CN100534855C - Wheel drive device for bicycle - Google Patents
Wheel drive device for bicycle Download PDFInfo
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- CN100534855C CN100534855C CNB2005100771819A CN200510077181A CN100534855C CN 100534855 C CN100534855 C CN 100534855C CN B2005100771819 A CNB2005100771819 A CN B2005100771819A CN 200510077181 A CN200510077181 A CN 200510077181A CN 100534855 C CN100534855 C CN 100534855C
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Abstract
The invention relates to a bicycle wheel drive device, wherein the electromotor inner ring hub (20) includes ring hub axis (22), ring hub frame (24), drive part of the electromotor (26) and roller trig part (28). The ring hub frame (24) station to outer circle side of the ring hub axis (22), while outer circle side has ring hub flange (24a) which be provided with acceptance room (24b). The drive part of the electromotor (26) admits to the acceptance room (24b). That make ring hub frame (24) relatively circumgyrate to the ring hub axis (22). The roller trig device (28) setting in ring hub frame (24) lies to the outside of the acceptance room (24b). And the roller trig device (28) makes the trig parcel whole and the trig drum impaction by roller bunting and pressing trig parcel. Thereby, it can provide stabilization and enough break power.
Description
Technical field
The present invention relates to a kind of wheel driver, especially use the wheel drive device for bicycle of wheel driving motor.
Background technology
In recent years, utilize the power of electrical motor to wait to assist the cyclist very fast to the universal and development of the electrically assisted bicycle that scrunches of stretcher.Especially domestic in China, electrical motor is built in the Electrical Bicycle of the rotation of auxiliary drive wheels in the wheel hub and by wheel driving motor the cyclist need not to pedal stretcher Electrical Bicycle popularize and development very remarkable.
But these Electrical Bicycles need be installed electrical motor and power supply, and in general the deadweight of bicycle is heavier, and, because Electrical Bicycle is by direct motor drive or assistive drive, compares with ordinary bicycle and can run at high speed.Above-mentioned reason causes Electrical Bicycle, and inertia is bigger in the process of walking.But, still using cantilevered drg or internal expanding drg on a lot of Electrical Bicycles, there is the hypodynamic problem of braking in the drg that external contracting drum brake etc. use on ordinary bicycle.
In addition, in the open communique of Japanese Patent 2004-25941 number, a kind of electric motor built-in wheel hub that is installed on the Electrical Bicycle is disclosed.In the above-mentioned example, the electric motor built-in wheel hub has hub spindle and is used to protect the housing of wheel hub.Housing comprises: be fixed in fixation side housing and the hub shell (rotating cylinder) that covers hub spindle on the hub spindle.On the fixation side housing, be provided with the brake plate of internal expanding drg, and the brake wheel of internal expanding drg is fixed on the outstanding cylindrical portion that forms of the bearing support of hub shell.
When the electric machine built-in wheel hub is installed on bicycle, can cause the deadweight of bicycle to strengthen, and bicycle also can be run at high speed.Therefore, require drg to have bigger braking force.But what installed in the built-in wheel hub of the electrical motor of above-mentioned prior art is the internal expanding drg, so, have only the part of swing brake plate to contact with brake wheel.Its result when improving braking force, because of the friction heating that is produced that rubs mutually of brake plate and brake wheel also can increase, causes coefficient of friction to reduce, and is difficult to the braking force that provides stable and enough.
Summary of the invention
The objective of the invention is to, provide a kind of, can provide and stablize enough braking forces by electric motor driven wheel drive device for bicycle.
According to the wheel drive device for bicycle of first aspect present invention, comprise hub spindle, hub shell, direct motor drive portion and roller type brake equipment.Wherein, hub shell is configured in the outer circumferential side of hub spindle, and its periphery is provided with hub flange, and inside is provided with spatial accommodation; Direct motor drive portion is contained in spatial accommodation, and hub shell is rotated with respect to hub spindle; The roller type brake equipment is configured in the inside of hub shell and is positioned at the outside of spatial accommodation.
After this wheel driver being installed on the front-wheel or trailing wheel of bicycle, by the drive division drive hub housing that comprises electrical motor, bicycle can be walked.After this type of wheel driver was installed, the speed of a motor vehicle also can improve when the bicycle deadweight increased.Its result drives bicycle with common manpower and compares, and needs drg to have bigger braking force.At this, roller type brake is installed in hub shell, so, by roller pushing brake plate make brake plate whole with brake wheel crimping and realize brake operating mutually.Therefore, even braking force is very big, the friction heating between brake plate and the brake wheel is also less, and the difficult reduction of the coefficient of friction between brake plate and the brake wheel can provide stable and enough braking force.
