A general device for stacking inclined slot stator core

Abstract

The present application relates to the technical field of stator core lamination, in particular to a general device for lamination of slant-slot stator core. The present application provides a new general device for lamination of slant-slot stator core to solve the problem of many defects of the existing lamination device for slant-slot stator core. The device comprises a cuboid cylinder composed of four vertical plates, four arc plates with their inner sides being planes and their outer sides being arc surfaces are fixed on the outer sides of the four vertical plates in parallel, the arc surfaces of the four arc plates are arc surfaces in the same circle and their diameters are adapted to the inner diameter of the stator core, a groove for guiding is opened on the outer side of one of the arc plates, a positioning key is slidably installed in the groove, the positioning key comprises a positioning plate slidably installed in the groove, a cuboid positioning strip is fixed on the outer side of the positioning plate in vertical and is arranged in a slanting direction along the height, and the width of the positioning strip is adapted to the slot width of the stator core. The device is simple in structure and practical.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stator core lamination, in particular to the technical field of slant slot stator core lamination, and specifically to a universal device for slant slot stator core lamination. BACKGROUND

[0002] During the operation of the motor, electromagnetic noise is prone to occur. The cause is generally that different order harmonics of the motor stator core cause the vibration of the corresponding frequency of the generator. When the frequency of the motor radial force wave is close to or equal to a certain vibration frequency of the stator core, resonance will occur. Harmonics are always present during the operation of the motor and cannot be avoided, but we can weaken high-order harmonics through various methods to avoid the high-frequency electromagnetic noise that is difficult for the human ear to accept. The use of slant slot stator core is an effective method.

[0003] Currently, the manufacturing technology of slant slot stator core is generally divided into two types. One is the punching type slant slot stator core, that is, rotating a certain angle of the stator punching sheet on the punching equipment with a rotating function, and then sequentially laminating and fixing it to form a slant slot stator core. The other is the lamination type slant slot stator core, that is, the stator punching sheet is punched according to the requirements of the traditional straight slot stator punching sheet, and the slant slot stator core with a specified slant core slot is formed by artificially twisting the straight slot stator punching sheet through a special tool during lamination. Since the punching type slant slot core requires high equipment, most enterprises currently use the lamination type slant slot stator core.

[0004] The existing slant slot stator core lamination equipment has the following disadvantages: 1) the existing slant slot stator core lamination equipment needs to artificially twist the straight slot stator punching sheet into a slant slot stator punching sheet through a special tool, so the slot type quality is not easy to control and the positioning accuracy is low; 2) the existing slant slot stator core lamination equipment is a special device, and when any one of the three dimensions (length, diameter, and slot type) of the slant slot stator core changes, a new device needs to be manufactured, which has a long manufacturing cycle and high cost; 3) the slant slot stator core has poor inner diameter positioning function, and the large tolerance cannot accurately position the inner diameter of the slant slot stator core, and the small tolerance easily causes the slant slot stator core to be difficult to separate, which causes the stator core to be damaged during the separation process and leads to the scrap of the stator core. SUMMARY

[0005] In order to solve the above-mentioned problems of the existing slant slot stator core lamination equipment, the present application provides a new universal device for slant slot stator core lamination.

[0006] This invention is achieved using the following technical solution: A universal device for stacking inclined slot stator cores includes a cuboid cylindrical body composed of four vertical plates arranged axially along the height direction. Four arc plates, each with a flat inner surface and an arc outer surface, are fixed parallel to each of the four vertical plates. The four arc plates are arranged in a cross shape, and their arc surfaces are arc surfaces within the same circle, with their diameters matching the inner diameter of the stator core. One of the arc plates has a guide groove extending through the height direction on its outer side. A positioning key is slidably installed in the groove. The positioning key includes a positioning plate that slides vertically within the groove. A cuboid positioning strip, arranged obliquely along the height direction, is vertically fixed on the outer surface of the positioning plate. The width of the positioning strip matches the slot width of the stator core (the matching is a clearance fit).

