CN211351907U

CN211351907U - Force feedback brushless external rotor motor

Info

Publication number: CN211351907U
Application number: CN201922110636.2U
Authority: CN
Inventors: 周峰; 罗永鸿; 闫鲲
Original assignee: Shenzhen Power Motor Industrial Co Ltd
Current assignee: Shenzhen Power Motor Industrial Co Ltd
Priority date: 2019-11-30
Filing date: 2019-11-30
Publication date: 2020-08-25
Anticipated expiration: 2029-11-30

Abstract

The utility model provides a force feedback brushless external rotor motor, which comprises a motor shaft, a rotor bracket sleeved on the motor shaft, a rotor sleeved outside the motor shaft and connected with the rotor bracket, a stator, a heat dissipation end cover sleeved on the motor shaft and contacted with the inner wall of the stator, and a first bearing and a second bearing sleeved on the motor shaft and respectively connected with two ends of the heat dissipation end cover; the rotor comprises a rotor cup connected with the rotor support and a plurality of magnets adhered to the inner wall of the rotor cup. The motor of the utility model is not provided with the carbon brush and the current collecting ring of the direct current motor; the rotor only comprises a rotor cup and a magnet, and the structure of the rotor is simple; the utility model can not influence the whole service life of the product due to the wear failure of the carbon brush and the current collecting ring; the utility model discloses reliable operation under adverse circumstances such as high temperature, vibrations, impact when the motor is fit for the product operation.

Description

Force feedback brushless external rotor motor

Technical Field

The utility model belongs to the technical field of the motor, especially, relate to a brushless external rotor electric machine of force feedback.

Background

The existing force feedback motor structure is usually a small direct current motor, a gear box assembly is installed, speed reduction is carried out through a gear box speed reduction mechanism, and output torque is increased. The motor has the advantages of complex structure, more parts, complex manufacturing process and higher manufacturing cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a brushless external rotor electric machine of force feedback that production efficiency is high, long service life.

The utility model provides a force feedback brushless external rotor motor, which comprises a motor shaft, a rotor bracket sleeved on the motor shaft, a rotor sleeved outside the motor shaft and connected with the rotor bracket, a stator, a heat dissipation end cover sleeved on the motor shaft and contacted with the inner wall of the stator, and a first bearing and a second bearing sleeved on the motor shaft and respectively connected with two ends of the heat dissipation end cover; the rotor comprises a rotor cup connected with the rotor support and a plurality of magnets adhered to the inner wall of the rotor cup.

Preferably, the rotor bracket comprises a bracket main body with a fixing hole inside, a fixing ring extending downwards and sleeved on the motor shaft, and a clamping ring extending downwards from the outer side of the bracket main body; the snap ring is clamped on the inner wall of the rotor cup.

Preferably, the plurality of magnets are located below the snap ring of the spider.

Preferably, the motor shaft is provided with a T-shaped thread above the armature support.

Preferably, both ends of the T-shaped thread are provided with vertical planes perpendicular to the surface of the motor shaft.

Preferably, the stator comprises a stator punching sheet, a plurality of motor windings positioned in the stator punching sheet, a first insulating sheet fixed at one end of the stator punching sheet and sleeved at one ends of the plurality of motor windings, a second insulating sheet positioned at the other end of the stator punching sheet and sleeved at the other end of the motor windings, and glue embedded in a gap between the stator punching sheet and the motor windings; the glue also covers the first insulating sheet and the second insulating sheet.

Preferably, the heat dissipating end cap includes a base and a mounting seat connected to a center of the base and inserted into an inside of the stator.

Preferably, the mounting seat is provided with a plurality of heat dissipation grooves which are positioned between the outer wall and the inner wall of the mounting seat and are circularly arranged.

Preferably, the base is provided with a plurality of first heat dissipation grooves arranged around the mounting seat and a plurality of second heat dissipation grooves arranged around the outer sides of the plurality of first heat dissipation grooves.

The force feedback brushless external rotor motor of the utility model is not provided with the carbon brush and the current collecting ring of the direct current motor; the rotor only comprises a rotor cup and a magnet, and the structure of the rotor is simple; the utility model can not influence the whole service life of the product due to the wear failure of the carbon brush and the current collecting ring; the utility model discloses reliable operation under adverse circumstances such as high temperature, vibrations, impact when the motor is fit for the product operation.

Drawings

Fig. 1 is an internal cross-sectional view of the motor of the present invention;

FIG. 2 is a schematic structural view of the motor shown in FIG. 1;

FIG. 3 is a schematic view of a rotor support of the motor of FIG. 1;

FIG. 4 is a schematic structural view of a rotor cup of the motor shown in FIG. 1;

FIG. 5 is a schematic view of a stator of the motor shown in FIG. 1;

FIG. 6 is a schematic diagram of the glue configuration of the stator shown in FIG. 5;

FIG. 7 is a schematic view of the stator shown in FIG. 5 with the glue removed;

fig. 8 is a schematic structural view of a heat dissipation end cap of the motor shown in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The utility model discloses a force feedback brushless external rotor electric machine, it is direct drive formula force feedback rotor brushless electric machine.

