Bearing structure capable of prolonging service cycle

Abstract

The utility model relates to a bearing structure with a prolonged service life, which comprises an outer ring, an inner ring, a retainer, a sealing ring and steel balls, the inner ring is designed to be two separable symmetrical half rings, the outer peripheral surface of each half ring is provided with an annular arc-shaped groove, and the two rows of steel balls are fixedly mounted in an auxiliary manner through the same retainer. A plurality of large semicircular clamping grooves are designed in the two sides of the retainer respectively, isosceles trapezoid grooves with narrow bottoms and wide openings are formed between the adjacent large semicircular clamping grooves in the same side, sealing rings are further installed on the two sides between the inner ring and the outer ring respectively, the inner sides of the sealing rings are coated with lubricating grease, and the isosceles trapezoid grooves are also filled with the lubricating grease. The ball bearing has the advantages that the design is ingenious, the structure is reasonable and compact, the two inner rings are designed, and the plastic retainer is designed to be arranged in the middle to fix balls on the two sides; due to the design, the grease filling space can be increased by more than one time; the performance and the service life of the bearing are greatly improved; the inner ring locking protrusion enables the inner ring not to fall off easily after the inner ring is assembled.

Description

Technical Field

[0001] This utility model relates to the field of bearings, and specifically to a bearing structure that enhances service life. Background Technology

[0002] Double row ball bearings are a crucial component widely used in forklifts, primarily supporting the mast system and side rollers. These bearings can withstand significant loads and possess excellent wear resistance and rotational accuracy, ensuring stable operation of the forklift under various working conditions.

[0003] Forklift double row ball bearings often receive feedback from customers that the grease level is too low. This is because the bearing design needs to meet load and sealing performance requirements, etc. Figure 1 Traditional bearing designs require two plastic cages, and ensuring the strength of these cages results in limited grease filling space. This paper proposes a bearing design that increases grease space, thereby improving bearing performance. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model proposes a bearing structure that enhances service life. It features an ingenious design, a reasonable and compact structure, and extends service life.

[0005] The technical solution of this utility model:

[0006] A bearing structure designed to enhance service life includes an outer ring, an inner ring, a cage, a seal, and steel balls. The outer ring has two annular grooves on its inner side. The inner ring is designed as two separable symmetrical semicircles, each with an annular arc groove on its outer circumference. The two semicircles are joined together to form an inner ring. Two rows of steel balls are installed between the inner and outer rings. The upper ends of the two rows of steel balls roll within the corresponding annular grooves, and the lower ends roll within the annular arc grooves. The two rows of steel balls are fixedly installed in the middle by the same cage. Several large semicircular grooves are designed on both sides of the cage. An isosceles trapezoidal groove with a narrow bottom and a wide opening is formed between adjacent large semicircular grooves on the same side. A seal is also installed on both sides between the inner and outer rings. The inner side of the seal is coated with lubricating grease, and lubricating grease is also stored in the isosceles trapezoidal groove.

[0007] The retainer is a plastic retainer.

[0008] The bottom of the annular arc groove is also designed with a locking protrusion. The side of the locking protrusion closer to the steel ball is designed as an arc surface, and the side of the locking protrusion away from the steel ball is designed as a downward sloping surface.

[0009] The height of the locking protrusion is 0.1 mm.

[0010] The radius of curvature of the arc-shaped surface is the same as that of the annular channel.

[0011] The advantages of this utility model are its ingenious design and reasonable and compact structure. The inner ring is divided into two parts, and the plastic retainer is designed to fix the balls on both sides in the middle. This design can increase the grease filling space by more than 100%, which greatly improves the bearing performance and service life. The inner ring locking protrusion prevents the inner ring from easily falling off after assembly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a traditional double-row ball bearing.

[0013] Figure 2 This is a schematic diagram of the present invention.

[0014] Figure 3 This is a partial schematic diagram of the retainer of this utility model.

