CN206547029U - A kind of metal brush carrier injection molding motor - Google Patents

Abstract

The technical solution of the utility model is a kind of metal brush carrier injection molding motor, including motor plastic end cover, rotor assembly, casing, magnetic shoe, conducting strip, brush carrier, spring and brush are provided with the motor plastic end cover, the brush carrier is metal brush carrier, brush carrier uses single injection-molded as inserts and motor plastic end cover, and the magnetic shoe is fixed in casing by the form inserting of inserted sheet.The problem of plastics brush carrier expands with heat and contract with cold before the utility model is solved, can allow the gap of brush and brush carrier suitably to reduce, it is possible to reduce bounce of the brush in brush carrier, reduce the noise of motor, the heat transfer of brush can be accelerated, the service life of brush is improved, after metal brush carrier, the sectional area of brush than originally improves more than 40%, length increase by more than 30%, substantially increases the life-span of motor, is fixed additionally by ultrasonic bonding, technique is simple, and fixed form is reliable and stable.

Description

A kind of metal brush carrier injection molding motor

Technical field

The utility model is related to a kind of motor, more particularly, to a kind of metal brush carrier injection molding motor.

Background technology

Brush is widely used in various double current generators, synchronous motor, storage battery dc motor, crane motor current collection Ring, various electric welding machine etc..By spring handle, it is pressed in rotating shaft brush in brush carrier, when motor is rotated, electricity Electric energy is conveyed to coil by brush by phase changer, therefore brush is the critical component in motor.At present, brush carrier is typically and motor side Separately manufactured or integrated injection molding is covered, separately manufactured cost is very high, process cumbersome, it has not been convenient to during motor manufacturing Installation, and easily produce noise；And brush carrier and electric motor end cap integrated injection molding, such benefit be it is easily manufactured, into This is low, but has a problem that, exactly when motor is running at high speed, can produce substantial amounts of heat, easily causes plastic bruss Hold heated, brush carrier, which expands with heat and contract with cold, produces the change of inside dimension, easily blocks brush, causes motor inoperative, while motor exists Brush can be caused to be in the condition of high temperature when running at high speed, the brush of high temperature has the risk for melting plastics brush carrier.

Utility model content

In view of the above-mentioned problems, the utility model provides a kind of metal brush carrier injection molding motor, plastics before solving The problem of brush carrier expands with heat and contract with cold, can allow the gap of brush and brush carrier suitably to reduce, it is possible to reduce brush is in brush carrier Bounce, reduce motor noise, the heat transfer of brush can be accelerated, the service life of brush is improved, using metallic brush After holding, the sectional area of brush improves more than 40% than original, and length increase by more than 30% substantially increases the life-span of motor, separately Fixed outside by integrated injection molding, technique is simple, and fixed form is reliable and stable.

The technical solution of the utility model is a kind of metal brush carrier injection molding motor, including motor plastic end cover, rotor Conducting strip, brush carrier, spring and brush are provided with component, casing, magnetic shoe, the motor plastic end cover, the brush carrier is metal Brush carrier, brush carrier uses single injection-molded as inserts and motor plastic end cover, and the magnetic shoe is inserted solid by the form of inserted sheet It is scheduled in casing.

It is preferred that, rotary shaft one end of the rotor assembly is arranged on motor plastic end cover by ball bearing and bearing holder (housing, cover) At inwall central recess, the rotary shaft other end of the rotor assembly is arranged on the center of casing by ball bearing and bearing holder (housing, cover) In hole, rotary shaft end is passed outside casing.

It is preferred that, the casing mounting surface is along the circumferential direction evenly equipped with the lug stretched out, the lug and is provided with Rivet hole and rivet, the motor plastic end cover is corresponding with casing mounting surface and is provided with the rivet hole being adapted with rivet.

It is preferred that, the spring is nest spring.

It is preferred that, the casing thickness is 2mm.

The problem of plastics brush carrier expands with heat and contract with cold before the utility model is solved, can make it that the gap of brush and brush carrier can Suitably to reduce, it is possible to reduce bounce of the brush in brush carrier, the noise of motor is reduced, the heat transfer of brush can be accelerated, The service life of brush is improved, after metal brush carrier, the sectional area of brush improves more than 40%, length increase than original More than 30%, the life-span of motor is substantially increased, is fixed additionally by ultrasonic bonding, technique is simple, fixed form is stable can Lean on.

Brief description of the drawings

Fig. 1 is overall structure diagrammatic cross-section of the present utility model；

Fig. 2 is Fig. 1 decomposition texture schematic diagram；

Fig. 3 is the front view of the utility model casing side；

Fig. 4 is motor plastic end cover and the structural representation after brush carrier single injection-molded in the utility model；

Fig. 5 shows the structural representation of a brush for motor plastic end cover part in the utility model；

Wherein：1-motor plastic end cover；2-rotor assembly；3-casing；4-magnetic shoe；5-conducting strip；6-brush carrier； 7-spring；8-brush；9-ball bearing；10-bearing holder (housing, cover)；11-lug；12-rivet.

Embodiment

Below in conjunction with the accompanying drawings, the utility model is described in further detail.

