Electric rear derailleur

Abstract

The utility model discloses an electric rear derailleur, which comprises a base component, a rear derailleur and a rear derailleur, the base component can be mounted on a bicycle frame along a mounting axis, the base component comprises a supporting part and a power supply accommodating part positioned above the supporting part, and the mounting axis is arranged above the power supply accommodating part; a movable member to which the chain guide is attached; a link mechanism connecting the movable member with a support portion of the base member through a plurality of pivot shafts and capable of moving the movable member with respect to the base member by operation; the motor module is arranged on the connecting rod mechanism; and a power supply disposed to the power supply accommodation portion of the base member and located above the plurality of pivot shafts, the power supply being electrically connected to the motor module. By adopting the electric rear derailleur provided by the embodiment of the utility model, the power supply can be safely and reliably arranged on the base component.

Description

Technical Field

[0001] This utility model relates to the field of bicycle technology, and in particular to an electric rear derailleur. Background Technology

[0002] Bicycle derailleurs are installed on bicycles and are commonly used to drive the chain, thereby changing the chain from one sprocket to another in a sprocket unit. The technological trend in bicycle derailleurs, including the front and rear derailleurs, is currently shifting towards electric derailleurs.

[0003] For example, patent document CN107792292B discloses an electric bicycle derailleur, which includes a front derailleur unit, a rear derailleur unit, and a derailleur control unit mounted on the bicycle handlebars. In this bicycle derailleur, the power supply is installed inside the seat post of the frame, and a power cable connects the power supply and the derailleurs (including the front and rear derailleurs) to provide power to the drive mechanism in the derailleurs. However, this technology increases the difficulty of product assembly and maintenance, and the power cable installed inside the bicycle is easily damaged when the user adjusts the seat post height later.

[0004] For example, patent document CN104554605B discloses an electric rear derailleur in which the power supply for the electric motor is directly installed on the electric rear derailleur. This technology eliminates the power cable between the power supply and the motor, reduces installation steps, and improves production efficiency. However, because this design places the power supply at the very back of the electric rear derailleur and fixes it with only a latch, with most of the power supply suspended on the electric rear derailleur, the power supply is easily damaged by collisions during vehicle transportation and use, and is also prone to falling off and being lost when driving on bumpy roads. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model provides an electric rear derailleur where the power supply can be reliably installed.

[0006] According to an embodiment of the present utility model, an electric rear derailleur is provided, comprising: a base component, the base component being mountable to a bicycle frame along a mounting axis, the base component including a support portion and a power supply receiving portion located above the support portion, the mounting axis being disposed above the power supply receiving portion;

[0007] A movable component, on which a chain guide is attached;

[0008] A linkage mechanism that connects the movable member to the support portion of the base member via multiple pivots and is operable to move the movable member relative to the base member;

[0009] A motor module, the motor module being arranged on the linkage mechanism; and,

[0010] A power supply is disposed in the power supply housing of the base member and located above the plurality of pivot shafts, and the power supply is electrically connected to the motor module.

[0011] In an optional embodiment, the linkage mechanism includes an outer linkage member and an inner linkage member, and the motor module is fixed to at least one of the inner linkage member and the outer linkage member.

[0012] In an alternative embodiment, the motor module is configured as the inner linkage member.

[0013] In an alternative embodiment, the power supply housing includes a housing cavity and a top cover, wherein the power supply is detachably housed within the housing cavity.

[0014] In an optional embodiment, the support portion of the base member is configured to have a first link connection portion and a second link connection portion; the outer link member includes a first connecting arm near the base member, the first connecting arm extending toward the base member; the motor module has a protrusion connection portion on the side near the base member; wherein, the first connecting arm of the outer link member is connected to the second link connection portion of the base member via a first pivot axis, and the protrusion connection portion is connected to the first link connection portion via a third pivot axis.

