Ball bearing and machining method thereof
By using a split ring design and a dual-sensor quenching process, the problems of blocked holes and insufficient quenching in traditional ball bearings have been solved, achieving high hardness and a load-bearing surface without weak points, thereby improving load-bearing capacity and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-03
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional single-row ball bearings have holes in the gearless ring, which leads to structural softness, and there are areas that are not fully quenched during the quenching process, affecting load-bearing capacity and service life.
The design adopts a split ring body, eliminating the blocking holes, and uses a dual-sensor back-scanning quenching process to achieve continuous and seamless connection between raceway heating and cooling, avoiding the generation of process soft strips.
The structural soft band was completely eliminated, improving the physical properties and service life of the ball bearing, enhancing its load-bearing capacity, and extending the product's reliability.
Smart Images
Figure CN121739005A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mechanical transmission components, specifically to ball bearings and their processing methods. Background Technology
[0002] Ball bearings are key components in construction machinery and are widely used in equipment such as cranes and excavators.
[0003] Traditional single-row ball bearings have two inherent defects: first, holes must be drilled in the gearless ring to install the steel balls, resulting in a structural soft band near the holes; second, during induction hardening, there is an insufficiently hardened area between the starting and ending positions, forming a process soft band. These soft band areas refer to regions that have not been effectively hardened and have low hardness; the soft band becomes a weak link in the slewing bearing, seriously affecting its load-bearing capacity and service life.
[0004] Although there have been attempts at soft strip quenching methods in related technologies, the structural soft strip problem caused by blocked holes still cannot be solved. Furthermore, thermal overlap during the quenching process leads to secondary quenching, and the excessively high bearing temperature deteriorates its physical properties. Summary of the Invention
[0005] In view of this, the present invention provides a ball bearing and a processing method thereof to solve the problem of soft band areas in ball bearings.
[0006] In a first aspect, the present invention provides a ball bearing, comprising a first ring assembly, a second ring assembly, a ball, and a spacer block. The first ring assembly has a first raceway on its inner side, and the second ring assembly is disposed on the inner side of the first ring assembly, and has a second raceway on its outer side. An assembly cavity is formed between the first ring assembly and the second ring assembly. The first ring assembly and / or the second ring assembly includes two sub-rings stacked axially. The ball is disposed in the assembly cavity and can roll relative to the assembly cavity. The spacer block is disposed in the assembly cavity at a distance from the ball.
[0007] In one optional embodiment, the first ring assembly includes a first ring body and a shaft tooth, the shaft tooth being disposed on the outer surface of the first ring body; the second ring assembly includes a first sub-ring body and a second sub-ring body, the first sub-ring body and the second sub-ring body being mutually limitingly connected; the first ring body, the first sub-ring body, and the second sub-ring body are combined to form an assembly cavity.
[0008] In one optional embodiment, the second ring assembly includes a second ring body and a shaft tooth, the shaft tooth being disposed on the outer surface of the second ring body. The first ring assembly includes a third sub-ring body and a fourth sub-ring body, the third sub-ring body and the fourth sub-ring body being mutually restrictive and connected. The second ring body, the third sub-ring body, and the fourth sub-ring body are combined to form an assembly cavity.
[0009] In one optional embodiment, the second ring assembly includes a first sub-ring and a second sub-ring, and the first ring assembly includes a third sub-ring and a fourth sub-ring. The first sub-ring and the second sub-ring are mutually limitingly connected, and the third sub-ring and the fourth sub-ring are also mutually limitingly connected. The first sub-ring, the second sub-ring, the third sub-ring, and the fourth sub-ring are combined to form an assembly cavity.
[0010] In one alternative embodiment, the second ring assembly further includes a positioning part, and the first sub-ring body and the second sub-ring body are fitted together along the positioning part.
