CN2544974Y

CN2544974Y - Electric hub

Info

Publication number: CN2544974Y
Application number: CN 02222631
Authority: CN
Inventors: 刘锦韬
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-05-20
Filing date: 2002-05-20
Publication date: 2003-04-16
Anticipated expiration: 2012-05-20

Abstract

The utility model relates to an electrical wheel hub which includes a shell (19) and a end cover (1); the power output shaft of a disc motor (23) is connected with a gear ring (4) in the transmission way by a transmission gear; an inner star wheel (6) is freely fitted with the inner ring of the gear ring (4); the inner star wheel (6) is provided with a working face (601) contacting with a roller (5); the roller (5) is positioned in a wedge-shaped cavity formed by the working face (601) of the inner star wheel and the inner ring of the gear ring; the inner star wheel (6) is borne on a half shaft (9) by a bearing (7); the inner star wheel (6) is provided with a plurality of coupled axle-pins (13) which match the holes on the end cover (1), and rubber rings (14) are arranged accordingly. The clutch transmission device has the advantages of low noise, good lubrication and long service life.

Description

Electric wheel hub

Technical field:

The utility model is relevant with the electric wheel hub of electric bike.

Technical background:

Band subtracts in the used electric wheel hub of toothed electric bike at present, and the overriding clutch design mainly contains two kinds: a kind of is star-wheel roller type one way angle of wedge self-locking mode, and another kind is a ratchet unidirectional self-lock formula.The former advantage is that nothing is impacted, the life-span is long, and the reliability height can be used for high speed situation; Latter's advantage is that cost is low, and good economy performance, shortcoming are that Q-percentile life is than weak point and after only being used for the low speed field.Electrical Bicycle generally is being rigid attachment with star-wheel free wheeling roller chutch design star-wheel in the electric wheel hub with connecting of wheel hub at present, and advantage is that assembling is simple, generally forms power-transfer clutch by gear ring, roller, spring and star-wheel.Star-wheel and wheel hub end housing rigid attachment are whole, and shortcoming one is that the gear transmission wheel hub is passed through in the torque pulsation of motor, and noise is bigger; The 2nd, the last two-stage gear of this kind connecting mode can only be done the open type grease lubrication.Long-time high temperature, grease viscosity diminishes, and progressively falls under centrifugal action, and the lubricant effect of tooth is very poor, and tooth even may dry grind lost efficacy at last.

The content of utility model:

The purpose of this utility model provides a kind of low noise, long service life, the electric wheel hub that productive costs is low.

The utility model is achieved in that

The utility model electric wheel hub, comprise housing (19), end cap (1), the power take-off shaft of disc type electric machine (23) is in transmission connection by transmission gear and gear ring (4), the inner ring running-fit of star-wheel (6) and gear ring (4), the driving surface (601) that contacts with roller (5) is arranged on the star-wheel (6), the driving surface (601) that roller (5) is positioned at star-wheel is connected with the wedge cavities of gear ring inner ring formation and with springing (34), star-wheel (6) is bearing on the semiaxis (9) by bearing (7), star-wheel (6) is provided with some coupled axle-pins (13) and cooperates with hole on end cap (1) or the housing, and rubber ring (14) is arranged therebetween.

Star-wheel (6) is provided with some pin-and-holes (603), and pin-and-hole (603) both ends of the surface are respectively back shield (30) and front apron (15), coupled axle-pin (13) and pin-and-hole close fit, and forward and backward baffle plate fixed the forward and backward two ends of forward and backward baffle plate sealing wedge cavities.

Coupled axle-pin (13) is five or four or three, with star-wheel center rotation rectangular distribution.

Star-wheel outer ring φ L is than the little 0.01-0.04mm of gear ring endoporus φ C, and its width B L is than the big 0.05-0.2mm of gear ring width B C.

Coupled axle-pin (13) has big end and small end, and small end cooperates with pin-and-hole (603), and big end cooperates with hole on the end cap.

