High-bearing one-piece bearing for limited space

Abstract

The utility model discloses a high bearing capacity conjoined bearing for limited space, which comprises a bearing outer ring, a bearing inner ring solid shaft and a rolling body, the inner side of the bearing outer ring is provided with a steel ball outer raceway and a cylindrical roller outer raceway, and the steel ball outer raceway and the cylindrical roller outer raceway are arranged in parallel; a steel ball inner raceway corresponding to the steel ball outer raceway is arranged on the outer side of the bearing inner ring solid shaft; cylindrical roller inner raceways corresponding to the cylindrical roller outer raceways are arranged on the outer side of the bearing inner ring solid shaft; the rolling bodies are positioned between the steel ball outer raceways and the steel ball inner raceways as well as between the cylindrical roller outer raceways and the cylindrical roller inner raceways; according to the ball bearing, the characteristics of high rotating speed and low friction torque of the ball bearing are reserved, large axial loads can be borne, accurate positioning can be achieved, and the radial bearing capacity is remarkably improved through the design of the full complement needle rollers; and meanwhile, due to the integrated structural design, the bearing has a compact radial size and is suitable for the requirement in a limited space.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bearing technical field, especially a kind of high load connected body bearing for limited space. BACKGROUND

[0002] In mechanical design and engineering applications, bearings are key components that support the rotational motion of machinery, and their performance directly affects the load-carrying capacity, precision, and lifespan of the equipment. With the rapid development of precision machinery, industrial robots, new energy vehicles, and gearboxes for reducers, mechanical equipment is trending towards miniaturization, lightweight, and high performance, which poses higher requirements on bearing design, especially the realization of high load-carrying capacity in limited space.

[0003] Traditional bearing designs, such as single-row ball bearings, needle bearings, double-row ball bearings, and double-row angular contact ball bearings, excel in individual aspects but have limitations when simultaneously meeting the demands of high radial and axial load-carrying capacity in limited space. SUMMARY

[0004] The summary section of the present application is intended to introduce the concepts in a simplified form, which will be described in detail in the detailed description section. The summary section of the present application is not intended to identify key or essential features of the claimed technical solution nor is it intended to limit the scope of the claimed technical solution.

[0005] The utility model discloses a kind of high load connected body bearings for limited space, which overcomes the deficiencies of the prior art.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a kind of high load connected body bearing for limited space, including bearing outer ring sleeve, bearing inner ring entity axle and rolling element, the inner side of bearing outer ring sleeve is equipped with steel ball outer raceway and cylindrical roller outer raceway, steel ball outer raceway and cylindrical roller outer raceway are parallelly arranged;The outer side of bearing inner ring entity axle is equipped with the steel ball inner raceway corresponding with steel ball outer raceway;The outer side of bearing inner ring entity axle is equipped with the cylindrical roller inner raceway corresponding with cylindrical roller outer raceway, and rolling element is between steel ball outer raceway and steel ball inner raceway and cylindrical roller outer raceway and cylindrical roller inner raceway.

[0007] Further, the rolling element includes steel balls and full cylindrical rollers, the steel balls are between the steel ball outer raceway and the steel ball inner raceway;Full cylindrical rollers are between cylindrical roller outer raceway and cylindrical roller inner raceway.

[0008] Further, the high load connected body bearing for limited space further includes a nylon retainer, which is arranged between the steel balls in the steel ball outer raceway and the steel ball inner raceway, and the steel balls are on the nylon retainer.

[0009] Further, the bearing outer ring sleeve is provided with a tool withdrawal groove.

[0010] Further, the bearing outer ring sleeve is provided with two cylindrical roller outer raceways, and the bearing inner ring solid shaft is provided with two cylindrical roller inner raceways; the two cylindrical roller outer raceways are arranged at two ends of the bearing outer ring sleeve; and the two cylindrical roller inner raceways are arranged at two ends of the bearing inner ring solid shaft.

[0011] Further, the bearing inner ring solid shaft is provided with a positioning sleeve at one end

[0012] The utility model discloses the advantages are as follows:

[0013] 1, compact structure, save space. Integrated design integrates the ball and the full needle bearing in a compact structure, the outer ring needle roller raceway and the ball end raceway are integrated into an outer ring, the ball end raceway of the inner ring and the needle bearing inner ring are concentrated in a whole with the mounting shaft, and the full needle axial positioning ring is added after the needle. Save the space occupied by the equipment, especially suitable for compact equipment or modular design application scene.

