CN201834167U - Electric bicycle torque and speed sensor - Google Patents
Electric bicycle torque and speed sensor Download PDFInfo
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- CN201834167U CN201834167U CN2010205798886U CN201020579888U CN201834167U CN 201834167 U CN201834167 U CN 201834167U CN 2010205798886 U CN2010205798886 U CN 2010205798886U CN 201020579888 U CN201020579888 U CN 201020579888U CN 201834167 U CN201834167 U CN 201834167U
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Abstract
The utility model discloses an electric bicycle torque and speed sensor, which comprises a central shaft, a crankset, a crank, a deformation frame, a rotating part and a fixed part, wherein the crank is fixed onto the central shaft. The deformation frame includes an outer ring and an inner ring which are connected by a plurality of radial connecting ribs, wherein the inner ring is fastened to the crank, and the outer ring is fastened to the crankset. Two torque induction steel magnets are fixed onto the inner ring, polarities of the outer surfaces of the two torque induction steel magnets are opposite, a signal output board fixed onto the outer ring is provided with linear hall elements, induction surfaces of the linear hall elements are opposite to the outer surfaces of the steel magnets, the rotating part and the fixed part are coaxially sleeved on the central shaft, an secondary winding is fixed onto the rotating part, a primary winding and a signal receiving board are fixed onto the fixed part, the primary winding and the secondary winding jointly form an isolating deformer, the primary winding is electrically connected with an alternating-current generator arranged on the signal receiving board provided with an outgoing line, and the secondary winding is electrically connected with the signal output board. The electric bicycle torque and speed sensor is fine in operating stability and sensitiveness.
Description
Technical field
The utility model relates to a kind of Electrical Bicycle moment and speed sensor.
Background technology
Electrical Bicycle since its brisk characteristics such as laborsaving and pollution-free promote the use in China just day by day.Traditional Electrical Bicycle all comes speed governing with handle, and also useful speed sensor is controlled the so-called intelligent electric bicycle of the horsepower output of motor, and it is very light that the characteristics of this class intelligent electric bicycle are to ride in the level land, but the very effort of going up a slope.The Electrical Bicycle of employing moment and speed sensor then just in time in contrast, the horsepower output of motor is very little when ride in the level land, can allow the people feel to ride easily very power saving again, and exportable bigger electric current makes climbing become very laborsaving when going up a slope, and is a kind of real Electrical Bicycle that can allow the people experience the natural fusion of people and machine.Though yet domestic present also have moment and speed sensor, but effect is barely satisfactory, mainly be when low speed, can not export normal torque signals, strength when causing starting or excessive, too small, can't accomplish man-machine harmony, signal of sensor was saturated too early again when also existence was firmly ridden, cause upward slope unable, single-piece working stability and susceptibility are all relatively poor.Though external (particularly Japan) has this series products for a long time, but complex structure, manufacture difficulty and cost are all very high, and the sensor pig-tail wire also is wound on the bicycle middle shaft easily, there is a conversion difficult problem of rotating between electric signal and static electric signal, makes this class Electrical Bicycle not popularize very soon.
Summary of the invention
The utility model purpose is: better Electrical Bicycle moment of a kind of working stability and susceptibility and speed sensor are provided.
The technical solution of the utility model is: a kind of Electrical Bicycle moment and speed sensor, comprise axis, chain wheel and be fixed on crank on the axis, it is characterized in that also comprising Deformable rack, described Deformable rack comprises outer ring and the inner ring that links to each other by some radial dowels, wherein inner ring and crank are fastening, and outer ring and chain wheel are fastening; And be fixed with two moment inductive magnetic steels on the inner ring, the outside face polarity of these two moment inductive magnetic steels is opposite, and be fixed with the signal output plate on the outer ring, and linear hall element is housed on the described signal output plate, the sensitive surface of described linear hall element is relative with the outside face of two magnet steel; Also comprise coaxial revolving part and the static element that is placed on the axis, one in the same chain wheel of described revolving part, Deformable rack, crank and the axis fixes, and is fixed with the secondary winding on it; And static element keeps not rotating relative to revolving part, be fixed with former limit winding and signal dash receiver on it, the common isolating transformer of forming of described former and deputy limit winding, its limit, Central Plains winding is electrically connected with the alternating current producer that the signal dash receiver is provided with, and the signal dash receiver is provided with pig-tail wire; The secondary winding then is electrically connected with the signal output plate.