[0011] In one alternative embodiment, the ball bearing further includes a seal, and the first ring assembly and the second ring assembly are each provided with a sealing groove that mates with the seal. The sealing groove is located at the contact end of the first ring assembly and the second ring assembly, and the seal is located in the sealing groove and forms an assembly cavity with the first ring assembly and the second ring assembly.
[0012] In one optional embodiment, mounting holes are provided on the first ring body, the first sub-ring body, and the second sub-ring body. The mounting holes are distributed along the circumferential direction and are distributed one-to-one with the axis of the ball bearing as the center.
[0013] Secondly, the present invention also provides a method for processing a ball bearing. The ball bearing includes a first ring assembly, a second ring assembly, a ball, a spacer block, and a seal. The second ring assembly includes a first sub-ring and a second sub-ring. The first ring assembly and the second ring assembly are combined to form an assembly cavity. The ball and the spacer block are disposed in the assembly cavity. The method for processing the ball bearing includes the following steps: processing a second raceway, a second oil groove, and a positioning part for forming the assembly cavity on the first sub-ring and the second sub-ring respectively, wherein the second oil groove is disposed at the bottom of the raceway; rounding the corners of the second oil groove; processing connecting holes on the first sub-ring and the second ring; connecting the first sub-ring and the second ring through the positioning part and connecting them with fasteners passing through the connecting holes to form a second ring. The assembly process involves: assembling a ring body; quenching the second ring body assembly; precision machining the quenched second ring body assembly, and creating a sealing groove and mounting holes; machining the first raceway and first oil groove of the first ring body assembly to form the assembly cavity; quenching the end of the first ring body assembly with the first raceway and first oil groove; machining shaft teeth at the end of the first ring body assembly away from the second ring body assembly; quenching the shaft teeth; precision machining the quenched first ring body assembly, and creating a sealing groove and mounting holes; disassembling fasteners to separate the first and second sub-ring bodies; inserting the sphere and spacer block into the assembly cavity formed by the first and second raceways; reconnecting the first and second sub-ring bodies; and embedding the seal into the sealing groove to complete the assembly.
[0014] In one optional embodiment, the quenching process employs a dual-sensor quenching system, including a first sensor, a second sensor, a first cooling head, and a second cooling head. The workflow of the dual-sensor quenching system is as follows: the first and second sensors are placed at the starting position of the first or second raceway, with a distance of less than or equal to 1.5 mm; both the first and second sensors preheat the first or second raceway at a frequency of f1; both the first and second sensors adjust their heating frequency to f2, causing the first and second sensors to move in opposite circumferential directions, scanning the first raceway at a speed of 3 mm / s-5 mm / s. The surface of a raceway or a second raceway; when the first and second sensors move, the corresponding first and second cooling heads immediately spray coolant to quench the heated area; at the end of the quenching process, the first and second sensors stop rotating when they come into contact, the heating frequency of the second sensor is adjusted to f3 and the area is kept warm, then the first and second sensors are withdrawn in sequence, the first and second cooling heads are brought together to complete the quenching of the end area, and the following conditions are met: 5000Hz≤f1≤8000Hz, 2500Hz≤f2≤5000Hz, 2500Hz≤f3≤5000Hz.
[0015] In one alternative embodiment, the first cooling head, the second cooling head, the first sensor, and the second sensor are contour-guided, and their surface shapes are determined based on the curvature and rotation diameter of the first ring assembly, the first sub-ring, and the second sub-ring.
