Positioning tool for external rotor cylindrical grinding machine

Abstract

The utility model discloses a positioning tool for an external rotor cylindrical grinding machine, which comprises a positioning column, the positioning column is coaxially and fixedly connected with a left chuck of which the outer circumferential surface is uniformly provided with a plurality of left clamping block parts, and the positioning column is coaxially and rotatably connected with a right chuck of which the outer circumferential surface is uniformly provided with a plurality of right clamping block parts; a first locking assembly is detachably connected between the left chuck and the right chuck. The left clamping block part and the right clamping block part are both located in the inner tooth groove of the outer rotor and abut against the two opposite sides of the inner convex tooth end face of the outer rotor respectively. A clamping channel is formed between the left clamping block part and the right clamping block part, wherein the clamping channel is used for clamping outer rotor inner convex teeth of different sizes and is gradually expanded outwards in the radial direction in the direction away from the positioning column. One end of the positioning column is fixedly connected with a fixing disc, the other end of the positioning column is sleeved with a pressing disc in a sliding mode, the other end of the positioning column is detachably connected with a second locking assembly, and the left chuck and the right chuck are located between the fixing disc and the pressing disc, are suitable for outer rotors with different inner hole diameters and have the advantages of being convenient to position and fix, high in universality and low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of outer rotor cylindrical grinding, and more specifically relates to a positioning tool for an outer rotor cylindrical grinding machine. Background Art

[0002] At present, after the outer rotor is processed by powder metallurgy, it is necessary to grind the outer cylindrical surface of the outer rotor to ensure the accuracy of the outer cylindrical surface of the outer rotor. Usually, an outer cylindrical grinder is used to position and clamp the outer rotor between the two centers of the grinder or between the center and the three-jaw chuck, and then grind the outer cylindrical surface of the outer rotor. As shown in Figure 1 (a)-(b), when the existing outer cylindrical grinder positions the outer rotor 1 whose end face a of the inner convex tooth is a curved surface (that is, the inner hole is a curved surface), the inner hole positioning method is generally adopted. The outer rotor 1 is first clamped on the outer peripheral surface of the center positioning shaft 2, and then two end plates 3 are used to pass through the outer cylindrical surface of the outer rotor. The outer rotor 1 is locked on the center positioning shaft 2 by bolts. However, since the size of the existing center positioning shaft 2 is fixed, during the positioning process, due to the processing size deviation, it is difficult to clamp part of the outer rotor 1, and it is not possible to position according to outer rotors with different inner diameters, resulting in the user needing to replace a positioning shaft of a different size every time an outer rotor with a different inner diameter is processed, resulting in problems such as difficulty in positioning and fixing, poor versatility and high processing cost; in addition, long-term use will cause wear of the center positioning shaft 2, resulting in the need to regularly replace the center positioning shaft 2, increasing the overall processing cost. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a positioning tool for an external rotor cylindrical grinder, which is easy to position and fix, suitable for external rotors with different inner hole diameters, and has the advantages of easy positioning and fixation, high versatility and low cost.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A positioning tool for an outer rotor cylindrical grinder, comprising a positioning column, the positioning column is coaxially fixedly connected to a left chuck, a plurality of left clamping blocks are evenly arranged on the outer circumferential surface of the left chuck, the positioning column is coaxially rotatably connected to a right chuck, a plurality of right clamping blocks are evenly arranged on the outer circumferential surface of the right chuck, a first locking assembly for locking the right chuck is detachably connected between the left chuck and the right chuck; the left clamping block and the right clamping block are both located in the inner tooth groove of the outer rotor, and respectively abut against the inner convex tooth end of the outer rotor. The left and right clamping blocks are provided on opposite sides of the surface; a clamping channel is formed between the left clamping block portion and the right clamping block portion for clamping and placing the inner convex tooth end faces of the outer rotors with different inner hole sizes, and the clamping channel is radially expanded outward in the direction away from the positioning column, and one end of the positioning column is fixedly connected to a fixed disk, and the other end of the positioning column is provided with a sliding sleeve with a pressure plate for pressing the outer rotor onto the fixed disk, and the other end of the positioning column is detachably connected to a second locking assembly for locking the pressure plate, and the left clamping plate and the right clamping plate are located between the fixed disk and the pressure plate.

[0006] Further arrangement: the first locking assembly includes a plurality of first locking nuts and a plurality of adjusting bolts, one end of the adjusting bolt is fixedly connected to one end face of the left chuck, the other end face of the left chuck is fixedly connected to one end face of the fixed plate, one end face of the left chuck and one end face of the right chuck fit each other, and the right chuck is evenly provided with rotation holes and rotation grooves; the adjusting bolt passes through the rotation hole and is threadedly connected to the first locking nut, the first locking nut abuts against the other end face of the right clamp, and the pressure plate is provided with a makeshift groove for placing the adjusting bolt.

