CN116357676A - Solid retainer for thrust ball bearing, machining method and milling cutter for machining - Google Patents
Solid retainer for thrust ball bearing, machining method and milling cutter for machining Download PDFInfo
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- CN116357676A CN116357676A CN202310338126.9A CN202310338126A CN116357676A CN 116357676 A CN116357676 A CN 116357676A CN 202310338126 A CN202310338126 A CN 202310338126A CN 116357676 A CN116357676 A CN 116357676A
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- ball
- retainer
- locking
- inclined section
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- 238000003801 milling Methods 0.000 title claims abstract description 39
- 239000007787 solid Substances 0.000 title claims description 18
- 238000003754 machining Methods 0.000 title claims description 15
- 238000000034 method Methods 0.000 title description 12
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims description 22
- 230000007704 transition Effects 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 20
- 238000003672 processing method Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Classifications
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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
- F16C33/38—Ball cages
- F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
- F16C33/3843—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
- F16C33/385—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from metal, e.g. cast or machined window cages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
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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
- F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
- F16C19/12—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly for supporting the end face of a shaft or other member, e.g. footstep bearings
Abstract
The invention belongs to the technical field of bearing retainer processing, and in particular relates to a physical retainer for a thrust ball bearing, a processing method and a milling cutter for processing, wherein the physical retainer for the thrust ball bearing comprises a retainer annular body, ball pockets penetrating through two end faces of the retainer annular body are distributed in the circumferential direction of the retainer annular body, one end of each ball pocket is provided with a pocket bottom which is in limit fit with a spherical roller, the other end of each ball pocket is provided with an inlet, and inlets of two adjacent ball pockets are respectively close to different end faces of the retainer annular body; the ball pocket is characterized in that an inclined guide ball loading port is formed in the pocket opening of the ball pocket, and a convex ball locking table for locking the spherical roller is arranged on one side of the guide ball loading port, which is close to the pocket bottom. By adopting the milling method, the ball locking table can be processed in the ball pocket hole of the retainer through the milling cutter, so that the position and the precision of the locking amount can be effectively controlled, the ball pocket Kong Zisuo of the retainer can be ensured, the ball can be locked by manual force when the bearing is sleeved, time and labor are saved, and the bearing sleeve-sleeving efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of bearing retainer processing, and particularly relates to a physical retainer for a thrust ball bearing, a processing method and a milling cutter for processing.
Background
At present, the technology of locking rollers of a thrust ball bearing retainer is always a bottleneck technology of accessory processing in the bearing field. At present, the processing of the bearing retainer at home and abroad is to impress the cylindrical hole surface of the retainer when the bearing is assembled, so that the side wall of the pocket hole forms a bulge for locking the ball. Moreover, the thrust bearing retainer must be a double-sided bore, and two positioning and embossing lock balls are required during bearing assembly. The ball locking mode not only increases the processing procedures and causes the processing cost to be increased, but also more importantly directly damages the original pocket processing precision of the retainer, and the problems of ball falling, ball clamping, ball blocking, retainer slag falling, ball scratch and the like often occur during assembly. Meanwhile, the positions of the locking balls are not uniform due to point locking, the locking amount is not uniform, and the concentricity difference of the holes on the two sides is caused. The problems directly affect the rotation precision of the bearing and the dynamic balance of the bearing. In order to ensure the machining precision of the thrust ball bearing retainer, the invention provides a retainer structure with a lock ball function, a machining method and a cutter thereof, which are directly machined by adopting a new machining mode.
Disclosure of Invention
According to the defects of the prior art, the invention aims to provide a linear self-locking ball structure of a retainer for a thrust ball bearing, namely, a linear ball locking table locking ball is directly processed through a milling cutter during retainer ball pocket processing, so that the problems of ball falling, ball clamping, ball blocking, retainer slag falling, ball scratch and the like frequently occur during bearing assembly are solved, the dimensional accuracy and the position degree of the locking ball are improved, and the rotation accuracy of the bearing and the dynamic balance of the bearing are improved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the solid retainer for the thrust ball bearing comprises a retainer annular body, wherein ball pockets penetrating through two end faces of the retainer annular body are distributed in the circumferential direction of the retainer annular body, one end of each ball pocket is provided with a pocket bottom in limit fit with a spherical roller, the other end of each ball pocket is provided with an inlet, and the inlets of two adjacent ball pockets are respectively close to different end faces of the retainer annular body; the ball pocket is characterized in that an inclined guide ball loading port is formed in the pocket opening of the ball pocket, and a convex ball locking table for locking the spherical roller is arranged on one side of the guide ball loading port, which is close to the pocket bottom.
