NZ759214A - Auxiliary device for welding rotor core and end ring - Google Patents

Abstract

The present invention is aimed at providing an auxiliary device for welding a rotor core and an end ring, which can realize the positioning of the end ring and the rotor core so as to facilitate the welding of the end ring and the rotor core. The device comprises a positioning sleeve, an annular press block and a fixed cover, wherein an accommodating groove is formed on the positioning sleeve; a positioning column is arranged in the center of the accommodating groove; the fixed cover comprises a cover top; an annular fixation portion is extended downward from an outer circumferential edge of the cover top; threaded structures fitted with each other are formed on an inner wall of the fixation portion and an outer wall of an upper end of the positioning sleeve; an evading groove running through the cover top from upper and lower sides is formed on the cover top; and, when the annular press block is placed in the accommodating groove, the rotor core is sheathed on the positioning column, an inner circumferential wall of the rotor core comes into contact with an outer circumferential wall of the positioning column, and the fixed cover is rotated on the positioning sleeve so that a lower end face of the cover top is resisted against an upper end of the annular press block and the rotor core and the end ring are limited between a lower end face of the annular press block and the bottom of the accommodating groove. The invention aims to provide an auxiliary welding device with improved concentric alignment.

Description

AUXILIARY DEVICE FOR WELDING ROTOR CORE AND END RING Technical Field of the Invention The present invention relates to an auxiliary device for ling motor components and in particular to an auxiliary device for welding a rotor core and an end ring.

Background of the Invention A rotor core and an end ring need to be welded er. However, existing means for oning the rotor core and the end ring are unsatisfactory and it is difficult to realize the concentricity of the end ring and the rotor core, so the position of the end ring after welding is deviated from the set position.

Summam of the Invention The present invention is aimed at providing an auxiliary device for welding a rotor core and an end ring, which can realize the positioning of the end ring and the rotor core so as to facilitate the welding of the end ring and the rotor core.

For this purpose, the present invention employs the ing technical solutions. An auxiliary device for welding a rotor core and an end ring is ed, including a positioning sleeve, an annular press block and a fixed cover, wherein an accommodating groove for accommodating the annular press block, the rotor core and the end ring is formed on the positioning sleeve; a positioning column for positioning the circumferential on of the rotor core is arranged in the center of the odating groove; the fixed cover includes a cover top; an annular fixation portion is ed downward from an outer circumferential edge of the cover top; threaded structures fitted with each other are arranged on an inner wall of the fixation portion and an outer wall of an upper end of the positioning sleeve; an evading groove running through the cover top from upper and lower sides is formed on the cover top; the inner diameter of the r press block is greater than the inner diameter of the end ring and the inner diameter of the evading groove, the outer diameter of the annular press block is less than the outer diameter of the end ring, and the inner diameter of the evading groove is greater than the inner diameter of the end ring; when the annular press block is placed in the accommodating groove, the rotor core is sheathed on the oning column, and an inner circumferential wall of the rotor core comes into t with an outer circumferential wall of the positioning column; the fixed cover is fixed to the positioning sleeve, so that the cover top is located on an axial side of the rotor core and the end ring; and, the fixed cover is rotated on the positioning sleeve, so that a lower end face of the cover top is resisted against an upper end of the annular press block, and the rotor core and the end ring are limited between a lower end face of the annular press block and the bottom of the accommodating groove.

When in use of the auxiliary device of the present invention, the rotor cor e and the end ring are successively placed in the accommodating groove, and the annular press block is then placed on the end ring. The end ring is presse d on the rotor core through the cooperation of the fixed cover with the positioni ng sleeve, in order to ensure that the end ring is resisted against the axial surf ace of the rotor core. Subsequently, the end ring and the rotor core are fixed b y laser g. The positioning column is used for realizing the circumferentia | positioning of the rotor core, and the annular press block is used for realizing the axial positioning of the rotor core. The evading groove on the fixed cover i 8 used for evading a welding gun. ably, an inner circumferential edge of the cross-section of the odating groove is circular; and, when the end ring is placed in the accommodating groove, an outer circumferential wall of the end ring comes into contact with an inner circumferential wall of the accommodating groove.

The outer edge of the end ring is positioned by the circumferential wall of the odating groove, so that the end ring is concentric with the rotor core.

