Cylindrical turning device for machining motor top cover

Abstract

The invention discloses an outer circle turning device for motor top cover machining, and belongs to the technical field of motor top cover machining, the outer circle turning device for motor top cover machining comprises a fixing plate and a turning tool, a rotating mechanism is installed on one side of the fixing plate, an adjusting mechanism is installed on one side of the rotating mechanism, the adjusting mechanism comprises a connecting disc, and the connecting disc is connected with the turning tool. A fan-shaped connecting plate is rotationally arranged on the side, close to the rotating mechanism, of the connecting disc, three fixing columns are slidably arranged in the fan-shaped connecting plate, trapezoidal blocks are fixed to the sides, away from the rotating mechanism, of the three fixing columns, and rotating shafts are rotationally connected into the three trapezoidal blocks. By designing the rotating mechanism and the adjusting mechanism, a plurality of motor top covers can be turned at the same time when the cylindrical turning device is used, in the turning process of the motor top covers, cutting force can be coped with in time, motor end cover deformation caused by too large cutting force is avoided, and then the cylindrical turning quality of the motor top covers is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor top cover processing, and particularly relates to an outer circle turning device for motor top cover processing. Background Art

[0002] The outer circle processing of the motor top cover is a very important part in the motor manufacturing process, usually used to ensure the smoothness of the outer surface, dimensional accuracy and shape accuracy of the top cover. As an external protection component of the motor, the top cover not only needs to have good sealing performance, but also needs to withstand a certain mechanical load. Therefore, the accuracy and surface quality of its outer circle processing directly affect the performance and service life of the motor. Through scientific and reasonable processing technology and equipment selection, it can be ensured that the dimensional accuracy and surface quality of the motor top cover after outer circle processing meet the design requirements, thereby improving the overall performance and reliability of the motor.

[0003] The outer circle of the motor top cover not only has a protective function but also needs to maintain a certain aesthetic appearance. Therefore, before assembly, it needs to be turned. When the existing outer circle turning device for motor top cover processing is in use, usually only one outer circle is processed, resulting in slow processing speed and low efficiency. In addition, during the traditional outer circle turning process, due to the action of the cutting force, the workpiece is prone to elastic deformation, resulting in dimensional deviation, roundness error or surface vibration marks of the processed outer circle, thus reducing the production quality of the motor outer circle. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide an outer circle turning device for motor top cover processing.

[0005] The technical solution adopted to solve the above technical problem is: an outer circle turning device for motor top cover processing, including a fixed plate and a turning tool. A rotating mechanism is installed on one side of the fixed plate, and an adjusting mechanism is installed on one side of the rotating mechanism to reduce the hard collision between the motor top cover and the turning tool during turning. The adjusting mechanism includes a connecting plate. A sector connecting plate rotates on the side of the connecting plate close to the rotating mechanism, and three fixing columns slide inside the sector connecting plate. One side of the three fixing columns away from the rotating mechanism is fixed with a trapezoidal block, and a rotating shaft is rotatably connected inside each of the three trapezoidal blocks. Springs slide on the outer walls of the three rotating shafts. By rotating the trapezoidal block, the trapezoidal block on the corresponding fixing column slides, thereby squeezing the corresponding spring to adapt to the distance between the motor top cover and the side of the turning tool.

[0006] A main body is fixed on the side of the fixed plate away from the rotating mechanism, and an operating table for processing is opened on the top of the main body. A moving table for driving the turning tool to move is installed on the side of the top of the main body opposite to the fixed plate.

[0007] Further, a rotating mechanism for driving the rotation and turning of the motor end cover is installed inside the main body. The rotating mechanism includes a sleeve. A support plate for supporting and dispersing is fixed on one side of the sleeve away from the main body. On the sides of the three branches of the support plate away from the main body, second gears are installed, and a first gear meshes with the centers of the three second gears. By rotating the first gear, the three second gears are driven, and then the corresponding motor top covers are driven to rotate. On one side of the first gear close to the support plate, a first drive shaft passing through the sleeve is fixed. On the side of the first drive shaft away from the first gear, a first motor is fixed. The first gear on the first drive shaft is rotated by the first motor.

