WO2011026275A1

WO2011026275A1 - Sensing device for speed and stepping force of electric bicycle

Info

Publication number: WO2011026275A1
Application number: PCT/CN2009/074305
Authority: WO
Inventors: 秦生官
Original assignee: 苏州工业园区同盛车业有限公司
Priority date: 2009-09-02
Filing date: 2009-09-29
Publication date: 2011-03-10
Also published as: CN101638135B; CN101638135A

Abstract

A sensing device for speed and stepping force of an electric bicycle includes a stressed frame (1) pivoted with the electric bicycle. Said stressed frame (1) is provided with transition chain wheels (11) meshed with a chain (2) of the electric bicycle in transmission and a sensor (3). Said sensor (3) comprises a hall base (31) fixed with the stressed frame (1) and a magnetic steel base (32) mounted on the outer side of said hall base (31). Said hall base (31) generates induction with the magnetic steel base (32) to measure the speed and the stepping force. The sensing device can detect the stepping force and the speed of the electric bicycle, thereby realizing an intelligent electric power assisted control function.

Description

Instruction manual

Speed pedaling device for electric bicycle

Technical field

[1] The present invention belongs to the field of speed pedaling test and transmission technology of a thousand electric bicycles. Specifically, it relates to a speed pedaling sensing device for an electric bicycle that intelligently provides electric power according to the speed pedaling test result of the electric bicycle, and the device is installed on the electric bicycle. Upper, and in combination with the chain, the tension of the chain and the running speed of the chain are determined by meshing with the chain.

Background technique

[2] In recent years, electric bicycles have gradually become accepted by consumers as an environmentally-friendly and energy-saving vehicle. The sales of electric bicycles are increasing year by year, and the trend of replacing bicycles is becoming more and more obvious.

[3] Electric bicycles can be divided into two categories: all-electric bicycles and smart-assisted electric bicycles. Domestic electric bicycles are mainly all-electric electric vehicles; while European and American countries mainly focus on intelligent-assisted electric vehicles. Smart-assisted electric bicycles, commonly known as electric bicycles with power assist systems (Power Assistant System,

PAS). In order to achieve the purpose of intelligence, a lot of research work has been done at home and abroad, so that the purpose of using electric vehicles in the use of deaf people is consistent with the driving power of the car.

[4] At present, this kind of power assisted system is mainly divided into two categories in principle: a type of torque sensing, which detects the purpose of the person by the change of the pedaling force of the person, if When the pedaling force used by the person increases, the system detects this demand of the person, and increases the output power of the motor through the controller; and vice versa. The other is the speed sensing method, which adjusts the motor pulse or number of revolutions of the controller by detecting the running speed of the bicycle. This approach is often the opposite of people's "willingness." This type of electric vehicle often has a speed 吋 motor boost; and no speed is not strong. When the electric car is riding on the top or the top wind, the speed of the S inch is often low, and the force is relatively small, which does not have the effect of intelligent power. In the prior art, the electric bicycle power assisting system is basically a sturdy type, and the Hall element and the magnetic steel are installed in the coupling shaft portion, and the motor starts to start at a certain speed, and the electric motor is fully controlled after starting. Very low, simple process, but its riding feel is also poor, unable to provide accurate power change.

Summary of the invention

[5] The object of the present invention is to provide a speed pedaling sensing device for an electric bicycle, which can detect the pedaling force and detect the speed of the electric bicycle, thereby realizing an intelligent electric power assisting control function.

[6] In order to solve the problems in the prior art, the technical solution provided by the present invention is:

[7] A speed pedaling device for an electric bicycle, comprising a force frame pivotally connected to the electric bicycle, wherein the force frame is provided with a transition sprocket that meshes with the electric bicycle chain, and is characterized by the force The frame is further provided with a sensor, the sensor comprises a Hall seat fixed to the force frame, a magnetic steel seat disposed outside the Hall seat, and the Hall seat and the magnetic steel seat sense the speed pedaling force.

