CN1315245C

CN1315245C - Wheel hub electric machine

Info

Publication number: CN1315245C
Application number: CNB2005100495202A
Authority: CN
Inventors: 鲍炜东; 韦坤兴; 郭金铃
Original assignee: NINGBO JUNTENG INTERNATIONAL INDUSTRY AND TRADE Co Ltd
Current assignee: NINGBO JUNTENG INTERNATIONAL INDUSTRY AND TRADE Co Ltd
Priority date: 2005-03-31
Filing date: 2005-03-31
Publication date: 2007-05-09
Anticipated expiration: 2025-03-31
Also published as: CN1674413A

Abstract

The present invention discloses a hub motor which comprises a motor main casing and a motor cover which are fixed to each other, wherein a main shaft of the shaft center of the hub motor is sheathed with a stator left end cover and a stator right end cover which are fixed to the main shaft, the motor is covered in the stator left end cover and the stator right end cover, a rotor bushing is installed in an iron core of a motor rotor, a roller clutch is arranged between the rotor bushing and a planet speed reducing mechanism, and the roller clutch is composed of a clutch outer ring, a roller retainer, a roller and a reed; the planet speed reducing mechanism is in the two-stage speed reduction mode, and is composed of a driving gear, a planet gear on a planet shaft, a third gear, a carrying gear and an internal gear; the internal gear is fixed to the motor cover so as to realize the power transmission; meanwhile, the motor main casing and the stator left end cover are respectively provided with a synchronous speed measurement mechanism composed of a magnetic element and a Hall sensor. The present invention has the characteristics of small size, light weight, light structure, large transmission moment, low energy consumption, high stability, high speed measurement accuracy, etc.

Description

Wheel hub motor

Technical field

The present invention relates to a kind of motor, the wheel hub motor that especially can drive hub rotates.

Background technology

Electric motor car, advantage such as electric bicycle is pollution-free with it, noiseless, spry and light easy, safe and reliable and cheapness, it is also developed to be widely used, and the heart component of electric motor car, electric bicycle is a wheel hub motor, the motor properties quality will directly influence the performance of electric motor car, electric bicycle, as watt level, speed, climbing capacity or the like, all await further developmental research." electric bicycle with planet gear differential mechanism " disclosed technical scheme of Chinese patent 00253865.2 is to have adopted planetary gears to come the drive hub rotation, make it have to unite to drive by manpower and motor and improve the speed of a motor vehicle, to increase climbing capacity, and motor speed speed no matter, all can arbitrarily import the manpower rotating speed of any size, avoided general electric bicycle when riding, must guarantee manpower rotating speed and the synchronous drawback of motor speed, the overall performance of electric bicycle is improved.But because reasons in structure also has certain defective, bigger as volume, weight is heavier, and carry-over moment is little, and poor work stability or the like awaits further to improve, and does not more have the rotating speed function of considering the synchronous detecting wheel hub motor.

Summary of the invention

Goal of the invention of the present invention is to overcome the defective of prior art and provides that a kind of volume is little, in light weight, carry-over moment is big, energy consumption is low, the stable and reliable operation wheel hub motor is first purpose; It is second purpose that a kind of wheel hub motor with synchronous detecting wheel hub motor rotating speed function is provided simultaneously.

Goal of the invention of the present invention is achieved through the following technical solutions: a kind of wheel hub motor, it comprises motor main casing and the motor cover that is connected mutually, be provided with the main shaft of two ends in its central shaft hole with the bearing supporting, suit stator left end cap and the stator right end cap that is connected with it on the main shaft, by a stator left side, the right end cap spiral-lock in it by the stator that has coil windings, magnet steel, the motor that rotor core is formed, motor power drives the motor main casing and the motor cover that are fixed with one through planetary gear speed reducing mechanism and rotates, it is characterized in that described planetary gear speed reducing mechanism is the secondary planet reducing gear, by the driving gear of movable set on main shaft, the planetary gear on the planet axis of being installed in driving gear engagement, gear III while and the carrier gear coaxial with planetary gear, the internal gear engagement, driving the motor cover and the motor main casing that are connected with internal gear rotates, described rotor core is provided with the rotor bushing that is fixed in the rotor core with the driving gear place of combining, and is provided with the clutch outer shroud with the rotor bushing close-fitting between this rotor bushing and the driving gear, roller rolling retainer, roller, the roller clutch that reed is formed.

