Stator core press-fitting die tooling

Abstract

The present invention discloses a stator core pressing die tooling, which comprises an outer ring pressing tire (1), a stator core (2), an inner ring pressing tire (3), and a core pressing ring (4), wherein the stator core comprises a limiting boss (21) and a welding portion (22), wherein a plurality of limiting bosses are evenly distributed along the circumference, and a plurality of welding portions are evenly distributed along the circumference; the stator core is installed between the outer ring pressing tire and the inner ring pressing tire, and the upper end surface of the stator core is pressed and connected with the core pressing ring; the outer ring pressing tire comprises a limiting boss positioning groove (11) and a welding window (12); the inner ring pressing tire comprises a first flange (31), a welding space (32), and a keyway (33); and a second welding space (41) is provided on one end surface of the core pressing ring. The present invention is convenient to install and disassemble, has a simple structure, is simple to manufacture, and is reliable in press-fitting and fixing; and the height position of the welding window can be adjusted to adapt to the welding of stator cores with various axial height sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of production and manufacturing tooling for motors, and in particular to a stator core press-fitting die tooling. Background Art

[0002] In motor manufacturing, the stator core is manufactured using a stacking die. Different stator cores require specific die sets for drop-molding, and these die sets are specialized. Traditional stator core stacking dies typically position the stator core on one side, using either the inner or outer ring. For cores requiring skewed slots, slot positioning is also used as an auxiliary method.

[0003] Existing stator cores generally don't specifically restrict circumferential rotation, relying on the tight fit between the core's outer ring and the base's inner ring. However, for highly magnetic permanent magnet motors, this restriction is necessary. Otherwise, the high-speed rotation of the rotor could drive the stator's rotation, causing operational problems. For cores with stator cores that have bosses on the outside of the stampings to limit position and welding points on the outer ring, a separate press-fitting tooling design is required. Summary of the Invention

[0004] The object of the present invention is to overcome the deficiencies in the prior art and provide a stator core press-fitting die fixture that is easy to install and disassemble, has a simple structure, is easy to manufacture, and provides reliable press-fitting and fixing. Furthermore, the height position of the welding window can be adjusted to accommodate the welding of stator cores with various axial height dimensions.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A stator core pressing die tooling comprises an outer ring pressing tire (1), a stator core (2), an inner ring pressing tire (3), and a core pressing ring (4); the stator core comprises a limiting boss (21) and a welding portion (22); a plurality of limiting bosses are evenly distributed along the circumference; and a plurality of welding portions are evenly distributed along the circumference; the stator core is installed between the outer ring pressing tire and the inner ring pressing tire, and the upper end surface of the stator core is pressed and connected with the core pressing ring; the outer ring pressing tire comprises a limiting boss positioning groove (11) and a welding window (12); a plurality of limiting boss positioning grooves are provided on the inner circumference of the outer ring pressing tire and are evenly distributed along the circumference, and the limiting boss positioning grooves correspond to and match the limiting bosses, and a plurality of welding windows penetrate through the inner circumference of the outer ring pressing tire. The inner and outer surfaces of the outer ring pressing tire are evenly distributed along the circumference, and the welding window corresponds to the position of the welding part; the inner ring pressing tire includes a first flange (31), a welding space (32), and a keyway (33); one end of the inner ring pressing tire is provided with a first flange, and the first flange is provided with a first welding space and a keyway, multiple first welding spaces are evenly distributed along the circumference, and the first welding spaces correspond to the position of the welding part, multiple keyways are evenly distributed along the circumference, and the keyways correspond to the positioning grooves of the limiting boss and are positioned by keys; one end face of the core pressing ring is provided with a second welding space (41), multiple second welding spaces are evenly distributed along the circumference, and the second welding spaces correspond to the position of the welding part.

[0007] Furthermore, the upper end face of the stator core (2) abuts against the lower end face of the core pressing ring, and the lower end face of the stator core abuts against the upper end face of the first flange, and the axial height of the first flange is higher than the bottom window edge of the welding window (12) of the outer ring pressing tire on the outer periphery of the stator core; the size of the welding window is larger than the height of the stator core so as to expose all the welding grooves of the stator core without affecting the welding of the stator core.

