Locking structure of angular contact ball bearing based on pre-tightening force adjustment

Abstract

The utility model relates to mechanical technical field discloses the angular contact ball bearing locking structure based on pre -tightening force adjustment, including shaft shoulder, the shaft shoulder one end fixedly connected with the axle core, the axle core outer wall is pasted with the inner race, the inner race outer wall slidingly connected with the ball, the ball outer wall slidingly connected with the fixed ring, the ball outer wall slidingly connected with the outer ring, the outer ring outer wall is provided with the locking assembly, the locking assembly includes the washer, the washer is pasted in the outer ring outer wall, the outer ring inside is set up with the empty slot, the axle core outer wall is connected with the nut threadedly, the nut one end fixedly connected with the top ring, in the utility model, locking assembly utilizes the thread cooperation of nut and axle core and drives the top ring axial movement, can exert the controllable axial pre -tightening force to the inner race, realizes the accurate adjustment to bearing pre -tightening force, through setting up the empty slot in the bearing outer ring and cooperating the setting of washer, has improved the stability and the uniformity of locking.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and in particular to a locking structure for angular contact ball bearings based on preload adjustment. Background Technology

[0002] Angular contact ball bearings, as key fundamental components in precision mechanical transmission systems, are widely used in high-speed, high-precision CNC machine tools, electric spindles, and precision instruments due to their ability to simultaneously withstand combined radial and axial loads. In these applications, the bearing preload directly affects its stiffness, rotational accuracy, and service life. Therefore, angular contact ball bearing locking structures based on preload adjustment have become one of the core technologies for ensuring the performance and reliability of the entire transmission system.

[0003] In existing technologies, to adjust and control the preload of angular contact ball bearings, bearings are typically used in pairs with spacers. The technical principle is to machine inner and outer spacers of a specific length, and apply axial force by tightening the lock nut during bearing installation, causing axial displacement of the inner and outer rings of the bearing, thereby eliminating clearance and obtaining preload. Alternatively, wave springs or disc springs can be used to provide constant preload, or the preload can be set indirectly by measuring friction torque to control the tightening torque of the nut.

[0004] However, existing technologies suffer from insufficient precision or stability in preload adjustment. The existing technology uses washers directly on the outer wall of the bearing, which may shift due to vibration during use, making it difficult to maintain the optimal preload setting for a long period. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides a locking structure for angular contact ball bearings based on preload adjustment, aiming to improve the problems of insufficient preload adjustment accuracy or stability in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a locking structure for an angular contact ball bearing based on preload adjustment, comprising a shoulder, a shaft core fixedly connected to one end of the shoulder, an inner ring fitted to the outer wall of the shaft core, a ball slidably connected to the outer wall of the inner ring, a fixing ring slidably connected to the outer wall of the ball, an outer ring slidably connected to the outer wall of the ball, a locking component provided on the outer wall of the outer ring, and a protective component provided on the outer wall of the outer ring;

[0007] The locking assembly includes a washer that fits against the outer wall of the outer ring. A slot is provided inside the outer ring. A nut is threaded onto the outer wall of the shaft core. A top ring is fixedly connected to one end of the nut.

[0008] Furthermore, the protective component includes an inner shell, the inner wall of which is slidably connected to the inner wall of the outer ring, and an outer shell is slidably connected to the outer wall of the inner shell.

[0009] Furthermore, the outer wall of the inner ring is fitted to the outer wall of the shoulder.

[0010] Furthermore, the outer wall of the inner ring is attached to one end of the outer wall of the top ring.

[0011] Furthermore, the washer is disposed inside the empty groove.

[0012] Furthermore, the top ring is slidably connected to the outer wall of the shaft core.

[0013] Furthermore, the retaining ring is disposed between the inner ring and the outer ring to maintain the position of the rolling ball.

