Limiting ball bearing

Abstract

The utility model relates to a kind of limit ball bearings, it includes outer ring, inner ring, retainer, limit ball, limit ball design is spherical and spherical corresponding two ends are set into limit platform;The section of outer annular raceway and inner annular raceway is all designed to be "U" shape, bottom is circular arc channel, circular arc channel two sides channel wall is parallel with radial direction;Each channel wall and circular arc channel connecting root part is designed one annular oil groove respectively, annular oil groove is interconnected with corresponding inner annular raceway or outer annular raceway.Occupation is that the raceway two sides of outer ring and inner ring are designed with the channel wall with limit, while the limit ball of the application designs two ends into limit platform, middle keeps the rolling part of spherical, realizes that limit ball is rolled in upper and lower raceway and is limited design;Annular oil groove is also designed in channel wall root part, increase bearing grease space, prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of forklift bearings, specifically to a ball bearing with a limit position. Background Technology

[0002] Forklift bearings are crucial components of forklifts, superior to ordinary bearings in manufacturing processes, materials, and performance. They play a key role in the stability, lifespan, and safety of forklifts, making them indispensable equipment for pallet and container transport. Forklifts hold a vital position in enterprise logistics systems, widely used in stations, ports, airports, factories, warehouses, and many other locations. They are highly efficient equipment for mechanized loading, unloading, stacking, and short-distance transportation. With China's rapid economic development, mechanized handling, primarily using forklifts, has gradually replaced traditional manual handling, and the demand for forklifts in China has grown at a double-digit rate annually in recent years.

[0003] Currently, customers use ball bearings in forklift masts (such as...). Figure 1 When used in a certain vehicle model, bearing wear during operation increases the clearance, and the axial clearance of the bearing increases, while the tilt angle A also increases (e.g. Figure 2 The forklift mast will experience significant shaking; the bearing will sway sideways due to excessive axial displacement of the outer and inner rings; the customer requested a ball bearing with a smaller axial clearance, and we designed an axially limited structure according to the customer's requirements; this design increases the space for bearing grease, thereby improving bearing performance and lifespan. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model proposes a ball bearing with a limiting function. It has an ingenious design, a reasonable and compact structure, axial limiting function, and increased bearing grease space, thereby improving bearing performance and life.

[0005] The technical solution of this utility model: A ball bearing with limiting bearings includes an outer ring, an inner ring, a cage, and limiting balls. The outer ring has an inner annular raceway on its inner side, and an outer annular raceway on its outer side. The inner ring is located inside the outer ring, and several limiting balls are installed between the outer and inner rings. The upper ends of the limiting balls roll within the inner annular raceway, and the lower ends of the limiting balls roll within the outer annular raceway. A cage is also provided on both sides of the limiting balls for auxiliary installation. The limiting balls are designed as spheres, with corresponding limiting platforms at their two ends. The cross-sections of both the outer and inner annular raceways are designed in the shape of a "...". The U-shaped ball has an arc-shaped groove at the bottom, with the groove walls on both sides parallel to the radial direction. Each groove wall is connected to the arc-shaped groove at the root, and an annular oil groove is designed to connect with the corresponding inner or outer annular raceway. The upper spherical surface of the limiting ball is located within the arc-shaped groove of the inner annular raceway, and the upper ends of the limiting platforms on both sides of the limiting ball slide within the groove wall of the inner annular raceway. The lower spherical surface of the limiting ball is located within the arc-shaped groove of the outer annular raceway, and the lower ends of the limiting platforms on both sides of the limiting ball slide within the groove wall of the outer annular raceway.

[0006] The cage includes two half-cages, each half-cage having several deep grooves. The deep grooves have a flat bottom and arc-shaped sides. The two half-cages are interlocked to form a complete cage, and the contact points of the two half-cages are riveted together with rivets.

[0007] The outer ring and the inner ring are also designed with left and right sealing rings, which are respectively installed between the outer ring and the inner ring on the left and right sides of several limiting balls.

[0008] The axial clearance between the limiting platform of the limiting ball and the channel wall is less than or equal to 0.2 mm.

[0009] The curvature of the arc-shaped channel is 0.5-0.505, which is the spherical diameter coefficient of the limiting ball.

[0010] The advantages of this utility model are: The outer and inner raceways are respectively designed with limiting groove walls on both sides. At the same time, the limiting ball of this application is designed with limiting platforms at both ends and the rolling part of the ball is retained in the middle, realizing the limiting ball rolling and limiting design in the upper and lower raceways. An annular oil groove is also designed at the root of the groove wall to increase the space for bearing grease and extend service life. The cage structure is designed with two half cages, and the deep groove structure is manufactured to mimic the shape of the limit ball to ensure effective assistance in installing the limit ball. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a traditional forklift mast ball bearing.

[0012] Figure 2This is a schematic diagram of the axial offset of the ball bearing in a traditional forklift mast.

[0013] Figure 3 This is a schematic diagram of the present invention.

[0014] Figure 4 This is a partially enlarged schematic diagram of the present invention.

