise of the bearing is reduced; the inner ring and the outer ring of the existing double-row angular contact ball bearing are both provided with a channel for sliding the steel balls, and two sides of the channel are provided with flanges for limiting the steel balls.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: the existing double-row angular contact ball bearing has small radial and axial bearing capacity due to the limitation of structure and precision (common level), and when the double-row cross contact bearing is installed, steel balls in the bearing are inconvenient to install.
Disclosure of Invention
In order to improve the combined load of the circumferential direction and the radial direction of the bearing and enable the bearing to be convenient to assemble, the application provides a double-row angular contact ball bearing.
The application provides a double row angular contact ball bearing adopts following technical scheme:
the utility model provides a biserial angular contact ball bearing, includes the inner circle and the outer lane of coaxial setting, be provided with first steel ball and the second row of steel ball between inner circle and the outer lane, first steel ball and the second row of steel ball all contain a plurality of steel balls, the steel ball diameter is the Dw, the symmetry is provided with outer lane left side channel and outer lane right side channel on the outer lane, the diameter of outer lane left side channel equals the diameter of outer lane right side channel and is De, the symmetry is provided with inner circle left side channel and inner circle right side channel on the inner circle, the diameter of inner circle left side channel equals the diameter of inner circle right side channel and is di, the cooperation of first steel ball is installed between outer lane left side channel and inner circle left side channel, the cooperation of second row steel ball is installed between outer lane right side channel and inner circle right side channel and the dislocation set in the axial direction between outer lane left side channel and the inner circle right side channel.
By adopting the technical scheme, the improvement that the dislocation setting is carried out on the positions of the inner ring left channel and the outer ring right channel on the outer ring and the positions of the inner ring left channel and the inner ring right channel on the inner ring is adopted, when the steel ball is installed, compared with the bearing with the traditional specification, the distance between the inner ring and the outer ring for installing the steel ball is increased, on one hand, the steel ball can be more conveniently assembled between the inner ring and the outer ring, on the other hand, the number of the steel balls additionally arranged between the inner ring and the outer ring or the diameter of the installed steel ball can be changed, and therefore the effect of improving the large axial and radial combined load of the bearing is achieved.
Optionally, a flange in the middle of the outer ring is arranged between the channel on the left side of the outer ring and the channel on the right side of the outer ring, the diameter of the flange in the middle of the outer ring is D2, one side of the channel on the left side of the outer ring, which is close to the outside of the bearing, is provided with the flange on the left side of the outer ring, the diameter of the flange on the left side of the outer ring is D1, one side of the channel on the right side of the outer ring, which is close to the outside of the bearing, is provided with the flange on the right side of the outer ring, the diameter of the flange on the right side of the outer ring is D3, D1= D3, and D2 is smaller than D1 or D3.
By adopting the technical scheme, the distance for installing the steel ball between the outer ring and the inner ring on the bearing with the same specification can be increased by improving the sizes of the two sides of the left-side channel and the right-side channel of the outer ring, so that the steel ball can be better installed in the corresponding left-side channel and right-side channel of the outer ring.
Optionally, an inner ring middle rib is arranged between the inner ring left channel and the inner ring right channel, the diameter of the inner ring middle rib is d2, one side, close to the outside of the bearing, of the inner ring left channel is provided with an inner ring left rib, the diameter of the inner ring left rib is d1, one side, close to the outside of the bearing, of the inner ring right channel is provided with an inner ring right rib, the diameter of the inner ring right rib is d3, d1= d3, and d2 is smaller than d1 or d3.
By adopting the technical scheme, the distance between the inner ring and the outer ring of the bearing with the same specification can be increased by improving the sizes of the two sides of the inner ring left channel and the inner ring right channel, so that the steel balls can be better arranged in the inner ring left channel and the inner ring right channel which correspond to the inner part of the inner ring, in addition, when the diameter of the inner ring left rib and the diameter of the inner ring right rib are greater than the diameter of the inner ring middle rib, the axial load born by the bearing can be increased, and meanwhile, the steel balls are prevented from falling from the inner ring left channel and the inner ring right channel.