Coupled axle-pin (13) is become with ring (1302) riveting structure by rivet.

Screw (1304) and coupled axle-pin female connection, and forward and backward baffle plate (30,15) is fixed on the star-wheel.

The end cap of the mid-transmission of power-transfer clutch (1) outer face is straight, and there is bearing (21,22) at little tooth axle (3) two ends, and casing (2) front end both sides has oil sealing plate (50) fixing with screw (51), forms semiclosed preceding grease chamber (18).

What power-transfer clutch was preposition has boss for for example scheming outside (29), (30), (31) end cap (1), and miniature gears (3) one ends have bearing (21).Casing (2) front end has oil sealing plate (16) fixing with screw (17), forms semiclosed preceding grease chamber (18).

Two kinds of sealing structures of the present utility model all gear parts, improved the lubrication state of gear, reduced mechanical wear; Owing to adopt cushion rubber shaft coupling mode, reduced motor torque ripple, reduced noise; Effectively prolonged the life-span that the gear hub motor gear is arranged; Clutch part can be used as isolated footing part specialization and produces, and productive costs is low.

Description of drawings:

Fig. 1 is a constructional drawing of the present utility model.

Fig. 2 removes constructional drawing behind the end cap shell for the utility model.

Fig. 3 is the right elevation of Fig. 2.

Fig. 4, Fig. 5, Fig. 6 are star-wheel clutch configuration figure.

Fig. 7 is star-wheel and gear ring structure figure.

Fig. 8-Figure 13 is coupled axle-pin and star-wheel structure cutaway view.

Figure 14-Figure 16 is the star-wheel constructional drawing.

Figure 17 is Figure 14,15,16 4-4 cutaway view.

Figure 18-Figure 20 is forward and backward baffle arrangement figure.

Figure 21 is forward and backward baffle plate cutaway view.

Figure 22, Figure 24 are gear ring structure figure.

Figure 23 is the 2-2 cutaway view of Figure 22.

Figure 25 is the 3-3 cutaway view of Figure 24.

Figure 26-Figure 28 is end cover structure figure.

Figure 29 is the wheel hub structure figure of the preposition transmission of power-transfer clutch.

Figure 30 is for removing the preposition drive mechanism figure of wheel hub shell power-transfer clutch.

Figure 31 is the right elevation of Figure 30.

The specific embodiment:

The utility model is exactly in order to overcome the deficiency of the existing design of star-wheel free wheeling roller chutch.The motor 23 of motor wheel hub shown in Figure 1 is a disc type electric machine for example to be changed in the power-transfer clutch, can adopt motors such as printed circuit motor, disc type winding electric machine or disc type dc brushless motor.Connect by screw 28 (also can adopt rivet) with semiaxis 9 as Fig. 2 gear housing 2 middle parts, left end connects by screw 31 with motor 23 shells, motor 23 left ends connect with hollow shaft 26, being convenient to motor electric wire 27 passes, therefore, left and

right sides semiaxis

26,9 and motor body 23, gear housing 2 are coupled to rigid body and are fixed on the bicycle fork motionless.

Characteristics of the present utility model are:

1, star-wheel structure

Shown in Figure 14,17, except that working face 601 that general star-wheel is arranged (contacting with roller) and spring eye 602, ad hoc have a pin-and-hole 603, is symmetrically distributed with the rotation of star-wheel center.The outer garden φ L of star-wheel is convenient to gear ring than the little 0.01mm-0.04mm of gear ring (Figure 23,25) endoporus φ C and is slided, can adopt five utmost points, four utmost points, three utmost point modes (seeing Figure 14,16,15), preferably adopt five utmost point formulas for big rim as 24 " 22 ", can adopt four utmost points or three utmost points for ringlet 20 " 16 ", because rim is big more, rotating speed is low more, and moment of torsion is big more, otherwise more little.

