A drive mechanism for an electric derailleur and an electric derailleur.

Abstract

This utility model discloses a drive device for an electric derailleur, comprising a motor, a power output gear, and a gear transmission assembly located between the motor and the power output gear. The gear transmission assembly includes: a first double gear, which is connected to the motor for driving rotation about a first axis; a second double gear, which meshes with the first double gear for driving rotation about a second axis; and a third double gear, which meshes with the second double gear and the power output gear respectively, and is configured to rotate about the first axis. Compared to the prior art, the drive device of this application has a more compact structure. This application also provides an electric derailleur using the aforementioned drive device.

Description

Technical Field

[0001] This utility model relates to electric derailleur technology for bicycles, specifically, to a drive device for an electric derailleur and an electric derailleur. Background Technology

[0002] Patent application CN108773454B discloses an electromechanical rear derailleur, which includes a base component, a moving component, and a linkage mechanism. The drive unit of this electromechanical rear derailleur includes a motor and a gearbox. The gearbox includes an output gear and three sets of gear assemblies located between the motor and the output gear. The rotation axes of the three sets of gear assemblies are independent of each other. Making the overall structure of the derailleur's drive unit more compact is one of the optimization directions for electric derailleurs. In view of this, this application is hereby filed. Utility Model Content

[0003] The technical problem to be solved by this invention is how to make the drive device for electric derailleurs more compact.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A driving device for an electric derailleur includes a motor, a power output gear, and a gear transmission assembly located between the motor and the power output gear; the gear transmission assembly includes: a first double gear, which is connected to the motor for driving rotation around a first axis; a second double gear, which meshes with the first double gear for driving rotation around a second axis; and a third double gear, which meshes with the second double gear and the power output gear respectively, and is configured to rotate around the first axis.

[0005] Preferably, the first double gear is rotatably mounted on the first shaft support, the third double gear is mounted on the first shaft support and drives the first shaft support to rotate accordingly; the second double gear is mounted on the second shaft support.

[0006] Preferably, the third double gear has at least one gear portion integrally formed with the first shaft support.

[0007] Preferably, the power output gear is sleeved on the third shaft and drives the third shaft to rotate accordingly.

[0008] Preferably, the first axis is arranged parallel to the second axis.

[0009] Preferably, the rotation axis of the power output gear is arranged parallel to the first axis and the second axis.

[0010] Preferably, the motor, power output gear, and gear transmission assembly are mounted on the same mounting base.

[0011] Preferably, a toggle element that can rotate with the third shaft is mounted on the third shaft support.

[0012] This application also provides an electric derailleur, comprising a base and a lever assembly pivotally connected to the base; the base is provided with the aforementioned drive device for the electric derailleur.

[0013] This application also provides an electric derailleur, comprising a base and a lever assembly pivotally connected to the base; the lever assembly is provided with the aforementioned drive device for the electric derailleur.

[0014] Due to the adoption of the above technical solutions, this utility model has the following beneficial effects:

[0015] 1. In the electric derailleur drive device of this application, the first double gear and the third double gear are coaxially arranged and rotate around the first axis. Compared with the prior art design where the rotation axes are independent, the design of this application with a shared rotation axis can save space and improve the structural compactness of the drive device.

[0016] 2. Compared with the existing technology, the first double gear and the third double gear share the first shaft support, which can reduce costs and facilitate the assembly of the drive device;

[0017] 3. The third double gear has at least one gear part integrally formed with the first shaft support, which helps to reduce assembly steps and improve the installation efficiency of the drive device;

[0018] 4. The motor, power output gear, and gear transmission assembly are mounted on the same mounting base, making the overall structure of the drive unit more compact. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0020] Figure 1 and Figure 2 Schematic diagrams of a lever of an embodiment of an electric derailleur are shown from different perspectives;

[0021] Figure 3 A first exploded view of a lever, drive unit, and actuating element of an embodiment of an electric derailleur is shown.