As shown in fig. 1 and 2, the force feedback brushless external rotor motor includes a motor shaft 10, a rotor bracket 20 sleeved on the motor shaft 10, a rotor sleeved outside the motor shaft 10 and connected to the rotor bracket 20, a stator 40 disposed opposite to the rotor, a heat dissipation end cap 60 sleeved on the motor shaft 10 and connected to an inner wall of the stator 40, a first bearing 71 and a second bearing 72 sleeved on the motor shaft 10 and respectively connected to two ends of the heat dissipation end cap 60, and a spacer 80 and a snap spring 90 sleeved on the motor shaft 10.

As shown in fig. 3 and 4, the rotor bracket 20 includes a bracket main body 21 having a fixing hole 211 therein, a fixing ring 22 extending downward from the fixing hole 211 and fitted over the motor shaft 10, and a snap ring 23 extending downward from the outside of the bracket main body 21.

The rotor includes a rotor cup 30 coupled to the snap ring 23 of the rotor frame 20 and a plurality of magnets 50 adhered to an inner wall of the rotor cup 30. Wherein, the rotor cup 30 is circular, and the snap ring 23 of the rotor bracket 20 is clamped on the inner wall of the rotor cup 30. In motion, the rotor bracket 20 is moved by the rotation of the motor shaft 10, and the rotor cup 30 and the magnet 50 are moved together by the movement of the rotor bracket 20, thereby realizing the movement of the rotor.

During assembly, the snap ring 23 of the rotor holder 20 is clamped and connected to the inner wall of the rotor cup 30 by a clamping device (not shown), the assembly formed by the rotor holder 20 and the rotor cup 30 is rotated into the motor shaft 10, and the fixing ring 22 of the rotor holder 20 is sleeved on the motor shaft 10.

Magnet 50 is neodymium iron boron magnetic steel; the plurality of magnets 50 are sequentially contacted and surrounded to form a circle, and the plurality of magnets 50 are positioned below the snap ring 23 of the rotor holder 30. A plurality of magnets 50 are bonded in the inner cavity of the rotor cup 30, and the magnets 50 bonded to the rotor cup 30 and the rotor cup 30 constitute a rotor.

The motor shaft 10 is provided with a T-shaped thread 11 above the rotor holder 20, and both ends of the T-shaped thread 11 are provided with vertical planes (not shown) perpendicular to the surface of the motor shaft 10. When the motor shaft rotates in the axial direction at low speed, the vertical plane can be precisely limited and controlled.

Magnet 50 is neodymium iron boron magnetic steel; the plurality of magnets 50 are sequentially contacted and surrounded to form a circle, the plurality of magnets 50 are adhered in the inner cavity of the rotor cup 30, and the magnets 50 adhered to the rotor cup 30 and the rotor cup 30 form a rotor.

As shown in fig. 5 to 7, the stator 40 includes a stator punching sheet 41, a plurality of motor windings 42 located in the stator punching sheet 41, a first insulation sheet 43 fixed at one end of the stator punching sheet 41 and sleeved at one end of the plurality of motor windings 42, a second insulation sheet 42 located at the other end of the fixed stator punching sheet 41 and sleeved at the other end of the motor windings 42, and a glue 45 filled in a gap between the stator punching sheet 41 and the motor windings 42, wherein the glue 45 further covers the first insulation sheet 43 and the second insulation sheet 44. The stator 40 does not change other structures of the stator 40 on the basis of only increasing the cost of the potting adhesive 45. The stator 40 of the pouring sealant can effectively dissipate heat in time through the heat-conducting substances to cool the motor, so that the use efficiency of the stator is increased, and the service life of the motor stator is prolonged.

As shown in fig. 8, the heat radiating end cap 60 includes a base 61 and a mounting seat 62 connected to the center of the base 61 and inserted into the stator 40; the mounting seat 62 is annular, a mounting hole 621 penetrating the base 61 and the mounting seat 62 is formed in the mounting seat 62, and the stator 40 is fixed in the mounting hole 621.

The mounting seat 62 is provided with a plurality of heat dissipation grooves 622 between the outer wall and the inner wall thereof in a circular arrangement. In this embodiment, there are 24 heat dissipation grooves 622, and the 24 heat dissipation grooves 622 are surrounded to form a circle. The heat dissipation groove 622 is disposed at one side where the stator punching sheet 41 is installed, the depth of the heat dissipation groove 622 in the installation seat 62 is 25 mm-35 mm (preferably 30mm), the heat dissipation groove 622 is formed by opening one end of the installation seat 62 towards the direction of the base 61, and the heat dissipation groove 622 does not penetrate through the installation seat 20.