[0015] In an optional embodiment, the movable member is configured to have a third link connection and a fourth link connection; the outer link member further includes a second connecting arm away from the base member, the second connecting arm extending toward the movable member; the motor module has an output shaft on the side away from the base member, the output shaft extending vertically from the motor module body; wherein, the second connecting arm of the outer link member is connected to the fourth link connection via a second pivot shaft, and the motor module is pivotally connected to the third link connection via the output shaft.

[0016] In an optional embodiment, the electric rear derailleur further includes a spring having a first rocker arm and a second rocker arm located at both ends. The spring is sleeved on the second pivot shaft and arranged coaxially with the second pivot shaft. The fourth link connection includes an attachment portion at the bottom end, with a first attachment hole on the attachment portion. The second connecting arm has a second attachment hole. The electric rear derailleur further includes a first fixing pin and a second fixing pin. The first fixing pin is fixed to the fourth link connection portion through the first attachment hole on the attachment portion, and the second fixing pin is fixed to the second connecting arm through the second attachment hole on the second connecting arm. The first rocker arm and the second rocker arm of the spring are respectively attached to the first fixing pin and the second fixing pin.

[0017] In an optional embodiment, the mounting axis is defined by the axis of a pivot screw located above the power supply housing side, and the pivot axes defined by the plurality of pivot shafts are arranged substantially perpendicular to the mounting axis in a manner with a deviation of no more than 5 degrees.

[0018] In an alternative embodiment, when the electric motor in the motor module changes the angle of rotation of the output shaft about its axis, the movable member is constrained by the linkage mechanism.

[0019] The electric rear derailleur of this utility model arranges the motor module at the linkage mechanism and arranges the power supply housing above the support of the base component. In this way, the power supply can be reliably and safely housed on the base component, avoiding the problem of collision damage during vehicle transportation and use, and the power supply is not easy to fall off when riding on bumpy roads. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an electric rear derailleur according to an embodiment of the present invention.

[0021] Figure 2 This is an exploded view of an electric rear derailleur according to an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of an electric rear derailleur according to an embodiment of the present invention, viewed from a first angle.

[0023] Figure 4 This is a schematic diagram of an electric rear derailleur according to an embodiment of the present invention, viewed from a second angle.

[0024] Figure 5 It shows Figure 2 The diagram shows a three-dimensional assembly of the external linkage component, motor module, and movable component in the electric rear derailleur.

[0025] Figure 6 It shows Figure 2The diagram shows a three-dimensional assembly of the outer linkage component, movable component, and base component in the electric rear derailleur.

[0026] Figure 7 This is an exemplary bottom view of an electric rear derailleur according to an embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of an electric rear derailleur according to an embodiment of the present invention, viewed from a third angle.

[0028] Figure label:

[0029] 10-Electric rear derailleur; 12-Base component; 121-Support part; 122-Power supply housing part; 123-Side plate; 124-Top cover; 125-Top cover shaft; 126-Fixing screw; 127-First link connection part; 127a-First upper link connection part, 127b-First lower link connection part 127b; 128-Second link connection part; 129-Shaft screw; 134-First limiting member; 136-Second limiting member;

[0030] 14-Modible component; 142-Third link connection; 142a-Upper lug connection; 142b-Lower lug connection; 143-First connecting through hole; 145-Second connecting through hole; 146-Fourth link connection; 147-Attachment part; 148-First attachment hole;

[0031] 16-Linkage mechanism; 162-Outer link member; 164-First connecting arm; 164a-First upper connecting arm; 164b-First lower connecting arm; 165-First link through hole; 166-Second connecting arm; 166a-Second upper connecting arm; 166b-Second lower connecting arm; 167-Second attachment hole; 168-Second link through hole;

[0032] 18-Chain guide; 20-Power supply; 32-First pivot; 34-Second pivot; 35-Spring; 36-Third pivot; 38-First retaining pin; 39-Second retaining pin;

[0033] 40 - Motor module; 42 - Protrusion connector; 44 - Output shaft; 50 - Wire. Detailed Implementation

[0034] The technical solutions of the embodiments will now be clearly and completely described with reference to the accompanying drawings of this application. Those skilled in the art will understand that the embodiments described in the specification are only a part of the embodiments of this utility model invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort are within the scope of protection of this utility model.