[8] Preferably, the force receiving frame comprises a bolt-fixed double-layer cover plate, and the transitional sprocket includes a first sprocket and a second sprocket disposed between the double-layer cover plate and the cover plate. Electric bicycle chain and electric bicycle

1

Replacement page (Article 26) After the toothed disc is engaged, the lower end of the first sprocket and the upper end of the second sprocket are respectively meshed and transmitted.

Preferably, the sensor bracket is fixedly disposed on the cover of the force frame, and the sensor bracket is provided with a Hall seat including a linear Hall sensor and a switch Hall sensor, and the sensor bracket is connected and fixed on the fixed block. The pedaling test magnet.

Preferably, the speed test magnetic steel is coaxially disposed on the end surface of the second sprocket, and the Hall seat is close to the end surface of the second sprocket and is matched with the speed test magnet.

Preferably, the switch Hall sensor is disposed on the outer side of the second sprocket end face and the speed test magnet on the end face of the second sprocket; the outer side of the linear Hall sensor and the pedal force connected to the sensor bracket through the elastic member Test the magnetic steel with induction.

Preferably, the elastic member is an elastic piece fixed to the Hall seat, the elastic piece is provided with a fixing block, the one end of the fixing block is provided with a pedaling test magnetic steel, and the other end is provided with a compression spring and a steel ball respectively connected with the positioning seat. .

Preferably, the cover plate is a triangular cover plate, and a positioning seat is arranged between the force frame and the electric bicycle tooth plate

The positioning seat is pinned to the end of the double-layer cover of the force frame, and the lower end of the force frame is provided with an adjusting bolt to connect the positioning seat, and the adjusting bolt is provided with a return spring.

Preferably, the electric bicycle sprocket wheel is fixed on the coupling shaft, the coupling shaft is sleeved to set the seat, and the bearing is disposed between the positioning seat and the coupling shaft.

Preferably, the positioning base is provided with a support frame and an electric bicycle; the electric bicycle sprocket wheel and the positioning seat are provided with a pressing plate fixed to the positioning seat, and the pressing plate and the positioning seat cooperate with the axial limiting bearing. Preferably, a bearing is disposed between the transition sprocket between the force-receiving cover plate and the pin of the positioning transition sprocket; the electric bicycle sprocket wheel and the transition sprocket are on the same tooth center surface; Human-driven crank.

The advantages of the present invention over the prior art solutions are:

In the speed pedaling sensing device of the present invention, when the user turns the crank with a force pedal, the upper half of the chain engaged with the crankset generates a tensioning force which causes the transition sprocket of the engaging chain to generate a reverse needle direction. The torque causes the force frame to rotate; the compression spring compresses and deforms due to the rotation of the force frame, and the deformation amount is proportional to the chain tension; and the compression spring compression deformation is equal to the displacement of the pedal force test magnet, so the chain tension is tight. The force is proportional to the change detected by the linear Hall sensor, which allows the compression spring compression deformation to be displayed in the linear Hall sensor. Since the tension of the chain directly reflects the size of the pedaling force, the linear Hall sensor and the set pedaling force test magnet can directly reflect the magnitude of the pedaling force to control the increase and decrease of the electric assist. The speed test magnet is set on the end face of the transition sprocket. Through the speed test, the magnet can be used in the sprocket operation and the sensor of the switch Hall sensor to know the rotation speed of the transition sprocket, so as to obtain the running speed of the bicycle; The electric power of the electric bicycle is controlled by considering both the pedaling force and the riding speed.

DRAWINGS

The present invention is further described below in conjunction with the accompanying drawings and embodiments:

1 is a schematic structural view of a speed pedaling force sensing device for an electric bicycle according to an embodiment of the present invention;

Figure 2 is an enlarged view of A of Figure 1; FIG. 3 is a schematic structural diagram of a sensor of a speed pedaling force sensing device according to an embodiment of the present invention; FIG.