[0014] Furthermore, a gap is left between the inner wall of the inner shell and the inner wall of the inner ring.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the locking assembly uses the threaded engagement between the nut and the shaft core to drive the top ring to move axially, which can apply a controllable axial preload to the inner ring, thereby achieving precise adjustment of the bearing preload. This structure effectively improves the stability and uniformity of locking by opening a slot in the outer ring of the bearing and setting a washer. It not only enhances the rigidity and rotational accuracy of the bearing, but also significantly extends the service life of the bearing. At the same time, the structure is simple, easy to adjust, and has good applicability and reliability.

[0017] 2. In this utility model, the protective component utilizes the sliding fit between the inner shell and the outer shell to form a sealed protective space, which can effectively prevent dust and impurities from entering the bearing and avoid abnormal wear and corrosion during operation. This protective structure can fully protect the bearing assembly when not in use, maintain its initial accuracy and performance, and facilitate disassembly and storage, thereby improving the maintainability and ease of use of the bearing assembly. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the angular contact ball bearing locking structure based on preload adjustment proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the shaft core structure of the angular contact ball bearing locking structure based on preload adjustment proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the top ring portion of the locking structure for an angular contact ball bearing based on preload adjustment proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the inner shell structure of the angular contact ball bearing locking structure based on preload adjustment proposed in this utility model.

[0022] Figure 5 for Figure 3 Enlarged view of point A in the middle.

[0023] The attached diagram is labeled as follows: 1. Shoulder; 2. Outer ring; 3. Groove; 4. Nut; 5. Shaft core; 6. Outer shell; 7. Inner ring; 8. Top ring; 9. Ball bearing; 10. Retaining ring; 11. Washer; 12. Inner shell. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 An embodiment of this utility model provides a locking structure for an angular contact ball bearing based on preload adjustment, including a shoulder 1, a core 5 fixedly connected to one end of the shoulder 1, an inner ring 7 fitted to the outer wall of the core 5, the shoulder 1 for axial positioning and support of the bearing inner ring 7, the core 5 for mounting and fixing the bearing inner ring 7, a ball 9 slidably connected to the outer wall of the inner ring 7, a fixing ring 10 slidably connected to the outer wall of the ball 9, and an outer ring 2 slidably connected to the outer wall of the ball 9. The inner ring 7, outer ring 2, ball 9, and fixing ring 10 rotate together as a bearing assembly. A locking component and a protective component are provided on the outer wall of the outer ring 2.

[0026] The locking assembly includes a washer 11, which achieves precise adjustment of preload through different thicknesses. The washer 11 is attached to the outer wall of the outer ring 2. A slot 3 is provided inside the outer ring 2 to accommodate the washer 11 and achieve preload adjustment. A nut 4 is threadedly connected to the outer wall of the shaft core 5. The nut 4 provides axial locking force through the threaded connection. A top ring 8 is fixedly connected to one end of the nut 4. The top ring 8 transmits the locking force of the nut 4 to the inner ring 7 of the bearing.

[0027] Specifically, according to the preload, select washer 11 and place it into the slot 3 inside the outer ring 2 of the bearing. Then push the second bearing in and tighten it. Finally, according to the preload, screw nut 4 into the outer wall of shaft core 5 and push the top ring 8 into the outer wall of the inner ring 7 of the bearing to lock it. This achieves the effect of changing different washers 11 and nuts 4 to different tightening degrees according to different preloads.

[0028] Reference Figure 1 - Figure 5 The protective assembly includes an inner shell 12, which serves as the inner protective structure of the bearing assembly. The inner wall of the inner shell 12 is slidably connected to the inner wall of the outer ring 2. The outer wall of the inner shell 12 is slidably connected to an outer shell 6, which serves as the outer protective structure of the bearing assembly. The outer wall of the inner ring 7 is attached to the outer wall of the shoulder 1 and to one end of the outer wall of the top ring 8. A washer 11 is disposed inside the slot 3. The top ring 8 is slidably connected to the outer wall of the shaft core 5. The fixing ring 10 is disposed between the inner ring 7 and the outer ring 2 to maintain the position of the ball 9. A gap is left between the inner wall of the inner shell 12 and the inner wall of the inner ring 7.