Optionally, the diameter D1 of the outer ring left rib or the diameter D3 of the outer ring right rib is approximately equal to the diameter De of the outer ring left channel or the diameter De of the outer ring right channel, and the diameter D2 of the inner ring middle rib is approximately equal to the diameter di of the inner ring left channel or the diameter di of the inner ring right channel.
By adopting the technical scheme, the diameters of the left side flange and the right side flange of the outer ring are close to the diameters of the left channel and the right channel of the outer ring as much as possible, so that the steel balls can be conveniently and better arranged in the channels between the inner ring and the outer ring; compared with the traditional bearing, the diameter of the middle flange of the inner ring is reduced, so that the diameter of the middle flange of the inner ring is close to the diameter of the left channel of the inner ring or the diameter of the right channel of the inner ring as much as possible, and therefore when the steel balls are installed, the inner ring can be close to one side of the outer ring as much as possible, the inner ring is moved to the lowest end of the outer ring, the distance between the inner ring and the outer ring for installing the steel balls is increased, and the steel balls with larger specifications can be installed or more steel balls can be installed.
Optionally, the diameter D1 of the flange on the left side of the outer ring or the diameter D3 of the flange on the right side of the outer ring — the diameter D2 of the middle flange of the outer ring = (0.35-0.45) × the diameter Dw of the steel ball; the diameter d1 of the rib on the left side of the inner ring or the diameter d3 of the rib on the right side of the inner ring-the diameter d2 of the middle rib of the inner ring = (0.35-0.45) × the diameter Dw of the steel ball.
By adopting the technical scheme, the depth of the steel ball embedded into the outer ring and the inner ring can be obtained through the calculation formula, the steel ball can be ensured to be arranged between the inner ring and the outer ring as much as possible, and the bearing can bear larger axial and radial loads.
Optionally, the distance between the outer ring left rib and the inner ring left rib, the distance between the outer ring middle rib and the inner ring middle rib, and the distance between the outer ring right rib and the inner ring right rib are all about (0.775-0.825) × steel ball diameter Dw.
By adopting the technical scheme, the maximum gap for installing the steel balls between the inner ring and the outer ring can be obtained through the calculation formula, so that the quantity of the steel balls with the same specification can be ensured to be installed between the inner ring and the outer ring, and the bearing capacity of the bearing is improved.
Optionally, the nominal contact angle α between the first row of steel balls and the outer ring left channel and the inner ring left channel is 25 ° to 35 °, and the nominal contact angle α between the second row of steel balls and the outer ring right channel and the inner ring right channel is 25 ° to 35 °.
By adopting the technical scheme, the bearing has larger axial load bearing capacity when the nominal contact angle is in the range of 25-35 degrees.
Optionally, a pair of retainers matched with the first row of steel balls and the second row of steel balls are coaxially arranged between the inner ring and the outer ring.
By adopting the technical scheme, the retainer can keep the distance between the steel balls, prevent the steel balls from contacting, reduce friction, enable the steel balls to be uniformly distributed between the inner ring and the outer ring, further enable the load to be uniformly distributed, guide the steel balls in a no-load area, improve the rolling condition in the bearing and prevent destructive sliding.
Optionally, the surface roughness of the steel balls and the spherical error of the steel balls are reduced by each steel ball on the first row of steel balls and the second row of steel balls.
