CN208723698U - A kind of Hollow Shaft Transmission permanent magnet synchronous motor - Google Patents

Abstract

The utility model discloses a kind of Hollow Shaft Transmission permanent magnet synchronous motors, including motor case, drive end bearing bracket, rear end cap, stator structure, rotor, hollow shaft and transmission shaft, the drive end bearing bracket and rear end cap are separately mounted to the rear and front end of motor case, the stator structure includes stator core and stator winding, the rotor and hollow shaft phase tight fit, the both ends of the hollow shaft pass through bearing respectively and are mounted in the bearing chamber of drive end bearing bracket and rear end cap, inner gear spline is equipped in the hollow shaft, transmission shaft is arranged in the hollow shaft, external gear spline is arranged between one shaft end of the hollow shaft and transmission shaft, the inner gear spline is meshed with external gear spline.The utility model has the advantage of, the useful space of electric car is made full use of, it is effective to mitigate motor weight, have the characteristics that torque is big, noise is low, good manufacturability, and fast cooling avoids demagnetization, the weak magnetic, the problem that operational efficiency is low, at high cost and narrow speed adjustable range of motor.

Description

A kind of Hollow Shaft Transmission permanent magnet synchronous motor

Technical field

The utility model relates to electric vehicle devices technical field, specially a kind of Hollow Shaft Transmission permanent magnet synchronous motor.

Background technique

With the development of society, electric car is rapidly developed, it has the characteristics that energy-saving and environmental protection；In recent years Driving motor for electric automobile type is developed to from permanent magnet DC motor, AC induction motor and is occupied using permasyn morot More, common feature is all to use rectangular spline connection structure with shaft interface, such traditional structure lacks using solid spindle Falling into is that overall structure is not compact, component weight is big and dynamic noise is big.

Utility model content

The technical problem to be solved by the utility model is to: conventional motors solid spindle is rectangular spline with shaft interface Connection, overall structure is not compact, component weight is big and dynamic noise is big.

In order to solve the above technical problems, the utility model provides the following technical solutions:

A kind of Hollow Shaft Transmission permanent magnet synchronous motor, including motor case, drive end bearing bracket, rear end cap, stator structure, rotor, Hollow shaft and transmission shaft, the drive end bearing bracket and rear end cap are separately mounted to the rear and front end of motor case, the motor case Inner wall and stator mechanism phase tight fit, the stator structure include stator core and stator winding, the both ends of the stator core It is tied with stator winding, the stator core is provided with rotor, the stator core and rotor far from the side of motor case inner wall Between have certain gap, the rotor is mounted on by bearing respectively with hollow shaft phase tight fit, the both ends of the hollow shaft In the bearing chamber of drive end bearing bracket and rear end cap, it is equipped with inner gear spline in the hollow shaft, is arranged with transmission shaft in the hollow shaft, And pass through hollow shaft and be exposed to the outside of drive end bearing bracket and rear end cap, have between the transmission shaft and inner wall of hollow shaft it is certain between Gap is arranged with external gear spline, the inner gear spline and external gear spline between one shaft end of the hollow shaft and transmission shaft It is meshed.

Preferably, the motor case and stator core are using interference fit.

Preferably, the rotor and hollow shaft are using interference fit.

Preferably, the inner gear spline and external gear spline are Involutes Gears Transmission.

Preferably, spiral heat dissipation pipeline is equipped in the motor case, spiral heat dissipation pipeline one end is equipped with water inlet, The other end is equipped with water outlet.

Preferably, the length of the spiral heat dissipation pipeline is greater than the spacing between two stator winding outer walls.

Preferably, the stator winding surrounding is wound with high thermal conductive resin layer.

Preferably, high thermal conductive resin layer side and motor case phase tight fit.

Compared with prior art, the utility model has the beneficial effects that

1. the useful space of electric car is made full use of by the setting of hollow shaft, it is compact-sized, mitigate motor weight.