According to the wheel drive device for bicycle of second aspect present invention, in the wheel drive device for bicycle of first aspect, the roller type brake equipment comprises: fixed mount is fixed on the bicycle; Cylindric brake wheel has brake surface on the inner circumferential surface, and is arranged to and can rotates with above-mentioned hub shell is whole; A plurality of brake plates have and the contacted contact surface of the brake surface of brake wheel, can not rotate with respect to fixed mount, and be used for brake action is heaved in braking; Loading component, radially afterburning inwardly to brake plate; Brake operating portion has: a plurality of rollers along the circumferential direction are provided with at regular intervals; And, cam mechanism, by the rotation with above-mentioned roller radially outwardly the pushing; Brake plate is crimped onto on the described brake wheel.At this, make cam mechanism when a certain direction is rotated, then brake plate is pressed to brake wheel, thereby realize braking wheel by roller; When cam mechanism is rotated round about, then make brake plate deviate from brake wheel, thereby remove braking wheel by loading component.
According to the wheel drive device for bicycle of third aspect present invention, first or the actuating device of second aspect in, also be provided with on the outer peripheral face of brake wheel and be used for brake wheel and hub shell bonded assembly connecting portion non-rotatably.At this moment, because brake wheel and hub shell respectively are one, so the maintenance of roller type brake is easier.
According to the wheel drive device for bicycle of fourth aspect present invention, in the device of the third aspect, connecting portion is for along the circumferential direction being arranged with the spline structure of a plurality of jogs.In this case, because connect brake wheel and hub shell, no matter the hand of rotation of hub shell how, all can pass to hub shell with powerful moment of torsion from brake wheel with braking force by spline structure with jog.
According to the wheel drive device for bicycle of fifth aspect present invention, in the device of the third aspect, connecting portion is that helicitic texture and hand of spiral are meeting threaded together when wheel is braked under the state of forward direction rotation.In this case, even because wheel is with respect to the rotation of brake wheel forward direction when being braked, screw thread can not unclamp on the contrary yet and be tightened, so can reliably braking force be passed to hub shell from brake wheel.
According to the wheel drive device for bicycle of sixth aspect present invention, in the device of the third aspect, brake wheel is supported on the hub spindle by bearing is rotatable freely; And the end that roller type brake one side is installed of hub shell is bearing on the hub spindle freely by brake wheel is rotatable.Like this, can guarantee the level and smooth rotation of brake wheel.
In the present invention, roller type brake is installed in hub shell, so, by roller pushing brake plate make brake plate whole with brake wheel crimping and realize brake operating mutually.Therefore, even braking force is very big, the friction heating between brake plate and the brake wheel is also less, and the coefficient of friction between brake plate and the brake wheel also is difficult for reducing, and stable and powerful braking force can be provided.Therefore, when being installed, wheel driver causes also providing stable and enough braking force under the deadweight increasing of bicycle and the situation that the speed of a motor vehicle improves.
Description of drawings
Fig. 1 is the lateral plan that adopts the bicycle of one embodiment of the invention;
Fig. 2 is the fragmentary sectional elevation view of the built-in wheel hub of electrical motor;
Fig. 3 is near the cross section enlarged drawing of roller type brake mounting and connection parts of the built-in wheel hub of electrical motor;
Fig. 4 is the front elevation of roller type brake equipment;
Fig. 5 is an expression roller type brake equipment in-to-in cutaway view; And
Fig. 6 is the figure that is equivalent to Fig. 3 of other embodiment.
The specific embodiment
As shown in Figure 1, the bicycle 10 that one embodiment of the invention is installed comprises: contain the vehicle frame 12 of front fork 12a, the front-wheel 14 that is disposed at vehicle frame 12 front and back and trailing wheel 16, be used for driving with manpower the manpower drive division 18 of trailing wheel 16.Manpower drive division 18 comprises preceding sprocket wheel, back sprocket wheel, chain, crank etc.The central part of trailing wheel 16 is equipped with the built-in wheel hub of electrical motor (example of bicycle driving device) 20 that is used for driving with the electrical motor rotation trailing wheel 16.
As shown in Figure 2, the built-in wheel hub 20 of electrical motor comprises: hub spindle 22 can be installed on the rearward end of the vehicle frame 12 of bicycle 10; Hub shell 24 is disposed at the outer circumferential sides of hub spindle 22, and inside has spatial accommodation 24b; Motor drive 26 is contained in the spatial accommodation 24b, makes hub shell 24 with respect to hub spindle 22 rotations; And, roller type brake equipment 28, be arranged on the inside of hub shell 24 and be positioned at the outside of spatial accommodation 24b.
The excircle of hub shell 24 is provided with a pair of hub flange 24a, and the spoke 16b by as shown in Figure 1 links to each other with the wheel rim 16a of trailing wheel 16.The left end of hub shell 24 (shown in Figure 2) is provided with drg installation portion 24c cylindraceous, is used for that roller type brake equipment 28 is configured in the outside of spatial accommodation 24b and in the inside of hub shell 24.As shown in Figure 3, the inner peripheral surface of drg installation portion 24c is provided with jog 24d, is used for brake wheel 40 described later non-rotatably is connected with hub shell 24.Jog 24d is so-called serration or spline, and it is formed with for example lug boss of the width about 1～3mm in a circumferential direction at interval.As shown in Figure 2, direct motor drive portion 26 is fixed on the hub spindle 22, by electrical motor hub shell 24 is rotated.
To shown in Figure 5, roller type brake equipment 28 comprises as Fig. 3: brake wheel 40, be installed on the vehicle frame 12 and the fixed mount 42 that can not rotate, be crimped on the brake plate 44 that carries out brake operating on the brake wheel 40, with brake plate 44 to the retracing spring (example of loading component) 54 of radially inner side pushing and make brake plate 44 be crimped on the brake operating portion 46 of brake wheel 40.
As shown in Figure 3, brake wheel 40 comprises for the bottom tube-like structure is arranged: can with the barrel-contoured drum body 50 of hub shell 24 one rotations, and and the integrally formed discoid support sector 52 of drum body 50.The inner peripheral surface of drum body 50 is formed with brake surface 50a.Brake surface 50a is made of smooth periphery, is formed with the lubricating oil filling slot 50b of three ring-types on brake surface 50a vertically side by side.Be formed with jog (example of connecting portion) 50c on drum body 50 outer peripheral faces, but the jog 24d one that is used on the drg installation portion 24c with hub shell 24 is connected rotatably.Jog 50c is so-called serration or spline, and it is formed with for example lug boss of the width about 1～3mm in a circumferential direction at interval.Be formed with bearing installation face 52a on the inner peripheral surface of support sector 52, with on hub spindle 22, be equipped with in the foreign steamer 38b of bearing 38 of wheel 38a contact.By this structure, brake wheel 40 rotatable being supported in freely on the hub spindle 22.Therefore, in the present embodiment, the left end of hub shell 24 turns by brake wheel 40 and is supported in freely on the hub spindle 22.
Fixed mount 42 is installed on the hub spindle 22 and with respect to vehicle frame 12 and does not rotate.When fixed mount 42 stops the rotation of brake plate 44, be held in brake operating portion 46 rotatable.Fixed mount 42 is by being installed on the hub spindle 22 at the captive nut 80 that is screwed on the hub spindle 22.
Brake plate 44 is the parts that for example are divided into three ring-types, stops under the state that rotates at the frame 42 that is fixed and disposes.By retracing spring 54 brake plate 44 is pushed to the direction that deviates from brake surface 50a (radially inner side).Retracing spring 54 is for being bent into elastic wire the ring-spring parts that circle forms.
Have in the roller type brake equipment 28 of this structure, in operation brake rod 72 stretches during hawser 70a (moving) to Fig. 4 left, operation arm 60 is clockwise direction rotation in Fig. 4 around hub spindle 22, also rotate with the cam part 62 of operation arm 60 unitary rotation, roller 64 is moved to radial outside, and brake plate 44 is crimped on the brake surface 50a of brake wheel 40.When discharging brake rod 72, interior hawser 70a recovers former state, operation arm 60 anticlockwise motion in Fig. 4.The result is, removes the crimping of roller 64, utilizes retracing spring 54, and brake plate 44 moves to the radially inner side that deviates from brake surface 50a.
At this, because roller type brake 28 is installed in hub shell 24, so, the integral body that makes brake plate 44 by roller 64 pushing brake plates 44 and the brake surface 50a of brake wheel 40 crimping and realize brake operating mutually.Therefore, even braking force is very big, the friction heating between brake plate and the brake wheel is also less, and the coefficient of friction between brake plate and the brake wheel also is difficult for reducing, and stable and powerful braking force can be provided.Therefore, when being installed, wheel driver causes also providing stable and enough braking force under the deadweight increase of bicycle and the situation that the speed of a motor vehicle improves.
Other embodiment
(a) in the above-described embodiments, be that example is illustrated with the built-in wheel hub of electrical motor that is installed on the trailing wheel, but be installed on also applicable the present invention on the built-in wheel hub of the electrical motor that is located on the front-wheel.
(b) in the above-described embodiments, but the engagement by jog 24d and 50c with brake wheel 40 and hub shell 24 unitary rotation link together.But, as shown in Figure 6, but also can by helicitic texture with brake wheel 140 unitary rotation of roller type brake 128 be connected on the drg installation portion 124c.As shown in Figure 6, be formed with internal thread part 124d on the inner peripheral surface of the drg installation portion 124c of hub shell 124.And on the inner peripheral surface of the braking tympanic part 150 of brake wheel 140, be formed with the outside thread 150c that is meshed with negative thread 124d.The hand of spiral of these screw threads 124d and 150c is: can threaded together when trailing wheel 16 is braked under the state of forward direction rotation.In Fig. 6, to see over from the rear of bicycle, roller type brake equipment 128 is arranged on the left side of hub shell 124, and institute thinks right-hand thread.Same as the previously described embodiments because of other formation, omit its explanation at this.
Symbol description
The built-in wheel hub of 20 motor
24 hub shells
24a hub flange section
24b holds the space
26 Motor Drive sections
28,128 roller type brakes
40,140 brake wheels
42 fixed mounts
44 brake plates
46 brake operating portions
The 50a brake surface
The 50c jog
54 retracing springs
62 cam parts
64 rollers
The 150c outside thread
Claims (5)
1. a wheel drive device for bicycle is characterized in that, comprising:
Hub spindle;
Hub shell is configured in the outer circumferential side of described hub spindle, and its periphery is provided with hub flange, and inside is provided with spatial accommodation;
Direct motor drive portion is contained in the described spatial accommodation, is used to make described hub shell to rotate with respect to described hub spindle;
The roller type brake equipment is configured in the inside of described hub shell and is positioned at the outside of described spatial accommodation,
Wherein, described roller type brake equipment comprises:
Fixed mount can be fixed on the described bicycle;
Cylindric brake wheel, inner circumferential surface is provided with brake surface, and is arranged to and can rotates with described hub shell one;
A plurality of brake plates, comprise can with the contacted contact surface of described brake surface of described brake wheel, can not rotate with respect to described fixed mount, and be used for brake action is heaved in described braking;
Loading component is to additional radially inwardly the load of described brake plate;
Brake operating portion comprises: a plurality of rollers along the circumferential direction are provided with at regular intervals; Cam mechanism radially pushes described roller outwardly by rotation; Be used for described brake plate is crimped onto described brake wheel.
2. wheel drive device for bicycle according to claim 1 is characterized in that, also is provided with connecting portion on the outer peripheral face of described brake wheel, and described brake wheel non-rotatably is connected with described hub shell.
3. wheel drive device for bicycle according to claim 1 is characterized in that, described brake wheel is supported on the described hub spindle freely by bearing is rotatable; And the end that described roller type brake one side is installed of described hub shell is supported on the described hub spindle freely by described brake wheel is rotatable.
4. wheel drive device for bicycle according to claim 2 is characterized in that, described connecting portion is for along the circumferential direction being arranged with the spline structure of a plurality of jogs.
5. wheel drive device for bicycle according to claim 2 is characterized in that, described connecting portion is that screw thread and hand of spiral are meeting threaded together when described wheel is braked under the state of forward direction rotation.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100771819A CN100534855C (en) | 2005-06-17 | 2005-06-17 | Wheel drive device for bicycle |
| TW095113993A TW200700282A (en) | 2005-06-17 | 2006-04-19 | Bicycle wheel driving device |
| EP06012175A EP1733962A3 (en) | 2005-06-17 | 2006-06-13 | Bicycle wheel driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100771819A CN100534855C (en) | 2005-06-17 | 2005-06-17 | Wheel drive device for bicycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1880164A CN1880164A (en) | 2006-12-20 |
| CN100534855C true CN100534855C (en) | 2009-09-02 |
Family
ID=37518573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100771819A Active CN100534855C (en) | 2005-06-17 | 2005-06-17 | Wheel drive device for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100534855C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105780574A (en) * | 2016-04-05 | 2016-07-20 | 李理 | Screen cylinder brake device of screw press washer |
| CN107839825B (en) * | 2017-03-15 | 2023-04-07 | 慈溪市凯质车业有限公司 | Bicycle expansion brake hub assembly |
-
2005
- 2005-06-17 CN CNB2005100771819A patent/CN100534855C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN1880164A (en) | 2006-12-20 |
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