A shaft sleeve locking mechanism

Abstract

This utility model discloses a bushing locking mechanism, including a locking structure: an auxiliary structure is threadedly connected to one side of the locking structure; the locking structure includes a bushing body, a spring mounting groove, a disc spring, and an inclined push post; the spring mounting groove is opened in the inner cavity of the bushing body. The core of this utility model is to achieve reliable locking between the bushing and the shaft through the elastic deformation of the disc spring. The bushing body has multiple evenly distributed spring mounting grooves, each groove containing a mixed-layer disc spring, one end of which is connected to the inclined push post. During initial installation, the bushing body is screwed onto the shaft through its internal thread, completing the initial fixation. When the shaft enters the inner cavity of the bushing body, the disc spring is compressed, generating axial elastic force, further enhancing the locking force. The mixed-layer design of the disc spring generates uniform and sustained radial pressure during compression, ensuring that the inner wall of the bushing tightly adheres to the surface of the shaft.

Description

Technical Field

[0001] This utility model relates to the field of bearing-related mechanical technology, specifically a bushing locking mechanism. Background Technology

[0002] In mechanical transmission systems, bushings, as crucial components connecting shafts to bearings or other parts, directly impact the stability and service life of the entire transmission system through their locking reliability. Traditional bushing locking methods typically employ mechanical fastening techniques such as threaded connections, keyway fits, or interference fits. While existing bushing locking mechanisms are simple in structure, they are prone to loosening under vibration or dynamic load conditions, leading to gaps between the bushing and the shaft, affecting transmission accuracy, and even causing equipment failure.

[0003] Announcement No. CN207246255U discloses a locking bushing mechanism, including a shaft, bushing, inner bearing ring, outer bearing ring, balls, and a fixing pin. The fixing pin, after being engaged in a groove, has its upper surface flush with the inner bearing ring. The fixing pin has a slope, the upward direction of which is consistent with the rolling direction of the balls. An adjusting bolt can be screwed into the first threaded hole from the second threaded hole and then abuts against the outer convex surface of the extrusion section. When the shaft rotates, as the balls continuously pass through the extrusion section, some balls occasionally strike the front of the fixing pin, pushing the fixing pin into the groove. Thus, the shaft rotation locks the bushing, the inner bearing ring, and the shaft together.

[0004] Regarding the aforementioned prior art, the inventor believes that the following shortcomings exist: the locking bushing mechanism starts by rotating the shaft. When the balls continuously pass through the extrusion section, some balls sometimes hit the front of the fixing pin, thereby pushing the fixing pin into the groove. Thus, the shaft rotation locks the bushing with the bearing inner ring and the shaft. However, this device is prone to loosening under vibration or dynamic load conditions, resulting in a gap between the bushing and the shaft, affecting the transmission accuracy, and even causing equipment failure. Utility Model Content

[0005] The purpose of this utility model is to provide a bushing locking mechanism to solve the problem mentioned in the background art. In this locking bushing mechanism, the starting shaft rotates and the balls continuously pass through the extrusion part. Some balls sometimes hit the front part of the fixing pin, thereby pushing the fixing pin into the groove. Thus, the bushing is locked to the bearing inner ring and the shaft by the shaft rotation. However, this device is prone to loosening under vibration or dynamic load conditions, resulting in a gap between the bushing and the shaft, affecting the transmission accuracy, and even causing equipment failure.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a bushing locking mechanism, including a locking structure:

[0008] One side of the locking structure is threaded with an auxiliary structure;

[0009] The locking structure includes a bushing body, a spring mounting groove, a disc spring, and an inclined push post;

[0010] The spring mounting groove is formed in the inner cavity of the bushing body, the disc spring is fixedly installed in the inner cavity of the spring mounting groove, and the inclined push column is fixedly installed on one side of the disc spring.

[0011] Furthermore, multiple spring mounting slots are evenly arranged on the bushing body, and multiple disc springs are evenly arranged in the inner cavity of the bushing body. The disc springs have a hybrid stacked structure, and anti-slip textures are provided on the contact surface between the disc springs and the shaft.

[0012] Furthermore, the hybrid stacked structure of the disc springs includes at least one pair of disc springs stacked in the same direction and one pair of disc springs stacked in opposite directions.

