CN1134653C - Chain wheel type moment sensor - Google Patents
Chain wheel type moment sensor Download PDFInfo
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- CN1134653C CN1134653C CNB991139755A CN99113975A CN1134653C CN 1134653 C CN1134653 C CN 1134653C CN B991139755 A CNB991139755 A CN B991139755A CN 99113975 A CN99113975 A CN 99113975A CN 1134653 C CN1134653 C CN 1134653C
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- chain wheel
- spring
- shallow bid
- core shaft
- hole
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Abstract
The present invention relates to a sprocket torque sensing device which comprises a toothed disk, a small disc, a step tread crank, a step tread and a receiving device, wherein a spring is inlaid in a spring groove of the toothed disk, and a pressing block of a capping spring is extended on the small disc; a plurality of kidney-shaped through holes and transmitter through holes are arranged on the toothed disk at intervals; a plurality of transmitter through holes are also arranged on the small disc at intervals; corresponding transmitting devices are arranged in the transmitter through holes. When the small disc rotates, transmitting signals of the transmitting devices are received by the receiving device in succession, and the signals received by the receiving device are converted into control signals for driving a motor. The present invention has the advantages of simple structure and stable operation.
Description
The present invention relates to electric vehicle, relate more specifically to be used for the chain wheel type moment sensor of electronic (power-assisted) voluntarily car.
Electronic (power-assisted) voluntarily car is as a kind of pollution-free green vehicles, and it also can play body-building when reducing pollution, and its application prospect will be very wide.
In general, in order to improve the continual mileage of electric bicycle, require the user under steam, step on pedal, and exerting oneself of the motor of electric bicycle becomes certain ratio with user's the power of pedaling of stepping on, and this mode of travelling is called current in the world " X+1 ".For example, legal provisions electronic voluntarily (power-assist) car of Japan must be " X+1 ", i.e. power assist vehicle truly.How to carry out " X+1 ", just need to detect the driver under steam step on kinetic moment, promptly the X value in the formula so that the driver is under steam, changes the rotating speed of motor according to different travel speeds.The moment sensing device of existing electric bicycle is the detection of finishing moment in gear case, this structure is very complicated, driving gear drives follower gear by spring, follower gear drives a potentiometer again, with decision motor power output distance, this kind structure itself has determined that ratio is simulated between moment that pin is stepped on and the motor output torque.The shortcoming that this moment sensor exists mainly is a complex structure and huge; Dustproof poor, when silt dirt is bonded on the sensor, sensor signal is easily made mistakes, and potentiometer usually damages; If add dust shield case, this makes car load more complicated again.
For this reason, order of the present invention is the shortcoming that exists at above-mentioned moment speed pickup, proposes a kind of chain wheel type moment sensor of simple in structure, dependable performance.
To achieve these goals, the present invention adopts following technical scheme: this chain wheel type moment sensor includes chain wheel, shallow bid, pedal crank, pedal, the same circle core shaft of chain wheel and shallow bid, both all can rotate around circle core shaft, be furnished with the sprocket with chain engages on the chain wheel, shallow bid is riveted mutually with the pedal crank; It is characterized in that:
This device also further includes receiving device, and receiving device includes first Hall element and second Hall element, and described first Hall element built-in magnetic post on the distance of circle core shaft and the described chain wheel equates to the distance of circle core shaft; Described second Hall element built-in magnetic post on the distance of circle core shaft and the described shallow bid equates to the distance of circle core shaft;
Spaced apart several spring grooves that is provided with on the circumference of the intersection of described chain wheel and shallow bid, be embedded with spring in each spring groove, along also spaced apart several waist through hole that is provided with on the circumference of the same radius of chain wheel, on the circumference of the same radius of chain wheel and be positioned at spaced apart several transmitter through holes that is provided with in the waist through hole outside, the transmitter through hole is built-in with the magnetic post;
Described shallow bid extends the briquetting of the spring that bears down on one, and this briquetting is positioned at the spring corresponding section that chain wheel is embedded, and also spaced apart several transmitter through holes that is provided with in shallow bid and chain wheel waist through hole corresponding section are built-in with the magnetic post at this through hole.
In the present invention, constituted sprocket-type speed pickup of the present invention, and in the spring groove of chain wheel, be embedded with the briquetting that extends the spring that bears down on one on spring and the shallow bid by chain wheel, shallow bid, pedal crank, pedal and receiving device; Simultaneously, also spaced apart several waist through hole and the transmitter through hole of being provided with on the chain wheel, also spaced apart several transmitter through holes that is provided with all are provided with corresponding magnetic post on the shallow bid in the transmitter through hole of chain wheel and shallow bid.When shallow bid rotates under the drive of pedal crank, spring on the briquetting roof pressure chain wheel, make chain wheel and shallow bid when concentric shafts is rotated, chain wheel and shallow bid also produce relative rotation, magnetic post on the chain wheel transmit and shallow bid upper magnetic post transmitting all behind the mounting hole on the chain wheel successively received by Hall element, and two differences that transmit that Hall element received are just represented the amount that spring is pushed by briquetting, Hall element receives the control signal that signal is converted into the driving motor of may command electric motor car, therefore, the present invention compares with the moment sensor of original electric bicycle, and it has simple in structure, the advantage of working stability.
