CN2734539Y

CN2734539Y - Driving device used for electric bicycle

Info

Publication number: CN2734539Y
Application number: CN 200420022859
Authority: CN
Inventors: 李朝东; 王秀梅; 王云平; 章跃进; 丁荣伟; 崔太湜; 江建中
Original assignee: Shanghai Xin Xin Electrical And Mechanical Technology Development Co Ltd; SHANGHAI UNIVERSITY
Current assignee: Shanghai Xin Xin Electrical And Mechanical Technology Development Co Ltd; SHANGHAI UNIVERSITY
Priority date: 2004-05-18
Filing date: 2004-05-18
Publication date: 2005-10-19
Anticipated expiration: 2014-05-18

Abstract

The utility model relates to a driving device for an electric bicycle, which is characterized in that: a hollow shaft is covered with a wheel shaft in a wheel hub, a DC motor and a speed reducer are connected with the hollow shaft, and the speed reducer is a planetary gear transmission mechanism with few tooth differences. Compared with the current electric bicycle driving device, the utility model has the following advantages: 1. less parts, small structural volume, especially small radial dimension; 2. large single-stage speed ratio, large bearing capacity and low noise; 3. The utility model is equipped with an oil retaining ring to prevent the loss of lubricant, and has good lubrication conditions and low gear wear; 4. The structure is relatively simple, many parts are reduced, and the manufacturing process is simplified, so the cost is greatly reduced.

Description

A kind of actuating device that is used for Electrical Bicycle

Technical field:

The utility model belongs to the technical field of mechanical equipment, relates to a kind of few tooth difference actuating device that is used for Electrical Bicycle specifically.

Background technology:

The motor of general Electrical Bicycle of the prior art and driving device volume are big, mechanical component are many, structure is comparatively complicated, especially radial dimension is bigger, not only makes the volume of battery-driven car big, Heavy Weight, and gear load skewness, have in addition that noise is big, poor lubrication, gear wear be big, tends to cause the damage of the gear teeth, be very easy to occur the gear teeth when adopting plastic gear damage.

Summary of the invention:

The purpose of this utility model just provides a kind of improved actuating device that is used for Electrical Bicycle, and it can improve load-carrying capacity, reduces mechanism, reduced volume, cost-cutting.

To achieve these goals, the technical solution of the utility model is: a kind of actuating device that is used for Electrical Bicycle, it mainly comprises wheel hub, pass the axletree of wheel hub, be arranged on DC machine, retarder and overriding clutch in the wheel hub, it is characterized in that: axletree overcoat one hollow shaft in wheel hub, DC machine is connected with hollow shaft with retarder, and retarder is the small teeth number difference planet gear transmission device.

The utility model is compared the advantage that has with present Electrical Bicycle actuating device and is:

1. the utility model is combined as a whole DC machine and retarder by hollow shaft, and part is few, and structural volume is little, and especially radial dimension is little;

2. retarder of the present utility model adopts the small teeth number difference planet gear transmission, and a plurality of teeth mesh simultaneously, and the single-stage speed ratio is big, and load-carrying capacity is big, and noise is low;

3. the utility model is provided with oil seal washer, prevents bleeding of lubricant, and lubricating condition is good, and gear wear is low;

4. the utility model reduces many parts because structure is comparatively simple, and simplified manufacturing process is so cost greatly reduces.

Description of drawings:

Fig. 1 is the structural representation of the utility model one embodiment

The specific embodiment:

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

The utility model is a kind of Electrical Bicycle actuating device that is used for, being labeled as in the accompanying drawing:

1 step disk, 2 planetary wheels, 3 inner geares, 4 oil seal washers, 5 stator left end caps, 6 bearing pins, 7 wheel hub circles, 8 motor stators, 9 brushes, the right lid of 10 wheel hubs, 11 holding screws, 12 axletrees, 13 tightening dishes, 14 bearings, 15 engine commutators, 16 stator right end caps, 17 hollow shafts, 18 bearings, 19 rotors, 20 wheel hubs left side lid, 21 bearings, 22 overriding clutchs, 23 keys, 24 output panels, 25 bearings, 26 bearings, 27 junction of the edges of two sheets of paper screws, 28 eccentric bushings.The utility model mainly comprises wheel hub, pass the axletree 12 of wheel hub, be arranged on DC machine, retarder and overriding clutch 22 in the wheel hub, it is characterized in that: axletree 12 overcoats one hollow shaft 17 in wheel hub, DC machine is connected with hollow shaft 17 with retarder, and retarder is the small teeth number difference planet gear transmission device.DC machine in the utility model is a prior art, and it comprises motor stator, rotor, motor steering device, brush, and can be that the brush DC machine is arranged, and also can be brshless DC motor; Axletree is an axis in the enforcement, constitute framework by tightening dish 13, stator right end cap 16, motor stator 8, stator left end cap 5, bearing pin 6 and step disk 1, fix with axletree by holding screw 11 and key 23, retarder is fixed by junction of the edges of two sheets of paper screw and hollow shaft, be that tightening dish 13 is captiveed joint with stator right end cap 16, captive joint with stator left end cap 5, stator right end cap 16 respectively in the two ends of motor stator 8, stator left end cap 5 connects and composes framed structure by bearing pin 6 and step disk 1; Hollow shaft 17 is bearing on motor stator left end cap 5 and the stator right end cap 16 by bearing 18 and bearing 14.The small teeth number difference planet gear transmission device is made of a pair of planetary wheel 2, inner gear 3, the eccentric bushing 28 that is mutually 180 °, and eccentric bushing 28 links to each other with hollow shaft 17 by junction of the edges of two sheets of paper screw 27; Planetary wheel 2 and inner gear 3 engagements, inner gear 3 is fixing with output panel 24; The small teeth number difference planet gear transmission is that retarder is that inner gear and planetary tooth difference in the small teeth number difference planet gear transmission device of involute is little, general tooth difference is the 1-4 tooth, a plurality of tooth engagements can be arranged between large internal gear and planetary wheel so simultaneously, gear load is evenly distributed.The right side of the utility model large internal gear 3 is provided with an oil seal washer 4; DC machine is contained on the hollow shaft 17 by bearing carrier ring, the left end cap 5 of stator links to each other by bearing pin 6 with step disk 1, and planetary wheel 2 is sleeved on the bearing pin 6, and wheel hub is contained on the axletree by bearing carrier ring, wheel hub has a wheel hub circle 7, and the right lid 10 of wheel hub, wheel hub left side lid 20 are equipped with in the both sides of wheel hub circle 7; Be expendable weight, reduce noise, planetary wheel 2 can be made with engineering plastics; After eccentric bushing 28 and hollow shaft 17 interference fit, connect with junction of the edges of two sheets of paper screw 27; After tightening dish 13 and axletree 12 interference fit, connect with holding screw 11, step disk 1 is connected with axletree 12 usefulness keys 23, to overcome peripheral force; Rotor 19 usefulness force fits are entrenched on the hollow shaft 17; According to different operatings needs, the utility model can have different embodiment.When big or transmitting ratio is big when the retarder size, can adopt the standard antifriction-bearing box directly to be contained on the bearing pin 6; Less or transmitting ratio hour can adopt needle roller to be bearing on the bearing pin 6 when the retarder size; In the time of can't packing needle roller into, can adorn antifriction cover and replace needle roller.

Dynamic process of the present utility model is to realize like this, because axletree 12 is concentric shafts with hollow shaft 17, eccentric bushing 28 links to each other with hollow shaft 17 by junction of the edges of two sheets of paper screw 27, rotor 19 rotates, drive eccentric bushing 28 and rotate, drive planetary wheel 2 and inner gear 3 engagements, again because inner gear 3 is fixing with output panel 24, by output panel 24 output is delivered to the wheel hub left side lid 20 that is attached thereto by overriding clutch 22, thereby drives the wheel hub rotation.

Claims

1. A driving device for an electric bicycle, which mainly includes a wheel hub, a wheel shaft passing through the wheel hub, a DC motor, a speed reducer and an overrunning clutch arranged in the wheel hub, and is characterized in that: the wheel shaft outer casing in the wheel hub The hollow shaft, the DC motor and the reducer are connected with the hollow shaft, and the reducer is a planetary gear transmission mechanism with small tooth difference.

2. A driving device for an electric bicycle according to claim 1, characterized in that: the wheel shaft is a through shaft, which consists of a tight disc (13), a right end cover of the stator (16), a motor stator (8), Stator left end cover (5), pin shaft (6) and support plate (1) form a frame, which is fixed with the wheel shaft by set screw (11) and key (23); the set plate (13) and stator right end cover (16 ) is fixedly connected, the two ends of the motor stator (8) are fixedly connected with the stator left end cover (5) and the stator right end cover (16) respectively, and the stator left end cover (5) is connected with the support plate (1) through the pin shaft (6).

3. A driving device for an electric bicycle according to claim 2, characterized in that the hollow shaft (17) is supported on the left end cover (5) and the right end of the stator of the motor through bearings (18) and bearings (14) Cover (16).

4. A driving device for an electric bicycle according to claim 1, characterized in that the planetary gear transmission mechanism with small tooth difference consists of a pair of planetary gears (2), an internal gear (3), The eccentric sleeve (28) is formed, and the eccentric sleeve (28) is connected with the hollow shaft (17) through the seam screw (27); the planetary gear (2) meshes with the internal gear (3), and the internal gear (3) and the output disc (24) fixed.

5. A driving device for an electric bicycle according to claim 4, characterized in that: an oil deflecting ring (4) is provided on the right side of the internal gear (3).

6. A drive device for electric bicycles according to claim 2, characterized in that: the DC motor is fitted on the hollow shaft (17) through bearings, and the left end cover (5) of the stator and the support plate (1) pass through Pin shaft (6) is connected, and planetary gear (2) is sleeved on the pin shaft (6).