Bimetal commutator segment for motor commutator

Abstract

The utility model discloses a bimetallic commutator segment for a motor commutator, which belongs to the technical field of commutator segments and comprises a commutator segment. The commutator segment adopts an aluminum-copper composite structure, the matching part of the commutator segment and the carbon brush is made of copper, and the insertion block is made of aluminum; the cross section of the insertion block is in an I shape formed by two cross rods with different lengths and a longitudinal rod; wherein the long cross rod is fixedly connected with the matching position of the carbon brush, and the outer side of the short cross rod is symmetrically provided with inclined surfaces; side edge grooves are evenly formed in the side edge of the inserting block at equal intervals. According to the mode, the aluminum-copper composite structure is selected, the use performance of the commutator segment is guaranteed, the installation strength of the commutator segment is guaranteed, the connection strength between the carbon brush matching position and the insertion block is guaranteed, the cost is reduced, and the overall weight of the commutator is reduced; the cross section of the inserting block is arranged to be in an I shape formed by the two transverse rods with different lengths and the longitudinal rod, so that the connection strength between the inserting block and the insulating sleeve is guaranteed, and the annular supporting strength is guaranteed; and through the arrangement of the side grooves and the end grooves, the axial supporting strength between the insertion block and the insulating sleeve is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of commutator segment technology, specifically to bimetallic commutator segments for motor commutators. Background Technology

[0002] The commutator serves a rectification function, which is to make the direction of the current in the armature winding alternate so as to ensure that the direction of the electromagnetic torque remains constant. Its main structure consists of multiple metal commutator segments mounted on a cylindrical insulating cylinder. To ensure conductivity, the commutator segments are usually made of copper.

[0003] However, to ensure installation strength, a protruding plug structure is usually provided on the side of the carbon brush mating point installed inside the insulating cylinder; and copper materials are expensive and heavy. If the entire commutator segment is made of copper, it is difficult to reduce the overall cost and weight while ensuring connection strength.

[0004] Based on this, the present invention designs a bimetallic commutator segment for a motor commutator to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a bimetallic commutator segment for motor commutators.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] Bimetallic commutator segments for motor commutators, including commutator segments;

[0008] The commutator segment is made of aluminum-copper composite structure; the part where it mates with the carbon brush is made of copper and the part where it inserts is made of aluminum; the cross-section of the insert is set as an I-shape consisting of two horizontal bars of different lengths and a vertical bar; the long horizontal bar is fixedly connected to the part where it mates with the carbon brush, and the outer side of the short horizontal bar is symmetrically set as an inclined surface; the side of the insert has side grooves evenly spaced.

[0009] Furthermore, the carbon brush is fitted with a silver-copper alloy at all points.

[0010] Furthermore, the side groove is shaped as an isosceles trapezoid, with the shorter side of the isosceles trapezoid located at the middle of the long crossbar of the insert block.

[0011] Furthermore, end slots are provided at both ends of the insert.

[0012] Compared with the prior art, the advantages of this utility model are as follows: 1. By selecting an aluminum-copper composite structure, the performance of the commutator segments is guaranteed, the installation strength of the commutator segments is guaranteed, the connection strength between the carbon brush mating point and the plug is guaranteed, and the cost and overall weight of the commutator are reduced. During operation, multiple sets of commutator segments are installed on the insulating sleeve through plugs, and insulating seams are provided between the commutator segments, with the carbon brush mating point located on the outside of the insulating sleeve. The performance of the commutator is guaranteed by using a silver-copper alloy material at the carbon brush mating point. At the same time, by setting the cross-section of the plug to an I-shape consisting of two horizontal bars of different lengths and a vertical bar, the connection strength between the plug and the insulating sleeve is guaranteed, as well as the circumferential support strength. The axial support strength between the plug and the insulating sleeve is guaranteed by the setting of side grooves and end grooves. By setting the shape of the side groove to an isosceles trapezoid, with the short side of the isosceles trapezoid located in the middle of the long horizontal bar of the plug, the overall structural strength of the plug is guaranteed, allowing the plug to withstand axial force and ensuring that the inner thickness is sufficient to resist shear force. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This invention relates to a three-dimensional bimetallic commutator segment for a motor commutator. Figure 1 ;

[0015] Figure 2 This is a front view of the bimetallic commutator segment for the motor commutator of this utility model;

[0016] Figure 3 This is a left view of the bimetallic commutator segment for the motor commutator of this utility model.