[0007] Further arrangement: the first locking assembly includes a plurality of first locking nuts and a plurality of adjusting bolts, one end of the adjusting bolt is fixedly connected to an end face of the right chuck, one end face of the left chuck and an end face of the right chuck fit together, the left chuck is located between the pressure plate and the right chuck, and the left chuck is evenly provided with a plurality of rotating holes; the other end of the adjusting bolt passes through the rotating hole and is threadedly connected to the first locking nut, the first locking nut abuts against the other end face of the left chuck, and the pressure plate is provided with a makeshift groove for placing the adjusting bolt.

[0008] It is further configured that the right chuck and the right clamping block are integrally formed, and the left chuck and the left clamping block are also integrally formed.

[0009] Further configuration: the right chuck comprises a right inner ring, a right outer ring and a first bolt, the inner side of the right inner ring is rotatably connected to the positioning column, the right clamping block portion is arranged on the outer side surface of the right outer ring, a first nut is provided at one end of the first bolt, a first threaded hole for connection with the first bolt is opened between the right inner ring and the right outer ring, a first countersunk groove for placement of the first nut is opened on the outer side surface of the right outer ring, and the first countersunk groove is located between adjacent right clamping block portions; the left chuck comprises a left inner ring, a left outer ring and a second bolt, the inner side of the left inner ring is fixedly connected to the positioning column, the left clamping block portion is arranged on the outer side surface of the left outer ring, a second nut is provided at one end of the second bolt, a second threaded hole for connection with the second bolt is opened between the left inner ring and the left outer ring, a second countersunk groove for placement of the second nut is opened on the outer side surface of the left outer ring, and the second countersunk groove is located between adjacent left clamping block portions.

[0010] Further configuration: the second locking assembly includes a second locking nut and a threaded column portion, the threaded column portion is integrally formed and arranged at the other end of the positioning column, and the pressure plate is provided with a through hole for the threaded column portion to pass through; the second locking nut is threadedly connected to the threaded column portion, and the second locking nut is against an end surface of the pressure plate away from the fixed plate.

[0011] It is further configured that the contact surface between the left clamping block part and the inner convex tooth end surface of the outer rotor is arranged in an arc shape, the contact surface between the right clamping block part and the inner convex tooth end surface of the outer rotor is arranged in an arc shape, and the left clamping block part and the right clamping block part are both provided with anti-slip pads.

[0012] It is further provided that: the pressure plate is detachably connected with a gasket ring for pressing one end of the outer rotor.

[0013] In summary, the utility model sleeves the outer rotor on the outer circumferential surface of the left chuck through the positioning column, the left chuck and the left clamping block part, and uses the left clamping block part to abut against one side of the end face of the inner convex teeth of the outer rotor to prevent the outer rotor from rotating in one direction around the central axis of the positioning column, thereby playing a role in preliminary positioning and supporting the inner convex teeth of the outer rotor; through the right chuck, the right clamping block part and the first locking assembly, the right chuck is rotated until the right clamping block part abuts against the other side of the end face of the inner convex teeth of the outer rotor, the right clamping block part and the left clamping block part clamp the inner convex teeth of the outer rotor, and the first locking assembly is used to lock the right chuck on the left chuck to prevent the outer rotor from rotating toward the other side of the end face of the inner convex teeth, thereby playing a role in clamping and supporting the end face of the inner convex teeth of the outer rotor; through the fixed plate, the pressure plate and the second locking assembly, the first The second locking assembly locks and presses the two ends of the outer rotor between the fixed plate and the pressure plate, thereby playing the role of limiting and clamping the end face of the outer rotor; by setting a clamping channel that gradually expands radially outward in the direction away from the positioning column, it can accommodate the end faces of the inner convex teeth of outer rotors with various diameters. When positioning and clamping outer rotors with different inner diameters, it is only necessary to ensure that the inner convex teeth of the outer rotor are all placed in the corresponding clamping channels, and then rotate the right clamping plate until all the right clamping blocks and the left clamping blocks clamp the end faces of the inner convex teeth of the outer rotor. The outer rotor does not rotate, thereby achieving the function of clamping and positioning the inner convex teeth of outer rotors with different inner hole sizes; the overall positioning and fixing are simple, suitable for outer rotors with different inner hole diameters, and have the advantages of easy positioning and fixing, high versatility and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1(a) and Figure 1(b) are schematic diagrams of the structure of the existing positioning tooling and the outer rotor;

[0015] Figure 2 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0016] Figure 3 This is a structural schematic diagram of the first locking assembly in the unlocked state in the first embodiment of the utility model;

[0017] Figure 4 This is a structural schematic diagram of the first locking assembly in the locked state in the first embodiment of the utility model;

[0018] Figure 5 It is a partial structural schematic diagram of the first embodiment of the utility model;

[0019] Figure 6 This is an exploded view of the first embodiment of the utility model;

[0020] Figure 7 This is an exploded view of the second embodiment of the utility model;

[0021] Figure 8 This is an exploded view of the third embodiment of the present utility model;

[0022] Fig. 9 This is a schematic structural diagram of the clamping state of outer rotors of different sizes in Embodiment 3 of the present utility model.

