Split cylindrical roller bearing cage and method for assembling same

Abstract

The present application relates to a split cylindrical roller bearing cage and its assembling method. The cage comprises a first half cage body, a second half cage body, a clamping beam, a concave groove and a locking clip. The first half cage body and the second half cage body are connected into an integrated cage by the clamping beam and the locking clip. The first half cage body and the second half cage body are both provided with a half-circular cage with a boss at each end. The clamping beam is formed by a first boss of the first half cage body and a second boss of the second half cage body. The first boss and the second boss are bosses of the same structure. The present application greatly saves the processing time, effectively improves the processing efficiency, and provides a split cylindrical roller bearing cage with good stress performance, long service life and high reliability.

Description

Technical Field

[0001] This invention relates to the field of bearing manufacturing technology, and in particular to a split cylindrical roller bearing cage and its assembly method. Background Technology

[0002] Split cylindrical roller bearings are widely used in conveyors, marine propulsion systems, cooling beds, continuous casting machines, stacker-reclaimers, motors, and generators, among other applications. There are various cage types, some using riveted connections, which can lead to unnecessary deformation during processing and use, and also occupy a large amount of space. Split cylindrical roller bearings suffer from limited design space, high speeds, and significant installation limitations. To address these challenges, there is an urgent need to design a split cylindrical roller bearing cage that offers good load-bearing performance, long service life, and high reliability. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a novel split cylindrical roller bearing cage that can improve the connection strength and stability of the cage, achieve precise guidance of the cage, ensure good contact between the rollers and the pockets, prevent the rollers from falling off from the inner and outer diameters, and simplify the bearing assembly process.

[0004] The adopted technical solution is: a split cylindrical roller bearing cage, including a first half-cage body, a second half-cage body, a clamping beam, a concave groove, and a locking clip. The first half-cage body and the second half-cage body are connected as a single cage through the clamping beam and the locking clip. Both ends of the first half-cage body and the second half-cage body are provided with bosses. The clamping beam is formed by combining the first boss of the first half-cage body and the second boss of the second half-cage body. The first boss and the second boss are bosses of the same structure. The concave groove is provided on the inner diameter surface at the connection between the first half-cage body and the second half-cage body. The concave groove is formed by combining the first rectangular groove of the first half-cage body and the second rectangular groove of the second half-cage body.

[0005] Furthermore, the locking clip is a U-shaped elastic clip; the U-shaped elastic clip consists of a pair of clamping arms, a fastening part, and a bending part; the pair of clamping arms gradually shrink until the fastening part forms an elastic clamping opening; the fastening parts at both ends of the locking clip extend to the bending part.

[0006] Furthermore, the boss is composed of a large right-angled trapezoidal body, a cuboid body, and a small right-angled trapezoidal body. The angle between the upper base of the large right-angled trapezoidal body and the inclined side of the body is an obtuse angle I, which facilitates the contact between the bent part of the locking clip and the inclined side of the large right-angled trapezoidal body, allowing the locking clip to be better installed on the clamping beam, achieving maximum time and labor saving. The angle between the upper base of the small right-angled trapezoidal body and the inclined side of the body is an obtuse angle II, which facilitates a tighter fit between the fastening part of the locking clip and the inclined side of the small right-angled trapezoidal body, making the connection between the two half-cage bodies more compact and forming an integrated cage. The obtuse angle I and obtuse angle II have the same inclination angle, preferably 135°, which is easy for the boss to process. The length of the upper base of the large right-angled trapezoidal body is less than the length of the upper base of the small right-angled trapezoidal body.

[0007] Furthermore, the fastening part of the locking clip contacts the inclined waist surface of the small right-angled trapezoid; the width of the locking clip is the same as the axial width d of the clamping beam, which limits the movement of the two half-cages in the axial direction, preventing them from shifting and becoming misaligned on the inner and outer diameters; the bending part is located inside the concave groove to prevent the bending part of the locking clip from protruding from the inner diameter surface of the two half-cages, thus scratching the cylindrical rollers.

[0008] Furthermore, the pockets of the first and second half-cages are straight pockets near the outer diameter and tapered pockets near the inner diameter. The tapered pockets are preferably smaller than the roller diameter and have a taper of 35° to ensure that the roller does not fall out of the inner diameter and that the roller is tangent to the tapered pocket in its natural state, preventing the roller from being clamped. The straight pockets have four locking points on their outer diameter to ensure that the roller is not scratched after being installed from the outer diameter and that the roller does not fall out from the outer diameter direction. The four corners of the roller pockets are provided with elliptical relief grooves to prevent stress concentration and facilitate the installation of the roller from the outer diameter direction.

[0009] The assembly method for a split cylindrical roller bearing cage includes the following steps:

[0010] Step 1: Press the cylindrical rollers into the cage from the outer diameter direction to form a roller cage assembly;

[0011] Step 2: Assemble the first half-cage body and the second half-cage body with cylindrical rollers onto the inner ring of the bearing.

