Multidirectional roller bearing
Patent Information
- Application Number
- CN202522421758.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-14
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-14
AI Technical Summary
Existing composite rolling bearings have complex structures when subjected to radial and axial loads, are prone to failure and jamming due to lack of lubrication, are inconvenient to maintain, and are difficult to meet the multi-directional load requirements of engineering machinery and automated production lines.
A multi-directional roller bearing was designed, including a main roller bearing, side roller bearings and a fixed bracket. It adopts a lubrication system of grease reservoir and grease block. A uniform oil film is formed by rotating the bracket. Combined with an arc plate and sealing components, the lubrication effect and structural stability are ensured.
It achieves stable operation under bidirectional load variations, reduces transmission noise, extends service life, simplifies maintenance, adapts to high-frequency operation scenarios, and reduces equipment downtime.
Smart Images
Figure CN224932063U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a multi-directional roller bearing. Background Technology
[0002] In the field of mechanical manufacturing, traditional roller bearings are one of the basic transmission components, widely used in conveyor rollers, heavy machine tool spindles, metallurgical rolling mills, and other scenarios. Their core advantage lies in their optimized raceway structure, which can stably withstand large radial forces and maintain transmission accuracy even under continuous high-load operation, ensuring the basic operation of various heavy equipment. However, when the application shifts to planetary supports in engineering machinery (such as the slewing mechanisms of excavators and cranes) and automated production lines (such as automotive welding lines and precision assembly lines for electronic components), the limitations of traditional roller bearings become apparent. In these scenarios, the operation of components not only needs to withstand radial loads but also generates continuous axial thrust or impact due to the linkage of mechanisms. Planetary supports may experience axial movement during transmission, and the robotic arm joints and precision transmission units in automated lines must simultaneously meet the requirements of radial centering and axial positioning. Therefore, multi-directional roller bearings have emerged. Existing composite rolling bearings typically include a main roller bearing, side roller bearings, and a fixed bracket. The fixed bracket is mounted on the end face of the inner ring of the main roller bearing. The inner ring of the side roller bearing is a spindle, which is mounted on the fixed bracket and installed on the end face of the main roller bearing along with the fixed bracket. This allows the main roller bearing to bear radial loads, while the side roller bearings bear axial loads. However, the existing composite rolling bearing structure is complex, making it prone to lubrication issues, especially at the side roller bearing location, which can easily lead to failure and jamming, affecting the structure's performance. Furthermore, the existing structure is inconvenient to maintain, hindering its widespread use. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a multi-directional roller bearing with a simple structure that is closer to actual working conditions, thus fulfilling the rigidity measurement requirements of the water pump shaft bearing assembly under different loads.
[0004] To achieve the above objectives, this utility model provides a multi-directional roller bearing, including a main roller bearing, side roller bearings, and a fixed bracket. The fixed bracket is connected to the inner ring end face of the main roller bearing. The inner ring of the side roller bearing is configured as a spindle. Two arc-shaped plates are spaced apart on the fixed bracket, and through holes are opened at the center of each of the two arc-shaped plates. The two ends of the spindle are rotatably connected to the two through holes, forming a square channel between the two arc-shaped plates. A square hole with a shape and size adapted to the square channel is opened at the center of the fixed bracket. The outer ring of the side roller bearing is exposed outside the square hole. A separation gap is formed between the main roller bearing and the side roller bearing. A fastening post is provided on the fixed bracket at the position corresponding to the separation gap. One end of the fastening post inserted into the separation gap is rotatably engaged with a rotating bracket. A grease reservoir is provided on the outer peripheral wall of the rotating bracket, and a grease block is accommodated at the center of the rotating bracket. The end of the spindle abuts against the grease reservoir.