[0013] Furthermore, the locking structure also includes internal threads and a sealing ring;

[0014] The internal thread is fixedly installed on the inner wall of the bushing body, and the sealing ring is installed on one side of the internal thread.

[0015] Furthermore, the internal thread and the shaft body are threaded together to fix the bushing body to the shaft body.

[0016] Furthermore, the locking structure also includes a protruding post and an external thread;

[0017] The protruding post is fixedly disposed at one end of the bushing body, and the external thread is fixedly disposed on the outside of the protruding post.

[0018] Furthermore, the auxiliary structure includes a rotating adjustment frame, a wedge-shaped block, and a screw thread;

[0019] The rotating adjustment frame is threaded to the outside of the external thread, the wedge block is fixedly installed on the inner wall of the rotating adjustment frame, and the turning thread is fixedly installed on the outer wall of the rotating adjustment frame.

[0020] Furthermore, the inclined wedge block cooperates with the inclined push column, and the inclined push column is driven to move axially by rotating the adjustment frame, thereby compressing the disc spring to achieve locking.

[0021] This utility model has the following beneficial effects:

[0022] I. This utility model features a locking structure, the core of which lies in achieving reliable locking between the bushing and the shaft body through the elastic deformation of disc springs. The bushing body has multiple evenly distributed spring mounting slots, each containing a composite disc spring, one end of which is connected to a beveled push post. During initial installation, the bushing body engages with the shaft body via internal threads, completing the initial fixation. As the shaft body enters the inner cavity of the bushing body, the disc springs compress, generating axial elastic force, further enhancing the locking force. The composite design of the disc springs generates uniform and sustained radial pressure during compression, ensuring the inner wall of the bushing tightly adheres to the shaft surface. The locking structure further improves the locking effect, preventing the bushing from slipping under vibration or load, making the bushing lock more reliable and less prone to loosening.

[0023] II. Based on the aforementioned beneficial effects, an auxiliary structure is also provided. When further tightening is required, the rotating adjustment frame of the auxiliary structure is screwed into the protruding post via an external thread, causing the wedge block to rotate. The inclined surface of the wedge block contacts the inclined surface push post, converting the rotational motion into axial thrust, which pushes the inclined surface push post to compress the disc spring. By adjusting the rotation angle of the rotating adjustment frame, the axial displacement of the wedge block can be controlled, thereby adjusting the compression degree of the disc spring and achieving stepless adjustment of the locking force. When the adjustment frame is rotated in the opposite direction, the wedge block retracts, the disc spring elastically recovers, pushing the inclined surface push post to reset, quickly releasing the locking state. No additional tools are required during the process, operation is simple, and the locking force can be quantitatively controlled, making it suitable for working conditions requiring frequent disassembly and assembly or dynamic loads. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0026] Figure 2 This is a schematic diagram of the main body connection of the locking structure bushing of this utility model;

[0027] Figure 3 This is a schematic diagram of the external threaded connection of the locking structure of this utility model;

[0028] Figure 4 This is a schematic diagram of the connection of the auxiliary structure rotation adjustment frame of this utility model.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] In the diagram: 1. Locking structure; 2. Auxiliary structure; 11. Bushing body; 12. Internal thread; 13. Sealing ring; 14. Protruding post; 15. External thread; 16. Spring mounting groove; 17. Disc spring; 18. Inclined push post; 21. Rotating adjustment frame; 22. Inclined wedge block; 23. Tightening thread. Detailed Implementation

[0031] 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.

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0033] Please see Figure 1-4 As shown, this utility model is a bushing locking mechanism, including a locking structure 1:

[0034] One side of the locking structure 1 is threaded with an auxiliary structure 2;

[0035] Locking structure 1 includes bushing body 11, spring mounting groove 16, disc spring 17 and inclined push column 18;

[0036] A spring mounting groove 16 is formed in the inner cavity of the bushing body 11, a disc spring 17 is fixedly installed in the inner cavity of the spring mounting groove 16, and an inclined push post 18 is fixedly installed on one side of the disc spring 17.

