Electric power-assisted bicycle gear shifting device based on magnetic reset

Abstract

The utility model discloses an electric power-assisted bicycle gear shifting device based on magnetic force resetting, which comprises a gear shifting outer ring (1) and a gear shifting inner ring (2), the gear shifting outer ring (1) is arranged outside the gear shifting inner ring (2), and the gear shifting inner ring (2) is fixed on a handlebar; and the magnetic reset mechanism is arranged between the gear shifting inner ring (2) and the gear shifting outer ring (1), and the rotated gear shifting outer ring (1) is reset in a non-contact mode through the magnetic reset mechanism. According to the utility model, the non-contact operation of the gear shifting device of the electric power-assisted bicycle is realized by adopting the design of magnetic resetting and the Hall sensor; compared with a traditional key gear shifting device, the magnetic reset design not only prolongs the service life of the device, but also avoids the influence of a humid environment on the service life of a key, meanwhile, a Hall sensor trigger mechanism of the device replaces a traditional spring reset design, the problems of spring rusting and abnormal rotation sound are reduced, and the service life of the device is prolonged. And the gear shifting process is ensured to be stable and noiseless.

Description

Technical Field

[0001] The utility model relates to the field of electric power-assisted bicycles, in particular to a gear shifting device for electric power-assisted bicycles based on magnetic resetting. Background Art

[0002] Electric-assisted bicycles are now widely used in the market, but existing gear shifting systems often suffer from several technical drawbacks. Traditional electric-assisted bicycle gear shifting systems often use a push-button design. While this design is simple to operate, the buttons have a short lifespan and are prone to malfunction or damage in humid environments. Furthermore, existing mechanical gear shifting systems typically rely on springs for reset, but these springs are prone to rusting, resulting in reduced reset performance. Furthermore, over extended use, the rotating springs can produce unusual noises, impacting the user experience.

[0003] Although some improvements have emerged in the market to address these issues, they have not fundamentally resolved the above shortcomings. Therefore, there is an urgent need for a shifting device with a simple structure and high reliability that can overcome the shortcomings of the existing technology and provide better solutions in terms of service life, operating comfort, and environmental adaptability. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an electric power-assisted bicycle shifting device based on magnetic reset, which can effectively solve the deficiencies in the prior art.

[0005] The utility model is realized by the following technical solutions: a gear shifting device for an electric power-assisted bicycle based on magnetic reset, comprising:

[0006] A shift outer ring and a shift inner ring, wherein the shift outer ring is mounted on the outside of the shift inner ring, and the shift inner ring is fixed on the handlebar;

[0007] A magnetic reset mechanism is provided between the shift inner ring and the shift outer ring, and is used to contactlessly reset the shift outer ring after rotation;

[0008] The Hall shift mechanism is arranged inside the shift outer ring and the shift inner ring, and shifting is achieved by rotating the shift outer ring.

[0009] As a preferred technical solution, the magnetic reset mechanism includes a first magnetic block embedded in the outer circular surface of the shift inner ring, and a second magnetic block embedded in the inner circular surface of the shift outer ring, and the first magnetic block and the second magnetic block are relatively non-contacted.

[0010] As a preferred technical solution, the Hall shift mechanism includes a Hall magnet arranged on the inner circumference of the shift outer ring, and a circuit board arranged on the outer circumference of the shift inner ring, and two Hall sensors arranged at intervals are arranged on the circuit board.

[0011] As a preferred technical solution, the Hall sensor includes a first sensor and a second sensor, and the gear shifting is controlled by the reciprocating movement of the Hall magnet between the first sensor and the second sensor.

[0012] As a preferred technical solution, a bearing is installed between the shift outer ring and the shift inner ring.

[0013] As a preferred technical solution, the number of bearings is two, which are respectively arranged on both sides of the shift inner ring.

[0014] The beneficial effects of the utility model are as follows: the utility model realizes contactless operation of the electric power-assisted bicycle shifting device by adopting the design of magnetic reset and Hall sensor; compared with the traditional key shifting device, the magnetic reset design not only prolongs the service life of the device, but also avoids the influence of humid environment on the service life of the key;

[0015] At the same time, the device's Hall sensor trigger mechanism replaces the traditional spring return design, reducing the problems of spring rust and abnormal rotation noise, ensuring a smooth and noise-free shifting process; in addition, the application of rare earth permanent magnets enables the inner and outer rings to automatically reset after rotation, ensuring smoothness and comfort of operation during use. The overall structure is simple, low cost, and has high practicality and reliability, greatly improving the user experience of electric assisted bicycles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the utility model after removing the outer shift ring;

[0020] Description of reference numerals:

[0021] 1. Shift outer ring; 2. Shift inner ring; 4. First magnetic block; 5. Second magnetic block; 7. Hall magnet; 8. Circuit board; 6. First sensor; 9. Second sensor; 3. Bearing. DETAILED DESCRIPTION

