CN2836325Y - Hub motor - Google Patents

Abstract

The utility model provides a hub motor, which comprises one outer rotor of a motor and a quasi-planetary speed reduction gear transmission mechanism, wherein the quasi-planetary speed reduction gear transmission mechanism comprises one sun wheel, a plurality of planetary wheels, a gear ring and a planetary frame; the outer rotor of a motor is fixedly connected with the sun wheel; the planetary wheels can drive a hub shell to rotate. Because the hub motor of the utility model adopts an outer rotor motor, the outer rotor rotates and is directly connected with a speed reduction mechanism; the output power of unit weight (volume) is relatively great; compared with the hub motor with the same power, the volume is smaller. In addition, when the utility model is used for a motor-driven bicycle, the planetary speed reduction gear transmission mechanism and the outer rotor of a motor can not rotate following the hub motor, when electric power can not exist, or manpower is required in order to save electricity. In this way, force which is required for driving the hub shell to rotate is reduced, causing that the motor-driven bicycle using the hub motor to be conveniently used.

Description

Wheel hub motor

Technical field

The utility model relates to a kind of motor, and particularly a kind of motor directly drives the wheel hub motor that wheel hub rotates.

Background technology

The motor (wheel hub motor) that is rotated by the driven by motor wheel hub is widely used in electric motor car and other rotating mechanism.A kind of existing electric wheel hub is rotated by the direct driven wheel hub shell of motor outer rotor, and still, because rotating speed of motor is lower, the volume of motor is bigger usually, and moment of torsion is less.Another wheel hub motor adopts motor relatively at a high speed, through for example planetary reduction gear transmission mechanism driven wheel hub shell rotation of reducing gear.But owing to adopt conventional inner rotor motor, motor shaft links to each other with reducing gear, and the stator coil of this motor is in periphery, and rotor is an internal rotor, and the air gap diameter of a circle is less, and the power output of Unit Weight (volume) can not further strengthen; Perhaps adopt higher rotating speed, reach this purpose, can cause the reduction of the difficulty and the efficient of technology so again.

The utility model content

Technical problem to be solved in the utility model provides under a kind of same volume, and power output is bigger, relative rotation speed lower (speed reducing ratio is lower) and the high wheel hub motor of efficient.

To achieve these goals, the wheel hub motor that provides of the utility model comprises:

One motor shaft, this motor shaft maintains static moving;

One hub shell that links to each other with described motor shaft by bearing;

One has a winding electric machine stator with above-mentioned motor shaft is fixedly linked;

It is characterized in that it also comprises:

One motor outer rotor; And

Surely planetary reduction gear transmission mechanism, it comprises a sun gear, several planetary gears, gear ring and planet carrier, and described motor outer rotor and sun gear are fixedly linked, and described planetary gear drives described hub shell and rotates.

Further, the rotation axis of described planetary gear is fixed on the planet carrier, and described planet carrier and motor shaft are fixedly linked.

Further again, the described gear ring and the described hub shell of the wheel hub motor that the utility model provides link by an one-way clutch.

Also have, the slotted eye of stator core has also been taked the variable cross-section mode, improves the specific power of motor more; At described gear ring opening one gear ring lid is arranged simultaneously, and fix with described gear ring, it is lubricated reliably that mechanism is had.

The wheel hub motor that the utility model provides, owing to adopt external rotor electric machine, external rotor rotates and directly links to each other with reducing gear, the power output of Unit Weight (volume) is bigger, compare with the wheel hub motor of other same power, volume is less relatively, has very high use value.In addition, when being used for electric bicycle, when not having electric power or need drive by manpower for power saving, the external rotor of planetary reduction gear transmission mechanism and motor is not along with rotation, like this, the power that driving the hub shell rotation needs significantly reduces, and the use of the electric bicycle of feasible this wheel hub motor of use is convenient.

Description of drawings

Fig. 1 is the structural representation of the wheel hub motor that provides of the utility model.

Fig. 2 is the structural representation of the planetary reduction gear transmission mechanism of the wheel hub motor that provides of the utility model.

Fig. 3 is the structural representation of existing motor steel disc main body.

Fig. 4 is the A-A profile of Fig. 3.

