CN2670155Y

CN2670155Y - Hub of electric bicycle

Info

Publication number: CN2670155Y
Application number: CNU2003201234009U
Authority: CN
Inventors: 贺先兵; 王清华
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-19
Filing date: 2003-12-19
Publication date: 2005-01-12
Anticipated expiration: 2013-12-19

Abstract

The utility model discloses a hub for an electric bicycle, comprising a main shaft provided with the housing of the hub by a bearing. The housing of the hub is provided with an electric motor, a planet wheel speed reducing mechanism and a clutch, the electric motor adopts an inner stator and outer rotor structure, an a sun gear covering the main shaft is fixed to the rotor. The sun gear is engaged with a planet wheel, an inner gear ring fixed to the housing of the hub is engaged with the planet wheel installed on a planet shaft by a bearing, and the planet shaft is fixed to the clutch, with the fixation of the clutch to the main shaft. The utility model has the advantages of large power, small volume, low noise and long service life.

Description

Wheel hub of electric bicycle

Technical field

The utility model relates to a kind of wheel hub of electric bicycle.

Background technology

In recent years, Electrical Bicycle is accepted by consumers in general gradually as a kind of environmental protection, the energy-conservation vehicle, no matter still external at home, Electrical Bicycle sales volume is worldwide also increasing year by year, and the trend that Electrical Bicycle substitutes bicycle progressively enlarges.But present Electrical Bicycle manufacturing technology is not perfect, also exists many weak points, and for example electric wheel hub just has shortcomings such as power is little, volume is big, noise is big, the life-span is short.

Existing electric wheel hub includes parts such as main shaft, wheel hub shell, motor, speed reduction gearing, power-transfer clutch and forms, motor generally adopts the internal rotor outer stator structure, so the power ratio of motor is less, speed reduction gearing adopts planetary gear structure, and planetary wheel is fixed on the pinion carrier, and clutch body is fixed on the wheel hub end housing, pinion carrier and clutch body carry out clutch again, so structure more complicated, volume are also bigger, the noise when riding is bigger.

Summary of the invention

The purpose of this utility model is: a kind of wheel hub of electric bicycle is provided, and this wheel hub improves motor and power-transfer clutch, makes that it is more powerful, volume is littler, noise is lower, the life-span is longer.

The technical solution of the utility model is: a kind of wheel hub of electric bicycle, comprise main shaft, by bearing installation the wheel hub shell is arranged on the main shaft, in the wheel hub shell motor, satellite gear speed reduction gearing and power-transfer clutch are installed, described motor adopts the internal stator outer-rotor structure, be fixed with the sun gear that is enclosed within on the main shaft on the rotor, sun gear is engaged with planetary wheel, planetary wheel and the internally toothed annulus engagement that is fixed on the wheel hub shell, planetary wheel by bearing installation on planet axis, planet axis is fixed on the power-transfer clutch, and power-transfer clutch is fixed on the main shaft.

The further technical scheme of the utility model is: a kind of wheel hub of electric bicycle, comprise main shaft, by bearing installation the wheel hub shell is arranged on the main shaft, in the wheel hub shell motor, satellite gear speed reduction gearing and power-transfer clutch are installed, described motor adopts the internal stator outer-rotor structure, be fixed with the sun gear that is enclosed within on the main shaft on the rotor, sun gear is engaged with planetary wheel, planetary wheel and the internally toothed annulus engagement that is fixed on the wheel hub shell, planetary wheel by bearing installation on planet axis, planet axis is fixed on the power-transfer clutch, and power-transfer clutch is fixed on the main shaft; Described stator is fixed on the main shaft, and on main shaft, rotor is the peviform structure to rotor by two grades of bearing installations, and the opening of peviform structure outwardly.

The more detailed technical scheme of the utility model is: a kind of wheel hub of electric bicycle, comprise main shaft, by bearing installation the wheel hub shell is arranged on the main shaft, in the wheel hub shell motor, satellite gear speed reduction gearing and power-transfer clutch are installed, described motor adopts the internal stator outer-rotor structure, be fixed with the sun gear that is enclosed within on the main shaft on the rotor, sun gear is engaged with planetary wheel, planetary wheel and the internally toothed annulus engagement that is fixed on the wheel hub shell, planetary wheel by bearing installation on planet axis, planet axis is fixed on the power-transfer clutch, and power-transfer clutch is fixed on the main shaft; Described stator is fixed on the main shaft, and on main shaft, rotor is the peviform structure to rotor by two grades of bearing installations, and the opening of peviform structure outwardly; Described power-transfer clutch comprises the mounting ring of inner ring and the body of outer ring, mounting ring is fixed on the main shaft, planet axis is fixed on the body, body be provided with opening towards mounting ring groove, the sidewall of groove to mounting ring has spacing, the rotation direction of body increased gradually when spacing was being prolonged battery-driven car and advanced, be provided with roller in the groove, the diameter of roller is between the maxim and minimum value of spacing, body is provided with tangential hole, tangential hole is provided with push rod, spring, silently from inside to outside successively, and the rotation direction of roller withstood on the roller when push rod advanced against battery-driven car.

The utility model has the advantages that:

1. the utility model adopts the electric machine structure of internal stator outer rotor, has improved the power of motor, and rotor design becomes the peviform structure, and a side is an opening outwardly, helps motor radiating.