[0008] Furthermore, the core pressing ring (4) is clearance-matched with the outer ring pressing ring and the inner ring pressing ring, and a second welding space or welding groove (41) is provided at a position on the lower end surface of the core pressing ring that contacts the stator core.

[0009] Furthermore, the outer ring tyre (1) and the inner ring tyre are positioned by means of a positioning key, a keyway (33), and a limiting boss positioning groove (11). A small gap is formed between the outer circumference of the inner ring tyre and the inner circumference of the stator core, and is used for positioning the inner circle of the stator core. The inner circumference of the outer ring tyre is provided with a limiting boss positioning groove (11), which is used for positioning the limiting boss (21) on the outer circumference of the stator core. A large gap is left between the inner circumference of the outer ring tyre and the outer circumference of the stator core. After the stator core is installed in position, it is pressed tightly with a core pressing ring.

[0010] Furthermore, a welding window is provided on the outer peripheral side of the outer ring pressing tire (1). After the stator core is pressed, the stator core is welded through the welding window of the outer ring pressing tire on the outer periphery of the stator core; a first welding space (32) is provided on the outer peripheral surface of the first flange (31) of the inner ring pressing tire at a position in contact with one end of the stator core, and a second welding space (41) is provided on the bottom end surface of one end of the core pressing ring (4) at a position in contact with the other end of the stator core for welding, so as to avoid welding the mold and the stator core together during welding.

[0011] Furthermore, the inner ring mold (3) also includes a second flange (34), which is arranged on the outer peripheral surface of the first flange (31), and one or more adjustment plates / adjustment rings (35) are arranged between the lower end surface of the outer ring mold and the second flange. The axial height of the second flange is less than the axial height of the first flange, and the adjustment plates / adjustment rings are used to adjust the axial height position of the welding window (12) to adapt to the welding of stator cores with various axial height sizes.

[0012] The stator core press-fitting die tooling of the present invention is easy to install and disassemble, has a simple structure, is simple to manufacture, and is reliable in press-fitting and fixing; and can adjust the height position of the welding window to adapt to the welding of stator cores with various axial height sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the stator core structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the stator core press-fitting die of the present invention;

[0015] Figure 3 This is a schematic diagram of the outer ring tire pressing structure of the present invention;

[0016] Figure 4 This is a schematic diagram of the inner ring tire structure of the present invention;

[0017] Figure 5 This is a schematic diagram of the core pressing ring structure of the present invention;

[0018] Figure 6 This is a structural schematic diagram of another embodiment of the stator core press-fitting die tooling of the present invention.

[0019] In the figure: outer ring pressing tire 1, stator core 2, inner ring pressing tire 3, core pressing ring 4, limiting boss positioning groove 11, welding window 12, limiting boss 21, welding part / welding position 22, first flange 31, first welding space / welding groove 32, keyway 33, second flange 34, adjustment plate / ring 35, second welding space / welding groove 41. DETAILED DESCRIPTION

[0020] To make the technical solution and its advantages of the present invention more clear, the technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of the present invention and are only used to explain the present invention, not to limit the present invention. It should be noted that, for ease of description, the accompanying drawings only show the parts / structures related to the present invention. Other related parts can refer to the general design. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0021] All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention. Furthermore, unless otherwise defined, technical or scientific terms used in the description of the present invention shall have the same meanings as those generally understood by persons of ordinary skill in the art to which the present invention belongs.

[0022] The present invention will be described in further detail below with reference to the accompanying drawings.