[0015] Figure 4 This is a partially enlarged schematic diagram of a half-circle of the inner ring of this utility model. Detailed Implementation

[0016] See attached document Figure 2-4 A bearing structure designed to enhance service life includes an outer ring 1, an inner ring 2, a cage 3, a seal ring 4, and steel balls 5. The outer ring 1 has two annular grooves on its inner side. The inner ring 2 is designed as two separable symmetrical semi-rings 21. The outer circumference of the semi-rings 21 has an annular arc groove 22. The two semi-rings 21 are joined together to form an inner ring 2. Two rows of steel balls 5 are installed between the inner ring 2 and the outer ring 1. The upper ends of the two rows of steel balls 5 roll in the corresponding annular grooves, and the lower ends of the two rows of steel balls 5 roll in the annular arc groove 22. The two rows of steel balls 5 are fixedly installed in the middle by the same cage 3. Several large semi-circular grooves 31 are designed on both sides of the cage 3. An isosceles trapezoidal groove 32 with a narrow bottom and a wide opening is opened between adjacent large semi-circular grooves 31 on the same side. A seal ring 4 is also installed on both sides between the inner ring 2 and the outer ring 1. The inner side of the seal ring 4 is coated with lubricating grease, and the isosceles trapezoidal groove 32 also stores lubricating grease.

[0017] The retainer 3 is a plastic retainer 3.

[0018] The bottom of the annular arc groove 22 is also designed with a locking protrusion 23. The side of the locking protrusion 23 closest to the steel ball 5 is designed as an arc-shaped surface 231, and the side of the locking protrusion 23 furthest from the steel ball 5 is designed as a downwardly sloping surface 232. The height of the locking protrusion 23 is 0.1mm. The sloping surface design facilitates the insertion of the steel ball under it during half-circle assembly, allowing the steel ball to enter the arc-shaped surface side for effective support. The height design of the locking protrusion prevents the half-circle from falling off.

[0019] The radius of curvature of the arc-shaped surface 231 is the same as that of the annular groove. This design ensures that the side can effectively accommodate the steel ball, provide effective support for the steel ball, and meet load requirements.

[0020] In use, the inner ring of this invention is designed as two semicircles, with two rows of steel balls sharing a central plastic retainer, saving space and allowing for more lubricating grease to be held. Simultaneously, the retainer also features an isosceles trapezoidal groove in its empty space, which can hold even more lubricating grease, effectively extending the bearing's service life. Furthermore, a 0.1mm high locking protrusion is designed around the bottom of the annular groove of each semicircle, effectively locking the semicircle into the inner side of the outer ring. The steel balls and the arc-shaped surface design prevent the semicircle from falling off and provide effective support.

Claims

1. A bearing structure for enhancing service life, characterized in that, It includes an outer ring, an inner ring, a cage, a sealing ring, and steel balls. The inner ring has two annular grooves on its inner side. The inner ring is designed as two separable symmetrical semicircles. The outer circumference of each semicircle has an annular arc groove. The two semicircles are joined together to form an inner ring. Two rows of steel balls are installed between the inner and outer rings. The upper ends of the two rows of steel balls roll in the corresponding annular grooves, and the lower ends roll in the annular arc grooves. The two rows of steel balls are fixed in the middle by the same cage. Several large semicircular slots are designed on both sides of the cage. Between adjacent large semicircular slots on the same side, there is an isosceles trapezoidal groove with a narrow bottom and a wide opening. A sealing ring is also installed on both sides between the inner and outer rings. The inner side of the sealing ring is coated with lubricating grease, and the isosceles trapezoidal groove also stores lubricating grease.

2. The bearing structure for enhancing service life according to claim 1, characterized in that, The retainer is a plastic retainer.

3. The bearing structure for enhancing service life according to claim 1, characterized in that, The bottom of the annular arc groove is also designed with a locking protrusion. The side of the locking protrusion closer to the steel ball is designed as an arc surface, and the side of the locking protrusion away from the steel ball is designed as a downward sloping surface.

4. The bearing structure for enhancing service life according to claim 3, characterized in that, The height of the locking protrusion is 0.1 mm.

5. A bearing structure for enhancing service life according to claim 3, characterized in that, The radius of curvature of the arc-shaped surface is the same as that of the annular channel.

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