CN114906264B

CN114906264B - Electronic derailleur and variable speed bicycle

Info

Publication number: CN114906264B
Application number: CN202210508355.6A
Authority: CN
Inventors: 刘春生; 周慧锋
Original assignee: Zhuhai Blueprint Sports Technology Co ltd
Current assignee: Zhuhai Blueprint Sports Technology Co ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2023-05-26
Anticipated expiration: 2042-05-10
Also published as: WO2023216442A1; CN114906264A

Abstract

The embodiment of the invention discloses an electronic derailleur and a speed-changing bicycle, wherein the electronic derailleur comprises a base component, a P joint component, a chain guide component, an electric driving piece and a power supply, and the hinged quadrilateral component comprises an inner connecting rod and an outer connecting rod; the driving axis of the electric driving piece coincides with the target diagonal of the hinged quadrangle and is used for changing the length of the target diagonal so as to deform the hinged quadrangle; the power supply is positioned in the movable space between the inner connecting rod and the outer connecting rod, and is electrically connected with the electric driving piece. The embodiment of the invention can shorten the distance between the power supply and the electric driving part, so that the power supply wire can be connected with the power supply in the shortest connection mode, the problem of complex wiring is avoided, and the structural compactness of the electronic derailleur is improved.

Description

Electronic derailleur and variable speed bicycle

Technical Field

The invention relates to the field of bicycle speed changing devices, in particular to an electronic derailleur and a speed changing bicycle.

Background

With the development of the bicycle industry, the bicycle speed changing system derives an electronic speed changing system based on the traditional mechanical speed changing system, and with the gradual maturity of the technology of the electronic speed changing system, the electronic speed changing system is touted in recent years.

The battery of electronic derailleurs in the market today is commonly mounted on a base member, or on an inner and outer link, or elsewhere on the bicycle frame.

The above-mentioned prior art is based on the installation position of the battery, resulting in a longer power cord for connecting the battery and the motor of the electronic derailleur, and requires an additional binding of the power cord to the frame of the bicycle by means of a tie (binding band), that is, the existing electronic derailleur has a complicated wiring condition, resulting in an insufficient structural compactness of the electronic derailleur.

Disclosure of Invention

The invention aims to provide an electronic derailleur and a speed-changing bicycle, which aim to solve the problem that the existing electronic derailleur is complex in wiring.

In order to solve the technical problems, the aim of the invention is realized by the following technical scheme: provided is an electronic derailleur comprising:

a base member for connection with a frame of a bicycle;

a P-joint member connected with the base member by an articulated quadrilateral member;

a chain guide member, the P-joint member being rotatably provided at one end of the chain guide member;

the articulated quadrilateral member includes:

the two ends of the inner connecting rod are respectively and rotatably arranged on the base component and the P joint component;

the two ends of the outer connecting rod are respectively and rotatably arranged on the base component and the P joint component, and the outer connecting rod is arranged opposite to the inner connecting rod in the hinged quadrangle;

further comprises:

an electric drive having a drive axis coincident with a target diagonal of the articulated quadrilateral for varying the target diagonal length to deform the articulated quadrilateral;

the power supply is positioned in the movable space between the inner connecting rod and the outer connecting rod and is electrically connected with the electric driving piece.

Further, the electric driving piece is connected with the articulated quadrilateral member through a mounting seat, and the power supply is mounted on one side of the mounting seat, wherein the electric driving piece comprises:

the motor is arranged on the other side of the mounting seat;

the control board is arranged on one side of the mounting seat and is electrically connected with the power supply and the motor respectively;

and the mounting piece is connected with the output shaft of the motor and is used for sliding back and forth along the driving axis when the output shaft of the motor rotates so as to change the length of the target diagonal line.

