Four-point contact ball bearing with special weight reduction design
By using an inner ring wave-shaped weight-reduction groove, an outer gear ring I-beam design, and ceramic ball replacement, the problem of insufficient weight reduction in conventional designs has been solved, achieving significant weight reduction and improved manufacturability, making it suitable for aerospace, precision instruments and other fields.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-03-27
AI Technical Summary
Conventional weight-reduction designs for four-point contact ball bearings have limited weight-reduction effects, cannot meet the high requirements of applications such as aerospace and precision instruments, and have poor manufacturability.
It adopts a special design for the inner and outer gear rings, including a wave-shaped, radially penetrating weight reduction groove in the inner ring and an I-beam design for the weight reduction groove in the outer gear ring. It also uses ceramic balls instead of steel balls, integrates plug holes and oil injection holes, and increases the weight reduction space.
It achieves significant weight reduction in bearings, reducing weight by more than 30%, meeting high weight reduction requirements, while maintaining bearing rigidity and machinability, making it suitable for demanding applications.
Smart Images
Figure CN224049553U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to bearing technical field, concretely relates to a four point contact ball bearing of special weight reduction design. BACKGROUND
[0002] It is known that the weight of a bearing is a key technical index of a finished bearing, and reducing the weight of a bearing can reduce the inertia of rotating parts, improve the operation efficiency of mechanical equipment, reduce the stress and friction between parts, obtain smaller friction torque, and reduce the heat generated during the operation of the bearing. In some specific bearing application scenarios, such as aerospace, precision instruments, medical devices and the like, the weight of the bearing is strictly required, and weight reduction can meet the requirements of these special application scenarios and improve the portability and flexibility of the equipment.
[0003] The inner ring and the outer ring of the conventional four point contact ball bearing with external teeth are provided with mounting holes on the end faces for fixing the bearing on the equipment, and the weight reduction design needs to consider that the functional characteristics of the bearing after weight reduction cannot be lost, the rigidity of the bearing meets the use requirements, and the machining process of the bearing parts after weight reduction needs to be considered. The conventional weight reduction design generally makes weight reduction holes on the inner ring and the outer ring, and the weight reduction design method has the advantages of superior machining process of the bearing after weight reduction, and the disadvantages of limited weight reduction effect, which cannot meet the requirements of special application scenarios with high weight reduction requirements. UTILITY MODEL CONTENT
[0004] In order to overcome the conventional design of the four point contact ball bearing in the background art, which cannot meet the requirements of special application scenarios with high weight reduction requirements, the utility model provides a four point contact ball bearing of special weight reduction design.
[0005] In order to achieve the object of the application, the application adopts the following technical solutions:
[0006] A four point contact ball bearing of special weight reduction design, comprising an inner ring and an outer ring, the inner ring is arranged inside the outer ring, a ceramic ball, a spacer block, a plug, a conical pin and a sealing ring are further arranged between the outer ring and the inner ring, a plurality of inner ring mounting countersunk holes are arranged on the end face of the inner ring, an inner ring plug hole is further arranged in the inner diameter direction of the corresponding inner ring, an inner ring taper pin hole and an inner ring oil injection hole are arranged between two inner ring mounting countersunk holes, and an outer ring tooth top circular step is arranged at both ends of the outer ring, an outer ring sealing groove and an outer ring peach-shaped channel of four point ball are arranged on the inner diameter of the outer ring.
[0007] The inner ring mounting countersunk hole is provided with a wavy inner ring lightening groove, the bottom of the inner ring lightening groove is kept a distance from the bottom of the inner ring peach-shaped channel, the inner ring lightening groove is axially through and radially through the bearing inner diameter, and a part of the inner diameter is left at the bearing inner diameter at the inner ring mounting countersunk hole, the inner ring peach-shaped channel and the inner ring sealing groove are provided on the bearing inner and outer diameters.
[0008] The end face of the outer ring gear is also provided with a plurality of outer ring gear threaded holes which are circumferentially distributed, and the middle of the outer ring gear threaded hole is provided with a plurality of outer ring gear lightening grooves which are circumferentially distributed.
[0009] The outer ring gear lightening groove is designed as an H-shaped beam in the axial direction, two outer ring gear large fan rings are correspondingly arranged at the two ends of the H-shaped beam, and one outer ring gear small fan ring is correspondingly arranged in the middle of the H-shaped beam.
[0010] The conical pin is used for fixing the plug on the inner ring.
[0011] The plug inner diameter is consistent with the curvature of the outer ring gear inner diameter.