Below in conjunction with drawings and Examples, the present invention is described in further detail:
Fig. 1 looks synoptic diagram for composite sprocket structure master of the present invention.
Fig. 2 be Fig. 1's " A-A " to cross-sectional schematic.
Fig. 3 is a side-looking structural representation of the present invention.
Please consult Fig. 1-shown in Figure 3 respectively, this chain wheel type moment sensor includes a chain wheel 1, shallow bid 2, pedal crank 3, pedal 4, chain wheel 1 constitutes a composite sprocket with shallow bid 2, and chain wheel 1 and shallow bid 2 same circle core shafts 6 (circle core shaft 6 is illustrated as a straight line among the figure), both all can rotate around circle core shaft, be furnished with the sprocket 11 with chain engages on the chain wheel 1, shallow bid 2 is riveted mutually with pedal crank 3, and pedal 4 is articulated in the other end of pedal crank 3.This sensing device also includes receiving device 5.
Spaced apart several spring grooves 12 that is provided with on the circumference of described chain wheel 1 and shallow bid 2 intersection are embedded with spring 13 in each spring groove 12, and spring 13 can be a leaf spring.Along also spaced apart several waist through hole 14 that is provided with on the circumference of the same radius of chain wheel 1, on the circumference of the same radius of chain wheel and be positioned at spaced apart several transmitter through holes 15 that is provided with in waist through hole 14 outsides, transmitter through hole 15 is built-in with ballistic device 16.
In the present invention, the quantity of spring groove 12 and spring 13 has all adopted eight, and the quantity of waist through hole 14, transmitter through hole 15 and ballistic device 16 has also adopted eight.Certainly, the quantity of spring groove 12 and spring 13 is not limited to this; The quantity of same waist through hole 14, transmitter through hole 15, transmitter 16 also is not limited to the quantity of the embodiment of the invention.
Described shallow bid 2 extends the briquetting 21 of several springs that bear down on one, and this briquetting 21 is positioned at the spring corresponding section that chain wheel 1 is embedded, and briquetting 21 may extend in the spring groove 12 of chain wheel 1, and the spring 13 in the spring groove 12 that bears down on one.Shallow bid 2 and also spaced apart several transmitter through holes 22 that is provided with in chain wheel waist through hole 14 corresponding sections are built-in with ballistic device 23 at this through hole 22, and in an embodiment of the present invention, transmitter through hole 22 and built-in transmitter part 23 quantity are eight.
The quantity of described briquetting 21 is corresponding with spring 13 quantity in being embedded at chain wheel 1, in the present invention, adopts eight briquettings 21, and each briquetting 21 roof pressure is in a spring 13.Transmitter through hole 22 on the shallow bid 2 and ballistic device 23 are corresponding with the waist through hole 14 on the chain wheel 1.Along with the rotation of shallow bid 2 drive chain wheels 1, slide in the waist through hole 14 of the ballistic device 23 on the shallow bid 2 on chain wheel 1.Certainly, the quantity that adopted of the briquetting 21 on the shallow bid 2, transmitter through hole 22, ballistic device 23 also is not limited to this.
In the present invention, ballistic device 16 on the chain wheel 1 and the ballistic device 23 on the shallow bid 2 have all adopted the magnetic post, and said receiving device 5 is the magnetic flux receiver, as Hall element, the quantity that is adopted is two, first Hall element 51 is used to receive the magnetic flux that the ballistic device 16 on the chain wheel 1 sends, and second Hall element 52 is used to receive the magnetic flux that the ballistic device 23 on the shallow bid 2 sends, and two Hall elements are fixed on the car body as receiving device 5.
(in fact ballistic device 23 on the shallow bid 2 equates with the distance of first Hall element 52 to circle core shaft to the distance of circle core shaft 6, the magnetic post of shallow bid 2 and first Hall element 52 can be regarded as totally one axle, this distance to circle core shaft 6 equates), just ballistic device 23 and Hall element 52 are equal with respect to circle core shaft 6 radiuses.And (in fact the distance that the ballistic device 16 on the chain wheel 1 arrives circle core shaft 6 equates with the distance of second Hall element 51 to circle core shaft 6, the magnetic post of chain wheel 1 and second Hall element 51 can be regarded as totally one axle, this distance to circle core shaft 6 equates), equally, just ballistic device 16 and Hall element 51 are equal with respect to circle core shaft 6 radiuses.