Further, the mount pad includes:

a base part, wherein the extension axis of the base part is overlapped with the driving axis, and a yielding groove for embedding the control board is formed in one side of the base part;

the bearing part is fixedly arranged at one end of the other side of the base part and is provided with a bearing hole for embedding the tail end of the motor;

the 2 clamping parts are oppositely arranged, the 2 clamping parts are fixedly arranged at the other end of the other side of the base part, and clamping holes for embedding the front end of the motor are formed between the 2 clamping parts;

the locking part is connected with the 2 clamping parts and is used for connecting the 2 clamping parts after the front end of the motor is embedded into the clamping hole so as to clamp the motor.

Further, the power supply includes:

the battery body is electrically connected with the control panel;

the battery shell is buckled on one side of the mounting seat and is provided with an accommodating cavity for accommodating the battery body.

Further, the battery shell is detachably connected to the mounting seat through a connecting piece.

Further, one end of the battery shell is provided with a first bulge, and the other end of the battery shell is provided with a second bulge;

the connector includes:

the limiting block is fixedly arranged at one end of the mounting seat and is provided with a matching hole for embedding the first bulge;

the buckle is rotationally arranged at the other end of the mounting seat and can be connected with the second bulge so as to fasten the battery shell to the mounting seat.

Further, the battery case other end is provided with and supplies the groove of dodging of buckle embedding, the buckle includes:

the rotating part is rotationally connected in the avoiding groove;

the connecting part is fixedly arranged at the tail end of the rotating part;

the buckling part is fixedly arranged between the rotating part and the connecting part and is used for abutting against the second protrusion.

Further, the second protrusion is provided with a buckling surface inclined towards the battery shell and facing downwards, and the buckling part is provided with a pressing surface matched with the buckling surface.

Further, the inner connecting rod and the outer connecting rod are brackets, each bracket comprises a connecting part and 2 wing parts respectively fixedly arranged at the opposite ends of the connecting part, and each wing part is rotationally connected with the corresponding position of the base component or the P joint component through corresponding pin elements;

the movable space is located between 2 brackets, the mounting seat is fixedly arranged at the tail end of the first pin element, and the mounting piece is fixedly arranged at the tail end of the third pin element.

The embodiment of the invention also provides a speed-changing bicycle, wherein: comprising an electronic derailleur as described above and a bicycle body to which the electronic derailleur is mounted.

The embodiment of the invention provides an electronic derailleur and a variable speed bicycle, wherein: the electronic derailleur includes a base member for connection with a frame of a bicycle, a P-joint member, a chain guide member, an electric drive and a power source; the P joint component is connected with the base component through a hinged quadrilateral component; the P joint component is rotatably arranged at one end of the chain guide component; the hinged quadrilateral component comprises an inner connecting rod and an outer connecting rod, and two ends of the inner connecting rod are respectively and rotatably arranged on the base component and the P joint component; the two ends of the outer connecting rod are respectively and rotatably arranged on the base component and the P joint component, wherein the outer connecting rod is arranged opposite to the inner connecting rod in the hinged quadrangle; the driving axis of the electric driving piece coincides with a target diagonal line of the hinged quadrangle and is used for changing the length of the target diagonal line so as to deform the hinged quadrangle; the power supply is positioned in the movable space between the inner connecting rod and the outer connecting rod, and is electrically connected with the electric driving piece.

The embodiment of the invention can shorten the distance between the power supply and the electric driving part, so that the power supply wire can be connected with the power supply in the shortest connection mode, the problem of complex wiring is avoided, and the structural compactness of the electronic derailleur is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an electronic derailleur according to an embodiment of the present invention at a first angle;

FIG. 2 is a schematic diagram of an electronic derailleur according to an embodiment of the present invention at a second angle;

FIG. 3 is a schematic view of a hinged quadrilateral in an electronic derailleur according to an embodiment of the present invention;

FIG. 4 is an exploded view of a partial construction of an electronic derailleur provided in accordance with an embodiment of the present invention;

FIG. 5 is a schematic diagram of a mounting base in an electronic derailleur according to an embodiment of the present invention;

FIG. 6 is a schematic view of a P-joint member of an electronic derailleur according to an embodiment of the present invention;

FIG. 7 is a schematic view of the structure of the inner and outer links of the electronic derailleur provided in an embodiment of the present invention;

FIG. 8 is a partial cross-sectional view of a connecting member of an electronic derailleur in accordance with an embodiment of the present invention.