[0007] In use, according to the inner diameter of the inclined slot stator core to be stacked, select an arc plate whose inner diameter matches that of the arc plate and install it on the outside of the vertical plate. Slide the positioning plate in the positioning key into the groove. Slide the stator laminations onto the outside of the four arc plates from the top. At the same time, insert the positioning strip into one of the slots of the straight slot stator laminations. Then install the stator laminations from top to bottom along the inclined direction of the positioning strip. Install all the stator laminations in sequence according to the above method, so that all the stator laminations are stacked obliquely along the inclined direction of the positioning strip. After all the stator laminations are installed, an inclined slot stator core is formed. Then, fix the inclined slot stator core and the positioning key with tie rods, end plates, etc. (how to fix the positioning key and the inclined slot stator core during demolding is a conventional technical means for those skilled in the art) and then lift it to remove it from the equipment.

[0008] Furthermore, each vertical plate is connected to its corresponding arc plate by a flange. The outer surface of each flange is detachably and fixedly connected to its corresponding arc plate. Two adjacent flanges are fixed flanges, and two other adjacent flanges are movable flanges. The inner surfaces of the two fixed flanges are fixedly connected to their corresponding vertical plates. The inner surfaces of the two movable flanges are radially telescopically connected to their corresponding vertical plates using at least two synchronously controlled hydraulic telescopic structures. The guide groove is located on the outer side of the arc plate corresponding to one of the fixed flanges. In use, the two movable flanges are controlled to expand and cooperate with the two fixed flanges to press against the inner diameter of the stator core, positioning the inner circle of the stator core. After the inclined slot stator core is pressed, the two movable flanges are synchronously controlled to retract, and then the inclined slot stator core is removed. This pressing equipment with this structure makes removal easier. At the same time, according to the inner diameter of the stator core, an arc plate that matches the inner diameter of the stator core can be replaced, making the equipment a universal inclined slot stator core pressing equipment.

[0009] The beneficial effects generated by the present application are as follows: 1) the device does not need to artificially twist the straight slot stator punching sheet into a slant slot stator punching sheet, but breaks the conventional idea, that is, the straight slot stator punching sheet is staggered and stacked along the slant direction to form a slant slot stator core through the positioning key, the structure is simple and practical, the slant slot straight stacking technical bottleneck problem is solved, the slant slot core manufacturing difficulty is reduced, and the slant slot core quality is ensured; 2) the device becomes a universal slant slot stator core stacking device through the detachable fixed connection structure with the width plate, and can be applied to the slant slot stator core stacking of traction motors and double-fed wind power, saves the manufacturing period and manufacturing cost of the device specialization, and provides guarantee for short delivery period of motor products; 3) the device is easy to separate the slant slot stator core through the hydraulic telescopic structure, the stator core is not easy to be damaged, and the positioning function is good, so that the motor quality is effectively improved; 4) the positioning key integrates the positioning plate (straight key) and the positioning strip (slant key) structure, converts the slant key into a straight key for easy separation, and avoids the difficulty of stator core separation. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0011] Figure 2 It is a top view of the universal slant slot stator core stacking device;

[0012] Figure 3 It is a schematic diagram of the structure of the base;

[0013] Figure 4 It is a schematic diagram of the combined limiting structure of the pull rod;

[0014] Figure 5 It is a schematic diagram of the hydraulic telescopic structure;

[0015] Figure 6 It is a schematic diagram of the positioning key structure;

[0016] Figure 7 It is Figure 6 A-A sectional view.