[0017] The labels in the diagram represent:

[0018] 1. Commutator segment; 11. At the carbon brush mating point; 12. Insert block; 121. Side groove; 122. End groove. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0021] In some embodiments, please refer to the accompanying drawings. Figures 1-3 The motor commutator uses bimetallic commutator segments, including commutator segment 1;

[0022] The commutator segment 1 is made of aluminum-copper composite structure; the carbon brush mating point 11 is made of copper and the insert block 12 is made of aluminum; the cross section of the insert block 12 is set as an I-shape consisting of two horizontal bars of different lengths and a vertical bar; the long horizontal bar is fixedly connected to the carbon brush mating point 11, and the outer side of the short horizontal bar is symmetrically set as an inclined surface; the side of the insert block 12 is evenly provided with side grooves 121 at equal intervals.

[0023] Aluminum-copper composite structures are commercially available and mature materials; for example, aluminum-copper composite structures produced by Hubei Jintai Composite Materials Co., Ltd. can be selected.

[0024] The carbon brush mating point 11 is made of a silver-containing copper alloy, wherein the silver content is 0.03% to 0.3%.

[0025] The side groove 121 is shaped as an isosceles trapezoid, and the short side of the isosceles trapezoid is located in the middle of the long horizontal bar of the insert block 12.

[0026] The insert 12 has end slots 122 at both ends.

[0027] In this embodiment, when the bimetallic commutator segments of the motor commutator are working normally, the use of an aluminum-copper composite structure ensures the performance of the commutator segments 1, the installation strength of the commutator segments 1, the connection strength between the carbon brush mating point 11 and the plug 12, and reduces costs and the overall weight of the commutator. During operation, multiple sets of commutator segments 1 are mounted on the insulating sleeve through the plug 12, and an insulating gap is provided between the commutator segments 1. The carbon brush mating point 11 is located outside the insulating sleeve. The use of a silver-copper alloy material at the carbon brush mating point 11 ensures the performance of the commutator. Performance; simultaneously, by setting the cross-section of the insert 12 to an I-shape consisting of two horizontal bars of different lengths and a vertical bar, the connection strength between the insert 12 and the insulating sleeve is ensured, as well as the circumferential support strength; the side groove 121 and the end groove 122 are provided to ensure the axial support strength between the insert 12 and the insulating sleeve; by setting the shape of the side groove 121 to an isosceles trapezoid, with the short side of the isosceles trapezoid located in the middle of the long horizontal bar of the insert 12, the overall structural strength of the insert 12 is ensured, enabling the insert 12 to withstand axial force and ensuring that the inner thickness is sufficient to resist shear force.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bimetallic commutator segment for a motor commutator, comprising a commutator segment (1), characterized in that: The commutator segment (1) is an aluminum-copper composite structure; the carbon brush mating point (11) is made of copper, and the insert (12) is made of aluminum; the cross section of the insert (12) is set as an I-shape consisting of two horizontal bars of different lengths and a vertical bar; the long horizontal bar is fixedly connected to the carbon brush mating point (11), and the outer side of the short horizontal bar is symmetrically set as an inclined surface; the side of the insert (12) is evenly provided with side grooves (121) at equal intervals.

2. The bimetallic commutator segment for a motor commutator according to claim 1, characterized in that, The carbon brush mating area (11) is made of silver-containing copper alloy.

3. The bimetallic commutator segment for a motor commutator according to claim 2, characterized in that, The side groove (121) is shaped as an isosceles trapezoid, and the short side of the isosceles trapezoid is located in the middle of the long horizontal bar of the insert (12).

4. The bimetallic commutator segment for a motor commutator according to claim 3, characterized in that, The insert (12) has end slots (122) at both ends.

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