CN203172841U - Center shaft torque sensing device for electric bicycle - Google Patents
Center shaft torque sensing device for electric bicycle Download PDFInfo
- Publication number
- CN203172841U CN203172841U CN 201320175089 CN201320175089U CN203172841U CN 203172841 U CN203172841 U CN 203172841U CN 201320175089 CN201320175089 CN 201320175089 CN 201320175089 U CN201320175089 U CN 201320175089U CN 203172841 U CN203172841 U CN 203172841U
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- axis
- magnet steel
- electrical bicycle
- sensing magnet
- center shaft
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Abstract
The utility model discloses a center shaft torque sensing device for an electric bicycle. The center shaft torque sensing device comprises a center shaft assembled in a five-way tube through a bearing, cranks fixedly arranged on the center shaft, a crankset sleeved on the center shaft and an elastic torsion component for connecting the center shaft with the crankset, wherein left torque sensing magnetic steel and right torque sensing magnetic steel capable of generating circumferential relative displacement during the torsion of the elastic torsion component are fixedly arranged on the elastic torsion component; a magnetic induction coil wrapped on the left torque sensing magnetic steel and the right torque sensing magnetic steel is also sleeved outside the elastic torsion component, and is electrically connected with a motor control circuit board through a circuit board which is arranged between the center shaft and the inner wall of the five-way tube; and the motor control circuit board is electrically connected with a motor of the electric bicycle. The device is high in sensing sensitivity and accuracy; and a magneto-electric conversion mode is adopted, so that torque signals transmitted by the left and right cranks can be accurately detected under a non-contact condition.
Description
Technical field
The utility model relates to a kind of parts of Electrical Bicycle, is specifically related to a kind of Electrical Bicycle axis moment 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 handgrip, namely control the horsepower output of motor with handgrip, the power of pedaling of pin converted corresponding voltage signal output to when at present increasing Electrical Bicycle then mainly adopted torque sensor that the people is ridden, the running power of control motor can be saved the energy so greatly after the circuit for controlling motor plate amplifies processing.
The sensor that is used for Electrical Bicycle at present mostly is the Hall tachogen, this sensor uses magnet steel to stick on turning unit surfaces such as the axis of Electrical Bicycle or flywheel, and at non-rotatable members such as vehicle frame main shafts Hall element is installed, when people's tap pedal, axis or flywheel rotation produce the variation current potential corresponding to torsional moment, and export corresponding voltage signal, after amplifying processing, can control the horsepower output of motor.Yet there is following problems in this class Electrical Bicycle sensor:
1, can not detect static state and dynamic torque, survey precision is poor, can not zero start in riding, in level road and descending are ridden, can occur electric boosted excessive and make battery produce unnecessary discharge.
2, because magnet steel is not installed in axis actv. force part, it is also not obvious because of the change in displacement that torsion produces, often obvious when slow speed of revolution, then not obvious during high rotating speed, so make that the output of induced potential signal is inaccurate, the working stability of sensor and reliability all descend greatly.
The utility model content
The utility model purpose is: the high Electrical Bicycle axis of a kind of induction sensitivity and accuracy moment sensor is provided.
The technical solution of the utility model is: a kind of Electrical Bicycle axis moment sensor, comprise by bearing and be assemblied in axis in the five-way pipe, be fixed on the crank on the axis, and be sheathed on chain wheel on the axis, it also comprises an elastic torsion member that connects axis and chain wheel, left moment sensing magnet steel and the right moment sensing magnet steel that can produce circumferential relative displacement when the elastic torsion member reverses are fixedly arranged on this elastic torsion member, the outside of described elastic torsion member also is with one and wraps in described left moment sensing magnet steel and the outer magnetic induction coil of right moment sensing magnet steel, this magnetic induction coil is electrically connected with the circuit for controlling motor plate through a wiring board that is installed between axis and five-way inside pipe wall, and described circuit for controlling motor plate is electrically connected with the motor of Electrical Bicycle.
