Auxiliary tool for grinding double half inner rings of bearing

Abstract

The auxiliary tool comprises an outer sleeve and a matching sleeve, a center hole is formed in the center of the outer sleeve, the matching sleeve is in threaded fit with the center hole, a first flange is arranged at the end, away from the matching sleeve, of the outer sleeve, a second flange is formed on the peripheral wall of the matching sleeve, and the first flange and the second flange are in threaded fit with each other. A gasket is arranged between the first flange and the second flange and arranged on the matching sleeve in a sleeving mode, a positioning groove used for positioning the double-half inner ring is formed between the gasket and the first flange, a positioning column is arranged on the contact face of the outer sleeve and the gasket, and a positioning hole is formed in the position, corresponding to the positioning column, of the gasket. The positioning column is connected with an abutting spring, and the natural length of the abutting spring is larger than the length of the positioning column. The double-half-inner-ring synchronous machining device is simple in structure, achieves synchronous machining of double half inner rings, meanwhile has good machining precision, and guarantees machining consistency.

Description

Technical Field

[0001] This utility model relates to an auxiliary tooling for grinding the inner ring of a bearing with two halves. Background Technology

[0002] In numerous mechanical systems, three-point contact ball bearings, with their unique structural advantages, are widely used in aerospace, precision machine tools, and other fields with extremely high requirements for precision and stability. In these bearings, the inner ring typically employs a double-half-separated structure. This design better adapts to complex stress conditions and improves the overall performance of the bearing. To ensure assembly accuracy and consistency in the curvature center deviation of the two grooves, the machining of the combined double-half inner rings becomes a critical step. The traditional method is to glue the end faces of the inner rings together using metal adhesive. This method is based on the adhesive's viscosity and curing properties, hoping to use the adhesive force to tightly bond the two halves of the inner ring. However, in actual shaft connection processes, this method has revealed many problems. Because it is difficult to ensure a completely uniform distribution of the metal adhesive during application and curing, even slight thickness differences can lead to minor misalignment of the inner rings during bonding. While this misalignment may seem insignificant, it can cause serious consequences, the most obvious being misalignment. Once misalignment occurs, the bearing will experience uneven stress during operation, with some areas bearing excessive pressure while others receive insufficient stress. Prolonged exposure to this unbalanced stress state will not only accelerate bearing wear, but also easily lead to delamination and cracking, significantly shortening the bearing's service life and seriously affecting the reliability and stability of the entire mechanical system. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an auxiliary tooling for grinding double-half inner rings of bearings. It has a simple structure, achieves synchronous processing of the double-half inner rings, and has good processing accuracy, ensuring the consistency of processing.

[0004] To achieve the above objectives, this utility model provides an auxiliary tooling for grinding a double-half inner ring of a bearing, comprising an outer sleeve and a mating sleeve. The outer sleeve has a center hole, and the mating sleeve is threaded into the center hole. A first retaining edge is provided at the end of the outer sleeve away from the mating sleeve, and a second retaining edge is formed on the outer peripheral wall of the mating sleeve. A washer is provided between the first and second retaining edges, and the washer is fitted onto the mating sleeve. A positioning groove for positioning the double-half inner ring is formed between the washer and the first retaining edge. A positioning post is provided on the contact surface between the outer sleeve and the washer, and a positioning hole is provided on the washer corresponding to the position of the positioning post. A contact spring is connected to the positioning post, and the natural length of the contact spring is greater than the length of the positioning post.