Further, one side of the ball locking table far away from the guide ball loading port is sequentially provided with an arc transition table and a serial momentum table, and the serial momentum table is connected with the pocket bottom; the ball loading port, the ball locking platform, the arc transition platform, the serial momentum platform and the pocket bottom are sequentially connected and form the surface of the ball pocket along the annular structure, and the inflection points of the ball pocket are smoothly transited.
Further, the serial momentum platform is a straight platform; the self-locking amount of the ball locking table is smaller than the diameter of the spherical roller, and the ball locking table is in line contact with the spherical roller.
Further, the axial width of the serial quantity platform is 0.5mm, the self-locking quantity of the ball locking platform is smaller than the diameter size of the spherical roller by 0.05-0.08 mm, and the axial width of the ball locking platform is 1mm.
Further, the guide ball loading port is inclined in a direction far away from the central axis of the ball pocket hole, a flaring structure is formed, and the inclination angle of the guide ball loading port is 3 degrees; the bottom of the pocket is of a tapered structure with gradually shrinking openings.
The thrust ball bearing solid retainer is formed by one-step forming two forming milling cutters, and simultaneously, the guide ball loading port, the ball locking table, the arc transition table, the serial momentum table and the pocket bottom are formed on the surfaces of two rows of ball pockets with opposite pocket positions.
The milling cutter for machining the thrust ball bearing solid retainer comprises a cutter bar, wherein the outer peripheral surface of the end part of the cutter bar is provided with at least one cutting edge part and a chip removal groove matched with the cutting edge part, the cutting edge part comprises a front cutter surface, a rear cutter surface and a combined cutting edge formed by intersecting the front cutter surface and the rear cutter surface, and the edge-shaped curve of the combined cutting edge comprises an inlet inclined section, a concave section, an arc section, a straight line section and a pocket bottom inclined section which are sequentially arranged.
Further, the inclination directions of the inlet inclined section and the pocket bottom inclined section are the same, and the inlet inclined section and the pocket bottom inclined section incline to one side close to the central axis of the cutter bar along the direction from the inlet inclined section to the pocket bottom inclined section, so that a gradually contracted structure is formed; the inclination angle of the inlet inclined section relative to the central axis of the cutter bar is 3 degrees; one end of the pocket inlet inclined section and one end of the pocket bottom inclined section, which are far away from each other, are respectively provided with an inward concave arc blade; the axial width of the concave section is 1mm, and the axial width of the straight line section is 0.5mm.
Further, three blade parts are uniformly distributed along the circumferential direction, and the chip removal groove is arranged between two adjacent blade parts; the chip removal groove is a V-shaped groove, and the front cutter surface is a side wall surface of the chip removal groove; the combined cutting edge is arranged along the axial direction of the cutter bar; the pocket inclined section is formed on a conical surface on the rear cutter surface, and the concave section is formed on a cylindrical surface on the rear cutter surface; the arc section is formed on a drum-shaped surface on the rear cutter surface; the straight line segment is formed on a cylindrical surface on the rear cutter surface; the pocket bottom inclined section is formed on a conical surface on the rear cutter surface; the corner of the inflection point is smoothly transited between the pocket mouth inclined section, the concave section, the circular arc section, the straight line section and the pocket bottom inclined section.
Further, the number of the milling cutters is two, and the milling cutters are respectively used for processing two rows of retainer ball pockets on two end surfaces of the retainer; the first milling cutter is provided with a middle pocket inlet inclined section close to the cutter bar and a pocket bottom inclined section far away from the cutter bar; the inclined section of the pocket bottom in the second milling cutter is arranged near the cutter bar, and the inclined section of the pocket inlet is arranged far away from the cutter bar.
