Iron core block stator punching sheet group

Abstract

The invention belongs to the technical field of motor iron cores, and relates to an iron core block stator punching sheet group, which comprises an upper stator punching sheet, a middle stator punching sheet and a lower stator punching sheet which are laminated in sequence, the upper stator punching sheet and the lower stator punching sheet have the same structure and are both provided with buckling points, and the middle stator punching sheet is provided with through punching sheet holes corresponding to the buckling points; and after the upper stator punching sheet, the middle stator punching sheet and the lower stator punching sheet are mutually overlapped, the buckling points of the upper stator punching sheet and the buckling points of the lower stator punching sheet penetrate through the punching sheet holes of the middle stator punching sheet to be mutually matched. The stator iron core is reasonable and ingenious in structure, can solve the problem that a traditional iron core is serious in arch back, has higher mechanical strength and lamination coefficient on the whole, reduces the overall arch back problem, and can reduce fretting wear, fatigue and looseness of mechanical connection between the punching sheets, so that the reliability and durability of a stator are improved, the efficiency of a product is greatly improved, and the cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of motor core technology and relates to a stator lamination assembly of core blocks. Background Technology

[0002] The stacking principle of the stator core of a traditional motor is as follows: the stator laminations are designed with multiple fastening grooves. During the stacking process, the fastening force generated by the deformation between each fastening point ensures the shape and tolerance dimensions of the stacked core.

[0003] However, this structure has the following problems: during the stacking process, there are few joints of these fasteners, and due to production differences, the stress release of each piece is different when deformation occurs, which leads to deformation at the joint of the laminations, and ultimately causes the stacked iron core to bend and hunch.

[0004] The weak mechanical strength between the snap points results in a low stacking coefficient between the iron cores, which requires the use of more silicon steel sheets to meet the product's performance requirements, thus increasing the cost of the motor. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a stator lamination assembly with iron core blocks. This assembly can effectively increase the constraint relationship between the laminations and reduce the deformation at the lamination joints and the disadvantage of overall bending and hunching.

[0006] According to the technical solution of the present invention: a stator lamination assembly of iron core blocks, characterized in that: it includes an upper stator lamination, a middle stator lamination and a lower stator lamination stacked in sequence, wherein the upper stator lamination and the lower stator lamination have the same structure and are both provided with fastening points, and the middle stator lamination is provided with a through lamination hole at the position corresponding to the fastening point. After the upper stator lamination, middle stator lamination, and lower stator lamination are stacked together, the fastening point of the upper stator lamination and the fastening point of the lower stator lamination pass through the lamination hole of the middle stator lamination and cooperate with each other.

[0007] As a further improvement of the present invention, when the upper stator lamination, the middle stator lamination and the lower stator lamination are stacked together, the lower protrusion of the fastening point of the upper stator lamination passes through the lamination hole and abuts against the lower protrusion of the fastening point of the lower stator lamination; at the same time, the upper protrusion of the fastening point of the lower stator lamination passes through the lamination hole and abuts against the upper protrusion of the fastening point of the upper stator lamination.

[0008] As a further improvement of the present invention, the fastening point includes an upper protrusion and a lower protrusion. The upper protrusion protrudes toward the upper surface of the upper stator lamination or the upper surface of the lower stator lamination, and the lower protrusion protrudes toward the lower surface of the upper stator lamination or the lower surface of the lower stator lamination. The upper protrusion and the lower protrusion are offset along the lamination plane.

[0009] As a further improvement of the present invention, the protrusion directions of the upper protrusion and the lower protrusion are opposite. The bottom surface of the upper protrusion forms a first locking groove, and the upper surface of the lower protrusion forms a second locking groove. When they are stacked together, the first locking groove of the upper protrusion of the upper stator lamination abuts against the first locking groove of the upper protrusion of the lower stator lamination; the second locking groove of the lower protrusion of the upper stator lamination abuts against the second locking groove of the lower protrusion of the lower stator lamination.

[0010] As a further improvement of the present invention, the upper stator lamination, the middle stator lamination, and the lower stator lamination are all located in a block core structure. The upper stator lamination and the lower stator lamination are provided with snap points in the edge area of ​​the block structure, and the middle stator lamination is provided with lamination holes in the corresponding positions.

[0011] As a further improvement of the present invention, the edges of the block structure of the upper stator lamination, the middle stator lamination and the lower stator lamination are provided with mutually cooperating positioning structures, the positioning structures including one or more of the following: arc groove, arc protrusion and rectangular groove.

