TWI245003B - Motor-driven auxiliary transmission system for bicycle - Google Patents

Abstract

The present invention, regarding a motor-driven auxiliary transmission system for bicycle, is presented The transmission system includes treadles of a transmission unit, connecting through a central axle, the second clutch and a chain wheel dish to drive the bicycle for going forward, also to drive a power unit through the first and the second retarded gears of a retardation unit, the first clutch, the chain wheel dish and a auxiliary back axle to drive the bicycle for going forward. When the velocity of the bicycle meets the predetermined value, the power is off and the treadles through the first clutch indirectly drive the second retarded gear and the first retarded gear to generate electric power or no-load transmission by means of the reverse driving of the transmission axle. The invented characteristics have an intelligent auxiliary power, long driving time, a smaller battery used to reduce the total weight of the bicycle, the charging design by treadling to fulfill the goals of going forward and health, the power unit and the force perception unit having the functions of transmission, generating electric power and simple mechanism.

Description

1245003

Field] 'Fifth, the description of the invention (1) [The technology to which the invention belongs ^ The present invention relates to a transmission bicycle transmission system' which has the wisdom to reduce vehicle weight with a smaller battery, can be stepped on, and the power unit has both transmission and tjxy. Know early. [Previous technology] The system 'specifically refers to a type of electric assist, smart type of auxiliary power, good endurance, stepping forward while stepping on the body while charging, and power generation' and a simple structure.

The auxiliary bicycle transmission system is driven by the pedaling force sensing element on the traditional bicycle. The motor generates auxiliary u. Its power operation mode is divided into two types: independent and proportional. It is independent. No matter how much power is input, the motor will output according to the setting. Assistive power; The proportional design of the towel means that the power input by pedaling is the same as the auxiliary power input by Feng Da. 'For example, 10 units of power are input to the pedal. For the fighters, the motor inputs 30 units of power. Both stand-alone and proportional have the following missing ... [11 poorly designed auxiliary power. As far as stand-alone is concerned, assuming stepping = 20 units of power, the motor fixedly inputs 20 units of auxiliary power, and 'power is 40 units; when the stepping input becomes 10 units of power, the stand-alone = Da still maintains a fixed input. 20 units of auxiliary power. I want to travel with 50 units of power, such as catch, but the motor is fixed to only assist 20 units of power. I ca n’t go uphill or the rider ’s pedaling power is insufficient. When the total power is only 35 units of power, the auxiliary power is automatically increased, and the bicycle cannot travel at a predetermined speed of 50 kilometers per hour.

Page 5 1245003 -------- 5. Fifth, the description of the invention (2). In terms of proportionality, suppose that you want to travel at a speed of 50 units of power, and when you are entering a speed of only 20 units of power, for example, when you are going uphill or the pedaling force of a rider, the motor outputs only 2 in relative proportions. Auxiliary power per unit (,: Power is only 40 units) 'The bicycle cannot travel at a predetermined 50 unit degrees. [2] Poor endurance. No matter what kind of design is used, the motor power is Si to continue the SI battery capacity, electric assist bicycles are only suitable for short and medium, two:] electricity I: ί increase: heavy: ^ to improve the battery life of electric assist bicycles ... Relatively increased vehicle weight, which is one of the lack of conventional use [4] Can not be charged during travel. The burden of conventional light pedaling is used to provide motor power: Electric horse 3: Cannot be charged while traveling during pedaling, which is customary : Structure 2: [5] Separation of transmission and power generation. The design of the conventional knot consumes space on the bicycle. 偁 Separation of the motor from the generator [6] Basically, there are strain gauges and load cells (1) 〇 ^ ά cell., The type of conventional pedaling force sensor, its structure is complicated and the cost is high. 'It can also be translated as "load element". Therefore, how to design a leather unit to eliminate the lack of conventional structure and focus on research and development. That the industry needs [invention content]

The main purpose of the present invention is to provide a smart auxiliary system / secondary purpose of the present invention. The active system has good endurance. / Another object of the present invention is to provide an in-motion system that can be stepped forward, so that the battery can be reduced with a smaller battery. To provide an electric assisted bicycle transmission power. In order to provide a power-assisted bicycle transmission and provide a step-by-step charging design for fitness at the same time, another purpose of the driving system is to provide a power-assisted bicycle transmission.