As shown in Figures 1 to 5, a kind of metal brush carrier injection molding motor, including motor plastic end cover 1, rotor assembly 2, Conducting strip 5, brush carrier 6, spring 7 and brush 8 are provided with casing 3, magnetic shoe 4, the motor plastic end cover 1, the brush carrier 6 is gold Belong to brush carrier, brush carrier 6 uses single injection-molded as inserts and motor plastic end cover 1, and the inserting of magnetic shoe 4 is fixed on casing 3 It is interior.Magnetic shoe 4 is arranged in casing 3 using the elastic inserted sheet of high intensity, it is to avoid original because magnetic shoe mounting bracket and motor plastics The disjunctor of end cap 1, rather than gap, leakage field and the vibration be close to casing 3 and produced are the problem of produce noise, improve the effect of motor Rate, it also avoid high temperature during motor operating so that the problems such as the softening and deformation of plastics magnetic shoe support and risk, in addition magnetic shoe The structure of inserted sheet avoids the possibility of magnetic shoe or so activity.

It is preferred that, rotary shaft one end of the rotor assembly 2 is arranged on motor plastics by ball bearing 9 and bearing holder (housing, cover) 10 At the inwall central recess of end cap 1, reinforcement, the rotation of the rotor assembly 2 are provided with the inwall central recess of motor plastic end cover 1 The rotating shaft other end is arranged in the centre bore of casing 3 by ball bearing 9 and bearing holder (housing, cover) 10, and rotary shaft end is passed outside casing 3. From ball bearing 9 and bearing block 10, for oiliness bearing before, the service life of motor is substantially increased, if Put after bearing holder (housing, cover) 10, reduce rotor assembly and slightly shake the resonance produced to rear end cap, reduce the noise of whole motor, together When bearing block 10 damage is produced to bearing when can be prevented effectively from riveter casing tech, and compensate for casing to a certain extent Influence of the nonconcentricity to motor, adds the sealing of motor so that production and assembling motor become more convenient, carry significantly High productivity effect.Reinforcement is set in the bearing installation place of the inwall central recess of motor plastic end cover 1 in addition, to increase electricity The intensity of machine plastic end cover, it is to avoid end cap is damaged in position of bearings.

It is preferred that, the mounting surface of casing 3 is along the circumferential direction evenly equipped with the lug 11 stretched out, the lug 11 and set It is equipped with rivet hole and rivet 12, the motor plastic end cover 1 is corresponding with the mounting surface of casing 3 and is provided with and is adapted with rivet 12 Rivet hole.Increase at motor case and motor plastic end cover when rivet hole is installed and squeeze into rivet so that positioning is more accurate Reliably, it is to avoid the loosening of front and rear casing and influence the sealing of motor.

It is preferred that, the spring 7 is nest spring.Original single armed bungee is changed to nest spring, it is to avoid former spring is easily slided Go out the risk of brush, while avoiding high temperature brush when motor runs at high speed so that becoming inelastic wind after spring arm annealing Danger, it also avoid spring arm and slides limitation brush length in motor rear end, the spring of high temperature during motor operating is it also avoid in addition Melt spring plastics fixed column, cause spring by the risk of card.

It is preferred that, the thickness of casing 3 is 2mm.Casing thickness is changed into 2mm from original 1mm, it is possible to reduce motor Leakage field, is conducive to the performance of motor.

It is described above, only it is better embodiment of the present utility model, not makees any formal limit to utility model System, it is every according to technical principle of the present utility model to any simple modification made for any of the above embodiments, equivalent variations or modification, In the range of still falling within technical solutions of the utility model.

Claims (5)

1. a kind of metal brush carrier injection molding motor, including motor plastic end cover（1）, rotor assembly（2）, casing（3）, magnetic shoe （4）, the motor plastic end cover（1）On be provided with conducting strip（5）, brush carrier（6）, spring（7）And brush（8）, it is characterised in that： The brush carrier（6）For metal brush carrier, brush carrier（6）It is used as inserts and motor plastic end cover（1）Using single injection-molded, the magnetic Watt（4）Casing is fixed on by the form inserting of inserted sheet（3）It is interior.

2. a kind of metal brush carrier injection molding motor according to claim 1, it is characterised in that：The rotor assembly（2） Rotary shaft one end pass through ball bearing（9）With bearing holder (housing, cover)（10）Installed in motor plastic end cover（1）At inwall central recess, institute State rotor assembly（2）The rotary shaft other end pass through ball bearing（9）With bearing holder (housing, cover)（10）Installed in casing（3）Centre bore Interior, rotary shaft end passes casing（3）Outside.

3. a kind of metal brush carrier injection molding motor according to claim 1, it is characterised in that：The casing（3）Install Face is along the circumferential direction evenly equipped with the lug stretched out（11）, the lug（11）Place is provided with rivet hole and rivet（12）, institute State motor plastic end cover（1）With casing（3）Mounting surface is corresponding and is provided with and rivet（12）The rivet hole being adapted.

4. a kind of metal brush carrier injection molding motor according to claim 1, it is characterised in that：The spring（7）For nest Spring.

5. a kind of metal brush carrier injection molding motor according to claim 1, it is characterised in that：The casing（3）Thickness For 2mm.