A servo motor with quick-change bearing

Abstract

The utility model discloses a kind of servo motors of quick replacement bearing, including base and end cover, the inside of the base is provided with stator winding, the inside sleeve of stator winding is provided with permanent-magnetic rotor, the inside of permanent-magnetic rotor is provided with shaft, the inside of the base is provided with the encoder connected with shaft on one side, the outside of the shaft is provided with bearing, the inside of the end cover is provided with dismounting assembly, one side of the dismounting assembly is provided with sealing assembly;The utility model passes through the mutual cooperation between end cover, threaded tube, sleeve, wedge-shaped clamping block and spring A, so that the device is provided with a detachable threaded tube on end cover, the replacement of bearing can be completed without removing end cover, the dismounting time of multiple bolts on end cover when bearing is replaced is saved, while the abrasion when end cover and its fixed parts are repeatedly disassembled is reduced, prolongs the service life of component.

Description

Technical Field

[0001] This utility model relates to the field of servo motor technology, specifically to a servo motor with quickly replaceable bearings. Background Technology

[0002] As a core power actuator in industrial automation systems, servo motors have deeply penetrated key areas such as CNC machine tools, industrial robots, semiconductor wafer manufacturing equipment, new energy vehicle production lines, and precision medical equipment due to their high-precision speed control, accurate positioning, and stable torque output characteristics. In these application scenarios, servo motors are typically in a state of high-frequency, high-load, and long-term continuous operation. As the core component inside the motor that supports the rotor's rotation, the bearing directly bears the radial and axial loads of the rotor, and its operational stability and lifespan directly determine the overall performance of the servo motor.

[0003] A patent with authorization announcement number "CN209748320U" discloses an automotive motor with a quick-change bearing, which includes a stator, a rotor, a front cover, a rear cover, and a housing. The stator is installed inside the housing. The front cover is fixed to the front of the housing, and the rear cover is fixed to the rear of the housing. A front bearing housing is fixed inside the front cover, and the front bearing housing, the front outer cover, and the front inner cover form a front bearing chamber. A rear bearing housing is fixed inside the rear cover, and the rear bearing housing, the rear inner cover, and the rear bearing chamber form a rear bearing chamber. A main shaft passes through the front bearing, the rotor, and the rear bearing. A wave spring is provided between the rear of the rear bearing and the rear outer cover. The front and rear bearings are connected to the front and rear covers respectively through the front and rear bearing housings. The mating surface of each bearing housing with the corresponding front or rear cover is a frustum-shaped surface, and the difference in radius between the two ends of the frustum-shaped surface is greater than the single-sided air gap between the stator and the rotor. Both the front and rear bearing housings are flange frustum structures with cylindrical inner holes.

[0004] However, this device has the following shortcomings:

[0005] Servo motors require frequent start-stop and forward / reverse switching, resulting in severe bearing wear and regular bearing replacement. Currently, when replacing bearings in servo motors, the end cover must be removed before the bearings can be replaced, making the bearing replacement process overly cumbersome. The aforementioned device has not solved this problem either, leading to the need to disassemble multiple sets of bolts on the end cover for bearing replacement, which greatly reduces the efficiency of motor maintenance. Utility Model Content

[0006] The purpose of this invention is to provide a servo motor with quickly replaceable bearings to solve the existing problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a servo motor with quickly replaceable bearings, comprising a base and an end cover. The base has a stator winding inside, and a permanent magnet rotor is sleeved inside the stator winding. A shaft is provided on the inner side of the permanent magnet rotor. An encoder connected to the shaft is provided on one side inside the base. A bearing is provided on the outer side of the shaft. A disassembly and assembly assembly is provided on the inner side of the end cover. A sealing assembly is provided on one side of the disassembly and assembly assembly.

[0008] Preferably, the disassembly and assembly assembly includes a threaded tube, a sleeve, a wedge-shaped locking block, and a spring A. The threaded tube is located inside the end cap and is threadedly adapted to the end cap. Sleeves are provided at the top and bottom of the inner side of the threaded tube. Wedge-shaped locking blocks are fitted inside the inner sides of the two sets of sleeves. Spring A is provided on the opposite side of the two sets of wedge-shaped locking blocks. After the bearing is installed, it can be fixed inside the threaded tube for easy disassembly.

[0009] Preferably, the sealing assembly includes a screw cap, a receiving groove, guide rods, a sealing ring, a spring B, and a sealing groove. The screw cap is located on one side of the threaded tube. A receiving groove is formed at the edge of one side of the screw cap. Two sets of guide rods are sleeved on one side of the inner side of the receiving groove. A sealing ring is provided on one side of both sets of guide rods. A spring B is provided on the outer side of both sets of guide rods. A sealing groove that cooperates with the sealing ring is formed at the edge of one side of the end cap, which can improve the sealing performance at the connection between the end cap and the disassembly assembly.

[0010] Preferably, the outer side of the threaded tube is provided with an annular groove, and the inner side of the annular groove is provided with a rotating ring, and the inner side of the rotating ring is provided with a groove. The bottom of the wedge-shaped block is provided with a pull rope connected to the rotating ring, and the pull rope extends to the inner side of the groove. After the threaded tube and the bearing are removed, the wedge-shaped block can be pulled into the sleeve by rotating the rotating ring, and the bearing can then be removed from the threaded tube.

[0011] Preferably, a limiting block is provided on one side of the guide rod, and two sets of movable grooves that cooperate with the limiting block are provided on one side of the screw cap, which can provide the guide rod with moving space.

[0012] Preferably, a plurality of mounting holes are provided on one side of the base, and a plurality of fixing holes corresponding to the mounting holes are provided on the edge of one side of the end cover. A sealing strip is provided on the edge of one side of the end cover, which can improve the sealing performance at the connection between the end cover and the base.

[0013] Preferably, multiple sets of protruding edges are evenly arranged on one side of the inner side of the threaded tube, which can improve the fixing effect on the bearing after the threaded tube is fixed.

[0014] Compared with the prior art, the beneficial effects of this utility model are: a servo motor with a quickly replaceable bearing;

[0015] 1. Through the cooperation between the end cap, threaded tube, sleeve, wedge-shaped clamp and spring A, the device is equipped with a detachable threaded tube on the end cap, which allows the bearing to be replaced without removing the end cap. This saves time when disassembling and assembling multiple bolts on the end cap during bearing replacement, and also reduces wear on the end cap and its fixing parts during repeated disassembly and assembly, thus extending the service life of the components.

[0016] 2. Through the cooperation between the screw cap, storage groove, guide rod, sealing ring, spring B and sealing groove, after the threaded tube is tightened to fix the bearing, the screw cap can be tightly attached to one side of the end cover. The elastic force of spring B can improve the tightness of the fit between the sealing ring and the sealing groove, thereby improving the sealing performance at the connection between the end cover and the threaded tube. This improves the convenience of bearing replacement while ensuring the sealing performance of the end cover. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram of the structure at point A;

[0020] Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of the structure at point B.

[0021] In the diagram: 1. Frame; 11. Stator winding; 12. Permanent magnet rotor; 13. Shaft; 14. Encoder; 2. End cover; 3. Bearing; 4. Assembly / disassembly assembly; 41. Threaded tube; 42. Sleeve; 43. Wedge-shaped retainer; 44. Spring A; 5. Sealing assembly; 51. Screw cap; 52. Storage groove; 53. Guide rod; 54. Sealing ring; 55. Spring B; 56. Sealing groove. 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 1-4The present invention provides an embodiment of a servo motor with a quick-change bearing, comprising a base 1 and an end cover 2. The base 1 has multiple sets of mounting holes on one side, and the end cover 2 has multiple sets of fixing holes corresponding to the mounting holes on one side edge. A sealing strip is provided on one side edge of the end cover 2, which can improve the sealing performance at the connection between the end cover 2 and the base 1. A stator winding 11 is provided inside the base 1, and a permanent magnet rotor 12 is sleeved inside the stator winding 11. A shaft 13 is provided on the inner side of the permanent magnet rotor 12. An encoder 14 connected to the shaft 13 is provided on one side inside the base 1, and a bearing 3 is provided on the outer side of the shaft 13. A disassembly assembly 4 is provided on the inner side of the end cover 2, and a sealing assembly 5 is provided on one side of the disassembly assembly 4.

[0024] The disassembly and assembly assembly 4 includes a threaded tube 41, a sleeve 42, a wedge-shaped locking block 43, and a spring A44. The threaded tube 41 is located inside the end cap 2 and is threadedly adapted to the end cap 2. The top and bottom of the inner side of the threaded tube 41 are provided with sleeves 42. The inner side of the two sets of sleeves 42 is fitted with wedge-shaped locking blocks 43. The two sets of wedge-shaped locking blocks 43 are provided with spring A44 on the side away from each other. After the bearing is installed, the bearing can be fixed inside the threaded tube 41 for easy disassembly.

[0025] The outer side of the threaded tube 41 is provided with an annular groove, and the inner side of the annular groove is provided with a rotating ring, and the inner side of the rotating ring is provided with a groove. The bottom of the wedge-shaped block 43 is provided with a pull rope connected to the rotating ring, and the pull rope extends to the inner side of the groove. After the threaded tube 41 and the bearing are removed, the wedge-shaped block 43 can be pulled into the sleeve 42 by rotating the rotating ring. At this time, the bearing 3 can be taken out from the threaded tube 41. Multiple sets of protruding edges are evenly provided on one side of the inner side of the threaded tube 41, which can improve the fixing effect of the bearing 3 after the threaded tube 41 is fixed.

[0026] The sealing assembly 5 includes a screw cap 51, a receiving groove 52, a guide rod 53, a sealing ring 54, a spring B55, and a sealing groove 56. The screw cap 51 is located on one side of the threaded tube 41. A receiving groove 52 is provided on the edge of one side of the screw cap 51. Two sets of guide rods 53 are fitted on one side of the inner side of the receiving groove 52. A limit block is provided on one side of the guide rod 53. Two sets of movable grooves that cooperate with the limit block are provided on one side of the screw cap 51, which can provide movement space for the guide rods 53. A sealing ring 54 is provided on one side of both sets of guide rods 53. A spring B55 is provided on the outer side of both sets of guide rods 53. A sealing groove 56 that cooperates with the sealing ring 54 is provided on the edge of one side of the end cap 2, which can improve the sealing performance of the connection between the end cap 2 and the disassembly assembly 4.

[0027] Working principle: When the device is in use, after receiving the target command from the encoder 14, it is converted into a current signal of the stator winding 11, which generates a rotating magnetic field. The permanent magnet rotor 12 is driven by the attractive or repulsive force of the rotating magnetic field and rotates with the magnetic field, which drives the shaft 13 to rotate.

[0028] After the bearing 3 is installed, it can be inserted into the threaded tube 41. At this time, the two sets of wedge-shaped blocks 43 can overcome the elastic force of the spring A44 and be retracted into the sleeve 42. When the bearing 3 is inserted into the threaded tube 41, the wedge-shaped blocks 43 can pop out to prevent the bearing 3 from coming out of the threaded tube 41. When disassembling the bearing 3, simply rotate the screw cap 51 to pull the threaded tube 41 out from the inside of the end cap 2. At this time, the bearing 3 can be pulled out from the outside of the shaft 13 by the restriction of the two sets of wedge-shaped blocks 43. The bearing 3 can be quickly removed without removing the end cap 2.

[0029] When installing bearing 3, simply insert bearing 3 into the outside of shaft 13, and then tighten threaded tube 41 to the inside of end cap 2. The bearing 3 can be fixed by the inner convex edge of threaded tube 41, and the replacement of bearing 3 can be completed quickly.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A servo motor with quick-change bearings, comprising a base (1) and an end cover (2), characterized in that: The base (1) is provided with a stator winding (11) inside, and a permanent magnet rotor (12) is sleeved inside the stator winding (11). A shaft (13) is provided on the inner side of the permanent magnet rotor (12). An encoder (14) connected to the shaft (13) is provided on one side inside the base (1). A bearing (3) is provided on the outer side of the shaft (13). A disassembly assembly (4) is provided on the inner side of the end cover (2). A sealing assembly (5) is provided on one side of the disassembly assembly (4).

2. A servo motor with a quickly replaceable bearing according to claim 1, characterized in that: The disassembly and assembly assembly (4) includes a threaded tube (41), a sleeve (42), a wedge-shaped locking block (43), and a spring A (44). The threaded tube (41) is located inside the end cap (2) and is threadedly adapted to the end cap (2). The top and bottom of the inner side of the threaded tube (41) are provided with sleeves (42). The inner sides of the two sets of sleeves (42) are fitted with wedge-shaped locking blocks (43). The two sets of wedge-shaped locking blocks (43) are provided with spring A (44) on the side away from each other.

3. A servo motor with a quickly replaceable bearing according to claim 2, characterized in that: The sealing assembly (5) includes a screw cap (51), a receiving groove (52), a guide rod (53), a sealing ring (54), a spring B (55), and a sealing groove (56). The screw cap (51) is located on one side of the threaded tube (41). A receiving groove (52) is provided at the edge of one side of the screw cap (51). Two sets of guide rods (53) are sleeved on one side of the inner side of the receiving groove (52). A sealing ring (54) is provided on one side of both sets of guide rods (53). A spring B (55) is provided on the outer side of both sets of guide rods (53). A sealing groove (56) that cooperates with the sealing ring (54) is provided at the edge of one side of the end cap (2).

4. A servo motor with a quickly replaceable bearing according to claim 2, characterized in that: The outer side of the threaded tube (41) is provided with an annular groove, and the inner side of the annular groove is provided with a rotating ring, and the inner side of the rotating ring is provided with a groove. The bottom of the wedge-shaped block (43) is provided with a pull rope connected to the rotating ring, and the pull rope extends to the inner side of the groove.

5. A servo motor with a quickly replaceable bearing according to claim 3, characterized in that: A limiting block is provided on one side of the guide rod (53), and two sets of movable grooves that cooperate with the limiting block are provided on one side of the screw cap (51).

6. A servo motor with a quickly replaceable bearing according to claim 1, characterized in that: The base (1) has multiple sets of mounting holes on one side, and the end cover (2) has multiple sets of fixing holes corresponding to the mounting holes on one side edge. A sealing strip is provided on one side edge of the end cover (2).

7. A servo motor with a quickly replaceable bearing according to claim 2, characterized in that: Multiple sets of raised edges are evenly arranged on one side of the inner side of the threaded tube (41).

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