JP3203473U - Torque gear structure - Google Patents

Abstract

The present invention provides a torque gear structure that enhances the applicability to be used by being attached to a structure, and is highly convenient for the attachment structure. A torque gear structure includes an inner fitting cover, a gear base, and a crank. A through hole for attaching the bottom bracket shell of the bicycle is formed in the central portion of the inner cover 10. A plurality of induction coils are provided around the inner fitting cover 10 with the through hole as a center. The gear base 20 is laminated on the inner cover 10. A pivot attachment hole 21 is formed in the central portion of the gear base 20, and three accommodating arc-shaped tanks 22 are recessed in one side surface with the pivot attachment hole 21 as the center. An elastic member 23 is accommodated in the accommodating arc-shaped tank 22. As for the three accommodation arc shaped tanks 22, the communication groove 221 is expanded toward one side. The gear base 20 has a storage tank 24 formed between two storage arc-shaped tanks 22. A circuit board 25 connected in signal to the induction coil is installed in the storage tank 24. [Selection] Figure 3

Description

  The present invention relates to a gear structure, and more particularly to a torque gear structure.

  Electric assist bicycles were developed toward automation by assisting riders' driving with propulsion. In this assist bicycle, driving is assisted by supplying different driving force depending on the magnitude of resistance when the user is driving, but the biggest technical problem in development is when the rider pedals It was necessary to judge the resistance based on the magnitude of the applied force. However, in the prior art, there is no system for accurately measuring the resistance force.

  Therefore, a torque sensor gear structure has been developed by a manufacturer in order to improve the conventional problems and disadvantages as described above. The gear structure senses the torque generated when the rider pedals with the sensor unit combined with the gear structure, calculates the resistance force generated when the rider pedals, and the electric drive unit supplies auxiliary power. In addition to reducing the load of force applied by the user, adjusting the power output at any time, and assisting the rider in pedaling in a timely manner, the rider himself can control the output power of the electric drive. This was useful because there was no inconvenience that had to be controlled from time to time.

  However, as can be seen from the above-described conventional structure in detail, there are drawbacks, the main causes of which are as follows.

  The conventional overall structure is complicated, and it is not easy to develop and install the combination member, which is inconvenient for mass production and occurs when the torque gear is pedaled through the first magnet ring and the second magnet ring. The sensor unit is displaced with respect to the first magnet ring and the second magnet ring in order to sense the movement distance between the first magnet ring and the second magnet ring. Two Hall ICs were provided. This makes it possible to measure the distance difference in real time, but because the structure is complex, mutual interference occurs during measurement, increasing the risk of errors and increasing the failure rate, and is already on the market. There was a problem that the applicability of connecting and mounting to the vehicle body was low and not practical.

  Therefore, the first problem of the present invention is that when the rider assists the timely power by the electric drive when the pedal is pedaled, the rider has to save time and effort to control the output power of the electric drive as needed. It is an object of the present invention to provide a torque gear structure that can be adjusted.

  A second problem of the present invention is to provide a torque gear structure that is simple in structure, easy to assemble, low in cost, and highly convenient in mounting structure.

  Therefore, as a result of intensive studies to solve the above-mentioned problems of the present invention, the inventor has found that the elastic member and the control convex portion are between the gear base and the crank for the first problem. In conjunction with contact, the circuit board combination detects the torque change when the pedal is pressed, detects the resistance value generated when the rider steps on the pedal, assists the power by the electric drive, and the Hall IC Focusing on the fact that the problem can be solved by steplessly adjusting the power output of the electric drive device by using a controller, converting the change in torque value by sensing between two induction magnets in real time via Based on this knowledge, the inventors came up with the present invention.

  In addition, with respect to the second problem, focusing on the point that compatibility problems between the structures or signal interference can be prevented by sensitively detecting between the two induction magnets via the Hall IC. Focusing on being able to solve the problem, the present inventors came to the idea of the present invention.