The principles illustrated of chain wheel type moment sensor of the present invention is as follows: when the moving pedal 4 that tramps with one's feet turns clockwise, pedal 4 drives shallow bid 2 by pedal crank 3 and rotates, because the effect of bearing down on one of the briquetting 21 that extends on the shallow bid 2, the spring 13 that is embedded in the spring groove of chain wheel 1 is by original free state compressive deformation, and the deflection of spring 13 has reflected the size of pedal power.When spring 13 (initial time) when not being subjected to briquetting 21 roof pressures, spring 13 is free state.Ballistic device 16 in the chain wheel 1 (magnetic post) and the ballistic device 23 (magnetic post) in the shallow bid 2 are in two different radius of same radial line, that is to say, ballistic device 16 is 0 with the angle of ballistic device 23.And first Hall element 51 of receiving device 5 and second Hall element 52 receive the magnetic signal of ballistic device 16 and 23 simultaneously, along with the rotation of chain wheel 1 and shallow bid 2, first Hall element 51 and second Hall element, 51 compartment of terrains are receiving the magnetic signal of the magnetic post that is laid with at interval on each chain wheel 1 and the shallow bid 2.Two flux signal that Hall element received are identical, send into jointly in the control circuit of motor.When spring 13 when being subjected to briquetting 21 roof pressures, spring 13 equal compression block 21 roof pressures on the chain wheel 1, move in the waist through hole 14 of ballistic device 23 on the shallow bid 2 (magnetic post) on chain wheel 1, along with driver's pedal power change is big, the roof pressure power of 21 pairs of springs 13 of briquetting increases gradually, the deflection of spring 13 just increases gradually, then the angle of the ballistic device 23 on ballistic device on the chain wheel 16 and the shallow bid also increases simultaneously gradually, the difference of the flux signal that first Hall element 51 of receiving device 5 and second Hall element 52 are received is just big more, both differences depend on driver's pedal power, equally, the control circuit that two received flux signal of Hall element are delivered to motor is handled, so that realize the control of the mode of " X+1 " to motor, the rotating speed of motor correspondingly changes.
In sum, when the driver was driving, pedal power was big, the moment of driving motor is just big, and its speed is also just fast.Pedal power is little, and the moment of driving motor is just little, and its rotating speed is just slow.Therefore, after using chain wheel type moment sensor of the present invention, the speed detector structure of original electric bicycle is simplified greatly, save comparatively huge gear case, and made speed detector work more reliable.Make electronic (power-assisted) voluntarily car realization " power-assisted " truly.
Claims (3)
1, a kind of chain wheel type moment sensor, this chain wheel type moment sensor includes chain wheel, shallow bid, pedal crank, pedal, the same circle core shaft of chain wheel and shallow bid, and both all can rotate around circle core shaft, be furnished with the sprocket with chain engages on the chain wheel, shallow bid is riveted mutually with the pedal crank; It is characterized in that:
This device also further includes receiving device, and receiving device includes first Hall element and second Hall element, and described first Hall element built-in magnetic post on the distance of circle core shaft and the described chain wheel equates to the distance of circle core shaft; Described second Hall element built-in magnetic post on the distance of circle core shaft and the described shallow bid equates to the distance of circle core shaft;
Spaced apart several spring grooves that is provided with on the circumference of the intersection of described chain wheel and shallow bid, be embedded with spring in each spring groove, along also spaced apart several waist through hole that is provided with on the circumference of the same radius of chain wheel, on the circumference of the same radius of chain wheel and be positioned at spaced apart several transmitter through holes that is provided with in the waist through hole outside, the transmitter through hole is built-in with the magnetic post;
Described shallow bid extends the briquetting of the spring that bears down on one, and this briquetting is positioned at the spring corresponding section that chain wheel is embedded, and also spaced apart several transmitter through holes that is provided with in shallow bid and chain wheel waist through hole corresponding section are built-in with the magnetic post at this through hole.
2, chain wheel type moment sensor as claimed in claim 1 is characterized in that: offer the spring groove at eight intervals on the described chain wheel, the spring in each spring groove all adopts leaf spring.
3, chain wheel type moment sensor as claimed in claim 1 is characterized in that: the quantity of the magnetic post that magnetic post that described chain wheel is built-in and shallow bid are built-in is eight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991139755A CN1134653C (en) | 1999-08-12 | 1999-08-12 | Chain wheel type moment sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991139755A CN1134653C (en) | 1999-08-12 | 1999-08-12 | Chain wheel type moment sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1248699A CN1248699A (en) | 2000-03-29 |
| CN1134653C true CN1134653C (en) | 2004-01-14 |
Family
ID=5277107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991139755A Expired - Fee Related CN1134653C (en) | 1999-08-12 | 1999-08-12 | Chain wheel type moment sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1134653C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226727B (en) * | 2011-04-08 | 2013-03-20 | 深圳市琛玛华夏科技有限公司 | Torque sensor for electrical bicycles |
-
1999
- 1999-08-12 CN CNB991139755A patent/CN1134653C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1248699A (en) | 2000-03-29 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |