CN2382648Y - Pedal force sensing mechanism for electric bicycle - Google Patents
Pedal force sensing mechanism for electric bicycle Download PDFInfo
- Publication number
- CN2382648Y CN2382648Y CN99215632U CN99215632U CN2382648Y CN 2382648 Y CN2382648 Y CN 2382648Y CN 99215632 U CN99215632 U CN 99215632U CN 99215632 U CN99215632 U CN 99215632U CN 2382648 Y CN2382648 Y CN 2382648Y
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- CN
- China
- Prior art keywords
- bevel gear
- axle
- legpower
- reaction
- torque sensing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a pedal force sensing mechanism for electric bicycles, which is characterized in that an axle shaft of a crank is connected and provided with a differential gear transmission mechanism. When the axle shaft is driven by the pedal force of human power, the differential gear transmission mechanism produces a counterforce and a flexible torque force sensing strip is actuated by the counterforce. When tiny deformation is sensed by a strain gauge attached to the torque force sensing strip, a resistance value is changed; an amplifying circuit which is connected with a through circuit receives the change of the resistance value to form an amplified voltage signal, so the amplified voltage signal is conveyed to a controller to accurately control the assistant force of a motor.
Description
The utility model relates to a kind of Electrical Bicycle, refers to the Electrical Bicycle sensing legpower mechanism of a kind of Electrical Bicycle sensing torsion or legpower especially.
Bicycle makes bicycle industry not weigh down all the time owing to have both motion, characteristic light, free from environmental pollution, opens up the bicycle special lane especially with advanced country especially, the enjoyment of enjoyment bike riding.The development of the product kenel of bicycle is more multiple, has begun Electrical Bicycle in vogue at present, with the auxiliary foot-operated legpower of the Electronmotive Force of electrical motor, provides the more comfortable light effect that drives.The Electrical Bicycle of at present existing sensing torsion, speed as " with the bicycle of electrical motor ", wherein is provided with legpower testing agency and the speed of a motor vehicle testing agency of detecting legpower, and the controller of control motor power.Reach controller when detecting signal, just can see through the size that controller changes motor power.Furtherly, the transmission device of this bicycle is by pedal input rotation, through crank, free-wheel clutch and transmission planetary gear type booster engine, legpower testing agency is the antagonistic force that relies on the sun gear that forces in sun and planet gear, learn the strength that manpower is trampled by the rotation amount of test rod, and speed of a motor vehicle testing agency sees through the rotating speed that detects speed reduction gearing, two testing results is transferred to controller again, thus the output at control motor.But this bicycle has its shortcoming to exist; First, the transmission device of planetary gear type, complex structure, requirement working accuracy height causes each gear that the relation of leading a global launch is arranged mutually, and number of teeth configuration all needs to calculate appropriate to each other, especially desire is set the revolution ratio of certain value, then the number of teeth of all gears all needs totally to revise drawing optimal needs, so manufacturing cost is higher, and easily price is married again to the customer.Second, the element of legpower testing agency is many and complicated, its swing offset quality entity that sees through testing agency is after touching potential device, beginning is learnt the result of legpower by the potential device detecting, therefore the sensing of repetitiousness contact design, more easily cause the problem of component wear, material consumption, the life-span of testing agency, potential device is shorter.
Main purpose of the present utility model provides a kind of differential tramsmitting linkage effect by Electrical Bicycle makes the torque sensing sheet be out of shape the sensing legpower mechanism of the Electrical Bicycle that comes the sensing legpower.