[0016] The technical solution proposed in this application has at least the following technical effects: By designing the ring without shaft teeth as a detachable first and second sub-ring body, the blocking hole in the traditional structure is eliminated, thus completely eliminating the unquenched or low-hardness area (i.e., structural soft strip) caused by the blocking hole. Simultaneously, the accompanying dual-inductor back-scanning quenching process achieves continuous and seamless heating and cooling along the raceway circumference, avoiding the formation of process soft strips at the start and end of quenching, resulting in a complete, unburdened annular bearing surface. Because both the first and second raceways possess uniformly high hardness and high load-bearing capacity, the ball bearing of this application exhibits overall improved physical properties in axial and radial load-bearing capacity. More importantly, the elimination of the soft strip—a fatigue crack initiation point—significantly delays spalling caused by contact fatigue in the raceway, thereby extending the product's service life and reliability. Attached Figure Description
[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of a ball bearing according to an embodiment of the present invention; Figure 2 for Figure 1 A magnified view of part A in the diagram; Figure 3 This is a schematic flowchart of a ball bearing processing method according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the quenching process of the ball bearing processing method according to an embodiment of the present invention; Figure 5 This is a second schematic diagram of the quenching process of the ball bearing processing method according to an embodiment of the present invention; Figure 6 This is a schematic diagram (third one) of the quenching process of the ball bearing processing method according to an embodiment of the present invention.
[0019] Explanation of reference numerals in the attached figures: 1. First ring assembly; 101. First ring body; 102. Shaft gear; 2. Second ring assembly; 201. First sub-ring body; 202. Second sub-ring body; 203. Positioning part; 204. Connecting hole; 3. Ball; 4. Seal; 5. Sealing groove; 6. First sensor; 7. Second sensor; 8. First cooling head; 9. Second cooling head; 10. Mounting hole. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] It should be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to impose strict limitations on the technical solutions unless the context clearly indicates otherwise. For example, the use of "a," "an," and "" to modify a feature does not exclude the possibility that the feature may be plural in other embodiments.
[0022] It should be understood that the terms "comprising," "including," and "having" are open-ended, indicating the presence of the stated features but not excluding the possibility of other features in the embodiment. Similarly, the use of terms such as "first," "second," etc., to describe multiple features only indicates the distinction between one feature and another, and such terms do not imply order or sequence unless explicitly stated in the context.
[0023] It should be understood that, unless the context clearly indicates otherwise, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a direct connection or an indirect connection via a medium. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.
[0024] In addition, for ease of description, the text will use terms of spatial relative relationship to describe the position of one feature relative to another feature, such as "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific situations besides those shown in the accompanying drawings of the specification.
[0025] The embodiments of this application are described below with reference to the accompanying drawings. It can be understood that the technical features involved in the different embodiments described below can be combined with each other as long as they do not conflict with each other.
[0026] The following is combined Figures 1 to 5 The following describes embodiments of the present invention.
[0027] According to an embodiment of the present invention, in a first aspect, referring to Figure 1 and Figure 2 A ball bearing is provided, comprising a first ring assembly 1, a second ring assembly 2, a ball 3, and a spacer block. The first ring assembly 1 has a first raceway on its inner side, the second ring assembly 2 is disposed on the inner side of the first ring assembly 1, and has a second raceway on its outer side. An assembly cavity is formed between the first ring assembly 1 and the second ring assembly 2. The first ring assembly 1 and / or the second ring assembly 2 include two sub-rings stacked axially. The ball 3 is disposed in the assembly cavity and can roll relative to the assembly cavity. The spacer block is disposed in the assembly cavity at a distance from the ball 3.
[0028] It should be understood that the structural soft band refers to a weak area with low hardness and low load-bearing capacity formed in the area surrounding the plugging hole, which cannot be properly quenched in order to avoid heat treatment damage (such as burns or cracks).
[0029] In this embodiment, one or both of the ball bearing rings are designed as a split structure, consisting of two sub-rings stacked axially. The ball bearing is assembled by sequentially combining the sub-rings with the other ring assembly, fundamentally eliminating the blocking holes found in traditional structures. On the opposite end faces of the two ring assemblies, precisely machined raceways are used to achieve automatic radial alignment when the two ring assemblies are mated, and to form an assembly cavity to accommodate the ball 3, thus assembling the ball bearing. In extreme cases, if a partially damaged raceway needs to be replaced, only the corresponding sub-ring can be replaced without scrapping the entire large ring, improving maintainability. This invention eliminates the blocking hole soft band in ball bearings, significantly improving the physical properties and service life of the ball bearing.
