Electronic transmission with angle control function

Abstract

An electronic transmission with an angle control function comprises a base, a connecting rod assembly, a guide wheel assembly and a control assembly. The control assembly comprises an outer box arranged on the first connecting rod part and provided with an accommodating space inside; the output gear is sleeved on a transmission shaft of the connecting rod assembly and is used for driving the transmission shaft to rotate; the motor group is arranged in the accommodating space of the outer box and is used for driving to generate power; the gear set is connected to the motor set and the output gear and used for transmitting the power generated by the motor set to the output gear; the angle sensing unit is arranged in the accommodating space of the outer box, is connected to the transmission shaft and is used for sensing the actual angle change of the transmission shaft; and the processing unit is arranged in the accommodating space of the outer box and is electrically connected with the motor group and the angle sensing unit. According to the utility model, the angle change of the connecting rod assembly can be automatically sensed and corrected so as to reach a desired position point.

Description

TECHNICAL FIELD

[0001] The utility model relates to the speed changer of bicycle, especially point to a kind of electronic speed changer with angle control function. BACKGROUND

[0002] The rear speed changer of bicycle is one of important components in the process of riding, which can adjust the gear ratio by changing the position of chain, helping the rider to maintain the appropriate speed and pedal frequency under different road conditions. With the progress of science and technology and the continuous evolution of bicycle technology, the rear speed changer gradually develops from the traditional mechanical speed changer to the electronic speed changer.

[0003] The traditional mechanical speed changer mainly realizes speed change through mechanical device, and the rider needs to manually operate the speed change handle to adjust the gear ratio. The design of such speed changer is simple, the structure is stable, and the cost is lower, so it is widely used on bicycles. However, due to the need for manual operation, there may be a situation of not timely or not smooth gear shifting during riding, especially in complex road conditions.

[0004] With the development of electronic technology, electronic rear speed changer gradually appears and is widely used. Electronic speed changer realizes automatic speed adjustment through electronic control unit, inductor and electric motor components, provides smoother and more accurate riding experience. In addition to manually operating the speed change handle, the rider can also complete the speed change by pressing the button or through the remote control, greatly improving the convenience and comfort of riding a bicycle.

[0005] Although the electronic rear speed changer brings many advantages, such as automatic speed change, accurate gear ratio adjustment and efficient energy transmission, it still faces some problems, such as whether the angle change of connecting rod group is correct during the process of switching the position of chain. Because during the process of speed changer switching the position of chain, it may be incorrect due to the vibration of the bicycle itself or external impact, resulting in the situation that the chain is not switched to the target position. Therefore, how to provide an electronic speed changer with angle control function that can detect the angle change of connecting rod group is one of the urgent problems to be solved by researchers and developers in the relevant field. SUMMARY

[0006] The main purpose of the utility model is to provide an electronic speed changer with angle control function, which can automatically sense the angle change of connecting rod assembly and correct it to reach the desired position point.

[0007] To achieve the above-mentioned utility model purposes, the utility model provides a kind of electronic transmission with angle control function, including: a pedestal, be equipped in the frame of a bicycle;A connecting rod component, with a first connecting rod part and a second connecting rod part;The first connecting rod part is connected to the pedestal, and one end is equipped with a transmission shaft;The second connecting rod part is pivotally connected with the first connecting rod part, and can be driven by the transmission shaft to move in the direction of approaching or away from the first connecting rod part;A guide wheel component, equipped in the second connecting rod part and synchronously moves with the second connecting rod part;And a control component, equipped in the side of the connecting rod component, including: an outer box, equipped in the first connecting rod part, with a containing space inside;An output gear, is sleeved on the transmission shaft of the connecting rod component, to drive the transmission shaft to rotate;A motor group, equipped in the containing space of the outer box, to drive to generate a power;A gear set, is connected to the motor group and the output gear, to transmit the power generated by the motor group to the output gear;An angle sensing unit, equipped in the containing space of the outer box and connected to the transmission shaft, to sense the actual angle change of the transmission shaft;And a processing unit, equipped in the containing space of the outer box and electrically connected to the motor group and the angle sensing unit;Wherein, the processing unit controls the motor group to act after receiving a predetermined rotation signal transmitted by a control end, so that the power of the motor group is transmitted to the transmission shaft through the gear set and the output gear to make it rotate;When the transmission shaft rotates, the angle sensing unit synchronously senses an actual angle change of the transmission shaft, to generate the actual angle change value and transmit it to the processing unit;The processing unit compares whether the actual angle change value and a predetermined angle change value are same, and if the processing unit judges that the actual angle change value and the predetermined angle change value are different, the processing unit adjusts the action of the motor group until the actual angle change value is equal to the predetermined angle change value.

