A motor stator core compacting device

Abstract

The utility model discloses a motor stator core compaction device, including base and setting the pressing plate of stator core piece on the top of base can resist pressure, base is provided with first limit piece on the supporting surface, first limit piece forms the first limit surface of can with the rotor accommodating cavity wall surface cooperation on stator core piece on the outside, first limit piece sets up second limit piece on first limit surface, second limit piece forms the second limit surface of can with the winding slot inner wall surface cooperation on stator core piece on the outside, the pressing plate is provided with the avoidance groove on the pressure surface, and when the pressing plate presses stator core piece, the top of first limit piece and second limit can extend into the avoidance groove, the utility model discloses can be positioned to stator core piece, make stator core piece mutually align, and the winding groove on stator core piece mutually aligns to improve product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of motor stator core compaction equipment, and in particular to a motor stator core compaction device. Background Technology

[0002] The stator core is an important component of the motor's magnetic circuit. Together with the rotor and stator cores, and the air gap between the stator and rotor, it forms the complete magnetic circuit of the motor.

[0003] The stator core contains a rotor housing cavity to accommodate the rotor, and multiple winding slots arranged around the rotor housing cavity, with the slot openings connecting to the rotor housing cavity. The stator core is formed by stacking multiple stator core sheets and then pressing them together using a press. Each stator core sheet is a silicon steel sheet. Currently, stator core sheets are generally stacked manually. Due to the lack of positioning for the stator core sheets, the stator core sheets may shift in position and become difficult to align vertically. This results in unevenness on the outer surface of the compacted stator core and unevenness on the inner walls of the winding slots, affecting product quality. Utility Model Content

[0004] The purpose of this invention is to provide a motor stator core compaction device that can limit the stator core chips, align the stator core chips with each other, and align the winding slots on the stator core chips with each other, thereby improving product quality.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A motor stator core compaction device includes a base and a pressure plate disposed above the base to press against stator core ferrules.

[0007] The base is provided with a first limiting member on the support surface. The first limiting member has a first limiting surface on its outer side that can cooperate with the rotor receiving cavity wall surface on the stator iron chip.

[0008] The first limiting member has a second limiting member provided on the first limiting surface. The second limiting member has a second limiting surface formed on its outer side that can cooperate with the inner wall surface of the winding slot on the stator iron chip.

[0009] The pressure plate has a relief groove on the pressing surface. When the pressure plate presses against the stator iron chip, the top of the first limiting member and the second limiting member can extend into the relief groove.

[0010] Based on the above technical solution, the present invention can be improved as follows:

[0011] Furthermore, the first limiting member is a limiting post, the bottom of which is fixedly connected to the support surface of the base, and the outer side of the limiting post is the first limiting surface.

[0012] Furthermore, the first limiting member includes at least two arc-shaped limiting plates that can be spliced ​​together to form a limiting tube, the bottom of the arc-shaped limiting plate is movably connected to the base, and the arc-shaped outer surface of the limiting plate is the first limiting surface;

[0013] The pressure plate has a pin on the top wall of the clearance groove. The pin can be inserted into the limiting tube when the pressure plate presses against the stator iron chip, driving the arc-shaped limiting plate to slide relative to the base on the support surface, so that the arc-shaped outer side of the arc-shaped limiting plate matches the rotor receiving cavity wall on the stator iron chip.

[0014] Furthermore, the diameter of the pin is larger than the inner diameter of the limiting tube.

[0015] Furthermore, the pin has a wedge-shaped portion at its bottom end, and the wedge-shaped portion has a wedge-shaped surface on its periphery. When the pin is inserted, the wedge-shaped surface causes the arc-shaped limiting plate to slide on the support surface in a direction away from the center of the limiting tube.

[0016] Furthermore, the bottom of the arc-shaped limiting plate is provided with a connecting part; the base has at least two guide grooves on the supporting surface, and the guide grooves are evenly distributed around the center of the base. Through the sliding cooperation between the connecting part on the arc-shaped limiting plate and the guide grooves, the arc-shaped limiting plate can move relative to the base on the supporting surface along the guide grooves.

