Anti-drop type positioning core for flat commutator

Abstract

The utility model discloses a planar commutator anti-dropout type sheet arrangement positioning core, characterized in that it comprises a positioning plate whose outer diameter matches the outer diameter of the planar commutator to be arranged, an intermediate truncated cone and a peripheral truncated cone are arranged on the upper end face of the positioning plate, a positioning hole is arranged at the center of the intermediate truncated cone, a plurality of circumferentially evenly arranged yielding grooves are arranged on the circumference of the outer circumferential surface of the intermediate truncated cone, each yielding groove has an upper opening at the groove end, the peripheral truncated cones are arranged circumferentially with the center of the intermediate truncated cone as the center, and the height of the peripheral truncated cones is less than the height of the intermediate truncated cone. The utility model is used for the arrangement of commutation copper sheets and mica sheets in the process of manufacturing a planar commutator, saves the use of rubber rings, prevents the commutation copper sheets from being easily dropped out, improves work efficiency, and reduces the labor intensity of workers.

Description

Technical Field

[0001] The utility model relates to a positioning core for arranging commutation copper sheets and mica sheets in the production process of a planar commutator. Background Art

[0002] In the production process of the flat commutator, the commutation copper sheet and mica sheet of the flat commutator need to be arranged first to form a circularly arranged sheet as a whole, and then tightened with a rubber ring, and then the sheet as a whole is placed in the mold cavity of the compression mold, and the commutator product is pressed and formed together with the bakelite powder. The disadvantages are: the sheet as a whole needs to be tightened with a rubber ring, which wastes the use of the rubber ring, and because the height of the commutation copper sheet and mica sheet of the flat commutator is very short, the commutation copper sheet is still easy to fall out after being tightened with the rubber ring, especially when the sheet as a whole tightened with the rubber ring is placed from top to bottom into the mold cavity of the compression mold, the rubber ring needs to be removed, and because the gap between the outer diameter of the sheet as a whole and the inner hole size of the mold cavity is very small, the sheet as a whole needs to be gently tapped to make the sheet as a whole enter the mold cavity, which is more likely to cause the commutation copper sheet to fall out, thereby greatly reducing the work efficiency and the labor intensity of the workers. Summary of the invention

[0003] In view of the problems existing in the prior art, the purpose of the utility model is to provide a planar commutator anti-slip sheet arrangement and positioning core for arranging commutating copper sheets and mica sheets in the process of manufacturing a planar commutator, which saves the use of rubber rings and prevents the commutating copper sheets from easily falling out, thereby improving work efficiency and reducing the labor intensity of workers.

[0004] The utility model is completed by adopting the following technical solutions:

[0005] The anti-dropping type sheet arrangement and positioning core of a flat commutator is characterized in that it includes a positioning plate whose outer diameter matches the outer diameter of the sheet arrangement flat commutator, an intermediate frustum and a peripheral frustum are arranged on the upper end face of the positioning plate, a positioning hole is arranged at the center of the intermediate frustum, a plurality of circumferentially distributed yielding grooves are arranged on the circumference of the outer surface of the intermediate frustum, each yielding groove has an upper opening at the end of the groove, the peripheral frustum is arranged circumferentially with the center of the intermediate frustum as the center, and the height of the peripheral frustum is less than the height of the intermediate frustum.

[0006] After adopting the above technical solution, when arranging the sheets, the commutating copper sheet and the mica sheet of the planar commutator are placed on the positioning plate. When placing the commutating copper sheet, align the hook foot of the commutating copper sheet with the clearance groove, so that the hook foot of the commutating copper sheet falls into the clearance groove, and align the semi-dovetail groove on the lower end surface of the commutating copper sheet with the peripheral truncated cone, so that the inner circle of the peripheral truncated cone abuts against the inner groove surface of the semi-dovetail groove of the commutating copper sheet. At this time, the shoulders of the commutating copper sheet on both sides of the hook foot will abut against the outer circle of the middle truncated cone, so that the commutating copper sheet is radially positioned. When placing the mica sheet, align the half dovetail groove on the lower end of the mica sheet with the peripheral truncated cone, and the inner circle of the peripheral truncated cone against the inner groove surface of the half dovetail groove of the mica sheet. At this time, the inner side of the mica sheet is against the outer circle of the middle truncated cone, so that the mica sheet is radially positioned; when the sheet arrangement is completed, the reversing copper sheet and the mica sheet form a circularly neatly arranged sheet arrangement on the positioning disk. Since the reversing copper sheet and the mica sheet have been reliably radially positioned, there is no need to tighten them with rubber rings, saving the use of rubber rings. Next, align the mold cavity of the compression mold with the sheet arrangement as a whole, knock the compression mold to allow the mold cavity of the compression mold to enter the sheet arrangement as a whole on the positioning disk from top to bottom, so that the sheet arrangement as a whole enters the mold cavity. When the entire sheet arrangement enters the mold cavity and is in close contact with the inner wall of the mold cavity, finally remove the positioning disk. The entire process will not cause the reversing copper sheet to fall out, which not only improves work efficiency but also reduces the labor intensity of workers.

[0007] As a preferred technical solution: the positioning plate, the middle frustum and the peripheral frustum are an integrated structure.

[0008] As a preferred technical solution: the positioning plate, the middle frustum and the peripheral frustum are an integral injection-molded structure.

[0009] As a preferred technical solution: a countersunk hole is provided on the lower end surface of the positioning plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model has the following drawings:

[0011] Figure 1 This is an upper end view of the utility model;

[0012] Figure 2 for Figure 1 AA view,

[0013] Figure 3 It is a schematic diagram of the utility model when performing the planar commutator slice arrangement work. DETAILED DESCRIPTION

[0014] like Figure 1-2As shown, the utility model of the anti-slip type sheet arrangement positioning core of the planar commutator comprises a positioning plate 1 whose outer diameter matches the outer diameter of the sheet arrangement planar commutator, a countersunk hole 6 is arranged on the lower end face of the positioning plate 1, an intermediate truncated cone 3 and a peripheral truncated cone 2 are arranged on the upper end face of the positioning plate 1, the positioning plate 1, the intermediate truncated cone 3 and the peripheral truncated cone 2 are an integral injection molding structure, a positioning hole 5 is arranged at the center of the intermediate truncated cone 3, a plurality of clearance grooves 4 are evenly distributed on the circumference of the outer circumferential surface of the intermediate truncated cone 3, each clearance groove 4 has an upper opening at the groove end, the peripheral truncated cone 2 is arranged circumferentially with the center of the intermediate truncated cone 3 as the center, and the height of the peripheral truncated cone 2 is less than the height of the intermediate truncated cone 3.

[0015] like Figure 3 As shown, during the sheet arrangement, the commutating copper sheet M and the mica sheet N of the planar commutator are placed on the positioning disk 1, the hook foot M1 of the commutating copper sheet falls into the giving way groove 4, the inner circle of the peripheral truncated cone 2 abuts against the inner groove surface of the semi-dovetail groove M2 of the commutating copper sheet, the shoulders M3 of the commutating copper sheet M located on both sides of the hook foot M1 abut against the outer circle of the middle truncated cone 2, the commutating copper sheet M is radially positioned, the inner circle of the peripheral truncated cone 2 abuts against the inner groove surface of the semi-dovetail groove N1 of the mica sheet, the inner side surface N2 of the mica sheet N abuts against the outer circle of the middle truncated cone 3, the mica sheet N is radially positioned; when the sheet arrangement is completed, the commutating copper sheet M and the mica sheet N form a sheet arrangement that is neatly arranged in a circle on the positioning disk 1. Since the commutating copper sheet and the mica sheet have been reliably radially positioned, there is no need to tighten them with rubber rings, which saves the use of rubber rings.

Claims

1. Anti-dropping type sheet positioning core for flat commutator, characterized by: It includes a positioning plate with an outer diameter matching the outer diameter of the plane commutator of the arranged segments, an intermediate truncated cone and a peripheral truncated cone are arranged on the upper end face of the positioning plate, a positioning hole is arranged at the center of the intermediate truncated cone, a plurality of circumferentially arranged yielding grooves are arranged on the circumference of the outer surface of the intermediate truncated cone, each yielding groove has an upper opening at the groove end, and the peripheral truncated cones are arranged circumferentially with the center of the intermediate truncated cone as the center, and the height of the peripheral truncated cone is less than the height of the intermediate truncated cone.

2. The anti-dropout type sheet arrangement and positioning core for a planar commutator according to claim 1, characterized in that: The positioning plate, the middle truncated cone and the peripheral truncated cone are an integrated structure.

3. The anti-dropout type sheet arrangement and positioning core for a planar commutator according to claim 2, characterized in that: The positioning plate, the middle truncated cone and the peripheral truncated cone are an integral injection-molded structure.

4. The anti-dropout type sheet arrangement and positioning core for a planar commutator according to claim 1, 2 or 3, characterized in that: The lower end surface of the positioning plate is provided with a countersunk hole.

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