[0008] In an embodiment, at least a part of the transmission shaft extends into the containing space of the outer box, and the angle sensing unit is connected to one end of the transmission shaft in the containing space.

[0009] In an embodiment, one end of the motor group has a driving shaft and a worm gear sleeved on the driving shaft;The gear set has a first gear, a second gear and a third gear;The first gear is engaged with the worm gear and the second gear respectively;The third gear is engaged with the second gear and the output gear respectively.

[0010] In an embodiment, the first gear has a first large gear and a first small gear coaxially and side by side formed in one piece, the first large gear having a larger outer diameter and a larger number of teeth than the first small gear; the second gear has a second large gear and a second small gear coaxially and side by side formed in one piece, the second large gear having a larger outer diameter and a larger number of teeth than the second small gear; the third gear has a third large gear and a third small gear coaxially and side by side formed in one piece, the third large gear having a larger outer diameter and a larger number of teeth than the third small gear.

[0011] In an embodiment, the worm is engaged with the first large gear; the first small gear is engaged with the second large gear; the second small gear is engaged with the third large gear; the third small gear is engaged with the output gear.

[0012] In an embodiment, the axial direction of the driving shaft of the motor group is substantially perpendicular to the axial direction of the transmission shaft of the linkage assembly.

[0013] In an embodiment, the processing unit further comprises an LED unit electrically connected to the processing unit at one end and exposed from the outer box at the other end, for emitting an alert light when driven by the processing unit.

[0014] In an embodiment, the first linkage portion and the second linkage portion combine to form an X-shaped linkage structure.

[0015] The following is a preferred embodiment of the present application, and is described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a perspective view of a preferred embodiment of the present application.

[0017] Fig. 2 is a schematic view of one perspective of a control assembly of a preferred embodiment of the present application.

[0018] Fig. 3 is a schematic view of another perspective of a control assembly of a preferred embodiment of the present application. DETAILED DESCRIPTION

[0019] The following description with reference to the accompanying drawings is a preferred embodiment of the present application. It should be understood that the drawings and description herein are only for illustration and are not intended to limit the present application. In addition, the words "upper", "lower", "left", "right", "front", "back", "first", "second", and the like described in the specification are used to clearly describe the relative position between elements or mechanisms, and are not used as limiting words.

[0020] Please refer to Figs. 1 to 3The electronic transmission with angle control function is installed on a frame of a bicycle, a plurality of sprockets adjacent to one side of a rear wheel of the bicycle and connected to a chain, for controlling the chain to move between the plurality of sprockets to change the transmission efficiency of the bicycle. The electronic transmission with angle control function mainly comprises a base 10, a connecting rod assembly 20, a guide wheel assembly 30 and a control assembly 40. Among them:

[0021] The base 10 is fixed to the frame of the bicycle. The connecting rod assembly 20 has a first connecting rod part 21 and a second connecting rod part 22. One end of the first connecting rod part 21 is connected to the base 10, and the other end is provided with a transmission shaft 210. The transmission shaft 210 is driven to rotate by external force. The second connecting rod part 22 is pivotally connected to the first connecting rod part 21 in a movable manner. When the transmission shaft 210 rotates, the second connecting rod part 22 can be driven to move towards or away from the first connecting rod part 21. In this embodiment, the first connecting rod part 21 and the second connecting rod part 22 form an X-shaped connecting rod mechanism.

[0022] The guide wheel assembly 30 is movably arranged on the second connecting rod part 22 of the connecting rod assembly 20 and can move synchronously with the second connecting rod part 22. The guide wheel assembly 30 has a first guide wheel 31 and a second guide wheel 32, which are respectively pivotally arranged at opposite ends of the guide wheel assembly 30 and are apart from each other by a predetermined distance, and the first guide wheel 31 is closer to the base than the second guide wheel 32. The first guide wheel 31 and the second guide wheel 32 are used to engage the chain of the bicycle to drive the chain to move relative to the plurality of sprockets.