[0035] In the description of this patent specification, terms such as "upper," "lower," "front," "back," "left," "right," "top," "bottom," "inner," "outer," "longitudinal," "transverse," "center," "vertical," "horizontal," "length," "width," "thickness," "clockwise," and "counterclockwise" indicate directions or positional relationships, as follows: Figure 1 The bicycle electric rear derailleur shown is a reference. These orientations and positional relationships are merely for the purpose of describing the embodiments involved in the technical innovation of this utility model and should not be construed as limiting the scope of protection of the claims. Furthermore, those skilled in the art will understand that the terms "first" and "second" used in this specification to describe various components are only for distinguishing one component from another and have no sequential meaning; the corresponding components should not be limited by these terms.

[0036] In this invention, the bicycle can be any type of bicycle, such as a mountain bike, a road bike, etc. Figure 1 This is a schematic diagram of an electric rear derailleur according to an embodiment of the present invention. Figure 2 This is an exploded view of an electric rear derailleur according to an embodiment of the present invention. Figure 1 and 2 As shown, the electric rear derailleur 10 of this embodiment includes a base member 12 and a movable member 14 movably connected to the base member 12. The electric rear derailleur 10 also includes a linkage mechanism 16, which connects the movable member 14 to the base member 12 via a plurality of pivots. By operating the linkage mechanism 16, the movable member 14 can be moved relative to the base member 12.

[0037] Figure 4 This is a schematic diagram of an electric rear derailleur according to an embodiment of the present invention, viewed from a second angle. Figure 5 It shows Figure 2 The diagram shows a three-dimensional assembly of the outer linkage, motor module, and movable components in the electric rear derailleur. Figure 1 , 4 As shown in Figure 5, the base member 12 includes a support portion 121 and a power supply receiving portion 122 located above the support portion 121. The support portion 121 is configured to have a first link connection portion 127 and a second link connection portion 128. The electric rear derailleur of this embodiment of the invention also includes a first limiting member 134 and a second limiting member 136 mounted on the base member 12, the first limiting member 134 and the second limiting member 136 for limiting the travel distance of the chain.

[0038] In this embodiment of the invention, the power supply housing 122 is configured to have a housing cavity, a side plate 123, and a top cover 124. For example... Figure 1 , 3As shown in Figure 4, during assembly, the side plate 123 is fixed to the power supply housing 122 by a plurality of fixing screws 126 (e.g., four). The upper cover shaft 125 passes through a through hole on one side of the upper cover 124 to install the upper cover 124 to the power supply housing 122, thereby allowing the upper cover 124 to rotate around the upper cover shaft 125 to open and close. The electric rear derailleur 10 includes a power supply 20, which can be placed within the housing cavity of the power supply housing 122. Because the power supply housing 122 is equipped with an openable and closable upper cover 124, the user can easily replace the power supply 20 by opening the upper cover 124, making operation simple and convenient.

[0039] In this embodiment of the invention, the electric rear derailleur also includes a pivot screw 129, which is configured to pass through a mounting through hole on the body of the base member 12. In one embodiment, the mounting through hole is located above the side of the power supply housing 122. Figure 3 This is a schematic diagram of an electric rear derailleur according to an embodiment of the present invention, viewed from a first angle. Figure 3 As shown, the base component 12 can be mounted to the bicycle frame along the mounting axis A-A' using the pivot screw 129.

