CN2469607Y - Small-sized DC permanent-magneltic steady speed motor - Google Patents

Abstract

The utility model relates to a small-sized DC permanent-magnetic steady speed motor, which is mainly used as the acoustic equipment of a motorcar comprising a hollow tubular outer shell with a bottom,A small-sized DC permanent-magnetic steady speed motor is mainly used in the automotive audio equipment. The utility model comprises a hollow cannular shell with a bottom, a permanent magnet arranged a permanent magnet in the hollow tubular outer shell with a bottom, a rotor comprising an armature and a commutator, an electric brush which is connected with the opening end of the outer shell and iin the shell, a rotor that is formed by an armature and a commutator, an electrical brush that is connected with the open end of the shell and contacted with the commutator in the sliding way, and a s sliding contact with a commutator and a shell cover which is electrically connected with the input terminal of the electric brush. The utility model is characterized in that a shock-absorbing pad isshell lid that is electrically connected to the input terminal of the electrical brush. The utility model is characterized in that the shell lid is lined with a vibration-reducing cushion, a spherical arranged in the shell cover; a kind of spherical oil-containing bearing is enchased in the port of outer shell; the other kind of spherical oil-containing bearing is enchased in the center of a plast oil-containing bearing is embedded at the end port of the shell and another spherical oil-containing bearing is beset in a plastic inner end lid and can rotate to support the rotor. Moreover, the ciric inner end cover for rotatable supporting the rotor. A piece of steady speed plate is arranged in the circuit of the motor, the steady speed plate can assure the stability of running of the motor. cuit of the motor also has a speed stabilizing board which guarantees the stability of the rotation of the motor.

Description

Small-sized DC permanent magnetism steady speed motor

The utility model relates to a kind of miniature motor, refers in particular to a kind of small-sized DC permanent magnetism steady speed motor that is mainly used in hoot device and precision instrument.

Along with developing of automobile industry, middle and high shelves automobile all is equipped with stereo set, the motor that is used for hoot device is had its own specific (special) requirements, because vehicle operational mode is relatively abominable, variation significantly (automobile is from south to the north) as humiture, therefore high especially to the specification requirement of the motor that is used for hoot device, especially indexs such as noise, vibration proof and useful life there is quite high requirement, general miniature motor can not adapt to.Chinese patent once disclosed a kind of " miniature motor " (ZL93121378, stop), it contain one that make by metal material, be shaped as the hollow tubular body at a band end and have a shell that installs to the permanent magnet on the perimeter surface in it regularly, also contain a rotor that constitutes by armature and commutator and openend and engage and have with the brush of this commutator sliding contact and be electrically connected to the cap of the input terminal on this brush with this shell; This rotor can be rotated to support on the bottom and the bearing on this cap that is located at this shell, also have a printed circuit board (PCB) with a control element and sound insulationg board to form one and see it is a criss-cross shape, reached the purpose that to make and to be easy to assemble with high stock utilization from projecting to a shape on the axial line plane orthogonal with this rotor by the sound insulating material manufacturing.

The purpose of this utility model is to provide a kind of small-sized DC permanent magnetism steady speed motor, and it has good technical performance and promptly has high speed stabilizing, high life, characteristics such as low vibration, low noise and low radiation, can be applicable to hoot device fully.

