CN217306919U

CN217306919U - Commutator with small inter-sheet deformation

Info

Publication number: CN217306919U
Application number: CN202220891226.5U
Authority: CN
Inventors: 陈辉; 郑道武; 喻洪权; 陈炜炜
Original assignee: Angu Group Co ltd
Current assignee: Angu Group Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-08-26
Anticipated expiration: 2032-04-18

Abstract

The utility model discloses a commutator that deformation is little between piece, including switching-over copper sheet and base member, the switching-over copper sheet is equipped with the multi-disc and evenly lays its characterized in that around the outer circumference of base member: the base body is composed of an inner layer base body made of bakelite powder and an outer layer base body made of plastic, the reversing copper sheets and the outer layer base body are of an integral injection molding structure, an inner hole defined by the inner side faces of the reversing copper sheets is matched with the outer circle of the inner layer base body, and a groove is formed in the middle of the inner side face of each reversing copper sheet to reduce the contact area between the inner side face and the outer circle of the inner layer base body. The utility model discloses can guarantee that the commutator has little inter-sheet deformation when high-speed operation, and then improve the hypervelocity performance of commutator, it is with low costs.

Description

Commutator with small inter-sheet deformation

Technical Field

The utility model relates to a commutator, concretely relates to commutator that the inter-sheet deflection is little.

Background

The commutator comprises a plurality of commutator copper sheets and a base body, wherein the commutator copper sheets are uniformly distributed around the outer circumference of the base body, the commutator copper sheets and the base body are of an integrated injection molding structure, and the base body is made of bakelite powder. The disadvantages that if the bakelite powder material is selected to be high in quality, although the cracking of the matrix can be better prevented, the commutator has small deformation between sheets when running at high speed, the service life is prolonged, but the cost is overhigh; if the base body is made of low-cost engineering plastic materials, the base body is easy to crack, the commutator has larger inter-piece deformation when running at high speed, the service life is short, and the working noise is large.

Disclosure of Invention

The utility model aims at providing a can guarantee that the commutator has little inter-segment deformation when high-speed operation, and then improves commutator overspeed performance, the commutator that the inter-segment deformation is little with low costs.

The utility model adopts the following technical proposal to complete:

the commutator with small inter-sheet deformation comprises a commutation copper sheet and a base body, wherein the commutation copper sheet is provided with a plurality of sheets and is uniformly distributed around the outer circumference of the base body, and the commutator is characterized in that: the base body is composed of an inner-layer base body made of bakelite powder materials and an outer-layer base body made of plastic materials, the reversing copper sheets and the outer-layer base body are of an integral injection molding structure, an inner hole defined by the inner side faces of the reversing copper sheets is matched with the outer circle of the inner-layer base body, and a groove is formed in the middle of the inner side face of each reversing copper sheet to reduce the contact area between the inner side face of each reversing copper sheet and the outer circle of the inner-layer base body.

The reversing copper sheet is composed of a main sheet body on the outer side, a ribbed plate on the inner side and a connecting plate with the smallest width of the middle plate, arc grooves are formed in the left side surface and the right side surface of the ribbed plate, and arc top protrusions are arranged in the middle of the left side surface and the right side surface of the connecting plate.

The top height of the arc top bulge is lower than the height of the rib plate at the position where the rib plate is connected with the connecting plate.

The inner-layer base body is a combination of bakelite powder and a metal bushing, and the metal bushing is positioned on the inner side of the inner-layer base body.

After the technical scheme is adopted, the utility model discloses at first design the base member into the components of a whole that can function independently structure of the inlayer base member of being made by the bakelite powder material and the outer base member of being made by the engineering plastics material, the inlayer base member is owing to adopted high-quality bakelite powder material, and has less area of contact with the medial surface of switching-over copper sheet, so can prevent effectively that the cracking of inlayer base member from and prevent that the cracking from transmitting to the outer base member; secondly, the left side surface and the right side surface of the reversing copper sheet are provided with arc grooves and arc top bulges, so that the outer-layer matrix and the reversing copper sheet are combined very firmly, and the influence of centrifugal force on the reversing copper sheet during high-speed operation is effectively eliminated; therefore, the commutator can be ensured to have small deformation between the sheets when the commutator runs at high speed, so that the overspeed performance of the commutator is improved, and the cost is lower because the outer layer matrix is made of common engineering plastic materials.