[0017] In the figure: 1 - vertical plate, 2 - arc plate, 3 - groove, 4 - positioning plate, 5 - positioning strip, 6 - fixed width plate, 7 - movable width plate, 8 - hydraulic cylinder body, 9 - piston rod, 10 - piston hole, 11 - first countersunk screw, 12 - limiting block, 13 - second countersunk screw, 14 - first threaded hole, 15 - clearance groove, 16 - upper circular plate, 17 - lower circular plate, 18 - connecting rod, 19 - circular hole, 20 - second threaded hole. DETAILED DESCRIPTION

[0018] As Figures 1 to 7As shown, a general device for stacking a slant-slot stator core includes a cuboid cylinder composed of four vertical plates 1 arranged along the height direction in the axial direction, the outer side of each of the four vertical plates 1 is fixed with four arc plates 2 whose inner side is a plane and whose outer side is an arc surface, the four arc plates 2 are cross-distributed and the arc surfaces of the four arc plates 2 are arc surfaces in the same circle and their diameter is adapted to the inner diameter of the stator core, the outer side of one of the arc plates 2 is provided with a groove 3 for guiding arranged along the height direction, a positioning key is slidingly installed in the groove 3, the positioning key includes a positioning plate 4 slidingly installed in the groove 3, the outer side of the positioning plate 4 is vertically fixed with a cuboid positioning strip 5 arranged along the height direction, the width of the positioning strip 5 is adapted to (gap fit) the slot width of the stator core.

[0019] In use, according to the inner diameter of the slant-slot stator core to be stacked, the arc plate 2 whose inner diameter is adapted thereto is selected and installed on the outer side of the vertical plate 1, the positioning plate 4 in the positioning key is slidingly installed in the groove 3, the stator lamination is sleeved on the outer side of the four arc plates 2 from the upper part, at the same time, the positioning strip 5 is inserted into one of the slots of the straight-slot stator lamination, then the stator lamination is installed from top to bottom along the oblique direction of the positioning strip 5, all the stator laminations are sequentially installed according to the above method, so that all the stator laminations are obliquely stacked as a whole along the oblique direction of the positioning strip 5, all the stator laminations are installed to form a slant-slot stator core, then the slant-slot stator core and the positioning key are fixed by using a pull rod, an end plate, etc. (how to fix the positioning key and the slant-slot stator core when they are separated belongs to the conventional technical means of those skilled in the art) and are hung to separate from the device.

[0020] In specific implementation, a width plate is further arranged between each vertical plate 1 and the corresponding arc plate 2, the outer side of each width plate is detachably fixedly connected with the corresponding arc plate 2 (a general quick connector such as a pin positioning and matching bolt fastening can be used to achieve detachable fixed connection), among them, two adjacent width plates are fixed width plates 6, and the other two adjacent width plates are movable width plates 7, the inner side of each of the two fixed width plates 6 is fixedly connected with the corresponding vertical plate 1, the inner side of each of the two movable width plates 7 is radially telescopically movably connected with the corresponding vertical plate 1 by using at least two synchronously controlled hydraulic telescopic structures, and the groove 3 for guiding is located on the outer side of the arc plate 2 corresponding to one of the fixed width plates 6. After the stacking of the slant-slot stator core is completed, the two movable width plates 7 are synchronously controlled to shrink, and then the slant-slot stator core is separated, the separation of the stacking device with this structure is more convenient; at the same time, according to the inner diameter of the stator core, the arc plate 2 adapted to the inner diameter of the stator core can be replaced, so that the device becomes a general slant-slot stator core stacking device. In specific implementation, an arc plate 2 can also be sleeved on the outer side of the existing arc plate 2 to increase the thickness of the arc plate 2, so as to satisfy the stacking of stator cores with different diameters and increase the applicability of the general device. In specific implementation, for example, Figure 5As shown, each hydraulic telescopic structure includes a hydraulic cylinder body 8 fixed inside the corresponding upright plate 1 and a piston rod 9, and the corresponding upright plate 1 is provided with a piston hole 10 arranged along the direction perpendicular to the side surface of the upright plate 1, and the piston rod 9 is fixedly connected with the corresponding movable web plate 7 after penetrating through the piston hole 10. In the specific implementation, the movable web plate 7 is threadedly connected with a first countersunk screw 11 arranged along the direction perpendicular to the side surface of the movable web plate 7, and the bottom end of the first countersunk screw 11 is fixedly connected with the outer end of the piston rod 9, so as to realize the fixed connection between the piston rod 9 and the corresponding movable web plate 7.

