CN102221432B - Toque sensor - Google Patents
Toque sensor Download PDFInfo
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- CN102221432B CN102221432B CN2011100877240A CN201110087724A CN102221432B CN 102221432 B CN102221432 B CN 102221432B CN 2011100877240 A CN2011100877240 A CN 2011100877240A CN 201110087724 A CN201110087724 A CN 201110087724A CN 102221432 B CN102221432 B CN 102221432B
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Abstract
The invention discloses a toque sensor, which comprises a crank, an active part, a passive part and an inner cover. The passive part is elastically connected with the active part, and the passive part and the active part can be rotated relatively. The active part and the passive part are respectively provided with an active magnetic assembly and a passive magnetic assembly, and the active part and the passive part respectively have a plurality of active magnetic poles and passive magnetic poles, wherein the active magnetic poles and the passive magnetic poles are in an annual interval arrangement or arranged continuously. A PCB plate of the inner cover is equipped with more than two pairs of Hall elements, wherein each pair of Hall elements have a passive Hall element corresponding to the passive magnetic poles and an active Hall element corresponding to the active magnetic poles. A geometric centre of a sensitive region of each active Hall element is located at a vertical projection position of one active magnetic pole and all geometric centers are at different positions of the active magnetic pole; and a geometric centre of a sensitive region of each passive Hall element is located at a vertical projection position of one passive magnetic pole and all geometric centers are at different positions of the passive magnetic pole. Therefore, a plurality of groups of signals can be collected simultaneously; moreover, signals of each group can ensured to be not repeated.
Description
Technical field
the present invention relates to a kind of electric bicycle, particularly the torque sensor of the electric bicycle of assisted pedal stroke enforcement.
Background technology
The electric bicycle that
assisted pedal stroke is exercised needs in real time to convert the power that its passerby imposes on the pedal to electric signal that the controller of bicycle can be discerned through a torque sensor, with the output power of control motor when riding.
existing torque sensor all is installed on the axis of electric bicycle; It mainly comprises: crank, the driving part that is connected mutually with crank; And the passive components that laterally arranges with driving part; Said passive components is connected with driving part elasticity and can relatively rotates, and is respectively equipped with several active magnetic assemblies and several passive magnetic assemblies on driving part and the passive components, and said torque sensor also comprises two Hall elements with two groups of magnetic assemblies (active magnetic assembly and passive magnetic assembly) induction; With acquired signal, two Hall elements are arranged on the pcb board.But the signal intensity of gathering through the long-term Hall element that experiment showed, above-mentioned torque sensor a little less than.
Summary of the invention
the present invention seeks to: a kind of torque sensor is provided; It is at the Hall element that is provided with on the pcb board more than two pairs; And the geometric center of each active Hall element sensitive volume is in the diverse location of the active magnetic utmost point in the vertical projection position of active magnetic pole; The geometric center of each passive Hall element sensitive volume is in the diverse location of passive magnetic pole in the vertical projection position of passive magnetic pole; So not only can gather many group signals simultaneously, and guarantee respectively to organize the signal that signal is not repetition.
technical scheme of the present invention is: a kind of torque sensor; The driving part that comprises crank, is connected mutually with crank; The passive components that laterally arranges with driving part and with driving part axial restraint and can counterrotating inner cover; Said passive components is connected with driving part elasticity and can relatively rotates; Be respectively equipped with active magnetic assembly and passive magnetic assembly on said driving part and the passive components; The passive magnetic pole that the active magnetic pole that said active magnetic assembly has a plurality of separation in the form of a ring or arranges continuously, passive magnetic assembly have a plurality of separation in the form of a ring or arrange continuously is installed with pcb board on the said inner cover; Pcb board is provided with the Hall element more than two pairs; The every pair of Hall element has a passive Hall element of answering with passive pole pair and one and the corresponding active Hall element of magnetic pole initiatively, and the geometric center of each active Hall element sensitive volume is in the diverse location of the active magnetic utmost point in the vertical projection position of active magnetic pole, and the geometric center of each passive Hall element sensitive volume is in the diverse location of passive magnetic pole in the vertical projection position of passive magnetic pole.