Described motor main casing inboard is embedded with the magnetic element of one group of isogonism distribution forming synchronous velocity measurement mechanisms, and the stator left end cap of this magnetic element is provided with Hall element relatively.

Described planet axis and the planetary gear and the gear III that are installed on the planet axis form one group that is connected, and totally three groups are circumference uniform distribution.

Described internal gear is split type internal gear, is made up of four annulus.

Described coil windings is provided with the winding cover in an adjacent side with planetary gear.

Compared with prior art, the present invention has adopted secondary planet reducing gear and roller clutch transmission, be provided with synchronous velocity measurement mechanisms simultaneously, it is little, in light weight to have volume, structure is light and handy, carry-over moment is big, energy consumption is low, good reliability, but the rotating speed of synchronous detecting wheel hub motor, the rate accuracy advantages of higher, the perfect function of wheel hub motor, kept simultaneously by manpower and motor and united driving and the feature of the raising speed of a motor vehicle, thus climbing power can be increased, and avoided the general electric bicycle drawback that the manpower rotating speed must be synchronous with motor speed when riding; Adopted split type inner gear structure, made work simplification, be convenient to make.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the roller clutch structural representation.

Embodiment

Embodiment is described in detail the present invention again below with reference to accompanying drawing.

As Fig. 1-shown in Figure 2, wheel hub motor is formed shell by a motor main casing 5 and a motor cover 18 that is connected mutually by screw, be provided with straight-through main shaft 1 in the symmetrical centre axis hole of shell, its two ends respectively with the bearing in the housing axis hole 4 and lining 3 as supporting, suit stator left end cap 6 and the stator right end cap 12 that is connected with it on the main shaft, be that the stator right end cap links to each other with flat key 21 with main shaft, the stator left end cap is connected with the stator right end cap by screw, makes left and right end cap of stator and main shaft form static connector.Be provided with the motor by omoplate spiral-lock in it in the left and right end cap of stator, the cable that connects motor is by drawing in the main shaft cable hole 2.

Described motor is made up of the stator 8 that has coil windings 7, magnet steel 9, rotor core 10, and the coil windings right side promptly is provided with winding cover 11 with the adjacent side of planetary gear speed reducing mechanism, avoids planetary gear when high speed rotating coil windings to be caused interference.Rotor core 10 1 ends are with the bearing on the main shaft 29 supporting, rotor bushing 27 that is connected by rivet 23 of cover in the other end, and the rotatablely moving of rotor core passes to shell through the secondary planet reducing gear moves ahead wheel.

Described secondary planet reducing gear comprises the driving gear 22 of movable set on main shaft 1, the driving gear right-hand part has tooth, with planetary gear 13 engagements, planetary gear is installed on the planet axis 15 with flat axle, planet axis is bearing in the interior bearing 14 of stator right end cap axis hole, with planetary gear is coaxial mounted gear III17 arranged, the axle head of two gears is all made axial limiting with back-up ring, planet axis 15, planetary gear 13, gear III17 forms one group that is connected, be three groups of circumference uniform distributions altogether, gear III not only with carrier gear 19 engagements at its center but also with internal gear 16 engagements, and internal gear 16 is fixed with one with motor cover 18, is separated by by the pad 24 of nylon or steel plate system on both faying faces.Carrier gear is supporting by the bearing on the stator right end cap 20, and internal gear 16 is split type internal gear, is made up of four annulus, makes work simplification, is convenient to make.Wherein driving gear 22, planetary gear 13, gear III17, carrier gear 19, internal gear 16 are by the powder metallurgy die cast.