The figure identifies the description:

1. a base member; 2. a P joint member; 21. a P joint seat; 22. a P joint body; 23. a main shaft; 24. a return spring; 3. a chain guide member; 4. an inner link; 41. an outer link; 42. a movable space; 43. a mounting base; 431. a base portion; 432. a carrying part; 433. a clamping part; 434. a locking part; 435. a relief groove; 436. a bearing hole; 437. a clamping hole; 44. an electric drive; 441. a motor; 442. a control board; 443. a mounting member; 45. a connecting piece; 451. a limiting block; 452. a buckle; 453. a mating hole; 5. a power supply; 51. a battery body; 52. a battery case; 53. an avoidance groove; 6. a first protrusion; 61. a second protrusion; 62. a buckling surface; 7. a rotating part; 71. a joint portion; 72. a buckling part; 73. pressing the surface; 8. a first side; 81. a second side; 9. an external threaded rod; 91. an internal threaded rod; 92. a limiting piece; 93. a limiting surface; 94. a limit seat; 95. a limit rod; 951. a threaded portion; 952. a boss; 953. a compression spring; 954. a clamping groove; 96. a limiting hole; 97. an abutment surface; 98. a torsion spring; 100. a first connection portion; 200. a second connecting portion; 101. a first wing; 102. a second wing; 201. a third wing; 202. a fourth wing; 301. a first pin member; 302. a second pin member; 303. a third pin member; 304. a fourth pin member; a. a diagonal line; b. and a diagonal line.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Referring to FIGS. 1 through 8, an embodiment of the present invention provides an electronic derailleur including:

a base member 1, said base member 1 for connection with a frame of a bicycle;

a P-joint member 2, the P-joint member 2 being connected with the base member 1 by a hinge quadrilateral member;

a chain guide member 3, wherein the P joint member 2 is rotatably provided at one end of the chain guide member 3;

the articulated quadrilateral member includes:

an inner link 4, wherein both ends of the inner link 4 are rotatably provided to the base member 1 and the P-joint member 2, respectively;

an outer link 41, both ends of the outer link 41 being rotatably provided to the base member 1 and the P joint member 2, respectively, wherein the outer link 41 is provided opposite to the inner link 4 in a hinge quadrilateral;

further comprises:

an electric drive 44, and a drive axis of the electric drive 44 coincides with a target diagonal of the articulated quadrilateral for changing the target diagonal length to deform the articulated quadrilateral;

the power supply 5 is positioned in the movable space 42 between the inner connecting rod 4 and the outer connecting rod 41, and the power supply 5 is electrically connected with the electric driving piece 44.

Referring to fig. 1 and 3, in the present embodiment, two ends of the inner link 4 are rotatably connected to the base member 1 and the P joint member 2 by pin elements (i.e., a first pin element 301 and a second pin element 302 in the present application), and two ends of the outer link 41 are rotatably connected to the base member 1 and the P joint member 2 by pin elements (i.e., a third pin element 303 and a fourth pin element 304 in the present application), wherein the pin elements 301 and the pin elements 303 are connected to form a line by coordinate points, i.e., one diagonal a of an articulated quadrilateral (typically a parallelogram), and the pin elements 302 and the pin elements 304 are connected to form a line by coordinate points, i.e., the other diagonal b of the articulated quadrilateral, and the diagonal a is preferably selected as a target diagonal in the present application. The driving axis of the electric driver 44 (which coincides with the driving direction of the electric driver 44) substantially coincides with the diagonal line a.