Be integrated with the velocity response Hall on the described wiring board, the velocity response magnet steel corresponding with described velocity response Hall fixedly arranged on the described axis.
Be shaped on the hole that is positioned at described right moment sensing magnet steel bottom at described axis.
Described elastic torsion member is made of the ring set that is positioned at left part and the dial that is positioned at right part, wherein, ring set is enclosed within outside the axis and its left end passes through set pin) fix with axis, dial also is enclosed within outside the axis and by a right part that axially is pressed on the described collar with jump ring, simultaneously at the position that the collar and dial compress mutually, the collar and dial be provided with cooperatively interact so that the two is at circumferential relatively-stationary latch.
Along the circumferential direction be provided with many spaced apart, the axial slits between described left moment sensing magnet steel and right moment sensing magnet steel on the ring set wall of described ring set.
Be provided with positive stop key between described dial and the axis.
Described magnetic induction coil by the coil bracket that is enclosed within the outer tubular of ring set, be wrapped in the coil on the coil bracket and wrap in coil outer left magnetic guiding loop and right magnetic guiding loop and constitute.
The utility model has the advantages that:
1. the utility model is by being installed on the stressed of elastic torsion member between axis and chain wheel, and the moment of torsion displacement that produces left and right sides moment sensing magnet steel, compare existing Hall moment sensor, the moment transmission puts in place, the faint defective of moment induced signal in the time of can not having slow speed of revolution, but can guarantee high sensitivity and the high precision of induced signal all the time.
2. only need stressed the reversing of axis to obtain torque signals by magnetic induction coil in the utility model, so can detect static state and dynamic torque, compare existing Hall moment sensor, serviceability is more reliable and more stable, but also can guarantee Electrical Bicycle zero start and keep the stable of rideability in riding.
3, in Electrical Bicycle startup and the process of riding, the people steps on foot-operated drive crank and axis rotation, axis then passes to the collar with torsion, the collar passes to dial with torsion again, in this process, because the collar is subjected to circumferential torsion, thereby make it that circumferentially distortion take place, so, just produce circumferential relative displacement between the left moment sensing magnet steel of fixing on the collar and the right moment sensing magnet steel, again owing to be shaped on the hole that is positioned at right moment sensing magnet steel bottom on the axis, when circumferential torsional deflection takes place in the collar, the relative position of right moment sensing magnet steel and hole changes, the magnetic resistance that causes field circuit changes, cause magnetic flow by magnetic induction coil to change and obtain magnetic field variation signal by this magnetic induction coil induction, and convert this signal to voltage signal by wiring board and export to the circuit for controlling motor plate through pig-tail wire, the circuit for controlling motor buttress goes out the watt level that electrical motor should be exported according to this calculated signals, thereby the ratio that reaches the power of manpower and electrical motor output keeps stable and consistent, make personnel by bike can experience the comfortable power impression that exceeds manpower, as the extension of bicycle, perform to by bike happy impression ultimate attainment.
4, the utility model adopts the mode of magnetoelectricity conversion, measure the variable quantity of elasticity original paper under the non-contacting situation accurately, the aviation value that this device can the variation of measuring workpieces in a zone simultaneously, can improve antijamming capability and the fiduciary level of product like this, the fields of measurement blank that this utility model has remedied to be needed on the go, can not obtain torque signals by contact.
5, technology of the present utility model can be applied to the torsion of measuring chain in the bicycle rear drum, can also be applied to various sports equipment parts joint needs to measure moment in motion process measuring mechanism simultaneously.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is the sectional structure scheme drawing of the utility model embodiment.
Wherein: 1-five-way pipe, 2-chain wheel, 3-chain wheel fix screw, the 4-crank, 5-crank bolt of rear end plate, 6-axis, the 7-dial, 8-ring set, the right wrister of 9-, the right deep groove ball bearing of 10-, the right magnetic guiding loop of 11-, the right moment sensing magnet steel of 12-, the 13-coil, 14-pig-tail wire, 15-left side magnetic guiding loop, the 16-coil bracket, 17-left side moment sensing magnet steel, 18-lining, the 19-wiring board, 20-left side wrister, 21-left side deep groove ball bearing, the 22-bearing lining, 23-hexagonal nut, 24-velocity response Hall, the 25-set pin, 26-velocity response magnet steel, 27-positive stop key, 28-axle jump ring, the 29-hole.