[0023] The base 10, the connecting rod assembly 20 and the guide wheel assembly 30 described above are conventional rear derailleur structures, which are not the main features of the present application, and their detailed structures are not described here. The innovative technical features of the present application are as follows:

[0024] The control assembly 40 is disposed on one side of the linkage assembly 20 and includes an outer box 41, a processing unit 42, an output gear 43, a motor set 44, a gear set 45, an angle sensing unit 46, and an LED unit 47. The outer box 41 is disposed on the first linkage portion 21 of the linkage assembly 20 and has an accommodating space 410 inside. At least a portion of the transmission shaft 210 of the linkage assembly 20 extends into the outer box 41. The processing unit 42 is disposed in the accommodating space 410 of the outer box 41 and is electrically connected to the motor set 44, the angle sensing unit 46, and the LED unit 47 to control the operation of the above-mentioned elements. In the present embodiment, the processing unit 42 includes a circuit board, a processor disposed on the circuit board, and a power supply. The output gear 43 is disposed in the accommodating space 410 of the outer box 41 and is sleeved on the transmission shaft 210 to be driven to rotate the transmission shaft 210. The motor set 44 is disposed in the accommodating space 410 of the outer box 41. One end of the motor set 44 has a driving shaft 440 and a worm 441 sleeved on the driving shaft 440, and the driving shaft 440 and the worm 441 can synchronously rotate under the control of the motor set 44. The axial direction of the driving shaft 440 is approximately perpendicular to the axial direction of the transmission shaft 210.

[0025] The gear set 45 is disposed in the accommodating space 410 of the outer box 41 and connected to the motor set 44 and the output gear 43, so as to transmit the power generated by the motor set 44 to the output gear 43 to drive the transmission shaft 210 to rotate. The gear set 45 has a first gear 451, a second gear 452 and a third gear 453. The first gear 451 is adjacent to the worm 441 of the motor set 44. The second gear 452 is located between the first gear 451 and the third gear 453. The third gear 453 is adjacent to the output gear 43. Specifically, the first gear 451 has a first large gear 451a and a first small gear 451b coaxially and side by side formed in one piece. The first large gear 451a has a larger outer diameter and more teeth than the first small gear 451b. The second gear 452 has a second large gear 452a and a second small gear 452b coaxially and side by side formed in one piece. The second large gear 452a has a larger outer diameter and more teeth than the second small gear 452b. The third gear 453 has a third large gear 453a and a third small gear 453b coaxially and side by side formed in one piece. The third large gear 453a has a larger outer diameter and more teeth than the third small gear 453b. The worm 441 is engaged with the first large gear 451a. The first small gear 451b is engaged with the second large gear 452a. The second small gear 452b is engaged with the third large gear 453a. The third small gear 453b is engaged with the output gear 43. In this way, the power transmission direction of the power generated by the motor set 44 is in the form of the drive shaft 440-the worm 441-the first gear 451-the second gear 452-the third gear 453-the output gear 43-the transmission shaft 210.

[0026] The angle sensing unit 46 is disposed in the accommodating space 410 of the outer box 41 and connected to one end of the transmission shaft 210 extending into the accommodating space 410, so as to detect the actual angle change of the transmission shaft 210 when the transmission shaft 210 rotates, and generate an actual angle change value transmitted to the processing unit 42.

[0027] The LED unit 47 is electrically connected to the processing unit 42 at one end and exposed from the outer box 41 at the other end. The LED unit 47 is controlled by the processing unit 42 to emit a warning light.

[0028] According to the above structure configuration, when the electronic transmission of the utility model operates, the processing unit 42 receives a predetermined rotation signal transmitted from a control end (including but not limited to a handle, a button, a touch screen and the like arranged on the bicycle), and drives the driving shaft 440 of the motor set 44 to rotate, so as to make the transmission shaft 210 rotate a predetermined angle change value. When the driving shaft 440 rotates, the power transmission direction is in sequence the driving shaft 440, the worm 441, the first gear 451, the second gear 452, the third gear 453 to the output gear 43, and the output gear 43 drives the transmission shaft 210 to rotate synchronously. When the transmission shaft 210 rotates, since the first connecting rod part 21 and the second connecting rod part 22 are pivotally connected with each other, the first connecting rod part 21 and the second connecting rod part 22 are driven to move relatively, so that the guide wheel assembly 30 arranged on the second connecting rod part 22 moves synchronously, thereby driving the chain to move relatively.

[0029] Meanwhile, when the transmission shaft 210 rotates, the angle sensing unit 46 detects the actual rotation angle change of the transmission shaft 210 synchronously according to the rotation of the transmission shaft 210, so as to generate an actual angle change value transmitted to the processing unit 42 for analysis. When the processing unit 42 receives the actual angle change value, it compares the actual angle change value with the predetermined angle change value to determine whether the actual angle change value is equal to the predetermined angle change value. If the processing unit 42 determines that the actual angle change value is different from the predetermined angle change value, the processing unit further adjusts the operation of the motor set 44 until the actual angle change value of the transmission shaft 210 is equal to the predetermined angle change value.

