A speed reduction motor with shaft core positioning structure

Abstract

The application belongs to the technical field of speed reduction motors, and specifically discloses a speed reduction motor with a shaft core positioning structure, which comprises a speed reduction motor, wherein the speed reduction motor comprises a rear end cover and a front end cover, a first inner cavity is formed in the interior of the rear end cover, a second inner cavity is formed in the interior of the front end cover, an output shaft is rotatably installed in the interior of the first inner cavity, the surface of the output shaft movably penetrates through the front end cover, a protruding plate is fixedly arranged at the top end of the surface of the front end cover close to the rear end cover, and a positioning mechanism is arranged below the protruding plate. Through the positioning mechanism, the fixed strip and the support can erect the positioning cylinder on the radial outer side of the output shaft, the rotation feature of the positioning cylinder can limit the radial deviation of the output shaft, the stable radial constraint of the output shaft is provided, the separation and combination operation of the rear end cover and the front end cover is simple, the positioning mechanism can automatically loosen the output shaft after being separated, and the output shaft and the internal gear set can be conveniently observed and maintained.

Description

Technical Field

[0001] This invention belongs to the field of geared motor technology, and specifically discloses a geared motor with a shaft core positioning structure. Background Technology

[0002] A geared motor is a power transmission device that integrates an electric motor and a speed reducer into one unit. Its core function is to increase output torque while reducing output speed, thereby meeting the equipment's demand for low-speed, high-torque power.

[0003] In existing geared motors, the output shaft is usually only radially positioned by bearings. When subjected to alternating loads, high-speed operation, or external vibration, radial misalignment is prone to occur. Some geared motors add additional bushings or fixed brackets to enhance radial constraint. However, when the gear set or output shaft inside the geared motor needs to be inspected or maintained, the bushings or fixed brackets must be completely disassembled to accurately maintain the gear set or output shaft, making the operation cumbersome, time-consuming, and costly. Summary of the Invention

[0004] In view of this, the purpose of this invention is to propose a geared motor with a shaft core positioning structure to solve the problem that the output shaft of the prior art usually relies solely on bearings for radial positioning, which is prone to radial displacement when subjected to alternating loads, high-speed operation, or external vibration. Some geared motors add additional bushings or fixed brackets to enhance radial constraint, but when the gear set or output shaft inside the geared motor needs to be inspected and maintained, the bushings or fixed brackets must be completely disassembled to accurately maintain the gear set or output shaft, which makes the operation cumbersome, time-consuming, and costly.

[0005] To achieve the above objectives, the present invention provides a geared motor with a shaft positioning structure, comprising a geared motor, the geared motor including a rear end cover and a front end cover, the rear end cover and the front end cover cooperating with each other, the rear end cover having a first inner cavity inside, the front end cover having a second inner cavity inside, an output shaft being rotatably mounted inside the first inner cavity, the surface of the output shaft movably penetrating through the front end cover, a protruding plate being fixedly provided on the top end of the rear end cover near the surface of the front end cover, a positioning mechanism being provided below the protruding plate, and an insertion groove being provided on the top end of the front end cover near the surface of the rear end cover;

[0006] The positioning mechanism includes two fixing plates, which are respectively installed on both sides of the output shaft. Fixing strips are fixedly installed on both sides of the fixing plates, and brackets are installed on the upper and lower end faces of the fixing strips. A positioning cylinder is rotatably installed between the two opposing brackets.

[0007] In the above technical solution, preferably, a second movable groove is provided on both sides inside the protruding plate, a swing arm is fixedly installed on the top of the fixed plate away from the output shaft, a positioning frame is fixedly installed on both ends of the bottom of the protruding plate, the surface of the swing arm near the top is installed in the positioning frame through a rotating shaft, and the top of the swing arm is movably inserted into the second movable groove.

[0008] In the above technical solution, preferably, a first movable groove is formed at the middle of the protruding plate, the first movable groove is located between two second movable grooves, a connecting groove is formed on the surface of the swing arm inside the second movable groove, an L-shaped rod is mounted on the surface of the connecting groove via a rotating shaft, a connecting rod is fixedly connected to the other end of the L-shaped rod, the surface of the connecting rod penetrates the second movable groove, the other end of the connecting rod is installed in the first movable groove, a pressing block is fixedly installed on the end face of the connecting rod installed inside the first movable groove, and a tension spring is connected between the L-shaped rod and the inner wall of the second movable groove.