4 is a schematic structural view of a second sprocket of a speed pedaling force sensing device according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a pressure plate of a speed pedaling force sensing device according to an embodiment of the present invention.

[25] Where: 1 is the force frame; 2 is the chain; 3 is the sensor; 4 is the sprocket wheel; 5 is the positioning seat; 6 is the coupling shaft; 7 is the crank;

[26] 11 is a transition sprocket; 12 is a cover; 13 is a sensor bracket; 14 is an elastic member; 15 is an adjusting bolt;

16 is a return spring; 31 is a Hall seat; 32 is a magnetic steel seat; 33 is a fixed block; 34 is a compression spring; 35 is a steel ball; 51 is a support frame; 52 is a pressure plate;

[27] 111 is the first sprocket; 112 is the second sprocket; 311 linear Hall sensor; 312 is the switch Hall sensor

321 is the pedaling test magnet; 322 is the speed test magnet.

detailed description

[28] The above scheme will be further described below in conjunction with specific embodiments. It is to be understood that the examples are intended to illustrate and not to limit the scope of the invention. The implementation conditions used in the examples can be further adjusted according to the conditions of the specific manufacturer, and the unspecified implementation conditions are usually the conditions in the conventional experiment.

[29] Example

As shown in FIG. 1 to FIG. 5, the speed pedaling sensing device of the electric bicycle includes a force receiving frame 1, a positioning seat 5, and a sensor 3. The positioning seat 5 is disposed between the electric bicycle crankset 4 and the force frame, and is stressed. The frame 1 is provided with a transition sprocket 11 meshed with the electric bicycle chain 2, and the sensor 3 is fixedly disposed on the force frame 1. The sensor 3 includes a Hall seat 31 fixed to the force frame, and a magnetic steel disposed outside the Hall seat Seat 32, Hall seat and magnet holder 32 sense the speed pedaling force.

[30] The force frame 1 includes a bolt-on double-layer cover 12, and the transition sprocket 11 includes a first sprocket 111 and a second sprocket 112 disposed between the double-layer cover 12 and pinned to the cover plate, the electric bicycle After the chain 2 is meshed with the electric bicycle crankset 4, it is meshed with the lower end of the first sprocket 111 and the upper end of the second sprocket 112, respectively. The sensor holder 13 is fixedly disposed on the cover 12 of the force frame 1. The sensor holder 13 is provided with a Hall seat 31 including a linear Hall sensor 311 and a switch Hall sensor 312. The outside of the sensor holder 13 is fixedly connected to the fixed block 33. Test the magnetic steel 321 by the pedaling force.

[31] The switch Hall sensor 312 is disposed outside the end face of the second sprocket and coupled with the speed test magnet 322 on the end face of the second sprocket; the outer side of the linear Hall sensor 311 is connected to the sensor holder 13 via the elastic member 14. The pedaling test magnet 321 is matched with induction. The end of the second sprocket 112 is coaxially disposed with a speed test magnet 32 2 , and the Hall seat 31 is adjacent to the end face of the second sprocket and is coupled with the speed test magnet 322.

[32] The elastic member is an elastic piece fixed to the Hall seat, and the elastic piece is provided with a fixing block 33. The one end of the fixing block is provided with a pedaling test magnet 321, and the other end is provided with a compression spring 34 and a steel ball 35 connected to the positioning seat 5. The cover plate is a triangular cover plate, and a positioning seat 5 is arranged between the force frame and the electric bicycle tooth plate; the positioning seat is pinned to the end of the double-layer cover plate of the force frame, and the adjusting bolt 15 is arranged at the lower end of the force frame to connect the positioning seat. A return spring 16 is provided on the adjusting bolt.

