Long-life bearing cage

Abstract

The utility model relates to the technical field of bearing retainer, specifically relates to a long life bearing retainer, including annular frame one and annular frame two, the equal interval multiple fixed blocks of fixed have on annular frame one and annular frame two, and the annular frame one and annular frame two between adjacent fixed blocks are reserved with the roller mouth, and the cylindrical roller is placed in the roller mouth, and the both ends of cylindrical roller reach the annular frame one and annular frame two of corresponding position, and the fixed block middle position is equipped with the roller mouth, and the roller is placed in the roller mouth, and the both ends of roller reach the annular frame one and annular frame two of corresponding position, and the roller and cylindrical roller surface rolling contact, the utility model discloses a roller is set up, and the roller and cylindrical roller rolling contact, limit the cooperation clearance of cylindrical roller and retainer, weaken the vibration of retainer, thereby protect the retainer, prolong the life.

Description

Technical Field

[0001] This utility model relates to the field of bearing cage technology, and more specifically to long-life bearing cages. Background Technology

[0002] The bearing cage is one of the core components of a rolling bearing. Its function is to isolate and guide the rolling elements (rollers / needle rollers) to maintain a uniform pitch, ensuring stable operation of the bearing under high-speed, heavy-load, or complex conditions. Cage failure can be caused by various factors, such as stress concentration, vibration fatigue, and material defects.

[0003] Vibration fatigue is caused by high-frequency vibrations resulting from the periodic collisions between the cage and the rolling elements. For example, the collision frequency of a 6000rpm bearing reaches 500Hz, which eventually leads to cage fatigue and a decrease in material toughness. In addition, if there are many pores in the cage material, it will break directly. Since the cage and the rolling elements need to fit together, vibration fatigue is almost unavoidable in high-frequency bearings. Utility Model Content

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0005] A long-life bearing cage includes a first ring cage and a second ring cage. Multiple fixing blocks at equal intervals are fixed on the first ring cage and the second ring cage. Roller openings are reserved between adjacent fixing blocks on the first ring cage and the second ring cage. Cylindrical rollers are placed in the roller openings. The two ends of the cylindrical rollers abut against the corresponding positions of the first ring cage and the second ring cage. A roller opening is opened in the middle of the fixing block. A roller is placed in the roller opening. The two ends of the roller abut against the corresponding positions of the first ring cage and the second ring cage. The rollers make rolling contact with the surfaces of the cylindrical rollers.

[0006] Furthermore, the fixing block has an opening corresponding to the roller's bevel position, allowing the roller to roll in contact with the cylindrical roller surface at the opening. The side of the fixing block at the roller's bevel position has an arc-shaped structure that matches the cylindrical roller surface. The opening facilitates contact between the roller and the cylindrical roller, and the limited opening at the corresponding roller's bevel position does not affect the stable installation of the roller.

[0007] Furthermore, a fixing bracket is installed on the outer side of the second annular frame corresponding to the roller position, and a fixing strip is installed on the outer side of the first annular frame corresponding to the fixing bracket position. The fixing strip is fixed to the fixing bracket at the corresponding position. The fixing bracket and the fixing strip cooperate to form a complete and stable overall structure of the retainer.

[0008] Furthermore, both the first and second annular frames have through holes at the center positions of the roller openings, and the fixing frames and fixing bars have protruding posts fixed at the corresponding through hole positions. The protruding posts on the fixing frames and fixing bars abut against the through holes of the second and first annular frames at the corresponding positions to form supports. The through holes and protruding posts cooperate to restrict the position of the fixing frames and prevent them from moving arbitrarily.

[0009] Furthermore, the fixing frame has a U-shaped cross-section, and a pin is fixed to the end of the fixing frame facing the fixing bar. A fixing hole is opened on the fixing bar corresponding to the position of the pin, and the pin passes through the fixing hole at the corresponding position. The pin fixing is simple and reliable.

[0010] Furthermore, both the inner and outer sides of the annular frame two at the roller opening position and the annular frame one at the roller opening position are open. The distance between the inner openings of the annular frame two and the annular frame one at the roller opening position is 'a', and the distance between the outer openings of the annular frame two and the annular frame one at the roller opening position is 'b', where 'a' < 'b'. The inner opening is smaller than the outer opening, which can prevent the cylindrical roller from falling out of the inner opening.