2, front and rear baffle

Referring to Fig. 4,7, gear ring 4 by front and

rear baffle

15,30 restrictive axial plaies, but has the 0.05mm-0.2mm gap on star-wheel 6.The front and rear baffle dimensional structure is identical, and shown in Figure 18,19,20, hole count is identical with the star-wheel number of poles, and the hole site is relative with star-wheel pin-and-hole 603, sees Figure 15, and available 0.5-1.2 steel plate is stamped to form.

3, coupled axle-pin

Referring to Fig. 4,7, coupled axle-pin 13 passes star-wheel pin-and-hole 603 front and

rear baffle

15,30. is connected in star-wheel 6 two ends, forms clutch assembly with gear ring 4, roller 5, spring 34 bearings 7.The assembling of the design's coupled axle-pin 13 (see figure 4)s and front and rear baffle, star-wheel except that the tailored version that adopts Fig. 4, can be adopted Fig. 8 mode, forms coupled axle-pin with tender rivet and ring 1302 rivetings knot.If adopt centering rivet (Fig. 9) assembling more convenient, but should guarantee the shearing resistance area of its root.If be convenient to maintenance, also can adopt Figure 10 mode, with screw 1304 and coupled axle-pin female connection.Clutch assembly divides coventional type and high pulling torque type.Fig. 4 is a coventional type; Fig. 5,6 is the moment of torsion type greatly, owing to the star-wheel broad, has surpassed part grommet 12 Limit Bearings of bearing width.

4, on rubber ring and the wheel hub end housing with the cooresponding cushion rubber of coupled axle-pin hole

See Figure 26,27,28, on wheel hub end housing 1 inner convex platform ad hoc have with the relevant position of coupled axle-pin 13 and the hole 101 of quantity be used to install rubber ring 14, with the supporting coupled axle-pin.See that its mode of operation of Fig. 2 is: clutch assembly is floated on semiaxis 9 by bearing 7, on semiaxis 9, is seen Fig. 1,2 by back-up ring 11 axial limitings, and lining ring 10 is used to adjust the gap with wheel hub end housing 1 end face.Little tooth 24 driven gears 20 during motor rotation on the motor shaft, gear 20 and little tooth axle 3 connect for whole by key or alternate manner on same axle.When little tooth axle 3 transmissions clockwise rotate for gear ring 4, roller 5 (referring to Fig. 7) rolls the angle of wedge small end that forms to by gear ring 4 and star-wheel driving surface 601 under spring 34 effects, thereby self-locking, the power-transfer clutch combination, star-wheel 6 also clockwise rotates, power is passed to rubber circle 14 by coupled axle-pin 13, and rubber ring 14 is contained in the respective aperture 101 of wheel hub end housing 1, thereby the drive wheel hub clockwise rotates.

When bicycle during at sliding state, wheel hub clockwise rotates, the rubber ring 14 of the respective aperture by wheel hub end housing 1 drives coupled axle-pins 13 and star-wheel 6 clockwise rotates, roller 5 overcomes acting force of the spring and rolls big end to the angle of wedge that is formed by gear ring 4 and star-wheel driving surface 601 under the friction force effect of gear ring 4, thereby throw-out-of clutch, electric wheel hub quits work.

5, the preceding grease chamber of gear housing front end and side oil sealing plate formation

Referring to Fig. 2,3, gear housing 2 has has oil sealing plate 50 usefulness screws 17 fixing on the front end both sides, thereby forms semiclosed preceding grease chamber 18 in the oil sealing plate, stores grease, and guarantees that under the centrifugal action of high speed revolution, grease can not run off.

The design's gear ring 4 (seeing Figure 22,23) improves the bending strength and the contact strength of tooth in order to improve its durability, can adopt the step gear ring shown in Figure 24,25, and gear ring convex edge 401 has increased the facewidth effectively, but does not increase overall axial dimension.