[0040] The linkage mechanism 16 includes an outer linkage member and an inner linkage member. In one embodiment of the invention, as... Figure 1 and Figure 2 As shown, the outer linkage member is outer linkage member 162. The electric rear derailleur includes multiple pivots, such as a first pivot 32, a second pivot 34, and a third pivot 36. The electric rear derailleur 10 also includes a chain guide 18, which is pivotally connected to a movable member 14 in a conventional manner. When the electric rear derailleur 10 is mounted to the bicycle frame, the output shaft of the electric motor is rotatably connected to the movable member 14. The movable member 14 is constrained by the linkage mechanism as the electric motor changes the angle of rotation of the output shaft about its axis, thereby enabling the movable member 14 to move the chain guide 18 in a lateral direction relative to the base member 12, thus allowing the bicycle chain to be moved from one sprocket to another in the sprocket. Figure 3 As shown, the pivot axis defines the pivot axis in the B-B' direction. The pivot axis is arranged approximately perpendicular to the mounting axis with a deviation of about 5 degrees.

[0041] like Figure 2As shown, the outer connecting rod member 162 includes a first end and a second end opposite to the first end. The outer connecting rod member 162 is configured to have a first connecting arm 164 formed at the first end and a second connecting arm 166 formed at the second end. The first connecting arm 164 includes a first upper connecting arm 164a and a first lower connecting arm 164b, which are configured to be spaced apart by a first distance. The second connecting arm 166 includes a second upper connecting arm 166a and a second lower connecting arm 166b, which are configured to be spaced apart by a second distance.

[0042] In this embodiment of the invention, the first connecting rod connection portion 127 of the support portion 121 is an inner connecting rod connection portion, and the second connecting rod connection portion 128 is an outer connecting rod connection portion. For example... Figure 1 and 2 As shown, after the electric rear derailleur 10 is assembled, the second link connection portion 128 is arranged between the first upper connecting arm 164a and the first lower connecting arm 164b of the outer link member 162. The second link connection portion 128 is provided with a through hole for the first pivot shaft 32 to pass through. The ends of the first upper connecting arm 164a and the first lower connecting arm 164b are respectively provided with symmetrical first link through holes 165 for the first pivot shaft 32 to pass through. During assembly, the first pivot shaft 32 can pass through the through holes of the first lower connecting arm 164b of the outer link member 162, the second link connection portion 128 of the base member 12, and the first upper connecting arm 164a of the outer link member 162 from bottom to top, thereby pivotally connecting the outer link member 162 and the base member 12.

[0043] Figure 6 It shows Figure 2 The diagram shows a three-dimensional assembly of the outer linkage component, movable component, and base component in the electric rear derailleur. Figure 7 This is an exemplary bottom view of an electric rear derailleur according to an embodiment of the present invention. Figure 8 This is a schematic diagram of an electric rear derailleur according to an embodiment of the present invention, viewed from a third angle. Figure 2 , 4 As shown in Figure 8, the movable member 14 includes a third link connection portion 142 and a fourth link connection portion 146. The third link connection portion 142 is an inner link connection portion, and the fourth link connection portion 146 is an outer link connection portion. The fourth link connection portion 146 is configured to be disposed between the second upper connecting arm 166a and the second lower connecting arm 166b of the outer link member 162. The fourth link connection portion 146 has a second connecting through hole 145 through which the second pivot shaft 34 passes.

[0044] The ends of the second upper connecting arm 166a and the second lower connecting arm 166b are respectively provided with symmetrical second link through holes 168 for the second pivot shaft 34 to pass through. The electric rear derailleur 10 also includes a cylindrical helical spring 35. In an optional embodiment, a spring receiving portion is provided in the fourth link connecting portion 146, and the spring 35 can be placed in the spring receiving portion. Figure 2 and Figure 6 As shown, the fourth link connecting part 146 is a hollow cylindrical structure, and the part facing away from the outer link member 162 has an open opening for the spring 35 to be placed inside the fourth link connecting part 146. During assembly, the second link through hole 168 on the second upper connecting arm 166a and the second lower connecting arm 166b is aligned with the second connection through hole 145 on the fourth link connecting part 146. The spring 35, the third link through hole 168, and the second pivot shaft 34 are arranged coaxially. The second pivot shaft 34 passes through the second link through hole 168 of the second lower connecting arm 166b, the second connection through hole 145 of the fourth link connecting part 146, the coil spring 35, and the second link through hole 168 of the second upper connecting arm 166a from bottom to top, thereby pivotally connecting the outer link member 162 to the movable member 14.

