Orbiting rolling isolator bearing

Abstract

This invention discloses a track-type rolling isolating bearing, belonging to the field of rolling bearing technology. The bearing includes an outer ring, an inner ring, main rollers, a limiting baffle, a track assembly, and an isolating cage assembly. The track assembly consists of a fixed track and a movable track, and the isolating cage assembly includes a fixed isolating cage and a movable split isolating cage. This invention optimizes the assembly position of the isolating assembly and the primary and secondary coordination logic of the tracks: when the limiting baffle is fixed to the outer ring, the isolating cage assembly is located below the center line of the adjacent main rollers, with the inner ring track as the primary and the outer track as the secondary for positioning and guidance; when the limiting baffle is fixed to the inner ring, the isolating cage assembly is located above the center line of the adjacent main rollers, with the outer track as the primary positioning reference and the inner track as the auxiliary positioning. Simultaneously, the sleeve of the movable split isolating cage is made of brass, wear-resistant alloy, or wear-resistant nylon plastic, and the spindle is made of bearing steel. The main rollers can be any one of cylindrical rollers, spherical rollers, or tapered rollers, and can be adapted to various rolling element materials such as metal and ceramic.

Description

Technical Field

[0001] This invention belongs to the field of rolling bearing technology, specifically relating to a track-type rolling isolation bearing, which is suitable for complex industrial conditions such as high speed, heavy load, dust and humidity and variable load in engineering machinery, metallurgical equipment, transmission mechanisms, and power equipment, and is also compatible with high-end bearing assembly scenarios with metal and ceramic rolling elements. Background Technology

[0002] Most existing industrial rolling bearings employ integrated cages or single fixed track limiting structures, which present significant technical shortcomings under high-end and complex operating conditions. Integrated metal cages and rolling elements often engage in boundary friction contact, resulting in substantial wear and significant temperature rise during high-speed operation. Long-term operation can lead to wear deformation, cracking, and breakage, drastically shortening bearing lifespan. Integrated isolation structures have a fixed molding process, limiting material selection and making dimensional adjustments impossible based on on-site assembly clearances, resulting in extremely poor equipment adaptability. Furthermore, traditional bearings only have a single fixed limiting track, providing only basic limiting functions and failing to adapt to component machining tolerances and assembly errors. On-site alignment and assembly are difficult, with extremely low error tolerance. Moreover, traditional bearing isolation components are centrally mounted between two sets of main rollers, with no primary or secondary track division. During bearing operation, the main rollers and isolation components are prone to slippage, radial and axial movement, leading to insufficient operational stability. Furthermore, traditional bearings primarily use steel balls as rolling elements, resulting in a narrow structural definition that is incompatible with new wear-resistant rolling element materials such as ceramics, limiting their suitability for new high-end bearing products. Simultaneously, the isolation sleeve is made of a single material, exhibiting poor wear resistance and failing to meet the demands of heavy-load, high-frequency operation. Moreover, the lack of targeted eccentric assembly and primary / secondary track alignment design fails to balance structural strength, assembly convenience, wear resistance, and operational stability. In conclusion, existing bearing structures cannot meet the demands of diverse materials and complex operating conditions. The industry urgently needs a track-type rolling isolation bearing with optimized structure, broad material compatibility, clear primary / secondary track alignment, and flexible assembly methods. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings and defects of existing technologies by providing a track-type rolling isolating bearing. Through a double-cage, double-track composite structure design, coupled with an eccentric isolating component assembly structure and a primary / secondary track working mode, it is compatible with a multi-material wear-resistant system of brass, wear-resistant alloys, and wear-resistant nylon. Simultaneously, by adopting a broad definition of spherical rollers, it relaxes the material restrictions on rolling elements, making it compatible with metals and ceramics. Combined with a collaborative design of component size proportions, it completely solves the problems of high friction, easy movement, low assembly error tolerance, poor wear resistance, and weak adaptability to operating conditions and materials in traditional bearings. It balances structural strength, assembly convenience, adaptive fine-tuning capability, and sealing protection performance, thus broadening the range of applicable operating conditions and material compatibility for the bearing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a track-type rolling isolating bearing, comprising an outer ring, an inner ring, main rollers, a limiting baffle, a track assembly, and an isolating cage assembly; the main rollers are evenly and circumferentially arranged between the raceways of the outer ring and the inner ring, and an isolating cage assembly is assembled between each pair of adjacent sets of main rollers. The track assembly includes a fixed track and a movable track, and the isolating cage assembly includes a fixed isolating cage and a movable split isolating cage; the limiting baffle can be selectively fixedly installed on the inner side of the outer ring or the outer side of the inner ring, forming two differentiated assembly and positioning modes to adapt to different load and speed conditions. The movable, split-type isolation retainer consists of a mandrel and a movable bushing. The movable bushing is made of any wear-resistant material selected from brass, wear-resistant alloy, or wear-resistant nylon plastic, while the mandrel is made of bearing steel. The fixed isolation retainer is integrally milled from metal, resulting in high rigidity, strength, and positioning stability. The main rollers are any of cylindrical rollers, spherical rollers, or tapered rollers, without limitation to a single material. They are compatible with various mainstream bearing rolling element materials such as steel, ceramics, or high-hardness wear-resistant plastics. The isolation retainer and main roller structure are adapted to each other. The limiting baffle plate has a track groove that matches the track assembly. The two ends of the mandrel of the isolation retainer are limited and locked inside the track groove, achieving radial, axial, and circumferential all-round limiting constraints. The limiting baffle also integrates a sealing and protective structure, which can prevent external dust, moisture, and solid impurities from entering the bearing, achieving dustproof and waterproof protection. Each component adopts a proportional matching design: when the limiting baffle is fixed to the outer ring of the bearing, the ratio of the inner diameter of the bearing outer ring raceway to the outer diameter of the inner track inner ring is equal to the ratio of the outer diameter of the isolating cage outer sleeve to the outer diameter of the spindle outer ring; when the limiting baffle is fixed to the inner ring of the bearing, the ratio of the outer diameter of the bearing inner ring raceway to the inner diameter of the outer track is equal to the ratio of the outer diameter of the bushing to the outer diameters at both ends of the shaft. This proportional structure ensures that the linear velocity and revolution radius of all components are synchronized during operation, completely eliminating relative sliding friction.

