Electric derailleur and bicycle

Abstract

The utility model discloses an electric derailleur and a bicycle, the derailleur comprises an electric driving structure, the electric driving structure comprises a motor, a deceleration structure, a swing rotating shaft and an angle detection assembly; the swinging rotating shaft is connected between the speed reducing structure and a connecting rod swinging structure of the electric derailleur; the angle detection assembly comprises a Hall sensor and a magnet, the magnet is directly or indirectly arranged on the swing rotating shaft, and the Hall sensor is arranged on one side of the magnet. The electric derailleur has higher angle detection precision, and can control the derailleur operation more accurately.

Description

TECHNICAL FIELD

[0001] The utility model relates to a chain derailleur and bicycle, concretely relates to an electric chain derailleur and bicycle. BACKGROUND

[0002] The bicycle electronic rear derailleur is used to guide the chain to one of the toothed discs of the rear sprocket, and since each toothed disc of the rear sprocket has different sizes, the bicycle can change gears through the cooperation between the chain and the different toothed discs. For example, the motor unit for a bicycle derailleur disclosed in the application publication No. CN114132425A is provided with an angle sensor (34) and an encoder (40) inside, and the rotation angle of the output shaft of the motor is detected and controlled through the angle sensor (34) and the encoder (40). The electric chain derailleur has the following deficiencies: the angle sensor is arranged in the reduction structure of the motor, which is relatively far from the link swing structure of the electric chain derailleur, and the detection accuracy is not accurate enough, which needs to be improved. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned problems, and provides an electric chain derailleur, which has higher angle detection accuracy and can control the chain shifting operation more accurately.

[0004] Another object of the utility model is to provide a bicycle.

[0005] The object of the utility model is achieved by the following technical solutions:

[0006] An electric chain derailleur comprises an electric driving structure, the electric driving structure comprising a motor, a reduction structure, a swing shaft and an angle detection assembly; the swing shaft is connected between the reduction structure and the link swing structure of the electric chain derailleur; the angle detection assembly comprises a Hall sensor and a magnet, the magnet is directly or indirectly arranged on the swing shaft, and the Hall sensor is arranged on one side of the magnet.

[0007] The working principle of the above-mentioned electric chain derailleur is as follows:

[0008] When working, the motor and the reduction structure drive the swing shaft to rotate, the link swing structure of the electric chain derailleur is swung by the swing shaft, and then the chain guide structure of the electric chain derailleur is driven to complete the chain shifting operation. During this period, the magnet rotates synchronously with the swing shaft, the voltage on the Hall sensor changes, and the angle of rotation of the swing shaft can be obtained by calculating the amplitude or size of the change, and then fed back to the motor, so that more accurate electric chain shifting can be realized.

[0009] One preferred scheme of the utility model, wherein, angle detection assembly at least is equipped with two groups, like this can carry out multiple angle detection simultaneously, take average value again, further improve the detection accuracy of angle.

[0010] One preferred scheme of the utility model, wherein, the swing pivot is equipped with mounting disc, the magnet sets up on the mounting disc.

[0011] Further, the magnet is arranged on the flat end face of the mounting disc.

[0012] Further, the magnet is arranged on the circumferential surface of the mounting disc.

[0013] One preferred scheme of the utility model, wherein, the magnet is arc structure.

[0014] One preferred scheme of the utility model, wherein, still include base, connecting rod swing structure and guide chain structure, the connecting rod swing structure rotationally connects between base and guide chain structure.

[0015] Further, the electric drive assembly further includes a mounting housing fixedly arranged on the base, and the motor and the speed reduction structure are arranged in the mounting housing.

[0016] A bicycle includes the electric derailleur.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The electric derailleur has higher angle detection accuracy and can more accurately control the derailleur operation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a three-dimensional structure schematic view of the electric derailleur of the utility model.

[0020] Fig. 2 It is a three-dimensional structure schematic view of the electric derailleur of the utility model, which hides the mounting housing of the electric drive structure.

