Prevention of eccentric operation of a servo motor

Abstract

This utility model discloses a servo motor for preventing eccentric operation, including a servo motor body, an end cover, and a spindle. The end cover is fixedly mounted on the front side of the servo motor body by bolts. The spindle is located inside the end cover. Two stabilizing plates are fixedly connected to the front side of the end cover. A mounting ring is fixedly connected to the inner side of the two stabilizing plates. A guide bearing is fixedly mounted on the inner wall of the mounting ring. The inner wall of the guide bearing is rotatably connected to the surface of the spindle. A clamping component is fixedly mounted on the rear side of the mounting ring. This utility model, by setting up stabilizing plates, mounting rings, and guide bearings, uses stabilizing plates to position the mounting rings and guide bearings on the surface of the spindle. The guide bearing is an NSK angular contact ball bearing, which can be used to limit the movement of the spindle. When the spindle drives the inner ring of the guide bearing to rotate, the stabilizing plates and guide bearings share the non-axial force generated by the spindle, preventing eccentric rotation of the spindle.

Description

Technical Field

[0001] This utility model relates to the field of servo motor technology, specifically to a servo motor for preventing eccentric operation. Background Technology

[0002] Servo motors, as high-precision and highly responsive electric drive devices, are widely used in high-end equipment manufacturing fields such as CNC machine tools, industrial robots, and automated production lines. Their core advantage lies in their ability to achieve precise angle, speed, and torque control through a closed-loop control system, ensuring the accuracy and repeatability of mechanical motion. However, in practical applications, due to factors such as unbalanced load, installation coaxiality deviation, bearing wear, or external impact vibration, servo motors often exhibit eccentric operation, that is, the rotor rotation axis is offset from the center of the stator magnetic field. This abnormal operating condition can lead to abnormal vibration and noise in the motor, and exacerbate the wear of bearings and transmission components. Utility Model Content

[0003] To address the problems mentioned in the background art, the purpose of this utility model is to provide a servo motor that prevents eccentric operation. It has the advantage of preventing eccentric rotation and solves the problem that in practical applications, due to factors such as unbalanced load, installation coaxiality deviation, bearing wear, or external impact vibration, the servo motor often exhibits eccentric operation, that is, the rotor rotation axis is offset from the center of the stator magnetic field. This abnormal operating condition will cause abnormal vibration and noise in the motor and aggravate the wear of bearings and transmission components.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a servo motor for preventing eccentric operation, comprising a servo motor body, an end cover, and a main shaft. The end cover is fixedly installed on the front side of the servo motor body by bolts. The main shaft is located inside the end cover. Two stabilizing plates are fixedly connected to the front side of the end cover. Mounting rings are fixedly connected to the inner sides of the two stabilizing plates. Guide bearings are fixedly installed on the inner walls of the mounting rings. The inner walls of the guide bearings are rotatably connected to the surface of the main shaft. A clamping component is fixedly installed on the rear side of the mounting rings.

[0005] As a preferred embodiment of this invention, the clamping assembly includes a fixing ring, and two pressure rollers are rotatably mounted on the rear side of the fixing ring via a shaft pin. The two pressure rollers are located on both sides of the main shaft, and the surfaces of the pressure rollers are in contact with the surface of the main shaft.

[0006] In a preferred embodiment of this invention, a transmission gear is fixedly mounted on the surface of the main shaft, two first connecting frames are fixedly connected to the front side of the end cover, the end of the pressure roller away from the fixed ring is rotatably connected to the front side of the first connecting frame through a bearing, two shafts are rotatably mounted on the front side of the end cover through a bearing, the other ends of the two shafts pass through the first connecting frame and are fixedly mounted with a synchronous roller, the surface of the synchronous roller is in contact with the surface of the pressure roller, a synchronous gear is fixedly mounted on the surface of the shaft, and the synchronous gear meshes with the transmission gear.

[0007] As a preferred embodiment of this utility model, a mounting bracket is fixedly connected to the inner side of the stabilizing plate, and a displacement sensor is fixedly installed at the bottom of the inner wall of the mounting bracket, with the probe of the displacement sensor facing the center of the main shaft.

[0008] As a preferred embodiment of this utility model, a second connecting frame is fixedly connected to the front side of the first connecting frame, the inner side of the second connecting frame is fixedly connected to the surface of the mounting ring, and the end of the shaft away from the end cover is rotatably connected to the inner wall of the second connecting frame through a bearing.

[0009] As a preferred embodiment of this invention, a coupling is fixedly mounted on the surface of the main shaft, and the coupling is configured as a cross-slider coupling.

[0010] As a preferred embodiment of this utility model, mounting bases are fixedly connected to both sides of the bottom of the servo motor body.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model uses a stabilizing plate, a mounting ring, and a guide bearing. The stabilizing plate positions the mounting ring and the guide bearing on the surface of the spindle. The guide bearing is an NSK angular contact ball bearing, which can limit the movement of the spindle. When the spindle drives the inner ring of the guide bearing to rotate, the stabilizing plate and the guide bearing share the non-axial force generated by the spindle, thus preventing the spindle from rotating eccentrically.

