CN201557008U

CN201557008U - Electric bicycle hub motor

Info

Publication number: CN201557008U
Application number: CN2009202018146U
Authority: CN
Inventors: 翁林华
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-12-03
Filing date: 2009-12-03
Publication date: 2010-08-18
Anticipated expiration: 2019-12-03

Abstract

The utility model discloses an electric bicycle hub motor, which comprises a spindle, a hub shell and a motor, wherein the hub shell is mounted on the spindle via a bearing, and the motor is arranged on one side in the hub shell. The motor adopts an inner-stator outer-rotor structure, the stator is fixed on the spindle via keyways, the rotor is mounted on the spindle via a two-gear bearing, a sun gear sleeved on the spindle is fixed on the rotor, the sun gear is engaged with three planet gears which are meshed with an inner gear fixed on the inner wall of the hub shell, and the three planet gears are respectively mounted on a planet gear shaft via a planet gear bearing. The electric bicycle hub motor is characterized in that a unidirectional bearing is fixedly sleeved on the spindle on the other side in the hub shell and embedded in a planet gear carrier, and three planet gear shafts are uniformly fixed on the planet gear carrier. Because the unidirectional bearing is high in concentricity and bearing capacity, the hub motor is stable in rotation, not easy to skid and long in service life. In addition, as the unidirectional bearing belongs to a standard part, maintenance and replacement thereof are simple and convenient.

Description

A kind of electric bicycle hub motor

Technical field

The utility model relates to a kind of power and transmission device of electric bicycle.Specifically a kind of wheel hub of electric bicycle motor.

Background technology

A kind of in the market wheel hub motor adopts the electric bicycle of planetary gear reducing mechanism form to realize double reduction, thereby produces high pulling torque.Adopt clutch to make the wheel function of wheel hub strengthen greatly, improved the function of riding greatly, and its mileages of continuation is greatly improved.But also there are some defectives: mainly be 1, clutch adopts pawl type or roller structure more.Pawl clutch plugging power is too big, and motor shaft backward rotation during electric vehicle brake causes to connect loosening easily generation potential safety hazard, and produces abnormal sound.Though roller clutch has solved the problem of pawl clutch, concentricity is poor, useful life is short, easily skid, and clutch action is poor.2, clutch is non-tender, must be through special processing, its maintain and replace inconvenience.

Electric bicycle hub motor with a kind of roller structure by clutch on-off is example (Fig. 4), it comprises main shaft 1, by bearing 2 wheel hub shell 3 is installed on the main shaft 1, wheel hub shell 3 comprises the wheel hub cover 31 in left side and the hubcap 32 on right side, and wheel hub shell 3 inboards are installed motor, planetary gear reducing gear and clutch from left to right successively.Described motor adopts the internal stator outer-rotor structure, stator 4 is fixed on the main shaft 1 by keyway, rotor 5 is installed on the main shaft 1 by two grades of bearings 6, rotor 5 is the peviform structure, the opening of peviform structure outwardly, be fixed with the central gear 7 that is enclosed within on the main shaft 1 on the rotor 5, central gear 7 is engaged with three planetary gears 8, three planetary gears 8 mesh with the ring gear 9 that is fixed on the wheel hub shell 3, planetary gear 8 is installed on the planet axis 11 by planetary gear bearing 10 respectively, planet axis 11 is separately fixed on the clutch 15, and clutch 15 is fixed on the main shaft 1 by keyway.

Described clutch 15 comprises the retainer plate 151 of inner ring and the body 152 of outer ring, (Fig. 5), retainer plate 151 is fixed on the main shaft 1, three planet axis 11 are fixed on the body 152, body 152 is provided with the groove 153 of opening towards retainer plate 151, the sidewall of groove 153 to retainer plate 151 has spacing 156, the direction of motion of the body 152 when spacing 156 is being prolonged electric motor car and advanced increases gradually, be provided with roller 154 in the groove 153, the diameter of roller 154 is between the maximum and minimum value of spacing 156, body 152 is provided with tangential hole 155, and tangential hole 155 is provided with push rod 157 from inside to outside successively, spring 158, silently 159.The rotation direction of roller 154 withstood on the roller 154 when push rod 157 advanced against electric motor car.

