Anti-loosening connection structure of metal shaft core

Abstract

This utility model discloses an anti-loosening connection structure for a metal shaft core, including a motor shaft core and an encoder. A docking assembly is provided between the end of the motor shaft core and the encoder. A fixing bolt connected to the inside of the motor shaft core is movably installed on the outside of the docking assembly. The docking assembly includes a connecting plate, a boss and a retaining ring located outside the boss are fixedly connected to the front side of the connecting plate, a retaining post is fixedly connected to the bottom of the encoder, the retaining post is movably engaged with the inside of the retaining ring, a guide frame is fixedly connected to the outside of the retaining ring, a retaining block is movably engaged inside the guide frame, a connecting rod is fixedly connected to the outside of the retaining block, and a spring is movably sleeved on the outside of the connecting rod. This anti-loosening connection structure for the metal shaft core can facilitate the disassembly and assembly of the encoder without disassembling the docking assembly, ensuring a stable connection.

Description

Technical Field

[0001] This utility model relates to the field of motor shaft technology, specifically to an anti-loosening connection structure for metal shafts. Background Technology

[0002] The shaft is one of the mechanical transmission and motion components, often referred to as the shaft center. The shaft encoder of a servo motor is used to provide feedback on the servo motor's rotation angle to the servo driver. The servo driver then controls the servo motor's rotation based on the feedback signal, forming a closed-loop control to achieve precise control of the servo motor's position and speed. It is used to analyze the motor's rotation angle and speed. Servo motors require feedback components for precise control; these components, such as optical encoders, rotary transformers, and magnetic encoders, must be connected to the shaft center.

[0003] The existing patent publication number CN 210490670 U discloses a motor shaft encoder connection structure, in which a threaded hole is provided at one end of the motor shaft, and a connecting hole that mates with the threaded hole is provided at one end of the fixing block. The threaded hole and the connecting hole are fixedly connected by screws, and the encoder is fixedly connected by a cylindrical boss. The segmented design can be used to install different styles of encoders, and only the fixing block needs to be replaced.

[0004] In the aforementioned patent, the fixing block is fixed to the encoder. When replacing the encoder, the fixing block needs to be removed together with the encoder. The fixing block can only be removed by removing the screws, which makes it difficult to quickly replace the encoder. It is quite troublesome to use. In addition, the rotational force of the shaft core is fully applied to the screw, which will cause the screw to rotate and loosen. That is, the internal and external threads will rotate relative to each other in the loosening direction, which is not stable enough. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a non-loosening connection structure for metal shaft cores, thereby facilitating encoder assembly and disassembly without disassembling the docking components and ensuring a stable connection.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an anti-loosening connection structure for a metal shaft core, comprising a motor shaft core and an encoder, wherein a docking assembly is provided between the end of the motor shaft core and the encoder, and a fixing bolt connected to the motor shaft core is movably installed on the outside of the docking assembly; the docking assembly includes a connecting plate, a boss and a retaining ring located outside the boss are fixedly connected to the front side of the connecting plate, a retaining post is fixedly connected to the bottom of the encoder, the retaining post is movably engaged with the inside of the retaining ring, a guide frame is fixedly connected to the outside of the retaining ring, a retaining block is movably engaged inside the guide frame, a connecting rod is fixedly connected to the outside of the retaining block, a spring is movably sleeved on the outside of the connecting rod, a retaining groove is opened on the side of the retaining post, and the retaining block is movably engaged inside the retaining groove.

[0007] Preferably, the guide frame is located on the outside of the retaining ring and is arranged symmetrically from top to bottom.

[0008] Preferably, the spring is located inside the guide frame, and a lever is fixedly connected to the outside of the spring.

[0009] Preferably, a limiting block is fixedly connected to the rear side of the connecting plate, and grooves are provided on both the left and right sides of the front side of the connecting plate. A keyway and a threaded hole are provided on the front side of the motor shaft. The limiting block is movably engaged inside the keyway. The groove corresponds to the threaded hole. The fixing bolt passes through the groove and is connected to the inside of the threaded hole. A mating groove is provided at the front of the connecting plate. A stop block is movably engaged inside the mating groove. A protrusion engaged in the mating groove is fixedly connected to the outside of the locking post.

[0010] Preferably, the protrusion is located inside the abutment, and the abutment abuts against the inside of the fixing bolt.

[0011] Preferably, the docking groove is located on the upper and lower sides of the front side of the connecting plate, and the docking groove is offset from the guide frame.

[0012] Preferably, the boss is movably engaged inside the encoder.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By pushing the lever, the connecting rod moves outward, which in turn moves the locking block within the guide frame. The locking pin at the bottom of the encoder is inserted into the locking ring. Releasing the lever causes the spring to push the locking block inward and lock it into the locking slot on the side of the locking pin for fixation. When disassembling the encoder, simply push the lever to disengage the locking block from the slot. The encoder can be easily and quickly replaced without disassembling the docking components, thus improving the convenience of operation.