Preferably, at least two positioning holes, running through the rotor core from upper and lower sides, are formed on the rotor core; positioning grooves corresponding to the positioning holes are formed in a ring portion of the end ring; an inner edge of the ring portion of the end ring is extended outward to form the oning grooves; positioning pins are fitted in the positioning holes and the positioning grooves; and, the positioning holes, the positioning grooves and the oning pins are in one-to-one pondence to each other. The positioning pins are used for realizing the angle adjustment and alignment of the rotor core and the end ring.

Preferably, each of the positioning pins includes a lower oning pin portion and an upper positioning pin portion; when a positioning pin is fitted with the rotor core and the end ring, the lower positioning pin portion successively runs through the positioning groove and the positioning hole, and an upper end of the upper positioning pin portion is located on the ring portion of the end ring; and, when the annular press block is placed on the ring portion of the end ring, the annular press block is sheathed on the upper positioning pin portion, and the inner wall of the annular press block comes into contact with an outer circumferential wall of each upper positioning pin portion. The upper positioning pin n is used for positioning the annular press block.

Preferably, a fixation hole is formed on the bottom of the accommodating groove of the positioning sleeve, and a fixation pin is arranged in the fixation hole; and, when the rotor core is placed in the accommodating groove, an upper end of the fixation pin is located in the oning hole on the rotor core.

With this arrangement, the rotor core is positioned, and the rotation of the rotor core is prevented.

Preferably, the diameter of the positioning grooves is greater than the diameter of the oning holes; and, when the lower positioning pin portions are d in the positioning holes so that the upper positioning pin portions are supported on the rotor core, circumferential walls of the positioning grooves come into t with outer ferential walls of the upper positioning pin portions. With this arrangement, the upper positioning pin portions are ted by the axial end face of the rotor core, so that the inclination of the positioning pins due to non-uniform thickness of the end ring is avoided, and the positioning of the annular press block by the positioning pins is .

Preferably, a central hole running through the positioning sleeve from upper and lower sides is formed on the positioning sleeve; the positioning column includes an upper positioning column section and a lower positioning column section; and, when the lower positioning column section is located in the central hole, the upper positioning column section is supported on the bottom of the odating groove. With this arrangement, it is convenient to manufacture and assemble the auxiliary device of the present invention.

Preferably, the positioning sleeve is equipped with an unloading block; at least two evading holes running through the positioning sleeve from upper and lower sides are formed on the oning sleeve; the evading holes are deviated from the positioning holes; at least two ejector columns are arranged on the unloading block; and, when the positioning sleeve is placed on the unloading block, upper ends of the ejector columns extend to above the bottom of the accommodating groove through the evading holes. With this arrangement, it is convenient to unload the welded rotor core.

The present invention can realize the positioning of an end ring and a rotor core so as to facilitate the welding of the end ring and the rotor core.

Brief ption of the gs Fig. 1 is a schematic s re diagram of the present invention when in use; Fig. 2 is an exploded view of the present invention; Fig. 3 is a schematic structure diagram of the present invention after the rotor core is welded and fixed to the end ring; Fig. 4 is a schematic structure diagram of the unloading block in the present invention when in use; and Fig. 5 is a schematic structure diagram of the unloading block in the present invention.

Detailed ption of the Invention The present invention will be further described below by specific embodiments with reference to the accompanying drawings.

As shown in Figs. 1-3, the auxiliary device of the present invention is used for positioning a rotor core 4 and an end ring 5. The auxiliary device is used for positioning and fixing the rotor core 4 and the end ring 5 so as to facilitate subsequent welding to form a weld mark 55. The auxiliary device for welding a rotor core and an end ring in the present invention includes a positioning sleeve 1, an annular press block 2 and a fixed cover 3. An accommodating groove 11 for accommodating the annular press block 2, the rotor core 4 and the end ring 5 is formed on the positioning sleeve 1. A positioning column 6 for oning the circumferential position of the rotor core 4 is arranged in the center of the odating groove 11. The fixed cover 3 es a cover top 31. An annular fixation portion 32 is extended downward from an outer ferential edge of the cover top 31. Threaded structures fitted with each other are arranged on an inner wall of the fixation portion 32 and an outer wall of an upper end of the positioning sleeve 1. An evading groove 33 running through the cover top 31 from upper and lower sides is formed on the cover top 31. The inner diameter of the annular press block 2 is greater than the inner diameter of the end ring 5 and the inner diameter of the evading groove 33, the outer er of the annular press block 2 is less than the outer diameter of the end ring 5, and the inner diameter of the evading groove 33 is r than the inner er of the end ring 5. When the annular press block 2 is placed in the accommodating groove 11, the rotor core 4 is sheathed on the positioning column 6, and an inner circumferential wall of the rotor core 4 comes into contact with an outer circumferential wall of the positioning column 6. The fixed cover 3 is fixed to the positioning sleeve 1, so that the cover top 31 is located on an axial side of the rotor core 4 and the end ring 5. The fixed cover 3 is rotated on the positioning sleeve 1, so that a lower end face of the cover top 31 is resisted t an upper end face of the annular press block 2, and the rotor core 4 and the end ring 5 are limited between a lower end face of the annular press block 2 and the bottom of the accommodating groove 11.An inner circumferential edge of the cross-section of the accommodating groove 11 is circular. When the end ring 5 is placed in the accommodating groove 11, an outer circumferential wall of the end ring 5 comes into contact with an inner circumferential wall of the accommodating groove 11.