[0030] Optionally, the material of sphere 3 may include, but is not limited to, stainless steel bearing steel, high-temperature bearing steel, high-carbon chromium bearing steel, etc.
[0031] In one embodiment, refer to Figure 1 and Figure 2 The first ring assembly 1 includes a first ring body 101 and a shaft tooth 102. The shaft tooth 102 is disposed on the outer side of the first ring body 101. The second ring assembly 2 includes a first sub-ring body 201 and a second sub-ring body 202. The first sub-ring body 201 and the second sub-ring body 202 are connected in a limiting manner. The first ring body 101, the first sub-ring body 201, and the second sub-ring body 202 are combined to form an assembly cavity.
[0032] In this embodiment, the first ring assembly 1 is the outer ring portion of the ball bearing, and the second ring assembly 2 is the inner ring portion of the ball bearing; the first ring assembly 1 is a bearing assembly with a non-split design and equipped with shaft teeth 102, and the second ring assembly 2 is a bearing assembly with a split design; the shaft teeth 102 of the first ring assembly 1 mesh with an external drive gear to transmit torque.
[0033] Specifically, in this embodiment, the first sub-ring 201 and the second sub-ring 202 are connected by bolts.
[0034] Alternatively, in some embodiments, the ball bearing does not have shaft teeth 102.
[0035] In one embodiment, the second ring body assembly 2 includes a second ring body main body and a shaft tooth 102, the shaft tooth 102 being disposed on the outer side of the second ring body main body, and the first ring body assembly 1 includes a third sub-ring body and a fourth sub-ring body, the third sub-ring body and the fourth sub-ring body being connected in a limiting manner; the second ring body main body (not shown), the third sub-ring body (not shown), and the fourth sub-ring body (not shown) are combined to form an assembly cavity.
[0036] In this embodiment, the first ring assembly 1 is the outer ring of the ball bearing, and the second ring assembly 2 is the inner ring of the ball bearing; the first ring assembly 1 is a split bearing assembly, and the second ring assembly 2 is a non-split bearing assembly with shaft teeth 102; the shaft teeth 102 of the second ring assembly 2 mesh with an external drive gear to transmit torque.
[0037] Specifically, in this embodiment, the third sub-ring body and the fourth sub-ring body are connected by bolts.
[0038] Alternatively, in some embodiments, the ball bearing does not have shaft teeth 102.
[0039] In one embodiment, the second ring assembly 2 includes a first sub-ring 201 and a second sub-ring 202, and the first ring assembly 1 includes a third sub-ring and a fourth sub-ring. The first sub-ring 201 and the second sub-ring 202 are connected in a limiting manner, and the third sub-ring and the fourth sub-ring are also connected in a limiting manner. The first sub-ring 201, the second sub-ring 202, the third sub-ring, and the fourth sub-ring are combined to form an assembly cavity.
[0040] In this embodiment, the inner and outer rings of the ball bearing are designed to be separate. The first sub-ring body 201 and the second sub-ring body 202 are stacked, and the third and fourth sub-ring bodies are arranged in layers. During installation, the bottom second sub-ring body 202 and the fourth sub-ring body are first combined, and after the ball 3 and the spacer block are placed in, the first sub-ring body 201 and the third sub-ring body are then installed. Finally, the first sub-ring body 201, the second sub-ring body 202, the third sub-ring body, and the fourth sub-ring body are respectively limited and connected.
[0041] Optionally, the shaft teeth 102 of the ball bearing are located on the first ring assembly 1 or the second ring assembly 2.
[0042] Alternatively, in some embodiments, the ball bearing does not have shaft teeth 102.
[0043] Specifically, in this embodiment, the first sub-ring 201 and the second sub-ring 202 are connected by bolts, and the third sub-ring and the fourth sub-ring are connected by bolts.
