CN110518424B

CN110518424B - Groove type commutator

Info

Publication number: CN110518424B
Application number: CN201910874589.0A
Authority: CN
Inventors: 张余明
Original assignee: Zhejiang Lifeng Electric Appliances Co ltd
Current assignee: Zhejiang Lifeng Electric Appliance Co ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2021-07-27
Anticipated expiration: 2039-09-17
Also published as: CN110518424A

Abstract

The invention discloses a groove type commutator, which comprises a bakelite powder substrate and commutator copper sheets, wherein adjacent commutator copper sheets are insulated and isolated by mica sheets, fixing pins are arranged on the inner side surfaces of the commutator copper sheets, reinforcing ring grooves are arranged at the upper end and the lower end of each fixing pin, and reinforcing rings are arranged in the reinforcing ring grooves, and the groove type commutator is characterized in that: the inner side surface of the mica sheet is provided with a positioning groove, and the positioning groove positions the reinforcing ring so that the reinforcing ring is not contacted with the reinforcing ring groove; each reversing copper sheet is composed of a left half body and a right half body which are split in the middle and have the same shape, the left half body and the right half body are in close contact with each other, welding wire steps are respectively arranged at the tops of the left half body and the right half body, welding wire grooves are respectively formed in the welding wire steps, and the fixing feet are respectively arranged on the inner side surfaces of the left half body and the right half body. The invention can better ensure the strength, improve the overspeed performance of products, and simultaneously solve the problems that the fixed leg can not be punched from the side surface direction due to large circumferential angle of the reversing copper sheet and the working noise is large due to large circumferential dimension and large thermal deformation during working of the reversing copper sheet.

Description

Groove type commutator

Technical Field

The invention relates to an improved groove type commutator.

Background

The groove type commutator in the prior art comprises an bakelite powder substrate and a plurality of reversing copper sheets uniformly distributed on the periphery of the outer circle of the bakelite powder substrate, wherein insulation isolation is performed between adjacent reversing copper sheets through mica sheets, fixing pins are arranged on the inner side surfaces of the reversing copper sheets, reinforcing ring grooves are formed in the upper ends and the lower ends of the fixing pins, reinforcing rings are arranged in the reinforcing ring grooves, and because the reinforcing rings are positioned through the reinforcing ring grooves, the reinforcing rings can be in contact with the reinforcing ring grooves, the reinforcing rings cannot adopt high-strength iron materials, the strength of a groove type commutator product is further influenced, and the overspeed performance of the product is difficult to further improve. In addition, when the reversing copper sheet is formed, firstly, the cross section shape of the copper sheet is drawn out, then, the copper sheet is punched from the side direction, and a fixed pin and a reinforcing ring groove are simultaneously formed in the punching process; in addition, the commutation copper sheet with a large circumferential angle is often large in circumferential dimension and large in thermal deformation during operation, so that the circumferential surface of the commutator in contact with the carbon brush is not smooth, and the working noise is large.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide a groove commutator which better ensures the strength, improves the overspeed performance of products, and simultaneously solves the problems that the fixed leg cannot be punched from the side surface direction due to large circumferential angle of a commutation copper sheet and the working noise is large due to large circumferential dimension and large thermal deformation during working of the commutation copper sheet.

The invention is completed by adopting the following technical scheme:

the utility model provides a groove type commutator, includes bakelite powder base member and makes many switching-over copper sheets of circumference equipartition at the excircle of bakelite powder base member, carries out insulation by the mica sheet between the adjacent switching-over copper sheet and keeps apart, and the medial surface of switching-over copper sheet is equipped with fixed foot and implants bakelite powder base member in, and the upper and lower both ends of fixed foot are equipped with the reinforcement annular, and the reinforcement ring is placed to the reinforcement annular inslot, its characterized in that: the medial surface of mica sheet is equipped with the constant head tank, and the constant head tank is fixed a position reinforcing ring, makes reinforcing ring and reinforcing ring groove contactless.

Each reversing copper sheet is composed of a left half body and a right half body which are split in the middle and have the same shape, the left half body and the right half body are in close contact with each other, welding wire steps are respectively arranged at the tops of the left half body and the right half body, welding wire grooves are respectively formed in the welding wire steps, and the fixing feet are respectively arranged on the inner side surfaces of the left half body and the right half body.