above-mentioned active magnetic assembly can be a plurality of active magnet steel, and passive magnetic assembly can be a plurality of passive magnet steel, and a plurality of active magnet steel and a plurality of passive magnet steel difference be separation in the form of a ring; Above-mentioned active magnetic assembly and passive magnetic assembly also can be magnet ring.The preferred back of the present invention scheme; Specify for: said active magnetic assembly is an internal magnetic ring, and passive magnetic assembly is an outer magnetic ring, and said outer magnetic ring is concentric with internal magnetic ring, the isoplanar is provided with; Be respectively equipped with identical many of quantity on said internal magnetic ring and the outer magnetic ring to the S-N pole pair; Wherein each S or N magnetic pole right central angle all identical, above-mentioned active magnetic very is arranged on S magnetic pole and the N magnetic pole on the internal magnetic ring, above-mentioned passive magnetic pole is S magnetic pole and the N magnetic pole that is arranged on the outer magnetic ring.The present invention replaces original a plurality of magnet steel with magnet ring, has promoted sample rate and quantity of information greatly, and precision also promotes significantly simultaneously, makes that the startup of car load is faster, following property is better, and the power-off time during parking significantly shortens.
The back side of
said pcb board is provided with magnetic conduction sheet; The magnetic conduction portion that magnetic conduction sheet has and each Hall element is corresponding respectively, the geometric center of each magnetic conduction portion overlaps in the vertical projection direction of the magnetic conduction face geometric center with the sensitive volume of corresponding Hall element.Above-mentioned magnetic conduction sheet setting has improved the signal intensity of Hall acquired signal greatly.
said driving part is a connector, and it cooperates with the splined section of crank through splined hole; Said passive components is a fluted disc.Concrete syndeton between above-mentioned driving part and the passive components is: establish on the said passive components and circumferentially be evenly equipped with a plurality of spring mounting holes; Driving part is provided with spring mounting hole quantity and equates and the corresponding installation projection in position, install projection stretch into spring mounting hole an end and and the other end of spring mounting hole between be provided with spring.Circumferentially be evenly equipped with a plurality of dogs on the said driving part, said passive components has a plurality of perforates corresponding with dog, and dog is located in the corresponding aperture and can be slidingly matched relatively.
The concrete annexation of
said inner cover and driving part is: the middle hole wall place of said inner cover extends internally and is formed with clamping ring; The periphery wall of clamping ring is provided with the ring-type convex tendon; Said driving part is provided with the annular mounting groove corresponding with convex tendon, and said convex tendon is embedded in this mounting groove and both can relatively rotate.Assembling for ease, the present invention is evenly equipped with many axially extended open slots at said clamping ring and ring-type convex tendon at circumferencial direction, makes clamping ring have elasticity preferably, to make things convenient for the assembling between clamping ring and the driving part.The present invention is triangular in shape with the Cross section Design of said convex tendon, and convex tendon two lateral incline have just possessed guide function when mounted like this, makes things convenient for convex tendon to embed mounting groove smoothly.
The outside of
said inner cover is provided with a Hall cover, and this Hall cover is to peg graft in the jack be fixed on inner cover, above-mentioned pcb board and on Hall element and magnetic conduction sheet all be arranged in this Hall cover.
Advantage of the present invention is:
Hall element more than two pairs has been adopted in
1. the present invention; And the geometric center of each active Hall element sensitive volume is in the diverse location of the active magnetic utmost point in the vertical projection position of active magnetic pole; The geometric center of each passive Hall element sensitive volume is in the diverse location of passive magnetic pole in the vertical projection position of passive magnetic pole; So not only can gather many group signals simultaneously, and guarantee respectively to organize the signal that signal is not repetition.
. active magnetic assembly and passive magnetic assembly all adopt magnet ring among the present invention; Through increasing the magnetic pole number of poles; Sample rate and quantity of information have been promoted greatly; Simultaneously precision also promotes significantly, make car load startup sooner, more casual better, the breakpoint time during parking significantly shortens.
. the present invention is provided with magnetic conduction sheet and magnetic conduction sheet at the pcb board back side each magnetic conduction portion geometric center overlaps in the vertical projection direction of the magnetic conduction face geometric center with the sensitive volume of corresponding Hall element, has improved the signal intensity of Hall acquired signal greatly.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Fig. 1 is a wiring layout of the present invention;
Fig. 2 is another wiring layout of the present invention;
Fig. 3 is a cut-open view of the present invention;
Fig. 4 is the synoptic diagram of pcb board one side among the present invention;
Fig. 5 is the synoptic diagram of pcb board opposite side among the present invention;
Fig. 6 is the relative position synoptic diagram of master, passive magnetic assembly and Hall element among the present invention;
Fig. 7 is the annexation synoptic diagram between master, the passive components among the present invention;
Fig. 8 is another annexation synoptic diagram between master, the passive components among the present invention;
wherein: 1 crank; 2 driving parts; 21 install projection; 22 dogs; 23 splined holes; 3 passive components; 31 spring mounting holes; 32 perforates; 4 active magnetic assemblies; 5 passive magnetic assemblies; The 6PCB plate; 7 Hall elements; 71 passive Hall elements; 72 active Hall elements; 8 magnetic conduction sheets; 81 magnetic conduction portions; 9 springs; 10 inner covers; 11 outer covers; 12 Hall covers; 13 clamping rings; 14 convex tendons; 15 mounting grooves; 16 open slots.