[0044] In one embodiment, refer to Figure 1 and Figure 2 The second ring assembly 2 also includes a positioning part 203, and the first sub-ring 201 and the second sub-ring 202 are attached to the positioning part 203.
[0045] Specifically, the positioning part 203 is a recess on the contact surface of one of the first sub-ring body 201 and the second sub-ring body 202 and a protrusion on the contact surface of the other. The recess and the protrusion can fit together so that the first sub-ring body 201 and the second sub-ring body 202 are aligned radially.
[0046] In one embodiment, refer to Figure 1 and Figure 2 The ball bearing also includes a seal 4. The first ring assembly 1 and the second ring assembly 2 are each provided with a sealing groove 5 that cooperates with the seal 4. The sealing groove 5 is located at the contact end of the first ring assembly 1 and the second ring assembly 2. The seal 4 is located in the sealing groove 5 and forms an assembly cavity with the first ring assembly 1 and the second ring assembly 2.
[0047] In this embodiment, the first ring assembly 1 and the second ring assembly 2 are each provided with a sealing groove 5 that cooperates with the sealing element 4. The sealing element 4 consists of two sealing rings, which are respectively embedded in different sealing grooves 5. The sealing rings protrude from the sealing grooves 5, and the protruding parts abut against the opposite ring assembly.
[0048] Specifically, the protruding part of the sealing ring abuts against the opposite ring assembly, which applies axial pressure to the opposite ring assembly, resulting in better sealing of the ball bearing assembly cavity and a more robust structure.
[0049] Optionally, the seal 4 may be made of materials including but not limited to hydrogenated nitrile rubber, polyurethane, EPDM rubber, etc.
[0050] In one embodiment, refer to Figure 1 and Figure 2 Mounting holes 10 are provided on the first ring body 101, the first sub-ring body 201, and the second sub-ring body 202. The mounting holes 10 are distributed along the circumferential direction and are distributed one-to-one with the axis of the ball bearing as the center.
[0051] Specifically, the mounting holes 10 of the first sub-ring body 201 and the second sub-ring body 202 are distributed in a one-to-one correspondence, so that the mounting holes 10 of the two are combined into a through structure to connect external components.
[0052] Furthermore, referring to Figure 1 and Figure 2 The mounting holes 10 of the first sub-ring body 201 and the second sub-ring body 202 are located on the same mounting pitch circle as the mounting holes 10 on the first ring body body 101 in a one-to-one correspondence manner; so that when the entire ball bearing is connected to external components, all mounting holes 10 can evenly distribute the load, forming a rigid integral mounting interface, avoiding local stiffness unevenness or installation deformation that may be caused by the split structure.
[0053] According to an embodiment of the present invention, in a second aspect, referring to Figure 3The present invention also provides a method for processing a ball bearing. The ball bearing includes a first ring assembly 1, a second ring assembly 2, a ball 3, a spacer block, and a seal 4. The second ring assembly 2 includes a first sub-ring 201 and a second sub-ring 202. The first ring assembly 1 and the second ring assembly 2 are combined to form an assembly cavity. The ball 3 and the spacer block are disposed in the assembly cavity. The method for processing the ball bearing includes the following steps: processing a second raceway, a second oil groove, and a positioning part 203 for forming the assembly cavity in the first sub-ring 201 and the second sub-ring 202 respectively, wherein the second oil groove is disposed at the bottom of the raceway; rounding the corners of the second oil groove; processing connecting holes 204 on the first sub-ring 201 and the second sub-ring 202; connecting the first sub-ring 201 and the second sub-ring 202 through the positioning part 203 and connecting them with fasteners passing through the connecting holes 204 to form a ball bearing. Second ring assembly 2; quench the second ring assembly 2; finish the quenched second ring assembly 2 and open the sealing groove 5 and mounting hole 10; machine the first ring assembly 1 to form the first raceway and first oil groove for the assembly cavity; quench the end of the first ring assembly 1 with the first raceway and first oil groove; machine the shaft tooth 102 at the end of the first ring assembly 1 away from the second ring assembly 2; quench the shaft tooth 102; finish the quenched first ring assembly 1 and open the sealing groove 5 and mounting hole 10; remove the fasteners and separate the first sub-ring 201 and the second sub-ring 202; install the ball 3 and the isolation block into the assembly cavity formed by the first raceway and the second raceway; reconnect the first sub-ring 201 and the second sub-ring 202, and embed the seal 4 into the sealing groove 5 to complete the assembly.