[0005] This invention employs an eccentric assembly structure and a primary-secondary track working system: 1. When the limiting baffle is fixed to the outer ring of the bearing, the isolation retainer assembly is assembled at the lower position of the center lines of two adjacent main rollers. During operation, the inner track serves as the primary positioning and guiding structure, while the outer track acts as an auxiliary limiting structure, achieving precise positioning and anti-movement functions; 2. When the limiting baffle is fixed to the inner ring of the bearing, the isolation retainer assembly is assembled at the upper position of the center lines of two adjacent main rollers. During operation, the outer track serves as the primary positioning and guiding structure, while the inner track acts as an auxiliary limiting structure. There are no additional auxiliary positioning limitations, resulting in a simple structure and precise positioning. The fixed track is a reference rigid limiting structure with high positioning accuracy and strong load-bearing capacity, bearing the main load. The movable track has a reserved adjustment margin, allowing for adaptive fine-tuning based on component processing errors and assembly gaps, reducing on-site assembly difficulty, improving assembly fault tolerance, and forming a dual limiting system combining primary and secondary components with the fixed track. Beneficial effects

[0006] 1. Eccentric Assembly + Separate Primary and Secondary Track Functions for Ultimate Optimized Operational Stability. This invention abandons the traditional central assembly structure and sets up an eccentric assembly structure for the isolation components based on the different installation positions of the baffles, clearly defining the primary and secondary working modes of the inner and outer tracks. With the outer ring fixed baffle, the lower assembly and inner track dominate positioning; with the inner ring fixed baffle, the upper assembly and outer track dominate positioning, completely eliminating slippage and movement issues of the main rollers and isolation components, significantly improving operational synchronization. 2. Broad Roller Element Definition and Strong Material Compatibility. The main rollers adopt the universal definition of spherical rollers, no longer limited to steel spherical structures, and are compatible with new rolling element materials such as ceramics and alloy steel. This adapts to high-speed, insulating, and wear-resistant high-end special bearing scenarios, greatly expanding the product coverage. 3. Versatile Wear-Resistant Material Adaptability for Wider Operating Conditions: The movable bushing utilizes three high-wear-resistant materials: brass, wear-resistant alloy, and wear-resistant nylon plastic. It allows for flexible selection based on different operating conditions, such as high-speed light load, heavy-load impact, and quiet, dust-proof operation. This overcomes the shortcomings of traditional bearing bushings, which often use a single material and have poor wear resistance, significantly improving bearing lifespan and structural reliability. 4. Dual-Cage Composite Structure for Balanced Strength and Adaptability: The fixed cage is made of integral metal, ensuring high rigidity and reliable positioning to meet heavy-load, high-strength operating conditions. The movable, split cage features a separate design, facilitating processing and allowing for localized micro-adjustments to accommodate various assembly errors. The combination of these two structures covers all application scenarios. 5. Dual-Rail Micro-Adjustment Structure for High Assembly Error Tolerance: The rigid fixed track ensures accurate positioning and load-bearing strength, while the movable track has adaptive adjustment capabilities to compensate for processing and assembly deviations. This solves the problems of difficult alignment and lack of adjustment margin in traditional bearings, significantly improving assembly convenience. 6. Precisely proportioned dimensions ensure extremely low friction loss. All core components are precisely matched in diameter, resulting in perfectly synchronized linear velocity and revolution radius during operation. This eliminates relative sliding friction between components, reducing operating temperature rise and wear, and making it suitable for long-term, high-speed, continuous operation. 