Simplified L ', the power unit has both transmission and power generation, and the pedaling force sensing unit has an early structure and low cost. The invention provides an electric auxiliary bicycle transmission system, which comprises a transmission unit, a pedaling force sensing unit, a power unit, a reduction unit, a clutch unit and a control unit, wherein: (a) the transmission unit, The system is provided with at least: a central shaft, which is arranged horizontally on the bicycle; a pair of pedals, which are oppositely provided from the two ends of the central shaft, and extend approximately perpendicularly toward the circumferential direction of the central shaft; A position sound provided on the center axis extending outside the bicycle, the sprocket wheel drives the rear wheel of the bicycle; (b) the pedaling force sensing unit is located outside the center axis and is used to sense a pedaling force; (c) The power unit has both transmission and power generation functions; (d) The reduction unit includes at least: a first reduction gear is attached to the power unit, and the power unit

Page 1245003

V. Explanation of the invention (4) • The first reduction of the rotating power of the yuan 'second reduction gear, which is combined with the rotating power of the reading and power unit for the second reduction, a reduction gear, and (e) The clutch unit includes at least a first clutch element, which is coupled to the sprocket disc; drives the second reduction gear-a second clutch element and a central shaft; and drives the second reduction gear (f ) 4 control early yuan 'is used to sue |

, π $, Gudong * Leave-Cushion 4 bundles of the transmission unit, the pedaling force sensing unit "power early, the deceleration unit 亓 Β-from A (Where and the clutch unit together to move the above purpose and advantages of the present invention It is not difficult for the US to obtain an in-depth understanding from the detailed description and drawings of the following selected embodiments. The following examples and the drawings are used to explain the present invention in detail: [Embodiment] The present invention is an electric assist The bicycle transmission system, as shown in the first, second, and third figures, includes a transmission unit 10, a pedaling force sensing unit 20, a power unit 30, a reduction unit 40, and a clutch on a bicycle. A unit 50 and a control unit 60, among which: (a) the transmission unit 10 is provided with at least: a central shaft 11 which is horizontally arranged on the bicycle; a pair of pedals 12 which are connected by the central shaft 11 The two ends of the sprocket extend approximately perpendicularly toward the circumferential direction of the central shaft 11; a sprocket wheel 13 is attached to the central shaft 11 and extends outside the bicycle

1245003

V. Description of the invention (5) The position 'The sprocket wheel 13 is provided with a chain 131 to link the rear wheel 91 of the bicycle 91 (b) The pedaling force sensing unit 20 is provided directly outside the central axis n. The pedaling force sensing unit 2 0 is selected from stick strain gauges (strai η

Gauge), piezoelectric materials, or other similar components that use the pedaling force sensing unit to deform to sense, (c) the power unit 30 is provided with at least one power source 31, which is a motor and generator in this embodiment. The power source 31 is provided with a transmission shaft 311 with a coupling element 312 for transmitting rotational power. The coupling element 312 is selected from a small helical gear, a small bevel gear, or any element that can be coupled with the transmission. (D) The reduction unit 40 includes at least: a first reduction gear 41 that is coupled to the coupling element 312 at an angle of about ninety degrees and decelerates the rotational power of the power source 31 for the first time. For example, the first reduction gear 41 is one selected from a large helical gear and a large bevel gear. A small spur gear 42 is axially fixed at the axial position of the first reduction wheel 41; a second reduction gear A gear 43 is coupled to the small spur gear 42, and the second reduction gear 43 is a large spur gear, and the dynamic reduction is performed for the second time reduction. Of course, regarding the implementation aspect of the reduction unit 40, This power source 31 can be placed horizontally 'between the power source 31 and the sprocket disc 13 < Two straight cross-sectional reduction of transmission 'system is replaced with an equivalent reduction unit 40 of the device; (e) the clutch means 50, based at least comprising: a first clutch member 51, provided on the line 43 and the second reduction gear

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The sprocket wheel a 'and the sprocket disc a' control the transmission state between the second reduction gear 43 and the clutch by a clutch action. The first clutch element 51 is selected from one-way clutches. One of a clutch or a centrifugal clutch; a central shaft 丨 the first-clutch element 52 is provided between the second reduction gear 43 and the mandrel 11 'and controls the second reduction gear 43 and the middle by a clutch action The transmission state of the clutch and the clutch 'The second clutch element 52 is selected from one of a one-way clutch (/ moving clutch or a centrifugal clutch; force sensing) The control unit 60 is used to control the transmission unit 1 0 , The step Yuan Me Zaofan 20, the power unit 30, the reduction unit 40 and the clutch Shanfan system cooperation. Ping 2 is the electric auxiliary bicycle transmission system of the present invention. = Continued to see the first, second, The third, fourth, and fifth diagrams are examples here. A transmission mode illustrates the present invention as follows: > [1] · Travel mode of auxiliary power. The control unit 60 controls the custom car to maintain 50 units of power. Speed. If a rider steps on 20 units of motion The force causes the pedal 12 to drive the central shaft 11, and the central shaft 11 drives the sprocket 13 'via the second clutch element 5 2 and drives the bicycle through the rear wheel 91 of the bicycle. The pedal 12 generates a pressing force f, and in the process of transmitting the pressing force F, the central axis 丨 and the pedaling force sensing unit 2o generate a slight amount of bending. The pedaling force sensing unit 20 measures a bending stress and pushes it apart. A corresponding voltage value is obtained, which represents the rider's stepping power input of 2Q units, that is, the auxiliary power of 30 units is still lacking. Therefore, as long as the power source 31 (a motor that can output power at this time)