When electric motor car started, the body 152 of clutch 15 had a trend that rotates counterclockwise, and this trend makes roller 154 move to the small end of groove 153, made retainer plate 151 chuckings of roller 154 with body 152 and clutch.And,, cause three planetary gears 8 on the planet axis 11 can only under the drive of central gear 7, do certainly then can not revolve round the sun around central gear 7 so the body 152 of this moment is also fixing with respect to main shaft 1 because retainer plate 151 is fixing by keyway and main shaft 1.Planetary gear 8 time rotationals rotate by ring gear 9 driven wheel hub shells 3, and electric motor car is travelled forward.And electric bicycle when reversing, wheel hub shell 3 clockwise rotates the body 152 on the clutch 15 by ring gear 9, planetary gear (8), the pressure that this moment, roller 154 overcame spring 158 moves to the big end of groove 153, body 152 and retainer plate 151 are unclamped, so body 152 can rotate, be that planet gear 8 both can also can revolve round the sun in rotation, do not rotate, do not cause motor to produce reversing and can not drive central gear 7.Be not difficult more than to find that the structure of clutch is very complicated, and three planet axis are fixed on the clutch, make the required precision height, manufacture difficulty is well imagined.Clutch belongs to non-standard component, and it is quite difficult to want to change clutch.

Summary of the invention

The purpose of the utility model is to remedy above-mentioned deficiency, disclose a kind of with simple in structure to society, make and be easy to the wheel hub of electric bicycle motor that the standard component unilateral bearing replaces clutch, so that maintenance and replacing unilateral bearing, and further improve electric bicycle bearing capacity and useful life.

The technical solution of the utility model is achieved in that

A kind of electric bicycle hub motor, comprise main shaft, by the wheel hub shell of Bearing Installation on main shaft, the motor of a side in the wheel hub shell, described motor adopts the internal stator outer-rotor structure, stator is fixed on the main shaft by keyway, rotor passes through two grades of Bearing Installation on main shaft, be fixed with the central gear that is enclosed within on the main shaft on the rotor, central gear is engaged with three planetary gears, three planetary gears mesh with the ring gear that is fixed on the wheel hub outer casing inner wall, and planetary gear is installed on the planet axis by planetary gear bearing respectively; It is characterized in that: suit is being fixed a unilateral bearing on the described described main shaft of taking turns opposite side in the hub shell, and described unilateral bearing is bumped in the planetary gear carrier, is fixing described three planet axis on the described planetary gear carrier equably.

Described unilateral bearing mainly comprises: the outer ring that connects with described planetary gear carrier is fixed between inner ring on the main shaft, outer ring and the inner ring passive retainer, several voussoirs and several springs that cooperate with voussoir respectively and a plurality of steel ball by keyway.

Described planetary gear carrier is fixed on by keyway on the outer ring of unilateral bearing, and whole unilateral bearing is bumped into wherein.

The utility model has the advantages that:

Because the utility model clutch function is realized by unilateral bearing, and the concentricity of unilateral bearing is very high, make the wheel hub electric motor running more steady;

Because unilateral bearing has replaced clutch, the torque ratio clutch that unilateral bearing can bear exceeds a lot, and bearing capacity is very strong, wheel hub electric motor is not prone in the clutch process occurs skidding inadequately because of bearing capacity, its intensity and reliability strengthen greatly, and also be improved useful life;

Because unilateral bearing can be processed as standard component, institute is so that maintain and replace becomes simple and convenient;

Because what unilateral bearing adopted is the transmission of many Wedge-types, plugging power is very little, is not prone to motor shaft because of the counter-rotational phenomenon of plugging.

Description of drawings

Fig. 1 is the utility model embodiment overall structure schematic diagram (profile);

Fig. 2 is the utility model embodiment unilateral bearing structural representation (front view);

Fig. 3 is the profile of Fig. 2 left side apparent time;

Fig. 4 is a prior art overall structure schematic diagram (broken section);

Fig. 5 is the structural representation of clutch in the prior art.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