[0021] In the specific implementation, a ball guide sleeve guide structure for accurately guiding the expansion and contraction of the movable web plate 7 along the direction perpendicular to the side surface of the movable web plate 7 is arranged between the movable web plate 7 and the corresponding upright plate 1, and the ball guide sleeve guide structure includes a ball guide sleeve arranged on the corresponding upright plate 1 of the movable web plate 7 and a guide column fixedly connected with the movable web plate 7 and matched with the ball guide sleeve. If the movable web plate 7 is expanded and contracted by the hydraulic telescopic structure, the guide is not accurate, which can easily cause the corresponding arc plate 2 and other arc plates 2 to be unable to be combined into an ideal whole circle and the axis of the arc plate 2 to be deviated from the axis of the cylinder, resulting in poor positioning accuracy.

[0022] In the specific implementation, as shown in the figure, Figure 4 A pull rod combined limiting structure for limiting the expansion and contraction length of the movable web plate 7 is arranged between the movable web plate 7 and the corresponding upright plate 1, and the pull rod combined limiting structure includes a limiting block 12 arranged inside the corresponding upright plate 1 of the movable web plate 7 and having an expansion and contraction interval with the inner side surface of the corresponding upright plate 1, the limiting block 12 is provided with a first threaded hole 14, and the movable web plate 7 is fixedly connected with the limiting block 12 by screwing the second countersunk screw 13 through the upright plate 1 into the first threaded hole 14, so as to realize the fixed connection between the movable web plate 7 and the limiting block 12. This structure is used to limit the range of expansion and contraction, so as to ensure that the arc surfaces of the four arc plates 2 can indirectly form an ideal whole circle when the stator lamination is installed.

[0023] In the specific implementation, as shown in the figure, Figure 6 Two stop blocks for preventing the stacked stator lamination from moving up and down when being taken out are further included, the stop blocks are provided with through holes, the upper and lower ends of the positioning plate 4 are provided with second threaded holes 20 arranged along the side surface of the positioning plate 4, and the two stop blocks are fixedly connected with the upper and lower parts of the positioning plate 4 by penetrating through the through holes and screwing into the second threaded holes 20, respectively.

[0024] In the specific implementation, as shown in the figure, Figure 7 The positioning strip 5 is provided with a recessed groove 15 to avoid affecting the quality of the stator lamination during stacking and installation. As shown in the figure, Figure 3As shown, the oblique slot core full pressure general equipment further comprises a base for supporting the cylinder, the fixed web plate 6, the movable web plate 7 and the arc plate 2, and the center of the base is provided with a circular hole 19 penetrating the inner cavity of the cylinder. The base comprises an upper circular plate 16 and a lower circular plate 17, and the upper circular plate 16 and the lower circular plate 17 are fixedly connected through a connecting rod 18 vertically arranged between the upper circular plate 16 and the lower circular plate 17. The upper circular plate 16 and the lower circular plate 17 are both provided with a circular hole 19 penetrating the inner cavity of the cylinder and coaxial with the circular hole 19, which facilitates the auxiliary cable and the like to pass out from between the upper circular plate 16 and the lower circular plate 17. The top of the cylinder is provided with a cover plate.