[0008] Through the above technical solution, during use, when the motor top cover is placed in position, the rotating mechanism can be used to drive the device to rotate at this time, and then drive the motor top cover to rotate. Subsequently, the turning tool is aligned using the moving platform on the main body to determine the turning position. Then, the motor top cover can be machined by the turning tool. Specifically, the first motor is started to drive the first gear on the first drive shaft to rotate, and then the three second gears are driven to rotate. Then, the components connected to the second gears all rotate, ensuring the progress of the turning process.

[0009] Further, the rotating mechanism includes a third gear. A turntable is rotatably connected to the surface of the fixing plate. A plurality of ratchets are fixedly connected to the outer wall of the turntable. By rotating the third gear, the turntable surrounded by the plurality of ratchets is driven, and then a plurality of motor top covers are driven to rotate and be exchanged for turning. On one side of the third gear close to the fixing plate, a second drive shaft is fixed, and on the other end of the second drive shaft, a second motor located inside the main body is fixed. The third gear on the second drive shaft is rotated by the second motor. One side of the sleeve close to the fixing plate is fixed to the turntable.

[0010] Through the above technical solution, when machining a plurality of motor top covers, when the turning of one motor top cover is completed, the rotating mechanism can be used for conversion at this time to ensure that each motor top cover can be machined, thereby improving the turning speed of the turning device. Specifically, the second motor is started to drive the third gear on the second drive shaft to rotate. Under the engagement of the plurality of ratchets and the third gear, the turntable will be driven to rotate at this time. Also, since one end of the sleeve is fixed to the turntable and the other end is fixed to the support plate, during the rotation of the turntable, the components connected to it will be driven to rotate together, thus completing the conversion of the motor top cover.

[0011] Further, two concave limiting plates with rotational offsets are fixed to one side of the three rotating shafts away from the trapezoidal block, and a convex limiting plate slides between the corresponding two concave limiting plates. One of the corresponding concave limiting plates is fixedly connected to the corresponding second gear on the side away from the rotating shaft. When the rotating shaft moves, it will drive the concave limiting plate and the convex limiting plate to shift, and ensure rotation while shifting. The surface of the connecting disk is provided with trapezoidal grooves for the corresponding trapezoidal blocks to slide, and the three trapezoidal grooves are internally provided with sliding grooves for the corresponding rotating shafts to slide. The fan-shaped surface of the fan-shaped connecting plate is provided with inclined grooves for the corresponding fixed columns to slide. A first hydraulic cylinder is installed between one of the fan-shaped plates of the fan-shaped connecting plate and the connecting disk. By pushing the fan-shaped connecting plate to rotate through the first hydraulic cylinder, the fixed column slides on the inclined groove, and then drives the trapezoidal block on the fixed column to slide in and out along the trapezoidal groove, so that the rotating shaft slides.

[0012] Through the above technical solutions, during the processing of multiple motor top covers, first, it is necessary to select according to the specifications of the motor top cover to determine the size of the electric top cover, and then determine the distance between the outer circle of the motor top cover and the turning tool to ensure the normal progress of turning processing. At the same time, during the turning process, when the turning force is too large, it can be automatically adjusted to avoid deformation of the motor top cover caused by excessive turning force, thereby improving the turning quality of the motor top cover. Specifically, start the first hydraulic cylinder, and its piston end will drive the fan-shaped connecting plate to rotate, so that the fixed column slides along the inclined groove. Then, the fixed column will slide in and out on the inclined groove. At the same time, the trapezoidal block will slide on the trapezoidal groove, and then drive the rotating shaft to slide on the sliding groove, and will pull or compress the spring. At this time, determine the size of the motor top cover. It should be noted that when the rotating shaft moves, ensure that the rotating shaft keeps rotating, and then drive the two concave limiting plates and the convex limiting plate to produce adaptive sliding. Under the action of the convex strip, it will not fall off while keeping rotating. Then, under the rotation of the second gear, ensure rotation while shifting. In addition, when the turning force is too large, at this time, the turning tool will squeeze the outer circle of the motor top cover, and then pull and compress the spring, thereby effectively avoiding the hard collision between the motor top cover and the turning tool. It should be noted that when there is already a pressure difference in the hydraulic system of the first hydraulic cylinder, the hydraulic rod naturally expands and contracts under the action of external conditions, rather than being actively controlled by the system.