As shown in Figure 1: a kind of electric bicycle hub motor, comprise main shaft 1, be installed in wheel hub shell 3 on the main shaft 1 by bearing 2, the hubcap 31 in left side, the hubcap 32 on right side and wheel hub 33, the motor of a side in the wheel hub shell 3, described motor adopts the internal stator outer-rotor structure, stator 4 is fixed on the main shaft 1 by keyway, rotor 5 is installed on the main shaft 1 by two grades of bearings 6, be fixed with the central gear 7 that is enclosed within on the main shaft 1 on the rotor 5, central gear 7 is engaged with three planetary gears 8, three planetary gears 8 mesh with the ring gear 9 that is fixed on wheel hub shell 3 inwalls, and planetary gear 8 is installed on the planet axis 11 by planetary gear bearing 10 respectively; It is characterized in that: suit is being fixed a unilateral bearing 12 on the described described main shaft 1 of taking turns opposite sides in the hub shell 3, described unilateral bearing is bumped in the planetary gear carrier 13, is fixing described three planet axis 11 on the described planetary gear carrier 13 equably.

Described unilateral bearing 12 mainly comprises: the outer ring 121 (Fig. 2,3) that connects with described planetary gear carrier 13, several springs 125 and a plurality of steel ball 126 that are fixed on passive retainer 124, several voussoirs 123 between inner ring 122 on the main shaft 1, outer ring and the inner ring and cooperate with voussoir 123 respectively by keyway.

Described planetary gear carrier 13 is fixed on by keyway on the outer ring 121 of unilateral bearing 12, and whole unilateral bearing 12 is bumped into wherein.

When motor rotates, planetary gear carrier 13 has a trend that rotates counterclockwise, and planetary gear carrier 13 connects with the outer ring 121 of unilateral bearing 12, and this trend makes the voussoir 123 in the unilateral bearing 12 under the thrust of spring 125 outer ring 121 and inner ring 122 be tightened (Fig. 4).And,, cause three planetary gears 8 on the planet axis 11 can only under the drive of central gear 7, do certainly then can not revolve round the sun around central gear 7 so the planetary gear carrier 13 of this moment is also fixing with respect to main shaft 1 because inner ring 122 is fixing by keyway and main shaft 1.Planetary gear 8 time rotationals rotate by ring gear 9 driven wheel hub shells 3, and electric motor car is travelled forward.

When electric motor car was moveed backward, wheel hub shell 3 clockwise rotated planetary gear carrier 13 by ring gear 9, planetary gear 8.This moment, unclamped with inner ring 122 outer ring 121 of planetary gear carrier 13 drive unilateral bearings 12.So planetary gear carrier 13 can rotate, promptly planet gear (8) both can also can revolve round the sun in rotation, did not rotate and can not drive central gear 7, did not cause motor to produce reversing.

Planetary gear carrier of the present utility model is made and is easier to, and unilateral bearing belongs to standard component again, so the enforcement of entire product and unilateral bearing change all very conveniently, and the superiority of product is quite remarkable.

Claims

1. electric bicycle hub motor, comprise main shaft (1), be installed in wheel hub shell (3) on the main shaft (1) by bearing (2), the motor of a side in the wheel hub shell (3), described motor adopts the internal stator outer-rotor structure, stator (4) is fixed on the main shaft (1) by keyway, rotor (5) is installed on the main shaft (1) by two grades of bearings (6), be fixed with the central gear (7) that is enclosed within on the main shaft (1) on the rotor (5), central gear (7) is engaged with three planetary gears (8), three planetary gears (8) and ring gear (9) engagement that is fixed on wheel hub shell (3) inwall, planetary gear (8) is installed on the planet axis (11) by planetary gear bearing (10) respectively; It is characterized in that: described described main shaft (1) of taking turns the interior opposite side of hub shell (3) is gone up suit and is being fixed a unilateral bearing (12), described unilateral bearing is bumped in the planetary gear carrier (13), is fixing described three planet axis (11) on the described planetary gear carrier (13) equably.

2. electric bicycle hub motor according to claim 1, it is characterized in that, described unilateral bearing (12) mainly comprises: the outer ring (121) that connects with described planetary gear carrier (13) is fixed on a passive retainer (124), several voussoirs (123) and several springs (125) that cooperate with voussoir (123) respectively and a plurality of steel ball (126) between inner ring (122) on the main shaft (1), outer ring and the inner ring by keyway.

3. electric bicycle hub motor according to claim 2 is characterized in that, described planetary gear carrier (13) is fixed on the outer ring (121) of unilateral bearing (12) by keyway, and whole unilateral bearing (12) is bumped into wherein.