[0023] In the figure: 1. outer rotor; 2. center positioning shaft; 3. end plate; 4. positioning column; 5. left chuck; 6. left clamping block; 7. right chuck; 8. right clamping block; 9. clamping channel; 10. fixed plate; 11. pressure plate; 12. first locking nut; 13. adjusting bolt; 14. rotating hole; 15. rotating groove; 16. giving way groove; 17. right inner ring; 18. right outer ring; 19. first bolt; 20. first nut; 21. first threaded hole; 22. first countersunk groove; 23. left inner ring; 24. left outer ring; 25. second bolt; 26. second nut; 27. second threaded hole; 28. second countersunk groove; 29. ​​second locking nut; 30. threaded column; 31. through hole; 32. non-slip soft pad; 33. gasket; a. end face of inner convex tooth; b. inner tooth groove. DETAILED DESCRIPTION

[0024] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0025] The most critical concept of the utility model is: through the positioning column 4, the left chuck 5, the left clamping block part 6, the right chuck 7, the right clamping block part 8 and the first locking assembly, the outer rotor 1 is first sleeved on the outer peripheral surface of the left chuck 5 and the right chuck 7, and then the right chuck 7 is rotated until the right clamping block part 8 and the left clamping block part 6 clamp the end face a of the inner convex tooth of the outer rotor 1, and then the right chuck 7 is locked on the left chuck 5 by the first locking assembly to prevent the outer rotor 1 from rotating around the axis of the positioning column 4, so as to play the role of clamping and supporting the inner convex tooth end face of the outer rotor 1; through the fixed plate 10, the pressure plate 11 and the second locking assembly, the two end faces of the outer rotor 1 are pressed between the fixed plate 10 and the pressure plate 11 by the second locking assembly, so as to play the role of limiting and clamping the end face of the outer rotor 1;

[0026] When positioning the outer rotor 1 with different inner hole diameters, since the clamping channel 9 is radially expanded outward in the direction away from the positioning column 4, the clamping channel 9 can accommodate the end faces a of the inner convex teeth of the outer rotor 1 with various different diameters. The clamping method still only needs to ensure that the end faces a of the multiple inner convex teeth of the outer rotor 1 are all placed in the corresponding clamping channel 9. Initially, the left clamping block portion 6 and the right clamping block portion 8 are respectively located in the two inner tooth grooves b on both sides of the corresponding inner convex teeth, and then the right chuck 7 is rotated until all the right clamping block portions 8 and the left clamping block portion 6 clamp the end faces a of the inner convex teeth. The outer rotor 1 does not rotate, and the inner convex teeth of the outer rotor 1 with different inner hole sizes can be clamped and positioned.

[0027] The utility model is simple and convenient for overall positioning and fixing, is applicable to outer rotors 1 with various inner hole diameters, and has the advantages of convenient positioning and fixing, high versatility and low cost.

[0028] Please refer to Figures 2 to 9 As shown, a positioning fixture for an outer rotor cylindrical grinder includes a positioning column 4, which is coaxially fixedly connected to a left chuck 5, and a plurality of left clamping blocks 6 are evenly arranged on the outer circumference of the left chuck 5; the positioning column 4 is coaxially rotatably connected to a right chuck 7, and a plurality of right clamping blocks 8 are evenly arranged on the outer circumference of the right chuck 7; a first locking assembly for locking the right chuck 7 is detachably connected between the left chuck 5 and the right chuck 7; the left clamping block 6 and the right clamping block 8 are both located in the inner tooth groove b of the outer rotor 1, and respectively abut against the inner convex tooth end surface of the outer rotor 1 On opposite sides; a clamping channel 9 is formed between the left clamping block portion 6 and the right clamping block portion 8 for clamping and placing the inner convex tooth end faces of the outer rotor 1 with different inner hole sizes, and the clamping channel 9 is radially expanded outward in the direction away from the positioning column 4. A fixed disk 10 is fixedly connected to one end of the positioning column 4, and a pressure plate 11 for pressing the outer rotor 1 onto the fixed disk 10 is provided on the sliding sleeve at the other end of the positioning column 4. A second locking assembly for locking the pressure plate 11 is detachably connected to the other end of the positioning column 4, and the left chuck 5 and the right chuck 7 are located between the fixed disk 10 and the pressure plate 11.