[0011] Furthermore, the fixing block has multiple equally spaced notches corresponding to the inner peripheral wall of the roller opening, and the fixing block at the center of the roller opening has an arc-shaped groove concentric with the corresponding annular frame one and annular frame two. The notches and grooves cooperate to facilitate the entry of bearing lubricating grease into the rolling position between the roller and the fixing block for lubrication.

[0012] Furthermore, multiple spherical protrusions at equal intervals are fixed at the bottom of the roller corresponding to the outer position of the through hole, and the two ends of the roller abut against the spherical protrusions at the corresponding positions. The spherical protrusions help reduce the frictional resistance between the two ends of the roller and the fixed block.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This utility model incorporates rollers that roll in contact with cylindrical rollers. When the cylindrical rollers rotate, they drive the rollers to rotate, and the rollers, in turn, drive the cylindrical rollers to rotate. These components work together to form a rotating whole, which helps to distribute the force on the cylindrical rollers. At the same time, the contact between the rollers and the cylindrical rollers limits the clearance between the cylindrical rollers and the cage, reducing the vibration of the cage and thus protecting the cage and extending its service life.

[0015] 2. The notches and grooves at the roller positions in this utility model are beneficial for the bearing lubricant to lubricate the roller rotation. At the same time, the contact between the roller and the cylindrical roller facilitates the transfer of lubricant on the roller to the cylindrical roller, ensuring sufficient lubrication to reduce friction and thus ensuring smooth rotation of the cylindrical roller. It also helps to extend the service life of the cage.

[0016] 3. In this utility model, by setting spherical protrusions to contact the two ends of the roller, the spherical structure can reduce the frictional resistance with the roller, and with the setting of notches and grooves, the smooth rotation of the roller is comprehensively ensured.

[0017] 4. In this utility model, the first ring frame and the second ring frame are fixed together by a fixing bracket and a fixing strip. Before installation, the retainer is in a separate state, which facilitates the installation of the cylindrical roller and the installation of the retainer and the bearing. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is an exploded view of this utility model;

[0020] Figure 3 This is a perspective view of the ring frame one in this utility model;

[0021] Figure 4 This is an enlarged view of point A in this utility model;

[0022] Figure 5 This is an enlarged view of point B in this utility model;

[0023] Figure 6 This is a perspective view of the fixing frame and fixing strip in this utility model;

[0024] Figure 7 This is a schematic diagram of the cylindrical roller configuration in this utility model.

[0025] Reference numerals in the attached drawings: 1. Ring frame one; 2. Ring frame two; 3. Fixing block; 4. Roller opening; 5. Through opening; 6. Through hole; 7. Notch; 8. Groove; 9. Spherical protrusion; 10. Roller opening; 11. Arc surface; 12. Roller; 13. Fixing frame; 14. Fixing strip; 15. Protrusion; 16. Pin; 17. Fixing hole; 18. Cylindrical roller. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0027] This application provides a long-life bearing cage, mainly addressing the problem that existing bearing cages require a clearance between the cage and the rolling elements, which causes high-frequency vibration of the cage and ultimately shortens its lifespan. The following technical solution is provided, which will be discussed in conjunction with... Figures 1-7 Please provide a detailed explanation:

[0028] The long-life bearing cage includes a ring cage 1 and a ring cage 2. Multiple fixing blocks 3 are fixed on the ring cage 1 and the ring cage 2 at equal intervals. Roller openings 10 are reserved on the ring cage 1 and the ring cage 2 between adjacent fixing blocks 3. A cylindrical roller 18 is placed in the roller opening 10. The two ends of the cylindrical roller 18 abut against the corresponding positions of the ring cage 1 and the ring cage 2. The side of the fixing block 3 at the position of the roller opening 10 is set with an arc surface 11 that matches the surface of the cylindrical roller 18.