By adopting the technical scheme, the steel ball is processed, the rotation precision of the bearing can be improved, and the vibration noise and the friction heating of the bearing are reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the bearing that this application designed, through carrying out dislocation set's improvement to outer lane left side channel and inner circle left side channel and outer lane right side channel and inner circle right side channel at bearing width direction, make the point that bears axial and radial force between steel ball and inner circle and the outer lane change, and the diameter through outer lane left side flange, the diameter of flange and the diameter of outer lane right side flange and the diameter of inner circle left side flange in the middle of the outer lane, the diameter of flange and the diameter of inner circle right side flange advance all to carry out corresponding increase and reduction, make the bearing of this application design traditional bearing with specification the same type have following effect relatively: the rated load of the bearing is improved to be more than 1.15 times of the original rated load; the service life of the bearing is prolonged to more than 1.5 times of the original service life; the steel balls can be more conveniently arranged between the inner ring and the outer ring, and the mounting quantity of the steel balls is increased or the steel balls with larger specification can be mounted; the vibration and the noise of the bearing are reduced; the temperature rise in the bearing rotation process is reduced; the maintenance requirements of the bearing are reduced, and the production efficiency of customers is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of a bearing according to an embodiment of the present application;
FIG. 2 is a schematic view of a bearing outer race in accordance with an embodiment of the present application;
FIG. 3 is a schematic view of an inner race of a bearing according to an embodiment of the present application;
FIGS. 4, 5, 6 and 7 are schematic structural diagrams of the embodiment of the present application showing the mounting of the steel ball by the bearing;
fig. 8, 9, 10 and 11 are schematic structural diagrams of mounting steel balls of the same specification of a traditional bearing.
Description of reference numerals: 1. an outer ring; 11. a channel on the left side of the outer ring; 12. a channel on the right side of the outer ring; 13. the middle flange of the outer ring; 14. the left side of the outer ring is provided with a flange; 15. the right side of the outer ring is provided with a flange; 2. an inner ring; 21. a left channel of the inner ring; 22. a right channel of the inner ring; 23. the middle flange of the inner ring; 24. the left side of the inner ring is provided with a flange; 25. the right side of the inner ring is provided with a flange; 3. a steel ball; 4. a cage.
Detailed Description
The present application is described in further detail below with reference to figures 1-11.
The embodiment of the application discloses a double-row angular contact ball bearing.
Referring to fig. 1, a double-row angular contact ball bearing includes an outer ring 1 and an inner ring 2, the inner ring 2 and the outer ring 1 are coaxially disposed, a plurality of steel balls 3 are slidably disposed between the inner ring 2 and the outer ring 1, the diameter of the steel balls 3 is Dw, the plurality of steel balls 3 are divided into a first row of steel balls and a second row of steel balls between the inner ring 2 and the outer ring 1, and a pair of retainers 4 are further disposed between the inner ring 2 and the outer ring 1, in this embodiment, the retainers 4 may be nylon crown type retainers 4, steel plate stamping crown type retainers 4, and steel plate stamping C type retainers 4, but not limited to the above three structural forms of retainers 4, a plurality of mounting holes are opened on the retainers 4, and the first row of steel balls and the second row of steel balls may be mounted and matched in the mounting holes on the corresponding retainers 4.
Referring to fig. 1, 2 and 3, an outer ring left channel 11 and an outer ring right channel 12 are symmetrically arranged on the inner surface of the outer ring 1, an inner ring left channel 21 and an inner ring right channel 22 are symmetrically arranged on the outer surface of the inner ring 2, a first row of steel balls are slidably matched between the outer ring left channel 11 and the inner ring left channel 21, a second row of steel balls are slidably matched between the outer ring right channel 12 and the inner ring right channel 22, the outer ring left channel 11 and the outer ring right channel 12 are both concave arc surfaces, a revolving shaft of the outer ring left channel 11 and a revolving shaft of the outer ring right channel 12 coincide with the axis of the outer ring 1, the inner ring left channel 21 and the inner ring right channel 22 are both convex arc surfaces, and the revolving shaft of the inner ring left channel 21 and the revolving shaft of the inner ring right channel 22 coincide with the axis of the inner ring 2.