[0015] 2. The outer side of the locking post is fixedly connected with a protrusion that is locked in the mating groove. When the locking post is inserted into the locking ring, the protrusion on the outer side of the locking post matches the notch of the locking ring and is embedded therein. The protrusion is locked in the mating groove and applies force to the abutment block from the inside, so that it abuts against the outer side of the fixing bolt, ensuring that the fixing bolt is firmly abutted and preventing the bolt from loosening due to rotational force. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is an exploded view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the limiting block of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the guide frame and the locking post of this utility model.

[0020] Figure 5 This is a cross-sectional structural diagram of the present invention when the protrusion is inserted into the docking groove.

[0021] In the diagram: 1. Motor shaft; 11. Keyway; 12. Threaded hole; 2. Connecting assembly; 21. Connecting disc; 22. Limiting block; 23. Groove; 24. Boss; 25. Snap ring; 26. Guide frame; 27. Snap block; 28. Connecting rod; 29. ​​Spring; 210. Toggle lever; 211. Connecting groove; 212. Abutment block; 3. Encoder; 31. Snap pin; 32. Snap groove; 33. Protrusion; 4. Fixing bolt. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This utility model provides a technical solution: an anti-loosening connection structure for a metal shaft core, including a motor shaft core 1 and an encoder 3. A docking assembly 2 is provided between the end of the motor shaft core 1 and the encoder 3. A fixing bolt 4 connected to the motor shaft core 1 is movably installed on the outside of the docking assembly 2. The docking assembly 2 includes a connecting plate 21. A boss 24 and a retaining ring 25 located outside the boss 24 are fixedly connected to the front side of the connecting plate 21. A retaining post 31 is fixedly connected to the bottom of the encoder 3. The retaining post 31 is movably engaged with the inside of the retaining ring 25. A guide frame 26 is fixedly connected to the outside of the retaining ring 25. A retaining block 27 is movably engaged inside the guide frame 26. The outside of the retaining block 27 is fixedly connected to... A connecting rod 28 is connected, and a spring 29 is movably sleeved on the outside of the connecting rod 28. A slot 32 is opened on the side of the locking post 31, and the locking block 27 is movably locked inside the slot 32. By pushing the lever 210, the connecting rod 28 is moved outward, which in turn moves the locking block 27 within the guide frame 26. The locking post 31 at the bottom of the encoder 3 is inserted into the retaining ring 25. The lever 210 is released, which causes the spring 29 to push the locking block 27 inward and lock it into the slot 32 on the side of the locking post 31 for fixation. When disassembling the encoder 3, simply push the lever 210 to disengage the locking block 27 from the slot 32. The encoder 3 can be easily and quickly replaced without disassembling the docking assembly 2, thereby improving the convenience of operation.

[0024] The guide frame 26 is located on the outside of the retaining ring 25 and is arranged symmetrically from top to bottom. The symmetrical arrangement can make the retaining post 31 more securely fixed in the retaining ring 25 and the force on the left and right sides more even, so as to avoid the encoder 3 from shifting or shaking during operation due to uneven force on one side.

[0025] The spring 29 is located inside the guide frame 26, and a lever 210 is fixedly connected to the outside of the spring 29. When the lever 210 is operated, the lever 210 can effectively drive the spring 29 to perform corresponding extension and retraction actions. Since the extension and retraction direction of the spring 29 is restricted by the guide frame 26, the spring 29 is prevented from deviating or twisting during the extension and retraction process, thus ensuring the stability and accuracy of the locking and unlocking action of the locking block 27 in the locking slot 32.

[0026] The boss 24 is movably engaged inside the encoder 3. The boss 24 and the encoder 3 are arranged on the same axis to ensure a high degree of concentricity during operation and reduce additional friction and vibration caused by misalignment.

[0027] Please see Figure 2 and Figure 5 A limiting block 22 is fixedly connected to the rear side of the connecting plate 21. Grooves 23 are provided on both the left and right sides of the front side of the connecting plate 21. A keyway 11 and a threaded hole 12 are provided on the front side of the motor shaft core 1. The limiting block 22 is movably engaged inside the keyway 11. The groove 23 corresponds to the threaded hole 12. The fixing bolt 4 passes through the groove 23 and is connected to the inside of the threaded hole 12. A docking groove 211 is provided at the front of the connecting plate 21. A stop block 212 is movably engaged inside the docking groove 211. A protrusion 33 is fixedly connected to the outside of the locking post 31 and is engaged in the docking groove 211. When the locking post 31 is inserted into the locking ring 25, the protrusion 33 on the outside of the locking post 31 matches the notch of the locking ring 25 and is embedded therein. The protrusion 33 is engaged in the docking groove 211 and applies force to the stop block 212 from the inside, so that it presses against the outside of the fixing bolt 4, ensuring that the fixing bolt 4 is firmly pressed and preventing the fixing bolt 4 from loosening due to rotational force.