1245003. V. Description of the invention (7) '---- Inputting 30 units of auxiliary power can achieve the desired speed of 50 units. In more detail, the power source 31 drives the first reduction gear 41 of the reduction unit 40 via the engaging element 312 of its transmission shaft 3 丨 丨, and the first reduction gear 41 uses the rotational power of the power source 31 as the first The second reduction gear 41 rotates through the small spur gear fixed in the axial direction to interlock the second reduction gear 43. The second reduction gear 43 decelerates the rotational power of the power source 31 for the second time. At this time, the second reduction gear 43 transmits 30 units of auxiliary power compensation to the sprocket disc 13 via the first clutch element 51. Therefore, 20 units of power stepped on by the human power plus 3 of the power source 31 are rotated. The unit's auxiliary power adds up, even if the bicycle maintains 50 units of power. Similarly, if the human pedaling power portion increases, the auxiliary power input of the power source 31 can be immediately reduced, and it can still maintain a fixed 50 unit. The total power wheel enters °, [2] · Pure foot travel mode. When the vehicle speed reaches the auxiliary speed limited by the power unit 30, a speed sensor 9 2 (see the first figure) measures a revolution voltage signal And send it to The control unit 60 controls the power unit 30 to stop running. At this time, all the power is transmitted to the center by the pedal 12> ^ axis 11 'the central axis 丨 丨 via the second clutch element 52 and The first clutch element 51 drives the sprocket wheel 13 and drives itself through the rear wheel 91 of the bicycle. [3] · Travel mode of power unit power generation. When the vehicle speed reaches the auxiliary vehicle speed limited by the power unit 30, the control unit 60 controls the The power unit 30 stops running. At this time, the power of stepping on the pedal i 2 is transmitted from the central axis through the second axis.

Page 11 1245003. V. Description of the invention (8) The clutch 52 and the first clutch element 51 are transmitted to the sprocket disc i3, and the bicycle rear wheel 91 drives the bicycle to travel. The power of stepping on the pedal 12 is transmitted indirectly through the first clutch element 51 to the second reduction gear 43, the small spur gear 42, the first reduction gear 41, and the coupling element 312. Power source 31 (generator capable of generating σ at this time). At this time, if the capacity of the battery 93 on the bicycle is in a state of being charged, power is generated to supplement the battery power. If the battery capacity is sufficient, the power source 31 rotates at no load. . Please refer to the seventh figure. In order to respond to the charging of the battery 93, the present invention may also be provided with a controllable clutch 70. As long as the bicycle is controlled in the power generation mode, the power of the foot pedal 12 is indirectly transmitted to the controllable clutch 70. The second reduction gear 43, the small spur gear 42, the first reduction gear 41, and the humming element 312 drive the power source 3 (the power generator 31 at this time) in the reverse direction by the transmission shaft 3 11 and the power source 31 That is, the power of the supplementary battery 93 is generated. This design can not only reduce the capacity of the battery 93 to reduce the total weight of the bicycle, but also charge it halfway to increase the performance and increase the resistance when pedaling. It also has the effects of leg exercise and fitness. [4] · Travel mode without pedal (ie trolley). When the pedal 12 is not stepped on, the transmission unit 10 and the power unit 30 have no power output. It is provided to propel the bicycle by hand or ride on the bicycle and propel the bicycle with feet. The bicycle is on the move and thereafter The wheel 91 will link the sprocket wheel 13 through the chain 131, so: because the rotation speed of the sprocket wheel 13 is greater than the rotation speed of the second reduction gear 43, the second clutch element 52 is separated, that is, the first Two reduction gears 43 and