[0009] In the above technical solution, preferably, a connector strip is fixedly installed inside the connector groove, the surface of the connector strip is movably inserted into the first movable groove, the end of the connector strip corresponds to the two extrusion blocks, and the end face of the connector strip near the rear end cover is provided with an inclined edge.

[0010] In the above technical solution, preferably, a sleeve is provided on the outer surface of the rear cover near the front cover, and a guide post is provided on the surface of the front cover near the rear cover, with the surface of the guide post being movably inserted into the sleeve.

[0011] In the above technical solution, preferably, a first support frame and a second support frame are arranged and installed at the bottom of the rear end cover, a third support frame is installed at the bottom of the front end cover, the second support frame is installed between the first support frame and the third support frame, a base is fixedly installed at the bottom of the first support frame and the second support frame, the bottom of the third support frame is slidably installed on the surface of the base, a guide rod is provided on the surface of the third support frame near the second support frame, the surface of the guide rod moves through the first support frame and the second support frame, a threaded groove is provided at the end of the guide rod, and a positioning nut is fitted on the surface of the threaded groove.

[0012] In the above technical solution, preferably, a locking plate is fixedly installed on the surface of the output shaft, and two protrusions are symmetrically installed on the surface of the locking plate. A turntable is rotatably installed in the inner cavity of the second inner cavity. A locking groove is opened on the surface of the turntable, and two grooves are symmetrically opened on the inner wall of the locking groove. The two grooves respectively cooperate with the two protrusions.

[0013] In the above technical solution, preferably, a sealing ring is provided at the connection between the rear end cover and the front end cover.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Through the ingenious design of the positioning mechanism, the fixing bar and bracket set the positioning cylinder on the radial outside of the output shaft. The rotation characteristics of the positioning cylinder can limit the radial offset of the output shaft without affecting its normal rotation, thus providing a stable radial constraint for the output shaft.

[0016] The precise engagement of the locking plate on the output shaft surface with the locking groove, protrusion and groove of the turntable in the second inner cavity of the front cover forms a circumferential constraint, which further ensures the stability of the output shaft core and effectively prevents the output shaft from radially shifting due to load fluctuations, vibrations, etc. during rotation, thus ensuring the stability and accuracy of the geared motor output.

[0017] The separation and assembly of the rear cover and the front cover are simple. When maintenance is required, the positioning mechanism will automatically release the output shaft after separation, and the locking plate will separate from the locking slot. The staff can easily observe and maintain the output shaft and the internal gear set, which reduces the difficulty and cost of maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the rear cover and front cover in a separated state according to the present invention;

[0020] Figure 3 This is a schematic diagram of the rear cover structure of the present invention;

[0021] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a front sectional view of the positioning mechanism of the present invention;

[0023] Figure 6 This is a schematic diagram of the front cover structure of the present invention;

[0024] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0025] Figure 8 This is a schematic diagram of the internal structure of the front cover of the present invention.