The outer ring left side channel 11 and the inner ring left side channel 21, and the outer ring right side channel 12 and the inner ring right side channel 22 are arranged in a staggered mode in the width direction of the bearing, the outer ring left side channel 11 and the outer ring right side channel 12 are located between the inner ring left side channel 21 and the inner ring right side channel 22, when the steel balls 3 are installed between the outer ring 1 and the inner ring 2, the staggered outer ring left side channel 11, the inner ring left side channel 21, the outer ring right side channel 12 and the inner ring right side channel 22 can enable the inner ring 2 to approach the inner surface of the outer ring 1 as much as possible, so that the distance for installing the steel balls 3 between the inner ring 2 and the outer ring 1 is increased, and the steel balls 3 are more conveniently installed into the corresponding channels; the diameter of the outer ring left channel 11 is equal to that of the outer ring right channel 12, the diameter of the outer ring left channel 11 and the diameter of the outer ring right channel 12 are both De, the diameter of the inner ring left channel 21 is equal to that of the inner ring right channel 22, and the diameter of the inner ring left channel 21 and the diameter of the inner ring right channel 22 are both di; the nominal contact angle alpha between the first row of steel balls and the outer ring left channel 11 and the inner ring left channel 21 and the nominal contact angle alpha between the second row of steel balls and the outer ring right channel 12 and the inner ring right channel 22 are both 25-35 degrees, in the embodiment of the application, the nominal contact angle alpha is 30 degrees for example, and the nominal contact angle refers to an included angle between a normal line of a contact point of the corresponding channel and the steel ball 3 and a radial plane of the bearing.
Referring to fig. 1, 2 and 3, a raised outer ring middle rib 13 is arranged between an outer ring left channel 11 and an outer ring right channel 12, the diameter of the outer ring middle rib 13 is D2, an outer ring left rib 14 is arranged on one side of the outer ring left channel 11 away from the outer ring middle rib 13, the diameter of the outer ring left rib 14 is D1, an outer ring right rib 15 is arranged on one side of the outer ring right channel 12 away from the outer ring middle rib 13, the diameter of the outer ring right rib 15 is D3, the diameter D1 of the outer ring left rib 14 is equal to the diameter D3 of the outer ring right rib 15, and the diameter D2 of the outer ring middle rib 13 is smaller than the diameter D1 of the outer ring left rib 14 or the diameter D3 of the outer ring right rib 15; a concave inner ring middle rib 23 is arranged between the inner ring left channel 21 and the inner ring right channel 22, the diameter of the inner ring middle rib 23 is d2, an inner ring left rib 24 is arranged on one side, away from the inner ring middle rib 23, of the inner ring left channel 21, the diameter of the inner ring left rib 24 is d1, an inner ring right rib 25 is arranged on one side, away from the inner ring middle rib 23, of the inner ring right channel 22, the diameter of the inner ring right rib 25 is d3, the diameter d1 of the inner ring left rib 24 is equal to the diameter d3 of the inner ring right rib 25, and the diameter d2 of the inner ring middle rib 23 is smaller than the diameter d1 of the inner ring left rib 24 or the diameter d3 of the inner ring right rib 25; in the rotating process of the bearing, the outer ring middle flange 13 and the inner ring middle flange 23 can prevent a first row of steel balls and a second row of steel balls from approaching each other, the outer ring left side flange 14, the outer ring right side flange 15 and the inner ring left side flange 24 can prevent the first row of steel balls and the second row of steel balls from sliding out of the bearing, and therefore the outer ring left side flange 14, the outer ring middle flange 13, the outer ring right side flange 15 and the inner ring left side flange 24, the inner ring middle flange 23 and the inner ring right side flange 25 can limit the steel balls 3 in the bearing moving process.
Referring to fig. 8, 9, 10 and 11, the conventional double-row angular contact ball bearing with seal outer ring 1 and inner ring 2 both adopt a design method of a deep groove ball bearing, that is: the diameter D1 of the outer ring left side rib 14, the diameter D2 of the outer ring middle rib 13 and the diameter D3 of the outer ring right side rib 15 are the same, the diameter D1 of the inner ring left side rib 24, the diameter D2 of the inner ring middle rib 23 and the diameter D3 of the inner ring right side rib 25 are also the same, and the diameter De of the two channels of the outer ring 1-the diameter D2 of the outer ring middle rib 13 is approximately equal to 0.7 of the diameter Dw of the steel ball 3.