Further, the winding of secondary described in the utility model together constitutes by being fixed on the ring-type rotation magnetic jar on the revolving part and being located at the rotating coil that rotates in the magnetic jar; Former limit winding then together is made of the stationary coil that is fixed on the static magnetic jar of ring-type on the static element and be located in the static magnetic jar, described rotation magnetic jar and static magnetic jar lump together the formation C/LOOP, and together constitute isolating transformer with in-to-in rotating coil and stationary coil, described stationary coil is the equal of the primary coil of isolating transformer, and it is electrically connected with the alternating current producer that the signal dash receiver is provided with; And rotating coil is the equal of the secondary coil of isolating transformer, and it is electrically connected with the signal output plate.
Further, be arranged with bottom bracket cup described in the utility model on the axis, described bottom bracket cup by screw threads for fastening on the center tap that links to each other with the vehicle frame of Electrical Bicycle, clamping between described center tap and the bottom bracket cup has the spline sheet of offering groove, and described static element is provided with the dog link in going into described groove.
Further, revolving part described in the utility model is provided with the some velocity response magnet steel that are circle distribution, on the described signal dash receiver switch Hall element is housed, and the sensitive surface of described switch Hall element with velocity response magnet steel surface relatively.
Further, also be fixed with the protective cover that covers Deformable rack described in the utility model on the crank.
Further, static element described in the utility model and revolving part is axially fixed by snap.
Principle of work of the present utility model is as follows:
As people by bike the time, crank will drive chain wheel by Deformable rack and rotate, the same with routine techniques, chain to be installed on the described chain wheel drive bicycle, and can applying a moment of reaction to Deformable rack by chain wheel, chain reaches balance, because chain wheel and crank are separately fixed at the outer ring and the inner ring of Deformable rack, therefore two rightabout moment is applied to the outer ring and the inner ring of Deformable rack respectively, make the outer ring and the inner ring of Deformable rack be out of shape dislocation, and then cause the relative position of linear hall element and two moment inductive magnetic steels to change because of stressed.Since two moment inductive magnetic steels the sensitive surface of linear hall element produce among a small circle one from the N utmost point to the S utmost point near linear Distribution of Magnetic Field, so the sensitive surface of linear hall element also changes because of its magnetic field of passing through and has influence on the variation of its output voltage after the relative position of linear hall element and two moment inductive magnetic steels changes.The effect of described signal output plate is by the electronic circuit on it output voltage of linear hall element to be converted to a corresponding with it variable load.
Revolving part in the utility model and static element are coaxial when being assemblied on the axis, described rotation magnetic jar and static magnetic jar lump together the formation C/LOOP, and together constitute isolating transformer with in-to-in rotating coil and stationary coil, described stationary coil is the equal of the primary coil of isolating transformer, and it is electrically connected with the alternating current producer that the signal dash receiver is provided with; And rotating coil is the equal of the secondary coil of isolating transformer, and it is electrically connected with the signal output plate.The alternating current producer of installing on the signal dash receiver is powered to stationary coil, promptly be that primary coil to isolating transformer provides alternating current, because secondary coil (the being rotating coil) bonded assembly of isolating transformer is a variable load, so the electric current of its former avris can change along with the variation of secondary side variable load, the variation of this electric current is carried out treatment conversion by the signal dash receiver become voltage output promptly to finish the detection of moment.
Because the utility model is when concrete work, revolving part rotates along with the rotation of chain wheel and Deformable rack, static element is not then because the effect of dog link and spline sheet can transfer, therefore make the pig-tail wire on the signal dash receiver that fixes with static element can keep motionless, can not resemble and often be wound to the prior art on the axis and cause loss, cause stable output signal decline, solved a difficult problem by the electric signal of the electric signal convert to static that rotates.