For achieving the above object, the solution that the utility model is taked is: a kind of small-sized DC permanent magnetism steady speed motor, it contains one and is made by metal material, be shaped as the hollow tubular body at a band end and have a shell that installs to the permanent magnet on the perimeter surface in it regularly, also contain a rotor that constitutes by armature and commutator, with one engage and have with the brush of this commutator sliding contact with the openend of this shell and be electrically connected to the cap of the input terminal on this brush, the preposition ring varistor of this commutator, at this commutator face calendering one deck silver-cadmium alloy film, at this surface of the electric brush calendering one deck silver palladium alloy film, it is characterized in that in cap, also serving as a contrast with cushion blocking, a kind of spherical oiliness bearing is embedded in outer cover port and another kind of spherical oiliness bearing is embedded in rotatably mounted this rotor in plastics inner end cap center, in the circuit of motor, also has a speed stabilizing plate, the circuit of this speed stabilizing plate comprises speed stabilizing piece IC, 1 pin of this speed stabilizing piece IC, 2 pin, 3 pin close mutually, and 4 pin connect capacitor C ₁Negative pole and triode BG emitter, 5 pin connecting resistance R ₃, ring varistor RM, capacitor C among the motor M ₂Anodal, thermistor R ₂, capacitor C ₁Anodal connecting resistance R ₃The other end, capacitor C ₂Minus earth, 7 pin ground connection, 8 pin connect negative pole, the resistance R of motor M ₁, resistance R ₁Another termination triode BG base stage, triode BG collector electrode meets thermistor R ₂The A end of the other end, potentiometer W and C end, the B terminating resistor R of potentiometer W ₄, resistance R ₄Another termination triode BG base stage.

Outside shell, also enclose with shielding ring.

Make permanent magnet with the orthotype silicon strip.

The utility model compared with prior art has following characteristics:

1, adopt spherical oiliness bearing to be embedded in outer cover port and plastics inner end cap center, because a kind of abrim high temperature is non-volatile in this bearing arrangement hole, low temperature does not solidify, the lubricating oil of greasy property excellence, and the bearing sphere touches area for minimum with being coupling, thereby can cooperate with the rotor main shaft high accuracy, such cooperation can be adjusted the center automatically, eliminate machine error effectively, can guarantee product quality effectively, can on technology, satisfy batch production requirement well again.

2, the Circuit Design in the built-in speed stabilizing plate of motor, this speed stabilizing plate has temperature compensation function, and has the interference function of anti-mains voltage variations and clutter, can guarantee the stability of motor operation all the time.

3, at the preposition ring varistor of commutator, the effect of this resistance is to filter the high impulse ripple, prevents that circuit from disturbing, thereby increases the useful life of commutator.

4, at commutator face calendering one deck silver-cadmium alloy film, improve its evenness, anti-wear performance and useful life; At surface of the electric brush calendering one deck silver palladium alloy film, improve its electric conductivity, anti-wear performance and useful life.

5, selected for use the orthotype silicon strip as permanent magnet, and carried out magnetic screen with shielding ring, the magnetic width of cloth has been penetrated (being leakage field) and be reduced to bottom line in the shell periphery.

6, at the cap back boxing with cushion blocking, this cushion blocking not only has the function that reduces to vibrate, and suppresses anti noise in addition.

7, owing to taked technique scheme, reached 1500 hours useful life of the present utility model, exceeded 1000 hours requirement of international regulation.

Below in conjunction with embodiment and accompanying drawing thereof the utility model is remake description.

Fig. 1 is the structural representation of present embodiment.

Fig. 2 is the circuit electrical schematic diagram of speed stabilizing plate in the present embodiment.

In Fig. 1: 1, speed stabilizing plate, 2, the plastics inner end cap, 3, shell, 4, commutator, 5, shielding ring, 6, permanent magnet, 7, rotor, 8, spherical oiliness bearing, 9, armature, 10, ring varistor, 11, brush, 12, input terminal, 13, cushion blocking, 14, spherical oiliness bearing, 15, cap.

As shown in Figure 1, present embodiment contain one that make by metal material, be shaped as the hollow tubular body at a band end and have a shell 3 that installs to the permanent magnet on the perimeter surface 6 in it regularly, also contain a rotor 7 that constitutes by armature 9 and commutator 4 and openend and engage and have with the brush 11 of this commutator 4 sliding contacts and be electrically connected to the cap 15 of the input terminal 10 on this brush 11 with this shell 3; These commutator 4 preposition ring varistors 10, at these commutator 4 surface calendering one deck silver-cadmium alloy films, at these brush 11 surface calendering one deck silver palladium alloy films, it is characterized in that also serving as a contrast with cushion blocking 13 15 li of caps, a kind of spherical oiliness bearing 8 is embedded in shell 3 ports and another kind of spherical oiliness bearing 14 is embedded in rotatably mounted this rotor 7 in plastics inner end cap 2 centers, also has a speed stabilizing plate 1 in the circuit of motor.