[0029] From the above description, it can be known that the left chuck 5 is fixedly connected to the positioning column 4 through the positioning column 4, the left chuck 5 and the left blocking portion 6. When positioning the inner hole of the outer rotor 1, the outer rotor 1 is sleeved on the outer peripheral surface of the left chuck 5, and the left blocking portion 6 is used to abut against the end face a of the inner convex tooth of the outer rotor 1 to prevent the outer rotor 1 from rotating toward the end face a of the inner convex tooth around the center axis of the positioning column 4, thereby playing a role in preliminary positioning and supporting the end face of the inner convex tooth of the outer rotor 1; through the right chuck 7, the right blocking portion 8 and the first locking assembly, since the right clamping plate is coaxially rotatably connected to the positioning column 4, the right chuck 7 is rotated to drive the right blocking portion 8 to rotate toward the other side of the inner convex tooth of the outer rotor 1 until the right blocking portion 8 abuts against the other side of the end face of the inner convex tooth of the outer rotor 1. On one side, at this time, the right clamping block part 8 and the left clamping block part 6 clamp the inner convex teeth of the outer rotor 1, and the right clamping plate 7 is locked on the left clamping plate 5 by using the first locking assembly, so as to prevent the outer rotor 1 from rotating toward the other side of the end face a of the inner convex teeth, and prevent the right clamping plate 7 from rotating relative to the left clamping plate 5 or the fixed plate 10, thereby playing the role of clamping and supporting the end face of the inner convex teeth of the outer rotor 1; through the fixed plate 10, the pressure plate 11 and the second locking assembly, the two end faces of the outer rotor 1 are pressed between the fixed plate 10 and the pressure plate 11 by pushing the pressure plate 11, and the second locking assembly is used to lock the pressure plate 11 to one end face of the outer rotor 1, so as to prevent the outer rotor 1 from shaking along the length direction of the positioning column 4, and play the role of limiting and clamping the end face of the outer rotor 1;

[0030] When the inner hole size of the outer rotor 1 to be ground is different, since the clamping channel 9 formed between the left clamping block portion 6 and the right clamping block portion 8 gradually expands radially outward in the direction away from the positioning column 4, it is only necessary that the end face a of the inner convex tooth of the outer rotor 1 is always within the range of the clamping channel 9, that is, when the inner hole diameter of the outer rotor 1 is larger than the distance between the contracted end of the clamping channel 9 and the center axis of the positioning column 4, and the inner hole diameter of the outer rotor 1 is smaller than the distance between the expanded end of the clamping channel 9 and the center axis of the positioning column 4, when the outer rotor 1 is sleeved on the outer circumferential surface of the left chuck 5 and the right chuck 7, it is only necessary to place the inner convex tooth of the outer rotor 1 in alignment with the clamping channel 9, rotate the right chuck 7, and use the right clamping block portion 8 and the left clamping block portion 6 to clamp the end face a of the inner convex tooth of the outer rotor 1 on both sides, so as to clamp and position the inner convex teeth of the outer rotor 1 with different inner hole sizes.

[0031] Working principle: When the outer rotor 1 needs to be positioned, first, open the second locking assembly, remove the pressure plate 11 from the positioning column 4, and then align the inner convex teeth of the outer rotor 1 with the clamping channel 9, and push the outer rotor 1 to be inserted into the outer circumference of the left chuck 5 and the right chuck 7 until one end face of the outer rotor 1 contacts the fixed plate 10, and then rotate the outer rotor 1 until the left clamping block 6 abuts against the end face a of the inner convex teeth of the outer rotor 1, and then rotate the right chuck 7 to drive the right clamping block 8 to rotate and approach the other side of the end face a of the inner convex teeth of the outer rotor 1 until the right clamping block 8 abuts against the end face of the inner convex teeth of the outer rotor 1. On the other side of surface a, the right chuck 7 is then locked onto the left chuck 5 using the first locking assembly to prevent relative rotation between the right chuck 7 and the left chuck 5, which would affect the supporting and clamping effect on the inner convex teeth of the outer rotor 1. After that, the pressure plate 11 is re-sleeved on the positioning column 4 and the pressure plate 11 is pushed until the pressure plate 11 is pressed against the other end face of the outer rotor 1. Finally, the pressure plate 11 is locked onto the positioning column 4 using the second locking assembly, so that the two end faces of the outer rotor 1 are clamped between the fixed plate 10 and the pressure plate 11, thereby completing the automatic clamping and positioning of the inner hole and the two end faces of the outer rotor 1 to be ground.

[0032] Furthermore, the first locking assembly includes a plurality of first locking nuts 12 and a plurality of adjusting bolts 13, one end of the adjusting bolt 13 is fixedly connected to one end face of the left chuck 5, the other end face of the left chuck 5 is fixedly connected to one end face of the fixed plate 10, one end face of the left chuck 5 and one end face of the right chuck 7 fit each other, and the right chuck 7 is evenly provided with rotation holes 14 and rotation grooves 15; the adjusting bolt 13 passes through the rotation hole 14 and is threadedly connected with the first locking nut 12, the first locking nut 12 abuts against the other end face of the right clamping plate, and the pressure plate 11 is provided with a makeshift groove 16 for placing the adjusting bolt 13.