Simultaneously, the utility model also can carry out the detection of speed, during the Electrical Bicycle running, revolving part rotates with chain wheel, and the switch Hall element is static, the some velocity response magnet steel that are circle distribution so just can make the switch Hall element senses and export corresponding velocity pulse voltage signal continuously by the sensitive surface of switch Hall element, and this signal is undertaken exporting by pig-tail wire after corresponding signal is handled by the signal dash receiver at last.
The utility model has the advantages that:
1. this Electrical Bicycle moment and the speed sensor that provide of the utility model, it is together measured people's pedal power by custom-designed Deformable rack and moment inductive magnetic steel provided thereon and linear hall element and puts on moment on the crank, measures the susceptibility height; The present invention simultaneously again customized design the isolating transformer that is divided on static, the revolving part of a kind of former and deputy winding export the Hall voltage signal that records, utilize this transformer principle, solved a difficult problem dexterously with rotating signal convert to static signal, and stable signal transmission is good, has improved integral working performances of the present invention and survey precision greatly.
2. this Electrical Bicycle moment and the speed sensor that provide of the utility model, during concrete work, revolving part rotates along with the rotation of chain wheel and Deformable rack, static element is not then because the effect of dog link and spline sheet can transfer, therefore make the pig-tail wire on the signal dash receiver that fixes with static element can keep motionless, solved a difficult problem by the electric signal of the electric signal convert to static that rotates.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is a perspective view of the present utility model;
Fig. 2 is the perspective view at Fig. 1 reverse side visual angle.
Wherein: 1, axis; 2, chain wheel; 3, crank; 4, Deformable rack; 4a, outer ring; 4b, inner ring; 4c, dowel; 5, signal output plate; 6, linear hall element; 7, revolving part; 8, static element; 9, signal dash receiver; 10, pig-tail wire; 11, rotate the magnetic jar; 12, rotating coil; 13, static magnetic jar; 14, stationary coil; 15, bottom bracket cup; 16, center tap; 17, spline sheet; 18, dog link; 19, switch Hall element; 20, protective cover; A, moment inductive magnetic steel; B, velocity response magnet steel.
The specific embodiment
Embodiment: in conjunction with Fig. 1, shown in Figure 2, this Electrical Bicycle moment that present embodiment provides and speed sensor by axis 1, chain wheel 2, be fixed on crank 3 on the axis 1, Deformable rack 4, signal output plate 5, linear hall element 6, revolving part 7, static element 8, signal dash receiver 9, pig-tail wire 10, rotate magnetic jar 11, rotating coil 12, static magnetic jar 13, stationary coil 14, bottom bracket cup 15, center tap 16, spline sheet 17, dog link 18, switch Hall element 19 and protective cover 20 and together form.
Deformable rack described in the present embodiment 4 is constituted (only having shown Deformable rack 4 among Fig. 1 half) by outer ring 4a, inner ring 4b and 10 dowel 4c being connected between the inside and outside circle radially, wherein inner ring 4b and crank 3 are fastening by screw, and outer ring 4a and chain wheel 2 are also fastening by screw; And be fixed with two moment inductive magnetic steel A on the inner ring 4b, the outside face polarity of these two moment inductive magnetic steel A is opposite, and be fixed with signal output plate 5 on the 4a of outer ring, on the described signal output plate 5 linear hall element 6 is housed, the sensitive surface of described linear hall element 6 is relative with the outside face of two magnet steel A.
Revolving part described in the present embodiment 7 and static element 8 coaxial being placed on the axis 1, and described revolving part 7 is provided with 4 buckles (not marking among the figure) and fastens static element 8, thus make revolving part 7 and static element 8 axial restraints.Described revolving part 7 fixes by screw with Deformable rack 4, so it can together rotate in company with axis 1, chain wheel 2, crank 3 and Deformable rack 4; Be arranged with bottom bracket cup 15 on the axis 1 described in the present embodiment simultaneously, described bottom bracket cup 15 by screw threads for fastening on the center tap 16 that links to each other with the vehicle frame of Electrical Bicycle, clamp between described center tap 16 and the bottom bracket cup 15 the spline sheet 17 of offering groove is arranged, described static element 8 is provided with the dog link 18 in going into described groove, thereby makes static element 8 to keep motionless by relative revolving part 7 by the cooperation of dog link 18 and spline sheet 17.