The design's embodiment, coventional type is that the mid-transmission of the power-transfer clutch shown in Fig. 1,2 is that the characteristics that example should example are cushion rubber hole protuberances in wheel hub, preceding grease chamber seals with side shield; The high pulling torque type is with Figure 29,30, and the preposition transmission of power-transfer clutch is an example, and these routine characteristics are cushion rubber hole male part at wheel hub, and oil sealing plate (16) is semiclosed before the transmission of little tooth cantilever, the external application of preceding grease chamber.High pulling torque type and common moment of torsion type power-transfer clutch all can be in the preposition transmissions of the mid-driving type power-transfer clutch of power-transfer clutch

Adopt among the embodiment.

Detailed description of main elements:

1, wheel hub end housing 101 cushion rubber holes

2, gear housing

3, pinion

4, gear ring 401 gear ring convex edges

5, roller

6, star-wheel 601 star-wheel working faces, 602 springs, 603 pin-and-holes

7, bearing

8, bearing

9, semiaxis

10, lining ring

11, back-up ring

12, grommet

13, coupled axle-pin, 1301 rivet holes, 1302 rings, 1304 screws

14, rubber ring

15, front apron

16, front oil sealing plate

17, screw

18, preceding grease chamber

19, wheel hub

20, gear

21, bearing

22, bearing

23, disc type electric machine

24, little tooth 25, bearing 26, hollow half axle 27, lead 28, screw 29, grease chamber 30, back, back shield 31, screw 34, spring 50, oil sealing plate 51, screw

Claims

1, electric wheel hub, comprise housing (19), end cap (1), the power take-off shaft of disc type electric machine (23) is in transmission connection by transmission gear and gear ring (4), the inner ring running-fit of star-wheel (6) and gear ring (4), the driving surface (601) that contacts with roller (5) is arranged on the star-wheel (6), the driving surface (601) that roller (5) is positioned at star-wheel is connected with the wedge cavities of gear ring inner ring formation and with springing (34), star-wheel (6) is bearing on the semiaxis (9) by bearing (7), it is characterized in that star-wheel (6) is provided with some coupled axle-pins (13) and cooperates with hole on end cap (1) or the housing, rubber ring (14) is arranged therebetween.

2, electric wheel hub according to claim 1, it is characterized in that star-wheel (6) is provided with some pin-and-holes (603), pin-and-hole (603) both ends of the surface are respectively back shield (30) and front apron (15), coupled axle-pin (13) and pin-and-hole close fit, and forward and backward baffle plate fixed the forward and backward two ends of forward and backward baffle plate sealing wedge cavities.

3, electric wheel hub according to claim 1 is characterized in that coupled axle-pin (13) is five or four or three, with star-wheel center rotation rectangular distribution.

4, electric wheel hub according to claim 1 is characterized in that star-wheel outer ring φ L than the little 0.01-0.04mm of gear ring endoporus φ C, and its width B L is than the big 0.05-0.2mm of gear ring width B C.

5, electric wheel hub according to claim 1 is characterized in that coupled axle-pin (13) has big end and small end, and small end cooperates with pin-and-hole (601), and big end cooperates with hole on the end cap.

6, electric wheel hub according to claim 1 is characterized in that coupled axle-pin (13) is become with ring (1302) riveting structure by rivet.

7, electric wheel hub according to claim 1 is characterized in that screw (1304) and coupled axle-pin female connection, and forward and backward baffle plate (30,15) is fixed on the star-wheel.

8, electric wheel hub according to claim 1 is characterized in that end cap (1) end face is straight, and there is bearing (21,22) at little tooth axle (3) two ends, and casing (2) front end both sides has oil sealing plate (50) fixing with screw (51), forms semiclosed preceding grease chamber (18).

9, electric wheel hub according to claim 1 is characterized in that end cap outer (1) has boss, and miniature gears (3) one ends have bearing (21), and casing (2) front end has oil sealing plate (16) fixing with screw (17), forms semiclosed preceding grease chamber (18).