[0026] In the diagram: 1. Gear motor; 2. Rear end cover; 3. Front end cover; 4. First support frame; 5. Second support frame; 6. Third support frame; 7. Base; 8. Guide rod; 9. First inner cavity; 10. Output shaft; 11. Positioning mechanism; 12. Protruding plate; 13. First movable groove; 14. Second movable groove; 15. Extrusion block; 16. Connecting rod; 17. L-shaped rod; 18. Swing arm; 19. Positioning frame; 20. Connecting groove; 21. Fixing plate; 22. Fixing strip; 23. Bracket; 24. Positioning cylinder; 25. Locking plate; 26. Protrusion; 27. Second inner cavity; 28. Locking groove; 29. ​​Groove; 30. Insertion groove; 31. Insertion strip; 32. Inclined edge. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0029] like Figures 1-8 The geared motor shown includes a geared motor 1, which includes a rear end cover 2 and a front end cover 3. The rear end cover 2 and the front end cover 3 cooperate with each other. The rear end cover 2 has a first inner cavity 9, and the front end cover 3 has a second inner cavity 27. An output shaft 10 is rotatably mounted inside the first inner cavity 9. The surface of the output shaft 10 moves through the front end cover 3. A protruding plate 12 is fixedly provided on the top of the rear end cover 2 near the surface of the front end cover 3. A positioning mechanism 11 is provided below the protruding plate 12. An insertion groove 30 is provided on the top of the front end cover 3 near the surface of the rear end cover 2. The geared motor 1 transmits high-speed, low-torque power from the motor rotor through multi-stage gear meshing. The transmission ratio is used to reduce the output speed of the output shaft 10. The geared motor 1, through the cooperation of the rear end cover 2 and the front end cover 3, makes the first inner cavity 9 and the second inner cavity 27 form a closed inner cavity, providing a stable installation space for the output shaft 10 and the gear set. At the same time, it integrates the deceleration function and the shaft positioning function, eliminating the need for additional positioning devices, simplifying the overall structure and saving installation space.

[0030] The positioning mechanism 11 includes two fixing plates 21, which are respectively installed on both sides of the output shaft 10. Fixing strips 22 are fixedly installed on both sides of the fixing plates 21. Brackets 23 are installed on the upper and lower end faces of the fixing strips 22. A positioning cylinder 24 is rotatably installed between the two opposing brackets 23. By setting the positioning mechanism 11, the fixing strips 22 and brackets 23 support the positioning cylinder 24 on the radially outer side of the output shaft 10. Through the rotation characteristics of the positioning cylinder 24, the radial offset of the output shaft 10 can be limited without affecting its normal rotation, laying the foundation for subsequent accurate positioning.

[0031] The protruding plate 12 has two second movable slots 14 on both sides inside. A swing arm 18 is fixedly installed on the top of the fixed plate 21 away from the output shaft 10. Positioning frames 19 are fixedly installed at both ends of the bottom of the protruding plate 12. The surface of the swing arm 18 near the top is installed in the positioning frame 19 through a rotating shaft. The top of the swing arm 18 is movably inserted into the second movable slot 14. The second movable slot 14 provides a clear motion trajectory constraint for the top of the swing arm 18, restricting the swing arm 18 to swing in a directional manner only within the second movable slot 14. The positioning frame 19 fixes the rotation fulcrum of the swing arm 18 through a rotating shaft, so that the movement of the swing arm 18 revolves around the rotating shaft inside the positioning frame 19, forming a stable lever structure and ensuring accurate force transmission direction.

[0032] A first movable groove 13 is formed at the middle of the protruding plate 12, which is located between two second movable grooves 14. A connecting groove 20 is formed on the surface of the swing arm 18 inside the second movable groove 14. An L-shaped rod 17 is mounted on the surface of the connecting groove 20 via a rotating shaft. A connecting rod 16 is fixedly connected to the other end of the L-shaped rod 17. The surface of the connecting rod 16 penetrates the second movable groove 14, and the other end of the connecting rod 16 is installed in the first movable groove 13. A pressing block 15 is fixedly installed on the end face of the connecting rod 16 inside the first movable groove 13. A tension spring is connected between the L-shaped rod 17 and the inner wall of the second movable groove 14. The tension spring generates tension in its natural state, driving the L-shaped rod 17 to move towards the first movable groove 13. The L-shaped rod 17 is connected to the second movable groove 14 via a rotating shaft. The connecting groove 20 of the swing arm 18 is linked, causing the swing arm 18 to rotate around the pivot in the positioning frame 19. At this time, the top of the swing arm 18 shifts towards the center in the second movable groove 14, and the bottom of the swing arm 18 swings away from the output shaft 10. When the pressing block 15 receives the pressing force and moves to the side of the first movable groove 13, the pressing block 15 drives the connecting rod 16 to move outward from the second movable groove 14, thereby pulling the L-shaped rod 17 to overcome the tension of the tension spring and move away from the center of the protrusion plate 12. The L-shaped rod 17 pushes the swing arm 18 to rotate in the opposite direction around the pivot in the positioning frame 19 through the connecting groove 20. The top of the swing arm 18 shifts outward in the second movable groove 14, and the bottom of the swing arm 18 swings towards the output shaft 10.