[0012] The technical advantages of this invention are as follows: The structure of this invention is reasonable and ingenious. After the upper stator lamination, middle stator lamination, and lower stator lamination are stacked together, the fastening points of the upper stator lamination and the fastening points of the lower stator lamination pass through the lamination holes of the middle stator lamination to form an interlocking structure. This achieves multi-point rigid constraint in the stacking direction, which can evenly distribute the bonding force in the stacking direction. This avoids stress concentration caused by uneven local deformation of traditional fastening points, thereby significantly reducing deformation and overall warping (bowing) at the lamination joints and improving the mechanical strength and stacking coefficient of the core. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the structure of the upper stator lamination or the lower stator lamination.

[0015] Figure 3 This is a schematic diagram of the structure of the middle stator lamination.

[0016] Figure 4 This is a schematic diagram showing the fit between the fastener and the punch hole. Detailed Implementation

[0017] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0019] Figures 1-4 The middle stator includes an upper stator lamination 1, a middle stator lamination 2, a lamination hole 21, a lower stator lamination 3, a fastening point 4, an upper protrusion 41, and a lower protrusion 42.

[0020] like Figures 1-4 As shown, the present invention is a stator lamination assembly of iron core blocks, including an upper stator lamination 1, a middle stator lamination 2 and a lower stator lamination 3 stacked in sequence. The upper stator lamination 1 and the lower stator lamination 3 have the same structure and are both provided with fastening points 4. The middle stator lamination 2 is provided with a through lamination hole 21 at the position corresponding to the fastening point 4.

[0021] After the upper stator lamination 1, the middle stator lamination 2, and the lower stator lamination 3 are stacked together, the fastening point of the upper stator lamination 1 and the fastening point of the lower stator lamination 3 pass through the lamination hole 21 of the middle stator lamination 2 and cooperate with each other.

[0022] like Figure 4 As shown, when the upper stator lamination 1, the middle stator lamination 2, and the lower stator lamination 3 are stacked together, the lower protrusion 42 of the fastening point 4 of the upper stator lamination 1 passes through the lamination hole 21 and abuts against the lower protrusion of the fastening point 4 of the lower stator lamination 3; simultaneously, the upper protrusion 41 of the fastening point 4 of the lower stator lamination 3 passes through the lamination hole 21 and abuts against the upper protrusion of the fastening point 4 of the upper stator lamination 1. This structure, in which the protrusions of the upper and lower laminations interlock in the hole of the middle lamination, forms a rigid connection in the stacking direction, effectively constraining the relative displacement between the laminations, which is the key to achieving the high rigidity and anti-warping effect of this invention.

[0023] The buckle 4 includes an upper protrusion 41 and a lower protrusion 42. The protrusion directions of the upper protrusion 41 and the lower protrusion 42 are opposite. The upper protrusion 41 protrudes towards the upper surface of the upper stator lamination 1 or the upper surface of the lower stator lamination 3, and the lower protrusion 42 protrudes towards the lower surface of the upper stator lamination 1 or the lower surface of the lower stator lamination 3. The upper protrusion 41 and the lower protrusion 42 are offset along the lamination plane.

[0024] The bottom surface of the upper protrusion 41 forms a first locking groove, and the upper surface of the lower protrusion 42 forms a second locking groove. When they are stacked together, the first locking groove of the upper protrusion 41 of the upper stator lamination 1 abuts against the first locking groove of the upper protrusion of the lower stator lamination 3; the second locking groove of the lower protrusion 42 of the upper stator lamination 1 abuts against the second locking groove of the lower protrusion of the lower stator lamination 3.

[0025] Furthermore, in practice, the upper protrusion 41 is in the shape of an upwardly protruding isosceles trapezoid, and the lower protrusion 42 is in the shape of a downwardly protruding isosceles trapezoid, and the upper protrusion 41 and the lower protrusion 42 are misaligned with each other.

[0026] The upper stator lamination 1, the middle stator lamination 2, and the lower stator lamination 3 are all part of a block core structure. The upper stator lamination 1 and the lower stator lamination 3 are provided with snap points 4 at the edge area of ​​the block structure, and the middle stator lamination 2 is provided with lamination holes 21 at the corresponding positions.

[0027] The upper stator lamination 1, the middle stator lamination 2, and the lower stator lamination 3 are provided with mutually cooperating positioning structures on their block structure edges. The positioning structures include one or more of the following: arc groove, arc protrusion, and rectangular groove.