The beneficial effects of the invention are as follows: the invention provides a solid retainer for a thrust ball bearing, which comprises a retainer annular body, wherein ball pockets penetrating through two end faces of the retainer annular body are distributed in the circumferential direction of the retainer annular body, one end of each ball pocket is provided with a pocket bottom in limit fit with a spherical roller, the other end of each ball pocket is provided with an inlet, and the inlets of two adjacent ball pockets are respectively close to different end faces of the retainer annular body; the ball pocket is characterized in that an inclined guide ball loading port is formed in the pocket opening of the ball pocket, and a convex ball locking table for locking the spherical roller is arranged on one side of the guide ball loading port, which is close to the pocket bottom. The retainer is processed in the ball pocket hole to lock the ball table, so that the position and the precision of the locking quantity can be effectively controlled, the ball pocket Kong Zisuo of the retainer is ensured, the ball can be locked by manual force when the bearing is sleeved, time and labor are saved, and the bearing sleeve-sleeving efficiency is improved.
Drawings
FIG. 1 is a schematic view of a physical retainer for a thrust ball bearing according to the present invention;
FIG. 2 is a view A-A of FIG. 1;
FIG. 3 is a rotational enlarged view at I of FIG. 2;
FIG. 4 is a perspective view showing the structure of a solid cage for a thrust ball bearing according to the present invention;
FIG. 5 is an enlarged view of FIG. 4 at B;
FIG. 6 is a schematic view of the structure of a first milling cutter;
FIG. 7 is a perspective view of the structure of the first milling cutter;
fig. 8 is a dimensional view of a first milling cutter (double-edged);
FIG. 9 is a schematic view of a second milling cutter;
FIG. 10 is a perspective view of the structure of the second milling cutter;
FIG. 11 is a dimensional view of a second hand milling cutter (double-edged);
in the figure: 1. the retainer ring-shaped body 2, the ball pocket hole 3, the guide ball loading port 4, the ball locking table 5, the arc transition table 6, the serial momentum table 7, the pocket bottom 8, the cutter bar 9 and the chip removing groove, 10, a front cutter surface, 11, a rear cutter surface, 12, an inlet inclined section, 13, a concave section, 14, an arc section, 15, a straight line section, 16, a pocket bottom inclined section, 17 and a concave arc blade.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
Referring to fig. 1-5, a solid retainer for a thrust ball bearing comprises a retainer annular body 1, wherein ball pockets 2 penetrating through two end faces of the retainer annular body 1 are distributed on the retainer annular body 1 in the circumferential direction, one end of each ball pocket 2 is provided with a pocket bottom 7 which is in limit fit with a spherical roller, the other end is provided with an inlet, and inlets of two adjacent ball pockets are respectively close to different end faces of the retainer annular body 1; the ball pocket is characterized in that the pocket mouth of the ball pocket hole 2 is provided with an inclined guide ball loading mouth 3, the other side of the guide ball loading mouth 3 is sequentially provided with a locking ball table 4, an arc transition table 5 and a serial momentum table 6, the serial momentum table 6 is connected with a pocket bottom 7, and the pocket bottom 7 is of a gradually shrinking conical structure.
Based on the technical scheme, the ball loading position of the outer diameter of the retainer is designed to form the guide ball loading port 3 with an angle of half angle 3 degrees, so that the integral strength of the retainer is not affected, the spherical roller is loaded according to the guide ball loading port, and the spherical roller is not easy to scratch, convenient and quick.
Further, the guide ball loading port 3, the ball locking table 4, the arc transition table 5, the serial momentum table 6 and the pocket bottom 7 are sequentially connected and form the surface of the ball pocket hole along the annular structure. The corner of the inflection point which is connected among the guide ball loading port 3, the ball locking table 4, the arc transition table 5, the serial momentum table 6 and the pocket bottom 7 is smoothly transited (namely, rounded), so that the spherical roller is not scratched when being loaded into the ball pocket hole, and the spherical roller is not contacted with the pocket hole of the retainer after being loaded into the ball pocket hole, so that the spherical roller has omnibearing degree of freedom in the locking port, and the rotation precision of the bearing and the dynamic balance of the bearing are improved.
Further, the serial momentum platform 6 is a straight platform, a cylindrical surface is formed in the ball pocket 2, and the axial width of the serial momentum platform 6 is 0.5mm.
Based on the above technical scheme, it should be noted that, the serial momentum stage 6 is for giving 0.5mm serial momentum value when designing the ball locking port position, guarantee that serial momentum is moderate, adopt the circular arc transition platform 5 that the ball pocket formed to connect between the face of cylinder of serial momentum stage 6 and the ball locking stage 4 position, make the junction form smooth connection. The ball is not clamped and blocked during bearing assembly, and the noise of the bearing is not too large due to too large amount of serial momentum, so that the rotation precision of the bearing and the dynamic balance of the bearing are improved.