Claims

1. A universal equipment for stacking inclined slot stator cores, characterized in that, The cylinder comprises a cuboid shape consisting of four vertical plates (1) arranged axially along the height direction. Four arc plates (2) with flat inner surfaces and curved outer surfaces are fixed parallel to each of the four vertical plates (1). The four arc plates (2) are arranged in a cross shape, and the curved surfaces of the four arc plates (2) are the same arc surface in the same circle, and their diameters are matched with the inner diameter of the stator core. A guide groove (3) is opened on the outer side of one of the arc plates (2) and is arranged through the height direction. A positioning key is slidably installed in the groove (3). The positioning key includes a positioning plate (4) that slides up and down in the groove (3). A rectangular positioning strip (5) arranged obliquely along the height direction is vertically fixed on the outer side of the positioning plate (4). The width of the positioning strip (5) is adapted to the slot width of the stator core. The positioning strip (5) is provided with a clearance groove (15). A flange is also provided between each vertical plate (1) and the corresponding arc plate (2). The outer side of each flange is detachably fixed to the corresponding arc plate (2). Two adjacent flanges are fixed flanges (6), and two other adjacent flanges are movable flanges (7). The inner side of the two fixed flanges (6) is fixed to the corresponding vertical plate (1). The inner side of the two movable flanges (7) is radially telescopically connected to the corresponding vertical plate (1) by at least two synchronously controlled hydraulic telescopic structures. The guide groove (3) is located on the outer side of the arc plate (2) corresponding to one of the fixed flanges (6). A groove for limiting the movable flange (7) is provided between the movable flange (7) and the corresponding vertical plate (1). 7) The telescopic length of the pull rod combination limiting structure includes a limiting block (12) located inside the vertical plate (1) corresponding to the movable plate (7) and having a telescopic distance with the inner side of the corresponding vertical plate (1). The limiting block (12) has a first threaded hole (14). The movable plate (7) passes through the vertical plate (1) through the second countersunk screw (13) and is screwed into the first threaded hole (14) on the limiting block (12), thereby realizing the fixed connection between the movable plate (7) and the limiting block (12).

2. The universal equipment for stacking inclined slot stator cores according to claim 1, characterized in that, Each hydraulic telescopic structure includes a hydraulic cylinder (8) fixed inside the corresponding vertical plate (1) and a piston rod (9). The corresponding vertical plate (1) has a piston hole (10) arranged in a direction perpendicular to the side of the vertical plate (1). The piston rod (9) passes through the piston hole (10) and is fixedly connected to the corresponding movable plate (7).

3. The universal equipment for stacking inclined slot stator cores according to claim 2, characterized in that, The movable plate (7) is threaded with a first countersunk screw (11) arranged in a direction perpendicular to the side of the movable plate (7). The bottom end of the first countersunk screw (11) is fixedly connected to the outer end of the piston rod (9), thereby realizing the fixed connection between the piston rod (9) and the corresponding movable plate (7).

4. The universal equipment for stacking inclined slot stator cores according to claim 3, characterized in that, A ball bearing guide structure is provided between the movable plate (7) and the corresponding upright plate (1) for precisely guiding the movable plate (7) to extend and retract in a direction perpendicular to the side of the movable plate (7). The ball bearing guide structure includes a ball bearing guide on the upright plate (1) corresponding to the movable plate (7) and a guide post that is fixedly connected to the movable plate (7) and adapted to the ball bearing guide.

5. A universal equipment for stacking inclined slot stator cores according to claim 4, characterized in that, It also includes two stop blocks to prevent the stator laminations from moving up and down during the removal of the die after stacking. The stop blocks are provided with through holes. The upper and lower ends of the positioning plate (4) are provided with second threaded holes (20) arranged vertically along the side of the positioning plate (4). The two stop blocks are fixedly connected to the upper and lower parts of the positioning plate (4) by bolts passing through the through holes and screwing into the second threaded holes (20).

6. The universal equipment for stacking inclined slot stator cores according to claim 5, characterized in that, It also includes a base for supporting the cylinder, the fixed flange (6), the movable flange (7) and the arc plate (2), and the center of the base is provided with a circular hole (19) that communicates with the inner cavity of the cylinder.

7. A universal equipment for stacking inclined slot stator cores according to claim 6, characterized in that, The base includes an upper circular plate (16) and a lower circular plate (17). The upper circular plate (16) and the lower circular plate (17) are fixedly connected by a connecting rod (18) arranged vertically between the upper circular plate (16) and the lower circular plate (17). Both the upper circular plate (16) and the lower circular plate (17) have circular holes (19) that are coaxial with the inner cavity of the cylinder.

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