Fig. 5 is the schematic diagram of basic model silicon steel sheet of the motor of wheel hub motor of the present utility model.

Fig. 6 is the schematic diagram of stator modification silicon steel sheet of the wheel hub motor of utility model.

Fig. 7 is the end view of silicon steel sheet main body of the motor of wheel hub motor of the present utility model.

Fig. 8 is the schematic diagram of the coil of an embodiment of the present utility model around silicon steel sheet.

Fig. 9 is the schematic diagram of the coil of another embodiment of the present utility model around silicon steel sheet.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.

Referring to Fig. 1, the wheel hub motor that the utility model provides comprises motor shaft 1, motor stator (containing coil) 2, motor outer rotor 3, sun gear 5, planetary gear 6, planet carrier 8, gear ring 9, one-way clutch 10 and hub shell 11.Motor shaft 1 is fixing, and motor stator 2 is fixing with motor shaft 1.Motor outer rotor 3 links to each other with motor shaft 1 by bearing 31.When electric motor starting, motor outer rotor 3 rotates.Motor outer rotor 3 links to each other with sun gear 5, rotates so drive sun gear 5.Sun gear 5, planetary gear 6 and planet carrier 8 are formed planetary reduction gear transmission mechanism surely.The rotation axis 61 of planetary gear 6 is fixed on the planet carrier 8, and planet carrier 8 is fixedly linked with motor shaft.Gear ring 9 is a plate-like, and it contains an internal gear 91, and it is by this internal gear 91 and planetary gear 6 engagements, and like this, planetary gear 6 can drive gear ring 9 and rotate.Gear ring 9 links by one-way clutch 10 and hub shell 11.Hub shell 11 links to each other with motor shaft 1 by bearing 111.

One-way clutch 10 can adopt one-way clutch commonly used, and it can make gear ring 9 to drive hub shell 11 in a direction and rotate that when gear ring 9 rotated, gear ring 9 linked to each other with hub shell 11, rotates gear ring 9 and can drive hub shell 11 rotations; Otherwise when hub shell 11 rotated, hub shell 11 separated with gear ring 9, and hub shell 11 does not drive gear ring 9 and rotates.The one-way clutch 10 of present embodiment adopts ratchet structure, and it comprises foreign steamer 101 and interior wheel 102.Interior wheel 102 is provided with two pawl (not shown).Foreign steamer 101 is ratchets of teeth in containing.Above-mentioned pawl can mesh with above-mentioned interior teeth, guarantees one-directional rotation.Wheel 102 is fixing with gear ring 9 in above-mentioned, and foreign steamer 101 is fixedly linked with hub shell 11.

Referring to Fig. 2, be provided with gear ring lid 91 at the left surface of gear ring 9 (opening one side), this gear ring lid 91 is bowl-shape, and side 911 and bottom surface 912 are arranged, central authorities are provided with a mesopore 913.Side 911 is fixed with the neighboring of gear ring 9, and bottom surface 912 parallels with the left surface of gear ring 9, and close proximity, as the 1-2 millimeter.

In addition, in order further to improve sealing property, between the outer surface of described gear ring lid and adjacent components (as motor housing), be provided with a sealing ring 914, prevent that further lubricant grease from leaking.

In addition, the stator of existing general motor adopts multi-disc silicon sheet core coiling, and referring to Fig. 3 and Fig. 4, the periphery of present silicon steel sheet 161 has notched slotted eye, this slotted eye be used for holding around coil 162.Because the above-mentioned hole of all silicon steel sheets 161 is identical, whole winding 162 around the cross section of part be a rectangle, like this, four right angle C are just arranged, because the line of coil always has certain rigidity, like this, when twining, will inevitably can form certain space F, G on above-mentioned rectangular both sides (face), because above-mentioned space, the magnetic force induction that rotor that makes or stator produce reduces, and efficiency of motor, power are lost.

