CN2563823Y

CN2563823Y - Permanent magnetic DC motor

Info

Publication number: CN2563823Y
Application number: CN 02266775
Authority: CN
Inventors: 李金东
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-29
Filing date: 2002-08-29
Publication date: 2003-07-30
Anticipated expiration: 2012-08-29

Abstract

The utility model discloses a permanent magnet DC motor, which comprises a casing (4), a magnetic shoe (5), a rotor, an electric brush assembly (3) and two end caps (1, 9), wherein the rotor is arranged between the two end caps (1, 9) which are arranged on the casing (4). The diameters of revolution axes (10) are the same, an axle elastic damping ring (14) is arranged on the revolution axis (10) on one side of a bearing (13) of the end cap (1) of the electric brush, and an adjusting washer (17) is arranged on the revolution axis (10) on one side of the bearing (13) of the driving end cap (9); a ventilation slot (8) is arranged on a rotor core assembly (7); the two end caps (1, 9) are provided with reinforcing ribs, concurrently radiating fins. After the structure is adopted, the revolution axes (10) is manufactured once, the quality is ensured, and the assembly is convenient; the rotor core assembly (7) is provided with the ventilation slot (8), which makes the rotor radiate heat well, save the material, and make the weight light and is favorable for the firm output of the motor power; the utility model has the advantages of the simple structure, convenient assembly, good heat dispersion, high efficiency, light weight, low cost, etc.

Description

Permanent magnet DC motor

One, technical field

The invention relates to a kind of motor, particularly a kind of permanent magnet DC motor.

Two, background technology

The automobile-used permanent magnet DC motor of existing electric return board adopts original traditional permanent magnet DC motor structure, some weak point below main the existence: the one, machine shaft is provided with multistage axle bumper, because the precision of rotating shaft, axiality and roughness require high, therefore, the machine shaft difficulty of processing is big, efficient is low, scrappage is high, also inconvenience of rotor assembling and final assembly; The 2nd, the motor rotor core assembly is real cored structure, and radiating effect is poor, waste of material, Heavy Weight, influences the stable output of power of motor; The 3rd, electric motor end cap had not both had reinforcement, did not have fin again, and mechanical strength and heat dispersion are poor under the situation of same material.

Three, summary of the invention

In order to overcome the existing permanent magnet DC motor rotating shaft processing and the inconvenience of assembling, the disadvantage of radiating effect difference, the invention provides a kind of machine shaft equal diameters, rotor core assembly to be provided with ventilation slot and is provided with the hold concurrently permanent magnet DC motor of fin of reinforcement so that two end cap to be arranged.The invention solves technical scheme that its technical problem adopts, and it comprises casing, stator, rotor, brush assembly and brush cover and driving end cap, rotor is made of iron core assembly, coil, commutator assembly, rotating shaft and rotor core compacting ring, rotor by Bearing Installation between two end cap, two end cap is fixed on the casing, described rotating shaft equal diameters, in the rotating shaft of bearing one side of brush cover, circlip for shaft is set, in the rotating shaft of bearing one side that drives end cap, the adjustment packing ring is set.

At least two ventilation slots are set on the described rotor core assembly.

Described brush cover outer surface is provided with the radiation-like reinforcement fin of holding concurrently; The drive end exterior surface is provided with the concave reinforcing rib fin of holding concurrently, and inner surface is provided with the radiation-like reinforcement fin of holding concurrently.

After adopting said structure, because the machine shaft equal diameters has been cancelled the multistage axle bumper on the machine shaft, rotating shaft can adopt coreless grinding machine to process, under the prerequisite that does not influence quality, can improve machining accuracy, axiality and roughness, can make things convenient for the assembling of rotor and complete machine again; Because the rotor core assembly is provided with a plurality of ventilation slots, rotor good heat dissipation effect, material province, in light weight help the stable output of power of motor again; Two end cap is provided with the reinforcement fin of holding concurrently and improves mechanical strength and heat dispersion; Have simple in structure, easy to assembly, production efficiency is high, in light weight, low cost and other advantages.

Four, description of drawings

Fig. 1 is the structural representation of the invention.

Fig. 2 is the hold concurrently structure distribution schematic diagram of fin of brush cover outer surface reinforcement.

Fig. 3 is the hold concurrently structure distribution schematic diagram of fin of drive end exterior surface concave reinforcing rib.

Fig. 4 is the hold concurrently structure distribution schematic diagram of fin of drive end interior surface reinforcement.

Five, embodiment

Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, specific embodiments for a kind of permanent magnet DC motor of the invention, it comprises casing 4, magnetic shoe 5, rotor, brush assembly 3 and brush cover 1 and driving end cap 9, rotor is by iron core assembly 7, coil 6, commutator assembly 2, rotating shaft 10 and rotor core compacting ring 16 constitute, rotor is installed in two end cap 1 by bearing 13, between 9, two end cap 1,9 are fixed on the casing 4, casing 4 is fixed on the base 15, rotating shaft 10 equal diameters, iron core assembly 7, commutator assembly 2 and two bearings 13 are directly installed in the rotating shaft, in the rotating shaft 10 of bearing 13 sides of brush cover 1, circlip for shaft 14 is set, in the rotating shaft 10 of bearing 13 sides that drive end cap 9, is provided with and adjusts packing ring 17.In order to accelerate the rotor heat radiation, at least two ventilation slots 8 are set on rotor core assembly 7.In order to improve mechanical strength and complete machine heat dispersion, brush cover 1 outer surface is provided with the radiation-like reinforcement fin 12 of holding concurrently, and drives end cap 9 outer surfaces and hold concurrently fin 19 and inner surface of concave reinforcing rib is set the radiation-like reinforcement fin 18 of holding concurrently is set.For the ease of connecting, rotating shaft 10 outputs are provided with axle sleeve 11, and sprocket wheel 20 is fixed on the output of rotating shaft 10.

Claims

1, a kind of permanent magnet DC motor, it comprises casing (4), magnetic shoe (5), rotor, brush assembly (3) and brush cover (1) and driving end cap (9), rotor is by iron core assembly (7), coil (6), commutator assembly (2), rotating shaft (10) and rotor core compacting ring (16) constitute, rotor is installed in two end cap (1 by bearing (13), 9) between, two end cap (1,9) be fixed on the casing (4), it is characterized in that: described rotating shaft (10) equal diameters, in the rotating shaft (10) of bearing (13) one sides of brush cover (1), circlip for shaft (14) is set, in the rotating shaft (10) of bearing (13) one sides that drive end cap (9), is provided with and adjusts packing ring (17).

2, permanent magnet DC motor according to claim 1 is characterized in that: described rotor core assembly (7) is gone up at least two ventilation slots (8) is set.

3, permanent magnet DC motor according to claim 1 and 2 is characterized in that: described brush cover (1) outer surface is provided with the radiation-like reinforcement fin (12) of holding concurrently.

4, permanent magnet DC motor according to claim 3 is characterized in that: described driving end cap (9) outer surface is provided with the concave reinforcing rib fin (19) of holding concurrently.

5, permanent magnet DC motor according to claim 4 is characterized in that: described driving end cap (9) inner surface is provided with the radiation-like reinforcement fin (18) of holding concurrently.

6, permanent magnet DC motor according to claim 5 is characterized in that: described rotating shaft (10) output is provided with axle sleeve (11).