In the actual riding process, a user adjusts the length of a diagonal line a by controlling the electric driving piece 44 to realize gear shifting operation, and in order to provide power for the electric driving piece 44 and reduce wiring, the power supply 5 and the electric driving piece 44 are connected into an integral structure, and through the design, the distance between the power supply 5 and the electric driving piece 44 can be shortened, the problem of complex wiring is avoided, and therefore the structural compactness of the electronic derailleur is improved; and is advantageous when the user replaces the power supply 5.

It should be noted that, when the bicycle is ridden on a bumpy road condition, the vibration source is transmitted from the tire to the base member 1 and the hinged quadrilateral member until being transmitted to the P-joint member 2, and because the hinged quadrilateral member and the P-joint member 2 of the present application have a buffer relationship, and the hinged quadrilateral member and the base member 1 also have a buffer relationship, the impact on the hinged quadrilateral member is reduced, that is, the vibration amplitude on the power supply 5 and the electric driver 44 is reduced compared with the prior art, so as to protect the power supply 5 and the electric driver 44.

In an embodiment, referring to fig. 2 and 4, the electric driving member 44 is connected to the hinged quadrilateral member through a mounting seat 43, and the power source 5 is installed on one side of the mounting seat 43, wherein the electric driving member 44 includes:

a motor 441, wherein the motor 441 is mounted on the other side of the mounting seat 43;

a control board 442, wherein the control board 442 is mounted on one side of the mounting base 43, and the control board 442 is electrically connected with the power source 5 and the motor 441 respectively;

a mounting member 443, said mounting member 443 being connected to the output shaft of said motor 441 for being reciprocally slidable along said drive axis when the output shaft of said motor 441 rotates, to change the length of said target diagonal.

Referring to fig. 4 and 5, in the present embodiment, for convenience of explanation, one side of the mount 43 is named as a first side 8, the other side of the mount 43 is named as a second side 81, both the control board 442 and the power source 5 are located on the first side 8, and the motor 441 is located on the second side 81, wherein the control board 442 is connected with the motor 441 (typically, a high-precision servo motor 441) through a wire, and particularly, a through hole through which a power supply wire passes may be provided on the mount 43, and the wire is passed through the through hole and connected with the motor 441 to avoid the wire from being exposed to the outside, thereby improving connection stability of the wire with the motor 441 and the control board 442.

This application is based on the bicycle and is in the vibration of high strength when riding the in-process especially in the mountain road, the bicycle is in the mode of connecting motor 441 and battery together through the electric wire among the prior art, lead to the electric wire to become flexible easily, thereby cause the electronic derailleur to lose function, so this application is provided with the terminal plug on control panel 442, be provided with the socket with the terminal plug adaptation on the power 5, during the installation promptly, directly with the socket of power 5 and terminal plug to be joined and be connected, can realize the electric connection of both, replace the mode of electric wire connection through the mode of terminal connection, improve the connection stability of power 5 and control panel 442.

In one embodiment, the mounting base 43 includes:

a base portion 431, an extension axis of the base portion 431 is overlapped with the driving axis, and a relief groove 435 in which the control board 442 is embedded is provided on one side of the base portion 431;

a bearing part 432, wherein the bearing part 432 is fixedly arranged at one end of the other side of the base part 431, and is provided with a bearing hole 436 for embedding the tail end of the motor 441;

the 2 opposite clamping

parts

433,2 are respectively and fixedly arranged at the other end of the other side of the base part 431, and clamping holes 437 for embedding the front end of the motor 441 are formed between the 2 clamping parts 433;

and a locking part 434, wherein the locking part 434 is connected with the 2 clamping parts 433, and is used for connecting the 2 clamping parts 433 after the front end of the motor 441 is embedded into the clamping hole 437, so as to clamp the motor 441.