[0030] In summary, the electronic transmission with angle control function provided by the utility model can synchronously sense the actual rotation angle change of the connecting rod assembly through the angle sensing unit and the processing unit of the control assembly when the connecting rod assembly operates, so as to determine whether it rotates to the correct position, and can correct the actual rotation angle change of the connecting rod assembly through the feedback signal of the angle sensing unit when the actual rotation angle change of the connecting rod assembly is incorrect, so as to reach the predetermined position point.

[0031] The above is the preferred embodiment and design drawing of the utility model, which is only used for example and does not limit the right range of the utility model. Any equivalent technical means or right range covered by the content of the claims is within the scope of the utility model and is the right range of the applicant.

Claims

1. An electronic transmission with an angle control function, characterized by, The utility model relates to a bicycle steering control device, comprising: a base arranged on a frame of a bicycle; a linkage assembly having a first linkage part and a second linkage part; the first linkage part is connected to the base and has a transmission shaft at one end; the second linkage part is pivotally connected to the first linkage part and can be driven by the transmission shaft to move in a direction approaching or away from the first linkage part; a guide wheel assembly arranged on the second linkage part and moving synchronously with the second linkage part; and a control assembly arranged on one side of the linkage assembly, comprising: an outer box arranged on the first linkage part and having an accommodation space inside; an output gear arranged on the transmission shaft of the linkage assembly to drive the transmission shaft to rotate; a motor group arranged in the accommodation space of the outer box to generate a driving force; a gear group connected to the motor group and the output gear to transmit the driving force generated by the motor group to the output gear; an angle sensing unit arranged in the accommodation space of the outer box and connected to the transmission shaft to sense an actual angle change of the transmission shaft; and a processing unit arranged in the accommodation space of the outer box and electrically connected to the motor group and the angle sensing unit; wherein the processing unit controls the motor group to act after receiving a predetermined rotation signal transmitted by a control terminal, so that the driving force of the motor group is transmitted to the transmission shaft through the gear group and the output gear to drive the transmission shaft to rotate; when the transmission shaft rotates, the angle sensing unit synchronously senses an actual angle change of the transmission shaft to generate an actual angle change value and transmit it to the processing unit; the processing unit compares the actual angle change value with a predetermined angle change value, and if the processing unit determines that the actual angle change value is different from the predetermined angle change value, the processing unit adjusts the actuation of the motor group until the actual angle change value is equal to the predetermined angle change value. At least a part of the transmission shaft extends into the accommodation space of the outer box, and the angle sensing unit is connected to one end of the transmission shaft located in the accommodation space.

2. The electronically controlled transmission with angular control function according to claim 1, wherein, One end of the motor group has a driving shaft and a worm gear arranged on the driving shaft; the gear group has a first gear, a second gear and a third gear; the first gear is engaged with the worm gear and the second gear respectively; the third gear is engaged with the second gear and the output gear respectively.

3. The electronically controlled transmission with angular control function according to claim 1, wherein, The first gear has a first large gear and a first small gear coaxially and side by side formed in one piece, the outer diameter and the number of teeth of the first large gear are greater than those of the first small gear; the second gear has a second large gear and a second small gear coaxially and side by side formed in one piece, the outer diameter and the number of teeth of the second large gear are greater than those of the second small gear; the third gear has a third large gear and a third small gear coaxially and side by side formed in one piece, the outer diameter and the number of teeth of the third large gear are greater than those of the third small gear.

4. The electronically controlled transmission with angular control function according to claim 3, wherein The worm gear is engaged with the first large gear; the first small gear is engaged with the second large gear; the second small gear is engaged with the third large gear; and the third small gear is engaged with the output gear.

5. The electronically controlled transmission with angular control function according to claim 4, wherein ​ 6. The electronically controlled transmission with angular control function according to claim 3, wherein, An axial direction of the drive shaft of the motor group is substantially perpendicular to an axial direction of the transmission shaft of the linkage assembly.

7. The electronically controlled transmission with angular control function according to claim 1, wherein The LED unit is electrically connected to the processing unit at one end and exposed from the outer box at the other end, and is driven by the processing unit to emit an alert light.

8. The electronically controlled transmission with angular control function according to claim 1, wherein, The first linkage portion and the second linkage portion combine to form an X-shaped linkage structure.

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