[0029] Specifically, the bearing is placed inside the inner housing 12, and then the outer housing 6 is placed on top of the inner housing 12. This effectively prevents dust and impurities from entering the bearing and avoids abnormal wear and corrosion during operation. This protective structure can fully protect the bearing assembly when it is not in use, maintaining its initial accuracy and performance.

[0030] Working principle: When this structure is needed, first push the inner ring 7 of the bearing into the outer wall of the shaft core 5, to the shoulder 1, and then push in the other bearing to fit together. A ball bearing 9 is slidably connected between the inner ring 7 and the outer ring 2. The ball bearing 9 is positioned between the inner ring 7 and the outer ring 2 using a retaining ring 10. When the locking assembly is needed, before pushing in the second bearing, select the washer 11 according to the preload and place it into the slot 3 inside the outer ring 2 of the bearing. Then push in the second bearing to fit tightly. Finally, use the locking assembly according to the preload. Screw nut 4 into the outer wall of shaft core 5, push top ring 8 into and lock it against the outer wall of inner ring 7 of bearing. When removing, first loosen nut 4 to release the pressure on the outer wall of inner ring 7, then use a tool to pull out the bearing, remove washer 11 inside empty groove 3 to store bearing assembly. When the protective assembly is needed, first place the bearing inside inner shell 12, then cover inner shell 6 on top of inner shell 12 to protect the internal bearing assembly from wear and ensure its accuracy. When needed, open outer shell 6 to take out the bearing assembly inside inner shell 12.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A locking structure for an angular contact ball bearing based on preload adjustment, comprising a shoulder (1), characterized in that: One end of the shoulder (1) is fixedly connected to the shaft core (5), the outer wall of the shaft core (5) is fitted with an inner ring (7), the outer wall of the inner ring (7) is slidably connected to a ball (9), the outer wall of the ball (9) is slidably connected to a fixing ring (10), the outer wall of the ball (9) is slidably connected to an outer ring (2), the outer wall of the outer ring (2) is provided with a locking component, and the outer wall of the outer ring (2) is provided with a protective component; The locking assembly includes a washer (11), which is attached to the outer wall of the outer ring (2). A slot (3) is provided inside the outer ring (2). A nut (4) is threaded onto the outer wall of the shaft core (5). A top ring (8) is fixedly connected to one end of the nut (4).

2. The locking structure for angular contact ball bearings based on preload adjustment according to claim 1, characterized in that: The protective assembly includes an inner shell (12), the inner wall of which is slidably connected to the inner wall of the outer ring (2), and an outer shell (6) slidably connected to the outer wall of the inner shell (12).

3. The angular contact ball bearing locking structure based on preload adjustment according to claim 1, characterized in that: The outer wall of the inner ring (7) is attached to the outer wall of the shoulder (1).

4. The angular contact ball bearing locking structure based on preload adjustment according to claim 1, characterized in that: The outer wall of the inner ring (7) is attached to one end of the outer wall of the top ring (8).

5. The angular contact ball bearing locking structure based on preload adjustment according to claim 1, characterized in that: The washer (11) is disposed inside the empty groove (3).

6. The angular contact ball bearing locking structure based on preload adjustment according to claim 1, characterized in that: The top ring (8) is slidably connected to the outer wall of the shaft core (5).

7. The angular contact ball bearing locking structure based on preload adjustment according to claim 1, characterized in that: The fixing ring (10) is disposed between the inner ring (7) and the outer ring (2) to maintain the position of the rolling ball (9).

8. The angular contact ball bearing locking structure based on preload adjustment according to claim 2, characterized in that: There is a gap between the inner wall of the inner shell (12) and the inner wall of the inner ring (7).

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