[0013] Furthermore, a lining mechanism for supporting the inner wall of the motor top cover is installed at the ends of the three rotating shafts away from the corresponding springs. The lining mechanism includes a plurality of first connecting rods and second connecting rods. The other ends of the plurality of first connecting rods and second connecting rods are rotatably connected with lining plates. By moving and supporting the corresponding first connecting rods through the movement of the plurality of second connecting rods, the corresponding lining plates are driven to support the inner walls of motor top covers of different specifications. Cylindrical sleeves are fixed on one side of the three rotating shafts away from the corresponding springs. Second hydraulic cylinders are installed inside the three cylindrical sleeves, and connecting sleeves are installed at the piston ends of the three second hydraulic cylinders. By expanding and contracting the connecting sleeves at the piston ends of the three second hydraulic cylinders, the corresponding second connecting rods are driven to move. The other ends of the plurality of first connecting rods are rotatably connected to the outer walls of the corresponding cylindrical sleeves.

[0014] Through the above technical solution, when the turning process of the outer ring of the motor top cover starts, the lining mechanism is used to support the inner wall of the motor top cover at this time to ensure the stability of the motor top cover during the turning process. Specifically, start the three second hydraulic cylinders, and their piston ends drive the second connecting rods on the corresponding connecting sleeves to move and support respectively, and then drive the plurality of first connecting rods on the corresponding lining plates to maintain support with the cylindrical sleeves. Furthermore, the plurality of lining plates will support the inside of the motor top cover to adapt to the sizes of different motor top covers.

[0015] The beneficial effects of the present invention are as follows: (1) By designing the rotating mechanism, the revolving mechanism, the adjusting mechanism and the lining mechanism, the present invention can simultaneously machine multiple motor top covers when the external turning device is in use, and during the turning process of the motor top cover, it can timely respond to the cutting force to avoid the deformation of the motor end cover caused by excessive cutting force, thereby improving the machining quality of the outer circle turning of the motor top cover; (2) By designing the rotating mechanism, the revolving mechanism and the lining mechanism, when turning the motor top cover, the present invention can quickly support multiple motor top covers and then perform rotary turning. In addition, on the premise of ensuring the turning quality, the motor top covers can be rotated and replaced one by one to improve the turning speed; (3) By designing the adjusting mechanism, by adjusting the position of the motor top cover, the distance between the motor top cover and the cutting tool can be determined according to the size of the motor top cover during the turning process to ensure the turning thickness. And when the turning force of the device is too large, the hard confrontation is reduced and the damage is reduced, thereby improving the machining quality. Description of the Drawings

[0016] Figure 1 is the structural schematic diagram of the first perspective of the present invention; Figure 2 is the structural schematic diagram of the second perspective of the present invention; Figure 3 is the front view of the present invention; Figure 4 is the sectional view of the present invention; Figure 5 is Figure 4 The partial enlarged view at position A in Figure 6 is the schematic structural view of the rotation mechanism and the adjustment mechanism of the present invention; Figure 7 is the schematic structural view of the rotation mechanism and the adjustment mechanism of the present invention; Figure 8 is the schematic structural view of the adjustment mechanism and the inner lining mechanism of the present invention from the first perspective; Figure 9 is the schematic structural view of the adjustment mechanism and the inner lining mechanism of the present invention from the second perspective; Figure 10 is Figure 9 the partial enlarged view at position B in

[0017] Reference numerals: 11, main body; 12, operation table; 13, moving table; 14, turning tool; 15, fixing plate; 2, rotation mechanism; 21, first motor; 22, first drive shaft; 23, first gear; 24, support plate; 25, second gear; 26, sleeve; 3, rotation mechanism; 31, second motor; 32, second drive shaft; 33, third gear; 34, turntable; 35, ratchet teeth; 4, adjustment mechanism; 41, connecting plate; 42, first hydraulic cylinder; 43, sector connecting plate; 44, inclined groove; 45, sliding groove; 46, fixed column; 47, trapezoidal groove; 48, trapezoidal block; 49, concave limiting plate; 410, convex limiting plate; 411, rotating shaft; 412, spring; 5, inner lining mechanism; 51, cylindrical sleeve; 52, second hydraulic cylinder; 53, first connecting rod; 54, second connecting rod; 55, connecting sleeve; 56, inner lining plate. Detailed implementation manners

