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A method of manufacturing a commutator

A commutator and commutator piece technology, applied in the field of motors, can solve the problems of difficult to achieve large-sized annular varistor, difficult to ensure electrical connection, difficult to weld, etc., to achieve easy implementation and easy welding of annular variable resistance. The effect of resistance and good EMC level

Inactive Publication Date: 2017-02-01
JOHNSON ELECTRIC GUANGDONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Figure 21 A defect of the scheme shown is that: after the wire end 4' of the coil is welded to the hook 32' of the commutator segment, an oxide film will be formed on the surface of the wire end 4' and the hook 32' to prevent the wire end 4' from hooking the hook. 32' is oxidized
Because the oxide film is non-conductive, it is difficult to weld the electrode 51' of the ring varistor to the hook 32'; even if the welding is successful, it is difficult to ensure that the two are electrically connected
In addition, the annular varistor 5' is installed on the outer surface of the commutator segment 3', which is easily damaged by the outside
[0006] also, Figure 21 In the scheme shown, the inner ring of the ring varistor is larger than the cylinder surrounded by the commutator slices. If the number of commutator poles is large or the output is large, a larger volume of ring varistor will be required. Some annular varistor sintering technologies are difficult to achieve large-sized annular varistors

Method used

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  • A method of manufacturing a commutator
  • A method of manufacturing a commutator
  • A method of manufacturing a commutator

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no. 1 example

[0023] figure 1 and figure 2 They are respectively a three-dimensional schematic diagram and a longitudinal sectional view of the commutator in the first embodiment of the present invention. refer to figure 1 and figure 2 , the commutator includes a commutator base 2 , several commutator segments 3 , several connecting segments 4 and ring resistors 5 . Wherein, the commutator base body 2 is a columnar insulator, and there is an axial through hole in the middle of the commutator base body 2 for installing the rotating shaft of the rotor. Each commutator segment 3 is spaced apart from each other to achieve insulation. The commutator segment 3 includes a main body 31 and a hook 32. The inner side of the main body 31 has a protruding embedded part 33, and the embedded part 33 is fixedly embedded in the The commutator base 2, the hook 32 is fixed to the hooked end of the commutator segment main body 31 and protrudes outward. In this embodiment, the connecting piece 4 and t...

no. 2 example

[0035] Figure 8 and Figure 9 are respectively an exploded view and a three-dimensional schematic view of the commutator of the second embodiment of the present invention, Figure 10 and Figure 11 They are the front view and the A-A longitudinal section view respectively.

[0036] refer to Figure 8 to Figure 11 , The main difference between the commutator of this embodiment and the commutator of the first embodiment lies in the shape of the connecting piece 4 . In this embodiment, the connecting piece 4 and the commutator piece 3 are formed separately, and the width of the connecting piece 4 is similar to the width of the main body 31 of the commutator piece 3 . The fixed end of the connecting piece 4 is fixed to the inner side of the hooked end of the main body 31 of the connecting piece 3 by welding. The ring varistor 5 is installed in the area surrounded by the protruding end of the connecting piece 4 . The extended end of the connecting piece 4 is narrowed to form...

no. 3 example

[0047] The present invention has been described in detail above with reference to the accompanying drawings. In the above-mentioned embodiment, the connecting piece 4 is mounted to the inner side of the commutator piece 3, but the present invention is not limited to this case. For example, as an alternative solution, the connecting piece 4 can be coplanar with the commutator piece 3, or as a whole. The manufacturing method of this replacement commutator will be briefly described below in conjunction with the accompanying drawings.

[0048] First, if Figure 19 As shown, some teeth 35 and some connecting pieces 4 are cut out on one side of the sheet 7, the teeth 35 and connecting pieces 4 are arranged in a staggered manner, and the number of teeth 35 and connecting pieces 4 is equal to that of the desired commutator piece. quantity, then bend the teeth 35 towards one side to form hooks, and roll the sheet into a ring with the hooks facing outwards to obtain a commutator ring....

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Abstract

The invention relates to a commutator manufacturing method. the commutator manufacturing method includes cutting a plurality of teeth (35) and connecting sheets (4) on one side edge of a sheet; bending the teeth (35) towards one face to form hooks, rolling the sheet into an annular shape to enable the hooks facing outwardly to acquire a commutator ring; injecting molding inside the commutator ring to form an insulated commutator substrate (2); notching axially along the commutator ring to correspondingly form a plurality of mutually separated commutator sheets with one hook (32) and one connecting sheet (4) in each of the commutator sheets; mounting an annular rheostat (5) to one end of the connecting sheet (4) of the commutator ring, and welding each of the connecting sheets (4) to electrodes (51) corresponding to the annular rheostat (5).

Description

technical field [0001] The invention relates to the field of motors, in particular to a commutator of the motor and a method for manufacturing the commutator. Background technique [0002] Figure 20 is a schematic diagram of an existing commutator. Such as Figure 20 As shown, the commutator includes a commutator base 2' and several commutator segments 3'. Wherein, the commutator base body 2' is an insulating hollow cylinder, and the commutator base body 2' is concentrically fixedly mounted on the rotating shaft 1' of the motor rotor, and can rotate along with the rotating shaft 1'. The commutator segments 3' are evenly installed on the commutator base 2', each commutator segment 3' is insulated from each other, and a part of the commutator segment 3' is embedded in the commutator base 2' to be fixed to the commutator Device base 2'. The coil end of the commutator piece 3' has a hook 32', and the wire end 4' of the coil is welded to the hook 32'. [0003] When the commu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R43/06
Inventor 罗庆斌沈延新
Owner JOHNSON ELECTRIC GUANGDONG CO LTD
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