[0005] The beneficial effects of this design are as follows: During fixing, the combination of the outer sleeve, mating sleeve, and washer significantly enhances the stability of the double inner rings. The double inner rings are cleverly positioned within the positioning groove between the first flange of the outer sleeve and the washer. The inner side of the first flange of the outer sleeve is in close contact with the half-inner ring, while the inner side of the second flange of the mating sleeve contacts the other half of the inner ring via a washer. This multi-directional contact fixing method greatly increases the fixing strength of the double inner rings compared to traditional methods, enabling them to withstand greater external forces during processing, improving machining load-bearing capacity, and effectively avoiding machining errors or even failures caused by insecure fixing. Because the double inner rings are stably fixed, they can be operated simultaneously during grinding. This allows both half-inner rings to be ground under the same processing conditions, ensuring consistent processing parameters, thereby improving the machining consistency of the double inner rings and ultimately enhancing machining accuracy. Both dimensional accuracy and surface roughness achieve higher standards, meeting the high-precision requirements of bearings. During the installation of the mating sleeve, the presence of the anti-collision spring allows the operator to clearly perceive the installation modulus between the mating sleeve and the outer sleeve. As the mating sleeve is gradually screwed into the outer sleeve, the anti-collision spring will compress to varying degrees depending on the tightness of the installation. Through this feedback, the operator can accurately grasp the installation progress, prevent the inner sleeve from being installed too forcefully and squeezing the gasket, protect the tooling components, and extend the service life of the tooling.

[0006] As a further feature of this invention, a limiting edge is provided circumferentially at the end of the second retaining edge facing the outer sleeve. The beneficial effect of this design is that, preferably, when the spring is fully compressed, the length of the spring is slightly greater than the thickness of the washer, allowing the limiting edge to also abut against the positioning washer, ensuring both the structural lifespan and the positioning stability of the washer.

[0007] As a further feature of this invention, the outer sleeve has a shallow groove around the positioning post, one end of the abutment spring is nested in the shallow groove, and the other end abuts against the second stop edge.

[0008] The advantages of this design are as follows: the shallow groove provides a precise initial positioning area for the contact spring, allowing it to be quickly and accurately placed during installation, greatly improving assembly efficiency. Furthermore, this positioning method effectively prevents the spring from shifting, tilting, or even falling off during operation, ensuring that the contact spring consistently performs its buffering and abutting functions stably, thereby guaranteeing the reliable operation of the entire device and extending its service life.

[0009] As a further feature of this invention, the outer jacket is provided with a weight-reducing groove corresponding to the first edge.

[0010] The beneficial effects of this design are as follows: This design directly reduces the weight of the outer casing, thereby reducing the load on the entire device and making it more lightweight and flexible during operation. It can effectively reduce energy consumption and improve work efficiency. From a cost control perspective, the reduction in weight means a reduction in the amount of material used. In large-scale production, it also reduces the pressure on the supporting structure, power components, etc., and extends the overall service life of the equipment. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0012] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0013] Figure 3 This is a partially enlarged cross-sectional view of the positioning post position in an embodiment of this utility model. Detailed Implementation

[0014] This utility model provides an embodiment of an auxiliary tooling for grinding the double-half inner ring of a bearing, such as... Figures 1 to 3As shown, the device includes an outer sleeve 1 and a mating sleeve 2. The outer sleeve 1 has a central hole, and the mating sleeve 2 is threaded into the central hole. A first retaining edge 11 is provided at the end of the outer sleeve 1 away from the mating sleeve 2. A second retaining edge 21 is formed on the outer peripheral wall of the mating sleeve 2. A washer 3 is provided between the first retaining edge 11 and the second retaining edge 21. The washer 3 is fitted onto the mating sleeve 2. A positioning groove for positioning the double-half inner ring is formed between the washer 3 and the first retaining edge 11. A positioning post 13 is provided on the contact surface between the outer sleeve 1 and the washer 3. A positioning hole is provided on the washer 3 corresponding to the position of the positioning post 13. A contact spring 4 is connected to the positioning post 13, and the length of the contact spring 4 is naturally greater than the length of the positioning post 13. The beneficial effect of this design is that, during fixing, the combined design of the outer sleeve 1, the mating sleeve 2, and the washer 3 greatly enhances the fixing stability of the double-half inner ring. The double inner rings are cleverly positioned within the positioning groove between the first flange 11 of the outer sleeve 1 and the washer 3. The inner side of the first flange 11 of the outer sleeve 1 is in close contact with the half inner ring, while the inner side of the second flange 21 of the mating sleeve 2 contacts the other half inner ring via a washer. This multi-directional contact fixing method significantly increases the fixing strength of the double inner rings compared to traditional fixing methods, enabling them to withstand greater external forces during processing, improving processing load-bearing capacity, and effectively avoiding processing errors or even processing failures caused by insecure fixing. Because the double inner rings can be stably fixed, they can be operated simultaneously during grinding. This allows both half inner rings to be ground under the same processing conditions, ensuring consistent processing parameters, thereby improving the processing consistency of the double inner rings and ultimately enhancing processing accuracy. Both dimensional accuracy and surface roughness can reach higher standards, meeting the high-precision requirements of bearings. During the installation of the mating sleeve 2, the presence of the anti-collision spring 4 allows the operator to clearly perceive the installation modulus between the mating sleeve 2 and the outer sleeve 1. As the inner sleeve 2 is gradually screwed into the outer sleeve 1, the contact spring 4 will compress to different degrees depending on the tightness of the installation. The operator can use this feedback to accurately grasp the installation progress, prevent the inner sleeve from being installed violently and squeezing the washer 3, protect the tooling components, and extend the service life of the tooling.