Referring to fig. 4, 5, 6, and 7, in the double-row angular contact ball bearing of the present application, compared to a conventional double-row angular contact ball bearing, a diameter D1 of an outer ring left rib 14 and a diameter D3 of an outer ring right rib 15 are increased to be close to the size of a diameter De of an outer ring left channel 11 and a diameter De of an outer ring right channel 12, that is: d1= D3 ≈ De, and the diameter D1 of the outer ring left side rib 14 and the diameter D3 of the outer ring right side rib 15 are much larger than the diameter D2 of the outer ring middle rib 13, that is: d1 or D3-D2 ≈ (0.35-0.45) Dw; the diameter d2 of the inner ring middle rib 23 is reduced and approaches the sizes of the diameter di of the inner ring left side channel 21 and the diameter di of the inner ring right side channel 22, namely: d2 ≈ di, the diameter d2 of the inner ring middle rib 23 is much smaller than the diameter d1 of the inner ring left rib 24 or the diameter d3 of the inner ring right rib 25, that is: d1 or d3-d2 ≈ (0.35-0.45) Dw.
Referring to fig. 8, 9, 10, and 11, when the steel balls 3 are installed, the same-side cambered surfaces of the inner ring 2 and the outer ring 1 are aligned, and then the inner ring 2 is moved until the ribs (including D1, D2, and D3) of the inner ring 2 and the ribs (including D1, D2, and D3) of the outer ring 1 contact at the lower end, where the distance between the ribs (including D1, D2, and D3) of the inner ring 2 and the ribs (including D1, D2, and D3) of the outer ring 1 at the uppermost end is L ≈ (1.1-1.3) Dw, the eccentric displacement between the inner ring 2 and the outer ring 1 is e = L/2 ≈ (0.55-0.65) Dw, and the number of the steel balls 3 loaded in the inner ring 2 and the outer ring 1 is 9.
Referring to fig. 4, 5, 6, and 7, when installing the steel balls 3, the double-row angular contact ball bearing of the embodiment of the present application first aligns the same-side arc surfaces of the inner ring 2 and the outer ring 1, and then moves the inner ring 2 until the inner ring middle rib 23 and the outer ring middle rib 13 (or the inner ring left rib 24 and the outer ring left rib 14, the inner ring right rib 25, and the outer ring right rib 15) contact at the low end, at this time, the distance between the uppermost inner ring 2 rib (including D1, D2, and D3) and the outer ring 1 rib (including D1, D2, and D3) is L, L ≈ 1.55 to 1.65 Dw, the eccentric distance between the inner ring 2 and the outer ring 1 is e = L/2 ≈ 0.775 to 0.825), at this time, the number of the steel balls 3 is 11, compared with the conventional double-row angular contact ball bearing, at least two more steel balls 3 may be installed, the rated load may be increased by 15% or more by the steel balls 3, and the rated load may be increased by 50% or more; in addition, according to different specifications of the double-row angular contact ball bearing, the number of the steel balls 3 which can be loaded is different by adopting the mode, after the distance L is increased, a worker can load more steel balls 3 with the same specification between the inner ring 2 and the outer ring 1 or increase the diameter of the steel balls 3 and reduce the number of the loaded steel balls 3 according to the requirement of actual working conditions, so that the rated load and the service life of the bearing are increased, and after the distance L is increased, when the bearing is installed, the worker can more conveniently load the steel balls 3 between the inner ring 2 and the outer ring 1.
In the embodiment of the application, the method for calculating the rated dynamic load of the traditional bearing can refer to GB/T6391-2010/ISO: 2007, a calculation formula of the rated dynamic load and the rated service life of the rolling bearing, and a radial basic rated dynamic load formula of the radial ball bearing are as follows:
when Dw is less than or equal to 25.4mm, cr = bmfe (icos alpha) 0.7Z2/3Dw1.8;
when Dw is less than or equal to 25.4mm, cr =3.647bmfe (icos alpha) 0.7Z2/3Dw1.4;
the bm value and the fc value in the formula are respectively shown in table 1 and table 2 in national standard, and the numerical values in the table are suitable for radial contact and angular contact ball bearings with the curvature radius of the inner ring channel not more than 0.52Dw and the curvature radius of the outer ring channel not more than 0.53Dw, and self-aligning ball bearings with the curvature radius of the inner ring channel not more than 0.53 Dw.