[0029] A roller opening 4 is provided in the middle of the fixing block 3. A roller 12 is placed in the roller opening 4. The length of the roller 12 is less than the length of the cylindrical roller 18. The two ends of the roller 12 abut against the corresponding positions of the annular frame 1 and the annular frame 2. A through opening 5 is provided on the fixing block 3 at the position corresponding to the roller opening 10. The roller 12 at the through opening 5 makes rolling contact with the surface of the cylindrical roller 18. A fixing frame 13 is installed on the outer side of the annular frame 2 at the position corresponding to the roller 12. A fixing strip 14 is installed on the outer side of the annular frame 1 at the position corresponding to the fixing frame 13. The fixing strip 14 is fixed to the fixing frame 13 at the corresponding position.

[0030] When the cylindrical rollers 18 rotate, they are driven to rotate by contact and friction with the rollers 12. The rotation of the rollers 12 in turn drives the rotation of the adjacent cylindrical rollers 18. In addition, the cylindrical rollers 18 rotate by friction with the inner ring of the bearing, so that all the cylindrical rollers 18 can not only move together along the inner ring of the bearing, but also move together by the rollers 12. The rollers 12 are conducive to the rotational stability and synchronization of all the cylindrical rollers 18, thereby reducing the tensile and destructive force on the cage under the unbalanced force of the cylindrical rollers 18. At the same time, the contact between the rollers 12 and the cylindrical rollers 18 is not affected by the fit clearance between the ring cage 1 and the ring cage 2 and the cylindrical rollers 18. The vibration frequency of the cage formed by the ring cage 1 and the ring cage 2 is reduced, thereby extending the service life of the cage.

[0031] In some embodiments, through holes 6 are provided on the annular frame 1 and the annular frame 2 at the center position of the roller opening 4, and protrusions 15 are fixed on the fixed frame 13 and the fixed strip 14 at the positions corresponding to the through holes 6. The protrusions 15 on the fixed frame 13 and the fixed strip 14 abut against the through holes 6 of the annular frame 2 and the annular frame 1 at the corresponding positions to form a support.

[0032] The fixing bracket 13 and the fixing strip 14 work together to fix the second ring bracket 2 and the first ring bracket 1. At the same time, the cooperation between the protruding post 15 and the through hole 6 restricts the position of the fixing bracket 13 and the fixing strip 14 on the second ring bracket 2 and the first ring bracket 1, preventing them from sliding at will.

[0033] In some embodiments, the cross-section of the fixing frame 13 is U-shaped, and a pin 16 is fixed to the end of the fixing frame 13 facing the fixing strip 14. A fixing hole 17 is provided on the fixing strip 14 corresponding to the position of the pin 16, and the pin 16 passes through the fixing hole 17 at the corresponding position.

[0034] The pin 16 engages with the fixing hole 17, dividing the cage into multiple parts instead of a single unit. This facilitates the use and installation of the cage, as well as the installation of the roller 12.

[0035] In some embodiments, the inner and outer sides of the annular frame 2 and the annular frame 1 at the roller opening 4 are both open, the distance between the inner openings of the annular frame 2 and the annular frame 1 at the roller opening 4 is a, and the distance between the outer openings of the annular frame 2 and the annular frame 1 at the roller opening 4 is b, where a < b.

[0036] The inner opening faces the inner ring of the bearing. Considering the assembly of the bearing, the inner ring of the roller bearing is generally not provided with a groove for the mating roller. In order to prevent the cylindrical roller 18 from falling out through the inner opening during installation, the inner opening is set to be small. When installing the cylindrical roller 18, the mating installation is carried out from the outer opening first. After the arc surface 11 is mated with the cylindrical roller 18, the ring cage 1 and the ring cage 2 are fixed by the fixing bracket 13 and the fixing strip 14. At the same time, the roller opening 4 is used to constrain the roller 12 to form a complete and reliable cage as a whole.

[0037] In some embodiments, the fixing block 3 has a plurality of equally spaced notches 7 at the position corresponding to the inner peripheral wall of the roller opening 4, and the fixing block 3 at the center position of the roller opening 4 has an arc-shaped groove 8 concentric with the corresponding position of the annular frame 1 and the annular frame 2.

[0038] The recess 7 allows bearing lubricating grease to enter between the roller 12 and the fixing block 3 of the roller opening 4 for lubrication. The groove 8 allows lubricating grease to enter both ends of the roller 12 through the groove 8. Together with the recess 7, the roller 12 can obtain more lubricating grease to ensure smooth rotation of the roller 12.