[0022] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0023] Any feature disclosed in this specification (including any appended claims, abstract, and drawings), unless otherwise stated, may be replaced by other equivalent or similar features. In other words, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0024] like Figure 1-Figure 3 As shown, the utility model is a shift device for an electric power-assisted bicycle based on magnetic reset, comprising an outer shift ring 1 and an inner shift ring 2, wherein the outer shift ring 1 is mounted on the outside of the inner shift ring 2, and the inner shift ring 2 is fixed on the handlebar;

[0025] It also includes a magnetic reset mechanism, which is arranged between the shift inner ring 2 and the shift outer ring 1, and the shift outer ring 1 is reset in a non-contact manner by the magnetic reset mechanism after rotation;

[0026] It also includes a Hall shift mechanism, which is arranged inside the shift outer ring 1 and the shift inner ring 2. Shifting is achieved by rotating the shift outer ring 1. The Hall control switches the shift, which is simple and convenient.

[0027] Specifically, such as Figure 2 and Figure 3 As shown, the magnetic reset mechanism includes a first magnetic block 4 embedded in the outer circumferential surface of the shift inner ring 2, and a second magnetic block 5 embedded in the inner circumferential surface of the shift outer ring 1. The first magnetic block 4 and the second magnetic block 5 are relatively non-contact arranged. Through the strong magnetic effect of the first magnetic block 4 and the second magnetic block 5, when the shift outer ring 1 rotates, it can be reset by the magnetic blocks.

[0028] Among them, the Hall shift mechanism includes a Hall magnet 7 arranged on the inner circular surface of the shift outer ring 1, and a circuit board 8 arranged on the outer circular surface of the shift inner ring 2. Two Hall sensors with spaced intervals are provided on the circuit board 8. In this embodiment, the Hall sensors include a first sensor 6 and a second sensor 9. The shift is controlled by the reciprocating movement of the Hall magnet 7 between the first sensor 6 and the second sensor 9.

[0029] In order to increase the stability of the shift outer ring 1 when rotating relative to the shift inner ring 2 , in this embodiment, a bearing 3 is installed between the shift outer ring 1 and the shift inner ring 2 .

[0030] The working principle is:

[0031] The contactless shifting operation of the electric-assisted bicycle is realized by combining the magnetic reset mechanism and the Hall shift mechanism;

[0032] Specifically, when the user turns the shift outer ring 1 installed on the handlebar, the shift outer ring 1 triggers the Hall sensor set on the outer circular surface of the shift inner ring 2 through the internal Hall magnet 7, thereby realizing the sending of the shift instruction. The Hall sensor generates a corresponding electrical signal by detecting the position change of the Hall magnet 7, and transmits it to the control circuit board 8 to complete the shift operation.

[0033] In addition, a bearing 3 is installed between the shift outer ring 1 and the shift inner ring 2 to ensure that the shift outer ring 1 rotates smoothly and stably.

[0034] After the shift operation is completed, the magnetic reset mechanism arranged between the shift outer ring 1 and the shift inner ring 2 automatically resets the shift outer ring 1 through magnetic attraction. This non-contact reset method not only improves the service life of the equipment, but also avoids the abnormal noise and rust problems that may occur in traditional spring reset devices.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that do not require creative effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined in the claims.

Claims

1. A gear shifting device for an electric bicycle based on magnetic reset, characterized in that: include: A shift outer ring (1) and a shift inner ring (2), wherein the shift outer ring (1) is mounted on the outside of the shift inner ring (2), and the shift inner ring (2) is fixed on the handlebar; A magnetic reset mechanism is provided between the shift inner ring (2) and the shift outer ring (1), and the shift outer ring (1) is reset in a non-contact manner by the magnetic reset mechanism after rotation; The Hall shift mechanism is arranged inside the shift outer ring (1) and the shift inner ring (2), and shifting is achieved by rotating the shift outer ring (1); the magnetic reset mechanism includes a first magnetic block (4) embedded in the outer circumference of the shift inner ring (2), and a second magnetic block (5) embedded in the inner circumference of the shift outer ring (1), and the first magnetic block (4) and the second magnetic block (5) are arranged in a non-contact manner relative to each other; the Hall shift mechanism includes a Hall magnet (7) arranged on the inner circumference of the shift outer ring (1), and a circuit board (8) arranged on the outer circumference of the shift inner ring (2), and two Hall sensors arranged at intervals are arranged on the circuit board (8).

2. The electric bicycle shifting device based on magnetic reset according to claim 1, characterized in that: The Hall sensor comprises a first sensor (6) and a second sensor (9), and the gear shift is controlled by the Hall magnet (7) moving back and forth between the first sensor (6) and the second sensor (9).

3. The electric bicycle shifting device based on magnetic reset according to claim 1, characterized in that: A bearing (3) is installed between the shift outer ring (1) and the shift inner ring (2).

4. The electric bicycle shifting device based on magnetic reset according to claim 3, characterized in that: The bearings (3) are provided in two numbers, and are respectively provided on both sides of the shift inner ring (2).

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