The technical solution of the utility model is to provide a kind of sensing legpower mechanism of Electrical Bicycle, the battery box of supply motor electric power and relevant cooperations such as controller are installed in vehicle frame, one body interior forms room to settle electrical motor, the axle winding speed reduction gearing of electrical motor, and laterally run through one day axle is set at body, they axle two ends are to connect to establish crank, pedal, vehicle frame is provided with controller for torsion, the signal input that speed detects, make controller may command motor-output according to this, room at place's sidewall fitted bearing of the relative adjacent side of motor spindle to assemble a driving bevel gear, the one end is the umbrella tooth, the axle head of the other end is sheathed for a unilateral bearing, make driving bevel gear preparation and bevel ratchet wheel orthogonal engagement, this bevel ratchet wheel one end is to be fixed in this external large fluted disc; Wherein, at sky axle one end the differential type gear drive is set, it comprises drive link, reaction bevel gear, transmission bevel gear, Drive ratchet seat; The at one end coaxial sheathed reaction bevel gear of it axle, the reaction bevel gear is the plane at the face in addition of umbrella tooth, the outside one end vertically is equipped with projection, other establishes a long block retaining briquetting, its end face locking is at body, one side vertical surface screw lock is located torque sensing sheet one end of a flexible material, torque sensing sheet other end free end is leaned against on the projection side, and retaining briquetting adjacent torque sensing sheet side is cut and is established a part of thickness, to keep a mobile space with the torque sensing sheet, the torque sensing sheet pastes solid one in a side of mobile space direction relatively can measure the strain sensor of strain, strain sensor connects a resistance signal lead, termination is on the circuit that is fixed on retaining briquetting side in addition to make it, and this circuit comprises the voltage source of power supply at least, amplifying circuit;
The adjacent reaction bevel gear of it axle overlaps a drive link admittedly, and drive link two ends extended spot respectively is arranged with the transmission bevel gear, the transmission bevel gear can with reaction bevel gear flank engagement.
The sensing legpower mechanism of Electrical Bicycle as previously discussed, wherein, one end of the relative reaction bevel gear of it axle runs through body, the other end passes through body openings, cooperate enclosing cover to be covered with sealing at this end opening, and spacer one bearing is located with clasp between day axle one end and the body, and right overhead is being coupling in addition a sheathed clasp and is locating.
The sensing legpower mechanism of Electrical Bicycle as previously discussed, wherein, the cooresponding inner ring surface of drive link is the flank of tooth, a day axle relative position is a gear hobbing face, is one with the drive link engagement.
The sensing legpower mechanism of Electrical Bicycle as previously discussed, wherein, body is equipped with one against stepping on backing block towards torque sensing sheet direction end face, and its subsides are butted on the projection side.
The utlity model has following advantage:
1. the utility model utilization differential type Gear Transmission Design is simpler and easy in design and manufacturing as the mechanism of torsion and speed sensitive, and does not need existing planetary gear system complexity and high manufacturing accuracy requirement, and the utility model is cost-cutting relatively effectively.
2. the characteristic of being worth mentioning most, legpower sensing of the present utility model are to cooperate differential tramsmitting linkage by strain sensor.Wherein utilize in the zone of elastic limit of flexible torque sensing sheet, stress and strain is proportional, therefore measuring strain just can directly reflect stress simply, this is measured legpower and quite accurate with the torque sensing sheet in conjunction with strain sensor, promptly utilize the variation of the strain sensor value of having a resistance that attaches to transfer to interlock circuit, controller through the resistance signal electric wire, and provide accurate sensing effect, and make the auxiliaring effect of electronic legpower more accurate, reach the electric power auxiliaring effect that is more suitable for, not only drive comfortable, power saving, also save unnecessary maintenance cost.General eddy current type inductor is the error of accurate measuring trace quantity distortion not too easily, and design of the present utility model is significantly to promote effect.
Mainly be transmission device with differential type, when manpower is trampled and is made the antagonistic force of differential tramsmitting linkage put on the flexible torque sensing sheet of tool, and.
Further specify concrete feature of the present utility model and purpose below in conjunction with accompanying drawing.
Fig. 1 is that integral body of the present utility model is analysed and observe assembly drawing.
Fig. 2 is the compound section figure of bevel ratchet wheel of the present utility model and Drive ratchet seat.
Fig. 3 is the partial perspective view of torque sensing sheet of the present utility model and differential tramsmitting linkage.
Fig. 4 is torque sensing sheet of the present utility model and strain sensor configuration end plan view.
Fig. 5 is speed sensor of the present utility model and velocity response sheet configuration section end elevation.