[0023] like Figure 1-5 As shown, a stator core pressing mold tooling comprises an outer ring pressing tire 1, a stator core 2, an inner ring pressing tire 3, and a core pressing ring 4. The stator core 2 comprises a limiting boss 21 and a welding portion / welding position 22. A plurality of limiting bosses 21 are evenly distributed along the circumferential direction, and a plurality of welding portions 22 are evenly distributed along the circumferential direction. It is characterized in that: the stator core 2 is installed between the outer ring pressing tire 1 and the inner ring pressing tire 3, and the upper end surface of the stator core 2 is pressed and connected with the core pressing ring 4; the outer ring pressing tire 1 comprises a limiting boss positioning groove 11 and a welding window 12. A plurality of limiting boss positioning grooves 11 are provided on the inner circumferential surface of the outer ring pressing tire 1 and are evenly distributed along the circumferential direction, and the limiting boss positioning grooves 11 correspond to and match the limiting bosses 21. A plurality of welding windows 12 pass through the inner circumference of the outer ring pressing tire 1, The outer surface is evenly distributed along the circumference, and the welding window 12 corresponds to the position of the welding part 22; the inner ring tire 3 includes a first flange 31, a welding space 32, and a keyway 33. A first flange 31 is provided at one end of the inner ring tire 3, and a first welding space 32 and a keyway 33 are provided on the first flange 31. A plurality of first welding spaces 32 are evenly distributed along the circumference, and the first welding space 32 corresponds to the position of the welding part 22. A plurality of keyways 33 are evenly distributed along the circumference, and the keyway 33 corresponds to the positioning groove 11 of the limiting boss and is positioned by a key; a second welding space 41 is provided on one end face of the core pressure ring 4, and a plurality of second welding spaces 41 are evenly distributed along the circumference, and the second welding space 41 corresponds to the position of the welding part 22.

[0024] The upper end surface of the stator core 2 abuts against the lower end surface of the core pressing ring 4, and the lower end surface of the stator core 2 abuts against the upper end surface of the first flange 31. The axial height of the first flange 31 is higher than the bottom window edge of the welding window 12 of the outer ring tire 1 on the outer periphery of the stator core 2.

[0025] The size / space of the welding window 12 is larger than the height of the stator core 2 so as to expose all the welding slots of the stator core without affecting the welding of the stator core.

[0026] The core pressing ring 4 is gap-fitted with the outer ring pressing ring 1 and the inner ring pressing ring 3 , and a second welding space / welding groove 41 is provided at the position of the lower end surface of the core pressing ring 4 in contact with the stator core 2 .

[0027] The outer ring tyre 1 and the inner ring tyre 3 are positioned by means of a positioning key (flat key), a keyway 33 and a limiting boss positioning groove 11. A small gap is formed between the outer cylindrical surface of the inner ring tyre 3 and the inner cylindrical surface of the stator core 2, which is used for positioning the inner cylindrical surface of the stator core 2. A limiting boss positioning groove 11 is provided on the inner cylindrical surface of the outer ring tyre 1, which is used for positioning the limiting boss 21 on the outer cylindrical surface of the stator core 2. A large gap is left between the inner cylindrical surface of the outer ring tyre 1 and the outer cylindrical surface of the stator core 2. After the stator core 2 is installed in position, it is tightened with the core pressing ring 4.

[0028] A welding window 12 is provided on the outer circumference of the outer ring pressing ring 1. After the stator core 2 is compressed, the stator core 2 is welded through the welding window 12 of the outer ring pressing ring 1 on the outer circumference of the stator core 2. A first welding space 32 is provided on the outer circumference of the first flange 31 of the inner ring pressing ring 3 (the contact position with the two ends of the stator core 2), and a second welding space 41 is provided on the bottom end surface of one end of the core pressing ring 4 (the contact position with the two ends of the stator core 2). These are used for welding to avoid welding the mold and the stator core together during welding. After welding is completed, the pressure is removed and the tooling mold is dismantled.

[0029] like Figure 6 As shown, in another embodiment, the inner ring rim 3 also includes a second flange 34, and the second flange 34 is arranged on the outer peripheral surface of the first flange 31. One or more adjustment plates / rings 35 are arranged between the lower end surface of the outer ring rim 1 and the second flange 34. The axial height of the second flange 34 is less than the axial height of the first flange 31. The adjustment plates / rings 35 are used to adjust the height position of the welding window 12 (installing different numbers of adjustment plates / rings 35) to adapt to the welding of stator cores 2 with various axial height sizes.

[0030] The stator core press-fitting die tooling of the present invention is easy to install and disassemble, has a simple structure, is simple to manufacture, and is reliable in press-fitting and fixing; and can adjust the height position of the welding window to adapt to the welding of stator cores with various axial height sizes.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The "connection" mentioned above can be a direct connection or an indirect connection, and the "setting", "setting at", and "setting at" can be directly set at or indirectly set at.