Above-mentioned technical scheme's cell type commutator, it is first, set up the constant head tank through the medial surface of mica sheet and fix a position the reinforcement ring, prevent that reinforcement ring and reinforcement ring groove from producing the contact, the iron material that just can adopt high strength like this of reinforcement ring, better guarantees the high strength of cell type commutator, improves the product and exceeds speed limit the performance. Secondly, the reversing copper sheet is innovatively designed, a reversing copper sheet with a larger circumferential angle is split from the middle into a left half body and a right half body which have the same size, so that the circumferential angle of the original reversing copper sheet is halved, and fixing pins are respectively arranged on the inner side surfaces of the left half body and the right half body, so that the inner sides of two side wings of the reversing copper sheet cannot block the punching path of the fixing pins, further the reversing copper sheet can form the fixing pins simultaneously in the punching process, and the technical problem that the fixing pins cannot be punched from the side surface direction due to the large circumferential angle of the reversing copper sheet in the prior art is solved; meanwhile, the punching of the reinforcing ring grooves at the upper end and the lower end of the fixing leg cannot be influenced through the design, if the original design is adopted, the inner sides of the two side wings of the reversing copper sheet can also block part of the punching path of the reinforcing ring grooves, and the method is obviously not suitable unless the size of the reinforcing ring grooves is changed; in addition, as the circumferential size of the commutation copper sheet is reduced, the thermal deformation is small during the operation, the circumferential surface of the commutator contacted with the carbon brush is smooth, and the generation of the working noise is reduced.

Drawings

The invention has the following drawings:

figure 1 is a top view of the present invention,

figure 2 is a cross-sectional view B-B of figure 1,

figure 3 is an enlarged view of the commutator sheet of figure 1,

fig. 4 is a block diagram of a prior art commutator copper sheet.

Detailed Description

As shown in fig. 1-3, the groove type commutator of the present invention comprises a bakelite powder substrate 1 and thirteen commutating copper sheets 2 uniformly distributed on the outer circle of the bakelite powder substrate 1, wherein adjacent commutating copper sheets 2 are insulated and isolated by mica sheets 3, the inner side surfaces of the commutating copper sheets 2 are provided with fixing pins 5 implanted into the bakelite powder substrate 1, the upper and lower ends of the fixing pins 5 are provided with reinforcing ring grooves 8, reinforcing rings 6 are placed in the reinforcing ring grooves 8, the reinforcing rings 6 are iron rings made of metal, the inner side surfaces of the mica sheets 3 are provided with positioning grooves 31, and the positioning grooves 31 position the reinforcing rings 6, so that the reinforcing rings 6 are not in contact with the reinforcing ring grooves 8; each reversing copper sheet 2 is composed of a left half body 21 and a right half body 21 which are split in the middle (split line A) and have the same shape, the left half body 21 and the right half body 21 are in close contact with each other, the tops of the left half body 21 and the right half body 21 are respectively provided with a welding wire step 7, each welding wire groove 4 is formed in each welding step 7, and the fixing feet 5 are arranged on the inner side surfaces of the left half body 21 and the right half body 21.

Fig. 4 shows a commutator copper sheet of a groove commutator in the prior art, and it is obvious that when the commutator copper sheet 10 is punched from the side direction (arrow direction), the inner sides (portions 11) of the two side wings of the commutator copper sheet 10 block part of the punching path of the fixing legs 12 and the reinforcing ring groove 8, so that the fixing legs 12 and the reinforcing ring groove 8 cannot be punched.

Claims

1. The utility model provides a groove type commutator, includes the bakelite powder base member and makes the many switching-over copper sheets of circumference equipartition at the excircle of bakelite powder base member, carries out insulation by the mica sheet between the adjacent switching-over copper sheet and keeps apart, and the medial surface of switching-over copper sheet is equipped with fixed foot and implants the bakelite powder base member in, and the upper and lower both ends of fixed foot are equipped with the reinforcement annular, and the reinforcement ring is placed to reinforcement annular inslot, the medial surface of mica sheet is equipped with the constant head tank, and the constant head tank is fixed a position reinforcement ring, makes reinforcement ring and reinforcement annular contactless, its characterized in that: each reversing copper sheet consists of a left half body and a right half body which are split in the middle and have the same shape, the left half body and the right half body are in close contact with each other, the tops of the left half body and the right half body are respectively provided with a welding wire step, each welding step is provided with a welding wire groove, and the fixing feet are arranged on the inner side surfaces of the left half body and the right half body; the inner sides of the two side wings of the reversing copper sheet can not block the punching path of the fixing pin.