In order to improve efficiency of motor, the utility model is divided into basic model silicon steel sheet and modification silicon steel sheet with silicon steel sheet, and referring to Fig. 5, Fig. 6, Fig. 7 and Fig. 8, motor of taking turns firm motor of the present utility model comprises shell, rotor and stator, and stator is built up by silicon steel sheet.Basic model silicon steel sheet 211 (see figure 5)s and some modification silicon steel sheets 212, motor stator 2 are built up by silicon steel sheet.Described silicon steel sheet includes some basic model silicon steel sheet 211 (see figure 5)s and some modification silicon steel sheet 212 (see figure 6)s, wherein, basic model silicon steel sheet 211 is more, they form motor magnetic induction main body together, open around basic model silicon steel sheet 211 and the modification silicon steel sheet 212 and are provided with some notched slotted eyes more.The slotted eye of this breach can be made different shape, usually shape as shown in Figure 3.The notched slotted eye of the above-mentioned periphery of modification silicon steel sheet 212 has formed the slotted eye of scalariform variable cross-section than the Kong Yaoda of basic model silicon steel sheet 211.Between two slotted eyes that the breach of above-mentioned silicon steel sheet constitutes, be wound with coil 162.Wherein, basic silicon shaped steel sheet 211 is arranged in the central authorities of main body 221, and two ends are respectively equipped with the modification silicon steel sheet.Like this, the end view of main body 221 as shown in Figure 7.When coil when last, referring to Fig. 8, can form a changeover portion E at four angles of main body 221, make that coil can be well on silicon steel sheet, and almost can closely press close to, making the smaller volume rotor also or the magnetic force increase of stator generation of coil, efficiency of motor also improves.

Referring to Fig. 9, the difference of the schematic diagram of another embodiment of motor stator 2 of the present utility model it and its first embodiment is to have to be divided into the group that some breach vary in size in modification silicon steel sheet 212, from the main body two ends, the size of the notched slotted eye of these groups constantly changes from big to small.Like this, can form a better changeover portion, make that coil more can be well on silicon steel sheet, and closely press close to, further improve efficiency of motor with silicon steel sheet at four angles of main body 221.

The description of top embodiment should not be the restriction to protection range of the present utility model, to those skilled in the art, on the basis of the foregoing description, still can do multiple variation, and its protection range should be defined by the claims.

Claims (7)

1, a kind of wheel hub motor, it comprises:

One motor shaft, this motor shaft maintains static moving;

The one firm housing of wheel that links to each other with described motor shaft by bearing;

One has a winding electric machine stator with above-mentioned motor shaft is fixedly linked;

It is characterized in that it also comprises:

One motor outer rotor; And

Surely planetary reduction gear transmission mechanism, it comprises a sun gear, several planetary gears, gear ring and planet carrier, and described motor outer rotor and sun gear are fixedly linked, and described planetary gear drives describedly takes turns firm housing and rotates.

2, wheel hub motor as claimed in claim 1 is characterized in that, the rotation axis of described planetary gear is fixed on the planet carrier, and described planet carrier and motor shaft are fixedly linked.

3, wheel hub motor as claimed in claim 1 is characterized in that, described gear ring and describedly take turns firm housing and link by an one-way clutch.

4, wheel hub motor as claimed in claim 1 is characterized in that, also is provided with gear ring lid in described bowl-shape gear ring opening one side, and peripheral and described gear ring is fixed, and keeps certain interval with planetary gear.

5, wheel hub motor as claimed in claim 4 is characterized in that, is provided with a sealing ring between the outer surface of described gear ring lid and the rotor that is close to.

6, wheel hub motor as claimed in claim 1, it is characterized in that, described motor stator core is made up of silicon steel sheet, periphery at silicon steel sheet has several notched slotted eyes, between above-mentioned slotted eye, be wound with coil, described silicon steel sheet includes some basic model silicon steel sheets and some modification silicon steel sheets, described basic model steel disc is formed the main body of stator, be respectively equipped with some distortion silicon steel sheets at the two ends of main body, slotted eye at the band gap slot boring ratio basic model steel disc of the periphery of modification silicon steel sheet wants big, form the slotted eye of scalariform variable cross-section.

7, wheel hub motor as claimed in claim 6 is characterized in that, described modification silicon steel sheet has can be divided into some groups, and from the main body two ends, the size of the notched slotted eye of these groups constantly changes from big to small, can form the slotted eye of uninterrupted variable cross-section.

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