[0033] As can be seen from the above description, when the right chuck 7 needs to be rotated, first, the first locking nut 12 is unscrewed until the first locking nut 12 leaves the right chuck 7, and then the hand is placed in the rotating groove 15 to rotate the right chuck 7, driving the right clamping block 8 to rotate to the other side of the end face a of the inner convex tooth of the outer rotor 1. At this time, the right clamping block 8 and the left clamping block 6 clamp the opposite sides of the end face a of the inner convex tooth of the outer rotor 1, and then, the first locking nut 12 is reconnected to the adjusting bolt 13, and the first locking nut 12 is tightened. Rotate in the direction approaching the right chuck 7 until the first locking nut 12 is against the other end face of the right chuck 7 again, so as to achieve the effect of locking the right chuck 7 on the left chuck 5; the left chuck 5 is also arranged to be fixedly connected with the fixed plate 10, compared with the left chuck 5 being only fixedly connected with the positioning column 4, such an arrangement improves the overall structural stability; by providing a clearance groove 16, interference between the adjusting bolt 13 and the pressure plate 11 is avoided when the pressure plate 11 is pressed against one end face of the outer rotor 1.

[0034] Furthermore, the first locking assembly includes a plurality of first locking nuts 12 and a plurality of adjusting bolts 13, one end of the adjusting bolt 13 is fixedly connected to one end face of the right chuck 7, one end face of the left chuck 5 is in contact with one end face of the right chuck 7, the left chuck 5 is located between the pressure plate 11 and the right chuck 7, and the left chuck 5 is evenly provided with a plurality of rotating holes 14; the other end of the adjusting bolt 13 passes through the rotating hole 14 and is threadedly connected with the first locking nut 12, the first locking nut 12 is against the other end face of the left chuck 5, and the pressure plate 11 is provided with a makeshift groove 16 for placing the adjusting bolt 13.

[0035] From the above description, it can be known that when it is necessary to rotate the right chuck 7, first, unscrew the first locking nut 12 until the first locking nut 12 leaves the right chuck 7, manually grab the adjusting bolt 13 and rotate it, driving the right chuck 7 and the right clamping block 8 to rotate, thereby driving the adjusting bolt 13 to rotate in the rotating hole 14 until the right clamping block 8 abuts against the other side of the end face a of the inner convex tooth of the outer rotor 1. At this time, the right clamping block 8 and the left clamping block 6 clamp the end face a of the inner convex tooth of the outer rotor 1 on the opposite sides, and then, re-connect the first locking nut 12 to the adjusting bolt 13, rotate the first locking nut 12 in the direction close to the right chuck 7 until the first locking nut 12 abuts against the other end face of the left chuck 5 again, so as to achieve the effect of locking the right chuck 7 on the left chuck 5; by providing the clearance groove 16, interference between the adjusting bolt 13 and the pressure plate 11 is avoided when the pressure plate 11 is pressed against one end face of the outer rotor 1.

[0036] Furthermore, the right chuck 7 and the right clamping block 8 are integrally formed, and the left chuck 5 and the left clamping block 6 are also integrally formed.

[0037] From the above description, it can be seen that by arranging the right chuck 7 and the right clamping block part 8 as an integrally formed arrangement, and the left chuck 5 and the left clamping block part 6 as an integrally formed arrangement, the stability of the overall structure is improved, and the positioning and clamping stability of the end face a of the inner convex tooth of the outer rotor 1 is further ensured.

[0038] Further, the right chuck 7 includes a right inner ring 17, a right outer ring 18 and a first bolt 19, the inner side of the right inner ring 17 is rotatably connected to the positioning column 4, the right clamping block 8 is arranged on the outer side of the right outer ring 18, one end of the first bolt 19 is provided with a first nut 20, a first threaded hole 21 for connecting the first bolt 19 is opened between the right inner ring 17 and the right outer ring 18, a first sinking groove 22 for placing the first nut 20 is opened on the outer side of the right outer ring 18, and the first sinking groove 22 is located adjacent to the right clamping block 8 The left chuck 5 comprises a left inner ring 23, a left outer ring 24 and a second bolt 25. The inner side of the left inner ring 23 is fixedly connected to the positioning column 4. The left clamping block portion 6 is arranged on the outer side surface of the left outer ring 24. A second nut 26 is arranged at one end of the second bolt 25. A second threaded hole 27 for connecting the second bolt 25 is opened between the left inner ring 23 and the left outer ring 24. A second recessed groove 28 for placing the second nut 26 is opened on the outer side surface of the left outer ring 24. The second recessed groove 28 is located between adjacent left clamping blocks 6.