[0037] The bushing body 11, as the core component, has multiple spring mounting slots 16 in its inner cavity for fixing disc springs 17. The disc springs 17 are fixed in the mounting slots by pre-compression, and one side of them is connected to the inclined push post 18. When the inclined push post 18 is subjected to external force, it transmits pressure to the disc springs 17, causing them to compress further, thereby generating a locking force, ensuring a tight fit between the bushing and the shaft body, and preventing loosening.

[0038] Multiple spring mounting slots 16 are evenly arranged on the bushing body 11, and multiple disc springs 17 are evenly arranged in the inner cavity of the bushing body 11. The disc springs 17 have a hybrid stacked structure, and anti-slip textures are provided on the contact surface between the disc springs 17 and the shaft.

[0039] The even distribution of multiple spring mounting slots 16 and disc springs 17 provides balanced locking force, avoiding localized stress concentration. The disc springs 17 employ a hybrid stacking structure, combining unidirectional and counter-directional stacking methods to ensure both high elasticity and enhanced stability. The anti-slip textured design increases the friction between the disc springs 17 and the shaft contact surface, further improving the locking effect and preventing the bushing from slipping under vibration or load.

[0040] The hybrid stacked structure of the disc spring 17 includes at least one pair of disc springs stacked in the same direction and one pair of disc springs stacked in opposite directions.

[0041] The disc springs 17 stacked in the same direction can provide a large initial elastic force, while the disc springs 17 stacked in opposite directions enhance the stability and fatigue resistance of the system. This hybrid stacking method allows the disc springs 17 to respond quickly under axial pressure while maintaining long-term reliability, making them suitable for high-frequency or high-load working environments.

[0042] The locking structure 1 also includes an internal thread 12 and a sealing ring 13;

[0043] The internal thread 12 is fixedly installed on the inner wall of the bushing body 11, and the sealing ring 13 is installed on one side of the internal thread 12.

[0044] The internal thread 12 is used for threaded connection with the shaft body to achieve initial fixation of the bushing body 11. The sealing ring 13 is located on one side of the internal thread 12, which can prevent dust, liquid and other foreign objects from entering the bushing, protect the working environment of the disc spring 17 and the inclined push column 18, and extend the service life of the mechanism.

[0045] The internal thread 12 is threaded to the shaft body to fix the bushing body 11 to the shaft body.

[0046] By rotating the bushing body 11, its internal thread 12 engages with the external thread 15 on the shaft, completing the initial installation. This threaded connection method is simple and reliable, easy to disassemble and maintain, and provides a stable foundation for subsequent locking operations.

[0047] The locking structure 1 also includes a protrusion 14 and an external thread 15;

[0048] The protruding post 14 is fixedly disposed at one end of the bushing body 11, and the external thread 15 is fixedly disposed on the outside of the protruding post 14.

[0049] The protruding post 14 serves as the mounting base for the auxiliary structure 2, and its external thread 15 is used to connect the rotating adjustment frame 21. The design of the external thread 15 allows the auxiliary structure 2 to move axially by rotation, thereby driving the inclined push post 18 to compress the disc spring 17 and complete the locking action.

[0050] Working Principle: The core of the locking structure 1 lies in achieving reliable locking between the bushing and the shaft through the elastic deformation of the disc spring 17. The bushing body 11 has multiple evenly distributed spring mounting slots 16, each slot housing a hybrid disc spring 17, one end of which is connected to an inclined push post 18. During initial installation, the bushing body 11 is screwed onto the shaft via the internal thread 12, completing the initial fixation. When the shaft enters the inner cavity of the bushing body 11, the disc springs compress, generating axial elastic force, further enhancing the locking force. The hybrid design of the disc springs 17 generates uniform and sustained radial pressure during compression, ensuring the inner wall of the bushing tightly adheres to the shaft surface.

[0051] This step, through the setting of locking structure 1, further improves the locking effect, prevents the bushing from slipping under vibration or load, and makes the bushing locking more reliable and less prone to loosening.

[0052] Please see Figure 1-4 As shown, this embodiment, based on the above embodiment, also includes an auxiliary structure 2.

[0053] Auxiliary structure 2 includes a rotating adjustment frame 21, a wedge block 22, and a screw thread 23;

[0054] The rotating adjustment frame 21 is threaded to the outside of the external thread 15, the inclined wedge block 22 is fixedly installed on the inner wall of the rotating adjustment frame 21, and the screw thread 23 is fixedly installed on the outer wall of the rotating adjustment frame 21.