[0005] The beneficial effects of this design are as follows: when the rotating bracket rotates synchronously with the spindle, the grease reservoir always adheres to the outer circumference of the spindle, and the grease blocks slowly seep out through the reservoir, forming a uniform oil film on the mating surface between the spindle and the through hole. This not only avoids wear and heat caused by dry friction, but also buffers the impact vibration of the spindle under axial load. It is especially suitable for high-frequency operation scenarios in automated production lines, effectively reducing transmission noise and extending the service life of the side roller bearings. When the grease reservoir ages or the grease blocks are depleted, there is no need to disassemble the main roller bearing or the fixed bracket; simply unscrew the fastening column to replace the rotating bracket assembly, significantly reducing equipment downtime. The improved lubrication effect makes the side roller bearings more adaptable to axial load fluctuations. Combined with the radial load-bearing capacity of the main roller bearing, the bearings can still maintain stable operation under bidirectional load changes.
[0006] As a further feature of this invention, a raised section is provided at the center of the end of the mandrel, and the edge of the raised section is connected to the edge of the mandrel through a smooth curved surface.
[0007] The beneficial effects of this design are as follows: the raised design at the end of the mandrel can actively guide the diffusion of grease: the grease seeping from the grease reservoir will first gather at the top of the raised area, and then flow naturally along the smooth curved surface to the mating surface between the mandrel and the through hole, avoiding grease accumulation at the end edge and ensuring that every contact point on the outer periphery of the mandrel is covered by an oil film; the uniform distribution of grease can reduce the rotational resistance of the mandrel, reduce frictional heat during operation, and allow the side roller bearing to maintain a stable speed even under high-frequency start-stop conditions.
[0008] As a further feature of this invention, the raised section is provided with a plurality of oil guide grooves, one end of which is located on the raised section and the other end is diffracted onto the outer peripheral wall of the mandrel.
[0009] The beneficial effects of this design are as follows: the oil guide groove on the raised section forms a directional grease transmission channel, allowing the grease seeping from the grease reservoir to quickly fill the groove and flow precisely from the top of the raised section to the outer peripheral wall of the mandrel along the oil guide groove. This prevents grease from accumulating or flowing randomly at the raised section. Furthermore, the oil guide groove can guide excess grease, preventing localized oil accumulation from increasing the rotational resistance of the mandrel and ensuring that a continuous and uniform oil film is formed on the mating surface between the mandrel and the through hole.
[0010] As a further feature of this invention, the main roller bearing includes a main outer ring, a main inner ring, and a plurality of main rollers, wherein the plurality of main rollers are disposed between the main inner ring and the main outer ring, and the fixed bracket is bolted to the end face of the main inner ring, and the outer side of the end face of the main outer ring is chamfered; the side roller bearing includes a side outer ring and a plurality of side rollers, wherein the plurality of side rollers are disposed between the side outer ring and the spindle, wherein the length of the side outer ring is less than the length of the spindle.
[0011] The beneficial effects of this design are as follows: The chamfered design on the outer edge of the main outer ring reduces the impact with protrusions or depressions in the track when rolling on uneven surfaces, preventing jamming. Simultaneously, the chamfer actively avoids obstacles such as dust and metal debris at the track joints, preventing impurities from obstructing rotation. The larger wall thickness of the main outer ring enhances radial load-bearing rigidity, making it suitable for heavy-load scenarios and resistant to deformation even under long-term heavy rolling forces. Its double-edge structure bidirectionally restricts the main roller offset and prevents relative movement between the main inner and outer rings, ensuring transmission accuracy. In the side roller bearing, the spindle is connected to a fixed bracket for stable support. The side outer ring is shorter than the spindle, avoiding interference between the two ends of the side outer ring and the inner wall of the curved plate, ensuring flexible rotation of the side outer ring within the square hole and precise axial load bearing.
[0012] As a further feature of this invention, sealing components are provided between the main inner ring and the main outer ring, and between the side outer ring and the mandrel.