[0021] Fig. 3 It is a three-dimensional structure schematic view of the electric derailleur of the utility model, which hides the mounting housing of the electric drive structure. DETAILED DESCRIPTION

[0022] In order to make those skilled in the art well understand the technical scheme of the utility model, the utility model is further described below in combination with embodiments and drawings, but the embodiment of the utility model is not limited to this.

[0023] Example 1

[0024] In combination Figs. 1-3 The bicycle of the embodiment comprises an electric derailleur, which comprises a base 1, an electric driving structure, a connecting rod swing structure 2 and a chain guide structure 3; the electric driving structure comprises a mounting shell 4 and a motor 5, a speed reduction structure 6, a swing pivot 7 and an angle detection assembly arranged in the mounting shell 4, the mounting shell 4 is fixedly arranged on the base 1, the swing pivot 7 is connected between the speed reduction structure 6 and the connecting rod swing structure 2 of the electric derailleur; the angle detection assembly comprises a Hall sensor 8 and a magnet 9, the magnet 9 is directly or indirectly arranged on the swing pivot 7, and the Hall sensor 8 is arranged on one side of the magnet 9.

[0025] Further, the angle detection assembly is provided with at least two groups, so that multiple angle detections can be performed at the same time, and the average value is taken to further improve the detection accuracy of the angle.

[0026] In combination Fig. 3 The swing pivot 7 is provided with a mounting disc 10, and the magnet 9 is arranged on the mounting disc 10.

[0027] Further, the magnet 9 is arranged on a flat end face of the mounting disc 10.

[0028] In combination Fig. 3 The magnet 9 is an arc-shaped structure coaxial with the swing pivot 7.

[0029] In combination Figs. 1-3 The working principle of the electric derailleur of the embodiment is as follows:

[0030] During work, the swing pivot 7 is driven to rotate by the motor 5 and the speed reduction structure 6, the connecting rod swing structure 2 of the electric derailleur is driven to swing by the swing pivot 7, and then the chain guide structure 3 of the electric derailleur is driven to complete the chain shifting operation. During this period, the magnet 9 rotates synchronously with the swing pivot 7, a voltage change occurs on the Hall sensor 8, the angle of rotation of the swing pivot 7 can be obtained by calculating the amplitude or size of the change, and then the angle of rotation is fed back to the motor 5, so that more accurate electric shifting can be realized.

[0031] Embodiment 2

[0032] Different from embodiment 1, the magnet 9 of the embodiment is arranged on the circumferential surface of the mounting disc 10.

[0033] The above is a preferred embodiment of the utility model, but the embodiment of the utility model is not limited by the above content, any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the utility model should be an equivalent replacement method, and all are included in the protection scope of the utility model.

Claims

1. An electric chain tensioner characterized by, The electric drive structure comprises a motor, a speed reduction structure, a swing shaft and an angle detection assembly; the swing shaft is connected between the speed reduction structure and a connecting rod swing structure of the electric derailleur; the angle detection assembly comprises a Hall sensor and a magnet, the magnet is directly or indirectly arranged on the swing shaft, and the Hall sensor is arranged on one side of the magnet.

2. The motorized chain tensioner of claim 1, wherein, The angle detection assembly is provided with at least two groups.

3. The motorized chain tensioner of claim 1, wherein, The swing shaft is provided with a mounting disc, and the magnet is arranged on the mounting disc.

4. The motorized chain tensioner of claim 3, wherein, The magnet is arranged on a flat end face of the mounting disc.

5. The motorized chain tensioner of claim 3, wherein, The magnet is arranged on a circumferential face of the mounting disc.

6. The motorized chain tensioner of claim 1, wherein, The magnet is in an arc structure.

7. The motorized chain tensioner of claim 1, wherein, The electric derailleur further comprises a base, a connecting rod swing structure and a chain guide structure, the connecting rod swing structure is rotationally connected between the base and the chain guide structure.

8. The motorized chain tensioner of claim 7, wherein, The electric drive structure further comprises a mounting housing fixedly arranged on the base, and the motor and the speed reduction structure are arranged in the mounting housing.

9. A bicycle characterized in that, The electric derailleur comprises the electric derailleur according to any one of claims 1-8.

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