Drawings

The utility model discloses there is following figure:

figure 1 is a schematic structural diagram of the present invention,

figure 2 is a side directional diagram of the commutator sheet of figure 1,

fig. 3 is a top view of fig. 2.

Detailed Description

As shown in figures 1-3, the commutator of the utility model comprises a commutator copper sheet 1 and a base body, the commutator copper sheet 1 is provided with a plurality of sheets and is evenly distributed around the outer circumference of the base body, the base body is composed of an inner layer base body 3 made of bakelite powder material and an outer layer base body 2 made of common engineering plastic material (such as nylon 66), the copper sheet 1 that commutates is the integrative injection moulding structure with outer base member 2, the hole that the medial surface 133 of multi-disc copper sheet 1 enclosed jointly matches with the excircle of inlayer base member 3, a little interference fit between the two can, the medial surface 133 of every copper sheet that commutates sets up recess 132 in the middle part in order to reduce with the area of contact between the 3 excircles of inlayer base member, avoid the stress between the inlayer base member too big, inlayer base member 3 is the assembly of bakelite powder and metal bush 4, metal bush 4 is located the inboard of inlayer base member 3. The commutator copper sheet 1 is composed of a main sheet body 11 on the outer side, a ribbed plate 13 on the inner side and a connecting plate 12 with the smallest middle plate width, arc grooves 131 are formed in the left side surface and the right side surface of the ribbed plate 13, arc top protrusions 121 are arranged on the left side surface and the right side surface of the connecting plate 12 in the middle positions, the top height of each arc top protrusion 121 is lower than the height of the connecting plate where the ribbed plate is connected, the outer-layer base body 2 and the commutator copper sheet 1 can be combined very firmly through the arc grooves 131 and the arc top protrusions 121, and the influence of centrifugal force on the commutator copper sheet during high-speed operation of the commutator is effectively eliminated. According to the test, the utility model discloses a commutator, the interband deflection can be less than 0.02mm, and the interband deflection of commutator before improving is at 0.05 mm.

Claims

1. The commutator with small inter-sheet deformation comprises a commutation copper sheet and a base body, wherein the commutation copper sheet is provided with a plurality of sheets and is uniformly distributed around the outer circumference of the base body, and the commutator is characterized in that: the base body is composed of an inner-layer base body made of bakelite powder materials and an outer-layer base body made of plastic materials, the reversing copper sheets and the outer-layer base body are of an integral injection molding structure, an inner hole defined by the inner side faces of the reversing copper sheets is matched with the outer circle of the inner-layer base body, and a groove is formed in the middle of the inner side face of each reversing copper sheet to reduce the contact area between the inner side face of each reversing copper sheet and the outer circle of the inner-layer base body.

2. The commutator of claim 1, which has a small amount of inter-segment deformation, wherein: the reversing copper sheet is composed of a main sheet body on the outer side, a ribbed plate on the inner side and a connecting plate with the smallest width of the middle plate, arc grooves are formed in the left side surface and the right side surface of the ribbed plate, and arc top protrusions are arranged in the middle of the left side surface and the right side surface of the connecting plate.

3. The commutator of claim 2, wherein: the top height of the arc top bulge is lower than the height of the rib plate at the position where the rib plate is connected with the connecting plate.

4. A commutator having a small amount of inter-segment deformation as set forth in claim 1, 2 or 3, wherein: the inner-layer base body is a combination of bakelite powder and a metal bushing, and the metal bushing is positioned on the inner side of the inner-layer base body.