[0045] Spring 35 is configured to have a first rocker arm and a second rocker arm, which are formed at both ends of the helical spring. For example... Figure 6 As shown, the bottom of the fourth link connecting portion 146 also forms an attachment portion 147, and the attachment portion is provided with a first attachment hole 148. During assembly, the first fixing pin 38 is fixed to the fourth link connecting portion 146 through the first attachment hole 148. In an optional embodiment of the present invention, the first attachment hole 148 is a hole that does not penetrate through the bottom. The first rocker arm of the spring 35 is arranged to be pressed by the first fixing pin 38. The second connecting arm 166 is also provided with a second attachment hole 167. For example, the second attachment hole can be provided on the second upper connecting arm 166a and the second lower connecting arm 166b respectively, and during assembly, the second fixing pin 39 is fixed between the second upper connecting arm 166a and the second lower connecting arm 166b through the second attachment hole 167. In an optional embodiment of the present invention, the second attachment hole 167 is a hole that does not penetrate through the bottom. To better understand the technical solution of the electric rear derailleur of the present invention, Figure 7-8 The positions of the first attachment hole 148 and the second attachment hole 167 are shown at the bottom. Those skilled in the art will understand that this is merely illustrative and does not indicate that these two attachment holes are through holes. The second rocker arm of the helical spring 35 is arranged to be pressed down by the second retaining pin 39. The transmission of elastic force is achieved because the two rocker arms of the spring interfere with the first retaining pin 38 and the second retaining pin pivot 39, respectively.

[0046] like Figure 2As shown, the electric rear derailleur 10 also includes a motor module 40 fixed to the linkage mechanism 16. The motor module 40 drives the linkage mechanism 16 and the movable member 14, and thus drives the chain guide 18. The motor module 40 includes a first end and a second end opposite to the first end. The first end of the motor module 40 is provided with a protrusion connection portion 42, which has a through hole extending vertically so that a third pivot shaft 36 can pass through the through hole. In one embodiment, the protrusion connection portion 42 is configured to have at least a partially arcuate side surface.

[0047] like Figure 4 As shown, the first link connecting portion 127 of the base member 12 has a recessed portion in the middle to accommodate the protrusion connecting portion 42. The first link connecting portion 127 includes a first upper link connecting portion 127a located above the recessed portion and a first lower link connecting portion 127b located below the recessed portion. During assembly, the third pivot shaft 36 can pass through the through holes of the first link connecting portion 125b, the protrusion connecting portion 42, and the second link connecting portion 125a sequentially from bottom to top, thereby pivotally connecting the motor module 40 to the base member 12. That is, the third pivot shaft 36 can rotate or be pulled out within the through hole of the protrusion connecting portion 42.

[0048] The second end of the motor module 40 is provided with an output shaft 44 extending vertically from the motor module body. The output shaft 44 is arranged parallel to the third pivot shaft 36, the second pivot shaft 34, and the first pivot shaft 32. The third link connection 142 of the movable member is configured with an upper lug connection 142a and a lower lug connection 142b, wherein the two lug connections are arranged coaxially and are spaced apart by a certain distance. During assembly, both ends of the output shaft 44 pass through the through holes on the upper lug connection 142a and the lower lug connection 142b of the movable member 14, thereby pivotally connecting the motor module 40 and the movable member 14. When the electric motor changes the angle of rotation of the output shaft 44 about its axis, the movable member 14 is constrained by the linkage mechanism. The internal structure of the motor module 40 is conventional prior art and will not be described in detail here. The electric rear derailleur 10 also includes a wire 50, one end of which is electrically connected to the power supply 20, and the other end is electrically connected to the electric motor of the motor module 40.