[0055] The wedge block 22 is fixed to the inner wall of the rotating adjustment frame 21, and its inclined surface contacts the inclined push column 18. When the rotating adjustment frame 21 rotates, the wedge block 22 pushes the inclined push column 18 to move axially, compressing the disc spring 17 and generating a locking force. The design of the screw thread 23 makes it easy for the operator to apply torque to achieve quick locking or unlocking.

[0056] The inclined wedge block 22 cooperates with the inclined push column 18. By rotating the adjustment frame 21, the inclined push column 18 is driven to move axially, thereby compressing the disc spring 17 to achieve locking.

[0057] The external thread 15 and the wedge block 22 provide adjustable locking force to adapt to different working conditions.

[0058] Working principle: When further tightening is required, the rotation adjustment frame 21 of auxiliary structure 2 is screwed into the protruding post 14 via the external thread 15, causing the wedge block 22 to rotate. The inclined surface of the wedge block 22 contacts the inclined push post 18, converting the rotational motion into axial thrust, which pushes the inclined push post 18 to compress the disc spring 17. By adjusting the rotation angle of the rotation adjustment frame 21, the axial displacement of the wedge block 22 can be controlled, thereby adjusting the compression degree of the disc spring 17 and achieving stepless adjustment of the tightening force. When the adjustment frame is rotated in the opposite direction, the wedge block 22 retracts, the disc spring 17 elastically recovers, and pushes the inclined push post 18 to reset, quickly releasing the tightening state. No additional tools are required during the process, the operation is simple, and the tightening force can be quantitatively controlled, making it suitable for working conditions that require frequent disassembly and assembly or dynamic loads.

[0059] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A bushing locking mechanism, characterized in that, Including locking structure (1): The locking structure (1) has an auxiliary structure (2) threadedly connected to one side. The locking structure (1) includes a bushing body (11), a spring mounting groove (16), a disc spring (17), and an inclined push column (18). The spring mounting groove (16) is opened in the inner cavity of the bushing body (11), the disc spring (17) is fixedly installed in the inner cavity of the spring mounting groove (16), and the inclined push column (18) is fixedly installed on one side of the disc spring (17).

2. The bushing locking mechanism according to claim 1, characterized in that: The spring mounting groove (16) is evenly provided on the bushing body (11) in multiple ways, and the disc spring (17) is evenly provided in the inner cavity of the bushing body (11) in multiple ways. The disc spring (17) is a hybrid stacked structure, and the disc spring (17) is provided with anti-slip texture on the contact surface with the shaft.

3. The bushing locking mechanism according to claim 2, characterized in that: The hybrid stacked structure of the disc spring (17) includes at least one pair of disc springs stacked in the same direction and one pair of disc springs stacked in opposite directions.

4. The bushing locking mechanism according to claim 1, characterized in that: The locking structure (1) also includes an internal thread (12) and a sealing ring (13); The internal thread (12) is fixedly disposed on the inner wall of the bushing body (11), and the sealing ring (13) is disposed on one side of the internal thread (12).

5. A bushing locking mechanism according to claim 4, characterized in that: The internal thread (12) is threaded to the shaft body to fix the bushing body (11) to the shaft body.

6. A bushing locking mechanism according to claim 1, characterized in that: The locking structure (1) also includes a protrusion (14) and an external thread (15). The protruding post (14) is fixedly disposed at one end of the bushing body (11), and the external thread (15) is fixedly disposed on the outside of the protruding post (14).

7. A bushing locking mechanism according to claim 6, characterized in that: The auxiliary structure (2) includes a rotating adjustment frame (21), a wedge block (22), and a screw thread (23). The rotating adjustment frame (21) is threaded to the outside of the external thread (15), the inclined wedge block (22) is fixedly disposed on the inner wall of the rotating adjustment frame (21), and the turning thread (23) is fixedly disposed on the outer wall of the rotating adjustment frame (21).

8. A bushing locking mechanism according to claim 7, characterized in that: The inclined wedge block (22) cooperates with the inclined push column (18), and the inclined push column (18) is driven to move axially by rotating the adjustment frame (21), thereby compressing the disc spring (17) to achieve locking.

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