Page 12 1245003 V. Description of the invention (9) The sprocket wheel 1 3 is separated. Since the pedal 12 is not depressed, the rotation speed of the sprocket wheel 13 is greater than the rotation speed of the central shaft 11, so the first clutch element 51 is separated, that is, the central shaft 11 is separated from the sprocket wheel 13. In this way, there is no interlocking resistance inside the bicycle and the bicycle can be pushed lightly. In more detail, the configuration path of the transmission system of the present invention is as follows (see the sixth figure): / [1] · Auxiliary power path, including: Off · Coupling unit 50 Combines the central axis η with the sprocket disc, steps on The power generated by the pedal 12 is transmitted to the central axis via a first path 81, and the central axis 11 drives the sprocket disc 3 via a second path 82. (This part of the transmission path is also "Travel mode"; the first clutch element 51 combines the second reduction gear 43 and the sprocket disc 13; the power output by the power unit 30 is transmitted to the reduction unit 40 via a third path 83, and the speed is reduced After the unit 40 links the central shaft 11 through a fourth path 84, the central shaft 11 drives the sprocket disc 13 in conjunction with the pedal 12 through a fifth path 85. [2] · Power generation path: The second clutch element 52 combines the central shaft 11 and the sprocket wheel 13, and the first clutch element 51 combines the second reduction gear 43 and the sprocket wheel 13 ′ foot pedal 1 The power of 2 is transmitted to the central axis via a sixth path 86. The central axis 11 drives the deceleration unit 40 in a reverse direction via a seventh path 87, and the deceleration unit 40 reverses two via an eighth path 88. Sub-acceleration drives the power unit

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3 0 power generation. The advantages and effects of the present invention can be summarized as: [1] Intelligent auxiliary power. Suppose there are 5. The power input of the unit, t the pedaling force sensing unit 2. The power of single two ’is automatically controlled by the control unit. The deceleration early adjusts the input of 30 units of auxiliary power to enable the bicycle to input power at the ft position. In the same way, if you only step on the input power of 〇〇, you will supplement the auxiliary power of 40 units to maintain a fixed power input of 50 units. Therefore, there is no need for the rider to control the adjustment separately, and the burden of riding = is also reduced. Soap [2] has good endurance. The invention utilizes the engagement of a one-way clutch to generate power in the power unit during the pedaling process, and replenishes the battery at any time to maintain sufficient power to drive the motor, so the endurance is good. [3] Reduce vehicle weight with smaller batteries. The power unit of the present invention is designed for both transmission and power generation. When the bicycle is stepped on, the battery is charged. Therefore, a smaller battery can be selected to reduce the weight of the vehicle. [4] Designed to step forward while stepping on the treadmill. During the fitness process of riding a bicycle, the battery is charged by the power unit at the same time, and you do not need to wait for the battery to charge. In addition, the resistance during charging is greater, and it can have both leg exercise and fitness and battery charging. [5] The power unit combines transmission and power generation. The single power unit of the present invention has both transmission and power generation, and the effect of two components is simultaneously exerted by a single / element, the number of elements is reduced, and the space consumption of the bicycle can be reduced. [6] Simple structure of pedaling force sensing unit. Stepping force sensing sheet of the present invention

Page 14 1245003 V. Description of the invention (π) The element system is directly attached to the central axis with an adhesive strain gauge. As long as the pedal is pressed to deform the central axis up and down, the pedaling force value is measured. The structure is simple, the cost is low, and it is not easy to damage. The above is only a detailed description of the present invention through a preferred embodiment, and any simple modifications and changes made to the implementation will not depart from the spirit and scope of the present invention. From the above detailed description, those skilled in the art can understand that the present invention can indeed achieve the aforementioned purpose, and it has indeed complied with the provisions of the Patent Law, and filed an application for an invention patent.

Page 151245003 Brief description of the drawings [Simplified description of the drawings] The first diagram is a schematic diagram of an embodiment of the present invention applied to a bicycle. The second diagram is a schematic diagram of an embodiment of the present invention. The third diagram is a sectional plane of the present invention. The fourth diagram is an enlarged schematic view of a part of the structure of the present invention. The fifth diagram is a schematic diagram of the partial structure operation of the fourth diagram. The sixth diagram is a power flow chart of a part of the transmission mode of the present invention. The seventh diagram is another diagram of the present invention. Example diagram [Description of main component symbols] 10 Transmission unit 11 Central shaft 1 2 Pedal 1 3 Sprocket disc 1 3 1 Chain 2 0 Pedal force sensing unit 30 Power unit 3 11 Transmission shaft 4 0 Reducer unit 42 Small spur gear 50 Clutch unit 52 Second clutch element 7 0 Controllable clutch 8 2 Second path 8 4 Fourth path 8 6 Sixth path 8 8 Eighth path 9 2 Speed sensor 3 1 Power source 3 1 2 Coupling element 4 1 First deceleration Gear 43 second reduction gear 5 1 first clutch element 6 0 control unit 8 1 first path 8 3 third path 8 5 fifth path 8 7 seventh path 91 rear wheel 93 battery

