Multi-track, interchangeable repair, split self-locking rolling bearing base

Abstract

The application discloses a multi-track replaceable repair split self-locking rolling bearing base, which comprises a ring-shaped base assembly formed by splicing and surrounding two groups of half-ring-shaped bases; the half-ring-shaped base is vertically fastened by an inner shell and an outer shell, and after filling rolling bodies, the half-ring-shaped base is opened to form a rotary motion gap by relying on the rolling body support. The base is provided with at least two groups of multifunctional shared arc-shaped cavities, which can be used as rolling body working cavities, lubricating cavities or cooling cavities as required. The two half bases are matched by tenon-and-mortise insertion and are locked by screws; the single-side base unit is provided with high-low step structure, which forms a main shaft avoiding gap and can support the base to independently rotate. The cavity bodies of the groups of cavities are mutually t-separated, the rotary gaps are mutually communicated, the adjacent cavities are axially arranged in a staggered mode, and the rolling track curved surface is radially tangent to the rolling body diameter at a height of 47.0% to 47.7%. The multiple rolling tracks can be replaced to work, the standby track is switched after the track wear failure, the larger diameter rolling body can be replaced to compensate the gap after all the tracks are worn out, the base is repaired and reused, the rotary gap can be filled with lubricating medium to realize grease storage and dust prevention, and the outer fastening layer of the base can be selected. The application is convenient to assemble and maintain.

Description

Technical Field

[0001] This invention relates to the field of rotary support mechanical components, and in particular to a multi-track, replaceable, repairable, split self-locking rolling bearing base. Background Technology

[0002] Split-type multi-track rolling bearing bases are the core load-bearing and rotational support components of mechanical rotary support equipment, widely used in various rotary transmission and load-bearing support machinery. Currently, conventional split-type multi-track bearing bases on the market have several inherent technical defects in structural design, mold processing, assembly precision, load-bearing capacity, manufacturing process, lubrication and maintenance, sealing and dust prevention, repair and reuse, and integrated performance. These defects make it difficult to meet the industrial application requirements of high precision, high stability, long lifespan, low noise, and reusable maintenance. Specific technical defects are detailed below: Firstly, existing ring-shaped support bases often employ differentiated structural designs for their two semi-ringed bases, requiring two separate sets of molds for each. This dual-mold production model introduces inherent mold manufacturing tolerances, leading to dimensional deviations between the two semi-ringed bases and the assembly reference. This results in misalignment, uneven clearances, and poor assembly accuracy compared to mass production. Furthermore, the dual-mold development and maintenance, along with the separate processing, significantly increases production and manufacturing costs, hindering large-scale mass production and adoption.

[0003] Secondly, the raceways of multi-track bearing housings naturally exhibit differences in their radii of rotation, a characteristic inherent to multi-track bearings. However, existing multi-track bearing housings lack standardized arc-shaped cavity axial misalignment structures adapted to multi-radius layouts, and also lack precise matching structures for the radial tangential overlap height of the raceway cross sections. Given the conventional structure with inconsistent radii of rotation across raceways, existing structures cannot achieve synchronous full-load arrangement of rolling elements of the same specification across multiple tracks, inevitably leaving excess clearance between the rolling element groups of each track. During equipment operation, this easily leads to overall ball movement and relative slippage, resulting in uneven overall bearing load distribution, significant differences in wear rate and amount across raceways, and a substantial reduction in the overall bearing capacity and operational stability.

[0004] Thirdly, the traditional split-type bearing base has a chaotic and disordered layout of the inner and outer shell parting joints. The angles of the shell splitting slopes corresponding to each raceway are independent and lack a unified design standard. This is a passive and outdated structure adapted to single-track independent contact angles and old processing equipment. This structure requires multiple changes of tooling fixtures and repeated positioning and clamping during processing, resulting in cumbersome procedures, low production efficiency, and difficulty in ensuring consistent dimensional and positional tolerances for batch products. Furthermore, existing bases rely solely on independent openings for oil injection, failing to achieve integrated medium filling through the shell mating surfaces. The cavity cannot be fully filled, leading to uneven distribution of lubricating and cooling media. Long-term operation results in rapid lubricant loss, frequent oil replenishment and maintenance, and localized lubrication and heat dissipation blind spots, making it unsuitable for long-term stable operation under high-speed and medium-load conditions.

[0005] Fourth, the existing bearing base cavity structure design is fixed, with each raceway and rolling element having a fixed matching structure. There is no structure designed to repair and adapt the bearing after raceway wear, nor is there a structural basis for compensating for wear clearance by replacing large-diameter rolling elements. When the wear of the raceway exceeds the service threshold, the base cannot be repaired and reused, and must be scrapped and replaced as a whole, resulting in high equipment maintenance costs and low utilization rate of parts resources.