2. being Involutes Gears Transmission mode by inner gear spline and external gear spline, with torque is big, noise is low, work The good feature of skill；

3. by the setting of spiral heat dissipation pipeline and high thermal conductive resin layer, so that the heat of stator core part and stator winding Amount is quickly taken away by the coolant liquid in spiral heat dissipation pipeline, and the purpose of fast cooling avoids moving back for pure electric vehicle magneto Magnetic, weak magnetic, operational efficiency is low, the big problem at high cost and narrow speed adjustable range of magnetic material dosage.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of Hollow Shaft Transmission permanent magnet synchronous motor of the utility model embodiment；

Fig. 2 is the attachment structure schematic diagram of the utility model embodiment inner gear spline and external gear spline；

In figure: 1- motor case, 11- spiral heat dissipation pipeline, 111- water inlet, 112- water outlet, 2- drive end bearing bracket, the rear end 3- Lid, 4- stator structure, 41- stator core, 42- stator winding, 5- rotor, 6- hollow shaft, 61- inner gear spline, 7- transmission shaft, 8- external gear spline, 9- high thermal conductive resin layer.

Specific embodiment

For convenient for those skilled in the art understand that technical solutions of the utility model, practical new to this now in conjunction with Figure of description Type technical solution is described further.

Refering to fig. 1 to Fig. 2, present embodiment discloses a kind of Hollow Shaft Transmission permanent magnet synchronous motor, including motor case 1, Drive end bearing bracket 2, rear end cap 3, stator structure 4, rotor 5, hollow shaft 6 and transmission shaft 7, the drive end bearing bracket 2 and rear end cap 3 are installed respectively In the rear and front end of motor case 1, inner wall and the 4 phase tight fit of stator structure of the motor case 1, the stator structure 4 are wrapped Include stator core 41 and stator winding 42, the both ends of the stator core 41 are tied with stator winding 42, the stator core 41 in 1 inner wall of motor case matches, and the stator core 41 is provided with rotor 5, the stator far from the side of 1 inner wall of motor case There are certain gap, the rotor 5 and 6 phase tight fit of hollow shaft, the both ends point of the hollow shaft 6 between iron core 41 and rotor 5 It is not mounted on by bearing in the bearing chamber of drive end bearing bracket 2 and rear end cap 3, inner gear spline 61 is equipped in the hollow shaft 6, it is described It is arranged with transmission shaft 7 in hollow shaft 6, and passes through the outside that hollow shaft 7 is exposed to drive end bearing bracket 2 and rear end cap 3, the transmission shaft 7 There is certain gap between 6 inner wall of hollow shaft, external gear flower is arranged between the shaft end and transmission shaft 7 of the hollow shaft 6 Key 8, the inner gear spline 61 are meshed with external gear spline 8.

Further, the motor case 1 is with stator core 41 using interference fit.

Further, the rotor 5 is with hollow shaft 6 using interference fit.

Further, the inner gear spline 61 and external gear spline 8 are Involutes Gears Transmission, have that torque is big, makes an uproar The characteristics of sound is low, good manufacturability.

Further, it is equipped with spiral heat dissipation pipeline 11 in the motor case 1, described 11 one end of spiral heat dissipation pipeline is equipped with Water inlet 111, the other end are equipped with water outlet 112, and the length of the spiral heat dissipation pipeline 11 is greater than two 42 outer walls of stator winding Between spacing, guarantee that the coolant liquid in spiral heat dissipation pipeline 11 can preferably take away the heat of 41 part of stator core, mention High cooling rate.

Further, 42 surrounding of stator winding is wound with high thermal conductive resin layer 9,9 side of high thermal conductive resin layer with 1 phase tight fit of motor case can be by the heat of 42 end of stator winding since high thermal conductive resin layer 9 has higher thermal conductivity It quickly is transferred to motor case 1, heat is equally quickly taken away by the coolant liquid in hot channel 11, and the mesh of cooling is further reached 's.