[0014] 2, simplified installation and maintenance cost. Without disassembling the split components (such as ball cover, needle sleeve, etc.), the disassembly steps are reduced. The installation time is shortened, the initial installation cost is reduced, the use of tools and labor is reduced, and the maintenance efficiency is improved. The outer ring is integrated, and the rigidity is greater when mounted with external components. The full needle bearing is integrated with the channel and integrated on the mounting shaft, and the shaft rigidity is greater. Compared with the same outer diameter and width, the integrated bearing has greater carrying capacity, greater rigidity and more convenient installation and positioning.

[0015] 3, optimized rolling body design. The length-diameter ratio of the optimized simulation design needle is greatly reduced, the contact stress peak value is greatly reduced, the fatigue life is improved by more than 3 times, the edge stress peak value is reduced, the end of the raceway is naturally avoided, the bending resistance of the needle bearing is improved, and the dynamic stiffness is strengthened. The needle can better share the load and improve the rolling efficiency. The friction and vibration between the rolling bodies are reduced, the integrated design is closely matched, the vibration and noise are reduced, the axial gap error is reduced, and the axial positioning and radial runout accuracy and dynamic performance are further improved.

[0016] 4, high reliability and stability. It has higher rigidity and stability, and can bear greater dynamic load. In high load or extreme working environment (such as high temperature, high humidity or vibration environment), the integrated design can better share the load and reduce the risk of local overload.

[0017] 5, long-term durability and easy integration. The integrated design is suitable for modular integration, reduces the friction and vibration between the rolling bodies, prolongs the service life of the rolling bodies, optimizes the structure layout, reduces the local stress concentration, and improves the overall fatigue life. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The illustrations, together with the description, serve to explain the application, but are not intended to limit the application in any way.

[0019] Also, throughout the drawings, like reference numerals are used to indicate like elements throughout the several views.

[0020] In the drawings:

[0021] Figure 1 Structure schematic view of one ball one full rolling needle in an embodiment of the utility model.

[0022] Figure 2 Structure schematic view of one ball one full rolling needle in an embodiment of the utility model. Figure 1 Structure schematic view of one ball one full rolling needle in an embodiment of the utility model. Figure 1 .

[0023] Figure 3 Structure schematic view of one ball one full rolling needle in an embodiment of the utility model. Figure 1 Structure schematic view of one ball one full rolling needle in an embodiment of the utility model. Figure 2 .

[0024] Figure 4 Structure schematic view of one ball two full rolling needles in an embodiment of the utility model.

[0025] Figure 5 Structure schematic view of one ball two full rolling needles in an embodiment of the utility model. Figure 4 Structure schematic view of one ball two full rolling needles in an embodiment of the utility model. Figure 1 .

[0026] Figure 6 Structure schematic view of one ball two full rolling needles in an embodiment of the utility model. Figure 4 Structure schematic view of one ball two full rolling needles in an embodiment of the utility model. Figure 2 .

[0027] The meanings of the reference numerals in the drawings are as follows:

[0028] 01, first bearing outer ring sleeve; 02, first steel ball outer raceway; 03, first steel ball; 05, first tool withdrawal groove; 06, first cylindrical roller outer raceway; 07, first full cylindrical roller; 09, first nylon retainer; 10, first steel ball inner raceway; 11, first cylindrical roller inner raceway; 12, first bearing inner ring solid shaft; 13, first positioning sleeve; 14, second bearing outer ring sleeve; 16, second cylindrical roller outer raceway; 17, second full cylindrical roller; 18, second tool withdrawal groove; 20, second steel ball outer raceway; 21, second steel ball; 23, third tool withdrawal groove; 24, third cylindrical roller outer raceway; 25, third full cylindrical roller; 26, second bearing inner ring solid shaft; 27, second cylindrical roller inner raceway; 28, second nylon retainer; 29, second steel ball inner raceway; 30, third cylindrical roller inner raceway; 31, third positioning sleeve; 32, second positioning sleeve DETAILED DESCRIPTION

[0029] Embodiments of the present disclosure will be described in more detail with reference to the drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly and completely understood. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0030] In addition, it should be further noted that only parts related to the utility model are shown in the drawings for ease of description. The embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0031] It should be noted that the concepts of "first", "second", etc. mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0032] It should be noted that the modification of "one" or "multiple" mentioned in the present disclosure is illustrative and not restrictive, and those skilled in the art should understand that unless otherwise explicitly stated in the context, it should be understood as "one or more".