[0013] The beneficial effects of this design are as follows: By adding sealing components between the main inner ring and the main outer ring, and between the side outer ring and the spindle, the mud, sand, coolant, metal debris, and dust from the automated production line environment during the operation of the engineering machinery can be effectively prevented from entering the bearing. At the same time, it prevents the grease in the raceway from leaking due to rotation, thus avoiding dry friction wear caused by lubrication failure. Attached Figure Description
[0014] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the fixed bracket in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the mandrel structure in an embodiment of the present invention; Figure 4 This is a schematic diagram of the fastening column in an embodiment of the present invention. Detailed Implementation
[0015] This utility model provides an embodiment of a multi-directional roller bearing, such as... Figures 1 to 4 As shown, the device includes a main roller bearing 1, a side roller bearing 2, and a fixed bracket 3. The fixed bracket 3 is connected to the inner ring end face of the main roller bearing 1. The inner ring of the side roller bearing 2 is configured as a spindle 21. Two arc-shaped plates 31 are spaced apart on the fixed bracket 3. Each arc-shaped plate 31 has a through hole at its center. The two ends of the spindle 21 are rotatably connected to the two through holes, forming a square channel between the two arc-shaped plates 31. A square hole 32 with a shape and size adapted to the square channel is opened at the center of the fixed bracket 3. The outer ring of the side roller bearing 2 is exposed outside the square hole 32. A separation gap is formed between the main roller bearing 1 and the side roller bearing 2. A fastening post 4 is provided on the fixed bracket 3 at the position corresponding to the separation gap. One end of the fastening post 4 is inserted into the separation gap and rotatably engaged with a rotating bracket 41. A grease reservoir 42 is provided on the outer peripheral wall of the rotating bracket 41. A grease block is accommodated in the center of the rotating bracket 41. The end of the spindle 21 abuts against the grease reservoir 42. The beneficial effects of this design are as follows: When the rotating bracket 41 rotates synchronously with the spindle 21, the grease reservoir 42 always adheres to the outer circumference of the spindle 21. The grease blocks slowly seep out through the reservoir body, forming a uniform oil film on the mating surface between the spindle 21 and the through hole. This not only avoids wear and heat caused by dry friction, but also buffers the impact vibration of the spindle 21 under axial load. It is especially suitable for high-frequency operation scenarios in automated production lines, effectively reducing transmission noise and extending the service life of the side roller bearing 2. When the grease reservoir 42 ages or the grease blocks are exhausted, there is no need to disassemble the main roller bearing 1 or the fixed bracket 3. The rotating bracket 41 assembly can be replaced simply by unscrewing the fastening column 4, which greatly reduces equipment downtime. The improved lubrication effect makes the side roller bearing 2 more adaptable to axial load fluctuations. Combined with the radial load-bearing capacity of the main roller bearing 1, the bearing can still maintain stable operation under bidirectional load changes.
[0016] As a further feature of this embodiment, a raised section 211 is provided at the center of the end of the mandrel 21, and the edge of the raised section 211 is connected to the edge of the mandrel 21 through a smooth curved surface. The beneficial effects of this feature are as follows: the raised section 211 at the end of the mandrel 21 can actively guide the diffusion of grease: the grease seeping from the grease reservoir 42 will first gather at the top of the raised section 211, and then flow naturally along the smooth curved surface to the mating surface between the mandrel 21 and the through hole, avoiding grease accumulation at the end edge and ensuring that every contact point on the outer periphery of the mandrel 21 is covered by an oil film; the uniform distribution of grease can reduce the rotational resistance of the mandrel 21, reduce frictional heat during operation, and allow the side roller bearing 2 to maintain a stable speed even under high-frequency start-stop conditions.
[0017] As a further feature of this embodiment, the raised section 211 is provided with a plurality of oil guide grooves 212. One end of each oil guide groove 212 is located on the raised section 211, and the other end is diffused to the outer peripheral wall of the mandrel 21. The beneficial effect of this configuration is that the oil guide grooves 212 on the raised section 211 form a directional grease transport channel. The grease seeping from the grease reservoir 42 will quickly fill the grooves and flow precisely from the top of the raised section 211 to the outer peripheral wall of the mandrel 21 along the oil guide grooves 212, preventing grease from accumulating or flowing randomly at the raised section 211. Furthermore, the oil grooves can guide excess grease, preventing local oil accumulation from increasing the rotational resistance of the mandrel 21, and ensuring that a continuous and uniform oil film is formed on the mating surface between the mandrel 21 and the through hole.