[0049] This application specification describes, with reference to the accompanying drawings, an embodiment in which the motor module simultaneously functions as an inner link member of a linkage mechanism. Those skilled in the art will understand that, in other embodiments of this invention, the linkage mechanism may further include an outer link member and an inner link member, which connect a movable member to a support portion of a base member via multiple pivot axes. The motor module is disposed at at least one of the outer and inner link members. For example, the motor module is fixed to the body of the inner link member, which is pivotally connected to both the base member and the movable member via pivot axes.

[0050] The electric rear derailleur of this invention can ensure that the power module is securely and reliably fixed to the electric rear derailleur, especially to the base component.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric rear derailleur, characterized in that, include: A base component that can be mounted to a bicycle frame along a mounting axis, the base component including a support portion and a power supply receiving portion located above the support portion, the mounting axis being disposed above the power supply receiving portion; A movable component, on which a chain guide is attached; A linkage mechanism that connects the movable member to the support portion of the base member via multiple pivots and is operable to move the movable member relative to the base member; A motor module, the motor module being arranged on the linkage mechanism; and, A power supply is disposed in the power supply housing of the base member and located above the plurality of pivot shafts, and the power supply is electrically connected to the motor module.

2. The electric rear derailleur according to claim 1, characterized in that, The linkage mechanism includes an outer linkage component and an inner linkage component, and the motor module is fixed to at least one of the inner linkage component and the outer linkage component.

3. The electric rear derailleur according to claim 2, characterized in that, The motor module is configured as the inner connecting rod component.

4. The electric rear derailleur according to claim 1, characterized in that, The power supply housing includes a housing cavity and a top cover, and the power supply is detachably installed in the housing cavity.

5. The electric rear derailleur according to claim 3, characterized in that, The support portion of the base component is configured to have a first link connection portion and a second link connection portion; the outer link component includes a first connecting arm near the base component, the first connecting arm extending toward the base component; the motor module has a protrusion connection portion on the side near the base component; wherein, the first connecting arm of the outer link component is connected to the second link connection portion of the base component via a first pivot axis, and the protrusion connection portion is connected to the first link connection portion via a third pivot axis.

6. The electric rear derailleur according to claim 5, characterized in that, The movable member is configured to have a third link connection and a fourth link connection; the outer link member further includes a second connecting arm away from the base member, the second connecting arm extending toward the movable member; the motor module has an output shaft on the side away from the base member, the output shaft extending vertically from the motor module body; wherein, the second connecting arm of the outer link member is connected to the fourth link connection via a second pivot shaft, and the motor module is pivotally connected to the third link connection via the output shaft.

7. The electric rear derailleur according to claim 6, characterized in that, The electric rear derailleur also includes a spring having a first rocker arm and a second rocker arm located at both ends, the spring being sleeved on the second pivot and arranged coaxially with the second pivot. The fourth link connection includes an attachment portion disposed at the bottom end, and the attachment portion is provided with a first attachment hole; The second connecting arm is provided with a second attachment hole; The electric rear derailleur also includes a first fixing pin and a second fixing pin. The first fixing pin is fixed to the fourth link connecting part through a first attachment hole on the attachment part, and the second fixing pin is fixed to the second connecting arm through a second attachment hole on the second connecting arm. The first rocker arm and the second rocker arm of the spring are respectively attached to the first fixing pin and the second fixing pin.

8. The electric rear derailleur according to claim 7, characterized in that, The fourth link connection is provided with a spring receiving part, and the spring is arranged in the spring receiving part. The second pivot shaft passes through the through hole of the second connecting arm, the through hole of the fourth link connection, and the spring.

9. The electric rear derailleur according to claim 1, characterized in that, The mounting axis is defined by the axis of the pivot screw located above the power supply housing side, and the pivot axes defined by the plurality of pivot axes are arranged substantially perpendicular to the mounting axis in a manner with a deviation of no more than 5 degrees.

10. The electric rear derailleur according to claim 6, characterized in that, When the electric motor in the motor module changes the angle of rotation of the output shaft about its axis, the movable member is constrained by the linkage mechanism.

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