A two-pair-pole magnet and one-pair-carbon-brush motor for short-time operation

Abstract

The invention relates to a motor with two pairs of poles and one pair of carbon brushes for short-time working mode, which solves the technical problems of low production efficiency and high cost caused by the structure in the prior art. The present invention comprises a casing, two carbon brushes and four magnets arranged on the inner wall of the casing, and a rotor; the angle between the two carbon brushes is 90 degrees; the rotor is provided with an armature with a 6-slot structure and 6 commutators, or a 12*N slot structure and 12*N plates; the 6 slots of the armature and the 6 commutators are grouped together; the armature part corresponding to each slot is marked as a-f, and the raised plate between the armature d and the armature e is taken as the starting point, which are marked as 1-6 respectively; its winding structure is that the wire is introduced from the raised plate 3# and the raised plate 6#, and is led out along the raised plate 1# after being wound along the armature d and the armature a; the wire is introduced along the raised plate 2# and the raised plate 5#, and is led out along the raised plate 6# after being wound along the armature c and the armature f; the wire is introduced along the raised plate 1# and the raised plate 4#, and is led out along the raised plate 5# after being wound along the armature b and the armature e.

Description

Technical Field

[0001] The invention relates to a brushed motor, in particular to a motor with two pairs of poles and one pair of carbon brushes for a short-time working mode. Background Art

[0002] When selecting products in the early stage, brushed motors are often used for design. Based on the high torque and low speed requirements of some products, brushed motors are generally designed as two pairs of pole magnets, and the two pairs of pole magnets are respectively adapted to two pairs of carbon brushes. Figure 1-Figure 3 As shown, a six-slot brushed motor structure with two pairs of pole magnets and two pairs of carbon brushes includes a housing 01 and a rotor in the housing 01; four magnets 02 are evenly arranged on the inner wall of the housing 01 along the circumferential direction, and a six-slot armature 04, a six-piece commutator 05 and four carbon brushes 03 are arranged on the rotor, and the raised pieces of the commutator 05 are distributed corresponding to the slots of the armature 04; the four carbon brushes 03 are divided into two pairs along the radial direction, and the two carbon brushes 03 of each pair are connected by a lead wire 06, which is used to continuously contact each commutator 05 when the rotor rotates. The armature parts between each slot and the next slot in the counterclockwise direction are marked with numbers af respectively, and the rising piece of the commutator 05 between armature f and armature a is taken as the starting point, and the rising pieces in the counterclockwise direction are marked with numbers 1-6 respectively, and the winding structure is as follows: the wire is introduced along rising piece 1#, and is led out along rising piece 2# after being wound along armature a; the wire is introduced along rising piece 2#, and is led out along rising piece 3# after being wound along armature b; the wire is introduced along rising piece 3#, and is led out along rising piece 4# after being wound along armature c; the wire is introduced along rising piece 4#, and is led out along rising piece 5# after being wound along armature d; the wire is introduced along rising piece 5#, and is led out along rising piece 6# after being wound along armature e; the wire is introduced along rising piece 6#, and is led out along rising piece 1# after being wound along armature f.

[0003] Although this structure of two pairs of pole magnets and two pairs of carbon brushes can be used in situations where the speed is low and the output torque is large, its structure is relatively complex, and the carbon brushes distributed radially need to be connected through lead wires, which brings certain difficulties to processing and assembly. Limited by the internal space of the motor, its wiring is difficult, so the efficiency of the brushed motor with this structure is low in mass production and there is no obvious cost advantage. In some special applications, the brushed motor adopts a short-time working system and does not have a long life requirement, which makes the above cost problem particularly prominent. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems of low production efficiency and high cost caused by the structure in the prior art, and to provide a two-pole magnetic steel and one-pair carbon brush motor for short-time working mode.

[0005] In order to achieve the above purpose, the technical solution provided by the present invention is as follows:

[0006] A two-pole magnet and one-pair carbon brush motor for short-time working mode, comprising a housing, carbon brushes and four magnets uniformly arranged on the inner wall of the housing along the circumferential direction, and a rotor coaxially arranged in the housing;

[0007] The rotor is provided with an armature and a commutator, the armature is a 6-slot structure and the commutator is 6-pieces, or the armature is a 12*N slot structure and the commutator is 12*N pieces, where N is a non-zero natural number;

[0008] The raised plates of each commutator are distributed correspondingly to the slots of the armature;

[0009] Its special features are:

[0010] There are two carbon brushes; the angle between the two carbon brushes is 90°;

[0011] Every 6 consecutive slots of the armature and the corresponding 6 raised plates of the commutator form a group;

[0012] In each group, the armature parts between each slot and the next slot in the clockwise direction are marked with numbers af respectively, and taking the raised piece between armature d and armature e as the starting point, each raised piece is marked with numbers 1-6 in the clockwise direction; its winding structure is that the wire is introduced from raised piece 3# and raised piece 6#, and is successively wound along armature d and armature a, and then led out along raised piece 1#; the wire is introduced along raised piece 2# and raised piece 5#, and is successively wound along armature c and armature f, and then led out along raised piece 6#; the wire is introduced along raised piece 1# and raised piece 4#, and is successively wound along armature b and armature e, and then led out along raised piece 5#.

[0013] Furthermore, the value of N is 1, 2, 3, 4 or 5.

[0014] Furthermore, the winding structure is completed by an automatic winding machine.

[0015] The beneficial effects of the present invention compared with the prior art are as follows:

[0016] 1. The present invention provides a motor with two pairs of poles and one pair of carbon brushes for short-time working mode. According to the working conditions of the brushed motor in short-time working mode, the winding method is changed, a pair of carbon brushes is removed, and the wiring is simplified, so that the winding process can be completed using automated equipment, thereby improving production efficiency and product consistency.