2. planetary wheel of the present utility model is installed on the clutch body, has simplified the structure of power-transfer clutch, has alleviated the weight of member, has simplified the processing technology of power-transfer clutch.

3. because These characteristics of the present utility model can make the electric wheel hub volume littler, can reduce operating noise simultaneously, increase the service life.

Description of drawings

The utility model will be further described below in conjunction with drawings and Examples:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the right elevation of power-transfer clutch among Fig. 1.

Wherein: 1 main shaft; 2 bearings; 3 take turns hub shell; 4 stators; 5 rotors; 6 bearings; 7 sun gears; 8 planetary wheels; 9 internal tooths; 10 bearings; 11 planet axis; 12 power-transfer clutchs; 13 mounting rings; 14 bodies; 15 grooves; 16 spacings; 17 rollers; 18 tangential holes; 19 push rods; 20 springs; 21 silently; 22 wheel hub covers; 23 wheel caps.

The specific embodiment

Embodiment: as shown in Figure 1, a kind of wheel hub of electric bicycle, comprise main shaft (1), main shaft (1) is gone up by bearing (2) wheel hub shell (3) is installed, wheel hub shell (3) comprises the wheel hub cover (22) in left side and the wheel cap (23) on right side, in the wheel hub shell (3) motor is installed successively from left to right, satellite gear speed reduction gearing and power-transfer clutch, 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 sun gear (7) that is enclosed within on the main shaft (1) on the rotor (5), sun gear (7) is engaged with three planetary wheels (8), three planetary wheels (8) and internally toothed annulus (9) engagement that is fixed on the wheel hub shell (3), planetary wheel (8) is installed on the planet axis (11) by bearing (10) respectively, planet axis (11) is separately fixed on the power-transfer clutch (12), and power-transfer clutch (12) is fixed on the main shaft (1) by keyway; Described power-transfer clutch (12) comprises the mounting ring (13) of inner ring and the body (14) of outer ring, mounting ring (13) is fixed on the main shaft (1), planet axis (11) is fixed on the body (14), body (14) be provided with opening towards mounting ring (13) groove (15), the sidewall of groove (15) to mounting ring (13) has spacing (16), the rotation direction of body (14) increased gradually when spacing (16) was being prolonged battery-driven car and advanced, be provided with roller (17) in the groove (15), the diameter of roller (17) is between the maxim and minimum value of spacing (16), body (14) is provided with tangential hole (18), tangential hole (18) is provided with push rod (19) from inside to outside successively, spring (20), silently (21), the rotation direction of push rod (19) roller (17) when advancing against battery-driven car withstands on the roller (17).

As shown in Figure 2, when motor rotates, the body (14) of power-transfer clutch (12) has a trend that rotates counterclockwise, this trend makes roller (17) move to the small end of groove (15), make roller (17) with body (14) and mounting ring (13) chucking, and because mounting ring (13) is fixing by keyway and main shaft (1), so the body (14) of this moment is also fixing with respect to main shaft (1), cause planetary wheel (8) on three planet axis (11) can only under the drive of sun gear (7), do from then can not revolve round the sun around sun gear (7), planetary wheel (8) time rotational rotates by internally toothed annulus (9) driven wheel hub shell (3), and battery-driven car is travelled forward.

And Electrical Bicycle when reversing, wheel hub shell (3) clockwise rotates the body (14) on the power-transfer clutch (12) by internally toothed annulus (9), planetary wheel (8), the pressure that roller this moment (17) overcomes spring (20) moves to the big end of groove (15), body (14) and mounting ring (13) are unclamped, so body (14) 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 sun gear (7).

Claims

1. wheel hub of electric bicycle, comprise main shaft (1), main shaft (1) is gone up by bearing (2) wheel hub shell (3) is installed, in the wheel hub shell (3) motor is installed, satellite gear speed reduction gearing and power-transfer clutch, it is characterized in that: described motor adopts the internal stator outer-rotor structure, be fixed with the sun gear (7) that is enclosed within on the main shaft (1) on the rotor (5), sun gear (7) is engaged with planetary wheel (8), planetary wheel (8) and internally toothed annulus (9) engagement that is fixed on the wheel hub shell (3), planetary wheel (8) is installed on the planet axis (11) by bearing (10), planet axis (11) is fixed on the power-transfer clutch (12), and power-transfer clutch (12) is fixed on the main shaft (1).

2. wheel hub of electric bicycle according to claim 1 is characterized in that: described stator (4) is fixed on the main shaft (1), and rotor (5) is installed on the main shaft (1) by two grades of bearings (6), and rotor (5) is the peviform structure, and the opening of peviform structure outwardly.

3. wheel hub of electric bicycle according to claim 1, it is characterized in that: described power-transfer clutch (12) comprises the mounting ring (13) of inner ring and the body (14) of outer ring, mounting ring (13) is fixed on the main shaft (1), planet axis (11) is fixed on the body (14), body (14) be provided with opening towards mounting ring (13) groove (15), the sidewall of groove (15) to mounting ring (13) has spacing (16), the rotation direction of body (14) increased gradually when spacing (16) was being prolonged battery-driven car and advanced, be provided with roller (17) in the groove (15), the diameter of roller (17) is between the maxim and minimum value of spacing (16), body (14) is provided with tangential hole (18), tangential hole (18) is provided with push rod (19) from inside to outside successively, spring (20), silently (21), the rotation direction of push rod (19) roller (17) when advancing against battery-driven car withstands on the roller (17).