[33] The electric bicycle crankset is fixed on the coupling shaft 6, and the coupling shaft 6 is sleeved on the setting seat 5, and a bearing is arranged between the positioning seat 5 and the coupling shaft 6. The positioning base 5 is provided with a support frame 51 and an electric bicycle. The electric bicycle sprocket wheel and the positioning base 5 are provided with a pressing plate 52 fixed to the positioning seat. The pressing plate 52 and the positioning seat 5 cooperate with the axial limiting bearing. The bearing between the transition sprocket between the force-receiving cover and the pin of the positioning transition sprocket is disposed; the electric bicycle sprocket wheel and the transition sprocket are on the same tooth center surface; the two ends of the coupling shaft 6 are connected with the human-driven crank 7.

[34] The force frame 1 and the positioning seat 5 can move relative to each other. The force frame 1 is pinned to the end of the positioning base 5, and the positioning seat is fixed to the electric bicycle through the support frame 51, and since the support frame 51, the coupling shaft and the pin shaft are determined at three points, the positioning seat 5 is not operated on the electric bicycle. Deflection occurs. Such a three-point positioning also causes the force frame attached to the positioning pin to be deflected, thereby ensuring that the force and speed of the transition sprocket are not disturbed by the deflection. Mounting 吋, the coupling shaft is sleeved with a bearing, the positioning seat is fixed with the outer casing of the bearing, and the inner cymbal of the bearing is fixed with the coupling shaft; thus the sprocket wheel, the crank and the pedal connected to the end of the crank are synchronously moved, the coupling shaft does not Influencing the positioning seat, the designing of the pressing plate and the positioning seat is fixed to the axial limiting bearing, so that the tooth plate and the positioning seat generate relative rotation, and the axial distance remains unchanged.

[35] In order to keep the tooth center plane of the crankset in the same plane as the tooth center plane of the transition sprocket, except that the positioning bracket and the bearing frame are axially fixed by the support frame 51, the coupling shaft and the pin shaft吋, the force frame is designed as a double-layer cover structure, and the transition sprocket includes a first sprocket 111 and a second sprocket 112 disposed between the double-layer cover plates, and has a tooth center surface and a tooth center surface Level. More specifically, a sprocket fixing shaft is disposed between the double-layer cover plates, and a bearing is disposed between the transition sprocket and the fixed wheel of the sprocket, the transition sprocket is fixed with the outer casing of the bearing, and the fixed shaft of the sprocket is fixedly connected with the inner ring of the bearing This ensures the relative rotation of the transition sprocket and the force frame, and also keeps the axial distance between the sprocket fixed shaft and the transition sprocket unchanged.

[36] In addition, in order to reset the force frame after the force is rotated, the adjusting bolt is arranged between the lower end of the force frame and the positioning seat, and the adjusting bolt can be set on the one hand to change the different height positions of the two transition sprocket, so as to satisfy the riding. On the other hand, the reset spring is arranged on the adjusting bolt so that the sprocket can be reset without being subjected to the force rig, so as to facilitate the riding motion without the electric assist.

[37] The Hall sensor 31 and the magnet seat 32 inductively coupled with the Hall seat 31 are designed and installed in the sensor of the device, wherein the Hall block includes a linear Hall sensor and a switch Hall sensor; and the magnet seat includes the pedal force Test magnetic steel and speed test magnetic steel. Wherein the speed test magnet is distributed on the end face of the transition sprocket, specifically coaxially disposed on the end face of the second sprocket 112; where the speed test magnet may be multiple, one may be; when the transition sprocket is rotated, the speed The synchronous rotation of the magnetic steel is tested, which is inductively opened and closed with the switch Hall sensor. The extremely prominent design of the present invention is to test the strain design of the magnetic steel. Specifically, the pedaling test magnetic steel corresponds to the linear Hall sensor and is fixed on the fixed block, and the two ends of the fixing block are connected to the Hall by an elastic member, such as an elastic piece, and the outer side of the fixed block is respectively The compression spring and the steel ball are arranged to be connected with the positioning seat; since the positioning seat does not rotate after being pressed by the force frame, when the rotating motion of the force frame generates a flaw, the positioning seat pushes the steel ball to move, and the compression spring compresses; the compression of the compression spring The magnetic steel fixed on the fixed block is displaced to cause induction of the linear Hall sensor.