[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] As Figures 1 - 10As shown in the figure, an external turning device for machining the motor top cover of this embodiment includes a fixing plate 15 and a turning tool 14. A main body 11 is fixed on one side of the fixing plate 15 away from the rotating mechanism 3, and an operating table 12 for machining is provided at the top of the main body 11. A moving table 13 for driving the turning tool 14 to move is installed on the side of the top of the main body 11 opposite to the fixing plate 15. A rotating mechanism 2 for driving the motor end cover to rotate and turn is installed inside the main body 11. The rotating mechanism 2 includes a sleeve 26. A support plate 24 for supporting and dispersing is fixed on one side of the sleeve 26 away from the main body 11. Second gears 25 are installed on the sides of the three branches of the support plate 24 away from the main body 11, and a first gear 23 meshes with the centers of the three second gears 25. By rotating the first gear 23, the three second gears 25 are driven, and then the corresponding motor top covers are driven to rotate. A first drive shaft 22 passing through the sleeve 26 is fixed on the side of the first gear 23 close to the support plate 24. A first motor 21 is fixed on the side of the first drive shaft 22 away from the first gear 23. The first gear 23 on the first drive shaft 22 is rotated by the first motor 21. When in use, after the motor top cover is placed, the rotating mechanism 2 can be used to drive the device to rotate, and then drive the motor top cover to rotate. Subsequently, the turning tool 14 is aligned by the moving table 13 on the main body 11 to determine the turning position, and then the motor top cover can be turned and machined by the turning tool 14. Specifically, the first motor 21 is started to drive the first gear 23 on the first drive shaft 22 to rotate, and then drive the three second gears 25 to rotate. Subsequently, the components connected to the second gears 25 all rotate, ensuring the turning machining process.

[0020] As Figure 7As shown in the figure, a rotating mechanism 3 is installed on one side of the fixed plate 15. The rotating mechanism 3 includes a third gear 33. A turntable 34 is rotatably connected to the surface of the fixed plate 15. A plurality of ratchets 35 are fixedly connected to the outer wall of the turntable 34. By rotating the third gear 33, the turntable 34 surrounded by the plurality of ratchets 35 is driven, and then a plurality of motor top covers are driven to rotate and be adjusted for turning. A second drive shaft 32 is fixed on the side of the third gear 33 close to the fixed plate 15, and a second motor 31 located inside the main body 11 is fixed at the other end of the second drive shaft 32. The second motor 31 drives the third gear 33 on the second drive shaft 32 to rotate. One side of the sleeve 26 close to the fixed plate 15 is fixed to the turntable 34. When processing a plurality of motor top covers, when the turning of one motor top cover is completed, the rotating mechanism 3 can be used for conversion at this time to ensure that each motor top cover can be turned, thereby improving the turning speed of the turning device. Specifically, the second motor 31 is started to drive the third gear 33 on the second drive shaft 32 to rotate. Under the engagement of the plurality of ratchets 35 and the third gear 33, the turntable 34 will be driven to rotate at this time. Also, since one end of the sleeve 26 is fixed to the turntable 34 and the other end is fixed to the support plate 24, during the rotation of the turntable 34, the components connected to it will be driven to rotate together, thus completing the conversion of the motor top cover.