[0018] As a further feature of this embodiment, the main roller bearing 1 includes a main outer ring 11, a main inner ring 12, and a plurality of main rollers 13, which are disposed between the main inner ring 12 and the main outer ring 11. The fixed bracket 3 is bolted to the end face of the main inner ring 12, and the outer side of the end face of the main outer ring 11 is chamfered. The side roller bearing 2 includes a side outer ring 22 and a plurality of side rollers 23, which are disposed between the side outer ring 22 and the spindle 21, wherein the length of the side outer ring 22 is less than the length of the spindle 21. The beneficial effects of this configuration are: the chamfer design on the outer side of the end face of the main outer ring 11 can reduce the hard impact with the protrusions or depressions of the track when rolling on uneven tracks by transitioning through the inclined surface, thus avoiding jamming; at the same time, the inclined surface can actively avoid obstacles such as dust and metal debris at the track joints, preventing impurities from jamming and affecting rotation. The larger wall thickness of the main outer ring 11 enhances radial load-bearing rigidity, making it suitable for heavy-load scenarios and resistant to deformation even under long-term heavy rolling forces. Its double-flange structure can restrict the offset of the main roller 13 in both directions and prevent relative movement between the main inner ring 12 and the outer ring, ensuring transmission accuracy. In the side roller bearing 2, the spindle 21 is connected to the fixed bracket 3 for stable support. The length of the side outer ring 22 is less than that of the spindle 21, which avoids interference between the two ends of the side outer ring 22 and the inner wall of the arc plate 31, ensuring that the side outer ring 22 can rotate flexibly within the square hole 32 and accurately bear axial loads.
[0019] As a further provision of this embodiment, sealing components are respectively provided between the main inner ring 12 and the main outer ring 11, and between the side outer ring 22 and the spindle 21. The beneficial effect of this provision is that by adding sealing components between the main inner ring 12 and the main outer ring 11, and between the side outer ring 22 and the spindle 21, the mud, sand, coolant, and metal debris and dust from the automated production line environment during the operation of the engineering machinery can be effectively prevented from entering the bearing. At the same time, it prevents the grease in the raceway from leaking due to rotation, thus avoiding dry friction wear caused by lubrication failure.
[0020] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.
Claims
1. A multi-directional roller bearing, comprising a main roller bearing, side roller bearings, and a fixed bracket, wherein the fixed bracket is connected to the inner ring end face of the main roller bearing, and the inner ring of the side roller bearing is configured as a spindle, characterized in that: Two arc-shaped plates are spaced apart on the fixed bracket, and a through hole is opened at the center of each of the two arc-shaped plates. The two ends of the mandrel are respectively rotatably connected to the two through holes, forming a square channel between the two arc-shaped plates. A square hole with a shape and size adapted to the square channel is opened at the center of the fixed bracket. The outer ring of the side roller bearing is exposed outside the square hole. A separation gap is formed between the main roller bearing and the side roller bearing. A fastening post is provided on the fixed bracket at the position corresponding to the separation gap. One end of the fastening post is inserted into the separation gap and rotatably engaged with a rotating bracket. A grease reservoir is provided on the outer peripheral wall of the rotating bracket. A grease block is accommodated in the center of the rotating bracket. The end of the mandrel abuts against the grease reservoir.
2. The multi-directional roller bearing according to claim 1, characterized in that: The mandrel end has a raised center, and the edge of the raised center is connected to the edge of the mandrel through a smooth curved surface.
3. The multi-directional roller bearing according to claim 2, characterized in that: The raised section is provided with several oil guide grooves, one end of which is located on the raised section and the other end is diffracted onto the outer peripheral wall of the mandrel.
4. The multi-directional roller bearing according to claim 1, characterized in that: The main roller bearing includes a main outer ring, a main inner ring, and a plurality of main rollers, the plurality of main rollers being disposed between the main inner ring and the main outer ring. The fixed bracket is bolted to the end face of the main inner ring, and the outer side of the end face of the main outer ring is chamfered. The side roller bearing includes a side outer ring and a plurality of side rollers, the plurality of side rollers being disposed between the side outer ring and the spindle, wherein the length of the side outer ring is less than the length of the spindle.
5. The multi-directional roller bearing according to claim 4, characterized in that: Sealing components are respectively provided between the main inner ring and the main outer ring, and between the side outer ring and the mandrel.