The specific embodiment
Fig. 1 has shown a specific embodiment of the utility model Electrical Bicycle axis moment sensor, it is specifically by five-way pipe 1, chain wheel 2, chain wheel fix screw 3, crank 4, crank bolt of rear end plate 5, axis 6, dial 7, ring set 8, right wrister 9, right deep groove ball bearing 10, right magnetic guiding loop 11, right moment sensing magnet steel 12, coil 13, pig-tail wire 14, left side magnetic guiding loop 15, coil bracket 16, left side moment sensing magnet steel 17, lining 18, wiring board 19, left side wrister 20, left side deep groove ball bearing 21, bearing lining 22, hexagonal nut 23, velocity response Hall 24, set pin 25, velocity response magnet steel 26, positive stop key 27, and axle is formed with jump ring 28 these parts.
The same with routine techniques, wear axis 6 in the described five-way pipe 1, all fixedly there is crank 4 at the two ends of axis 6 by crank bolt of rear end plate 5, simultaneously sheathed chain wheel 2 on the described axis 6, this chain wheel 2 is positioned at five-way pipe 1 right side, and five-way pipe 1 two ends are respectively arranged with left wrister 20 and right wrister 9.The crank 4 that relates in the present embodiment is ridden mount with routine techniques is the same with Electrical Bicycle when reality is used, and is trampled and driven rotary by the people.
Key improvements of the present utility model is that this Electrical Bicycle axis moment sensor also comprises an elastic torsion member that connects axis 6 and chain wheel 2, circumferentially left moment sensing magnet steel 17 spaced apart of a plurality of edges is fixedly arranged on this elastic torsion member, and the circumferential right moment sensing magnet steel 12 spaced apart in a plurality of edges, when the elastic torsion member reverses, can produce circumferential relative displacement (can produce circumferential distortion when the elastic torsion member is subjected to circumferential twisting resistance) between described left moment sensing magnet steel 17 and the right moment sensing magnet steel 12, and to be shaped on the hole 29(that is positioned at right moment sensing magnet steel 12 bottoms at axis 6 be blind hole).As shown in Figure 1, elastic torsion member in the present embodiment is specifically by being positioned at ring set 8 and dial 7 constitutes, its middle ring sleeve 8 is positioned at the left side of dial 7 and the two is for dividing body structure, ring set 7 is enclosed within outside the axis 6 and its left end fixes by set pin 25 and axis 6, thereby dial 7 also is enclosed within outside the axis 6 and its right part tightens the right part that dial axially is pressed on the described collar 8 by one with jump ring 28, and at the position that the collar 8 and dial 7 compress mutually, the collar 8 and dial 7 are provided with the latch that cooperatively interacts, thereby the latch on the collar 8 and the dial 7 fastens and makes the two in circumferential relative fixed, that is: the collar is provided with latch, also be provided with latch on the dial, the latch of the two is fastened togather, when one of them parts circumferentially rotated, another parts also can rotate thereupon.
The outside of described elastic torsion member also is with a magnetic induction coil that wraps in outside described left moment sensing magnet steel 17 and the right moment sensing magnet steel 12, this magnetic induction coil is electrically connected with the circuit for controlling motor plate through a wiring board 19 that is installed between axis 6 and five-way pipe 1 inwall, and described circuit for controlling motor plate is electrically connected with the motor (not shown) of Electrical Bicycle.With reference to shown in Figure 1, the magnetic induction coil in the present embodiment specifically by the coil bracket 16 that is enclosed within the outer tubular of ring set 8, be wrapped in the coil 13 on the coil bracket and wrap in coil outer left magnetic guiding loop 15 and right magnetic guiding loop 11 and constitute.