[0012] Compared with the prior art, the beneficial effects of the utility model are that: the plug hole and the inner ring oil injection hole are integrated between the two adjacent mounting countersunk holes in the inner ring, which provides a larger lightening space for the lightening design; the lightening groove is designed as a wavy shape, is axially through and radially through the bearing inner diameter, compared with the conventional lightening hole design scheme, the lightening effect is more obvious; the lightening groove of the outer ring gear is designed as three fan rings in the circumferential direction and an H-shaped beam in the axial direction, which realizes the maximum lightening of the bearing outer ring; the ceramic ball is used to replace the commonly used steel ball, the density of the ceramic material is about one third of the density of the steel material, which is suitable for the lightening of the bearing; compared with the conventional lightening hole design, the special lightening design can reduce the weight by more than 30%, the lightening effect is obvious, and the demand of the special application scene with high lightening requirement can be met. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic view of the utility model.
[0014] Figure 2 It is a top view. Figure 1
[0015] Figure 3 It is a D-D sectional view in Figure 2
[0016] Figure 4 It is a structural schematic view of the inner ring in the utility model.
[0017] Figure 5 It is a lightening groove position distribution diagram of the inner ring in the utility model.
[0018] Figure 6 It is the structural schematic view of the outer gear ring in the utility model.
[0019] Figure 7 It is the position distribution view of the weight reduction groove of the outer gear ring in the utility model.
[0020] In the figure: 1, inner ring; 2, outer gear ring; 3, ceramic ball; 4, isolation block; 5, plug; 6, conical pin; 7, sealing ring; 8, inner ring end face; 9, inner ring mounting countersunk hole; 10, inner ring conical pin hole; 11, inner ring oil injection hole; 12, inner ring plug hole; 13, inner ring weight reduction groove; 14, inner ring weight reduction groove bottom; 15, inner ring peach-shaped channel bottom; 18, inner ring peach-shaped channel; 19, inner ring sealing groove; 20, outer gear ring tooth top circular step; 21, outer gear ring inner diameter; 22, outer gear ring peach-shaped channel; 23, outer gear ring sealing groove; 24, outer gear ring end face; 25, outer gear ring threaded hole; 26, outer gear ring weight reduction groove; 27, outer gear ring large fan ring; 28, outer gear ring small fan ring. DETAILED DESCRIPTION
[0021] The specific embodiments of the utility model are further described in detail in combination with the drawings.
[0022] As Figures 1-7 shown, a four-point contact ball bearing with special weight reduction design includes an inner ring 1 and an outer gear ring 2, the inner ring is arranged inside the outer gear ring; the outer gear ring and the inner ring are further provided with ceramic balls 3, isolation blocks 4, plugs 5, conical pins 6 and sealing rings 7; the inner ring end face is provided with a plurality of circumferentially distributed inner ring mounting countersunk holes 9, and an inner ring conical pin hole 10 and an inner ring oil injection hole 11 are arranged between two of the inner ring mounting countersunk holes 9, and a corresponding inner diameter direction is further provided with an inner ring plug hole 12; the conical pin 6 is used for fixing the plug 5 on the inner ring 1; the inner diameter of the plug 5 is consistent with the curvature of the outer gear ring inner diameter 21 of the outer gear ring 2; the inner ring integrates the plug hole and the inner ring oil injection hole 11 between the adjacent two mounting countersunk holes, which provides a larger weight reduction space for the weight reduction design; the outer gear ring 2 is provided with two outer gear ring tooth top circular steps 20 at both ends, and is provided with an outer gear ring peach-shaped channel 22 of four-point ball and an outer gear ring sealing groove 23 on the inner diameter.
[0023] The inner ring mounting countersunk hole 9 is provided with a wave-shaped inner ring lightening groove 13, the bottom 14 of the inner ring lightening groove is kept a certain distance from the bottom 15 of the inner ring peach-shaped groove, the inner ring lightening groove 13 is axially through and radially through the bearing inner diameter, and a part of the inner diameter is left at the bearing inner diameter at the inner ring countersunk hole 9, the inner ring peach-shaped groove 18 provided with four-point balls and the inner ring sealing groove 19 are arranged on the inner diameter and the outer diameter of the bearing, the outer ring 2 is further provided with a plurality of outer ring threaded holes 25 arranged in a circle on the end face, a plurality of outer ring lightening grooves 26 arranged in a circle are arranged in the middle of the outer ring threaded hole 25, the lightening groove is designed in a wave shape, is axially through and radially through the bearing inner diameter, and compared with the conventional lightening hole design scheme, the lightening effect is more obvious.