[0021] As Figures 7 - 8 and Figure 10As shown, an adjusting mechanism 4 is installed on one side of the rotating mechanism 3, which is used to reduce the hard collision between the motor top cover and the turning tool 14 during the turning process. The adjusting mechanism 4 includes a connecting plate 41. A sector connecting plate 43 is rotatably connected to the side of the connecting plate 41 close to the rotating mechanism 3. Three fixing columns 46 are slidably arranged inside the sector connecting plate 43. Trapezoidal blocks 48 are fixed to the sides of the three fixing columns 46 away from the rotating mechanism 3. Rotating shafts 411 are rotatably connected to the interiors of the three trapezoidal blocks 48. Springs 412 are slidably arranged on the outer walls of the three rotating shafts 411. By rotating the trapezoidal blocks 48, the corresponding trapezoidal blocks 48 on the fixing columns 46 slide, thereby squeezing the corresponding springs 412 to adapt to the distance between the motor top cover and the side of the turning tool 14. Two concave limiting plates 49 with rotational offsets are fixed to the sides of the three rotating shafts 411 away from the trapezoidal blocks 48. An outer convex limiting plate 410 is slidably arranged between the corresponding two concave limiting plates 49. One of the corresponding concave limiting plates 49 is fixedly connected to the corresponding second gear 25 away from the rotating shaft 411. When the rotating shaft 411 moves, it will drive the concave limiting plate 49 and the outer convex limiting plate 410 to shift, and ensure rotation while shifting. Trapezoidal grooves 47 for the corresponding trapezoidal blocks 48 to slide are formed on the surface of the connecting plate 41. Chute grooves 45 for the corresponding rotating shafts 411 to slide are formed inside the three trapezoidal grooves 47. Oblique grooves 44 for the corresponding fixing columns 46 to slide are formed on the fan-shaped surface of the sector connecting plate 43. A first hydraulic cylinder 42 is installed between one of the fan-shaped plates of the sector connecting plate 43 and the connecting plate 41. By pushing the sector connecting plate 43 to rotate through the first hydraulic cylinder 42, the fixing columns 46 slide on the oblique grooves 44, thereby driving the trapezoidal blocks 48 on the fixing columns 46 to slide in and out along the trapezoidal grooves 47, causing the rotating shafts 411 to slide. During the processing of multiple motor top covers, first, it is necessary to select according to the specifications of the motor top cover to determine the size of the motor top cover, and then determine the distance between the outer circle of the motor top cover and the turning tool 14 to ensure the normal progress of the turning process. At the same time, during the turning process, when the turning force is too large, automatic adjustment can be carried out to avoid deformation of the motor top cover caused by excessive turning force, thereby improving the turning quality of the motor top cover. Specifically, start the first hydraulic cylinder 42, and its piston end will drive the sector connecting plate 43 to rotate, causing the fixing columns 46 to slide along the oblique grooves 44. Then, the fixing columns 46 will slide in and out on the oblique grooves 44. At the same time, the trapezoidal blocks 48 will slide on the trapezoidal grooves 47, thereby driving the rotating shafts 411 to slide on the chute grooves 45 and pulling or compressing the springs 412. At this time, to determine the size of the motor top cover, it should be noted that when the rotating shaft 411 moves, ensure that the rotating shaft 411 keeps rotating, thereby driving the two concave limiting plates 49 and the outer convex limiting plate 410 to produce adaptive sliding. Under the action of the convex strips, it will not fall off while keeping rotating. Then, under the rotation of the second gear 25, ensure that it shifts and rotates at the same time. In addition, when the turning force is too large, at this time, the turning tool 14 will squeeze the outer circle of the motor top cover.Furthermore, it pulls the compression spring 412, effectively avoiding the hard collision between the motor top cover and the turning tool 14. It should be noted that when there is already a pressure difference in the hydraulic system of the first hydraulic cylinder 42, the hydraulic rod expands and contracts naturally under the action of external conditions, rather than being actively controlled by the system.

[0022] As Figures 9 - 10 shown, a lining mechanism 5 for supporting the inner wall of the motor top cover is installed at the ends of the three rotating shafts 411 away from the corresponding springs 412. The lining mechanism 5 includes a plurality of first connecting rods 53 and second connecting rods 54. The other ends of the plurality of first connecting rods 53 and second connecting rods 54 are rotatably connected with lining plates 56. By moving and supporting the corresponding first connecting rods 53 through the movement of the plurality of second connecting rods 54, the corresponding lining plates 56 are driven to support the inner walls of motor top covers of different specifications. Cylindrical sleeves 51 are fixed on one side of the three rotating shafts 411 away from the corresponding springs 412. Second hydraulic cylinders 52 are installed inside the three cylindrical sleeves 51, and connecting sleeves 55 are installed at the piston ends of the three second hydraulic cylinders 52. By the telescopic movement of the connecting sleeves 55 at the piston ends of the three second hydraulic cylinders 52, the corresponding second connecting rods 54 are driven to move. The other ends of the plurality of first connecting rods 53 are rotatably connected to the outer walls of the corresponding cylindrical sleeves 51. When the turning process of the outer ring of the motor top cover starts, the lining mechanism 5 is used to support the inner wall of the motor top cover to ensure the stability of the motor top cover during the turning process. Specifically, the three second hydraulic cylinders 52 are started, and their piston ends drive the second connecting rods 54 on the corresponding connecting sleeves 55 to move and support, thereby driving the plurality of first connecting rods 53 on the corresponding lining plates 56 to maintain support with the cylindrical sleeves 51. Then, the plurality of lining plates 56 will support the inside of the motor top cover to adapt to the sizes of different motor top covers.