[0017] Furthermore, an elastic element is provided inside the guide groove. The elastic element provides elastic force to the connecting part of the arc-shaped limiting plate, so that the arc-shaped limiting plate tends to slide along the guide groove from the first position to the second position, and the arc-shaped limiting plates can be spliced ​​together at the second position to form a limiting tube.

[0018] Furthermore, the guide groove forms an installation opening on the side of the base at one end away from the center of the base, and the base is provided with a cover at the installation opening.

[0019] Furthermore, the elastic element is a spring, with one end of the spring abutting against the connecting part of the arc-shaped limiting plate and the other end of the spring abutting against the cover.

[0020] Furthermore, the second limiting member is a vertically arranged elongated flange, and the two opposite outer surfaces of the elongated flange are the second limiting surfaces.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] This invention features a first limiting member on the base, with a first limiting surface that engages with the rotor receiving cavity wall of the stator core to limit the stator core's position, ensuring vertical alignment of the stacked stator cores. Simultaneously, a second limiting member with a second limiting surface engages with the inner wall of the winding slots on the stator core to limit the winding slots, ensuring vertical alignment of the stacked stator cores. This results in a smooth and flush outer surface and smooth inner walls of the winding slots after compaction, thus improving product quality. Attached Figure Description

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 This is a schematic diagram of the motor stator core compaction device installed on a press in Example 1.

[0025] Figure 2 This is a disassembly and assembly diagram of the motor stator core compaction device in Example 1;

[0026] Figure 3 This is a schematic diagram of the stator core lamination structure;

[0027] Figure 4 This is a schematic diagram of the base structure in Embodiment 1;

[0028] Figure 5 This is a schematic diagram of the pressure plate structure in Example 1;

[0029] Figure 6 This is a disassembly and assembly diagram of the motor stator core compaction device in Example 2;

[0030] Figure 7 This is a schematic diagram of the arc-shaped limiting plate structure in Example 2;

[0031] Figure 8 This is a schematic diagram of the base structure in Example 2;

[0032] Figure 9 This is a schematic diagram of the cover structure in Embodiment 2;

[0033] Figure 10 This is a schematic diagram of the pressure plate structure in Example 2;

[0034] Figure 11 This is a schematic diagram of the pressure plate in Example 2 being lowered to compact the stator iron chip.

[0035] The markings on the attached diagram are: 1-base, 2-pressure plate, 3-avoidance groove, 4-limiting post, 5-long strip flange, 6-arc-shaped limiting plate, 7-guide groove, 8-pin, 9-stop cover, 10-spring, 11-wedge surface, 12-stator iron chip, 13-machine base, 14-pressure head. Detailed Implementation

[0036] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. These descriptions are intended to aid in understanding the utility model but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other. Example 1

[0037] See Figures 1 to 5 This embodiment relates to a motor stator core compaction device, including a base 1 and a liftable pressure plate 2 disposed above the base 1. In use, the base 1 is fixedly installed on the machine base 13 of a press, and the pressure plate 2 is fixedly connected to the press head 14 of the press. The pressure plate 2 can move vertically up and down with the press head. Multiple stator core chips 12 are stacked vertically on the base 1, and the pressure plate 2 is driven down by the press head to compact and form the stator core. The press is a vertical press in the prior art. The motor stator core compaction device in this embodiment can be applied to any vertical press in the prior art. Those skilled in the art can select the appropriate one according to actual needs. The specific structure of the vertical press is not an improvement point of this application and will not be described in detail here.

[0038] When compaction is performed, the top of the base 1 contacts the stator iron chip 12 located at the bottom, and the top surface of the base 1 is the support surface. The bottom of the pressure plate 2 contacts the stator iron chip 12 located at the top, and the bottom surface of the pressure plate 2 is the pressing surface.

[0039] The base 1 is provided with a first limiting member on the support surface. The first limiting member has a first limiting surface on the outer side. The first limiting surface can cooperate with the rotor receiving cavity wall on the stator iron chip 12 to limit the stator iron chip 12, so that the stacked stator iron chips 12 can be aligned with each other in the vertical direction.