Be fixed with the secondary winding on the revolving part 7 in the present embodiment, this secondary winding together constitutes by being fixed on the ring-type rotation magnetic jar 11 on the revolving part 7 and being located at the rotating coils 12 that rotate in the magnetic jar 11; And be fixed with former limit winding and signal dash receiver 9 on the static element 8, this former limit winding then together constitutes by being fixed on static magnetic jar 13 of ring-type on the static element 8 and the stationary coil of being located in the static magnetic jar 13 14, described rotation magnetic jar 11 and static magnetic jar 13 lump together the formation C/LOOP, and together constitute isolating transformer with in-to-in rotating coil 11 and stationary coil 14, described stationary coil 14 is the equal of the primary coil of isolating transformer, and it is electrically connected with the alternating current producer that signal dash receiver 9 is provided with; And rotating coil 12 is the equal of the secondary coil of isolating transformer, and it is electrically connected with signal output plate 5.Described pig-tail wire 10 is located on the signal dash receiver 9.
Revolving part described in the present embodiment 7 is provided with 20 velocity response magnet steel B that are circle distribution, on the described signal dash receiver 9 switch Hall element 19 is housed, and the sensitive surface of described switch Hall element 19 with described velocity response magnet steel B surface relatively.
On crank 3, this protective cover 20 covers Deformable rack 4 to protective cover 20, and it is protected by screw retention in the present embodiment.
The principle of work of present embodiment is as follows:
As people by bike the time, crank 3 will drive chain wheel by Deformable rack 4 and rotate, the same with routine techniques, on the described chain wheel 2 chain to be installed and drive bicycle, and can applying a moment of reaction by 2 pairs of Deformable racks 4 of chain wheel, chain reaches balance, because chain wheel 2 and crank 3 are separately fixed at the outer ring 4a and the inner ring 4b of Deformable rack 4, therefore two rightabout moment is applied to the outer ring 4a and the inner ring 4b of Deformable rack 4 respectively, make the outer ring 4a and the inner ring 4b of Deformable rack 4 be out of shape dislocation, and then cause the relative position of linear hall element 6 and two moment inductive magnetic steel A to change because of stressed.Since two moment inductive magnetic steel A the sensitive surface of linear hall element 6 produce among a small circle one from the N utmost point to the S utmost point near linear Distribution of Magnetic Field, so the sensitive surface of linear hall element 6 also changes because of its magnetic field of passing through and has influence on the variation of its output voltage after the relative position of linear hall element 6 and two moment inductive magnetic steel A changes.The effect of described signal output plate 5 is by the electronic circuit on it output voltage of linear hall element 6 to be converted to a corresponding with it variable load.
Revolving part 7 in the present embodiment and static element 8 are coaxial when being assemblied on the axis 1, described rotation magnetic jar 11 and static magnetic jar 13 lump together the formation C/LOOP, and together constitute isolating transformer with in-to-in rotating coil 12 and stationary coil 14, described stationary coil 14 is the equal of the primary coil of isolating transformer, and it is electrically connected with the alternating current producer that signal dash receiver 9 is provided with; And rotating coil 12 is the equal of the secondary coil of isolating transformer, and it is electrically connected with signal output plate 5.The alternating current producer of installing on the signal dash receiver 9 gives stationary coil 14 power supplies, promptly be that primary coil to isolating transformer provides alternating current, because secondary coil (the being rotating coil 12) bonded assembly of isolating transformer is a variable load, so the electric current of its former avris can change along with the variation of secondary side variable load, the variation of this electric current is carried out treatment conversion by signal dash receiver 9 become voltage output promptly to finish the detection of moment.
Because present embodiment is when concrete work, revolving part 7 rotates along with the rotation of chain wheel 2 and Deformable rack 4, static element 8 is not then because the effect of dog link 18 and spline sheet 17 can transfer, therefore make the pig-tail wire 10 on the signal dash receiver 9 that fixes with static element 8 can keep motionless, can not resemble and often be wound to the prior art on the axis 1 and cause loss, cause stable output signal decline, solved a difficult problem by the electric signal of the electric signal convert to static that rotates.