The basic rated life formula of the radial ball bearing is as follows:
L10=(Cr/Pr)3；
values of Cr and Pr are referred to GB/T6391-2010/ISO: 2007, calculating numerical values in 5.1 and 5.2 in a calculation formula of the rated dynamic load and the rated service life of the rolling bearing; the life formula is also suitable for estimating the life of a bearing group consisting of two or more sets of single-row bearings in 5.1.2; in this case, the nominal load Cr is calculated for the entire bearing group and the equivalent load Pr is calculated for the total load acting on the bearing group.
The steel ball 3 used in the double-row angular contact ball bearing in the embodiment of the application reduces the roughness of the surface of the steel ball 3 and the roughness of the cambered surfaces of the two channels on the outer ring 1 and the two channels on the inner ring 2, reduces the spherical error of the steel ball 3, and can improve the rotation precision of the bearing and reduce the vibration noise and friction heating of the bearing by adopting the required steel ball 3.
Therefore, the rated dynamic load of the double-row angular contact ball bearing designed by the embodiment of the application is more than 1.15 times of that of a traditional double-row angular contact ball bearing with the same external dimension, the fatigue life of the double-row angular contact ball bearing is more than 1.5 times of that of the traditional double-row angular contact ball bearing with the same external dimension, the vibration noise can be reduced by 5 decibels, the temperature of the bearing is reduced by more than 10 degrees, the running precision of equipment is improved, the vibration noise and the temperature rise are reduced, the maintenance of the bearing is reduced, and the production efficiency of customers is improved.
The bearing of design in this application embodiment can be according to the difference of practical operating mode, the symmetry sets up the sealing washer between inner circle 2 and outer lane 1, two sealing washers are located the both sides that first row steel ball and second were listed as the steel ball, and sealing washer outward flange and inward flange can correspond the joint to outer lane 1 and inner circle 2 on, avoid the bearing at the pivoted in-process, drop from outer lane 1 and inner circle 2, the sealing washer of setting can play sealed, dustproof and the purpose that reduces the noise.
The implementation principle of a double-row angular contact ball bearing of the embodiment of the application is as follows: by improving the positions of an outer ring left channel 11 and an inner ring left channel 21 for placing a first row of steel balls on an inner ring 2 and an outer ring 1 of a bearing and the positions of an outer ring right channel 12 and an inner ring right channel 22 for placing a second row of steel balls 3, and improving the diameter sizes of an outer ring left rib 14, an outer ring middle rib 13 and an outer ring right rib 15 and the diameter sizes of an inner ring left rib 24, an inner ring middle rib 23 and an inner ring right rib 25, more steel balls 3 can be placed between the inner ring 2 and the outer ring 1 of the bearing with the same specification, and the steel balls 3 are easily installed between the inner ring 2 and the outer ring 1, so that the bearing capacity and the service life of the bearing are increased; the noise of the bearing during operation can be reduced by improving the precision of the steel balls 3.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A double row angular contact ball bearing is characterized in that: including inner circle (2) and outer lane (1) of coaxial setting, be provided with first row of steel ball and second row of steel ball between inner circle (2) and outer lane (1), first row of steel ball and second row of steel ball all include a plurality of steel ball (3), steel ball (3) diameter is Dw, the symmetry is provided with outer lane left side channel (11) and outer lane right side channel (12) on outer lane (1), the diameter of outer lane left side channel (11) equals the diameter of outer lane right side channel (12) and is De, the symmetry is provided with inner circle left side channel (21) and inner circle right side channel (22) on inner circle (2), the diameter of inner circle left side channel (21) equals the diameter of inner circle right side channel (22) and is di, first row of steel ball cooperation is installed between outer lane left side channel (11) and inner lane left side channel (21), the cooperation of second row of steel ball is installed between outer lane right side channel (12) and inner circle right side channel (22), between outer lane left side channel (11) and left side channel (21) and right side inner lane right side channel (12) and outer lane dislocation direction setting on the axial direction.