As shown in Figure 2, the circuit of this speed stabilizing plate 1 comprise speed stabilizing piece IC ↓, this speed stabilizing piece IC ↓ 1 pin, 2 pin, 3 pin close mutually, 4 pin connect capacitor C ↓ 1 negative pole and triode BG ↓ emitter, 5 pin connecting resistance R ↓ 3, motor M ↓ in ring varistor RM ↓, capacitor C ↓ 2 positive poles, thermistor R ↓ 2, the other end of anodal connecting resistance R ↓ 3 of capacitor C ↓ 1, capacitor C ↓ 2 minus earths, 7 pin ground connection, 8 pin connect motor M ↓ negative pole, resistance R ↓ 1, another termination triode BG ↓ base stage of resistance R ↓ 1, triode BG ↓ collector electrode connects thermistor R ↓ 2 other ends, potentiometer W ↓ A end and C hold, B terminating resistor R ↓ 4 of potentiometer ↓ W, another termination triode BG ↓ base stage of resistance R ↓ 4.

As shown in Figure 1, outside shell 3, also enclose with shielding ring 5.

Make permanent magnet 6 with the orthotype silicon strip.

Claims (3)

1, a kind of DC permanent magnet steady speed motor, it contains one and is made by metal material, be shaped as the hollow tubular body at a band end and have a shell (3) that installs to the permanent magnet (6) on the perimeter surface in it regularly, also contain a rotor (7) that constitutes by armature (9) and commutator (4), with one engage and have with the brush (11) of this commutator (4) sliding contact with the openend of this shell (3) and be electrically connected to the cap (15) of the input terminal (10) on this brush (11), the preposition ring varistor of this commutator (4) (10), at this commutator (4) surface calendering one deck silver-cadmium alloy film, at this brush (11) surface calendering one deck silver palladium alloy film, it is characterized in that: also serve as a contrast with cushion blocking (13) in cap (15) lining, a kind of spherical oiliness bearing (8) is embedded in shell (3) port and another kind of spherical oiliness bearing (14) is embedded in plastics inner end cap (2) rotatably mounted this rotor in center (7), in the circuit of motor, also has a speed stabilizing plate (1), the circuit of this speed stabilizing plate (1) comprise speed stabilizing piece IC ↓, this speed stabilizing piece IC ↓ 1 pin, 2 pin, 3 pin close mutually, 4 pin connect capacitor C ↓ [1] negative pole and triode BG ↓ emitter, 5 pin connecting resistance R ↓ [3], motor M ↓ in ring varistor RM ↓, capacitor C ↓ [2] positive pole, thermistor R ↓ [2], the other end of anodal connecting resistance R ↓ [3] of capacitor C ↓ [1], capacitor C ↓ [2] minus earth, 7 pin ground connection, 8 pin connect motor M ↓ negative pole, resistance R ↓ [1], another termination triode BG ↓ base stage of resistance R ↓ [1], triode BG ↓ collector electrode connects thermistor R ↓ [2] other end, potentiometer W ↓ A end and C hold, B terminating resistor R ↓ [4] of potentiometer ↓ W, another termination triode BG ↓ base stage of resistance R ↓ [4].

2, a kind of DC permanent magnet steady speed motor according to claim 1 is characterized in that: also enclose with shielding ring (5) outside shell (3).

3, a kind of DC permanent magnet steady speed motor according to claim 1 is characterized in that: make permanent magnet (6) with the orthotype silicon strip.