[0028] The protrusion 33 is located inside the abutment 212, which abuts against the inside of the fixing bolt 4, enhancing the stability of the connection and effectively resisting the action of various complex stresses, reducing the safety hazards and equipment failures that may be caused by the loosening of the fixing bolt 4.

[0029] The mating grooves 211 are located on the upper and lower sides of the front side of the connecting plate 21. The mating grooves 211 and the guide frame 26 are staggered. The staggered mating grooves 211 and the guide frame 26 can avoid mutual interference. The guide frame 26 can guide the parts that it mates with, ensuring a smooth and accurate connection process. The design of the mating grooves 211 being distributed vertically allows the abutment 212 to abut against the fixing bolt 4 from both vertical and horizontal directions, further improving the stability of the fixing bolt 4.

[0030] Working principle: By correspondingly locking the limiting block 22 into the keyway 11, the groove 23 aligns with the threaded hole 12. Then, the fixing bolt 4 is screwed into the threaded hole 12 to connect and fix the connecting plate 21. By pushing the lever 210 outward, the connecting rod 28 moves outward, thereby moving the locking block 27 outward inside the guide frame 26. Then, by locking the locking post 31 at the bottom of the encoder 3 into the inner side of the retaining ring 25, the spring 29 pushes the locking block 27 inward and locks it into the corresponding slot 32 on the side of the locking post 31 after the lever 210 is released. The boss 24 is then locked into the encoder 3 to fix the encoder 3. When disassembling the encoder 3, the lever 210 is pulled to disengage the locking block 27 from the slot 32. The encoder 3 can be quickly and easily replaced without disassembling the docking assembly 2, improving ease of use.

[0031] When the locking post 31 is inserted into the retaining ring 25, the protrusion 33 on the outer side of the locking post 31 is engaged with the notch on the retaining ring 25, so that the protrusion 33 is engaged into the mating groove 211 at the notch position. The abutment 212 located on the outer side of the protrusion 33 is engaged in the mating groove 211. After the protrusion 33 is engaged in the mating groove 211, the abutment 212 is pressed against the outer side of the fixing bolt 4, so that the abutment 212 is pressed against the outer side of the fixing bolt 4. Together with the limiting block 22, it is engaged in the connecting plate 21, thereby tightening the fixing bolt 4 and preventing the rotational force from acting on the fixing bolt 4 and causing it to loosen. The above is the working process of the entire device. All contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A loosening prevention connection structure of a metal shaft core, comprising a motor shaft core (1) and an encoder (3), characterized in that: A docking assembly (2) is provided between the end of the motor shaft (1) and the encoder (3). A fixing bolt (4) connected to the motor shaft (1) is movably installed on the outside of the docking assembly (2). The docking assembly (2) includes a connecting plate (21). A boss (24) and a retaining ring (25) located outside the boss (24) are fixedly connected to the front side of the connecting plate (21). A retaining post (31) is fixedly connected to the bottom of the encoder (3). The retaining post (31) is movably engaged with the inside of the retaining ring (25). A guide frame (26) is fixedly connected to the outside of the retaining ring (25). A retaining block (27) is movably engaged inside the guide frame (26). A connecting rod (28) is fixedly connected to the outside of the retaining block (27). A spring (29) is movably sleeved on the outside of the connecting rod (28). A retaining groove (32) is opened on the side of the retaining post (31). The retaining block (27) is movably engaged inside the retaining groove (32).

2. The anti-loosening connection structure for a metal shaft core according to claim 1, characterized by: The guide frame (26) is located on the outside of the retaining ring (25) and is arranged symmetrically from top to bottom.

3. The anti-loosening connection structure for a metal shaft core according to claim 1, characterized by: The spring (29) is located inside the guide frame (26), and a lever (210) is fixedly connected to the outside of the spring (29).

4. The anti-loosening connection structure for a metal shaft core according to claim 1, characterized by: The rear side of the connecting plate (21) is fixedly connected to a limiting block (22). The left and right sides of the front side of the connecting plate (21) are provided with grooves (23). The front side of the motor shaft (1) is provided with a keyway (11) and a threaded hole (12). The limiting block (22) is movably engaged in the inside of the keyway (11). The groove (23) corresponds to the threaded hole (12). The fixing bolt (4) passes through the groove (23) and is connected to the inside of the threaded hole (12). The front part of the connecting plate (21) is provided with a docking groove (211). The inside of the docking groove (211) is movably engaged with a stop block (212). The outside of the locking post (31) is fixedly connected with a protrusion (33) that is engaged in the docking groove (211).

5. The anti-loosening connection structure for a metal shaft core according to claim 4, characterized by: The protrusion (33) is located inside the abutment (212), and the abutment (212) abuts against the inside of the fixing bolt (4).

6. The anti-loosening connection structure for a metal shaft core according to claim 4, characterized by: The docking groove (211) is located on the upper and lower sides of the front side of the connecting plate (21), and the docking groove (211) is offset from the guide frame (26).

7. The anti-unthreading connection structure for a metal shaft core according to claim 1, characterized by: The boss (24) is movably engaged inside the encoder (3).

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