2. The double row angular contact ball bearing according to claim 1, wherein: be provided with flange (13) in the middle of the outer lane between outer lane left side channel (11) and outer lane right side channel (12), the diameter of flange (13) in the middle of the outer lane is D2, one side that outer lane left side channel (11) are close to the bearing outside is provided with outer lane left side flange (14), the diameter of outer lane left side flange (14) is D1, one side that outer lane right side channel (12) are close to the bearing outside is provided with outer lane right side flange (15), the diameter of outer lane right side flange (15) is D3, D1= D3 to D2 is less than D1 or D3.
3. The double row angular contact ball bearing according to claim 1, wherein: be provided with flange (23) in the middle of the inner circle between inner circle left side channel (21) and inner circle right side channel (22), the diameter of flange (23) in the middle of the inner circle is d2, one side that inner circle left side channel (21) is close to the bearing outside is provided with inner circle left side flange (24), the diameter of inner circle left side flange (24) is d1, one side that inner circle right side channel (22) is close to the bearing outside is provided with inner circle right side flange (25), the diameter of inner circle right side flange (25) is d3, d1= d3 to d2 is less than d1 or d3.
4. The double row angular contact ball bearing according to claim 2, wherein: the diameter D1 of the outer ring left side rib (14) or the diameter D3 of the outer ring right side rib (15) is approximately equal to the diameter De of the outer ring left side channel (11) or the diameter De of the outer ring right side channel (12), and the diameter D2 of the inner ring middle rib (23) is approximately equal to the diameter di of the inner ring left side channel (21) or the diameter di of the inner ring right side channel (22).
5. The double row angular contact ball bearing according to claim 2, wherein: the diameter D1 of the outer ring left side rib (14) or the diameter D3 of the outer ring right side rib (15) -the diameter D2 of the outer ring middle rib (13) = (0.35-0.45) × the diameter Dw of the steel ball (3); the diameter d1 of the inner ring left side rib (24) or the diameter d3 of the inner ring right side rib (25) -the diameter d2 of the inner ring middle rib (23) = (0.35-0.45) × the diameter Dw of the steel ball (3).
6. The double row angular contact ball bearing according to claim 2, wherein: the distance between the outer ring left side rib (14) and the inner ring left side rib (24), the distance between the outer ring middle rib (13) and the inner ring middle rib (23) and the distance between the outer ring right side rib (15) and the inner ring right side rib (25) are all (0.775-0.825) multiplied by the diameter Dw of the steel ball (3).
7. The double row angular contact ball bearing according to claim 1, wherein: the nominal contact angle alpha between the first row of steel balls and the outer ring left channel (11) and the inner ring left channel (21) is 25-35 degrees, and the nominal contact angle alpha between the second row of steel balls and the outer ring right channel (12) and the inner ring right channel (22) is 25-35 degrees.
8. The double row angular contact ball bearing according to claim 1, wherein: and a pair of retainers (4) matched with the first row of steel balls and the second row of steel balls are coaxially arranged between the inner ring (2) and the outer ring (1).
9. The double row angular contact ball bearing according to claim 1, wherein: and each steel ball (3) on the first row of steel balls and the second row of steel balls reduces the surface roughness of the steel balls (3) and the spherical error of the steel balls (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210992091.6A CN115559991A (en) | 2022-08-17 | 2022-08-17 | Double-row angular contact ball bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210992091.6A CN115559991A (en) | 2022-08-17 | 2022-08-17 | Double-row angular contact ball bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115559991A true CN115559991A (en) | 2023-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210992091.6A Pending CN115559991A (en) | 2022-08-17 | 2022-08-17 | Double-row angular contact ball bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115559991A (en) |
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2022
- 2022-08-17 CN CN202210992091.6A patent/CN115559991A/en active Pending
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