[0017] 2. The present invention provides a motor with two pairs of poles and one pair of carbon brushes for short-time working mode. Structurally, one pair of carbon brushes is eliminated and no wiring is required between the carbon brushes, thereby reducing production costs and improving product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an existing motor with two pairs of pole magnets and two pairs of carbon brushes;

[0019] Figure 2 It is the winding annotation diagram of the existing two pairs of pole magnets and two pairs of carbon brush motors;

[0020] Figure 3 The present invention is a schematic diagram of the winding connection of an existing motor with two pairs of pole magnets and two pairs of carbon brushes.

[0021] Figures 1 to 3 The reference numerals in the figure are explained as follows: 01 - housing; 02 - magnet; 03 - carbon brush; 04 - armature; 05 - commutator; 06 - lead wire.

[0022] Figure 4 It is a structural schematic diagram of an embodiment of a two-pair-pole magnetic steel and one-pair-carbon-brush motor for short-time working mode of the present invention;

[0023] Figure 5 is a winding annotation diagram of an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the wire winding connection of an embodiment of the present invention, wherein (A), (B) and (C) are respectively exploded views of the wire winding connection.

[0025] Figures 4 to 6 The reference numerals in the drawings are described as follows:

[0026] 11- housing; 12- magnet; 13- carbon brush; 14- armature; 15- commutator. DETAILED DESCRIPTION

[0027] The specific technical solutions in the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 4-Figure 6 An embodiment of the present invention provides a two-pole magnet and a pair of carbon brushes motor for short-time working mode. The motor has a six-slot, two-pole structure, mainly including two pairs of pole magnets, a pair of carbon brushes, and the radial directions of the carbon brushes are not in a straight line, and the carbon brushes are distributed at an angle of 90°.

[0029] The specific structure includes a casing 11 and a rotor in the casing 11; four magnets 12 are evenly arranged on the inner wall of the casing 11 along the circumferential direction, and an armature 14 with a 6-slot structure and 6 commutators 15 are arranged on the rotor, and the 6 slots of the commutator 15 and the 6 raised plates of the armature 14 are evenly distributed along the circumferential direction; two carbon brushes 13 are arranged on the rotor along the circumferential direction for continuous contact with each commutator 15 when the rotor rotates; the angle between the two carbon brushes 13 is 90°; there is no lead wire between the two carbon brushes 13, but the wires are directly led out respectively.

[0030] The armature parts between each slot and the next slot in the clockwise direction are marked with numbers af respectively, and taking the raised piece between armature d and armature e as the starting point, each raised piece in the clockwise direction is marked with numbers 1-6 respectively; its winding structure is that the wire is introduced into the raised piece 3# and the raised piece 6#, and is successively wound along the armature d and along the armature a, and then led out along the raised piece 1#; the wire is introduced into the raised piece 2# and the raised piece 5#, and is successively wound along the armature c and along the armature f, and then led out along the raised piece 6#; the wire is introduced into the raised piece 1# and the raised piece 4#, and is successively wound along the armature b and along the armature e, and then led out along the raised piece 5#.

[0031] By comparing the test data, it is found that there is no significant difference between the performance of the motor with this structure and that of the traditional motor. At the same time, the material cost is reduced by about 10%. In addition, the winding structure is completed by an automatic winding machine, which increases the production efficiency by about 30%.

[0032] In other embodiments of the present invention, the structure is also applicable to a 12-slot two-pole magnetic steel structure, a 24-slot two-pole magnetic steel structure, a 36-slot two-pole magnetic steel structure, a 48-slot two-pole magnetic steel structure, a 60-slot two-pole magnetic steel structure, etc., that is, a brushed motor with a two-pole magnetic steel structure increasing from the 12-slot base can save a pair of carbon brushes.

[0033] The above content is only an embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A two-pole magnet and one-pair carbon brush motor for short-time working mode, comprising a housing (11), carbon brushes (13) and four magnets (12) uniformly arranged on the inner wall of the housing along the circumferential direction, and a rotor coaxially arranged in the housing (11); An armature (14) and a commutator (15) are arranged on the rotor, the armature (14) is a 6-slot structure and the commutator (15) is a 6-piece structure, or the armature (14) is a 12*N slot structure and the commutator (15) is a 12*N piece structure, where N is a non-zero natural number; The raised plates of each commutator (15) are arranged corresponding to the slots of the armature (14); Features: The number of the carbon brushes (13) is two; the angle between the two carbon brushes (13) is 90°; Every six consecutive slots of the armature (14) and the corresponding six raised plates of the commutator (15) form a group; in each group, the armature parts between each slot and the next slot are marked as af in the clockwise direction, and the raised plate between the armature d and the armature e is taken as the starting point, and each raised plate is marked as 1-6 in the clockwise direction; its winding structure is that the wire is introduced from the raised plate 3# and the raised plate 6#, and is successively wound along the armature d and the armature a, and then led out along the raised plate 1#; the wire is introduced along the raised plate 2# and the raised plate 5#, and is successively wound along the armature c and the armature f, and then led out along the raised plate 6#; the wire is introduced along the raised plate 1# and the raised plate 4#, and is successively wound along the armature b and the armature e, and then led out along the raised plate 5#.

2. A two-pair-pole magnetic steel and one-pair-carbon-brush motor for short-time working mode according to claim 1, characterized in that: The value of N is 1, 2, 3, 4 or 5.

3. The two-pair-pole magnetic steel and one-pair-carbon-brush motor for short-time working mode according to claim 1, characterized in that: The winding structure is completed by an automatic winding machine.

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