Further, the self-locking amount of the ball locking table 4 is smaller than the diameter size of the spherical roller by 0.05-0.08 mm, the width of the ball locking table 4 is 1mm, and an outwards convex cylindrical surface is formed in the ball pocket 2. The ball locking table 4 is in line contact with the ball roller.
Based on the above technical scheme, it should be noted that, the ball locking table 4 is a ball roller that enters the guide ball loading port 3 of the retainer, is pressed manually and lightly, enters the ball pocket by elastic deformation of the retainer, and does not fall out of the ball pocket. The design self-locking quantity is smaller than the diameter size of the spherical roller by 0.05-0.08 mm, the width is 1mm, the ball is not dropped, clamped and scratched when the bearing is assembled, and the spherical roller is easily installed. The size precision and the position precision of the lock ball are improved; and the rotation precision of the bearing and the dynamic balance of the bearing are improved.
Further, the guide ball loading port 3 is inclined in a direction far away from the central axis of the ball pocket, a flaring structure is formed, and the inclination angle of the guide ball loading port 3 is 3 degrees.
The contact surface of the retainer ball pocket 2 and the spherical roller is changed from the original point locking roller to the line locking roller, and the point contact is changed to the line contact, so that the function of stabilizing the concentric rotation of the guide roller along the axial direction is realized. And the rotation precision of the bearing is improved. In addition, the contact strength of the external light is high, the abrasion is not easy, and the processing is convenient.
The ball locking table 4 is in arc transition, the spherical rollers are easy to enter and difficult to fall out, ball loading speed of the locking balls is easy to be improved, and ball falling-preventing precision and quality required by customers are ensured. The linear boss of the lock ball is smooth and burr-free, so that the problem of manual burr removal is solved, and the technical difficulty that the lock point of the point lock is sharp to scratch the rolling body is also solved. The consistency and reliability of the locking ball positions of the locking ball length of the linear locking ball boss. The size precision and the position degree of the lock balls are improved, and the rotation precision of the bearing and the dynamic balance of the bearing are improved.
The retainer structure of the invention has the following characteristics: 1. the ball locking opening size and the ball locking opening position size are designed in the retainer pocket hole, and the special forming cutter is adopted to mill the pocket hole in the machining center, so that the steel balls are ensured to be pressed into the retainer ball pocket hole by hands and not to fall out from the ball pocket hole. 2. Two cutters are adopted to process two-sided holes in one positioning, the concentricity of the two-sided pockets of the retainer can reach 0.03-0.08, and the concentricity of the two-sided pockets in two positioning processes can only reach 0.15-0.3. 3. The size of the locking point is controlled, and the string momentum of the steel ball in the ball pocket of the retainer is ensured.
Compared with the old structure, the utility model has the advantages: firstly, on the machining center, two forming cutters are adopted to mill holes, the size and the position of a locking notch can be controlled according to the process requirements, and the batch quality stability is reliable. Secondly, the appearance quality of the retainer is good, and the appearance of the retainer is not damaged secondarily. Thirdly, the retainer pocket Kong Zisuo can lock the ball by manual force when the bearing is sleeved, so that time and labor are saved, and the bearing sleeve efficiency is improved.
In order to process the ball pocket structure of the retainer, as described with reference to fig. 7-10, the invention provides a milling cutter for processing a thrust ball bearing solid retainer, which comprises two milling cutters symmetrically provided with cutting edge portions, wherein the two milling cutters comprise cutter bars 8, at least one cutting edge portion and chip removal grooves 9 matched with the cutting edge portions are arranged on the peripheral surface of the end portion of each cutter bar 8, specifically, three cutting edge portions are uniformly distributed circumferentially, and chip removal grooves 10 are arranged between every two adjacent cutting edge portions. The structure is more reasonable, the strength is high, and the processing precision is high.
The blade part is wholly concave on the peripheral surface of the cutter bar. Specifically, the blade portion includes a rake surface 10, a flank surface 11, and a combined cutting edge formed by intersecting the rake surface 10 and the flank surface 11.