The heat dissipation grooves 622 of the mounting seat 62 increase the heat dissipation area, so that the temperature of the motor is raised and lowered.

The base 61 is provided with a plurality of first heat dissipation grooves 611 arranged around the mounting base 62 and a plurality of second heat dissipation grooves 612 arranged around the outer sides of the plurality of first heat dissipation grooves 611; the first heat dissipation grooves 611 and the second heat dissipation grooves 612 penetrate through the base 61.

Wherein a plurality of first heat dissipation grooves 611 are provided around the mount 62; the plurality of second heat dissipation grooves 612 are disposed around a portion of the plurality of first heat dissipation grooves 611.

The heat radiating end cap 60 is fitted into the inner wall of the stator 40 to thereby form a stator having a heat radiating function. The heat dissipating end cap 60 is fixed to the electronic spindle 10 by a first bearing 71 and a second bearing 72.

The heat dissipation end cover 60 is provided with a plurality of heat dissipation grooves, a plurality of first heat dissipation grooves and a plurality of second heat dissipation grooves, so that the heat dissipation area of the motor can be increased, heat can be effectively dissipated out in time to cool the motor, the service efficiency of the motor is increased, and the service life of the motor is prolonged.

After the heat sink end cap 60 and the stator 40 are fixed to the motor shaft 10, the spacer 80 and the clamp spring 90 are placed on the heat sink end cap 60 and axially moved on the motor shaft 10.

When the brushless external rotor motor works, the stator winding 42 is electrified to establish a magnetic field, a magnetic field rotating around the geometric axis of the motor is formed around the coil of the stator winding 42 by changing the alternating frequency and the waveform of a current wave input to the stator winding 42, the magnetic field drives the magnet 50 of the rotor to rotate, and the force feedback brushless external rotor motor runs.

The force feedback brushless external rotor motor of the utility model is not provided with the carbon brush and the current collecting ring of the direct current motor, and the rotor is not provided with the winding and the magnetic steel, so the whole structure is simple; the rotor only comprises a rotor cup and a magnet, and the structure of the rotor is simple; the manufacturing process of the utility model is very simple, brushless control is adopted, the whole service life of the product is not influenced due to the abrasion failure of the carbon brush and the current collecting ring, and the efficiency is high and the reliability is good; the utility model discloses reliable operation under adverse circumstances such as high temperature, vibrations, impact when the motor is fit for the product operation.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description in any form, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment of the above embodiments without departing from the scope of the present invention.

Claims

1. A force feedback brushless outer rotor motor is characterized by comprising a motor shaft, a rotor support sleeved on the motor shaft, a rotor sleeved outside the motor shaft and connected with the rotor support, a stator, a heat dissipation end cover sleeved on the motor shaft and contacted with the inner wall of the stator, and a first bearing and a second bearing sleeved on the motor shaft and respectively connected with two ends of the heat dissipation end cover; the rotor comprises a rotor cup connected with the rotor support and a plurality of magnets adhered to the inner wall of the rotor cup.

2. The force-feedback brushless external rotor electric machine according to claim 1, wherein: the rotor bracket comprises a bracket main body, a fixing ring and a clamping ring, wherein the bracket main body is internally provided with a fixing hole, the fixing ring extends downwards and is sleeved on the motor shaft, and the clamping ring extends downwards to the outer side of the bracket main body; the snap ring is clamped on the inner wall of the rotor cup.

3. The force-fed brushless external rotor electric machine of claim 2, wherein: the plurality of magnets are located below the snap ring of the spider.

4. The force-fed brushless external rotor electric machine of claim 2, wherein: the motor shaft is provided with T-shaped threads located above the rotor support.

5. The force-fed brushless external rotor electric machine of claim 4, wherein: and the two ends of the T-shaped threads are provided with vertical planes perpendicular to the surface of the motor shaft.

6. The force-feedback brushless external rotor electric machine according to claim 1, wherein: the stator comprises a stator punching sheet, a plurality of motor windings positioned in the stator punching sheet, a first insulating sheet which is fixed on one end of the stator punching sheet and sleeved on one ends of the plurality of motor windings, a second insulating sheet which is positioned on the other end of the stator punching sheet and sleeved on the other end of the motor windings, and glue for encapsulating a gap between the stator punching sheet and the motor windings; the glue also covers the first insulating sheet and the second insulating sheet.

7. The force-feedback brushless external rotor electric machine according to claim 1, wherein: the heat dissipation end cover comprises a base and a mounting seat which is connected with the center of the base and is inserted into the stator.

8. The force-fed brushless external rotor electric machine of claim 7, wherein: the mounting seat is provided with a plurality of heat dissipation grooves which are positioned between the outer wall and the inner wall of the mounting seat and are circularly arranged.

9. The force-fed brushless external rotor electric machine of claim 7, wherein: the base is equipped with the setting and is in a plurality of first radiating grooves around the mount pad and enclose and establish a plurality of second radiating grooves in a plurality of first radiating grooves outside.