[0039] In some embodiments, a plurality of spherical protrusions 9 are fixed at equal intervals at the bottom of the roller opening 4 corresponding to the outer position of the through hole 6, and the two ends of the roller 12 abut against the spherical protrusions 9 at the corresponding positions.

[0040] The spherical bump 9 is used to reduce the frictional resistance at both ends of the roller 12. In addition, the raised surface makes it easier for lubricating grease to enter the space at both ends of the roller 12. Combined with the setting of the notch 7 and groove 8, the lubricating grease can be conveniently lubricated between the contact surface of the roller 12 and the fixed block 3, so as to comprehensively ensure the smooth rotation of the roller 12. The smooth rotation of the roller 12 avoids affecting the rotation of the cylindrical roller 18, and makes the entire cage and bearing fit better.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A long-life bearing cage, comprising a first ring cage (1) and a second ring cage (2), characterized in that, Multiple fixed blocks (3) with equal spacing are fixed on both the first ring frame (1) and the second ring frame (2). Roller openings (10) are reserved on the first ring frame (1) and the second ring frame (2) between adjacent fixed blocks (3). A cylindrical roller (18) is placed in the roller opening (10). The two ends of the cylindrical roller (18) abut against the corresponding positions of the first ring frame (1) and the second ring frame (2). A roller opening (4) is opened in the middle of the fixed block (3). A roller (12) is placed in the roller opening (4). The two ends of the roller (12) abut against the corresponding positions of the first ring frame (1) and the second ring frame (2). The roller (12) rolls in contact with the surface of the cylindrical roller (18).

2. The long-life bearing cage according to claim 1, characterized in that, The fixed block (3) has an opening (5) at the position corresponding to the roller opening (10). The roller (12) rolls in contact with the surface of the cylindrical roller (18) at the opening (5). The side of the fixed block (3) at the position of the roller opening (10) is set as an arc surface (11) that matches the surface of the cylindrical roller (18).

3. The long-life bearing cage according to claim 1, characterized in that, A fixing frame (13) is installed on the outer side of the second ring frame (2) corresponding to the position of the roller (12), and a fixing strip (14) is installed on the outer side of the first ring frame (1) corresponding to the position of the fixing frame (13). The fixing strip (14) is fixed to the fixing frame (13) at the corresponding position.

4. The long-life bearing cage according to claim 3, characterized in that, Both the first ring frame (1) and the second ring frame (2) have through holes (6) at the center of the roller opening (4). The fixed frame (13) and the fixed strip (14) are fixed with protruding posts (15) at the positions corresponding to the through holes (6). The protruding posts (15) on the fixed frame (13) and the fixed strip (14) abut against the through holes (6) of the second ring frame (2) and the first ring frame (1) at the corresponding positions to form a support.

5. The long-life bearing cage according to claim 4, characterized in that, The cross-section of the fixing frame (13) is U-shaped. A pin (16) is fixed on the end of the fixing frame (13) facing the fixing bar (14). A fixing hole (17) is opened on the fixing bar (14) corresponding to the position of the pin (16). The pin (16) passes through the fixing hole (17) at the corresponding position.

6. The long-life bearing cage according to claim 2, characterized in that, The inner and outer sides of the second ring frame (2) and the first ring frame (1) at the roller opening (4) are open. The distance between the inner openings of the second ring frame (2) and the first ring frame (1) at the roller opening (4) is a, and the distance between the outer openings of the second ring frame (2) and the first ring frame (1) at the roller opening (4) is b, where a < b.

7. The long-life bearing cage according to claim 1, characterized in that, The fixing block (3) has multiple equally spaced notches (7) on the inner peripheral wall of the roller opening (4), and the fixing block (3) at the center of the roller opening (4) has an arc-shaped groove (8) with the same center as the corresponding ring frame one (1) and ring frame two (2).

8. The long-life bearing cage according to claim 7, characterized in that, The bottom of the roller opening (4) is fixed with multiple spherical protrusions (9) at equal intervals on the outer side of the through hole (6), and the two ends of the roller (12) abut against the spherical protrusions (9) at the corresponding positions.

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