[38] In order to explain more specifically the principle of detecting the pedaling force by the linear Hall sensor, the stress of the device in this embodiment is explained first. When the pedal rotates the crank fixed at both ends of the coupling shaft, the crank drives the crankshaft to rotate through the coupling shaft, and then the chain pulley drives the transition sprocket; the upper half of the chain and the lower end of the first sprocket The upper end of the second sprocket is engaged, and the chain is not in a straight line, so that under the force generated by the crank, the upper half of the chain generates a corresponding tension, the tensioning force makes the first sprocket, the first The two sprocket wheels produce two forces in opposite directions, which forces the force frame to produce a winding The tendency of the pin to rotate downward in the axial direction, and the force is equal to the tension of the chain; when the force frame is rotated downward, the fixed block of the fixed pedal test magnetic steel moves upward under the action of the fixed positioning seat to drive the compression The spring is compressed and deformed, and the pedaling force tests the displacement of the magnet.

[39] The linear Hall sensor and the pedal force test magnet in this device detect the pedaling force as follows: The linear Hall sensor is mounted on the Hall seat, the outside of which is set with the pedaling test magnet, and the Hall seat is connected by the elastic member to fix the pedaling force test. Fixed block of magnetic steel. The pedaling force test magnet used in the device is a single piece of magnetic steel, which generates a magnetic field, which is a permanent magnet and is fixed on the fixed block with a resin glue. The tension of the chain forces the force frame to shift, so that the fixed block moves, and the pedaling test magnet fixed on the fixed block generates the same displacement, which is captured by the linear Hall sensor and transmitted to the electric controller. .

[40] In this embodiment, the speed test magnet is disposed on the end face of the transition sprocket; the speed test magnet may be one, which may be multiple; when the upper part of the chain engages the transition sprocket drive, the transition sprocket rotates to drive The speed test magnet rotates synchronously. The process of detecting the speed of the switch Hall sensor and the speed test magnet in this embodiment is as follows:

[41] Since the rotational speed of the transition sprocket is proportional to the riding speed of the electric bicycle, and the transition sprocket is coaxially set with the speed test magnetic steel, the rotational speed of the transition sprocket can be realized by detecting the rotational speed of the magnetic steel by the detecting speed. In this embodiment, the Hall block includes a switch Hall sensor, and the switch Hall sensor is fixedly disposed near the end face of the transition sprocket (in the embodiment, the second sprocket), and the distance between the speed test magnet and the switch Hall sensor is ensured. Recently, the switch Hall sensor produces a signal output. When only one speed test magnet is set on the transition sprocket, the speed of the signal output frequency of the switch Hall sensor directly reflects the speed change of the transition sprocket. Of course, this type of switch detection can also be implemented by means of photoelectricity, dictionary sensing, and the like.

[42] In this embodiment, a support frame 51 is disposed on the positioning seat, and the support frame can be screwed and fixed to the positioning seat. The position of the support frame 51 prevents the positioning seat from generating a jump, thereby causing the speed pedaling device. Detection error; Of course, the support frame 51 and the positioning seat are designed to be screwed, which can facilitate the positioning and positioning of the positioning seat; and the height adjustment of the positioning seat can also be performed.

[43] The speed information and the pedaling force change information detected by the speed pedaling force sensing device provided by the embodiment are controlled by the corresponding control circuit to complete the driving motor control of the electric power assisting system, thereby realizing the intelligent human power ratio of the electric bicycle. distribution.

The above-mentioned examples are only for explaining the technical idea and the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement them, and the scope of the present invention is not limited thereto. Equivalent transformations or modifications made in accordance with the spirit of the invention are intended to be included within the scope of the invention.