[0012] Step 3: Place the positioning block in the concave groove to align the inner and outer diameters of the first half-cage and the second half-cage. The positioning block is a rectangular block that mates with the concave groove. During installation, the concave groove of the cage is used to position the positioning block to ensure that the inner diameter, outer diameter, first rectangular groove, and second rectangular groove are aligned for subsequent assembly of the locking clip.

[0013] Step 4: Remove the positioning block from the end face of the cage; keep the first half of the cage and the second half of the cage stable and stationary;

[0014] Step 5: Insert the locking clip into the connection between the first half of the retainer and the second half of the retainer. After the locking clip is interference-fitted with the clamping beam, the two half retainers are combined into a single retainer. The bent part of the locking clip first contacts the inclined waist surface of the large right-angled trapezoid. As the locking clip is pushed forward, the fastening part of the locking clip will lock into the inclined waist surface of the small right-angled trapezoid, ensuring the tightness of the connection.

[0015] Beneficial effects: The split cylindrical roller bearing cage of the present invention adopts a locking clip connection. After the first half of the cage body is aligned with the second half of the cage body, the locking clip is installed into the cage. The structure is simple and the two half cages are completely identical, which greatly saves processing time and effectively improves processing efficiency. It provides a split cylindrical roller bearing cage with good stress performance, long service life and high reliability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a structural diagram of the first half-cage and the second half-cage.

[0018] Figure 3 This is a schematic diagram of the cage pocket.

[0019] Figure 4 This is a cross-sectional view of the first half of the retainer and the second half of the retainer.

[0020] Figure 5 This is a schematic diagram of the cage locking rollers.

[0021] Figure 6 Schematic diagram of cage structure.

[0022] Figure 7 This is a schematic diagram of the connection between the first half-cage and the second half-cage.

[0023] Figure 8 This is a diagram of the locking mechanism.

[0024] Figure 9 This is the right view of the boss.

[0025] Figure 10 It is an isometric view of the boss.

[0026] In the diagram: 1. Locking point; 2. Elliptical relief groove; 3. Straight pocket hole; 4. Conical pocket hole; 5. Clamping beam; 501. First boss; 502. Second boss; 511. Large right-angled trapezoid; 512. Cuboid; 513. Small right-angled trapezoid; 6. Concave groove; 601. First rectangular groove; 602. Second rectangular groove; 8. Locking clip; 811. A pair of clamping arms; 812. Fastening part; 813. Bending part; 9. First half-cage body; 10. Second half-cage body. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Please refer to 1-10. This invention provides a technical solution: a split cylindrical roller bearing cage, including a first half-cage body 9, a second half-cage body 10, a clamping beam 5, a concave groove 6, and a locking clip 8. The first half-cage body 9 and the second half-cage body 10 are connected as an integral cage through the clamping beam 5 and the locking clip 8. Both ends of the first half-cage body 9 and the second half-cage body 10 are provided with bosses. The clamping beam 5 is formed by combining the first boss 501 of the first half-cage body 9 and the second boss 502 of the second half-cage body 10. The first boss 501 and the second boss 502 are bosses of the same structure. The concave groove 6 is provided on the inner diameter surface at the connection between the first half-cage body 9 and the second half-cage body 10. The concave groove 6 is formed by combining the first rectangular groove 601 of the first half-cage body 9 and the second rectangular groove 602 of the second half-cage body 10.

[0029] Furthermore, the locking clip 8 is a U-shaped elastic clip; the U-shaped elastic clip consists of a pair of clamping arms 811, a fastening part 812 and a bending part 813; the pair of clamping arms 811 gradually shrink until the fastening part 812 forms an elastic clamping opening; the fastening parts 812 at both ends of the locking clip 8 extend to the bending part 813.

[0030] Furthermore, the boss is composed of a large right-angled trapezoid 511, a cuboid 512, and a small right-angled trapezoid 513; the angle between the upper base of the cross-section of the large right-angled trapezoid 511 and the inclined side of the cross-section is an obtuse angle, which facilitates the contact between the bent part 813 of the locking clip 8 and the inclined side of the large right-angled trapezoid 511, allowing the locking clip 8 to be better installed on the clamping beam 5, achieving maximum time and labor saving; the upper base of the cross-section of the small right-angled trapezoid 513... The obtuse angle between the oblique waist of the cross section and the oblique waist surface is 2, which is conducive to a tighter fit between the fastening part 812 of the locking clip 8 and the oblique waist surface of the small right-angled trapezoid 513, making the connection between the two half-cage bodies more compact and forming an integrated cage; the obtuse angle 1 and obtuse angle 2 have the same inclination angle, preferably 135°, which is easy to process the boss; the length of the upper base of the cross section of the large right-angled trapezoid 511 is less than the length of the upper base of the cross section of the small right-angled trapezoid 513.

[0031] Furthermore, the fastening part 812 of the locking clip 8 contacts the inclined waist surface of the small right-angled trapezoid 513; the width of the locking clip 8 is the same as the axial width d of the clamping beam 5, which realizes the limiting function of the two half-cage bodies and prevents the two half-cage bodies from moving in the axial direction, so that the inner and outer diameters of the two half-cage bodies cannot be aligned; the bending part 813 is located inside the concave groove 6 to prevent the bending part 813 of the locking clip 8 from protruding from the inner diameter surface of the two half-cage bodies, so as not to scratch the cylindrical roller.