[0039] From the above description, it can be seen that when the number of inner convex teeth of the right clamping block part 8, the left clamping block part 6 or the outer rotor 1 needs to be replaced, or the end face a of the inner convex teeth of the outer rotor 1 is located outside the range of the clamping channel 9, that is, the inner hole diameter of the outer rotor 1 is larger than the shortest distance between the expanded end of the clamping channel 9 and the axis of the positioning column 4, or smaller than the shortest distance between the contracted end of the clamping channel 9 and the axis of the positioning column 4, it is only necessary to unscrew the first bolt 19 from the first threaded hole 21, remove the right clamping block part 8 and the right outer ring 18 from the right inner ring 17, replace the right clamping block part 8 and the right outer ring 18 of the corresponding diameter size or number, and rotate the first bolt 19 to the first threaded hole 21 again. In the threaded hole 21, the left block part 6 is replaced. Similarly, the second bolt 25 is unscrewed from the second threaded hole 27, the left block part 6 and the left outer ring 24 are removed from the left inner ring 23, and the left block part 6 and the left outer ring 24 of the corresponding diameter size are replaced. Then, the second bolt 25 is rotated into the second threaded hole 27 again, so that the right block part 8 and the left block part 6 can be replaced and the versatility can be further improved. By providing the first sink groove 22 and the second sink groove 28, interference between the first nut 20, the second nut 26 and the inner convex teeth of the outer rotor 1 is avoided, which affects the quality of the inner convex teeth of the outer rotor 1, thereby ensuring the good quality of the inner convex teeth of the outer rotor 1.

[0040] Furthermore, the second locking assembly includes a second locking nut 29 and a threaded column portion 30. The threaded column portion 30 is integrally formed and arranged at the other end of the positioning column 4. The pressure plate 11 is provided with a through hole 31 for the threaded column portion 30 to pass through; the second locking nut 29 is threadedly connected to the threaded column portion 30, and the second locking nut 29 is against an end surface of the pressure plate 11 away from the fixed plate 10.

[0041] From the above description, it can be known that before the outer rotor 1 is mounted on the outer circumference of the left chuck 5 and the right chuck 7, the second locking nut 29 is first unscrewed from the threaded column portion 30 at the other end of the positioning column 4, and then the pressure plate 11 is removed from the threaded column portion 30, so as to realize the function of disassembling and separating the pressure plate 11 from the positioning column 4; when the two end surfaces of the outer rotor 1 are compressed between the fixed plate 10 and the pressure plate 11, the second locking nut 29 is reconnected to the threaded column portion 30 at the other end of the positioning column 4, and the second locking nut 29 is rotated again in the direction close to the pressure plate 11 until the second locking nut 29 rests on the end surface of the pressure plate 11 away from the fixed plate 10, thereby locking the pressure plate 11.

[0042] Furthermore, the contact surface between the left block portion 6 and the inner convex tooth end surface of the outer rotor 1 is arranged in an arc shape, and the contact surface between the right block portion 8 and the inner convex tooth end surface of the outer rotor 1 is arranged in an arc shape. Both the left block portion 6 and the right block portion 8 are provided with anti-slip pads 32.

[0043] From the above description, it can be seen that the friction between the left and right block parts 6 and 8 and the ends of the inner convex teeth of the outer rotor 1 is increased by the anti-skid pad 32, which plays a role in improving the clamping force on the end faces of the inner convex teeth of the outer rotor 1; at the same time, the anti-skid pad 32 is combined with the left and right block parts 6 and 8 to set the contact surfaces with the inner convex tooth end faces of the outer rotor 1 to be arc-shaped, so as to avoid mutual collision and damage between the inner convex tooth end faces of the outer rotor 1 and the left and right block parts 6 and 8, thereby further ensuring the quality of the inner convex teeth of the outer rotor 1.

[0044] Furthermore, the pressure plate 11 is detachably connected with a backing ring 33 for pressing one end of the outer rotor 1 .

[0045] From the above description, it can be seen that when the thickness of the outer rotor 1 is small, that is, the distance between the two ends of the outer rotor 1 is small, installing a gasket ring 33 of corresponding thickness on the pressure plate 11 can play a role in positioning and clamping the outer rotors 1 of different thicknesses, thereby further improving the overall versatility.

[0046] Reference Figures 2 to 6 , the first embodiment provided by the utility model is:

[0047] A positioning tool for an outer rotor cylindrical grinder comprises a positioning column 4, which is coaxially fixedly connected to a left chuck 5, on the outer circumferential surface of which a plurality of left blocking portions 6 are evenly arranged, and the positioning column 4 is coaxially rotatably connected to a right chuck 7, on the outer circumferential surface of which a plurality of right blocking portions 8 are evenly arranged, and a first locking assembly for locking the right chuck 7 is detachably connected between the left chuck 5 and the right chuck 7; one end of the positioning column 4 is fixedly connected to a fixed disk 10, and a sliding sleeve at the other end of the positioning column 4 is provided with a pressure plate 11 for pressing the outer rotor 1 onto the fixed disk 10, and the pressure plate 11 is detachably connected to a gasket 33 for pressing one end of the outer rotor 1; the other end of the positioning column 4 is detachably connected to a second locking assembly for locking the pressure plate 11, and the left chuck 5 and the right chuck 7 are located between the fixed disk 10 and the pressure plate 11.