Wherein the blade-shaped curve of the combined cutting edge of the first milling cutter comprises an inlet inclined section 12, a concave section 13, a circular arc section 14, a straight line section 15 and a pocket bottom inclined section 16 which are sequentially arranged; the inlet inclined section 12 is disposed adjacent to the cutter bar 8, and the pocket bottom inclined section 16 is disposed away from the cutter bar 8.
Wherein the blade-shaped curve of the combined cutting edge of the second milling cutter comprises an inlet inclined section 12, a concave section 13, a circular arc section 14, a straight line section 15 and a pocket bottom inclined section 16 which are sequentially arranged; the pocket bottom inclined section 16 is disposed adjacent to the cutter bar 8, and the pocket inlet inclined section 12 is disposed away from the cutter bar 8.
The blade structures and the sizes of all parts of the two milling cutters are completely consistent, a mode of clamping the retainer workpieces once is adopted during machining, the two milling cutters are machined together, machining of two rows of retainer pockets is completed once, and the two rows of linear ball locking tables ensure that concentricity of the two rows of holes is not different.
Further, the inlet inclined section 12 and the pocket inclined section 16 are inclined in the same direction. The inlet inclined section 12 and the pocket bottom inclined section 16 incline to one side close to the central axis of the cutter bar along the direction from the inlet inclined section 12 to the pocket bottom inclined section 16, so as to form a gradually contracted structure; the inlet inclined section 12 is inclined at an angle of 3 deg. with respect to the central axis of the cutter bar.
Further, the inlet inclined section 12 and the pocket bottom inclined section 16 are each provided with an inward concave circular arc edge 17 at the ends thereof remote from each other. The edge of the concave arc edge 17 is excessively formed into an R0.5mm arc, and is inclined by 60 degrees relative to the central axis of the cutter bar, so that burrs on the periphery of the ball pocket are automatically removed, and a burr-free processing state is realized.
Further, the axial width of the concave section 13 is 1mm, and the axial width of the straight section 15 is 0.5mm.
In order to facilitate chip removal, the chip removal groove 9 in this embodiment is a V-shaped groove, and the rake surface 10 is a side wall surface of the chip removal groove 9.
Further, the combined cutting edge is arranged in the axial direction of the holder 8.
Further, the inlet inclined section 12 is formed on a tapered surface of the relief surface 11, and the concave section 13 is formed on a cylindrical surface of the relief surface 11; the arc section 14 is formed on a drum-shaped surface of the flank 11; the straight line section 15 is formed on a cylindrical surface of the flank 11; the pocket bottom inclined section 16 is formed on a conical surface of the rear cutter surface 11; the corner of the inflection point, which is connected with the inlet inclined section 12, the concave section 13, the circular arc section 14, the straight line section 15 and the pocket bottom inclined section 16, is transited according to a round angle of R0.5mmr. And the burrs around the holes are automatically removed, so that the processing state without burrs is realized.
The concave section 13 with the width of 1mm in the milling cutter forms a ball locking table 4 of the ball pocket hole of the retainer, the ball locking table is used for leading the steel ball to enter the ball loading port of the retainer, the steel ball is pressed manually and slightly, and the steel ball enters the ball pocket hole by elastic deformation of the retainer and does not fall out of the ball pocket hole. The design self-locking quantity is smaller than the diameter of the steel ball by 0.05-0.08 mm and the width of the steel ball by 1mm, so that the steel ball can be easily installed without falling off the ball, clamping the ball, and scraping the ball by the retainer during bearing assembly. The size precision and the position precision of the lock ball are improved; and the rotation precision of the bearing and the dynamic balance of the bearing are improved. The ball locking table 4 is in line contact with the ball roller. The consistency and reliability of the locking ball positions of the locking ball length of the linear locking ball boss. The size precision and the position degree of the lock balls are improved, and the rotation precision of the bearing and the dynamic balance of the bearing are improved. The ball locking table 4 is linear convex and is arc-shaped excessively, the spherical roller is easy to enter and difficult to fall out, ball loading speed of the locking ball is ensured to be easily improved, and ball falling-preventing precision quality required by customers is ensured. The linear boss of the lock ball is smooth and burr-free, so that the problem of manual burr removal is solved, and the technical difficulty that the lock point of the point lock is sharp to scratch the rolling body is also solved.