  That is, the first object of the present invention is to detect the torque change when the pedal is depressed by the combination of the circuit board and the elastic member and the braking projection between the gear base and the crank. In addition to calculating the resistance value that occurs when the rider steps on the pedal, assisting the power with the electric drive, reducing the load applied by the rider to apply the pedal, and assisting the rider in a timely manner, Since the change in the torque value is sensed between the two induction magnets in real time via the Hall IC, and the power output of the electric drive unit is adjusted steplessly using the controller, the rider outputs the electric drive unit output. It eliminates the hassle of having to control the power from time to time, prevents the output from becoming too large or too small, and is practical and convenient for practical applications. That is to provide a Torukugia structure.

In addition, the second object of the present invention is that the structure is simple and easy to assemble, and the cost for development and assembly of the structure is effectively saved. The torque gear is connected between the two induction magnets via the Hall IC. Because it can detect in response and prevent inter-structure compatibility problems or signal interference, the failure rate is greatly reduced, the applicability of mounting and using the structure is improved, and the convenience of the mounting structure is high. It is to provide a torque gear structure.
Thus, the gist of the present invention is as follows.

(1) A torque gear structure including an internal fitting cover, a gear base, and a crank,
A through hole for attaching a bottom bracket shell of a bicycle is formed in the central portion of the inner fitting cover, and a plurality of induction coils are provided around the inner fitting cover around the through hole,
The gear base is stacked on the inner cover, a pivot hole is formed in a central portion of the gear base, and three accommodating arc-shaped tanks are recessed on one side with the pivot hole as a center. The accommodating arc-shaped tank accommodates an elastic member, the three accommodating arc-shaped tanks have communication grooves widened toward one side, and the gear base is formed between the two accommodating arc-shaped tanks. A circuit board that is signal-connected to the induction coil is installed in the storage tank, a Hall IC is provided on the circuit board, and the storage tank is provided between the storage hole and the pivot hole. A sensing arc-shaped groove is formed, and a notch groove communicating with the receiving tank and the sensing arc-shaped groove is formed, and the Hall IC protruding into the sensing arc-shaped groove through the notched groove is formed. Arranged,
A lid plate portion combined with the gear base is formed at one end of the crank, a coupling convex shaft is provided at an inner central portion of the lid plate portion, and a communication groove is provided around the coupling convex shaft. A torque gear structure, wherein a plurality of braking convex portions are provided so as to correspond to the two, and two induction magnets are fixed to the lid plate portion.
(2) The torque gear structure according to (1), wherein the induction coil is electrically connected to a controller, and an electric machine driving device is coupled and driven through the controller.
(3) The torque gear structure according to (1), wherein a bearing portion is provided between the coupling convex shaft of the crank and the pivot attachment hole of the gear base.
(4) A pressing sleeve is screwed to the bottom bracket shell through the through hole of the inner fitting cover through a female thread portion formed on the inner diameter of the bottom bracket shell, and the inner fitting cover is fixed to the bottom bracket shell. The torque gear according to (1), wherein the bottom bracket shell is provided with a brake shaft center for mounting the crank, and the brake shaft center projects from the through hole of the inner fitting cover. Construction.
(5) The torque gear according to (4), wherein the coupling convex shaft is formed with a non-circular coupling hole and is interlocked with the crankshaft of the bicycle via the coupling hole. Construction.
(6) A plurality of perforations penetrating the gear base are formed at the bottom of the storage tank,
The circuit board has three signal pins that are in contact with the induction coil of the inner fitting cover through the perforations, as described in (1), (2), or (4) above Torque gear structure.
(7) The torque gear structure according to (1), wherein a plurality of coupling portions for attaching a gear are provided on an outer periphery of the gear base.

  The present invention is configured as described above and, as will be described later, in order to adjust the power output of the electric drive device steplessly, the rider can save time and effort to control the output power of the electric drive device at any time, Output fluctuations can be prevented. In addition, the torque gear can detect and detect compatibility between the two induction magnets via the Hall IC, thereby preventing compatibility problems between the structures or signal interference, and improving mounting applicability. Can do.