[0048] The right chuck 7 and the right clamping block 8 are integrally formed, and the left chuck 5 and the left clamping block 6 are also integrally formed; the left clamping block 6 and the right clamping block 8 are both located in the inner tooth groove b of the outer rotor 1, and respectively abut against the opposite sides of the inner convex tooth end surface of the outer rotor 1; a clamping channel 9 for clamping and placing the inner convex tooth end surface of the outer rotor 1 with different inner hole sizes is formed between the left clamping block 6 and the right clamping block 8, and the clamping channel 9 is radially expanded outward in the direction away from the positioning column 4, and the contact surface between the left clamping block 6 and the inner convex tooth end surface of the outer rotor 1 is arranged in an arc shape, and the contact surface between the right clamping block 8 and the inner convex tooth end surface of the outer rotor 1 is arranged in an arc shape, and the left clamping block 6 and the right clamping block 8 are both provided with anti-slip pads 32.

[0049] The first locking assembly includes a plurality of first locking nuts 12 and a plurality of adjusting bolts 13, one end of the adjusting bolt 13 is fixedly connected to one end face of the left chuck 5, the other end face of the left chuck 5 is fixedly connected to one end face of the fixed plate 10, one end face of the left chuck 5 and one end face of the right chuck 7 fit each other, and the right chuck 7 is evenly provided with rotation holes 14 and rotation grooves 15; the adjusting bolt 13 passes through the rotation hole 14 and is threadedly connected with the first locking nut 12, the first locking nut 12 is against the other end face of the right clamping plate, and the pressure plate 11 is provided with a makeshift groove 16 for placing the adjusting bolt 13.

[0050] The second locking assembly includes a second locking nut 29 and a threaded column 30. The threaded column 30 is integrally formed and arranged at the other end of the positioning column 4. The pressure plate 11 is provided with a through hole 31 for the threaded column 30 to pass through. The second locking nut 29 is threadedly connected to the threaded column 30, and the second locking nut 29 is against an end face of the pressure plate 11 away from the fixed plate 10.

[0051] The second embodiment is different from the first embodiment in that Figure 7As shown, the first locking assembly includes a plurality of first locking nuts 12 and a plurality of adjusting bolts 13, one end of the adjusting bolt 13 is fixedly connected to one end face of the right chuck 7, one end face of the left chuck 5 is in contact with one end face of the right chuck 7, the left chuck 5 is located between the pressure plate 11 and the right chuck 7, and the left chuck 5 is evenly provided with a plurality of rotating holes 14; the other end of the adjusting bolt 13 passes through the rotating hole 14 and is threadedly connected with the first locking nut 12, the first locking nut 12 is against the other end face of the left chuck 5, and the pressure plate 11 is provided with a makeshift groove 16 for placing the adjusting bolt 13.

[0052] Embodiment 3 is different from Embodiment 1 in that Figure 8 and Fig. 9 As shown, the right chuck 7 includes a right inner ring 17, a right outer ring 18 and a first bolt 19. The inner side of the right inner ring 17 is rotatably connected to the positioning column 4. The right clamping block 8 is arranged on the outer side of the right outer ring 18. A first nut 20 is arranged at one end of the first bolt 19. A first threaded hole 21 for connecting the first bolt 19 is provided between the right inner ring 17 and the right outer ring 18. A first sinking groove 22 for placing the first nut 20 is provided on the outer side of the right outer ring 18. The first sinking groove 22 is located between the adjacent right clamping block 8. The left chuck 5 comprises a left inner ring 23, a left outer ring 24 and a second bolt 25. The inner side of the left inner ring 23 is fixedly connected to the positioning column 4. The left clamping block portion 6 is arranged on the outer side of the left outer ring 24. A second nut 26 is arranged at one end of the second bolt 25. A second threaded hole 27 for connecting the second bolt 25 is opened between the left inner ring 23 and the left outer ring 24. A second sink groove 28 for placing the second nut 26 is opened on the outer side of the left outer ring 24. The second sink groove 28 is located between adjacent left clamping blocks 6.

[0053] In summary, compared with the prior art, the utility model has the advantages of easy positioning and fixing, high versatility and low cost; the outer rotor 1 is sleeved on the outer peripheral surface of the left chuck 5 by means of the positioning column 4, the left chuck 5 and the left block portion 6, and the left block portion 6 is used to abut against one side of the end face a of the inner convex tooth of the outer rotor 1 to prevent the outer rotor 1 from rotating in one direction around the axis of the positioning column 4, thereby playing a role in preliminary positioning and supporting the inner convex tooth of the outer rotor 1; the right chuck 7 is rotated by means of the right chuck 7, the right block portion 8 and the first locking assembly until the right block portion 8 abuts against the other side of the end face a of the inner convex tooth of the outer rotor 1, and the opposite sides of the end face a of the inner convex tooth are clamped by the right block portion 8 and the left block portion 6, and the right chuck 7 is locked by means of the first locking assembly, thereby playing a role in The inner convex tooth end faces of the outer rotor 1 are clamped and supported; the fixed plate 10, the pressure plate 11 and the second locking assembly are used to limit and clamp the two end faces of the outer rotor 1; by setting a clamping channel 9 that gradually expands radially outward in the direction away from the positioning column 4, the end faces a of the inner convex teeth of the outer rotor 1 with various different diameters can be accommodated, which meets the positioning and clamping requirements of the outer rotor 1 with various different inner hole diameters. When clamping and positioning, it is only necessary to place the multiple inner convex teeth of the outer rotor 1 in the corresponding clamping channels 9, and then rotate the right clamping plate 7 until the end faces a of the inner convex teeth of the outer rotor 1 are clamped, and the outer rotor 1 cannot rotate around the axis of the positioning column 4, so as to achieve the function of clamping and positioning the inner convex teeth of the outer rotor 1 with different inner hole sizes.

[0054] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A positioning fixture for an external rotor cylindrical grinder, characterized in that: The locking plate is configured to lock the locking plate when the locking plate is in a state of being rotated relative to the locking plate, and the locking plate is configured to lock the locking plate when the locking plate is in a state of being rotated relative to the locking plate.

2. The positioning fixture for an external rotor cylindrical grinder according to claim 1, characterized in that: The first locking assembly includes a plurality of first locking nuts and a plurality of adjusting bolts, one end of the adjusting bolt is fixedly connected to one end face of the left chuck, the other end face of the left chuck is fixedly connected to one end face of the fixed plate, one end face of the left chuck and one end face of the right chuck fit each other, and the right chuck is evenly provided with rotation holes and rotation grooves; the adjusting bolt passes through the rotation hole and is threadedly connected to the first locking nut, the first locking nut abuts against the other end face of the right clamp, and the pressure plate is provided with a makeshift groove for placing the adjusting bolt.

3. The positioning fixture for an external rotor cylindrical grinder according to claim 1, characterized in that: The first locking assembly includes a plurality of first locking nuts and a plurality of adjusting bolts, one end of the adjusting bolt is fixedly connected to an end face of the right chuck, one end face of the left chuck fits with an end face of the right chuck, the left chuck is located between the pressure plate and the right chuck, and the left chuck is evenly provided with a plurality of rotating holes; the other end of the adjusting bolt passes through the rotating hole and is threadedly connected to the first locking nut, the first locking nut abuts against the other end face of the left chuck, and the pressure plate is provided with a makeshift groove for placing the adjusting bolt.

4. The positioning fixture for an external rotor cylindrical grinder according to claim 1, characterized in that: The right chuck and the right clamping block are integrally formed, and the left chuck and the left clamping block are also integrally formed.

5. The positioning fixture for an external rotor cylindrical grinder according to claim 1, characterized in that: The right chuck comprises a right inner ring, a right outer ring and a first bolt, the inner side of the right inner ring is rotatably connected to the positioning column, the right clamping block portion is arranged on the outer side surface of the right outer ring, a first nut is arranged at one end of the first bolt, a first threaded hole for connection with the first bolt is opened between the right inner ring and the right outer ring, a first countersunk groove for placement of the first nut is opened on the outer side surface of the right outer ring, and the first countersunk groove is located between adjacent right clamping block portions; the left chuck comprises a left inner ring, a left outer ring and a second bolt, the inner side of the left inner ring is fixedly connected to the positioning column, the left clamping block portion is arranged on the outer side surface of the left outer ring, a second nut is arranged at one end of the second bolt, a second threaded hole for connection with the second bolt is opened between the left inner ring and the left outer ring, and a second countersunk groove for placement of the second nut is opened on the outer side surface of the left outer ring, and the second countersunk groove is located between adjacent left clamping block portions.

6. The positioning fixture for an external rotor cylindrical grinder according to claim 1, characterized in that: The second locking assembly includes a second locking nut and a threaded column portion, the threaded column portion is integrally formed and arranged at the other end of the positioning column, and the pressure plate is provided with a through hole for the threaded column portion to pass through; the second locking nut is threadedly connected to the threaded column portion, and the second locking nut is against an end surface of the pressure plate away from the fixed plate.

7. The positioning fixture for an external rotor cylindrical grinder according to claim 1, characterized in that: The contact surface between the left clamping block and the inner convex tooth end surface of the outer rotor is arranged in an arc shape, and the contact surface between the right clamping block and the inner convex tooth end surface of the outer rotor is arranged in an arc shape. Both the left clamping block and the right clamping block are provided with anti-slip pads.

8. The positioning fixture for an external rotor cylindrical grinder according to claim 1, characterized in that: The pressure plate is detachably connected with a gasket ring for pressing one end of the outer rotor.

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