The utility model is a kind of sensing legpower mechanism of Electrical Bicycle, and its general structure is to be provided with the guard shield protection at following pipe with Chain stay delivery position periphery, and the battery box of supply motor electric power and relevant elements such as controller then cooperate and be fixedly arranged on vehicle frame.Please earlier referring to Fig. 1, body 22 1 end interlocking electrical motors 40, body 22 open ends are combined with enclosing cover 14, with the back encapsulation that finishes in assembling.In the inner rooms 43 that form relatively of body 22, make it that speed reduction gearing and transmission device, sensing device are set.Configuration such as Fig. 1 partly slows down, axle by electrical motor 40 picks out a little helical wheel (diagram is not seen), and after meshing another helical wheel 44, room 43 is at place's sidewall of the adjacent side of relative electrical motor 40 axles, be fitted bearing 46 to assemble a driving bevel gear 41, it is that an end is the umbrella profile of tooth, the axle head of the other end is sheathed for a unilateral bearing 20, cooperate again by helical wheel 44 coaxial unilateral bearing 20 outer circumferential sides that are set in, make driving bevel gear 41 preparations and the engagement of a bevel ratchet wheel 17 orthogonals; As Fig. 1,2, reach bevel ratchet wheel 17 via deceleration position power, this bevel ratchet wheel 17 is in conjunction with being fixed at large fluted disc 13, and bevel ratchet wheel 17 internal faces see through bearing 12 and link a day axle 34 simultaneously, makes day axle 34 combination gear modified roll mechanisms and relevant sense mechanism.Wherein, they axle 34 1 ends run through body 22, and the other end cooperates enclosing cover 14 to be covered with sealing by body 22 openings at this end opening, and spacer one bearing 29 can rotate day axle 34 with the clasp location between day axle 34 1 ends and the body 22 in the body 22 of fixing shape;
As Fig. 3,4, the solid reaction bevel gear 27 of it axle 34 coaxial close bearings 29 positions cover, reaction bevel gear 27 one sides are made as gear hobbing face 273 with engaged transmission bevel gear 26, reaction bevel gear 27 another sides are the plane, vertically be equipped with projection 271 in this outer end, plane, to fix a torque sensing sheet 30 that is locked on retaining briquetting 31 in a side of the projection 271 of reaction bevel gear 27, concrete mode is to establish a long block retaining briquetting 31, its end face locking is at body 22, one side vertical surface is torque sensing sheet 30 1 ends that screw lock is located a flexible material, torque sensing sheet 30 1 sides paste solid one can measure the strain sensor 33 of strain, torque sensing sheet 30 other end free ends are leaned against on projection 271 sides, and retaining briquetting 31 adjacent torque sensing sheets 30 sides are cut and are established a part of thickness, keep a mobile space 32 with strain sensor 33 with torque sensing sheet 30, and be equipped with a contrary backing block 222 of stepping on towards torque sensing sheet 30 direction end faces at body 22, it pastes and supports projection 271 sides, and strain sensor 33 is " STRAINGAUGE ", also in a liner, adorn several fine wires, when utilizing the tinsel distortion, the principle that resistance changes is measured the device of strain, so pick out resistance signal lead 36 at strain sensor 33, its other end is access to is fixed on the circuit 35 of retaining briquetting 31 sides, this circuit 35 comprises the voltage source of power supply, amplifying circuit etc.;
Secondly, as Fig. 1,2, the gear hobbing face 273 of reaction bevel gear 27 on sky axle 34, for meshing a transmission bevel gear 26 that is installed in drive link 23 2 ends, drive link 23 cooresponding inner ring surfaces are the flank of tooth, being meshed with the sky axle 34 outer flank of tooth is one, and drive link 23 two ends extended spots respectively are arranged with transmission bevel gear 26, and transmission bevel gear 26 just and reaction bevel gear 27 flank engagement; As Fig. 1,2,5, they axle 34 adjacent drive links 23 overlap a solid Drive ratchet seat 25 again, it is a umbrella tooth, at the solid velocity response sheet 18 of outer circumferential side cover, velocity response sheet 18 is complete rings, equidistantly cut open at periphery and to be provided with separate slot 181, staying surplus equidistant axial vane surface is sensitive surface 182, establish a speed sensor 19 at body 22 towards velocity response sheet 18 locks, the end of Drive ratchet seat 25 adjacent velocity response sheets 18 is for another Fig. 1,2, be arranged with two ratchets 15 in the outside, ratchet 15 cooperates spring buckle 16 and anchors at Drive ratchet seat 25, prepare engaging bevel ratchet wheel 17 in ratchet 15 outsides, its be a umbrella tooth at one end in recess be formed with ratchet face 171, in addition the end outside is fixing for outside thread face 172 and large fluted disc 13 are spirally connected, so ratchet 15 is that the ratchet face 171 of bevel ratchet wheel 17 1 end madial walls is in peripheral snap, 41 engagements of the umbrella flank of tooth of bevel ratchet wheel 17 and driving bevel gear, inboard then just spacer one bearing 12 when being set in day axle 34 of end in addition.At last, opening anchor ring at enclosing cover 14 is arranged with bearing 10, enclosing cover 14 is locked on body 22 seals inside, and form the outside that bearing 10 inner ring surfaces are set in bevel ratchet wheel 17, and the outside thread 172 of bevel ratchet wheel 17 is promptly established connection for large fluted disc 13 spiral shells, large fluted disc 13 exposes to outside the body 22, and fill in oil sealing 11 in sky axle 34 and 17 of bevel ratchet wheels, they axle 34 two ends are affixed cranks, and the assembling of crank is that genus is known, more than is the single-piece assembling instruction.