[0033] An insert strip 31 is fixedly installed inside the insert groove 30. The surface of the insert strip 31 is movably inserted into the first movable groove 13. The end of the insert strip 31 corresponds to the two pressing blocks 15. The end face of the insert strip 31 near the rear cover 2 is provided with an inclined edge 32. When the rear cover 2 and the front cover 3 are installed together, the insert strip 31 will be inserted into the first movable groove 13 of the protruding plate 12 of the rear cover 2, and its end will correspond to the two pressing blocks 15 in the first movable groove 13. The end face of the insert strip 31 near the rear cover 2 is provided with an inclined edge 32. During the insertion process, the inclined edge 32 will first contact the pressing blocks 15. The contact generates a squeezing effect. As the insert strip 31 continues to be inserted, the squeezing force of the inclined edge 32 on the squeezing block 15 gradually increases, pushing the two squeezing blocks 15 to move to both sides of the first movable groove 13. When the squeezing blocks 15 move, they drive the connecting rod 16 and the L-shaped rod 17 to move together, which eventually causes the bottom of the swing arm 18 to move the positioning cylinder 24 closer to the output shaft 10 and clamp it, thus achieving the positioning of the shaft core of the output shaft 10. When the rear cover 2 and the front cover 3 separate, the insert strip 31 exits the first movable groove 13, the squeezing force of the squeezing block 15 disappears, and under the action of the tension spring, the positioning cylinder 24 resets and releases the output shaft 10.

[0034] A sleeve is provided on the outer surface of the rear cover 2 near the front cover 3, and a guide post is provided on the surface of the front cover 3 near the rear cover 2. The surface of the guide post is movably inserted into the sleeve. The sleeve of the rear cover 2 has a hollow structure, and the guide post of the front cover 3 has a matching columnar structure. When the rear cover 2 and the front cover 3 approach each other or are assembled, the surface of the guide post can slide axially along the inner wall of the sleeve to form a movable insertion fit, thereby realizing the relative positioning and guidance between the two. The insertion fit between the guide post and the sleeve provides clear axial and radial constraints for the docking of the rear cover 2 and the front cover 3, avoiding offset or misalignment during assembly or relative movement, and ensuring the coaxiality and assembly accuracy of the parts.

[0035] A first support frame 4 and a second support frame 5 are arranged and installed at the bottom of the rear end cover 2. A third support frame 6 is installed at the bottom of the front end cover 3. The second support frame 5 is installed between the first support frame 4 and the third support frame 6. A base 7 is fixedly installed at the bottom of the first support frame 4 and the second support frame 5. The bottom of the third support frame 6 is slidably installed on the surface of the base 7. A guide rod 8 is provided on the surface of the third support frame 6 near the second support frame 5. The surface of the guide rod 8 moves through the first support frame 4 and the second support frame 5. A threaded groove is provided at the end of the guide rod 8. A positioning nut is installed on the surface of the threaded groove. The first support frame 4 and the second support frame 5 are fixed together. The base 7 provides stable support for the rear cover 2. The third support frame 6 is connected to the front cover 3, and its bottom can slide along the surface of the base 7 to realize the position adjustment of the front cover 3. The guide rod 8 on the third support frame 6 moves through the first support frame 4 and the second support frame 5 to form an axial guide structure, which restricts the sliding direction of the third support frame 6 and avoids deviation. When adjusted to the required position, the guide rod 8 can be locked on the first support frame 4 or the second support frame 5 by tightening the positioning nut through the cooperation of the threaded groove at the end of the guide rod 8 and the positioning nut, thereby fixing the position of the third support frame 6 and finally realizing the stable locking of the relative position of the front cover 3 and the rear cover 2.