Embodiment
embodiment: like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 6; A kind of torque sensor; The driving part 2 that comprises crank 1, is connected mutually with crank 1; The passive components 3 that laterally arranges with driving part 2, with the driving part axial restraint and can be counterrotating inner cover 10, be located at the outer cover 11 on the driving part 2, and the Hall cover 13 that is arranged on inner cover 10 outsides, said passive components 3 is connected with driving part 2 elasticity and can relatively rotates; Be respectively equipped with active magnetic assembly 4 and passive magnetic assembly 5 on said driving part 2 and the passive components 3; The assembly of active magnetic described in the present embodiment 4 is an internal magnetic ring, and passive magnetic assembly 5 is an outer magnetic ring, and said outer magnetic ring is concentric with internal magnetic ring, the isoplanar is provided with; Be respectively equipped with identical many of quantity on said internal magnetic ring and the outer magnetic ring to the S-N pole pair, wherein each S or N magnetic pole right central angle all identical.Be installed with pcb board 6 on the said inner cover 10; Pcb board 6 is provided with the Hall element 7 more than two pairs; The every pair of Hall element 7 has a passive Hall element 71 corresponding with passive magnetic pole (S magnetic pole on the outer magnetic ring or N magnetic pole) and one and the corresponding active Hall element 72 of magnetic pole (S magnetic pole on the internal magnetic ring or N magnetic pole) initiatively; The geometric center of each active Hall element 72 sensitive volume is in the diverse location of the active magnetic utmost point in the vertical projection position of active magnetic pole; The geometric center of each passive Hall element 71 sensitive volume is in the diverse location of passive magnetic pole in the vertical projection position of passive magnetic pole; So not only can gather many group signals simultaneously, and guarantee respectively to organize the signal that signal is not repetition.
above-mentioned internal magnetic ring and outer magnetic ring can be rubidium iron boron magnet ring, and the number of magnetic poles of internal magnetic ring and outer magnetic ring is 60 (N, S each 30 utmost points), and be as shown in Figure 6.The present invention replaces original a plurality of magnet steel with magnet ring, has promoted sample rate and quantity of information greatly, and simultaneously precision also promotes significantly, make car load startup sooner, more casual better, the breakpoint time during parking significantly shortens.
are further; In order to reduce production costs as far as possible, preferred Hall element 7 quantity of present embodiment are two pairs, and the many groups signal that collects for ease carries out subsequent treatment; The arrangement of two pairs of Hall elements 7 can for: one initiatively Hall 72 be arranged on the center of magnetic pole initiatively accordingly; Another active Hall 72 is arranged on the edge (seam crossings of two adjacent active magnetic poles) of an active magnetic pole accordingly, and in like manner, a passive Hall 71 is arranged on the center of a passive magnetic pole accordingly; Another passive Hall 71 is arranged on the edge (seam crossings of two adjacent passive magnetic poles) of a passive magnetic pole accordingly, and is as shown in Figure 6.
are like Fig. 1, Fig. 2, Fig. 4 and shown in Figure 5; The back side of said pcb board 6 is provided with magnetic conduction sheet 8; The magnetic conduction portion 81 that magnetic conduction sheet 8 has and each Hall element 7 is corresponding respectively, the geometric center a of each magnetic conduction portion 81 overlaps at the vertical projection direction of the magnetic conduction face geometric center b with the sensitive volume of corresponding Hall element 7.Above-mentioned magnetic conduction sheet 8 is provided with, and has improved the signal intensity of Hall acquired signal greatly.
are as shown in Figure 1, and said Hall cover 12 is to peg graft in the jack be fixed on inner cover 10, above-mentioned pcb board 6 and on Hall element 7 all be arranged in this Hall cover 12 with magnetic conduction sheet 8.