[0032] Furthermore, the pockets of the first half-cage body 9 and the second half-cage body 10 are straight pockets 3 near the outer diameter and tapered pockets 4 near the inner diameter. The tapered pocket 4 is preferably slightly smaller than the roller diameter and has a taper of 35° to ensure that the roller does not fall out of the inner diameter and that the roller is tangent to the tapered pocket 4 in a natural state, without clamping the roller. The straight pocket 3 has four locking points 1 on its outer diameter to ensure that the roller is not scratched after being installed from the outer diameter and that the roller does not fall out from the outer diameter direction. The four corners of the roller pocket are provided with elliptical relief grooves 2 to prevent stress concentration and facilitate the installation of the roller from the outer diameter direction.

[0033] The assembly method for a split cylindrical roller bearing cage includes the following steps:

[0034] Step 1: Press the cylindrical rollers into the cage from the outer diameter direction to form a roller cage assembly;

[0035] Step 2: Assemble the first half-cage body 9 and the second half-cage body 10 with cylindrical rollers onto the inner ring of the bearing.

[0036] Step 3: Place the positioning block in the concave groove 6 so that the inner and outer diameters of the first half retainer 9 and the second half retainer 10 are aligned; the positioning block is a rectangular block that mates with the concave groove 6; during installation, the concave groove 6 of the retainer is used to position the positioning block to ensure that the inner diameter, outer diameter, first rectangular groove 601 and second rectangular groove 602 are aligned so that the locking clip 8 can be assembled later.

[0037] Step 4: Remove the positioning block from the end face of the cage to keep the first half of the cage 9 and the second half of the cage 10 stable and immobile; alternatively, the positioning block can be left in place and the locking clip 8 can be directly inserted into the clamping beam 5, and the positioning block will automatically move out as the locking clip 8 is pushed in.

[0038] Step 5: Insert the locking clip 8 into the connection between the first half-cage body 9 and the second half-cage body 10. After the locking clip 8 is interference-fitted with the clamping beam 5, the two half-cage bodies are combined into a single cage. The bent part 813 of the locking clip 8 first contacts the inclined waist surface of the large right-angled trapezoid 511. As the locking clip 8 is pushed forward, the fastening part 812 of the locking clip 8 will lock with the inclined waist surface of the small right-angled trapezoid 513 to ensure the tightness of the connection.

Claims

1. A split cylindrical roller bearing cage, characterized in that: The device includes a first half-cage body, a second half-cage body, a clamping beam, a concave groove, and a locking clip. The first half-cage body and the second half-cage body are connected as a single retainer via the clamping beam and the locking clip. Both ends of the first and second half-cage bodies have bosses. The clamping beam is formed by combining a first boss of the first half-cage body and a second boss of the second half-cage body. The first and second bosses are of the same structure. The concave groove is located on the inner diameter surface at the connection between the first and second half-cage bodies. The concave groove is formed by combining a first rectangular groove of the first half-cage body and a second rectangular groove of the second half-cage body. The locking clip is a U-shaped elastic clip; the U-shaped elastic clip consists of a pair of clamping arms, a fastening part, and a bending part; the pair of clamping arms gradually narrow to form an elastic clamping opening at the fastening part; the fastening parts at both ends of the locking clip extend to the bending part; The boss is composed of a large right-angled trapezoid, a cuboid, and a small right-angled trapezoid; the angle between the upper base of the cross-section of the large right-angled trapezoid and the oblique side of the cross-section is obtuse angle I; the angle between the upper base of the cross-section of the small right-angled trapezoid and the oblique side of the cross-section is obtuse angle II; obtuse angle I and obtuse angle II have the same inclination angle; the length of the upper base of the cross-section of the large right-angled trapezoid is less than the length of the upper base of the cross-section of the small right-angled trapezoid. The first half-cage and the second half-cage have straight pockets near the outer diameter and tapered pockets near the inner diameter; four locking points are provided at the outer diameter of the straight pockets; and elliptical relief grooves are provided at the four corners of the roller pockets.

2. The split cylindrical roller bearing cage according to claim 1, characterized in that: The fastening part of the locking clip contacts the inclined waist surface of the small right-angled trapezoid; the width of the locking clip is the same as the axial width of the clamping beam; the bent part is located inside the concave groove.

3. The assembly method of the split cylindrical roller bearing cage according to claim 1 or 2, characterized in that, Includes the following steps: Step 1: Press the cylindrical rollers into the cage from the outer diameter direction to form a roller cage assembly; Step 2: Assemble the first half-cage body and the second half-cage body with cylindrical rollers onto the bearing inner ring. Step 3: Place the positioning block into the concave groove so that the inner and outer diameters of the first half-cage and the second half-cage are aligned; the positioning block is a rectangular block that mates with the concave groove. Step 4: Remove the positioning block from the end face of the cage; keep the first half of the cage and the second half of the cage stable and stationary; Step 5: Insert the locking clip into the connection between the first half-cage body and the second half-cage body. After the locking clip engages with the clamping beam, the two half-cage bodies are combined into a single cage.

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