In addition, this example also is integrated with velocity response Hall 24 on described wiring board 15, at axis 6 the velocity response magnet steel 26 corresponding with described velocity response Hall body 24 is arranged fixedly.
Again in conjunction with shown in Figure 1, be provided with right deep groove ball bearing 10 between right wrister 9 in the present embodiment and the dial 7, be provided with left deep groove ball bearing 21 between left side wrister 20 and the axis 6, this left side deep groove ball bearing 21 is enclosed within on the axis 6 by bearing lining 22, again by a hexagonal nut 22 axial lockings.
Still in conjunction with shown in Figure 1, existing principle of work with present embodiment is described below:
In Electrical Bicycle startup and the process of riding, the people steps on foot-operated drive crank 4 and axis 6 rotations, 6 of axis pass to the collar 8 with torsion, the collar 8 passes to torsion dial 7 again, in this process, because the collar 8 is subjected to circumferential torsion, thereby make it that circumferentially distortion (coil and coil bracket be outage in this process) take place, so, just produce circumferential relative displacement between the left moment sensing magnet steel of fixing on the collar 8 17 and the right moment sensing magnet steel 12, again owing to be shaped on the hole 29 that is positioned at right moment sensing magnet steel 12 bottoms on the axis 6, when circumferential torsional deflection takes place in the collar 8, right moment sensing magnet steel 12 changes with the relative position of hole 29, the magnetic resistance that causes field circuit changes, cause magnetic flow by magnetic induction coil to change and obtain magnetic field variation signal by this magnetic induction coil induction, and convert this signal to voltage signal by wiring board 19 and export to the circuit for controlling motor plate through pig-tail wire 14.Described circuit for controlling motor buttress is exported corresponding control signal respectively according to the power of voltage signal, and drive motor reduces or improve running power to play good power-assisted effect, saves the energy greatly.Certainly, velocity response Hall 24 and velocity response magnet steel 26 have also been introduced in the present embodiment, their principle of work is the same with routine techniques, velocity response magnet steel 26 changes the magnetic field of its generation with axis 6 rotations, utilize velocity response Hall 24 to obtain the magnetic field variation signal of velocity response magnet steel 26, convert the magnetic field variation signal that 24 inductions of velocity response Hall obtain to speed signal by wiring board 19 again, export to the circuit for controlling motor plate again, handle back control motor rotation power by it.
In addition, this example circumferentially is out of shape in order to make the easier generation of the collar 8 under twisting force, also along the circumferential direction is being provided with many axial slits spaced apart, between described left moment sensing magnet steel 17 and right moment sensing magnet steel 12 on the ring set wall of the collar 8.Simultaneously excessive and cause structural failure for fear of the collar 8 deflections again, this example is provided with the positive stop key 27 that can rotate by a small margin with dial 7 again between described dial 7 and axis 6, be achieved in that specifically limiting stopper 27 is stuck in the keyway of offering on dial 7 and the axis 6, wherein, the keyway size of offering on the axis 6 is slightly larger than the size of positive stop key 27, when the collar 8 produces by a small margin circumferential distortion, positive stop key 27 is followed dial 7 and is produced circumferentially moving by a small margin with respect to axis 6, and when the circumferential amount of movement of positive stop key 27 props up the cell wall of keyway on the axis 6 greatly, just can not continue to move, can not be excessive with this deflection that limits the collar 8.
Certainly, above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow people can understand content of the present utility model and implements according to this, can not limit protection domain of the present utility model with this.All equivalent transformation or modifications of doing according to the spiritual essence of the utility model main technical schemes all should be encompassed within the protection domain of the present utility model.