like Fig. 1, Fig. 7 and shown in Figure 8, said driving part 2 is a connector, and it cooperates with the splined section of crank 1 through splined hole 23; Said passive components 3 is a fluted disc.Concrete syndeton between above-mentioned driving part 2 and the passive components 3 is: establish on the said passive components 3 and circumferentially be evenly equipped with a plurality of spring mounting holes 31; Driving part 2 is provided with spring mounting hole 31 quantity and equates and the corresponding installation projection 21 in position, install projection 21 stretch into spring mounting hole 31 an end and and the other end of spring mounting hole 31 between be provided with spring 9.Circumferentially be evenly equipped with a plurality of dogs 22 on the said driving part 2, said passive components 3 has the corresponding perforate 32 of a plurality of and dog 22, and dog 22 is located in the corresponding aperture 32 and can be slidingly matched relatively.
as shown in Figures 2 and 3; Said inner cover 10 with the concrete annexation of driving part 2 is: the middle hole wall place of said inner cover 10 extends internally and is formed with clamping ring 13; The periphery wall of clamping ring 13 is provided with ring-type convex tendon 14; Said driving part 2 is provided with the annular mounting groove 15 corresponding with convex tendon 14, and said convex tendon 14 is embedded in this mounting groove 15 and both can relatively rotate.Assembling for ease, in the present embodiment, said clamping ring 13 and ring-type convex tendon 14 are evenly equipped with many axially extended open slots 16 at circumferencial direction, make clamping ring 13 have elasticity preferably, to make things convenient for the assembling between clamping ring 13 and the driving part 2.Present embodiment is also triangular in shape with the Cross section Design of said convex tendon 14, and 14 liang of lateral incline of convex tendon have just possessed guide function when mounted like this, so that convex tendon 14 embeds mounting groove 15 smoothly.
More than
only is concrete exemplary applications of the present invention, and protection scope of the present invention is not constituted any limitation.Except that the foregoing description, the present invention can also have other embodiment.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the present invention's scope required for protection.
Claims (9)
1. torque sensor; The driving part (2) that comprises crank (1), is connected mutually with crank (1); The passive components (3) that laterally arranges with driving part (2) and with driving part (2) axial restraint and can counterrotating inner cover (10); Said passive components (3) is connected with driving part (2) elasticity and can relatively rotates; Be respectively equipped with active magnetic assembly (4) and passive magnetic assembly (5) on said driving part (2) and the passive components (3); It is characterized in that: the active magnetic pole that said active magnetic assembly (4) has a plurality of separation in the form of a ring or arranges continuously; The passive magnetic pole that passive magnetic assembly (5) has a plurality of separation in the form of a ring or arranges continuously; Be installed with pcb board (6) on the said inner cover (10); Pcb board (6) is provided with the Hall element (7) more than two pairs, and every pair of Hall element (7) has a passive Hall element (71) of answering with passive pole pair and one and the corresponding active Hall element (72) of magnetic pole initiatively, and the geometric center of each active Hall element (72) sensitive volume is in the diverse location of the active magnetic utmost point in the vertical projection position of active magnetic pole; The geometric center of each passive Hall element (71) sensitive volume is in the diverse location of passive magnetic pole in the vertical projection position of passive magnetic pole; The back side of said pcb board (6) is provided with magnetic conduction sheet (8), the magnetic conduction portion (81) that magnetic conduction sheet (8) has and each Hall element (7) is respectively corresponding, and the geometric center of each magnetic conduction portion (81) overlaps in the vertical projection direction of the magnetic conduction face geometric center with the sensitive volume of corresponding Hall element (7).
2. torque sensor according to claim 1; It is characterized in that: said active magnetic assembly (4) is an internal magnetic ring; Passive magnetic assembly (5) is an outer magnetic ring; Said outer magnetic ring is concentric with internal magnetic ring, the isoplanar is provided with, and is respectively equipped with identical many to the S-N pole pair of quantity on said internal magnetic ring and the outer magnetic ring, wherein each S or N magnetic pole right central angle all identical; Above-mentioned active magnetic very is arranged on S magnetic pole and the N magnetic pole on the internal magnetic ring, and above-mentioned passive magnetic pole is S magnetic pole and the N magnetic pole that is arranged on the outer magnetic ring.
3. torque sensor according to claim 1 and 2; It is characterized in that: establish on the said passive components (3) and circumferentially be evenly equipped with a plurality of spring mounting holes (31); Driving part (2) is provided with spring mounting hole (31) quantity and equates and the corresponding installation projection (21) in position, install projection (21) stretch into spring mounting hole (31) an end and and the other end of spring mounting hole (31) between be provided with spring (9).
4. torque sensor according to claim 1 and 2; It is characterized in that: circumferentially be evenly equipped with a plurality of dogs (22) on the said driving part (2); Said passive components (3) has a plurality of perforates (32) corresponding with dog (22), and dog (22) is located in the corresponding aperture (32) and can be slidingly matched relatively.