Simultaneously, present embodiment also can carry out the detection of speed, during the Electrical Bicycle running, revolving part 7 rotates with chain wheel 2, and switch Hall element 19 is static, 20 velocity response magnet steel B that are circle distribution so just can make 19 inductions of switch Hall element and export corresponding velocity pulse voltage signal continuously by the sensitive surface of switch Hall element 19, and this signal carries out corresponding signal by signal dash receiver 9 at last and handles the back by pig-tail wire 10 outputs.
Claims (6)
1. Electrical Bicycle moment and speed sensor, comprise axis (1), chain wheel (2) and be fixed on crank (3) on the axis (1), it is characterized in that also comprising Deformable rack (4), described Deformable rack (4) comprises by some radial dowels (4c) continuous outer ring (4a) and inner ring (4b), wherein inner ring (4b) is fastening with crank (3), and outer ring (4a) is fastening with chain wheel (2); And be fixed with two moment inductive magnetic steels (A) on the inner ring (4b), the outside face polarity of these two moment inductive magnetic steels (A) is opposite, and be fixed with signal output plate (5) on outer ring (4a), linear hall element (6) is housed on the described signal output plate (5), and the sensitive surface of described linear hall element (6) is relative with the outside face of two magnet steel (A); Also comprise coaxial revolving part (7) and the static element (8) that is placed on the axis (1), one in the same chain wheel of described revolving part (7) (2), Deformable rack (4), crank (3) and the axis (1) fixes, and is fixed with the secondary winding on it; And static element (8) keeps not rotating relative to revolving part (7), be fixed with former limit winding and signal dash receiver (9) on it, the common isolating transformer of forming of described former and deputy limit winding, its limit, Central Plains winding is electrically connected with the alternating current producer that signal dash receiver (9) is provided with, and signal dash receiver (9) is provided with pig-tail wire (10); The secondary winding then is electrically connected with signal output plate (5).
2. Electrical Bicycle moment according to claim 1 and speed sensor is characterized in that described secondary winding together constitutes by being fixed on the ring-type rotation magnetic jar (11) on the revolving part (7) and being located at the rotating coil (12) that rotates in the magnetic jar (11); Former limit winding then together is made of the stationary coil (14) that is fixed on the static magnetic jar of ring-type (13) on the static element (8) and be located in the static magnetic jar (13), described rotation magnetic jar (11) and static magnetic jar (13) lump together the formation C/LOOP, and together constitute isolating transformer with in-to-in rotating coil (11) and stationary coil (14), described stationary coil (14) is the equal of the primary coil of isolating transformer, and it is electrically connected with the alternating current producer that signal dash receiver (9) is provided with; And rotating coil (12) is the equal of the secondary coil of isolating transformer, and it is electrically connected with signal output plate (5).
3. Electrical Bicycle moment according to claim 1 and 2 and speed sensor, it is characterized in that being arranged with on the described axis (1) bottom bracket cup (15), described bottom bracket cup (15) by screw threads for fastening on the center tap (16) that links to each other with the vehicle frame of Electrical Bicycle, clamping between described center tap (16) and the bottom bracket cup (15) has the spline sheet (17) of offering groove, and described static element (8) is provided with the dog link (18) in going into described groove.
4. Electrical Bicycle moment according to claim 1 and 2 and speed sensor, it is characterized in that described revolving part (7) is provided with the some velocity response magnet steel (B) that are circle distribution, switch Hall element (19) is housed on the described signal dash receiver (9), and the sensitive surface of described switch Hall element (19) with described velocity response magnet steel (B) surface relatively.
5. Electrical Bicycle moment according to claim 1 and 2 and speed sensor is characterized in that also being fixed with on the described crank (3) protective cover (20) that covers Deformable rack (4).