FIG. 1 is a perspective view showing a torque gear structure according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing a torque gear structure according to an embodiment of the present invention. FIG. 3 is an exploded perspective view showing a torque gear structure according to an embodiment of the present invention. FIG. 4 is an exploded perspective view showing a gear attached to a torque gear structure according to an embodiment of the present invention. FIG. 5 is a perspective view showing a gear attached to a torque gear structure according to another embodiment of the present invention. FIG. 6 is a combined sectional view showing a torque gear structure according to an embodiment of the present invention. FIG. 7 is an explanatory view showing a torque gear structure when the pedal is pedaled under a normal condition according to an embodiment of the present invention as seen from another angle. FIG. 8 is an explanatory view showing an operating state of torque change of the torque gear structure according to one embodiment of the present invention.

  First, reference will be made to FIGS. As shown in FIGS. 1 to 3, the torque gear structure according to an embodiment of the present invention includes an inner fitting cover 10, a gear base 20, and a crank 30.

  A through hole 11 for attaching the bottom bracket shell 41 of the bicycle 40 is formed in the center portion of the inner cover 10. In the bicycle 40, a pressing sleeve 42 is screwed to the bottom bracket shell 41 through the through hole 11 of the inner fitting cover 10 via a female thread portion formed on the inner diameter of the bottom bracket shell 41, and the inner fitting cover 10 is attached to the bottom bracket shell 41. It is fixed. A crankshaft 43 for attaching the crank 30 is inserted into the bottom bracket shell 41, and the crankshaft 43 protrudes from the through hole 11 of the inner cover 10. In the inner cover 10, a plurality of induction coils 12 are provided around the through hole 11 as a circle. The plurality of induction coils 12 are electrically connected to the controller 13 and are connected to and driven by an electric machine drive device (not shown) via the controller 13.

  The gear base 20 is laminated on the inner cover 10. A pivot attachment hole 21 is formed at the center of the gear base 20, and three accommodating arc-shaped tanks 22 are recessed in one side surface with the pivot attachment hole 21 as the center. An elastic member 23 is accommodated in the accommodating arc-shaped tank 22. The three accommodating arc-shaped tanks 22 have communication grooves 221 that are expanded toward one side. The gear base 20 has a storage tank 24 formed between two storage arc-shaped tanks 22. The storage tank 24 is provided with a circuit board 25 that is signal-connected to the induction coil 12. A plurality of perforations 241 penetrating through the gear base 20 are formed at the bottom of the storage tank 24. The circuit board 25 has three signal pins 251 that come into contact with the induction coil 12 of the inner cover 10 through the perforations 241. A Hall IC 252 is provided on the circuit board 25. A sensing arc-shaped groove 26 is formed between the storage tank 24 and the pivot attachment hole 21, and a notch groove 261 that is communicated is formed between the storage tank 24 and the detection arc-shaped groove 26. A Hall IC 252 that protrudes into the sensing arc-shaped groove 26 is disposed.

  A cover plate portion 31 combined with the gear base 20 is formed at one end portion of the crank 30. A coupling convex shaft 32 is provided in the inner central portion of the lid plate portion 31. A bearing portion 33 is provided between the coupling convex shaft 32 and the pivot attachment hole 21 of the gear base 20. A non-circular coupling hole 321 is formed at the end of the coupling convex shaft 32, and is combined with the crankshaft 43 of the bicycle 40 via the coupling hole 321 and interlocked therewith. Around the coupling convex shaft 32 of the cover plate portion 31, a plurality of braking convex portions 34 are provided so as to correspond to the communication grooves 221, and two induction magnets 35 are fixedly installed at positions adjacent to the coupling convex shaft 32. The The two induction magnets 35 have a sensing interval 351.

  2, 3, 6 and 7, the inner cover 10 is attached to the bottom bracket shell 41 of the bicycle 40 via the pressing sleeve 42 and inserted into the bottom bracket shell 41. The crankshaft 43 protrudes from the through hole 11. The gear base 20 is stacked on the outer side of the inner fitting cover 10, and elastic members 23 are incorporated in the three accommodating arc-shaped tanks 22. A circuit board 25 is attached to the storage tank 24. The Hall IC 252 of the circuit board 25 extends from the notch groove 261 into the sensing arc-shaped groove 26, and the signal pin 251 protrudes from the perforation 241 of the storage tank 24 and comes into contact with the induction coil 12 of the inner cover 10. The crank 30 is brought into contact with the gear base 20 via the lid plate portion 31. The coupling convex shaft 32 at the center of the lid plate portion 31 is incorporated in the pivot attachment hole 21 of the gear base 20. Two bearing portions 33 are provided between the pivot hole 21 and the coupling convex shaft 32, and the coupling hole 321 of the coupling convex shaft 32 and the crankshaft 43 are fitted and interlocked. The braking projections 34 provided around the coupling convex shaft 32 are sequentially inserted into the communication groove 221, and the crank 30 is in a state where the coupling convex shaft 32 is displaced and displaced in the communication groove 221 of the gear base 20. At the same time, it is brought into contact with the elastic member 23, and the crank 30 can be rotated in synchronization with the gear base 20. The two induction magnets 35 of the cover plate portion 31 are smoothly incorporated into the sensing arc-shaped groove 26, and the Hall IC 252 of the circuit board 25 is interposed between the two sensing intervals 351 of the two induction magnets 35, Adjacent to the induction magnet 35. A plurality of coupling portions 27 for attaching the gear 28 are provided on the outer periphery of the gear base 20 (see FIG. 4). The gear 28 is attached between the gear base 20 and the cover plate portion 31 of the crank 30 by an internal fitting method (see FIG. 5), and the torque gear structure is completed.

  Please refer to FIG. 6 and FIG. As shown in FIG. 6 and FIG. 7, when actually riding the bicycle on a flat road or downhill using the torque gear structure of the present invention, the rider's legs are less burdensome and the rider can easily cope with it. In particular, the crank can be driven with a small force without applying a force, and the driving force may be less than that of the elastic member 23 of the gear base 20. At this time, the cover plate portion 31 interlocked by the crank 30 is braked by the elastic member 23. The cover plate portion 31 and the gear base 20 are synchronously rotated by being pressed against the convex portion 34, and the rear wheel is driven by the gear 28 on the outer periphery of the gear base 20 so that the vehicle can run, and the normal driving state is obtained.

  On the other hand, when riding a bicycle for a long distance or climbing uphill, as shown in FIG. 8, the leg 30 in the normal rowing state cannot smoothly crank the crank 30, and the rider must always stand up. However, since it is necessary to turn the crank 30 by applying a large force and the pressure applied to the crank 30 is larger than the elastic coefficient of the elastic member 23, the elastic member 23 is compressed by the braking convex portion 34, and the lid As the plate portion 31 and the gear base 20 are displaced, the two induction magnets 35 of the cover plate portion 31 are displaced and displaced, and the circuit board 25 obtains a magnetic field change signal via the Hall IC 252 and converts it into a torque signal. Using the signal pin 251, a signal is transmitted from the induction coil 12 to the controller 13 to start an electric drive device (not shown), and the electric drive device separately operates. It was obtained, and to assist the operation. The Hall IC 252 also changes the magnetic field as the distance between the two induction magnets 35 changes according to the magnitude of the pedaling force of the rider, and a different torque signal is transmitted to the controller 13 by the circuit board 25. Therefore, it is possible to control the power output from the electric drive device, so that it is compatible with the assist power and the practicality of driving is improved.