[0023] The working principle of this embodiment is as follows. When in use, three motor top covers are sequentially placed into the turning device. The second hydraulic cylinders 52 are started in sequence, and their piston ends drive the second connecting rods 54 on the corresponding connecting sleeves 55 to move and support, thereby driving the multiple first connecting rods 53 on the corresponding inner lining plates 56 to maintain support with the cylindrical sleeves 51. Then, the multiple inner lining plates 56 will support the inside of the motor top cover. Subsequently, the first hydraulic cylinder 42 is started, and its piston end will drive the sector-shaped connecting plate 43 to rotate, causing the fixed column 46 to slide along the inclined groove 44. Thus, the fixed column 46 will perform an inward and outward sliding movement on the inclined groove 44. At the same time, the trapezoidal block 48 will slide on the trapezoidal groove 47, thereby driving the rotating shaft 411 to slide on the sliding groove 45 and pulling or compressing the spring 412, and then driving the two concave limiting plates 49 and the convex limiting plate 410 to perform an adaptive sliding. At this time, the size of the motor top cover is determined, and then the distance between the outer circle of the motor top cover and the turning tool 14 is determined. The first motor 21 is started to drive the first gear 23 on the first driving shaft 22 to rotate, and then drives the three second gears 25 to rotate. Thus, the components connected to the second gears 25 all maintain rotation, causing the two concave limiting plates 49 and the convex limiting plate 410 connected to the surface of the second gear 25 to rotate. At the same time, the rotating shaft 411 connected to the concave limiting plate 49 will drive the motor top cover on the corresponding inner lining plate 56 to rotate, realizing turning processing. When the turning force is too large, at this time, the turning tool 14 will squeeze the outer circle of the motor top cover, thereby pulling and compressing the spring 412. As the turning processing of one of the motor top covers is completed, at this time, the second motor 31 is started to drive the third gear 33 on the second driving shaft 32 to rotate. Under the engagement of the multiple ratchets 35 and the third gear 33, the turntable 34 will be driven to rotate at this time. And because one end of the sleeve 26 is fixed to the turntable 34, the conversion of the motor top cover is completed.

[0024] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. An external turning device for machining the top cover of a motor, comprising a fixing plate (15) and a turning tool (14), characterized in that: A rotating mechanism (3) is installed on one side of the fixed plate (15), and an adjusting mechanism (4) is installed on one side of the rotating mechanism (3) to reduce the hard collision between the motor top cover and the turning tool (14) during turning. The adjusting mechanism (4) includes a connecting disk (41). A sector connecting plate (43) rotates on the side of the connecting disk (41) close to the rotating mechanism (3). Three fixing columns (46) slide inside the sector connecting plate (43). Trapezoidal blocks (48) are fixed on the sides of the three fixing columns (46) away from the rotating mechanism (3). Rotating shafts (411) are rotatably connected inside the three trapezoidal blocks (48). Springs (412) slide on the outer walls of the three rotating shafts (411). By rotating the trapezoidal blocks (48), the trapezoidal blocks (48) on the corresponding fixing columns (46) slide, thereby squeezing the corresponding springs (412) to adapt to the side distance between the motor top cover and the turning tool (14).

2. The external turning device for machining the motor top cover according to claim 1, characterized in that, A main body (11) is fixed on the side of the fixed plate (15) away from the rotating mechanism (3). An operating table (12) for processing is provided at the top of the main body (11). A moving table (13) for driving the turning tool (14) to move is installed on the side of the top of the main body (11) opposite to the fixed plate (15).