7. Dual-mode assembly + integrated sealing provides superior overall performance. The limit baffle allows for flexible switching between two installation modes to adapt to different installation spaces and load conditions. The baffle integrates a comprehensive sealing structure, effectively isolating external impurities and improving the bearing's environmental adaptability under harsh conditions. Structural versatility and protection are significantly enhanced. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the overall front view of the bearing structure of the present invention; Figure 2 This is a schematic diagram of the limiting baffle of the present invention (including front view and side view). Figure 3 This is a schematic diagram of the structure of the outer ring and inner ring of the movable track positioning of the present invention; Figure 4 This is a schematic diagram of the structure of the bushing-type isolator of the present invention (including views of the bushing-type isolator, movable bushing, and mandrel). Explanation of reference numerals in the attached figures

[0008] 1-Bearing outer ring, 2-Main roller (carrying rolling element), 3-Sleeve type isolator (sleeve type isolator assembly), 4-Location groove inner ring, 5-Fixed track, 6-Movable track positioning outer ring, 7-Movable track positioning inner ring, 8-Bearing inner ring, 9-Bearing baffle (limiting baffle), 10-Location groove (track groove), 11-Sleeve (movable shaft sleeve), 12-Core (mandrel). Detailed Implementation

[0009] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. The described embodiments are only preferred embodiments of the present invention and not all embodiments. All embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative labor are within the protection scope of the present invention.

[0010] Example 1: Heavy-duty cylindrical roller bearing operation (with baffle fixed outer ring). This example discloses a heavy-duty track-type rolling isolating bearing. The main rollers are cylindrical rollers, including an outer ring, an inner ring, main rollers, a limiting baffle, a track assembly, and an isolating cage assembly. In this example, the limiting baffle is fixedly installed inside the outer ring of the bearing, and the isolating cage assembly is eccentrically assembled at the lower position of the center line of two adjacent sets of main rollers. During bearing operation, the inner ring track serves as the main positioning and guiding structure, with the outer track providing auxiliary limiting. The movable bushing of the movable split isolating cage is made of brass, which is wear-resistant, pressure-resistant, and high-temperature resistant, suitable for heavy-duty impact conditions. The spindle is made of high-hardness bearing steel. All components are matched in a preset ratio to ensure synchronous operation without relative slippage. The fixed track ensures overall positioning strength, while the movable track adapts to assembly errors. The limiting baffle seals both ends of the bearing, forming a sealed protective structure to prevent dust and oil from entering. This example is suitable for heavy-duty medium- and high-speed transmission conditions in metallurgical and heavy-duty equipment.

[0011] Example 2: High-speed silent spherical roller bearing operation (baffle fixed inner ring). In this example, the main rollers are spherical rollers, which can be made of steel, ceramic, or high-hardness wear-resistant plastic materials, suitable for high-speed, silent, and insulated transmission scenarios. The limiting baffle is fixedly installed on the outside of the bearing inner ring, and the isolation cage assembly is eccentrically assembled at the upper position of the center line of the two adjacent sets of main rollers. During operation, the outer track is the main positioning reference, and the inner track assists in positioning. The movable bushing is made of wear-resistant nylon plastic, which is lightweight, has a low coefficient of friction, low operating noise, and is corrosion-resistant; the overall structure achieves zero-slip synchronous operation through dimensional matching. The movable track can be slightly adaptively adjusted to compensate for the machining tolerance of the miniature bearing, improving assembly accuracy and running stability. This example is suitable for civilian transmission, precision equipment, high-speed light-load automated equipment, and ceramic high-speed bearing operation.

