CN214380543U

CN214380543U - Motor commutator with air duct

Info

Publication number: CN214380543U
Application number: CN202120640718.2U
Authority: CN
Inventors: 王洋村; 许维波
Original assignee: Ningbo Fengyang General Electromechanical Co ltd
Current assignee: Ningbo Fengyang General Electromechanical Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-10-08
Anticipated expiration: 2031-03-30

Abstract

The utility model discloses a motor commutator with wind channel, include the switching-over subassembly that encloses into the tube-shape by a plurality of commutator segments interval arrangement, the fixed setting of switching-over subassembly is in the side of the cylindrical installation section of thick bamboo, the installation section of thick bamboo is inside to be provided with the installation cavity, be provided with the fixed axle of tube-shape in the installation cavity, the installation section of thick bamboo and fixed axle coaxial arrangement, and the installation section of thick bamboo is fixed with the fixed axle through a plurality of support piece, a plurality of support piece are evenly distributed around the axle center of fixed axle, form the wind channel between two adjacent support piece, the front end of fixed axle is fixed and is provided with the closing cap, the closing cap has seted up the ventilation hole, ventilation hole and wind channel one-to-one; the advantage is provided with support piece between installation section of thick bamboo and fixed axle, is formed with the wind channel between the support piece, can accelerate the air convection in the motor casing through setting up in wind channel, reduces the convection current and hinders, can improve the heat-sinking capability of motor when to the commutator heat dissipation, further improves the life of motor, reduces the ageing phenomenon of accelerating that leads to because of the high temperature.

Description

Motor commutator with air duct

Technical Field

The utility model relates to a commutator field, concretely relates to motor commutator with wind channel.

Background

Motors are widely used in various fields as an execution unit that converts electric energy into mechanical electric energy and outputs the mechanical electric energy. The motor mainly comprises a shell, an electric brush, a stator and a rotor, wherein the electric brush, the stator and the rotor are all arranged in the shell. Because the motor needs to convert the electric energy into the mechanical energy and therefore needs to convey the current to the coil of the rotor through the electric brush, the rotor is driven to rotate through the action of electromagnetic force, a commutator is usually arranged at the front end of the rotor for realizing the continuation of the current in the coil, the continuation of the current is realized through the cooperation of the commutator and the electric brush, and stable electromagnetic force is provided. The motor can lead to the inside temperature of motor to rise because the effect of load in the course of the work, and the accumulation of long-time work heat also can lead to the temperature rise in the casing equally, and the inside temperature rise of motor can influence the performance of motor, and ageing-accelerating can lead to the insulating varnish on the coil to age with higher speed and drop even, causes the condition of a fire even when serious. In order to cool the motor, the conventional method is to provide ventilation holes at both ends or the side surface of the housing to cool the motor. However, the commutator is located between the two ends of the housing, so that the motor cannot form an air duct in the housing, and the ventilation effect is greatly reduced, and therefore, the motor commutator with the air duct is needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the motor commutator with the air duct is simple in structure, reliable to use and good in ventilation effect.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a motor commutator with wind channel, includes the commutator segment, a plurality of commutator segment interval arrangements enclose the switching-over subassembly of wound tube-shape, the fixed side that sets up at cylindrical installation section of thick bamboo of switching-over subassembly, the inside installation cavity that is provided with of installation section of thick bamboo, the installation cavity in be provided with the fixed axle of tube-shape, installation section of thick bamboo and the coaxial setting of fixed axle, just installation section of thick bamboo fixed mutually through a plurality of support piece and fixed axle, a plurality of support piece around the axle center evenly distributed of fixed axle, two adjacent support pieces between form the wind channel, the front end of fixed axle fixed be provided with the closing cap, the closing cap seted up the ventilation hole, ventilation hole and wind channel one-to-one.

Furthermore, the supporting piece and the fixing shaft are integrally formed, and the supporting piece is arranged on the outer side surface of the fixing shaft along the length direction of the fixing shaft.

Furthermore, the length of the supporting piece is smaller than that of the fixing shaft, and the front end of the supporting piece is flush with that of the fixing shaft.

Furthermore, a dustproof net is arranged between the fixed shaft and the mounting cylinder and is positioned at the rear end part of the fixed shaft; the advantage lies in that the dust screen can play filterable effect, avoids debris such as dust to enter into the rotor through the ventilation hole in, further improves the reliability of commutator and motor.

Furthermore, the radial cross-sectional area of the vent hole is smaller than that of the air duct; the advantage lies in, the sectional area is not the same can form the pressure differential under the high-speed circumstances of rotating, and then forms the air current, improves the heat-sinking capability.

Furthermore, the front end face of the mounting cylinder is provided with a positioning groove, the rear end part of the sealing cover is embedded into the positioning groove, the sealing cover is fixed with the mounting cylinder through a plurality of bolts, and the plurality of bolts are uniformly distributed around the axis of the sealing cover.

Compared with the prior art, the utility model has the advantages that be provided with support piece between installation section of thick bamboo and fixed axle, be formed with the wind channel between the support piece, can accelerate the air convection in the motor casing through setting up in wind channel, reduce the convection current and hinder, can improve the heat-sinking capability of motor in to the commutator radiating, further improve the life of motor, reduce the ageing phenomenon with higher speed that leads to because of the high temperature. And a plurality of supporting pieces are uniformly distributed around the peripheral axis of the fixed shaft, so that the phenomenon that one side of the commutator is heavier can be avoided, and the phenomenon that the rotor shakes due to the fact that one side of the commutator is heavier during working is reduced.

Drawings

Fig. 1 is one of the overall structural diagrams of the present invention;

fig. 2 is a second schematic view of the overall structure of the present invention;

fig. 3 is a top view of the present invention;

FIG. 4 is a schematic cross-sectional view taken along A-A of FIG. 3;

fig. 5 is a schematic cross-sectional view taken along line B-B of fig. 3.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

A motor commutator with an air duct 9 comprises commutator segments 2 made of copper materials, a plurality of commutator segments 2 are arranged at intervals to surround a cylindrical commutator assembly 1, an insulating sheet 3 made of mica sheets is arranged between every two adjacent commutator segments 2, the commutator assembly 1 is fixedly arranged on the side surface of a cylindrical mounting barrel 4, a mounting cavity 8 is arranged in the mounting barrel 4, a cylindrical fixing shaft 5 is arranged in the mounting cavity 8, the mounting barrel 4 and the fixing shaft 5 are coaxially arranged, the mounting barrel 4 is fixed with the fixing shaft 5 through 8 supporting pieces 10, the 8 supporting pieces 10 are uniformly distributed around the axis of the fixing shaft 5, the air duct 9 is formed between the two adjacent supporting pieces 10, the supporting pieces 10 and the fixing shaft 5 are integrally formed, the supporting pieces 10 are arranged on the outer side surface of the fixing shaft 5 along the length direction of the fixing shaft 5, the length of the supporting pieces 10 is smaller than that of the fixing shaft 5, and the front ends of the supporting pieces 10 are flush with the front end of the fixing shaft 5, therefore, a mounting groove 11 may be formed at a rear end portion between the fixed shaft 5 and the mounting tube 4, a dust screen 12 may be disposed between the fixed shaft 5 and the mounting tube 4, and the dust screen 12 may be fixedly disposed in the mounting groove 11.

The front end of the fixed shaft 5 is fixedly provided with a sealing cover 6, the sealing cover 6 is provided with vent holes 7, the vent holes 7 are in one-to-one correspondence with the air ducts 9, and the radial cross-sectional areas of the vent holes 7 are smaller than the cross-sectional areas of the air ducts 9. The constant head tank has been seted up to the preceding terminal surface of installation section of thick bamboo 4, and in the rear end embedding constant head tank of closing cap 6, closing cap 6 was fixed mutually with installation section of thick bamboo 4 through 3 bolts, 3 bolts around the axis evenly distributed of closing cap 6.

The utility model discloses a working process does, because the output shaft of motor and fixed axle 5 are to fixed, consequently when the electromagnetic force is used for driving the rotor to rotate on the rotor, the commutator rotates along with the rotor is synchronous, this moment because the cross-section in ventilation hole 7 is less than the cross-section in wind channel 9, when the commutator rotates fast, because the different pressure differentials that form of wind speed through two places, consequently can make the air current pass through wind channel 9 and dispel the heat to the commutator, because through-hole (not shown) on the casing can be realized with wind channel 9 to setting up of wind channel 9 realizes the intercommunication, improve the heat-sinking capability of motor, reduce sheltering from of solid commutator to casing both ends through-hole, make the air current slowly lead to the lower problem of radiating efficiency.

The above-described embodiments are only preferred embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes and modifications can be made, which are within the scope of the present invention.

Claims

1. The utility model provides a motor commutator with wind channel, includes the commutator segment, a plurality of commutator segment interval arrangements enclose the switching-over subassembly of wound tube-shape, its characterized in that, the fixed side that sets up at cylindrical installation section of thick bamboo of switching-over subassembly, the inside installation cavity that is provided with of installation section of thick bamboo, the installation cavity in be provided with the fixed axle of tube-shape, installation section of thick bamboo and the coaxial setting of fixed axle, just installation section of thick bamboo fixed with the fixed axle through a plurality of support piece, a plurality of support piece around the axle center evenly distributed of fixed axle, two adjacent support pieces between form the wind channel, the front end of fixed axle fixed be provided with the closing cap, the closing cap seted up the ventilation hole, ventilation hole and wind channel one-to-one.

2. The motor commutator of claim 1, wherein the supporting member is integrally formed with the fixing shaft, and the supporting member is disposed on an outer side of the fixing shaft along a length direction of the fixing shaft.

3. The motor commutator of claim 2 in which the length of the support member is less than the length of the stationary shaft and the front end of the support member is flush with the front end of the stationary shaft.

4. The motor commutator with the air passage as claimed in claim 3, wherein a dust screen is disposed between the fixing shaft and the mounting cylinder, the dust screen being located at a rear end portion of the fixing shaft.

5. The motor commutator of claim 1 in which the radial cross-sectional area of the vent is less than the cross-sectional area of the air passage.

6. The motor commutator with the air duct according to claim 1, wherein the front end surface of the mounting cylinder is provided with a positioning groove, the rear end portion of the sealing cover is embedded into the positioning groove, the sealing cover is fixed with the mounting cylinder through a plurality of bolts, and the plurality of bolts are uniformly distributed around the axis of the sealing cover.