The single-piece use is promptly as described below:
People's foot pedal is to drive crank, legpower is passed to day axle 34, drive drive link 23 rotations, differential type transmission characteristic of the present utility model, be to comprise drive link 23, transmission bevel gear 26, Drive ratchet seat 25 and 27 configurations of reaction bevel gear, in brief: the rotating speed of Drive ratchet seat 25 rotating speeds+reaction bevel gear 27 rotating speeds=2 times of drive links 23.
Revolution ratio according to this concerns that when legpower place low resistance, day axle 34 drives drive links 23 rotations, and transmission bevel gear 26 is also done the circumference rotation along reaction bevel gear 27 flank of tooth except that rotating around drive link 23, and reaction this moment bevel gear 27 is motionless state; The utility model effect characteristic is: the resistance that causes when foot-operated power is big, then can make transmission bevel gear 26 urge reaction bevel gear 27 a little, make the antagonistic force of reaction bevel gear 27 make projection 271 as Fig. 3,4 press torque sensing sheet 30, torque sensing sheet 30 is moved toward mobile space 32, produce micro-deformation, the resistance value that forms strain sensor 33 changes with this micro-deformation, resistance value sees through resistance signal lead 36 and transfers to circuit 35, form the voltage signal that amplifies and be transferred to controller via lead 37, give electrical motor 40 in order to the controller transmission signal, the auxiliary force that output is fit to.
In addition, as shown in Figure 5, speed sensor 19 sees through and covers relation with the sensitive surface 182 of velocity response sheet 18 simultaneously because of rotation speed relation, and detection signal changes, and reacts the revolution rotating speed of rider's foot-operated crank at that time.
Circuit 35, speed sensor 19 transfer to controller with signal, as shown in Figure 1, see through controller in-to-in formula and calculate the voltage that output is fit to, driving motor 40 and via the transmission of helical wheel 44, driving bevel gear 41, and power is reached bevel ratchet wheel 17 rotations sheathed with day axle 34, then electric power can rotate to drive large fluted disc 13 in conjunction with manpower through bevel ratchet wheel 17, provides to be fit to the power needs of auxiliary legpower instantly; Otherwise, if electrical motor 40 is cut off the electricity supply, and when having only manpower output legpower, because unilateral bearing 20 is located at 44 of driving bevel gear 41 and helical wheels, make day axle 34 so step on crank, large fluted disc 13 transmissions, ratchet 15 makes Drive ratchet seat 25 drive bevel ratchet wheel 17 with ratchet face 171 blockings, 41 rotations of bevel ratchet wheel 17 engagement driving bevel gears, this moment, driving bevel gear 41 was in idling conditions because of the disengaging of unilateral bearing 20, made unlikely drive electrical motor 40, if when stepping on, then ratchet 15 breaks away from ratchet face 171, Drive ratchet seat 25 can not drive bevel ratchet wheel 17 and rotate, and is idling conditions, with the comfortable stability state that guarantees that bicycle drives.