In this embodiment, the first side 8 and the second side 81 are both located on the base portion 431, the bearing portion 432 and the clamping portion 433 are both connected with the second side 81 of the base portion 431 through welding or bolting, the yielding groove 435 is formed in the first side 8 of the base portion 431, the control board 442 is connected with the base portion 431 through bolting after being embedded into the yielding groove 435, in this embodiment, the locking portion 434 includes a bolt and a nut which are matched, the bearing hole 436 is embedded into the tail end of the motor 441, the front end of the motor 441 is embedded into the clamping hole 437, the bolt sequentially penetrates through the 2 clamping portions 433, then the nut is in threaded connection with the bolt, so that the 2 clamping portions 433 are close to each other (the 2 clamping portions 433 are elastically deformed), the purpose of locking the motor 441 on the base portion 431 is achieved, locking operation is simple, and later maintenance or replacement of the motor 441 is convenient.

In a specific embodiment, the power supply 5 includes:

a battery body 51, wherein the battery body 51 is electrically connected with the control board 442;

the battery case 52 is fastened to the mounting base 43, and the battery case 52 has a housing chamber for housing the battery body 51.

In the present embodiment, the battery body 51 is preferably selected as a storage battery for the purpose of environmental protection and energy saving, and the storage battery can be replaced by other types of batteries if needed and/or desired, so that the description thereof will not be repeated; the battery case 52 is a case with an opening, and the battery can be completely embedded into the battery case 52 to shield the battery, so that the damage of the battery to the external environment can be reduced to a certain extent. A buffer layer of a certain thickness may be provided in the receiving chamber if needed and/or desired.

In one embodiment, the battery housing 52 is detachably connected to the mounting base 43 through a connecting member 45.

Through detachable mounting means, can improve the operating efficiency that the user changed the battery.

In a specific embodiment, a first protrusion 6 is disposed at one end of the battery case 52, and a second protrusion 61 is disposed at the other end;

the connector 45 includes:

the limiting block 451 is fixedly arranged at one end of the mounting seat 43, and the limiting block 451 is provided with a matching hole 453 for embedding the first protrusion 6;

the buckle 452 is rotatably disposed at the other end of the mounting seat 43 and is connectable with the second protrusion 61 to fasten the battery case 52 to the mounting seat 43.

In this embodiment, after the battery body 51 is mounted in the accommodating cavity, the battery body 51 and the battery case 52 are moved along the length direction of the base portion 431, so that the first protrusion 6 is inserted into the mating hole 453 to achieve the purpose of limiting and positioning the battery case 52, and then the battery case 52 and the battery body 51 are fixed on the first side 8 of the base portion 431 by using the snap 452 in combination with the second protrusion 61.

In a specific embodiment, the other end of the battery case 52 is provided with a avoiding groove 53 into which the buckle 452 is inserted, and the buckle 452 includes:

a rotation part 7, wherein the rotation part 7 is rotatably connected in the avoidance groove 53;

a joint portion 71, wherein the joint portion 71 is fixedly arranged at the tail end of the rotating portion 7;

the fastening portion 72 is fixedly arranged between the rotating portion 7 and the engagement portion 71, and is used for abutting against the second protrusion 61.

In the present embodiment, the rotation part 7, the engagement part 71 and the fastening part 72 are integrally injection molded to improve the connection stability between the three parts, wherein the rotation part 7 is connected with the battery case 52 by means of shaft connection; this application is favorable to the user to press the linking portion 71 with the finger owing to the existence of linking portion 71 to make buckling portion 72 and the separation of second arch 61, and owing to dodge the existence in groove 53, can play the effect of sheltering from rotation portion 7, buckling portion 72, avoid buckle 452 to be pressed by the accident, and lead to the unexpected circumstances of separating of buckle 452 and second arch 61, that is to say, the user can only press linking portion 71 from dodging the opening in groove 53 through the finger.

More preferably, the second protrusion 61 is provided with a fastening surface 62 inclined downward toward the battery case 52, and the fastening portion 72 is provided with a press-fit surface 73 that mates with the fastening surface 62.