Claims

Claim

1. A speed pedaling sensing device for an electric bicycle. The utility model comprises a force frame pivotally connected to the electric bicycle. The force receiving frame (1) is provided with a transitional sprocket (eg) which is meshed with the electric bicycle chain (2). . . , characterized in that the force receiving frame (1) is further provided with a sensor (3), the sensor (3) comprises a Hall seat (31) fixed to the force frame, and the outside of the Hall seat is arranged The magnetic steel seat (32), the Hall seat and the magnetic steel seat (32) sense the speed pedaling force.

2. The speed pedaling sensing device for an electric bicycle according to claim 1, wherein the force receiving frame (1) comprises a bolt-mounted double-layer cover plate (12), and the transitional sprocket (11) comprises a first sprocket (1U) and a second sprocket (112) that are pinned to the cover plate between the double cover plates (12). After the electric bicycle chain (2) is engaged with the electric bicycle sprocket wheel (4) Separate with the first sprocket (111) lower end and the second sprocket

(112) The upper end engages the drive. '

The speed pedaling device of the electric bicycle according to claim 2, characterized in that the cover (12) of the force receiving frame (1) is also fixedly provided with a sensor bracket (13), the sensor bracket ( A Hall block (31) including a linear Hall sensor (311) and a switch Hall sensor (312) is disposed on the outer side of the sensor holder (13), and the pedal test magnetic steel fixed on the fixed block (33) is attached ( 321).

^4. The speed pedaling force transmitting device for an electric bicycle according to claim ^2, wherein a speed test magnet is coaxially disposed on an end surface of the second sprocket (112) (322)

;), the Hall seat (31) is close to the end face of the second sprocket and is coupled with the speed test magnet (322).

5. The speed pedaling force sensing device for an electric bicycle according to claim 2, wherein said switch Hall sensor (312) is disposed at a speed test magnetic field on an outer side of the second sprocket end face and the second sprocket end face. The steel (322) is fitted with induction; the outer side of the linear Hall sensor (311) is coupled with the pedaling test magnet (321) connected to the sensor holder (13) via the elastic member (14).

The speed pedaling force sensing device for an electric bicycle according to claim 5, wherein the elastic member is an elastic piece fixed to the Hall seat, and the elastic piece holds a fixing block (33), One end of the fixed block is provided with a pedaling test magnet (321), and the other end is provided with a compression spring (34), and the steel ball (35) is respectively connected with the positioning seat (5)

The speed pedaling force sensing device of the electric bicycle according to claim 2, wherein the cover plate is a triangular cover plate, and a positioning seat (5) is disposed between the force receiving frame and the electric bicycle crankset; The positioning seat is pinned to the end of the double-layer cover of the force frame, and the adjusting bolt (15.) is arranged at the lower end of the force frame to connect the positioning seat, and the adjusting bolt is provided with a return spring (16)=

6

Replacement page (Article 26) 8. The speed pedaling force of the electric bicycle according to claim 6, wherein the electric bicycle crankset is fixed on the coupling shaft (6), and the coupling shaft (6) is set on the upper seat. (5), a bearing is arranged between the positioning seat (5) and the coupling shaft (6).

9. The speed pedaling sensing device for an electric bicycle according to claim 8, wherein the positioning base (5) is provided with a support frame (51) fixed to the electric bicycle; and the electric bicycle crankset and the positioning seat ( 5) A pressure plate (52) fixed to the positioning seat is arranged, and the pressure plate (52) and the positioning seat (5) cooperate with the axial limit bearing.

10. The speed pedaling sensing device for an electric bicycle according to claim 2, wherein a bearing is disposed between the transition sprocket between the force receiving cover and the pin of the positioning transition sprocket; The transition sprocket is on the same tooth center plane; the coupling shaft (6) is connected at both ends to a human-driven crank (7).

Replacement page (Article 26)