The working principle of the utility model is: passing through the rotation of rotor 5, since rotor 5 is matched with hollow shaft 6 using interference Conjunction drives hollow shaft 6 to be equipped with inner gear spline 61 in rotation on bearings, hollow shaft 6, and inner gear spline 61 and external gear are spent Key 8 is meshed, so that external gear spline 8 rotates, inner gear spline 61 and external gear spline 8 are Involutes Gears Transmission, has The characteristics of torque is big, noise is low, good manufacturability, and external gear spline 8 is matched with reduction gearbox (not shown), so that reduction gearbox Transmission shaft 7 is driven to rotate；In addition, coolant liquid is delivered to spiral from water inlet 111 by pumping circulation system (not shown) In hot channel 11, motor case 1 is cooled down, and then stator core 41 is cooled down, simultaneously as high thermal conductive resin Layer 9 has higher thermal conductivity, the heat of 42 end of stator winding can be quickly transferred to motor case 1, and dissipate by spiral Coolant liquid in heat pipeline 11 cools down 42 end of stator winding, and further, pumping circulation system (not shown) will Coolant liquid after heat absorption is quickly discharged from water outlet 112, so that heat be taken out of, and re-enters coolant liquid and carries out circulation temperature lowering It is cooling.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein, and should not treat any reference in the claims as limiting Related claim.

Embodiment described above only indicates that the embodiment of utility model, the protection scope of the utility model are not only limited to Above-described embodiment without departing from the concept of the premise utility, can also be made for those skilled in the art Several modifications and improvements, these belong to scope of protection of the utility model.

Claims (8)

1. a kind of Hollow Shaft Transmission permanent magnet synchronous motor, including motor case, drive end bearing bracket, rear end cap, stator structure, rotor, sky Mandrel and transmission shaft, it is characterised in that: the drive end bearing bracket and rear end cap are separately mounted to the rear and front end of motor case, the electricity The inner wall of machine casing and stator mechanism phase tight fit, the stator structure include stator core and stator winding, the stator iron The both ends of core are tied with stator winding, and the stator core is provided with rotor, the stator iron far from the side of motor case inner wall There is certain gap between core and rotor, the rotor passes through axis with hollow shaft phase tight fit, the both ends of the hollow shaft respectively It holds and is mounted in the bearing chamber of drive end bearing bracket and rear end cap, inner gear spline is equipped in the hollow shaft, is arranged in the hollow shaft There is transmission shaft, and pass through the outside that hollow shaft is exposed to drive end bearing bracket and rear end cap, has between the transmission shaft and inner wall of hollow shaft Certain gap, is arranged with external gear spline between a shaft end of the hollow shaft and transmission shaft, the inner gear spline and outer Gear spline is meshed.

2. a kind of Hollow Shaft Transmission permanent magnet synchronous motor according to claim 1, it is characterised in that: the motor case with Stator core is using interference fit.

3. a kind of Hollow Shaft Transmission permanent magnet synchronous motor according to claim 1, it is characterised in that: the rotor with it is hollow Axis is using interference fit.

4. a kind of Hollow Shaft Transmission permanent magnet synchronous motor according to claim 1, it is characterised in that: the inner gear spline It is Involutes Gears Transmission with external gear spline.

5. a kind of Hollow Shaft Transmission permanent magnet synchronous motor according to claim 1, it is characterised in that: in the motor case Equipped with spiral heat dissipation pipeline, spiral heat dissipation pipeline one end is equipped with water inlet, and the other end is equipped with water outlet.

6. a kind of Hollow Shaft Transmission permanent magnet synchronous motor according to claim 5, it is characterised in that: the spiral radiator The length in road is greater than the spacing between two stator winding outer walls.

7. a kind of Hollow Shaft Transmission permanent magnet synchronous motor according to claim 1, it is characterised in that: the stator winding four It is wound with high thermal conductive resin layer week.

8. a kind of Hollow Shaft Transmission permanent magnet synchronous motor according to claim 7, it is characterised in that: the high thermal conductive resin Layer side and motor case phase tight fit.