The arc section 14 in the milling cutter forms an arc transition table 5 of the retainer ball pocket hole, the size of the arc transition table is matched with that of the spherical roller, and the rotation precision of the spherical roller is ensured.
The straight line section 15 in the milling cutter forms a serial momentum platform 6 of the ball pocket hole of the retainer, the serial momentum platform 6 is used for giving serial momentum value of 0.5mm when the ball locking port position is designed, moderate serial momentum is ensured, the cylindrical surface of the serial momentum platform 6 is connected with the arc transition platform 5 formed by the ball pocket between the ball locking platform 4 positions, and the connection part is formed to be smooth. The ball is not clamped and blocked during bearing assembly, and the noise of the bearing is not too large due to too large amount of serial momentum, so that the rotation precision of the bearing and the dynamic balance of the bearing are improved.
The pocket bottom inclined section 16 of the milling cutter forms a pocket bottom 7 of the retainer ball pocket hole, and is matched with the spherical roller for limiting.
The round and smooth transition connection forming cutter is designed, the corner with the inflection point of the cutter is in transition according to the R0.5mm round angle, so that the shape of the ball pocket of the retainer is round and smooth connection, the ball is not scratched when being arranged in the ball pocket, and the ball is arranged in the ball pocket of the retainer without corner contact, so that the ball has omnibearing freedom degree in a locking notch, and the rotation precision of the bearing and the dynamic balance of the bearing are improved. In addition, the designed forming cutter is excessively processed into R0.5 arc when Kong Zhoubian, and burrs around the hole are automatically removed, so that the processing is in a burr-free state.
The retainer structure and the special forming milling cutter designed by the invention have simple structure, can process each structure on the side surfaces of the two rows of ball pockets at one time, have high processing precision and processing efficiency, and can ensure the smooth processing of the thrust ball bearing entity retainer. It has the following characteristics: 1. the ball locking opening size and the ball locking opening position size are designed in the retainer pocket hole, and the special forming cutter is adopted to mill the pocket hole in the machining center, so that the steel balls are ensured to be pressed into the retainer ball pocket hole by hands and not to fall out from the ball pocket hole. 2. Two cutters are adopted to process two-sided holes in one positioning, the concentricity of the two-sided pockets of the retainer can reach 0.03-0.08, and the concentricity of the two-sided pockets in two positioning processes can only reach 0.15-0.3. 3. The size of the locking point is controlled, and the string momentum of the steel ball in the ball pocket of the retainer is ensured.
Compared with the old structure, the utility model has the advantages: firstly, on the machining center, two forming cutters are adopted to mill holes, the size and the position of a locking notch can be controlled according to the process requirements, and the batch quality stability is reliable. Secondly, the appearance quality of the retainer is good, and the appearance of the retainer is not damaged secondarily. Thirdly, the retainer pocket Kong Zisuo can lock the ball by manual force when the bearing is sleeved, so that time and labor are saved, and the bearing sleeve efficiency is improved.
It should be noted that the detailed portions of the present invention are not described in the prior art.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on 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," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The foregoing list is only the preferred embodiments of the present invention. Obviously, the invention is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present invention.
Claims (10)
1. The thrust ball is entity holder for bearing, its characterized in that: the retainer comprises a retainer annular body, wherein ball pockets penetrating through two end faces of the retainer annular body are distributed in the circumferential direction of the retainer annular body, one end of each ball pocket is provided with a pocket bottom in limit fit with a spherical roller, the other end of each ball pocket is provided with an inlet, and the inlets of two adjacent ball pockets are respectively close to different end faces of the retainer annular body; the ball pocket is characterized in that an inclined guide ball loading port is formed in the pocket opening of the ball pocket, and a convex ball locking table for locking the spherical roller is arranged on one side of the guide ball loading port, which is close to the pocket bottom.
2. The solid cage for thrust ball bearings according to claim 1, wherein: the side of the ball locking table, which is far away from the guide ball loading port, is sequentially provided with an arc transition table and a serial momentum table, and the serial momentum table is connected with the bottom of the pocket; the ball loading port, the ball locking platform, the arc transition platform, the serial momentum platform and the pocket bottom are sequentially connected and form the surface of the ball pocket along the annular structure, and the inflection points of the ball pocket are smoothly transited.
3. The solid cage for thrust ball bearings according to claim 2, wherein: the serial momentum platform is a straight platform; the self-locking amount of the ball locking table is smaller than the diameter of the spherical roller, and the ball locking table is in line contact with the spherical roller.