[0022] Figure 4 A second exploded view of an embodiment of an electric derailleur includes a lever, a drive mechanism, and a derailleur component.

[0023] Figure 5A first exploded view of the drive device and actuating element for an electric derailleur according to an embodiment is shown.

[0024] Figure 6 A second exploded view shows a drive device and actuating element for an electric derailleur according to an embodiment;

[0025] Figure 7 A third exploded view shows a drive device and actuating element for an electric derailleur according to an embodiment;

[0026] Figure 8 A schematic diagram of a drive device for an electric derailleur is shown in one embodiment.

[0027] Figure 9 and Figure 10 Schematic diagrams of an embodiment of an electric derailleur are shown from different perspectives;

[0028] Figure 11 An exploded view of an embodiment of an electric derailleur is shown.

[0029] Figure label:

[0030] 1. First connecting rod, 1A. First housing, 1B. Second housing, 2. Actuator, 3. Drive device, 3A. Mounting base, 3B. First double gear, 3C. Second double gear, 3D. Third double gear, 3E. Power output gear, 3F. First shaft support, T1. Second shaft support, T2. Third shaft support, T3. Base, 4. Second connecting rod, 5. Battery, 6. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0032] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0033] Please combine Figures 9 to 11These figures illustrate a partial structure of an electric derailleur, comprising a first link 1, an actuating element 2, a base 4, a second link 5, and a rechargeable battery 6. The first link 1 and the second link 5 form a lever assembly, pivotally connected to the base 4. The rechargeable battery 6 is detachably mounted on the base 4 via a snap-fit ​​structure G, which includes a snap-fit ​​hole G1 on the base 4 and a snap-fit ​​portion G2 on the battery 6. A drive device 3 (described in further detail below) is provided within the first link 1 to drive the actuating element 2. The functions of the lever assembly and the actuating element 2 can be understood by referring to patent applications CN202322046737.4 and CN202310958199.8, etc., and will not be elaborated further. Please refer to further... Figures 1 to 8 The following will further explain the specific cooperation between the drive device 3 and the first connecting rod 1.

[0034] like Figures 1 to 4 As shown, the first linkage 1 includes a first housing 1A and a second housing 1B, which are joined together to form a receiving cavity. The drive device 3 is disposed within the receiving cavity and connected to the derailleur 2. The first housing 1A has a pivot portion 1C for engaging the movable part of the electric derailleur (understood in conjunction with patent applications CN202322046737.4, CN202310958199.8, etc.). The first linkage 1 is also provided with a button Q1 and a circuit component Q2. The circuit component Q2 is electrically connected to the drive device 3. The button Q1 triggers the circuit component Q2 to generate an electrical signal to the drive device 3 to control its operation. A rechargeable battery 6 provides the power required for the operation of the drive device 3.

[0035] like Figures 5 to 8 As shown, the drive device 3 for the electric derailleur of this application includes a mounting base 3A, a motor 3B, a first double gear 3C, a second double gear 3D, a third double gear 3E, a power output gear 3F, a first shaft support T1, a second shaft support T2, and a third shaft support T3, wherein the first double gear 3C, the second double gear 3D, and the third double gear 3E constitute a gear transmission assembly. The motor 3B, the power output gear 3F, and the gear transmission assembly are mounted on the same mounting base 3A. The gear transmission assembly is located between the motor 3B and the power output gear 3F, and is used to drive the power output gear 3F to rotate. The first shaft support T1, the second shaft support T2, and the third shaft support T3 are supported on the mounting base 3A. The power output gear 3F is sleeved on the third shaft support T3 and drives the third shaft support T3 to rotate accordingly. The derailleur 2 is mounted on the third shaft support T3 and can rotate accordingly.

[0036] The first double gear 3C is rotatably mounted on the first shaft support T1, and the first double gear 3C is drively connected to the motor 3B so as to rotate around the first axis L1 under its drive. In this embodiment, the first double gear 3C includes a gear part M11 and a gear part M12, which are engaged along the first axis L1 (they can be engaged by interference fit or integral molding). The gear part M11 meshes with the output shaft of the motor 3B (the two can be a common worm gear meshing structure, which will not be described in detail).