Two positioning holes 41, running through the rotor core 4 from upper and lower sides, are formed on the rotor core 4. Positioning grooves 52 corresponding to the positioning holes 41 are formed in a ring portion 51 of the end ring 5. An inner edge of the ring portion 51 of the end ring 5 is extended outward to form the positioning grooves 52. Positioning pins 7 are fitted in the positioning holes 41 and the positioning grooves 52. The positioning holes 41, the positioning grooves 52 and the positioning pins 7 are in one-to-one correspondence to each other.

Each of the positioning pins 7 includes a lower positioning pin portion 71 and an upper positioning pin portion 72. When a positioning pin 7 is fitted with the rotor core 4 and the end ring 5, the lower positioning pin n 71 successively runs through the positioning groove 52 and the positioning hole 41, and an upper end of the upper positioning pin portion 72 is located on the ring n of the end ring. When the annular press block 2 is placed on the ring n 51 of the end ring 5, the annular press block 2 is ed on the upper oning pin portion 71, and the inner wall of the annular press block 2 comes into contact with an outer circumferential wall of each upper positioning pin n 71. The diameter of the positioning grooves 52 is greater than the diameter of the positioning holes 41. When the lower positioning pin portions 72 are located in the positioning holes 41 so that the upper positioning pin portions 71 are supported on the rotor core 4, circumferential walls of the positioning grooves 62 come into contact with outer circumferential walls of the upper positioning pin portions 71. ion holes 12 is formed on the bottom of the accommodating groove 11 of the positioning sleeve 1, and a on pin 8 is arranged in the fixation hole 12. When the rotor core 4 is placed in the accommodating groove 11, an upper end of the fixation pin 8 is d in the positioning hole 41 on the rotor core 4.

A central hole 13 running through the positioning sleeve 1 from upper and lower sides is formed on the positioning sleeve 1. The positioning column 6 includes an upper positioning column section 61 and a lower positioning column section 62. When the lower positioning column section 62 is located in the central hole 13, the upper oning column section 61 is supported on the bottom of the accommodating groove 11, and the rotor core 4 is sheathed outside the upper positioning column section 61 of the positioning column.

As shown in Figs. 4 and 5, the positioning sleeve 1 is equipped with an unloading block 9. Two evading holes running through the oning sleeve 1 from upper and lower sides are formed on the positioning sleeve 1. The evading holes are deviated from the positioning holes 41. Two ejector columns 91 are arranged on the unloading block 9. When the positioning sleeve 1 is placed on the unloading block 9, upper ends of the ejector columns 91 extend to above the bottom of the accommodating groove 11 through the evading holes.

When in use of the auxiliary device of the present invention, the positioning sleeve is placed on a fixation platform, and a fixation groove for positioning the lower end of the positioning sleeve is formed on the on platform. The fixation groove is the same as the lower end of the positioning sleeve in shape. A laser g device is ed on the fixation platform side.

The positioning pins are placed in the fixation hole on the oning sleeve. Then, the rotor core and the end ring are successively placed in the accommodating groove. The end ring is rotated to align the positioning holes with the positioning grooves, and the positioning pins are fitted with the rotor core and the end ring, so that the lower positioning pin portions are d in the rotor core and the upper positioning pin portions are supported on the rotor core. Subsequently, the annular press block is placed on the ring portion of the end ring, and the annular press block is positioned by the upper positioning pin portions. Finally, the fixed cover is in threaded fit with the oning sleeve, and the fixed cover is rotated to compress the rotor core and the end ring. After the rotor core and the end ring are positioned, the laser welding device is activated, and a welding gun arranged vertically is aligned to weld a portion between the inner edge of the evading groove and the inner edge of the end ring.