[0054] In this embodiment, by designing the raceway in two separate parts and using a pre-separation and post-assembly machining method, machining accuracy is improved while eliminating traditional blocking holes and avoiding structural soft bands. Before finishing, the separate sub-raceways are assembled and machined simultaneously, simplifying the process. During quenching, the assembled parts are machined together, ensuring consistent hardening depth and hardness across the entire raceway, resulting in stable and reliable product quality. This logical approach effectively solves the problems of structural and process-related soft bands, improving production efficiency and the quality of ball bearings.
[0055] In one alternative implementation, refer to Figures 3 to 6The quenching process employs a dual-inductor quenching system, including a first inductor 6, a second inductor 7, a first cooling head 8, and a second cooling head 9. The workflow of the dual-inductor quenching system is as follows: The first inductor 6 and the second inductor 7 are placed at the starting position of the first or second raceway, with a spacing of less than or equal to 1.5 mm; both the first inductor 6 and the second inductor 7 preheat the first or second raceway at a frequency of f1; both the first inductor 6 and the second inductor 7 are adjusted to a heating frequency of f2, causing them to move in opposite circumferential directions, scanning the first or second raceway at a speed of 3 mm / s-5 mm / s. Two raceway surfaces; when the first sensor 6 and the second sensor 7 move, the corresponding first cooling head 8 and the second cooling head 9 immediately spray coolant to quench the heated area; at the end position of the quenching process, the first sensor 6 and the second sensor 7 stop rotating when they come into contact, and the heating frequency of the second sensor 7 is adjusted to f3 and the area is kept warm. Then the first sensor 6 and the second sensor 7 are withdrawn in sequence, and the first cooling head 8 and the second cooling head 9 are brought together to complete the quenching of the end area, and the following conditions are met: 5000Hz≤f1≤8000Hz, 2500Hz≤f2≤5000Hz, 2500Hz≤f3≤5000Hz.
[0056] Understandably, the soft strip in the process is mainly caused by secondary quenching in the overlapping quenching zone or by the presence of underheated structural defects. During the quenching process, it is necessary to rationally design the heating time, heating temperature, and cooling sequence.
[0057] Specifically, in this embodiment, the dual-sensor quenching system avoids the process soft strip caused by secondary quenching or underheating of the structure by precisely controlling the motion trajectory, heating parameters and cooling sequence of the sensors.
[0058] It should be noted that higher frequencies concentrate the heating effect near the workpiece surface, while lower frequencies allow heat to penetrate deeper into the material.
[0059] This embodiment limits the range of values for f1, f2, and f3. When the values of f1, f2, and f3 are too large, that is, when the frequency used by the sensor is too high, the heating effect will be concentrated near the surface of the coil assembly, resulting in uneven heating and easily causing cracks in the coil assembly, affecting its physical properties. The upper limit of the frequency is set to f1≤8000Hz, f2≤5000Hz, and f3≤5000Hz to meet the quenching temperature requirements while ensuring uniform heating inside the coil assembly and improving the overall hardness.
[0060] This embodiment limits the value range of f1, f2, and f3. When the values of f1, f2, and f3 are too small, that is, when the frequency used by the sensor is too low, the lower frequency allows heat to penetrate deeper into the material, resulting in uneven heating and failure to reach the required quenching temperature, thus reducing the hardness of the ring assembly. The lower frequency limit is set to 5000Hz≤f1, 2500Hz≤f2, and 2500Hz≤f3 to meet the quenching temperature requirement while ensuring uniform heating inside the ring assembly and improving the overall hardness.