Claims (7)
1. Electrical Bicycle axis moment sensor, comprise by bearing and be assemblied in the interior axis (6) of five-way pipe (1), be fixed on the crank (4) on the axis (6), and be sheathed on chain wheel (2) on the axis (6), it is characterized in that: also comprise an elastic torsion member that connects axis (6) and chain wheel (2), left moment sensing magnet steel (17) and the right moment sensing magnet steel (12) that can produce circumferential relative displacement when the elastic torsion member reverses are fixedly arranged on this elastic torsion member, the outside of described elastic torsion member also is with one and wraps in described left moment sensing magnet steel (17) and the outer magnetic induction coil of right moment sensing magnet steel (12), this magnetic induction coil is electrically connected with the circuit for controlling motor plate through a wiring board (19) that is installed between axis (6) and five-way pipe (1) inwall, and described circuit for controlling motor plate is electrically connected with the motor of Electrical Bicycle.
2. Electrical Bicycle axis moment sensor according to claim 1, it is characterized in that: be integrated with velocity response Hall (24) on the described wiring board (15), described axis (6) is gone up fixedly the velocity response magnet steel (26) corresponding with described velocity response Hall (24).
3. Electrical Bicycle axis moment sensor according to claim 1 is characterized in that: be shaped on the hole (29) that is positioned at described right moment sensing magnet steel (12) bottom at described axis (6).
4. Electrical Bicycle axis moment sensor according to claim 1 and 2, it is characterized in that: described elastic torsion member is made of ring set (8) and the dial (7) of minute body structure, wherein, ring set (8) is enclosed within outside the axis (6) and its left end fixes by set pin (25) and axis (6), dial (7) also is enclosed within outside the axis (6) and it is by a right part that axially is pressed on described ring set (8) with jump ring (28), simultaneously at the position that ring set (8) and dial (7) compress mutually, ring set (8) and dial (7) are provided with and cooperatively interact, to prevent that the two is relative to the latch that circumferentially rotates.
5. Electrical Bicycle axis moment sensor according to claim 4 is characterized in that: along the circumferential direction be provided with on the ring set wall of described ring set (8) many spaced apart, be positioned at the axial slit between described left moment sensing magnet steel (17) and the right moment sensing magnet steel (12).
6. Electrical Bicycle axis moment sensor according to claim 4 is characterized in that: be provided with positive stop key (27) between described dial (7) and the axis (6).
7. Electrical Bicycle axis moment sensor according to claim 4 is characterized in that: described magnetic induction coil (13) by the coil bracket (16) that is enclosed within the outer tubular of ring set (8), be wrapped in the coil (13) on the coil bracket and wrap in the outer left magnetic guiding loop (15) of coil and right magnetic guiding loop (11) formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320175089 CN203172841U (en) | 2013-04-09 | 2013-04-09 | Center shaft torque sensing device for electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320175089 CN203172841U (en) | 2013-04-09 | 2013-04-09 | Center shaft torque sensing device for electric bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203172841U true CN203172841U (en) | 2013-09-04 |
Family
ID=49069583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320175089 Withdrawn - After Issue CN203172841U (en) | 2013-04-09 | 2013-04-09 | Center shaft torque sensing device for electric bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203172841U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103171733A (en) * | 2013-04-09 | 2013-06-26 | 苏州八方电机科技有限公司 | Central-shaft torque sensing device for electric bicycle |
| WO2018040337A1 (en) * | 2016-08-31 | 2018-03-08 | 太仓市悦博电动科技有限公司 | Bilateral power meter used in bicycle or auxiliary power bicycle |
-
2013
- 2013-04-09 CN CN 201320175089 patent/CN203172841U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103171733A (en) * | 2013-04-09 | 2013-06-26 | 苏州八方电机科技有限公司 | Central-shaft torque sensing device for electric bicycle |
| CN103171733B (en) * | 2013-04-09 | 2015-09-30 | 苏州八方电机科技有限公司 | A kind of electrical bicycle middle shaft moment sensor |
| WO2018040337A1 (en) * | 2016-08-31 | 2018-03-08 | 太仓市悦博电动科技有限公司 | Bilateral power meter used in bicycle or auxiliary power bicycle |
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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: 20130904 Effective date of abandoning: 20150930 |
|
| RGAV | Abandon patent right to avoid regrant |