6. Electrical Bicycle moment according to claim 1 and 2 and speed sensor is characterized in that the axially fixed by snap of described static element (8) and revolving part (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205798886U CN201834167U (en) | 2010-10-28 | 2010-10-28 | Electric bicycle torque and speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205798886U CN201834167U (en) | 2010-10-28 | 2010-10-28 | Electric bicycle torque and speed sensor |
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| Publication Number | Publication Date |
|---|---|
| CN201834167U true CN201834167U (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205798886U Expired - Lifetime CN201834167U (en) | 2010-10-28 | 2010-10-28 | Electric bicycle torque and speed sensor |
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| CN (1) | CN201834167U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973357A (en) * | 2010-10-28 | 2011-02-16 | 苏州工业园区同盛车业有限公司 | Moment and speed sensor of electric bicycle |
| CN102514676A (en) * | 2011-12-29 | 2012-06-27 | 苏州博菲利电动科技有限公司 | Electric bicycle transmission system with speed sensing device |
| CN102785746A (en) * | 2012-07-28 | 2012-11-21 | 成都宽和科技有限责任公司 | Power assisting bicycle with adjustable magnet block position sensor on flywheel |
| WO2013086855A1 (en) * | 2011-12-15 | 2013-06-20 | Lu Yonggang | Torque sensor integrated with motor of electric bicycle |
| WO2015120644A1 (en) * | 2014-02-11 | 2015-08-20 | 苏州工业园区同盛车业有限公司 | Central shaft torque sensing device of electric bicycle |
| WO2016045181A1 (en) * | 2014-09-25 | 2016-03-31 | 苏州工业园区同盛车业有限公司 | Middle-mounted motor of an electric bicycle and moment sensing device thereof |
| CN107054542A (en) * | 2017-01-03 | 2017-08-18 | 苏州工业园区同盛车业有限公司 | Wheel hub motor with torque sensing function and the electric bicycle using the motor |
| CN110053700A (en) * | 2018-01-19 | 2019-07-26 | 什拉姆有限责任公司 | Bicycle ergometer |
| WO2024183531A1 (en) * | 2023-03-06 | 2024-09-12 | 上海微熹动力科技有限公司 | Wireless transmission bicycle crankset spoke-type torque sensor |
-
2010
- 2010-10-28 CN CN2010205798886U patent/CN201834167U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973357A (en) * | 2010-10-28 | 2011-02-16 | 苏州工业园区同盛车业有限公司 | Moment and speed sensor of electric bicycle |
| CN101973357B (en) * | 2010-10-28 | 2012-08-15 | 苏州工业园区同盛车业有限公司 | Moment and speed sensor of electric bicycle |
| WO2013086855A1 (en) * | 2011-12-15 | 2013-06-20 | Lu Yonggang | Torque sensor integrated with motor of electric bicycle |
| CN102514676A (en) * | 2011-12-29 | 2012-06-27 | 苏州博菲利电动科技有限公司 | Electric bicycle transmission system with speed sensing device |
| CN102785746A (en) * | 2012-07-28 | 2012-11-21 | 成都宽和科技有限责任公司 | Power assisting bicycle with adjustable magnet block position sensor on flywheel |
| CN102785746B (en) * | 2012-07-28 | 2014-02-05 | 成都宽和科技有限责任公司 | Power-assisted bicycle with adjustable magnet block position sensor on flywheel |
| WO2015120644A1 (en) * | 2014-02-11 | 2015-08-20 | 苏州工业园区同盛车业有限公司 | Central shaft torque sensing device of electric bicycle |
| WO2016045181A1 (en) * | 2014-09-25 | 2016-03-31 | 苏州工业园区同盛车业有限公司 | Middle-mounted motor of an electric bicycle and moment sensing device thereof |
| JP2017522232A (en) * | 2014-09-25 | 2017-08-10 | シュゾー インダストリアル パーク トンシャン バイシクル カンパニー リミテッド | Electric bicycle central motor and its torque detection device |
| EP3199439A4 (en) * | 2014-09-25 | 2018-07-04 | Suzhou Industrial Park Tongsheng Bicycle Co., Ltd. | Middle-mounted motor of an electric bicycle and moment sensing device thereof |
| CN107054542A (en) * | 2017-01-03 | 2017-08-18 | 苏州工业园区同盛车业有限公司 | Wheel hub motor with torque sensing function and the electric bicycle using the motor |
| CN110053700A (en) * | 2018-01-19 | 2019-07-26 | 什拉姆有限责任公司 | Bicycle ergometer |
| WO2024183531A1 (en) * | 2023-03-06 | 2024-09-12 | 上海微熹动力科技有限公司 | Wireless transmission bicycle crankset spoke-type torque sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110518 Effective date of abandoning: 20120815 |