[0036] A locking disc 25 is fixedly mounted on the surface of the output shaft 10. Two protrusions 26 are symmetrically mounted on the surface of the locking disc 25. A turntable is rotatably mounted in the inner cavity of the second inner cavity 27. The surface of the turntable has a locking groove 28. Two grooves 29 are symmetrically opened on the inner wall of the locking groove 28. The two grooves 29 respectively cooperate with the two protrusions 26. The locking disc 25 on the surface of the output shaft 10 rotates synchronously with the shaft. The two symmetrically distributed protrusions 26 and the two grooves 29 on the inner wall of the locking groove 28 of the turntable in the second inner cavity 27 form a matching fit. After the front end cover 3 is connected to the rear end cover 2, the locking disc 25 is locked in the locking groove 28. At the same time, the protrusions 26 are locked into the corresponding grooves 29, forming a circumferential constraint. When the output shaft 10 rotates, the locking disc 25 transmits torque to the turntable through the rigid contact between the protrusions 26 and the grooves 29, driving the turntable to rotate synchronously, further ensuring the stability of the shaft core of the output shaft 10.

[0037] A sealing ring is provided at the connection between the rear cover 2 and the front cover 3. The sealing ring is usually made of elastic material. During assembly, it is squeezed by the connection surface of the rear cover 2 and the front cover 3, and undergoes elastic deformation to fill the gap between the two covers, forming a physical barrier to prevent the internal medium from leaking out, while preventing external impurities from entering.

[0038] Working principle: First, the rear cover 2 and the front cover 3 are brought closer together. The guide post of the front cover 3 slides along the inner wall of the sleeve of the rear cover 2. At the same time, the first support frame 4 and the second support frame 5 at the bottom of the rear cover 2 are fixed on the base 7, and the third support frame 6 of the front cover 3 slides along the surface of the base 7. The directional adjustment is achieved by the guide rod 8 passing through the first support frame 4 and the second support frame 5. Then, as the rear cover 2 and the front cover 3 gradually approach each other, the insertion strip 31 in the insertion groove 30 of the front cover 3 gradually inserts into the first movable groove 13 of the protruding plate 12 of the rear cover 2. The inclined edge 32 of the insertion strip 31 and the two pressing blocks in the first movable groove 13... Upon contact with the 15th contact point, as the insertion depth increases, the squeezing force of the inclined edge 32 pushes the squeezing block 15 to move to both sides. The squeezing block 15 drives the connecting rod 16 and the L-shaped rod 17 in linkage. The L-shaped rod 17 overcomes the tension of the tension spring and moves away from the center of the protruding plate, thereby pushing the swing arm 18 to rotate in the opposite direction around the pivot in the positioning frame 19. The top of the swing arm 18 shifts outward in the second movable groove 14, and the bottom swings towards the output shaft 10. Finally, it drives the fixing plate 21, fixing strip 22, bracket 23 and positioning cylinder 24 to move closer to and clamp the output shaft 10, completing the auxiliary positioning of the shaft core of the output shaft 10. At the same time, the output shaft 10 The locking disc 25 on the surface is embedded in the locking groove 28 of the turntable in the second inner cavity 27 of the front end cover 3. The protrusion 26 of the locking disc 25 and the groove 29 of the locking groove 28 are precisely engaged to form a circumferential constraint, further positioning the output shaft 10. Thus, if the output shaft 10 has a radial offset tendency due to load fluctuations, vibrations, etc. during rotation, the positioning cylinder 24 will be restricted by the auxiliary positioning of the bracket 23, the fixing strip 22, the fixing plate 21 and the positioning cylinder 24, and the rigid positioning of the locking groove 28, the groove 29 and the locking disc 25, the protrusion 26, preventing the output shaft 10 from radially offset. Then, it is locked by the positioning nut, so that the rear end... Cover 2 is fixed to front cover 3. After rear cover 2 is attached to front cover 3, the sealing ring at the connection is squeezed and deformed, filling the gap to form a seal, preventing internal medium from leaking out and external impurities from entering. When rear cover 2 and front cover 3 are opened, front cover 3 gradually moves forward, insert strip 31 exits the first movable groove 13, the squeezing force of squeezing block 15 disappears, the tension spring resets and pulls L-shaped rod 17 to move to the middle of protruding plate 12, driving swing arm 18 to rotate in the opposite direction, positioning cylinder 24 releases output shaft 10, locking plate 25 separates from locking groove 28. At this time, the staff can observe and maintain the gear set inside output shaft 10 and gear motor 1.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A geared motor with a shaft core positioning structure, comprising a geared motor (1), characterized in that, The geared motor (1) includes a rear end cover (2) and a front end cover (3). The rear end cover (2) and the front end cover (3) cooperate with each other. The rear end cover (2) has a first inner cavity (9) inside, and the front end cover (3) has a second inner cavity (27) inside. An output shaft (10) is rotatably installed inside the first inner cavity (9). The surface of the output shaft (10) moves through the front end cover (3). A protruding plate (12) is fixedly provided on the top of the rear end cover (2) near the surface of the front end cover (3). A positioning mechanism (11) is provided below the protruding plate (12). A positioning mechanism (11) is provided on the top of the front end cover (3) near the surface of the rear end cover (2). The positioning mechanism (11) includes two fixing plates (21), which are respectively installed on both sides of the output shaft (10). Fixing strips (22) are fixedly installed on both sides of the fixing plates (21). Brackets (23) are installed on the upper and lower ends of the fixing strips (22). A positioning cylinder (24) is rotatably installed between the two opposing brackets (23). The protruding plate (12) has a second movable groove (14) on both sides inside. A swing arm (18) is fixedly installed on the top of the fixed plate (21) away from the output shaft (10). Positioning frames (19) are fixedly installed at both ends of the bottom of the protruding plate (12). The surface of the swing arm (18) near its top is mounted in the positioning frame (19) via a pivot, and the top of the swing arm (18) is movably inserted into the second movable slot (14); a first movable slot (13) is provided in the middle of the protruding plate (12), the first movable slot (13) is located between the two second movable slots (14), and a connecting slot (20) is provided on the surface of the swing arm (18) inside the second movable slot (14). An L-shaped rod (17) is mounted on the surface of the connecting slot (20) via a pivot, and a connecting rod (16) is fixedly connected to the other end of the L-shaped rod (17). The surface of the connecting rod (16) penetrates the... The second movable groove (14) has the other end of the connecting rod (16) installed in the first movable groove (13). The end face of the connecting rod (16) installed inside the first movable groove (13) is fixedly installed with a pressing block (15). A tension spring is connected between the L-shaped rod (17) and the inner wall of the second movable groove (14). A plug strip (31) is fixedly installed inside the plug groove (30). The surface of the plug strip (31) is movably inserted into the first movable groove (13). The end of the plug strip (31) corresponds to the two pressing blocks (15). The end face of the plug strip (31) near the rear end cover (2) is provided with an inclined edge (32).

2. A geared motor with a shaft core positioning structure according to claim 1, characterized in that, A sleeve is provided on the outer surface of the rear cover (2) near the front cover (3), and a guide post is provided on the surface of the front cover (3) near the rear cover (2). The surface of the guide post is movably inserted into the sleeve.

3. A geared motor with a shaft core positioning structure according to claim 1, characterized in that, The bottom of the rear cover (2) is provided with a first support frame (4) and a second support frame (5). The bottom of the front cover (3) is provided with a third support frame (6). The second support frame (5) is installed between the first support frame (4) and the third support frame (6). The bottom of the first support frame (4) and the second support frame (5) is fixedly installed with a base (7). The bottom of the third support frame (6) is slidably installed on the surface of the base (7). The surface of the third support frame (6) near the second support frame (5) is provided with a guide rod (8). The surface of the guide rod (8) moves through the first support frame (4) and the second support frame (5). The end of the guide rod (8) is provided with a threaded groove. The surface of the threaded groove is fitted with a positioning nut.

4. A geared motor with a shaft core positioning structure according to claim 1, characterized in that, A locking plate (25) is fixedly installed on the surface of the output shaft (10). Two protrusions (26) are symmetrically installed on the surface of the locking plate (25). A turntable is rotatably installed in the inner cavity of the second inner cavity (27). A locking groove (28) is opened on the surface of the turntable. Two grooves (29) are symmetrically opened on the inner wall of the locking groove (28). The two grooves (29) respectively cooperate with the two protrusions (26).

5. A geared motor with a shaft core positioning structure according to claim 1, characterized in that, A sealing ring is provided at the connection between the rear end cover (2) and the front end cover (3).

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