[0061] Specifically, f1 can take any one of the following values: 5000Hz, 5500Hz, 6000Hz, 6500Hz, 7000Hz, 7500Hz, and 8000Hz, or a range between any two of these values.
[0062] Specifically, f2 and f3 can take any one of the following values: 2500Hz, 3000Hz, 3500Hz, 4000Hz, 4500Hz, and 5000Hz, or a range between any two of these values.
[0063] In one embodiment, refer to Figures 3 to 6 The first cooling head 8, the second cooling head 9, the first sensor 6, and the second sensor 7 are designed to mimic the shape of their surfaces, which are determined by the curvature and rotation diameter of the first ring assembly 1, the first sub-ring 201, and the second sub-ring 202.
[0064] Specifically, by designing the sensor to closely match the curvature and rotation diameter of the coil, the sensor can achieve better heating of the coil and make the coil heat up more evenly.
[0065] Specifically, the cooling head is designed to mimic the curvature and rotation diameter of the ring body, which can improve the cooling effect of the cooling head on the ring body and reduce the temperature of the ring body at a preset rate to approach the ideal situation.
[0066] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A ball bearing, characterized in that, include: The first ring body assembly (1) has a first raceway on its inner side; The second ring assembly (2) has a second raceway on its outer side, which is located on the inner side of the first ring assembly (1), and an assembly cavity is formed between the two; the first ring assembly (1) and / or the second ring assembly (2) include two sub-rings stacked along the axial direction; A sphere (3) is disposed in the assembly cavity, and the sphere (3) can roll relative to the assembly cavity; An isolation block is disposed at a distance from the sphere (3) in the assembly cavity.
2. The ball bearing according to claim 1, characterized in that, The first ring assembly (1) includes a first ring body (101) and a shaft tooth (102), the shaft tooth (102) being disposed on the outer side of the first ring body (101), and the second ring assembly (2) includes a first sub-ring body (201) and a second sub-ring body (202), the first sub-ring body (201) and the second sub-ring body (202) being connected in a limiting manner; The first ring body (101), the first sub-ring body (201), and the second sub-ring body (202) are combined to form an assembly cavity.
3. The ball bearing according to claim 1, characterized in that, The second ring assembly (2) includes a second ring body and a shaft tooth (102), the shaft tooth (102) is provided on the outer side of the second ring body, and the first ring assembly (1) includes a third sub-ring body and a fourth sub-ring body, the third sub-ring body and the fourth sub-ring body are connected in a limiting manner; The second ring body, the third sub-ring body, and the fourth sub-ring body are combined to form an assembly cavity.
4. The ball bearing according to claim 1, characterized in that, The second ring assembly (2) includes a first sub-ring (201) and a second sub-ring (202), and the first ring assembly (1) includes a third sub-ring and a fourth sub-ring. The first sub-ring (201) and the second sub-ring (202) are connected in a limiting manner, and the third sub-ring and the fourth sub-ring are connected in a limiting manner. The first sub-ring body (201), the second sub-ring body (202), the third sub-ring body, and the fourth sub-ring body are combined to form an assembly cavity.
5. The ball bearing according to claim 2, characterized in that, The second ring assembly (2) further includes a positioning part (203), and the first sub-ring (201) and the second sub-ring (202) are fitted together along the positioning part (203).
6. The ball bearing according to claim 2, characterized in that, The ball bearing also includes a seal (4). The first ring assembly (1) and the second ring assembly (2) are each provided with a sealing groove (5) that cooperates with the seal (4). The sealing groove (5) is located at the contact end of the first ring assembly (1) and the second ring assembly (2). The seal (4) is located in the sealing groove (5) and forms the assembly cavity with the first ring assembly (1) and the second ring assembly (2).