The present invention is provided with the roller clutch of being made up of clutch outer shroud 33, roller rolling retainer 30, roller 32, reed 31 28 in the junction, left side of the driving gear 22 of rotor bushing 27 and planetary gear speed reducing mechanism, the clutch outer shroud is connected with the rotor bushing close-fitting, the operation principle of this roller clutch is identical with freewheel clutch, its structure is light and handy, the internal diameter of clutch can be little of 4 millimeters, can bigger optimization overall structure, it is easily manufactured, cost is low, it is big to have carry-over moment simultaneously, noise is low, characteristics such as stable working.After motor starts rotation clockwise, rotor bushing and clutch outer shroud are followed and are clockwise rotated, roller enters narrow raceway, just drive driving gear 22 rotations, power is thus through planetary gear 13, gear III17, internal gear 16

drive motors lid

18,5 rotations of motor main casing, and then the rotation of drive wheel moves ahead vehicle.When motor stops outputting power, the clutch outer shroud stops the rotation, and driving gear is also continuing rotation because of inertia, make the roller of roller clutch enter wide raceway, driving gear continues also slowly to stop after rotation a period of time, vehicle also can slowly stop to move ahead, and can not cause the sensation of bringing to a halt, and has embodied the superiority of stable working.Roller clutch is big compared with the pawl clutch carry-over moment, good rigidly.

The present invention is embedded with one group of n in motor main casing 5 inboards simultaneously ²The magnetic element 26 that (n=1,2,4,8,16,32) individual isogonism distributes, the stator left end cap 6 of this magnetic element is provided with a Hall element 25 relatively, thereby constitute synchronous velocity measurement mechanisms, make the present invention have more innovative point, but the rotating speed of this synchronous velocity measurement mechanisms synchronous detecting wheel hub motor, rate accuracy is directly proportional with the magnetic element number, and present embodiment is got n=4, and rate accuracy can reach 1/16 changes.When 6 rotations of motor main casing 5 relative stator left end caps, Hall element 25 receives magnetic signal, and input controller converts the rotating speed demonstration to when testing the speed.

Claims

1, a kind of wheel hub motor, it comprises motor main casing (5) and the motor cover (18) that is connected mutually, be provided with the main shaft (1) of two ends in its central shaft hole with bearing (4) supporting, suit stator left end cap (6) and the stator right end cap (12) that is connected with it on the main shaft, by a stator left side, the right end cap spiral-lock in it by the stator that has coil windings (7) (8), magnet steel (9), the motor that rotor core (10) is formed, motor power drives the motor main casing and the motor cover that are fixed with one through planetary gear speed reducing mechanism and rotates, it is characterized in that described planetary gear speed reducing mechanism is the secondary planet reducing gear, by the driving gear (22) of movable set on main shaft (1), the planetary gear (13) on the planet axis (15) of being installed in driving gear engagement, gear III (17) while and carrier gear (19) coaxial with planetary gear, internal gear (16) engagement drives the motor cover (18) and the motor main casing (5) that are connected with internal gear and rotates; Described rotor core (10) is provided with the rotor bushing (27) that is fixed in the rotor core with driving gear (22) place of combining, and is provided with the roller clutch of forming with clutch outer shroud (33), roller rolling retainer (30), roller (32), the reed (31) of rotor bushing close-fitting (28) between this rotor bushing and the driving gear.

2, wheel hub motor according to claim 1, it is characterized in that described motor main casing (5) inboard is embedded with the magnetic element (26) of one group of isogonism distribution forming synchronous velocity measurement mechanisms, the stator left end cap (6) of this magnetic element is provided with Hall element (25) relatively.

3, wheel hub motor according to claim 1 and 2 is characterized in that described planet axis (15) and is installed in planetary gear (13) on the planet axis and gear III (17) forms one group that is connected that totally three groups are circumference uniform distribution.

4, wheel hub motor according to claim 1 is characterized in that described internal gear (16) is split type internal gear, is combined by four annulus.

5, wheel hub motor according to claim 1 is characterized in that described coil windings (7) is provided with winding cover (11) in an adjacent side with planetary gear (13).