[0040] The first limiting member has a second limiting member on the first limiting surface. The second limiting member has a second limiting surface on the outer side. The second limiting surface can cooperate with the inner wall surface of the winding slot on the stator iron chip 12 to limit the winding slot on the stator iron chip 12, so that the winding slots on the stacked stator iron chip 12 can be aligned with each other in the vertical direction.

[0041] The pressure plate 2 has a relief groove 3 on the pressing surface to form a relief space in which the top of the first limiting member and the second limiting member can extend into the pressure plate 2 when the pressure plate 2 presses against the stator iron chip 12.

[0042] Specifically, the base 1 is a rectangular base structure. Depending on the actual needs, other shapes of base structures, such as circular or square, can be used instead. The first limiting member is set at the center of the base 1. The base 1 is installed on the machine table of the press by bolts, and corresponding bolt holes are opened on the base 1.

[0043] The first limiting component is a limiting post 4, which is a cylindrical column structure with a smooth outer surface. The bottom of the limiting post 4 is fixedly connected to the support surface of the base 1. The stator chip 12 can be fitted onto the limiting post 4 from the top. When the stator chip 12 is fitted onto the limiting post 4, the circular outer surface of the limiting post 4 is in contact with the rotor receiving cavity wall on the stator chip 12 to limit the stator chip 12, so that multiple stator chips 12 can be aligned with each other in the vertical direction. At this time, the outer surface of the limiting post 4 is the first limiting surface.

[0044] The second limiting component is a vertically arranged elongated flange 5. The elongated flange 5 extends radially away from the center of the limiting post 4 from the outer side of the limiting post 4. The height of the elongated flange 5 is the same as the height of the limiting post 4, and the thickness of the elongated flange 5 corresponds to the width of the winding slot on the stator core. When the stator core 12 is fitted onto the limiting post 4, the outer side of the elongated flange 5 fits against the inner wall of the winding slot on the stator core 12 to limit the winding slot on the stator core 12, so that the winding slots on multiple stator cores 12 can be aligned with each other in the vertical direction. At this time, the outer side of the elongated flange 5 is the second limiting surface.

[0045] The clearance groove 3 on the pressure plate 2 is a circular groove structure. The radius of the clearance groove 3 is greater than the distance between the far end of the elongated flange 5 and the center of the limiting post 4, so as to ensure that the limiting post 4 and the elongated flange 5 can extend into the clearance groove 3 when the pressure plate 2 presses against the stator core 12. The depth of the clearance groove 3 is set according to the length of the limiting post 4 and the elongated flange 5 extending out of the top of the stator core. Example 2

[0046] See Figures 6 to 11Compared with the technical solution of Embodiment 1, the difference in Embodiment 2 is that the first limiting member in this embodiment includes at least two arc-shaped limiting plates 6, which are evenly distributed around the center of the base 1. The arc-shaped limiting plates 6 have an arc-shaped outer surface and an arc-shaped inner surface. A connecting part is provided at the bottom of the arc-shaped limiting plate 6. At least two guide grooves 7 are provided on the support surface of the base 1, which are evenly distributed around the center of the base 1. The arc-shaped limiting plate 6 can slide relative to the base 1 along the guide grooves 7 through the sliding cooperation between the connecting part on the arc-shaped limiting plate 6 and the guide grooves 7. An elastic member is provided inside the guide groove 7, and the elastic member moves along the arc-shaped limiting plate 6. The connecting part provides elasticity so that the arc-shaped limiting plate 6 tends to slide along the guide groove 7 from the first position to the second position, and the arc-shaped limiting plate 6 can be spliced ​​together at the second position to form a limiting tube; the outer diameter of the limiting tube formed by splicing is smaller than the diameter of the rotor receiving cavity of the stator iron chip 12, so that a gap is formed between the arc-shaped outer side of the arc-shaped limiting plate 6 and the rotor receiving cavity wall on the stator iron chip 12, so that the stator iron chip 12 can be quickly sleeved on the limiting tube for pre-limiting, while avoiding the rotor receiving cavity wall on the stator iron chip 12 from rubbing against each other and forming scratches during the sleeve process, thereby improving product quality.