[0013] 2. By setting up a clamping component, the present invention can limit the movement of the pressure roller by using a fixing ring. At the same time, the surface of the pressure roller is in contact with the surface of the main shaft and is located on both sides of the main shaft, which can provide auxiliary limit for the main shaft, further improve the stability of the main shaft and avoid deformation.

[0014] 3. This utility model, by setting up a transmission gear, a first connecting frame, a shaft, a synchronous roller, and a synchronous gear, allows the first connecting frame to position the shaft and synchronous gear on the left and right sides of the transmission gear. This enables the main shaft to rotate, driving the transmission gear, shaft, and synchronous roller to rotate. Furthermore, the surface of the synchronous roller is in contact with the surface of the pressure roller, so the rotation of the synchronous roller can drive the pressure roller to rotate in the opposite direction. At this time, the pressure roller rotates in the same direction as the main shaft, avoiding friction. Simultaneously, the synchronous roller, in cooperation with the pressure roller, further stabilizes the main shaft. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a top view of the structure of this utility model;

[0017] Figure 3 This utility model Figure 2 Schematic diagram of the three-dimensional structure at point A in the middle;

[0018] Figure 4 This is a schematic diagram of the mounting bracket and displacement sensor structure of this utility model.

[0019] In the diagram: 1. Servo motor body; 2. End cover; 3. Main shaft; 4. Stabilizing plate; 5. Mounting ring; 6. Guide bearing; 7. Clamping assembly; 71. Fixing ring; 72. Pressure roller; 8. Transmission gear; 9. First connecting frame; 10. Shaft; 11. Synchronous roller; 12. Synchronous gear; 13. Mounting frame; 14. Displacement sensor; 15. Second connecting frame; 16. Coupling; 17. Mounting base. Detailed Implementation

[0020] 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.

[0021] like Figures 1 to 4 As shown, the present invention provides a servo motor for preventing eccentric operation, including a servo motor body 1, an end cover 2, and a main shaft 3. The end cover 2 is fixedly installed on the front side of the servo motor body 1 by bolts. The main shaft 3 is located inside the end cover 2. Two stabilizing plates 4 are fixedly connected to the front side of the end cover 2. Mounting rings 5 ​​are fixedly connected to the inner side of the two stabilizing plates 4. Guide bearings 6 are fixedly installed on the inner wall of the mounting rings 5. The inner wall of the guide bearings 6 is rotatably connected to the surface of the main shaft 3. A clamping component 7 is fixedly installed on the rear side of the mounting rings 5.

[0022] The clamping assembly 7 includes a retaining ring 71. Two pressure rollers 72 are rotatably mounted on the rear side of the retaining ring 71 via a shaft pin. The two pressure rollers 72 are located on both sides of the main shaft 3, and the surfaces of the pressure rollers 72 are in contact with the surface of the main shaft 3.

[0023] The main shaft 3 is fixedly connected to the rotor core and permanent magnet assembly inside the motor. The guide bearing 6 can guide the rotation and limit the movement of the main shaft 3 when it rotates. The pressure rollers 72 are symmetrically distributed on both sides of the main shaft 3 and are in contact with its surface, which can further prevent the main shaft 3 from eccentric operation.

[0024] Thus, a transmission gear 8 is fixedly mounted on the surface of the main shaft 3, and two first connecting frames 9 are fixedly connected to the front side of the end cover 2. The end of the pressure roller 72 away from the fixed ring 71 is rotatably connected to the front side of the first connecting frame 9 through a bearing. Two shafts 10 are rotatably mounted on the front side of the end cover 2 through a bearing. The other ends of the two shafts 10 pass through the first connecting frame 9 and are fixedly mounted with a synchronous roller 11. The surface of the synchronous roller 11 is in contact with the surface of the pressure roller 72. A synchronous gear 12 is fixedly mounted on the surface of the shaft 10 and meshes with the transmission gear 8.

[0025] The front side of the first connecting frame 9 is fixedly connected to the second connecting frame 15. The inner side of the second connecting frame 15 is fixedly connected to the surface of the mounting ring 5. The end of the shaft 10 away from the end cover 2 is rotatably connected to the inner wall of the second connecting frame 15 through a bearing.

[0026] The first connecting frame 9 and the second connecting frame 15 can stabilize the clamping roller and the synchronous roller 11. At the same time, the second connecting frame 15 can transmit the non-axial force of the main shaft 3 to the guide gear, which is then transmitted to the end cover 2 through the mounting ring 5, the second connecting frame 15 and the first connecting frame 9 in sequence, further improving the stability of the mounting ring 5 and the guide bearing 6.

[0027] In addition, a mounting bracket 13 is fixedly connected to the inner side of the stabilizing plate 4. A displacement sensor 14 is fixedly installed at the bottom of the inner wall of the mounting bracket 13. The probe of the displacement sensor 14 is facing the center of the spindle 3 and can monitor whether the spindle 3 has displacement.