7. The ball bearing according to claim 2, characterized in that, Mounting holes (10) are provided on the first ring body (101), the first sub-ring body (201), and the second sub-ring body (202). The mounting holes (10) are distributed along the circumferential direction and are distributed one-to-one with the axis of the ball bearing as the center.
8. A method for processing a ball bearing, the ball bearing comprising a first ring assembly (1), a second ring assembly (2), a ball (3), a spacer block, and a seal (4), the second ring assembly (2) comprising a first sub-ring (201) and a second sub-ring (202), the first ring assembly (1) and the second ring assembly (2) being combined to form an assembly cavity, the ball (3) being disposed in the assembly cavity; the spacer block being disposed in the assembly cavity at a distance from the ball (3); The method for machining the ball bearing is characterized in that, Includes the following steps: The first sub-ring body (201) and the second sub-ring body (202) are respectively machined to form the assembly cavity, the second oil groove and the positioning part (203), the second oil groove being provided at the bottom of the raceway; The corners of the second oil tank are rounded. Connecting holes (204) are machined on the first sub-ring body (201) and the second sub-ring body (202); The first sub-ring body (201) and the second sub-ring body (202) are connected by the positioning part (203) and connected by fasteners through the connecting hole (204) to form the second ring body assembly (2). The second ring body component (2) is subjected to quenching treatment; The second ring body assembly (2) after quenching is precision machined, and a sealing groove (5) and a mounting hole (10) are opened. The first ring body assembly (1) is processed to form the first raceway and the first oil groove of the assembly cavity; The end of the first ring assembly (1) with the first raceway and the first oil groove is subjected to quenching treatment; A shaft tooth (102) is machined at the end of the first ring assembly (1) away from the second ring assembly (2); The shaft teeth (102) are subjected to quenching treatment; The first ring body assembly (1) after quenching is precision machined, and a sealing groove (5) and a mounting hole (10) are opened. Disassemble the fasteners to separate the first sub-ring body (201) and the second sub-ring body (202). The sphere (3) and the isolation block are inserted into the assembly cavity formed by the first raceway and the second raceway; Reconnect the first sub-ring body (201) and the second sub-ring body (202), and embed the seal (4) into the sealing groove (5) to complete the assembly.
9. The method for processing a ball bearing according to claim 8, characterized in that, The quenching process employs a dual-sensor quenching system, including a first sensor (6), a second sensor (7), a first cooling head (8), and a second cooling head (9). The workflow of the dual-sensor quenching system is as follows: Place the first sensor (6) and the second sensor (7) at the starting position of the first raceway or the second raceway, with a spacing of ≤1.5mm; Both the first sensor (6) and the second sensor (7) preheat the first raceway or the second raceway using a frequency of f1; and satisfy 5000Hz≤f1≤8000Hz; Both the first sensor (6) and the second sensor (7) are adjusted to a heating frequency of f2, so that the first sensor (6) and the second sensor (7) move in opposite circumferential directions to scan the surface of the first raceway or the second raceway at a speed of 3-5 mm / s; and satisfy 2500Hz≤f2≤5000Hz; When the first sensor (6) and the second sensor (7) move, the corresponding first cooling head (8) and second cooling head (9) immediately spray coolant to quench the heated area; At the end point of the quenching process, the first sensor (6) and the second sensor (7) stop rotating when they come into contact. The heating frequency of the second sensor (7) is adjusted to f3 and the area is kept warm. Then the first sensor (6) and the second sensor (7) are withdrawn in sequence. The first cooling head (8) and the second cooling head (9) are brought together to complete the quenching of the end area, and the quenching satisfies 2500Hz≤f3≤5000Hz.
10. The method for processing a ball bearing according to claim 9, characterized in that, The first cooling head (8), the second cooling head (9), the first sensor (6) and the second sensor (7) are designed to mimic the shape of their surfaces, and their surface shapes are determined based on the curvature and rotation diameter of the first ring assembly (1), the first sub-ring (201) and the second sub-ring (202).