[0024] The outer ring lightening groove 26 is designed in an I-beam shape in the axial direction, two outer ring large fan rings 27 are arranged at both ends of the I-beam, and an outer ring small fan ring 28 is arranged in the middle, the outer ring lightening groove 26 is designed in three fan rings in the circumferential direction, the two outer ring large fan rings 27 are the same in shape and are arranged at both ends in the axial direction, the outer ring small fan ring 28 in the middle is kept a certain distance from the bottom of the peach-shaped groove, the design of the three fan rings realizes the maximum lightening of the bearing outer ring 2, the peach-shaped groove is surface hardened and has a certain hardening layer depth, the bottom of the outer ring small fan ring 28 is kept a certain distance from the bottom of the peach-shaped groove and also has a certain distance in the axial direction, the special design of thickening on both sides of the groove meets the requirement of the surface hardened induction layer of the groove and increases the rigidity of the bearing outer ring, the bearing adopts ceramic balls 3 instead of the commonly used steel balls, the density of the ceramic material is about one-third of the density of the steel material, which is suitable for the lightening of the bearing.
[0025] In practical use, this utility model integrates the plug hole and the inner ring oil injection hole between two adjacent countersunk holes by designing the inner ring, providing more space for weight reduction design; the weight reduction groove is designed as a wave shape, axially penetrating and radially penetrating the inner diameter of the bearing, which has a more obvious weight reduction effect compared with the conventional weight reduction hole design; the channel is surface hardened to a certain depth of hardened layer, and the bottom of the weight reduction groove is kept at a certain distance from the bottom of the peach-shaped channel, so as not to damage the hardened layer of the channel, and also to take into account the rigidity of the bearing inner ring and the manufacturability of the bearing inner ring while taking into account the weight reduction of the bearing inner ring. The countersunk bearing design leaves a portion of its inner diameter to ensure radial positioning during installation. The weight-reduction grooves on the outer gear ring are designed with three fan-shaped rings circumferentially and an I-beam shape axially, maximizing weight reduction on the outer ring. Ceramic balls are used instead of steel balls; the density of ceramic is approximately one-third that of steel, which is beneficial for bearing weight reduction. This special weight-reduction design achieves over 30% weight reduction compared to conventional weight-reduction hole designs, demonstrating a significant effect and meeting the needs of special applications with high weight-reduction requirements. Finally, after the bearing weight-reduction design is completed, 3D modeling and simulation of bearing operating conditions are used to load the bearing. Finite element analysis is then employed to determine the bearing's rigidity and strength, ensuring its reliability during use.
[0026] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A special weight-reducing design four-point contact ball bearing, comprising an inner ring (1) and an outer ring (2), the inner ring (1) being arranged inside the outer ring (2); ceramic balls (3), isolating blocks (4), plugs (5), conical pins (6) and sealing rings (7) being further arranged between the outer ring (2) and the inner ring (1); a plurality of circumferentially distributed inner ring mounting countersunk holes (9) being arranged on the end face (8) of the inner ring (1), and an inner ring taper pin hole (10) and an inner ring oil injection hole (11) being arranged between any two of the inner ring mounting countersunk holes (9), and a corresponding inner ring plug hole (12) being further arranged in the inner diameter direction; two outer ring addendum circle steps (20) being arranged at the two ends of the outer ring (2), and an outer ring peach-shaped groove (22) and an outer ring sealing groove (23) being arranged on the inner diameter of the outer ring (2).
2. Four-point contact ball bearing of special weight-saving design according to claim 1, characterized in that The inner ring mounting countersunk holes (9) are arranged with wavy inner ring weight-reducing grooves (13), the bottom (14) of the inner ring weight-reducing grooves being kept a certain distance from the bottom (15) of the inner ring peach-shaped groove, the inner ring weight-reducing grooves (13) being axially through and radially through the inner diameter of the bearing, and a part of the inner diameter being left at the inner diameter of the bearing at the inner ring mounting countersunk holes (9), an inner ring peach-shaped groove (18) and an inner ring sealing groove (19) being arranged on the inner and outer diameters of the bearing.
3. The four-point contact ball bearing of special reduced weight design according to claim 1, characterized in that: A plurality of circumferentially distributed outer ring threaded holes (25) are further arranged on the end face of the outer ring (2); a plurality of circumferentially distributed outer ring weight-reducing grooves (26) are arranged in the middle of the outer ring threaded holes (25).
4. Four-point contact ball bearing of special reduced weight design according to claim 3, characterized in that: The outer ring weight-reducing grooves (26) are all designed as I-beams in the axial direction, two outer ring large fan rings (27) being correspondingly arranged at the two ends of the I-beam, and an outer ring small fan ring (28) being correspondingly arranged in the middle of the I-beam.
5. The special reduced weight design four-point contact ball bearing of claim 1, wherein: The conical pin (6) is used for fixing the plug (5) on the inner ring.
6. The special reduced weight design four-point contact ball bearing of claim 1, wherein: The inner diameter of the plug (5) is consistent with the curvature of the outer ring inner diameter (21) of the outer ring (2).