[0015] As a further feature of this embodiment, a limiting edge is provided circumferentially at the end of the second retaining edge 21 facing the outer sleeve 1. The advantage of this feature is that, preferably, when the spring is fully compressed, the length of the spring is slightly greater than the thickness of the washer 3, so that the limiting edge can also abut against the positioning washer 3, ensuring the service life of the structure while ensuring the positioning stability of the washer 3.

[0016] As a further feature of this embodiment, the outer sleeve 1 has a shallow groove circumferentially provided on the positioning post 13. One end of the abutment spring 4 is nested in the shallow groove, and the other end abuts against the second stop edge 21. The advantages of this design are: the shallow groove provides a precise initial positioning area for the abutment spring 4, allowing the spring to be quickly and accurately placed in position during installation, greatly improving assembly efficiency. Furthermore, this positioning method effectively prevents the spring from shifting, tilting, or even falling off during operation, ensuring that the abutment spring 4 can always stably perform its buffering and abutment functions, thereby guaranteeing the reliable operation of the entire device and extending its service life.

[0017] As a further feature of this embodiment, a weight-reducing groove 12 is provided on the outer jacket 1 corresponding to the first retaining edge 11. The beneficial effects of this feature are: the weight-reducing groove 12 directly reduces the weight of the outer jacket 1, reducing the load on the entire device, making it lighter and more flexible during operation, effectively reducing energy consumption, improving work efficiency, and from a cost control perspective, the reduction in weight means a reduction in material usage. In large-scale production, this also reduces the pressure on the supporting structure, power components, etc., extending the overall service life of the equipment.

[0018] 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. An auxiliary tooling for grinding a double-half inner ring of a bearing, comprising an outer sleeve and a mating sleeve, wherein a center hole is formed in the center of the outer sleeve, and the mating sleeve is threaded into the center hole, characterized in that: The outer sleeve has a first stop edge at the end away from the mating sleeve, and a second stop edge is formed on the outer peripheral wall of the mating sleeve. A washer is provided between the first stop edge and the second stop edge. The washer is fitted onto the mating sleeve. A positioning groove for positioning the double inner ring is formed between the washer and the first stop edge. A positioning post is provided on the contact surface between the outer sleeve and the washer. A positioning hole is provided on the washer corresponding to the position of the positioning post. A resisting spring is connected to the positioning post. The natural length of the resisting spring is greater than the length of the positioning post.

2. The auxiliary tool for grinding processing of the bearing double half inner ring according to claim 1, characterized in that: The second guard edge is provided with a limiting edge along the circumferential direction at the end facing the outer jacket.

3. The auxiliary tool for grinding processing of the bearing double half inner ring according to claim 1, characterized in that: The outer sleeve has a shallow groove around the positioning post, one end of the abutment spring is nested in the shallow groove, and the other end abuts against the second stop edge.

4. The auxiliary tool for grinding processing of the bearing double half inner ring according to claim 1, characterized in that: The outer jacket has a weight-reducing groove at the position corresponding to the first edge.

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