4. A solid cage for thrust ball bearings according to claim 3, characterized in that: the axial width of the serial momentum platform is 0.5mm, the self-locking amount of the ball locking platform is smaller than the diameter size of the spherical roller by 0.05-0.08 mm, and the axial width of the ball locking platform is 1mm.
5. The solid cage for thrust ball bearings according to claim 1, wherein: the guide ball loading port is inclined towards a direction far away from the central axis of the ball pocket hole, a flaring structure is formed, and the inclination angle of the guide ball loading port is 3 degrees; the bottom of the pocket is of a tapered structure with gradually shrinking openings.
6. A method of manufacturing a thrust ball bearing solid cage according to any one of claims 1-5, characterized in that: the ball pocket is formed by two forming milling cutters at one time, and the guide ball loading mouth, the ball locking table, the arc transition table, the serial momentum table and the pocket bottom on the surfaces of two rows of ball pockets with opposite positions of the pockets are processed.
7. Milling cutter for machining a thrust ball bearing solid cage according to any one of claims 1 to 5, characterized in that: the cutting tool comprises a tool bar, at least one cutting edge part and a chip groove matched with the cutting edge part are arranged on the outer peripheral surface of the end part of the tool bar, the cutting edge part comprises a front tool face, a rear tool face and a combined cutting edge formed by intersecting the front tool face and the rear tool face, and the edge-shaped curve of the combined cutting edge comprises an inlet inclined section, a concave section, a circular arc section, a straight line section and a pocket bottom inclined section which are sequentially arranged.
8. The milling cutter for machining a thrust ball bearing solid cage according to claim 7, wherein: the inclined directions of the inlet inclined section and the bottom inclined section are the same, and the inlet inclined section and the bottom inclined section incline to one side close to the central axis of the cutter bar along the direction from the inlet inclined section to the bottom inclined section, so that a gradually contracted structure is formed; the inclination angle of the inlet inclined section relative to the central axis of the cutter bar is 3 degrees; one end of the pocket inlet inclined section and one end of the pocket bottom inclined section, which are far away from each other, are respectively provided with an inward concave arc blade; the axial width of the concave section is 1mm, and the axial width of the straight line section is 0.5mm.
9. The milling cutter for machining a thrust ball bearing solid cage according to claim 7, wherein: three blade parts are uniformly distributed along the circumferential direction, and the chip removal groove is arranged between every two adjacent blade parts; the chip removal groove is a V-shaped groove, and the front cutter surface is a side wall surface of the chip removal groove; the combined cutting edge is arranged along the axial direction of the cutter bar; the pocket inclined section is formed on a conical surface on the rear cutter surface, and the concave section is formed on a cylindrical surface on the rear cutter surface; the arc section is formed on a drum-shaped surface on the rear cutter surface; the straight line segment is formed on a cylindrical surface on the rear cutter surface; the pocket bottom inclined section is formed on a conical surface on the rear cutter surface; the corner of the inflection point is smoothly transited between the pocket mouth inclined section, the concave section, the circular arc section, the straight line section and the pocket bottom inclined section.
10. The milling cutter for machining a thrust ball bearing solid cage according to claim 7, wherein: the milling cutter is used for machining two rows of retainer ball pockets on two end faces of the retainer respectively; the first milling cutter is provided with a middle pocket inlet inclined section close to the cutter bar and a pocket bottom inclined section far away from the cutter bar; the inclined section of the pocket bottom in the second milling cutter is arranged near the cutter bar, and the inclined section of the pocket inlet is arranged far away from the cutter bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310338126.9A CN116357676A (en) | 2023-03-31 | 2023-03-31 | Solid retainer for thrust ball bearing, machining method and milling cutter for machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310338126.9A CN116357676A (en) | 2023-03-31 | 2023-03-31 | Solid retainer for thrust ball bearing, machining method and milling cutter for machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116357676A true CN116357676A (en) | 2023-06-30 |
Family
ID=86930811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310338126.9A Pending CN116357676A (en) | 2023-03-31 | 2023-03-31 | Solid retainer for thrust ball bearing, machining method and milling cutter for machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116357676A (en) |
-
2023
- 2023-03-31 CN CN202310338126.9A patent/CN116357676A/en active Pending
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