[0012] Example 3: Universal Wear-Resistant Adaptable to Various Working Conditions (Dual-Mode Switching of Alloy Material). This example is a universal track-type rolling isolating bearing. The main rollers can be selected from cylindrical rollers, spherical rollers, or tapered rollers. The rolling element material is compatible with steel, plastic, and ceramic. The movable bushing is made of wear-resistant alloy material, taking into account wear resistance, impact resistance, and corrosion resistance, and can be adapted to most complex industrial working conditions. This bearing supports free switching between two modes: Under heavy load and impact conditions, the limit baffle is fixed to the outer ring of the bearing, the lower part of the isolation component is eccentrically assembled, and the inner track is the main positioning; under high-speed, precision, and insulation conditions, the limit baffle is fixed to the inner ring of the bearing, the upper part of the isolation component is eccentrically assembled, and the outer track is the main positioning. The dual track structure and dimensional coordination design ensure that there are no slippage, movement, or frictional heating problems in either assembly mode. The baffle integrated sealing structure can adapt to humid and dusty environments, making it extremely versatile.

Claims

1. A track-type rolling isolating bearing, characterized in that: The bearing assembly includes an outer ring, an inner ring, main rollers, limiting baffles, a track assembly, and a retainer assembly. The main rollers are evenly arranged in a ring between the raceways of the outer and inner rings. A retainer assembly is installed between each pair of adjacent main roller sets. The track assembly includes a fixed track and a movable track. The retainer assembly includes a fixed retainer and a movable split retainer. The limiting baffles can be selectively fixed to either the inner side of the outer ring or the outer side of the inner ring, forming two assembly positioning modes. The movable split retainer consists of a spindle and a movable bushing. The movable bushing is made of any wear-resistant material selected from brass, wear-resistant alloy, or wear-resistant nylon plastic. The spindle is made of bearing steel. The fixed retainer is a one-piece metal structure. The main rollers are any of cylindrical rollers, spherical rollers, or tapered rollers, compatible with rolling elements made of steel, ceramic, or high-hardness wear-resistant plastic. The retainer is adapted to the main roller structure; the limiting baffle has a track groove that matches the track assembly, and the two ends of the mandrel of the isolation retainer are limited and locked in the track groove. The limiting baffle has radial, axial, and circumferential limiting and sealing protection functions; each component adopts a diameter ratio matching design: when the limiting baffle is fixed to the outer ring of the bearing, the ratio of the inner diameter of the bearing outer ring raceway to the outer diameter of the inner track inner ring is equal to the ratio of the outer diameter of the isolation retainer outer ring to the outer diameter of the mandrel outer ring; when the limiting baffle is fixed... When the bearing is in the inner ring, the ratio of the outer diameter of the inner ring raceway to the inner diameter of the outer track is equal to the ratio of the outer diameter of the bushing to the outer diameters at both ends of the shaft. The bearing adopts an eccentric assembly and a primary and secondary track structure: when the limiting baffle is fixed to the outer ring of the bearing, the isolation cage assembly is located below the center line of the adjacent main rollers, with the inner ring track as the primary and the outer track as the secondary for positioning; when the limiting baffle is fixed to the inner ring of the bearing, the isolation cage assembly is located above the center line of the adjacent main rollers, with the outer track as the primary and the inner track as the secondary for positioning.

2. The track-type rolling isolating bearing according to claim 1, characterized in that: The fixed track is a reference rigid limiting structure that bears the main positioning load, with high positioning accuracy and strong load-bearing capacity; the movable track has reserved movable margin, which can adapt to machining errors and assembly gaps, and improve the assembly fault tolerance rate.

3. The track-type rolling isolating bearing according to claim 1, characterized in that: The sealing structure of the limiting baffle can prevent external dust, water vapor, and solid impurities from entering the bearing, thus achieving dustproof and waterproof protection.

4. The track-type rolling isolating bearing according to claim 1, characterized in that: The movable split isolation retainer is a split assembly structure that allows for local dimensional adjustments to accommodate different assembly gaps; the fixed isolation retainer is an integral rigid structure that ensures the stability of the bearing during high-speed, heavy-load operation.

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