[0028] A coupling 16 is fixedly mounted on the surface of the main shaft 3. The coupling 16 is a cross-slider coupling 16.

[0029] Mounting bases 17 are fixedly connected to both sides of the bottom of the servo motor body 1, which makes it easy to fix the servo motor body 1 in the designated working area.

[0030] The working principle and usage process of this utility model are as follows: In use, the servo motor body 1 is installed in the working area using the mounting base 17. When the servo motor body 1 starts, it drives the main shaft 3 to rotate. The rotation of the main shaft 3 drives the transmission gear 8, shaft 10, and synchronous roller 11 to rotate. The surface of the synchronous roller 11 is in contact with the surface of the pressure roller 72. Therefore, the rotation of the synchronous roller 11 drives the pressure roller 72 to rotate in the opposite direction. At this time, the pressure roller 72 rotates in the same direction as the main shaft 3, avoiding friction. Simultaneously, the synchronous roller 11 can... The main shaft 3 is limited in conjunction with the pressure roller 72 to prevent deformation of the main shaft 3. The second connecting frame 15 can connect the mounting ring 5 and the first connecting frame 9. When the main shaft 3 generates non-axial force, it can be transmitted to the end cover 2 through the guide bearing 6, the mounting ring 5, the second connecting frame 15 and the first connecting frame 9 in sequence, which further improves the stability of the guide bearing 6. The coupling 16 is set as a cross-slider coupling 16, which adds radial grooves to the traditional drum-shaped teeth, so that it retains the torque transmission capability and provides dynamic adjustment space.

[0031] Meanwhile, when the spindle 3 rotates, the stabilizing plate 4 and the guide bearing 6 share the non-axial force generated by the spindle 3, preventing the spindle 3 from rotating eccentrically. At the same time, the displacement sensor 14 can monitor the spindle 3. By transmitting the output terminal of the displacement sensor 14 to the display panel with the adapter conversion module through the shielded twisted pair cable, the user can know the operation status of the spindle 3 in a timely manner and check whether there is displacement or vibration in the components driven by the spindle 3.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] 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 servo motor for preventing eccentric operation, comprising a servo motor main body (1), an end cover (2) and a main shaft (3), characterized in that: The end cap (2) is fixedly installed on the front side of the servo motor body (1) by bolts. The main shaft (3) is located inside the end cap (2). Two stabilizing plates (4) are fixedly connected to the front side of the end cap (2). An installation ring (5) is fixedly connected to the inner side of the two stabilizing plates (4). A guide bearing (6) is fixedly installed on the inner wall of the installation ring (5). The inner wall of the guide bearing (6) is rotatably connected to the surface of the main shaft (3). A clamping component (7) is fixedly installed on the rear side of the installation ring (5).

2. The eccentricity prevention servo motor according to claim 1, wherein: The clamping assembly (7) includes a retaining ring (71), and two pressure rollers (72) are rotatably mounted on the rear side of the retaining ring (71) via a shaft pin. The two pressure rollers (72) are located on both sides of the main shaft (3), and the surfaces of the pressure rollers (72) are in contact with the surface of the main shaft (3).

3. The eccentricity-preventing servo motor according to claim 2, wherein: A transmission gear (8) is fixedly mounted on the surface of the main shaft (3). Two first connecting frames (9) are fixedly connected to the front side of the end cover (2). The end of the pressure roller (72) away from the fixed ring (71) is rotatably connected to the front side of the first connecting frame (9) through a bearing. Two shafts (10) are rotatably mounted on the front side of the end cover (2) through a bearing. The other ends of the two shafts (10) pass through the first connecting frame (9) and are fixedly mounted with a synchronous roller (11). The surface of the synchronous roller (11) is in contact with the surface of the pressure roller (72). A synchronous gear (12) is fixedly mounted on the surface of the shaft (10). The synchronous gear (12) meshes with the transmission gear (8).

4. The eccentricity prevention servo motor according to claim 1, wherein: The inner side of the stabilizing plate (4) is fixedly connected to a mounting bracket (13), and a displacement sensor (14) is fixedly installed at the bottom of the inner wall of the mounting bracket (13). The probe of the displacement sensor (14) is facing the center of the main shaft (3).

5. The eccentricity prevention servo motor according to claim 3, wherein: The front side of the first connecting frame (9) is fixedly connected to the second connecting frame (15), the inner side of the second connecting frame (15) is fixedly connected to the surface of the mounting ring (5), and the end of the shaft (10) away from the end cover (2) is rotatably connected to the inner wall of the second connecting frame (15) through a bearing.

6. The eccentricity prevention servo motor according to claim 1, wherein: A coupling (16) is fixedly mounted on the surface of the main shaft (3), and the coupling (16) is configured as a cross-slider coupling (16).

7. The eccentricity prevention servo motor according to claim 1, wherein: The servo motor body (1) has mounting bases (17) fixedly connected to both sides of its bottom.

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