[0047] The pressure plate 2 has a pin 8 at the center of the top wall of the clearance groove 3. The diameter of the pin 8 is larger than the inner diameter of the spliced ​​limiting tube. The pin 8 can be inserted into the limiting tube as the pressure plate 2 descends, and drive the arc-shaped limiting plate 6 to slide along the guide groove 7 from the second position to the first position, so that the arc-shaped outer side of the arc-shaped limiting plate 6 is in contact with the rotor receiving cavity wall on the stator iron chip 12, so as to precisely limit the stator iron chip 12, so that multiple stator iron chips 12 can be aligned with each other in the vertical direction. At this time, the arc-shaped outer side of the arc-shaped limiting plate 6 is the first limiting surface.

[0048] In this embodiment, the guide groove 7 is an elongated groove with a "convex" cross-section. The first position is the end of the guide groove 7 away from the center of the base 1, and the second position is the end of the guide groove 7 close to the center of the base 1. The guide groove 7 forms an installation opening on the side of the base 1 at the end away from the center of the base 1, so that the connecting part on the arc-shaped limiting plate 6 can be assembled into the guide groove 7 from the installation opening. The base 1 is provided with a cover 9 at the installation opening, so that the installation opening can be closed after the arc-shaped limiting plate 6 is assembled into the guide groove 7, and the cover 9 can be locked with bolts at the same time.

[0049] In this embodiment, the connecting part of the arc-shaped limiting plate 6 is a block with a "convex" shaped cross section; in this embodiment, the elastic element is a spring 10, one end of the spring 10 abuts against the connecting part of the arc-shaped limiting plate 6, and the other end of the spring 10 abuts against the cover 9; both the cover 9 and the connecting part of the arc-shaped limiting plate 6 are provided with spring fixing holes for embedding the end of the spring 10.

[0050] During non-compaction operation, the arc-shaped limiting plate 6 is located in the second position, and the spring 10 is in the extended state. During the compaction operation, the outer side of the pin 8 is in contact with the arc-shaped inner side of the arc-shaped limiting plate 6 to form a driving force on the inner side of the arc-shaped limiting plate 6, causing the arc-shaped limiting plate 6 to slide from the second position to the first position, and the spring 10 is compressed accordingly. When the compaction operation is completed, the pin 8 rises, and the outer side of the pin 8 separates from the arc-shaped inner side of the arc-shaped limiting plate 6 to remove the driving force on the inner side of the arc-shaped limiting plate 6. Under the elastic force of the spring 10, the arc-shaped limiting plate 6 returns to its initial position.

[0051] The pin 8 has a wedge-shaped part at its bottom end, and a wedge-shaped surface 11 is formed on the periphery of the wedge-shaped part. When the pin 8 follows the pressure plate 2 down and is inserted into the spliced ​​limiting tube, the top inner side of the arc-shaped limiting plate 6 contacts the wedge-shaped surface 11 of the wedge-shaped part, and a horizontal force parallel to the base 1 is formed at the contact point. This causes the insertion movement of the pin 8 to drive the arc-shaped limiting plate 6 to slide along the guide groove 7 from the second position to the first position, that is, to drive the arc-shaped limiting plate 6 to slide on the support surface in a direction away from the center of the limiting tube.

[0052] In this embodiment, the second limiting component is a long strip flange 5 disposed on the arc-shaped limiting plate 6. The long strip flange 5 is vertically disposed and extends radially from the outer side of the arc-shaped limiting plate 6. The height of the long strip flange 5 is the same as the height of the arc-shaped limiting plate 6, and the thickness of the long strip flange 5 corresponds to the width of the winding slot on the stator core. When the stator core chip 12 is fitted onto the limiting tube formed by splicing, the outer side of the long strip flange 5 is in contact with the inner wall of the winding slot on the stator core chip 12 to limit the winding slot on the stator core chip 12, so that the winding slots on multiple stator core chips 12 can be aligned with each other in the vertical direction. At this time, the two opposite outer sides of the long strip flange 5 are the second limiting surfaces.

[0053] Compared to the technical solution of Embodiment 1, in Embodiment 2, at least two arc-shaped limiting plates 6 are set. The arc-shaped limiting plates 6 can move on the base 1 and splice to form a limiting tube. The limiting tube can pre-limit the stator core 12. Then, by inserting a pin 8 into the limiting tube, the arc-shaped limiting plates 6 can be driven to precisely limit the stator core 12. The winding grooves on the stator core 12 and the positioning core can be further aligned, making the surface of the compacted stator core more flush and smooth. The inner wall of the winding groove on the stator core is flush and smooth, thereby improving product quality.

[0054] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A motor stator core compaction device, comprising a base and a pressure plate disposed above the base for pressing against stator core ferrules; characterized in that, The base is provided with a first limiting member on the support surface. The first limiting member has a first limiting surface on its outer side that can cooperate with the rotor receiving cavity wall surface on the stator iron chip. The first limiting member has a second limiting member provided on the first limiting surface. The second limiting member has a second limiting surface formed on its outer side that can cooperate with the inner wall surface of the winding slot on the stator iron chip. The pressure plate has a relief groove on the pressing surface. When the pressure plate presses against the stator iron chip, the tops of the first limiting member and the second limiting member can extend into the relief groove.

2. The motor stator core compaction device according to claim 1, characterized in that, The first limiting member is a limiting post, the bottom of which is fixedly connected to the support surface of the base, and the outer side of the limiting post is the first limiting surface.

3. The motor stator core compaction device according to claim 1, characterized in that, The first limiting member includes at least two arc-shaped limiting plates that can be spliced ​​together to form a limiting tube. The bottom of the arc-shaped limiting plate is movably connected to the base, and the arc-shaped outer surface of the limiting plate is the first limiting surface. The pressure plate has a pin on the top wall of the clearance groove. The pin can be inserted into the limiting tube when the pressure plate presses against the stator iron chip, driving the arc-shaped limiting plate to slide relative to the base on the support surface, so that the arc-shaped outer side of the arc-shaped limiting plate matches the rotor receiving cavity wall on the stator iron chip.

4. The motor stator core compaction device according to claim 3, characterized in that, The diameter of the pin is larger than the inner diameter of the limiting tube.

5. The motor stator core compaction device according to claim 4, characterized in that, The pin has a wedge-shaped part at its bottom end, and the wedge-shaped part has a wedge-shaped surface on its periphery. When the pin is inserted, the wedge-shaped surface causes the arc-shaped limiting plate to slide on the support surface in a direction away from the center of the limiting tube.

6. The motor stator core compaction device according to claim 3, characterized in that, The bottom of the arc-shaped limiting plate is provided with a connecting part; the base has at least two guide grooves on the supporting surface, and the guide grooves are evenly distributed around the center of the base. The arc-shaped limiting plate can move relative to the base on the supporting surface along the guide grooves by sliding cooperation between the connecting part and the guide grooves.

7. The motor stator core compaction device according to claim 6, characterized in that, An elastic element is provided inside the guide groove. The elastic element provides elastic force to the connecting part of the arc-shaped limiting plate, so that the arc-shaped limiting plate tends to slide along the guide groove from the first position to the second position, and the arc-shaped limiting plates can be spliced ​​together at the second position to form a limiting tube.

8. The motor stator core compaction device according to claim 7, characterized in that, The guide groove forms an installation opening on the side of the base at one end away from the center of the base, and the base is provided with a cover at the installation opening.

9. The motor stator core compaction device according to claim 8, characterized in that, The elastic element is a spring, with one end of the spring abutting against the connecting part of the arc-shaped limiting plate and the other end of the spring abutting against the cover.

10. The motor stator core compaction device according to claim 2 or 3, characterized in that, The second limiting member is a vertically arranged elongated flange, and the two opposite outer surfaces of the elongated flange are the second limiting surfaces.

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