[0033] The names of the messages or information exchanged between the plurality of devices in the embodiments of the present disclosure are only for illustrative purposes, and are not used to limit the scope of the messages or information.

[0034] The present disclosure will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0035] A high-load connected bearing for limited space includes a ball-full needle and a ball-two-full needle.

[0036] As Figures 1-3 shown, one ball one full needle includes first bearing outer ring sleeve 01, first bearing inner ring solid shaft 12 and rolling body, the inner side of first bearing outer ring sleeve 01 is provided with first steel ball outer raceway 02 and first cylindrical roller outer raceway 06, first steel ball outer raceway 02 and first cylindrical roller outer raceway 06 are parallelly arranged.The outer side of first bearing inner ring solid shaft 12 is provided with first steel ball inner raceway 10 corresponding to first steel ball outer raceway 02;The outer side of first bearing inner ring solid shaft 12 is provided with first cylindrical roller inner raceway 11 corresponding to first cylindrical roller outer raceway 06, and the rolling body includes a plurality of first steel balls 03 between first steel ball outer raceway 02 and first steel ball inner raceway 10 and a plurality of first full cylindrical rollers 07 between first cylindrical roller outer raceway 06 and first cylindrical roller inner raceway 11.

[0037] The first nylon retainer 09 is arranged between the first steel ball outer raceway 02 of the first bearing outer ring sleeve 01 and the first steel ball inner raceway 10 of the first bearing inner ring solid shaft 12 in the one ball one full needle, and the first steel balls 03 are located in the first nylon retainer 09.

[0038] The first relief groove 05 of the first bearing outer ring sleeve 01 in the one ball one full needle is convenient for grinding the raceway surface of the first cylindrical roller outer raceway 06 of the first bearing outer ring sleeve 01, and reduces the stress concentration of the bearing.

[0039] The rightmost first positioning sleeve 13 of the first bearing inner ring solid shaft 12 in the one ball one full needle is convenient for the end face contact positioning of the cylindrical roller.

[0040] As Figures 4-6 shown, one ball one full needle includes second bearing outer ring sleeve 14, second bearing inner ring solid shaft 26 and rolling body. The inner side of second bearing outer ring sleeve 14 is provided with second cylindrical roller outer raceway 16, second steel ball outer raceway 20 and third cylindrical roller outer raceway 24, and the second cylindrical roller outer raceway 16, the second steel ball outer raceway 20 and the third cylindrical roller outer raceway 24 are parallelly arranged. The outer side of second bearing inner ring solid shaft 26 is provided with second cylindrical roller inner raceway 27 corresponding to second cylindrical roller outer raceway 16, and a plurality of second full cylindrical rollers 17 are arranged between the second cylindrical roller outer raceway 16 and the second cylindrical roller inner raceway 27;Second steel ball inner raceway 29 corresponding to second steel ball outer raceway 20, and a plurality of second steel balls 21 are arranged between the second steel ball outer raceway 20 and the second steel ball inner raceway 29;The outer side of second bearing inner ring solid shaft 26 is provided with third cylindrical roller inner raceway 30 corresponding to third cylindrical roller outer raceway 24, and a plurality of third full cylindrical rollers 25 are arranged between the third cylindrical roller outer raceway 24 and the third cylindrical roller inner raceway 30.

[0041] The second nylon retainer 28 is arranged between the second steel ball outer raceway 20 of the second bearing outer ring sleeve 14 and the second steel ball inner raceway 29 of the second bearing inner ring solid shaft 26 in the one-ball two-full-needle roller bearing.

[0042] The second tool withdrawal groove 18 of the second bearing outer ring sleeve 14 in the one-ball two-full-needle roller bearing facilitates the grinding of the outer raceway surface of the second cylindrical roller outer raceway 16 of the second bearing outer ring sleeve 14 and reduces stress concentration of the bearing at the position.

[0043] The leftmost side of the second bearing inner ring solid shaft 14 in the one-ball two-full-needle roller bearing is provided with a second positioning sleeve 32, and the rightmost side is provided with a third positioning sleeve 31, which facilitates the positioning of the cylindrical roller end face.

[0044] In the high-load connected bearing, the diameter of the cylindrical roller is larger than that of the original high-load connected bearing, and the axial load capacity of the bearing can be greatly improved.