[0015] Figure 5 This is a partially enlarged schematic diagram of the outer and inner rings of this utility model.

[0016] Figure 6 This is a partially enlarged schematic diagram of the retainer of this utility model. Detailed Implementation

[0017] See attached document Figure 3-6 A bearing with limiting balls 4 includes an outer ring 1, an inner ring 2, a cage 3, and limiting balls 4. The outer ring 1 has an inner annular raceway 11 on its inner side, and the inner ring 2 has an outer annular raceway 22 on its outer side. The inner ring 2 is located inside the outer ring 1, and several limiting balls 4 are installed between the outer ring 1 and the inner ring 2. The upper ends of the limiting balls 4 roll within the inner annular raceway 11, and the lower ends of the limiting balls 4 roll within the outer annular raceway 22. A cage 3 is also provided on both sides of the limiting balls 4 for auxiliary installation. The limiting balls 4 are designed as spheres, with corresponding limiting platforms at both ends. The cross-sections of the outer annular raceway 22 and the inner annular raceway 11 are both designed in a "U" shape with a rounded bottom. The arc-shaped channel 101 has channel walls 102 on both sides that are parallel to the radial direction. Each channel wall 102 is connected to the arc-shaped channel 101 by an annular oil groove 103, which is connected to the corresponding inner annular raceway 11 or outer annular raceway 22. The upper spherical surface of the limiting ball 4 is located inside the arc-shaped channel 101 of the inner annular raceway 11, and the upper ends of the limiting platforms on both sides of the limiting ball 4 slide inside the channel wall 102 of the inner annular raceway 11. The lower spherical surface of the limiting ball 4 is located inside the arc-shaped channel 101 of the outer annular raceway 22, and the lower ends of the limiting platforms on both sides of the limiting ball 4 slide inside the channel wall 102 of the outer annular raceway 22.

[0018] The retainer 3 includes two half retainers 30, each half retainer 30 including several deep grooves 31. The deep grooves 31 have a flat bottom and arc-shaped sides. The two half retainers 3 are interlocked to form a complete retainer 3. The contact positions of the two half retainers 3 are riveted together by rivets 32.

[0019] The outer ring 1 and the inner ring 2 are also designed with left and right sealing rings, which are respectively installed between the outer ring 1 and the inner ring 2 on the left and right sides of a plurality of limiting balls 4.

[0020] The axial clearance between the limiting platform of the limiting ball 4 and the channel wall 102 is less than or equal to 0.2 mm.

[0021] The curvature of the arc-shaped channel 101 is the spherical diameter coefficient of the limiting ball 4, which is 0.5-0.505.

[0022] When this invention is used, the axial limiting design increases the curvature of the bearing, improving its stability. Under radial force, the contact between the raceway and the ball transitions from line contact to partial surface contact over time. This improves the bearing's load-bearing capacity and extends its service life.

Claims

1. A ball bearing with a limiting function, characterized in that, It includes an outer ring, an inner ring, a cage, and limiting balls. The inner side of the outer ring has an inner annular raceway, and the outer side of the inner ring has an outer annular raceway. The inner ring is located inside the outer ring, and several limiting balls are installed between the outer and inner rings. The upper ends of the limiting balls roll within the inner annular raceway, and the lower ends of the limiting balls roll within the outer annular raceway. Cages are also provided on both sides of the limiting balls for auxiliary installation. The limiting balls are designed as spheres, with corresponding limiting platforms at both ends. The cross-sections of both the outer and inner annular raceways are designed in a "U" shape. The bottom is an arc-shaped groove, and the groove walls on both sides of the arc-shaped groove are parallel to the radial direction. Each groove wall is connected to the arc-shaped groove with an annular oil groove, which is connected to the corresponding inner or outer annular raceway. The upper spherical surface of the limiting ball is located in the arc-shaped groove of the inner annular raceway, and the upper ends of the limiting platforms on both sides of the limiting ball slide inside the groove wall of the inner annular raceway. The lower spherical surface of the limiting ball is located in the arc-shaped groove of the outer annular raceway, and the lower ends of the limiting platforms on both sides of the limiting ball slide inside the groove wall of the outer annular raceway.

2. A ball bearing with a limiting mechanism according to claim 1, characterized in that, The cage includes two half-cages, each half-cage having several deep grooves. The deep grooves have a flat bottom and arc-shaped sides. The two half-cages are interlocked to form a complete cage, and the contact points of the two half-cages are riveted together with rivets.

3. A ball bearing with a limiting mechanism according to claim 1, characterized in that, The outer ring and the inner ring are also designed with left and right sealing rings, which are respectively installed between the outer ring and the inner ring on the left and right sides of several limiting balls.

4. A ball bearing with a limiting mechanism according to claim 1, characterized in that, The axial clearance between the limiting platform of the limiting ball and the channel wall is less than or equal to 0.2 mm.

5. A ball bearing with a limiting mechanism according to claim 1, characterized in that, The curvature of the arc-shaped channel is 0.5-0.505, which is the spherical diameter coefficient of the limiting ball.

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