Electronic speed control and transmission
By limiting the rotation range of the magnet through a two-stage reduction mechanism and combining it with the angle detection by the sensor, the gear identification error of the bicycle electronic gearbox when the main control chip is abnormally reset is solved, thus achieving accurate gear shifting and reliability of the gearbox.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUHAI L-TWOO SPORT TECH CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-07-17
AI Technical Summary
When the main control chip of an existing bicycle electronic gearbox malfunctions and resets abnormally, the magnet rotation angle data is not saved properly, resulting in gear position recognition errors and shifting chaos.
The design employs a two-stage reduction mechanism, limiting the rotation range of the magnet to within 360°. By detecting the rotation angle of the magnet through sensors, the main control chip can accurately identify the gear position simply by recognizing the current angle after an abnormal reset, thus reducing the risk of gear shifting errors.
This improves the accuracy and reliability of gear shifting, reduces the risk of shifting errors, and enhances the reliability of the transmission.
Smart Images
Figure CN224511383U_ABST
Abstract
Claims
1. An electronic speed control device, characterized by, include: Housing (100) for connection to the vehicle frame; The motor (200) is located inside the housing (100); The first reduction mechanism (300) has its input end connected to the output end of the motor (200) in a transmission connection. The output end of the first reduction mechanism (300) extends outside the housing (100) and is used to be connected to the gear shift lever of the transmission body (900) in a transmission connection. The second reduction mechanism (400) has its input end connected to any gear or gear shaft of the first reduction mechanism (300); A sensor and a magnet (600) are provided, the magnet (600) being connected to the output end of a second deceleration mechanism (400), the second deceleration mechanism (400) being used to limit the magnet (600) to rotate within 360°, and the sensor being used to detect the rotation angle of the magnet (600).
2. The electronic speed control device of claim 1, wherein The second reduction mechanism (400) includes a sun gear (410), a ring gear (420), a planet carrier (430), and at least two planetary gears (440) rotatably mounted on the planet carrier (430). The ring gear (420) is connected to the housing (100), the sun gear (410) is connected to the output end of the first reduction mechanism (300), and at least two planetary gears (440) mesh with the sun gear (410) and the ring gear (420). The planet carrier (430) is connected to the magnet (600).
3. The electronic speed control of claim 2 wherein, The planetary carrier (430) includes an annular portion (431) and two clamping portions (432) connected to the end face of the annular portion (431), the two clamping portions (432) being in the shape of clamping the magnet (600).
4. The electronic speed control of claim 3 wherein, The planetary carrier (430) also includes at least two mounting shafts (433) that are both disposed on the annular portion (431). The central axis of the annular portion (431) is parallel to the central axis of all the mounting shafts (433), and the central axis of the annular portion (431) is in the same plane as the central axis of all the mounting shafts (433). The planetary gear (440) is rotatably disposed on the mounting shaft (433).
5. The electronic speed control of claim 2 wherein, It also includes a middle frame (700), which is disposed inside the housing (100) and connected to the housing (100). The motor (200), the gear ring (420) and the first reduction mechanism (300) are all connected to the housing (100) through the middle frame (700).
6. The electronic speed control of claim 1 wherein, The housing (100) includes a base plate (110) and a cover (120) connected to the base plate (110). A housing cavity is formed between the base plate (110) and the cover (120) to house the motor (200), the first reduction mechanism (300), the second reduction mechanism (400), the sensor, and the magnet (600). The base plate (110) is connected to the vehicle frame. The base plate (110) is provided with a mounting hole (111) for the gear shift lever to extend into, so that the output end of the first reduction mechanism (300) is connected to the gear shift lever in a transmission connection.
7. The electronic speed control of claim 6 wherein, An intermediate gear (800) is rotatably provided on the base plate (110). Part of the teeth of the intermediate gear (800) extend into the mounting hole (111). The output end of the first deceleration mechanism (300) is connected to the gear shift lever through the intermediate gear (800).
8. The electronic speed control device of claim 1 or 6 or 7, wherein, The first reduction mechanism (300) includes a first-stage reduction gear set (310), a second-stage reduction gear set (320) and a third-stage reduction gear set (330) connected in sequence. The first-stage reduction gear set (310) is connected to the output end of the motor (200), and the third-stage reduction gear set (330) is connected to the gear shift lever.
9. The electronic speed control device according to claim 1, characterized in that, It also includes a battery and a motherboard (500) disposed in the housing (100), the battery being electrically connected to the motherboard (500), the motherboard (500) being provided with a charging port and the sensor, the housing (100) being provided with a clearance hole in the area corresponding to the charging port, and a plug (121) for sealing the clearance hole being connected to the housing (100).
10. Transmission, characterized in that Includes the electronic speed control device and the transmission body (900) according to any one of claims 1 to 9.