[0045] The axial load capacity of the high-load connected bearing is stronger through the arrangement of the full cylindrical rollers.

[0046] The ball bearing raceway (radial load) and the full needle roller raceway (axial load) of the application are integrated in a single outer ring. The ball bearing inner ring and the needle roller bearing inner ring are integrated with the shaft, breaking the boundary of traditional split design, saving the axial space and radial space of the bearing compared with the traditional single bearing assembly, and improving the radial load capacity and structural compactness.

[0047] Based on the Hertz contact theory, the simulation optimization design is carried out to match the length-diameter ratio of the needle roller and the diameter of the ball, so that the radial load capacity and the axial load capacity are improved by the same proportion, the service life and the working stress of the rolling elements (two or three rows) in the bearing are synchronized, and the service life of the needle roller end and the service life of the ball end are consistent.

[0048] In addition, the application introduces the "flexible raceway micro-curved surface" technology, which allows the shaft to be inclined at an angle of ≤0.5° while maintaining uniform stress distribution (traditional needle roller bearing inclination ≥0.2°, which causes edge stress concentration), thereby prolonging the service life of the bearing.

[0049] The bearing adopts a unique "one ball and one full needle" structure design, integrates single-row ball bearings and full-needle bearings, retains high speed and low friction torque characteristics of ball bearings, can bear large axial load and accurate positioning, and significantly improves radial load capacity through full-needle design. At the same time, the integrated structure design makes the bearing have compact radial size, suitable for the demand in limited space. In addition, the bearing is not sensitive to the deflection of the shaft, can bear large radial load, has greater axial load and higher axial running accuracy than full-needle bearings and single-row needle bearings. It can adapt to complex working conditions and has wide application prospect.

[0050] Compared with the shaft coupling bearing of one ball and one column and one ball and two columns, the utility model carries out full roller (needle) design to the column end, and the radial load capacity and radial rigidity are greatly improved; the ball end is given four-point contact design with relatively large radial clearance, is used for bearing axial load and axial positioning in the working process, and almost does not bear radial load. The utility model bears the bearing radial load and axial load separately, and gives accurate positioning of the bearing parts and components.

[0051] The above description is only some preferred embodiments of the present disclosure and an explanation of the technical principles applied. Those skilled in the art should understand that the utility model range involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the above utility model concept. For example, the above features are replaced with the technical features disclosed in the embodiments of the present disclosure (but not limited to) having similar functions to form technical solutions.

Claims

1. A high load capacity continuous bearing for use in a confined space, characterized by: The bearing outer ring sleeve is provided with a steel ball outer raceway and a cylindrical roller outer raceway on the inner side, and the steel ball outer raceway and the cylindrical roller outer raceway are arranged in parallel; the bearing inner ring solid shaft is provided with a steel ball inner raceway corresponding to the steel ball outer raceway on the outer side; the bearing inner ring solid shaft is provided with a cylindrical roller inner raceway corresponding to the cylindrical roller outer raceway on the outer side, and the rolling body is located between the steel ball outer raceway and the steel ball inner raceway and between the cylindrical roller outer raceway and the cylindrical roller inner raceway.

2. The high load capacity continuous bearing for limited spaces according to claim 1, characterized in that: The rolling body includes a steel ball and a full cylindrical roller, the steel ball is located between the steel ball outer raceway and the steel ball inner raceway, and the full cylindrical roller is located between the cylindrical roller outer raceway and the cylindrical roller inner raceway.

3. The high load capacity continuous bearing for limited spaces according to claim 1, characterized in that: It also includes a nylon retainer, which is arranged between the steel ball outer raceway and the steel ball inner raceway, and the steel ball is arranged on the nylon retainer.

4. The high load capacity continuous bearing for limited spaces of claim 1, wherein: The bearing outer ring sleeve is provided with a tool withdrawal groove.

5. The high load capacity continuous bearing for limited spaces according to claim 1, characterized in that: The bearing outer ring sleeve is provided with two cylindrical roller outer raceways, and the bearing inner ring solid shaft is provided with two cylindrical roller inner raceways; two cylindrical roller outer raceways are arranged at both ends of the bearing outer ring sleeve; two cylindrical roller inner raceways are arranged at both ends of the bearing inner ring solid shaft.

6. The high load capacity continuous bearing for limited spaces of claim 1, wherein: The bearing inner ring solid shaft is provided with a positioning sleeve at one end.

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