[0006] Fifth, conventional split-type multi-track bearing bases lack a raceway opening and closing self-locking structure and a targeted axial anti-movement limiting mechanism. When the equipment is subjected to rotational vibration and radial and axial loads, the rolling element assembly is prone to axial displacement, resulting in poor support and positioning stability. Due to the spatial constraints of the inner shell, conventional solutions cannot accommodate a purely radial clamping structure; most solutions rely on a single limiting method, lacking multiple constraint coordination, which can easily lead to spindle positioning deviations and reduce the equipment's rotational accuracy over long-term operation.

[0007] Sixth, the rotational clearance formed by the interlocking of the inner and outer shells of the traditional base is only used as a rotational clearance space and is not designed with a sealing and dustproof function. This clearance has no medium-filled sealing structure, and external dust and particulate impurities can easily enter the cavity. At the same time, the internal lubricating medium can easily leak out. These two problems accelerate the wear and aging of the raceway and rolling elements, significantly shortening the bearing service life and the reliability of equipment operation.

[0008] Seventh, the existing bearing base's track layout, full-load adaptation, self-locking limit, and wear repair functions are all independently designed, with no coupling or linkage between the structures. It is impossible to form an integrated structure with switchable cavity functions based on a multi-track layout. The functions of a single structure are scattered and have weak adaptability, making it impossible to achieve structural linkage and efficiency enhancement. The overall performance is singular, making it difficult to adapt to stable operation in multiple scenarios and long-term high-load conditions.

[0009] Eighth, due to limitations in the existing overall structural design, traditional multi-raceway bearings cannot achieve a full filling of rolling elements, resulting in persistent clearances within the cavity. During bearing rotation under load, these clearances can cause ball misalignment and slight impacts, leading to consistently high bearing noise levels and failing to meet the low-noise operation requirements of precision rotary equipment. Summary of the Invention

[0010] The technical problem to be solved by the present invention To address the numerous technical problems of existing split-type multi-track rolling bearing bases, including high mold investment costs, poor assembly consistency, difficulty in achieving full loading of rolling elements of the same specification due to multiple turning radius tracks, uneven load distribution, unreasonable housing slot design, complex processing procedures, and difficulties in media filling, difficulty in repairing the base after wear, requiring complete scrapping, easy axial movement of rolling elements, limited limiting methods, poor dustproof sealing, independent functional structures without coupling and linkage, and abnormal noise caused by ball clearance, this invention provides a multi-track replaceable and repairable split self-locking rolling bearing base that overcomes all the above-mentioned defects. To address the eight inherent defects in existing technologies, this invention provides a multi-track, replaceable, repairable, split-type self-locking rolling bearing base. Through a one-to-one corresponding structural design, it achieves full coverage of defects and complete structural matching. The specific solution is as follows:

[0011] Corresponding to background defect one (dual molds, poor assembly, high cost) The annular base assembly of this invention is composed of two sets of identical, completely interchangeable semi-annular bases symmetrically assembled. The left and right semi-annular bases have completely identical shapes, dimensions, and assembly benchmarks, requiring only one set of molds for mass production. This design eliminates processing errors caused by two sets of molds, ensures precise assembly alignment, improves the consistency of batch products, effectively reduces mold development and overall manufacturing costs, and is suitable for large-scale mass production.

[0012] [Corresponding to background defect 2 (multi-radius tracks cannot be fully loaded with balls of the same specification, resulting in uneven load and inconsistent wear)] This invention employs a multi-track axially staggered cavity layout combined with a precisely matched structure where the raceway cross-sections are radially tangent and overlap. This allows multiple sets of tracks with different radii of rotation to be accommodated with rolling elements of the same specification, ensuring synchronous full-load arrangement. This eliminates excess clearance between the balls on each track, preventing ball slippage and movement. It achieves uniform load distribution across multiple tracks, resulting in more even wear on each raceway and effectively improving the overall load-bearing stability of the base.

[0013] Corresponding to background defect three (disorganized seams, cumbersome tooling, poor lubrication, frequent oil replenishment, and poor heat dissipation and lubrication). This invention standardizes the shell splitting bevel angles and parting seam layouts corresponding to all raceways, eliminates disordered independent bevel structures, unifies clamping benchmarks, reduces tooling change frequency, improves processing efficiency, and ensures stable dimensional and positional tolerances for batch products. Simultaneously, it eliminates dispersed independent oil injection holes, utilizing the mating surface formed by the interlocking of the inner and outer shells to create an integrated media filling channel. This enables full filling of the cavity with lubricating grease and cooling media, ensuring uniform media distribution and preventing leakage, extending the oil replenishment and maintenance cycle, eliminating localized lubrication and heat dissipation blind spots, and adapting to high-speed, medium-load, long-term continuous operating conditions.