5. torque sensor according to claim 1; It is characterized in that: the middle hole wall place of said inner cover (10) extends internally and is formed with clamping ring (13); The periphery wall of clamping ring (13) is provided with ring-type convex tendon (14); Said driving part (2) is provided with the annular mounting groove (15) corresponding with convex tendon (14), and said convex tendon (14) is embedded in this mounting groove (15) and both can relatively rotate.
6. torque sensor according to claim 5 is characterized in that: said clamping ring (13) and ring-type convex tendon (14) are evenly equipped with many axially extended open slots (16) at circumferencial direction.
7. according to claim 5 or 6 described torque sensors, it is characterized in that: the cross section of said convex tendon (14) is triangular in shape.
8. torque sensor according to claim 1; It is characterized in that: the outside of said inner cover (10) is provided with a Hall cover (12); This Hall cover (12) is to peg graft in the jack be fixed on inner cover (10), above-mentioned pcb board (6) and on Hall element (7) and magnetic conduction sheet (8) all be arranged in this Hall cover (12).
9. torque sensor according to claim 1 and 2 is characterized in that: said driving part (2) is a connector, and it cooperates with the splined section of crank (1) through splined hole (23), and said passive components (3) is a fluted disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100877240A CN102221432B (en) | 2010-10-27 | 2011-04-08 | Toque sensor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020577952.7 | 2010-10-27 | ||
| CN201020577952 | 2010-10-27 | ||
| CN2011100877240A CN102221432B (en) | 2010-10-27 | 2011-04-08 | Toque sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102221432A CN102221432A (en) | 2011-10-19 |
| CN102221432B true CN102221432B (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100877240A Active CN102221432B (en) | 2010-10-27 | 2011-04-08 | Toque sensor |
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| Country | Link |
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| CN (1) | CN102221432B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494826B (en) * | 2011-12-29 | 2013-05-22 | 无锡尚格工业设计有限公司 | Fluted disc type double-work-position sensor |
| CN202382897U (en) * | 2011-12-29 | 2012-08-15 | 无锡尚格工业设计有限公司 | Double-station Hall sensor |
| JP2013230719A (en) * | 2012-04-27 | 2013-11-14 | Asahi Co Ltd | Crank structure of power-assisted bicycle |
| CN108444633A (en) * | 2017-02-17 | 2018-08-24 | 重庆三叶花科技有限公司 | A kind of torque sensor of electric bicycle |
| CN112393830A (en) * | 2019-08-15 | 2021-02-23 | 扬顶（天津）科技有限公司 | Improved spring type chain disc torque sensor |
| CN110843993A (en) * | 2019-11-19 | 2020-02-28 | 浙江科恩特电机科技有限公司 | Double-position torsion following transmission mechanism |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120006A (en) * | 1994-07-20 | 1996-04-10 | 大西义弘 | A bicycle provided with a DC motor, a direct drive three phase DC motor and its driving device |
| CN2675543Y (en) * | 2004-01-29 | 2005-02-02 | 黄岩 | Sensing device for intelligent electric bicycle |
| DE102004022789A1 (en) * | 2004-05-08 | 2005-12-01 | Sram Deutschland Gmbh | Bicycle performance assisting arrangement, has electronic controller to control voltage supply to electric motor based on rotation of magnet ring that rotates with planetary gear, where ring rotation is sensed by Hall-effect sensors |
| EP2028097A1 (en) * | 2006-05-31 | 2009-02-25 | Sunstar Giken Kabushiki Kaisha | Torque detector and electrically assisted bicycle |
-
2011
- 2011-04-08 CN CN2011100877240A patent/CN102221432B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120006A (en) * | 1994-07-20 | 1996-04-10 | 大西义弘 | A bicycle provided with a DC motor, a direct drive three phase DC motor and its driving device |
| CN2675543Y (en) * | 2004-01-29 | 2005-02-02 | 黄岩 | Sensing device for intelligent electric bicycle |
| DE102004022789A1 (en) * | 2004-05-08 | 2005-12-01 | Sram Deutschland Gmbh | Bicycle performance assisting arrangement, has electronic controller to control voltage supply to electric motor based on rotation of magnet ring that rotates with planetary gear, where ring rotation is sensed by Hall-effect sensors |
| EP2028097A1 (en) * | 2006-05-31 | 2009-02-25 | Sunstar Giken Kabushiki Kaisha | Torque detector and electrically assisted bicycle |
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| CN102221432A (en) | 2011-10-19 |
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