The present ion can realize the positioning of an end ring and a rotor core so as to facilitate the welding of the end ring and the rotor core.

Claims (8)

1.Claims 1. An auxiliary device for g a rotor core and an end ring, comprising a positioning sleeve, an annular press block and a fixed cover, wherein an accommodating groove for accommodating the annular press block, the rotor 5 core and the end ring is formed on the positioning ; a positioning column for positioning the circumferential position of the rotor core is arranged in the center of the accommodating groove; the fixed cover comprises a cover top; an annular fixation portion is extended downward from an outer circumferential edge of the cover top; threaded structures fitted with each other are arranged 10 on an inner wall of the fixation portion and an outer wall of an upper end of the positioning sleeve; an evading groove running through the cover top from upper and lower sides is formed on the cover top; the inner diameter of the annular press block is greater than the inner diameter of the end ring and the inner diameter of the evading groove, the outer diameter of the r press 15 block is less than the outer er of the end ring, and the inner diameter of the g groove is greater than the inner diameter of the end ring; when the annular press block is placed in the accommodating groove, the rotor core is sheathed on the positioning column, and an inner circumferential wall of the rotor core comes into contact with an outer circumferential wall of the 20 positioning column; the fixed cover is fixed to the positioning , so that the cover top is located on an axial side of the rotor core and the end ring; and, the fixed cover is rotated on the positioning sleeve, so that a lower end face of the cover top is resisted against an upper end of the annular press block, and the rotor core and the end ring are limited between a lower end face of the annular 25 press block and a bottom of the accommodating groove.

2. The auxiliary device for welding a rotor core and an end ring according to claim 1, wherein an inner circumferential edge of the section of the odating groove is circular; and, when the end ring is placed in the accommodating groove, an outer circumferential wall of the end ring comes 30 into contact with an inner circumferential wall of the accommodating groove.

3. The auxiliary device for welding a rotor core and an end ring according to claim 1, wherein at least two positioning holes, running through the rotor core from upper and lower sides, are formed on the rotor core; positioning grooves corresponding to the positioning holes are formed in a ring portion of 5 the end ring; an inner edge of the ring n of the end ring is extended outward to form the positioning grooves; oning pins are fitted in the positioning holes and the oning grooves; and, the positioning holes, the positioning grooves and the positioning pins are in one-to-one correspondence to each other. 10

4. The auxiliary device for welding a rotor core and an end ring according to claim 3, wherein each of the positioning pins ses a lower positioning pin portion and an upper positioning pin n; when a positioning pin is fitted with the rotor core and the end ring, the lower positioning pin portion successively runs through the positioning groove and the positioning hole, and 15 an upper end of the upper positioning pin n is located on the ring portion of the end ring; and, when the annular press block is placed on the ring portion of the end ring, the annular press block is sheathed on the upper positioning pin portion, and the inner wall of the annular press block comes into contact with an outer circumferential wall of each upper positioning pin portion. 20

5. The ary device for welding a rotor core and an end ring according to claim 3, wherein a fixation hole is formed on the bottom of the accommodating groove of the positioning sleeve, and a fixation pin is arranged in the fixation hole; and, when the rotor core is placed in the accommodating groove, an upper end of the on pin is located in the positioning hole on the 25 rotor core.

6. The auxiliary device for welding a rotor core and an end ring according to claim 4, wherein the diameter of the positioning grooves is greater than the diameter of the positioning holes; and, when the lower positioning pin portions are located in the positioning holes so that the upper positioning pin portions 30 are supported on the rotor core, circumferential walls of the positioning grooves come into contact with outer ferential walls of the upper positioning pin portions.

7. The auxiliary device for welding a rotor core and an end ring according to claim 1, wherein a central hole running through the positioning sleeve from 5 upper and lower sides is formed on the positioning sleeve; the positioning column comprises an upper positioning column section and a lower oning column section; and, when the lower oning column n is located in the central hole, the upper positioning column section is supported on the bottom of the accommodating groove. 10

8. The auxiliary device for welding a rotor core and an end ring according to claim 3, wherein the positioning sleeve is equipped with an unloading block; at least two evading holes running through the oning sleeve from upper and lower sides are formed on the positioning sleeve; the evading holes are deviated from the positioning holes; at least two ejector columns are arranged 15 on the unloading block; and, when the positioning sleeve is placed on the unloading block, upper ends of the ejector columns extend to above the bottom of the accommodating groove through the evading holes. fig”? \CIV»? |.A A 3 é @7474