Claims (4)
1. the sensing legpower mechanism of an Electrical Bicycle, the battery box of supply motor electric power and relevant cooperations such as controller are installed in vehicle frame, one body interior forms room to settle electrical motor, the axle winding speed reduction gearing of electrical motor, and laterally run through one day axle is set at body, they axle two ends are to connect to establish crank, pedal, vehicle frame is provided with controller for torsion, the signal input that speed detects, make controller may command motor-output according to this, room at place's sidewall fitted bearing of the relative adjacent side of motor spindle to assemble a driving bevel gear, the one end is the umbrella tooth, the axle head of the other end is sheathed for a unilateral bearing, make driving bevel gear preparation and bevel ratchet wheel orthogonal engagement, this bevel ratchet wheel one end is to be fixed in this external large fluted disc; It is characterized in that:
At sky axle one end the differential type gear drive is set, it comprises drive link, reaction bevel gear, transmission bevel gear, Drive ratchet seat; The at one end coaxial sheathed reaction bevel gear of it axle, the reaction bevel gear is the plane at the face in addition of umbrella tooth, the outside one end vertically is equipped with projection, other establishes a long block retaining briquetting, its end face locking is at body, one side vertical surface screw lock is located torque sensing sheet one end of a flexible material, torque sensing sheet other end free end is leaned against on the projection side, and retaining briquetting adjacent torque sensing sheet side is cut and is established a part of thickness, to keep a mobile space with the torque sensing sheet, the torque sensing sheet pastes solid one in a side of mobile space direction relatively can measure the strain sensor of strain, strain sensor connects a resistance signal lead, termination is on the circuit that is fixed on retaining briquetting side in addition to make it, and this circuit comprises the voltage source of power supply at least, amplifying circuit;
The adjacent reaction bevel gear of it axle overlaps a drive link admittedly, and drive link two ends extended spot respectively is arranged with the transmission bevel gear, the transmission bevel gear can with reaction bevel gear flank engagement.
2. the sensing legpower mechanism of Electrical Bicycle according to claim 1, it is characterized in that: an end of day relative reaction bevel gear of axle runs through body, the other end passes through body openings, cooperate enclosing cover to be covered with sealing at this end opening, and spacer one bearing is located with clasp between day axle one end and the body, and right overhead is being coupling in addition a sheathed clasp and is locating.
3. the sensing legpower mechanism of Electrical Bicycle according to claim 1, it is characterized in that: the cooresponding inner ring surface of drive link is the flank of tooth, a day axle relative position is a gear hobbing face, is one with the drive link engagement.
4. the sensing legpower mechanism of Electrical Bicycle according to claim 1 is characterized in that: body is equipped with one towards torque sensing sheet direction end face and is contraryly stepped on backing block, and its subsides are butted on the projection side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99215632U CN2382648Y (en) | 1999-07-21 | 1999-07-21 | Pedal force sensing mechanism for electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99215632U CN2382648Y (en) | 1999-07-21 | 1999-07-21 | Pedal force sensing mechanism for electric bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2382648Y true CN2382648Y (en) | 2000-06-14 |
Family
ID=34007513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99215632U Expired - Lifetime CN2382648Y (en) | 1999-07-21 | 1999-07-21 | Pedal force sensing mechanism for electric bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2382648Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011069358A1 (en) * | 2009-12-11 | 2011-06-16 | 野宝车料工业（昆山）有限公司 | Torque sensing device on rear axle and electric bicycle |
| CN104129470A (en) * | 2011-10-17 | 2014-11-05 | 姚立和 | Torque sensor |
| CN107161274A (en) * | 2017-06-15 | 2017-09-15 | 天津迪思科博科技发展有限公司 | Torque detection transmission device and electric bicycle power-assisted middle motor applying same |
| CN107664547A (en) * | 2016-07-29 | 2018-02-06 | 长城汽车股份有限公司 | The test device and method of vehicle main retarder spacer load |
-
1999
- 1999-07-21 CN CN99215632U patent/CN2382648Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011069358A1 (en) * | 2009-12-11 | 2011-06-16 | 野宝车料工业（昆山）有限公司 | Torque sensing device on rear axle and electric bicycle |
| CN104129470A (en) * | 2011-10-17 | 2014-11-05 | 姚立和 | Torque sensor |
| CN104129470B (en) * | 2011-10-17 | 2016-05-11 | 姚立和 | Torque sensor |
| CN107664547A (en) * | 2016-07-29 | 2018-02-06 | 长城汽车股份有限公司 | The test device and method of vehicle main retarder spacer load |
| CN107161274A (en) * | 2017-06-15 | 2017-09-15 | 天津迪思科博科技发展有限公司 | Torque detection transmission device and electric bicycle power-assisted middle motor applying same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |