Commutator segment feeding tool of plane commutator

Abstract

The commutator segment feeding tool is characterized in that the commutator segment feeding tool comprises a bottom mold plate, a middle mold plate and a compression molding mold plate, the middle mold plate can move up and down and is elastically connected to the bottom mold plate, the middle mold plate is provided with a plurality of segment arrangement cavities, each segment arrangement cavity is internally provided with a positioning rod, the positioning rods are used for positioning segment arrangement positioning cores, and the compression molding mold plate is provided with a plurality of compression molding grooves. The positioning rod is fixed on the bottom template, the compression molding mold plate is independently arranged, and the compression molding mold plate is provided with injection molding mold cavities which are in one-to-one correspondence with the sheet arranging cavities; after the sheet arrangement positioning core is placed in the sheet arrangement cavity and is positioned by the positioning rod, the height of the top of the whole sheet arrangement of the commutation copper sheets and the mica sheets of the plane commutator on the sheet arrangement positioning core is larger than the height of the upper end face of the middle template. The feeding device is used for feeding the commutation copper sheets of the plane commutator during sheet arrangement and before injection molding, the commutation copper sheets are prevented from being scattered, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a commutation copper sheet feeding tool used for producing 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 neatly arranged sheet, and then tightened with a rubber ring, and then the sheet is placed in the mold cavity of the compression mold plate, and the flat commutator product is pressed and formed together with the bakelite powder. The disadvantages are: the sheet 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 is tightened with the rubber ring and placed from top to bottom into the injection mold cavity of the compression mold plate, the rubber ring needs to be removed, and because the gap between the outer diameter of the sheet and the inner hole size of the injection mold cavity is very small, the sheet needs to be gently tapped to make the sheet enter the mold cavity, which makes it easier to cause the commutation copper sheet to fall out and become scattered, 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 commutator segment loading tooling for a planar commutator, which is used for loading the commutator copper segments of the planar commutator before injection molding during segment arrangement, thereby preventing the commutator copper segments from being scattered and improving work efficiency.

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

[0005] The commutator segment loading tooling of the planar commutator is characterized in that it includes a bottom template, a middle template and a compression mold plate, the middle template can move up and down and is elastically connected to the bottom template, a plurality of sheet arrangement cavities are arranged on the middle template, a positioning rod is arranged in each sheet arrangement cavity, the positioning rod is used to position the sheet arrangement positioning core, the positioning rod is fixed on the bottom template, the compression mold plate is independently arranged, and the compression mold plate is provided with injection mold cavities corresponding to the sheet arrangement cavities one by one; when the sheet arrangement positioning core is placed in the sheet arrangement cavity and positioned by the positioning rod, the overall top height of the sheet arrangement of the commutator copper sheet and mica sheet of the planar commutator is completed on the sheet arrangement positioning core is greater than the upper end surface height of the middle template.

[0006] The sheet arrangement positioning core includes a positioning plate with an outer diameter matching the overall outer diameter of the sheet arrangement; an intermediate cone and a peripheral cone are provided on the upper end face of the positioning plate; a positioning hole for positioning the positioning rod is provided at the center of the intermediate cone; a plurality of positioning grooves are evenly distributed on the circumference of the outer surface of the intermediate cone; each positioning groove has an upper opening at the groove end; the peripheral cones are arranged circumferentially with the center of the intermediate cone as the center; and the height of the peripheral cones is less than that of the intermediate cone.

[0007] After adopting the above technical scheme, when arranging the sheets, the commutating copper sheet and 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 positioning groove, so that the hook foot of the commutating copper sheet falls into the positioning 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 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 face of the mica sheet with the peripheral truncated cone, and the inner circle of the peripheral truncated cone abuts against the inner groove surface of the half dovetail groove of the mica sheet. At this time, the inner side of the mica sheet abuts 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 have formed 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, place the positioning plate into the row of sheets cavity provided on the middle template. After the positioning plate is positioned by the positioning rod, the top height of the row of sheets of commutating copper sheets and mica sheets of the planar commutator completed on the positioning plate will be greater than the height of the upper end surface of the middle template. After completing the above operations, let the injection molding cavity of the compression molding mold plate face downward and align with the row of sheets as a whole. Knock the compression molding mold plate to let the injection molding cavity of the compression molding mold plate enter the row of sheets on the positioning plate from top to bottom. As the middle template is elastically compressed, until the entire row of sheets enters the injection molding cavity, when the entire row of sheets enters the injection molding cavity and is in close contact with the inner wall of the injection molding cavity, lift up the compression molding mold plate and flip it 180 degrees to make the injection molding cavity opening of the compression molding mold plate face upward. Finally, remove the row of sheets positioning core to complete the commutator sheet loading action of the planar commutator. The entire process will not cause the commutating copper sheets to fall out and become scattered, thereby improving work efficiency.

[0008] Preferably, the positioning plate, the middle frustum and the peripheral frustum are an integral injection-molded structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model has the following drawings:

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 for Figure 1An enlarged view of the middle row of slices positioning core and the rows of slices thereon as a whole;

[0012] Figure 3 for Figure 2 A view of the upper end surface of the middle row positioning core;

[0013] Figure 4 for Figure 3 AA view, DETAILED DESCRIPTION

[0014] As shown in the figure, the commutator segment loading tooling of the planar commutator of the utility model comprises a bottom template 14, a middle template 12 and a compression mold plate 7. The middle template 12 can move up and down and is elastically connected to the bottom template 14 through a spring 13. A plurality of row cavities 11 ( Figure 1 In the simplified diagram, there are two pieces, and each row of slices 11 is provided with a positioning rod 15, which is used to position the row of slices and the positioning core 10, and the positioning rod 15 is fixed on the bottom template 14, and the compression mold plate 7 is independently provided, and the compression mold plate 7 is provided with an injection mold cavity 8 corresponding to the row of slices 11 one by one; when the row of slices and the positioning core 10 are placed in the row of slices 11 and positioned by the positioning rod 15, the top height of the row of slices 9 of the planar commutator row of slices is completed on the row of slices and the positioning core 10 is greater than the upper end surface height of the middle template 12 ( Figure 1 The sheet arrangement positioning core 10 comprises a positioning plate 1 whose outer diameter matches the outer diameter of the sheet arrangement as a whole 9. The sheet arrangement as a whole 9 is composed of commutation copper sheets M and mica sheets N of a planar commutator arranged neatly in a circle. 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 for positioning the positioning rod 15 is arranged at the center of the intermediate truncated cone 3. A plurality of positioning grooves 4 are evenly arranged on the outer surface of the intermediate truncated cone 3. Each positioning 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. The height of the peripheral truncated cone 2 is less than that of the intermediate truncated cone 3.

[0015] like Figure 1-2As shown, during the sheet arrangement, the commutating copper sheet M and the mica sheet N of the planar commutator are placed on the sheet arrangement positioning core 10, the hook foot M1 of the commutating copper sheet falls into the positioning 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 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 as a whole 9 with neat circumference arrangement on the sheet arrangement positioning core 10, because the commutating 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, the sheet arrangement positioning core 10 is placed in the sheet arrangement cavity 11 provided on the middle template 12. After the sheet arrangement positioning core 10 is positioned by the positioning rod 15, the top height of the sheet arrangement as a whole 9 of the planar commutator commutation copper sheet and mica sheet arrangement completed on the sheet arrangement positioning core 10 will be greater than the upper end surface height of the middle template 12 ( Figure 1 As shown in the state), after completing the above operations, hold the injection mold cavity 8 of the compression mold plate 7 downward and align it with the row of slices 9 as a whole, knock the compression mold plate 7 to let the injection mold cavity 8 of the compression mold plate be inserted from top to bottom into the row of slices 9 on the positioning plate 1, as the middle template 12 is elastically compressed, until the row of slices 9 as a whole enters the injection mold cavity 8. When the row of slices 9 as a whole enters the injection mold cavity 8 and is in close contact with the inner wall of the injection mold cavity 8, lift up the compression mold plate 7 and turn it 180 degrees, so that the injection mold cavity 8 of the compression mold plate opens upward, and finally removes the row of slices positioning core 10 to complete the commutator segment feeding action of the planar commutator. The whole process will not cause the commutation copper sheet to fall out and become scattered, thereby improving work efficiency.

Claims

1. The commutator segment loading tooling of the planar commutator is characterized by: It includes a bottom template, a middle template and a compression mold plate. The middle template can move up and down and is elastically connected to the bottom template. A plurality of sheet-row cavities are arranged on the middle template. A positioning rod is arranged in each sheet-row cavity. The positioning rod is used to position a sheet-row positioning core. The positioning rod is fixed on the bottom template. The compression mold plate is independently arranged. The compression mold plate is provided with injection mold cavities corresponding to the sheet-row cavities one by one. When the sheet-row positioning core is placed in the sheet-row cavity and positioned by the positioning rod, the top height of the sheet-row of the planar commutator commutating copper sheet and mica sheet on the sheet-row positioning core is greater than the upper end surface height of the middle template.

2. The commutator segment loading tool for planar commutator according to claim 1, characterized in that: The sheet arrangement positioning core includes a positioning plate with an outer diameter matching the overall outer diameter of the sheet arrangement; an intermediate cone and a peripheral cone are provided on the upper end face of the positioning plate; a positioning hole for positioning the positioning rod is provided at the center of the intermediate cone; a plurality of positioning grooves are evenly distributed on the circumference of the outer surface of the intermediate cone; each positioning groove has an upper opening at the groove end; the peripheral cones are arranged circumferentially with the center of the intermediate cone as the center; and the height of the peripheral cones is less than that of the intermediate cone.

3. The commutator segment loading tool for 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.

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