Page 16 1245003 Schematic description of F-pressure »

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Claims (1)

1245003 6. Scope of patent application 1. An electric auxiliary bicycle transmission system, which includes a transmission unit, a pedaling force sensing unit, a power unit, a reduction unit, a clutch unit and a control unit on a bicycle, among which: (a) The transmission unit is provided with at least: a central shaft, which is arranged horizontally on the bicycle; a pair of pedals, which are oppositely extended from the two ends of the central shaft, and extend approximately perpendicularly toward the circumferential direction of the central shaft. ; A sprocket disc is provided at a position where the central shaft extends outside the bicycle, and the key wheel disc drives the rear wheel of the bicycle; > (b) the pedaling force sensing unit is provided outside the central shaft and used To sense a stepping force; (c) the power unit has both transmission and power generation functions; (d) the reduction unit includes at least: a first reduction gear coupled to the power unit, and the power The unit's rotating power is decelerated for the first time; a second reduction gear is coupled to the first reduction gear, and the rotation power of the power unit is decelerated for the second time; (e) the clutch The element includes at least: a first clutch element that drives the second reduction gear and the key wheel disc in a clutch action, and a second clutch element that drives the second reduction gear and the central shaft in a clutch action; ( f) The control unit is used to control the integration of the transmission unit, the pedaling force sensing unit, the power unit, the reduction unit and the clutch unit Page 18 1245003 6. Application for Patent Scope 2 · The electric auxiliary bicycle transmission system according to item 1 of the scope of patent application, wherein: the pedaling force sensing unit is directly provided on the central shaft; the sprocket disc is provided with a chain to drive the rear wheel of the bicycle; the power unit At least one power source is provided, and the power source is provided with a transmission shaft with a coiled element to transmit rotational power; the first reduction gear is adapted to the wound engagement element at an angle of about ninety degrees, and rotates the power of the power source For the first deceleration, a small straight I gear train is axially fixed at the axial position of the first reduction gear; the second reduction gear is coupled to the small spur gear, and the rotational power of the power source is used as the first Secondary deceleration; the power source of the reduction unit can be placed horizontally, and two sets of reduction spur gear pairs are set between the power source and the sprocket disc, which are equivalent replacement devices of the reduction unit; the first clutch element, which is set Between the second reduction gear and the sprocket disc; the second clutch element is disposed between the second reduction gear and the central shaft |. 3. The power-assisted bicycle transmission system according to item 2 of the scope of the patent application, wherein: the pedaling force sensing unit is selected from the group consisting of an adhesive strain gauge, a piezoelectric material, or a component that is deformed and sensed by the pedaling force sensing unit; the power source Department of motor and generator; Page 19, 124503 (Sixth, the scope of the patent application The coupling element is selected from the elements of small coupling transmission; helical gears, small umbrellas; the first one; the reduction gear train is selected from the large helical gears, the large 4 the first Second, the first clutch or if applying for special unified control, one of which is a pedal-controllable wheel, a small straight-moving shaft drive and reduction gear, and a second centrifugal profit range. The self-made clutch power passes the gear and the power train is a large straight. The gears and clutch elements are all selected from one-way clutches. The electric assistance _ driving described in item 2 also includes: the device is used to control the bicycle when the controllable clutch is indirectly transmitted to the first reduction gear and coupled. Yuankeyuan 'This power source is a power generation supplement. 5. The electric auxiliary self-control system as described in item 1 of the scope of patent application, wherein the transmission system also includes an auxiliary power path, and one by the sprocket, The power generated by stepping on the pedal passes through the first axis to the central axis, and the central axis passes through a second root and disk. The path of this part is also the first step of the pure pedal transmission system. The power output from the two reduction gears and the key force source is transmitted to the deceleration unit via a third path, and the central axis is linked to the fourth path via a fourth path, and a fifth path drives the sprocket disc in conjunction with the pedal; a wheel or any The t-shaped # wheel has its coupler and electric driving system in electric mode. The foot has the second reduction gear and is reversed. A battery electric driving system is connected to the center. The key wheel is transmitted by a path; the second is driven by the wheel. The dynamic speed unit, the central shaft passing through 12450003 6. The patent application scope of a power generation path, the second clutch element combines the central shaft with the sprocket disc, and the first clutch element combines the second deceleration The power of the gear and the sprocket wheel and the pedal is transmitted to the central shaft through a sixth path, and the central shaft drives the reduction unit in a reverse direction through a seventh path. Sub-acceleration drives the power source to generate electricity. Page 21