[0014] Corresponding to background defect four (unrepairable, can only be scrapped, high maintenance costs) This invention features a multi-track shared cavity structure that can be rotated for repair. During operation, different track cavities are used alternately to bear the load, evenly distributing wear. When the raceway wear reaches its service limit, larger diameter rolling elements are replaced to compensate for the wear clearance and restore the original bearing fit accuracy. The base can be repaired and reused multiple times without the need for complete scrapping, reducing equipment maintenance costs and improving material utilization.

[0015] Corresponding to background defect five (no axial self-locking, ball bearing movement, limited limit mechanism, poor precision). This invention features a raceway-type opening and closing interlocking self-locking structure at the ends of each arc-shaped cavity. Relying on the engagement between the housing contour and the rolling elements, a natural axial self-locking constraint is formed, limiting the axial movement and displacement of the rolling element assembly. Simultaneously, the base is equipped with a slanted threaded tightening hole structure, which, in conjunction with the spindle adjustment mechanism, tightens the inner housing and the spindle. These two structures work together to form a dual axial limiting system, enhancing anti-displacement capability and ensuring stable long-term rotational positioning accuracy of the equipment.

[0016] Corresponding to background defect six (no dustproofing for rotational clearance, easy for dust to enter, oil leakage, and short lifespan). This invention functionalizes the rotational clearance formed by the interlocking of the inner and outer shells, allowing for the pre-positioning, filling, and sealing of lubricating media to form a media-sealing barrier layer. By using the media to seal the gap, external dust and impurities are prevented from entering the cavity, while simultaneously reducing leakage of internal lubricating media, slowing wear on the raceway and rolling elements, and extending the service life of the base.

[0017] Corresponding to background defect seven (independent functions, lack of coupling, poor integration, and single operating conditions) This invention employs a multi-track shared cavity integrated coupling design, integrating the track arrangement structure, the same-specification full-fill structure, the axial self-locking limiting structure, the wear compensation and repair structure, and the medium reserve lubrication structure into the same base cavity system. Each structure relies on and interacts with the others, allowing for flexible switching of cavity functions: heavy-load conditions are filled with rolling elements for load bearing, while light-load conditions can be filled with various media, adapting to a variety of complex working conditions, including high and low speeds and light and heavy loads.

[0018] Corresponding to background defect eight (insufficient ball bearings, large gaps, loud abnormal noise, poor noise reduction). This invention achieves perfect full-load arrangement of all track rolling elements through an axially misaligned cavity combined with a radially tangential precision matching structure, eliminating residual clearance in the ball assembly and ensuring that the rolling elements abut against each other in pairs. This eliminates mechanical noise caused by ball micro-slippage and mutual impact, achieving low-noise and stable operation of the entire machine and meeting the quiet operation requirements of precision rotary equipment. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the inner cavity of the two end structures of the single-sided half-circle base of the present invention; Figure 2 is an exploded disassembly diagram of the multi-track replaceable repairable split self-locking rolling bearing base of the present invention; Figure 3 is a three-dimensional schematic diagram of the assembled multi-track replaceable repairable split self-locking rolling bearing base of the present invention.

[0020] Reference numerals: 1-Outer shell, 2-Inner shell, 3-Lubricating medium cavity, 4-Cooling medium cavity, 5-Gap between inner and outer shells, 6-Outer fastening layer, 7-Angled locking threaded hole, 8, 9-Annular mating groove, 10, 11-Annular mating tenon, A-Tangential overlap area of ​​adjacent cavity raceways. Detailed Implementation

[0021] The base will be further described in detail below with reference to the accompanying drawings. As shown in Figures 1-3, a multi-track replaceable repairable split self-locking rolling bearing base includes an annular base assembly, which is formed by two independent semi-annular bases symmetrically spliced ​​together; each semi-annular base consists of an inner shell 2 and an outer shell 1 vertically fastened together to form a single-sided semi-circular base unit; after the inner shell 2 and the outer shell 1 are fastened together, rolling elements of suitable specifications are installed, and the rolling elements support and open the gap, thereby forming a rotational movement clearance; at least two sets of arc-shaped cavities are integrally formed inside the base, namely a lubricating medium cavity 3 and a cooling medium cavity 4; cavities 3 and 4 are multi-functional shared cavities without fixed functional distinctions, and the same arc-shaped cavity can be selected as a rolling element working cavity, a lubricating medium storage cavity, or a cooling medium receiving cavity according to the actual working conditions; the inner shell 2 and the outer shell 1 are respectively provided with arc-shaped raceway surfaces.

[0022] The two sets of semi-annular base units are respectively equipped with annular mating grooves 8 and 9 and annular mating tenons 10 and 11 at their joint ends. During assembly, a "fill first, lock later" assembly logic is followed. First, the rolling element and the required medium are loaded into the arc-shaped cavity of the single-sided semi-annular base unit. After loading, the two sets of semi-annular base units are positioned by interlocking the grooves and tenons. The tenon and mortise joints are secured with fixing screws to ensure precise circumferential alignment of the two base units during splicing, preventing misalignment during operation. The outer ring mounting bottom edge of the single-sided semi-annular base unit is higher than the inner ring mounting bottom edge. The outer ring's inner diameter is larger than the inner ring's inner diameter, forming a stepped structure with varying heights. This stepped structure creates clearance between the main shaft and the main shaft, preventing assembly interference. Additionally, when the base is placed independently of the main shaft, the stepped structure provides support, allowing the base to rotate independently.

[0023] The inner and outer shells are separated by rolling elements to form a rotational clearance. This clearance constitutes a medium-accommodating gap. After the lubricating medium is filled into the gap, it can continuously maintain the lubrication conditions of the cavity and prevent external dust from entering the raceway area, achieving a dustproof effect. This rotational clearance is interconnected with the mating surfaces of each cavity, making the overall rotational clearance interconnected and continuous. The main lubricating medium of the base is filled at the shell mating position, and the rotational gap serves as an auxiliary grease storage and dustproof channel.

[0024] This base features a multi-section, structurally equivalent arc-shaped raceway cavity. Each cavity is independently separated and not interconnected, except for the rotational clearance formed by the housing assembly. This allows for the interchangeable operation of multiple raceways. When one raceway experiences prolonged load wear and excessive surface damage, it can no longer effectively support the inner and outer housings, resulting in a loss of standard rotational clearance and problems such as rotational jamming, clearance failure, and reduced load-bearing capacity. In this case, the worn-out raceway can be deactivated, and a spare raceway cavity with intact geometric precision within the base can be used. Through this raceway interchangeability, the bearing base can maintain standard rotational clearance and normal operating accuracy without requiring complete scrapping. Once all raceways have been rotated and reached their wear limit, and no suitable spare raceways are available, larger diameter rolling elements can be installed to compensate for the overall wear of the raceways, effectively opening the housing clearance again and restoring the standard rotational fit. This allows for secondary repair and reuse of the base.

[0025] Two adjacent sets of arc-shaped cavities are staggered along the axial direction, and the adjacent raceway surfaces form a radially overlapping area (as shown by label A in Figure 1). This tangential overlap height is adapted to 47.0% to 47.7% of the rolling element diameter. Relying on the multi-functional shared characteristics of the cavities, each cavity can be selectively filled with rolling elements, cooling media, and lubricating media, realizing zoned operation, zoned cooling, and zoned grease storage, providing a structural basis for multi-track rotation operation and long-term stable operation.

[0026] The outer side of the base can be selectively fitted with a two-part fastening layer 6. The fastening layer wraps around the outer side of the annular base assembly. In heavy-duty conditions, the fastening layer can be added to form radial restraint, while in normal conditions, the assembly can be omitted. The base is provided with an oblique locking thread hole 7. The locking component is assembled along the oblique locking thread hole to press and fix the inner shell and outer shell.

[0027] The axially staggered arrangement of multiple cavities and the tangential height of the raceway sections are matched and coupled with the synchronous full-load structure of each track to form a switchable track layout structure. The rolling elements are installed into the shell mating surface to achieve full-load arrangement inside the cavity. The full-load structure and the raceway opening structure cooperate to form a radial constraint structure and an axial constraint structure. The above structural features are linked and cooperate to form the overall working structure of the base.

[0028] This base adopts a symmetrical split structure with two sets of semi-circular bases having the same shape. They can be manufactured using the same set of molds, reducing mold development costs. The base can be opened to complete the filling of media or rolling elements, track switching maintenance, and rolling element specification replacement, making assembly and maintenance operations convenient.

[0029] Working principle: During assembly, firstly, rolling elements of appropriate specifications and the required medium are loaded into each independent arc-shaped cavity of the single-sided semi-circular base unit; relying on the multi-functional shared cavity design, the functions of each cavity are freely allocated; after loading, the two sets of semi-circular bases are joined together and positioned by mortise and tenon structure and locked with fixing screws to form a complete annular base assembly; the rolling elements support and expand the inner shell and outer shell to form a standard rotation clearance; under heavy load conditions, an additional outer fastening layer can be added for locking and reinforcement.

[0030] During operation, each set of cavities is independently separated, while the overall rotational clearance is interconnected. Multiple sets of cavity tracks can take turns bearing loads and rotating. When one set of raceways is severely worn and cannot effectively open and maintain the standard rotational clearance, it can be switched to another unworn, intact spare raceway to continue working, ensuring that the bearing has qualified rotational accuracy and operating clearance throughout its entire range. When multiple sets of raceways have been used in rotation, all have reached their wear limit, and no intact tracks are available for switching, larger diameter rolling elements can be installed in each cavity. The increased outer diameter of the larger rolling elements compensates for the wear of the raceways, effectively opening the inner and outer shells again, restoring the standard rotational clearance, and enabling the bearing base to be repaired and reused, greatly extending the overall service life of the product. The rotational gap between the inner and outer shells is filled with lubricating medium to continuously maintain a clean working environment for the internal raceways and prevent dust intrusion.

Claims

1. A multi-track, replaceable, repairable, split-type self-locking rolling bearing base, characterized in that, It includes an annular base assembly, which is formed by symmetrically splicing two independent semi-annular bases; each semi-annular base consists of an inner shell and an outer shell vertically fastened to form a single-sided semi-circular base unit, with the rolling elements and cavity medium being loaded through the cavity opening, and the rolling elements being opened after being assembled into place to form a rotational movement gap; at least two sets of arc-shaped cavities are integrally formed inside the base; the inner shell and the outer shell are respectively provided with arc-shaped raceway surfaces.

2. The multi-track replaceable repairable split self-locking rolling bearing base according to claim 1, characterized in that: The two sets of semi-annular bases have a tenon groove positioning structure at the joint end. The inner shell has an axial locking screw mounting position at the joint position, and the outer shell has a radial locking screw mounting position at the joint position. The inner shell and the outer shell adopt a vertically interlocking split assembly structure.

3. The multi-track replaceable repairable split self-locking rolling bearing base according to claim 1, characterized in that: Multiple sets of arc-shaped cavities are arranged in a staggered manner along the axial direction, and the radial tangential overlap height of the raceway sections of two adjacent sets of cavities is 47.0% to 47.7% of the diameter of the matching ball.

4. The multi-track replaceable repairable split self-locking rolling bearing base according to claim 3, characterized in that: The joints between the inner and outer shells corresponding to multiple sets of arc-shaped cavities are uniformly set as the same inclined surface, and the inclined joints penetrate the raceway area. The assembly structure is set so that the rolling elements are filled after the shells are closed.

5. The multi-track replaceable repairable split self-locking rolling bearing base according to claim 1, characterized in that: Multiple sets of arc-shaped cavities are set with different radii of rotation. The contour dimensions of each set of cavities are consistent and they are adapted to rolling elements of the same specification. Each set of cavities is adapted to a full-fill ball arrangement structure.

6. The multi-track replaceable repairable split self-locking rolling bearing base according to claim 1, characterized in that: The arc-shaped cavity can be selectively filled with rolling elements, cooling media, and lubricating media. After the overall wear of each cavity reaches the limit, it can be adapted to use larger diameter balls.

7. The multi-track replaceable repairable split self-locking rolling bearing base according to claim 1, characterized in that: The inner and outer shells of the arc-shaped shared cavity form a limiting configuration by obliquely separated joint seams. The oblique surface fits the arc contour of the cavity to form a self-locking structure. The outer shell is limited by the inner raceway and rolling element locking, forming a bidirectional axial constraint structure between the shell and the rolling element.

8. The multi-track replaceable repairable split self-locking rolling bearing base according to claim 1, characterized in that: The base body sidewall is provided with oblique threaded holes, which are matched with a spindle adjustment device. Threaded connectors lock the inner housing and the spindle.

9. The multi-track replaceable repairable split self-locking rolling bearing base according to claim 1, characterized in that: The outer ring mounting base of the single-sided semi-circular base unit is higher than the inner ring mounting base, and the inner diameter of the outer ring is larger than the inner diameter of the inner ring, forming a stepped structure.

10. The multi-track replaceable repairable split self-locking rolling bearing base according to claim 1, characterized in that: After the inner and outer shells are assembled, a rotational clearance is formed. The rotational clearance forms a medium-accommodating gap. After the gap is filled with lubricating medium, a dustproof mating structure is formed.

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