[0032] The above-mentioned embodiments are illustrative of the present invention, not limiting thereof. It is understood that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stator core pressing die tooling, comprising an outer ring pressing member (1), a stator core (2), an inner ring pressing member (3), and a core pressing ring (4), wherein the stator core comprises a limiting boss (21) and a welding portion (22), wherein a plurality of limiting bosses are uniformly distributed along the circumferential direction, and a plurality of welding portions are uniformly distributed along the circumferential direction; characterized in that: The stator core is installed between the outer ring pressing tire and the inner ring pressing tire, and the upper end surface of the stator core is pressed and connected with the core pressing ring; the outer ring pressing tire includes a limiting boss positioning groove (11) and a welding window (12), a plurality of limiting boss positioning grooves are provided on the inner circumferential surface of the outer ring pressing tire and are evenly distributed along the circumferential direction, and the limiting boss positioning grooves correspond to the limiting bosses, a plurality of welding windows penetrate the inner and outer surfaces of the outer ring pressing tire and are evenly distributed along the circumferential direction, and the welding windows correspond to the positions of the welding parts; the inner ring pressing tire includes a first flange (31), a first welding space (32) , keyway (33), a first flange is provided at one end of the inner ring pressure tire, a first welding space and a keyway are provided on the first flange, a plurality of first welding spaces are evenly distributed along the circumference, and the first welding space corresponds to the position of the welding portion, a plurality of keyways are evenly distributed along the circumference, and the keyways correspond to the positioning grooves of the limiting boss and are positioned by keys; a second welding space (41) is opened at the position of the lower end surface of the core pressure ring that contacts the stator core, a plurality of second welding spaces are evenly distributed along the circumference, and the second welding spaces correspond to the position of the welding portion.

2. A stator core press-fitting die tooling according to claim 1, characterized in that: The upper end face of the stator core (2) abuts against the lower end face of the core pressing ring, and the lower end face of the stator core abuts against the upper end face of the first flange. The axial height of the first flange is higher than the bottom window edge of the welding window (12) of the outer ring pressing tire on the outer periphery of the stator core. The size of the welding window is larger than the height of the stator core so as to expose all the welding grooves of the stator core without affecting the welding of the stator core.

3. The stator core press-fitting die tooling according to claim 2, characterized in that: The core pressing ring (4) is clearance-matched with the outer ring pressing tire and the inner ring pressing tire.

4. A stator core press-fitting die tooling as claimed in claim 3, characterized in that: The outer ring tyre (1) and the inner ring tyre are positioned by a positioning key, a keyway (33), and a limiting boss positioning groove (11). A small gap is formed between the outer circumference of the inner ring tyre and the inner circumference of the stator core, and is used for positioning the inner circle of the stator core. The inner circumference of the outer ring tyre is provided with a limiting boss positioning groove (11), which is used for positioning the limiting boss (21) on the outer circumference of the stator core. A large gap is left between the inner circumference of the outer ring tyre and the outer circumference of the stator core. After the stator core is installed in position, it is pressed tightly with a core pressing ring.

5. The stator core press-fitting die tooling according to claim 4, characterized in that: The outer circumferential side of the outer ring pressing tire (1) is provided with a welding window. After the stator core is pressed, the stator core is welded through the welding window of the outer ring pressing tire on the outer circumference of the stator core; a first welding space (32) is provided on the outer circumferential surface of the first flange (31) of the inner ring pressing tire at a position in contact with one end of the stator core, and a second welding space (41) is provided on the bottom end surface of one end of the core pressing ring (4) at a position in contact with the other end of the stator core for welding, so as to avoid welding the mold and the stator core together during welding.

6. A stator core press-fitting die tool as claimed in claim 2 or 5, characterized in that: The inner ring embossing (3) further includes a second flange (34), which is arranged on the outer peripheral surface of the first flange (31). One or more adjustment plates / adjustment rings (35) are arranged between the lower end surface of the outer ring embossing and the second flange. The axial height of the second flange is less than the axial height of the first flange. The adjustment plates / adjustment rings are used to adjust the axial height position of the welding window (12) to adapt to the welding of stator cores with various axial height sizes.

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