3. The external turning device for machining the motor top cover according to claim 2, characterized in that, A rotating mechanism (2) for driving the motor end cover to rotate and turn is installed inside the main body (11). The rotating mechanism (2) includes a sleeve (26). A supporting plate (24) for supporting and dispersing is fixed on the side of the sleeve (26) away from the main body (11). Second gears (25) are installed on the sides of the three branches of the supporting plate (24) away from the main body (11). A first gear (23) meshes with the central ends of the three second gears (25). By rotating the first gear (23), the three second gears (25) are driven, thereby driving the corresponding motor top cover to rotate.

4. The external turning device for machining the motor top cover according to claim 3, characterized in that, A first driving shaft (22) penetrating through the sleeve (26) is fixed on the side of the first gear (23) close to the supporting plate (24). A first motor (21) is fixed on the side of the first driving shaft (22) away from the first gear (23). The first motor (21) drives the first gear (23) on the first driving shaft (22) to rotate.

5. The external turning device for machining the motor top cover according to claim 3, characterized in that, The rotating mechanism (3) includes a third gear (33). A turntable (34) is rotatably connected to the surface of the fixed plate (15). A plurality of teeth (35) are fixedly connected to the outer wall of the turntable (34). By rotating the third gear (33), the turntable (34) surrounded by the plurality of teeth (35) is driven, thereby driving the plurality of motor top covers to rotate and be exchanged for turning.

6. The external turning device for machining the motor top cover according to claim 5, characterized in that, A second driving shaft (32) is fixed on the side of the third gear (33) close to the fixed plate (15). The other end of the second driving shaft (32) is fixed with a second motor (31) located inside the main body (11). The second motor (31) drives the third gear (33) on the second driving shaft (32) to rotate. The side of the sleeve (26) close to the fixed plate (15) is fixed to the turntable (34).

7. The external turning device for machining the motor top cover according to claim 3, characterized in that, On one side of the three rotating shafts (411) away from the trapezoidal block (48), two concave limiting plates (49) with rotational offsets are fixed, and a convex limiting plate (410) slides between the corresponding two concave limiting plates (49). One of the corresponding concave limiting plates (49) is fixedly connected to the corresponding second gear (25) on the side away from the rotating shaft (411). When the rotating shaft (411) moves, it will drive the concave limiting plate (49) and the convex limiting plate (410) to shift, and thus ensure rotation while shifting.

8. The external turning device for machining the motor top cover according to claim 7, characterized in that, The surface of the connecting disk (41) is provided with trapezoidal grooves (47) for the corresponding trapezoidal blocks (48) to slide, and the inside of the three trapezoidal grooves (47) are all provided with sliding grooves (45) for the corresponding rotating shafts (411) to slide. The fan-shaped connecting plate (43) is provided with inclined grooves (44) for the corresponding fixed columns (46) to slide on the fan plate surface. A first hydraulic cylinder (42) is installed between one of the fan plates of the fan-shaped connecting plate (43) and the connecting disk (41). By pushing the fan-shaped connecting plate (43) to rotate through the first hydraulic cylinder (42), it drives the fixed column (46) to slide on the inclined groove (44), and then drives the trapezoidal block (48) on the fixed column (46) to slide in and out along the trapezoidal groove (47), so that the rotating shaft (411) slides.

9. The external turning device for machining the motor top cover according to claim 1, characterized in that, On one side of the three rotating shafts (411) away from the corresponding springs (412), a lining mechanism (5) for supporting the inner wall of the motor top cover is installed. The lining mechanism (5) includes a plurality of first connecting rods (53) and second connecting rods (54). The other ends of the plurality of first connecting rods (53) and second connecting rods (54) are all rotated with lining plates (56). By moving and supporting the corresponding first connecting rods (53) through the movement of the plurality of second connecting rods (54), the corresponding lining plates (56) are driven to support the inner walls of motor top covers of different specifications.

10. The external turning device for machining the motor top cover according to claim 9, characterized in that, On one side of the three rotating shafts (411) away from the corresponding springs (412), cylindrical sleeves (51) are fixed. Inside the three cylindrical sleeves (51), second hydraulic cylinders (52) are installed, and the piston ends of the three second hydraulic cylinders (52) are all installed with connecting sleeves (55). By the expansion and contraction of the connecting sleeves (55) at the piston ends of the three second hydraulic cylinders (52), the corresponding second connecting rods (54) are driven to move. The other ends of the plurality of first connecting rods (53) are all rotatably connected to the outer walls of the corresponding cylindrical sleeves (51).

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