As can be seen from the above, the torque gear structure of the present invention has the following advantages (1) and (2).
(1) Between the gear base 20 and the crank 30, the elastic member 23 and the braking projection 34 are brought into contact with each other, and the combination of the circuit board 25 senses a torque change when the pedal is depressed, and the rider In addition to calculating the resistance value generated by the stepping action, assisting the power by the electric drive, reducing the load applied by the rider to apply the pedal, and assisting the rider in a timely manner, the Hall IC 252 Since the change of the torque value is sensed between the two induction magnets 35 in real time via the controller 13 and the power output of the electric drive device is adjusted steplessly using the controller 13, the rider outputs the output power of the electric drive device. This eliminates the hassle of having to control from time to time, prevents the output from becoming too large or too small, and is highly convenient for practical applications. Is a use basis.
(2) The structure is simple and easy to assemble, and the cost for developing and assembling the structure is effectively saved. The torque gear is sensed and detected between the two induction magnets 35 via the Hall IC 252. Since compatibility problems between the structures or signal interference can be prevented, the failure rate can be greatly reduced, the applicability of being attached to the structure can be increased, and the convenience of the structure mounting structure can be improved.

DESCRIPTION OF SYMBOLS 10 Inner cover 11 Through-hole 12 Induction coil 13 Controller 20 Gear base 21 Pivoting hole 22 Accommodating arc-shaped tank 23 Elastic member 24 Accommodating tank 25 Circuit board 26 Sensing arc-shaped groove 27 Coupling part 28 Gear 30 Crank 31 Cover plate part 32 Coupling convex Shaft 33 Bearing 34 Braking convex 35 Inductive magnet 40 Bicycle 41 Bottom bracket shell 42 Pressing sleeve 43 Crankshaft 221 Communication groove 241 Drilling 251 Signal pin 252 Hall IC
261 Notch groove 321 Bonding hole 351 Sensing interval

Claims (7)

A torque gear structure having an inner cover, a gear base and a crank,
A through hole for attaching a bottom bracket shell of a bicycle is formed in the central portion of the inner fitting cover, and a plurality of induction coils are provided around the inner fitting cover around the through hole,
The gear base is stacked on the inner cover, a pivot hole is formed in a central portion of the gear base, and three accommodating arc-shaped tanks are recessed on one side with the pivot hole as a center. The accommodating arc-shaped tank accommodates an elastic member, the three accommodating arc-shaped tanks have communication grooves widened toward one side, and the gear base is formed between the two accommodating arc-shaped tanks. A circuit board that is signal-connected to the induction coil is installed in the storage tank, a Hall IC is provided on the circuit board, and the storage tank is provided between the storage hole and the pivot hole. A sensing arc-shaped groove is formed, and a notch groove communicating with the receiving tank and the sensing arc-shaped groove is formed, and the Hall IC protruding into the sensing arc-shaped groove through the notched groove is formed. Arranged,
A lid plate portion combined with the gear base is formed at one end of the crank, a coupling convex shaft is provided at an inner central portion of the lid plate portion, and a communication groove is provided around the coupling convex shaft. A torque gear structure, wherein a plurality of braking convex portions are provided so as to correspond to the two, and two induction magnets are fixed to the lid plate portion.   The torque gear structure according to claim 1, wherein the induction coil is electrically connected to a controller, and an electric drive device is coupled and driven through the controller.   The torque gear structure according to claim 1, wherein a bearing portion is provided between the coupling convex shaft of the crank and the pivot hole of the gear base.   A pressing sleeve is screwed to the bottom bracket shell through the through hole of the inner fitting cover through a female thread portion formed on the inner diameter of the bottom bracket shell, and the inner fitting cover is fixed to the bottom bracket shell, 2. The torque gear structure according to claim 1, wherein a braking axis for attaching the crank is inserted into the bottom bracket shell, and the braking axis protrudes from the through hole of the inner fitting cover.   5. The torque gear structure according to claim 4, wherein a non-circular coupling hole is formed on the coupling convex shaft, and the coupling convex shaft is interlocked with the crankshaft of the bicycle via the coupling hole. A plurality of perforations penetrating through the gear base are formed at the bottom of the storage tank,
5. The torque gear structure according to claim 1, wherein the circuit board has three signal pins that are brought into contact with the induction coil of the inner cover through the perforations.   The torque gear structure according to claim 1, wherein a plurality of coupling portions for attaching a gear are provided on an outer periphery of the gear base.

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