[0028] Furthermore, as an embodiment in practice, the upper stator lamination 1, the middle stator lamination 2, and the lower stator lamination 3 are all T-shaped. The upper stator lamination 1 and the lower stator lamination 3 are provided with fastening points 4 on both sides of the horizontal side of the T-shape and the lower part of the vertical side of the T-shape. The middle stator lamination 2 is provided with lamination holes 21 on both sides of the horizontal side of the T-shape and the lower part of the vertical side of the T-shape.

[0029] The upper stator lamination 1, the middle stator lamination 2, and the lower stator lamination 3 have an arc groove at one end and an arc protrusion at the other end along the length of their T-shaped horizontal side. The top of the vertical side of the T-shaped lamination has a rectangular groove, and the bottom of the vertical side of the T-shaped lamination has an arc groove.

[0030] Compared to traditional single stator laminations, this invention combines two stator laminations with staggered locking points and one stator lamination with fully continuous locking points into a single stator lamination. This increases the constraint between the laminations and reduces the disadvantages of deformation at the lamination joints and overall bending. Furthermore, this lamination design gives the stator higher mechanical strength, improving the stacking factor and ultimately providing superior magnetic conductivity, significantly increasing overall assembly efficiency and thus reducing product costs.

[0031] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A stator lamination assembly with iron core blocks, characterized in that: It includes an upper stator lamination (1), a middle stator lamination (2) and a lower stator lamination (3) stacked in sequence. The upper stator lamination (1) and the lower stator lamination (3) have the same structure and are both provided with fastening points (4). The middle stator lamination (2) is provided with a through lamination hole (21) at the position corresponding to the fastening point (4). After the upper stator lamination (1), middle stator lamination (2), and lower stator lamination (3) are stacked together, the fastening point of the upper stator lamination (1) and the fastening point of the lower stator lamination (3) pass through the lamination hole (21) of the middle stator lamination (2) and cooperate with each other.

2. The stator lamination assembly of iron core blocks as described in claim 1, characterized in that: When the upper stator lamination (1), the middle stator lamination (2), and the lower stator lamination (3) are stacked together, the lower protrusion (42) of the buckle point (4) of the upper stator lamination (1) passes through the lamination hole (21) and abuts against the lower protrusion of the buckle point (4) of the lower stator lamination (3); at the same time, the upper protrusion (41) of the buckle point (4) of the lower stator lamination (3) passes through the lamination hole (21) and abuts against the upper protrusion of the buckle point (4) of the upper stator lamination (1).

3. The stator lamination assembly of iron core blocks as described in claim 1, characterized in that: The fastening point (4) includes an upper protrusion (41) and a lower protrusion (42). The upper protrusion (41) protrudes towards the upper surface of the upper stator lamination (1) or the upper surface of the lower stator lamination (3), and the lower protrusion (42) protrudes towards the lower surface of the upper stator lamination (1) or the lower surface of the lower stator lamination (3). The upper protrusion (41) and the lower protrusion (42) are offset along the lamination plane.

4. The stator lamination assembly of iron core blocks as described in claim 3, characterized in that: The upper protrusion (41) and the lower protrusion (42) have opposite protrusion directions. The bottom surface of the upper protrusion (41) forms a first locking groove, and the upper surface of the lower protrusion (42) forms a second locking groove. When they are stacked together, the first locking groove of the upper protrusion (41) of the upper stator lamination (1) abuts against the first locking groove of the upper protrusion of the lower stator lamination (3); the second locking groove of the lower protrusion (42) of the upper stator lamination (1) abuts against the second locking groove of the lower protrusion of the lower stator lamination (3).

5. The stator lamination assembly of iron core blocks as described in claim 1, characterized in that: The upper stator lamination (1), middle stator lamination (2), and lower stator lamination (3) are all part of a block core structure. The upper stator lamination (1) and the lower stator lamination (3) are provided with snap points (4) at the edge area of ​​the block structure, and the middle stator lamination (2) is provided with lamination holes (21) at the corresponding positions.

6. The stator lamination assembly of iron core blocks as described in claim 5, characterized in that: The upper stator lamination (1), the middle stator lamination (2) and the lower stator lamination (3) are provided with mutually cooperating positioning structures at their block structure edges. The positioning structures include one or more of the following: arc groove, arc protrusion and rectangular groove.

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