[0037] The second double gear 3D is sleeved on the second shaft support T2. The second double gear 3D meshes with the first double gear 3C, causing it to rotate around the second axis L2. In this embodiment, the second double gear 3D includes gear part M21 and gear part M22, which are engaged along the second axis L2 (they can be engaged by interference fit or integral molding). Gear part M21 and gear part M22 mesh. The first axis L1 is parallel to the second axis L2.

[0038] The third double gear 3E meshes with the second double gear 3D and the power output gear 3F, respectively, and is configured to rotate around the first axis L1. Specifically, the third double gear 3E is sleeved on the first shaft T1 and drives the first shaft T1 to rotate accordingly. The third double gear 3E includes a gear part M31 and a gear part M32, which engage along the first axis L1. Gear part M31 meshes with gear part M22, and gear part M32 meshes with the power output gear 3F. In this embodiment, the gear part M32 of the third double gear 3E is integrally formed with the first shaft T1 (or can be adjusted to an interference fit). In another embodiment, both gear part M31 and gear part M32 can be integrally formed with the first shaft T1. The rotation axis L3 of the power output gear 3F is arranged parallel to the first axis L1 and the second axis L2.

[0039] The above is a specific embodiment of the drive device 3 for an electric derailleur according to one embodiment of this application. However, it should be understood that the embodiments of this application are not limited thereto. Unlike the previous embodiment in which the drive device 3 is mounted on the lever assembly, in another embodiment, the drive device 3 can be disposed on the base 4 of the electric derailleur. The electric derailleur with the drive device 3 disposed on the base 4 can be understood in conjunction with patent application CN108773454B, and will not be described in detail here.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A drive device for an electric derailleur, comprising a motor (3B), a power output gear (3F), and a gear transmission assembly located between the motor (3B) and the power output gear (3F); characterized in that, The gear transmission assembly includes: A first double gear (3C) is connected to the motor (3B) for driving rotation about a first axis (L1); The second double gear (3D) meshes with the first double gear (3C) and is driven by it to rotate around the second axis (L2); The third double gear (3E) meshes with the second double gear (3D) and the power output gear (3F) respectively, and is configured to rotate about the first axis (L1).

2. The electric drive device for a shift device according to claim 1, characterized by The first double gear (3C) is rotatably mounted on the first shaft (T1), the third double gear (3E) is mounted on the first shaft (T1) and drives the first shaft (T1) to rotate accordingly; the second double gear (3D) is mounted on the second shaft (T2).

3. The electric drive device for a shift device according to claim 2, characterized by The third double gear (3E) has at least one gear portion integrally formed with the first shaft support (T1).

4. The electric drive device for a shift device according to claim 1, characterized by The power output gear (3F) is sleeved on the third shaft (T3) and drives the third shaft (T3) to rotate accordingly.

5. The electric drive device for a shift device according to claim 1, characterized by The first axis (L1) is arranged parallel to the second axis (L2).

6. The drive device for an electric derailleur according to claim 5, characterized in that, The rotation axis (L3) of the power output gear (3F) is arranged parallel to the first axis (L1) and the second axis (L2).

7. The electric drive device for a shift device according to claim 1, characterized by The motor (3B), power output gear (3F), and gear transmission assembly are mounted on the same mounting base (3A).

8. The electric drive device for a shift device according to any one of claims 1 to 7, characterized by The third shaft support (T3) is equipped with a toggle (2) that can rotate with it.

9. An electric derailleur comprising a base (4), a swing lever assembly pivoted to said base (4); characterized in that, The base (4) is provided with a drive device (3) for an electric derailleur as described in any one of claims 1 to 7.

10. An electric derailleur comprising a base (4), a swing lever assembly pivoted to said base (4); characterized in that, The lever assembly is equipped with a drive device (3) for an electric derailleur as described in any one of claims 1 to 8.

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