In this embodiment, the buckling surface 62 is inclined, so as to be beneficial to increasing the contact area between the second protrusion 61 and the buckle 452, and meanwhile, the buckle 452 can be better prevented from being separated from the second protrusion 61, i.e. the user needs to use a larger force to drive the buckle 452 to elastically deform and separate from the second protrusion 61.

Referring to fig. 6 to 8, in an embodiment, the P-joint member 2 includes:

a P-joint seat 21, the P-joint seat 21 being connected with the articulated quadrilateral member;

the P joint body 22, P joint body 22 includes set firmly in main shaft 23 of chain guide component 3 one end and cover are located reset spring 24 on the main shaft 23, reset spring 24's one end sets firmly in chain guide component 3 one end, the other end sets firmly inside the P joint seat 21 for reset to initial position after the rotation of P joint seat 21.

In this embodiment, one end of the inner link 4 is rotatably connected to the P joint seat 21 through the second pin element 302, one end of the outer link 41 is rotatably connected to the P joint seat 21 through the third pin element 303, meanwhile, the P joint seat 21 can rotate around the main shaft 23, and one end of the return spring 24 is fixedly arranged at the same end of the chain guide member 3, and the other end of the return spring is fixedly arranged inside the P joint seat 21, so that after the P joint seat 21 and the chain guide member 3 relatively rotate, the P joint seat 21 is driven to return to the initial position.

In a specific embodiment, the inner link 4 and the outer link 41 are both brackets, and the brackets include a connection portion (i.e., the first connection portion 100, the second connection portion 200) and 2 wing portions (i.e., the first wing portion 101, the second wing portion 102, the third wing portion 201, the fourth wing portion 202) respectively fixed at opposite ends of the connection portion, where each wing portion is rotationally connected to the corresponding position of the base member 1 or the P joint member 2 by a corresponding pin element (i.e., the first pin element 301, the second pin element 302, the third pin element 303, the fourth pin element 304 of the present application);

wherein the movable space 42 is located between 2 brackets, the mounting seat 43 is fixedly arranged at the end of the first pin member 301, and the mounting piece 443 is fixedly arranged at the end of the third pin member 303.

Specifically, the first wing portion 101 and the second wing portion 102 are respectively and fixedly disposed at two opposite ends of the first connecting portion 100, the third wing portion 201 and the fourth wing portion 202 are respectively and fixedly disposed at two opposite ends of the second connecting portion 200, that is, the bracket is U-shaped when viewed along the length direction thereof, the two brackets in the U-shape are buckled to form a shape of a "mouth", and the mounting seat 43 is mounted at a position between the 2 brackets.

Since the articulated quadrilateral member is correspondingly deformed when the bicycle is shifted or subjected to vibration, the connection between the outer connecting rod 41, the inner connecting rod 4 and the base member 1 and the P-joint seat 21 is realized through the pin element, and specifically, the pin element is the pin in interference fit or threaded fit with the base member 1 or the P-joint seat 21.

In the present embodiment, the drive source in the electric drive 44 is preferably provided as the motor 441 based on the motor 441 having a good control accuracy and thus achieving a desired change in the control of the target diagonal, but it should be understood that the motor 441 may be replaced with an electric putter if needed and/or desired.

In one embodiment, the mounting member 443 includes:

an external screw rod 9, wherein the external screw rod 9 is fixedly arranged at the tail end of the output shaft of the motor 441;

a female screw rod 91, the female screw rod 91 having a screw hole for screw-coupling with the male screw rod 9;

and a limiting piece 92, wherein the limiting piece 92 is rotationally connected with the third pin element and is used for limiting the rotation of the internal threaded rod 91.

In this embodiment, the rotation axes of the output shafts of the external threaded rod 9, the internal threaded rod 91 and the motor 441 are all coincident, under the limiting action of the limiting member 92, the motor 441 is started to drive the external threaded rod 9 to rotate, and then drive the internal threaded rod 91 to move along the driving axis, and when the internal threaded rod 91 moves in one direction of the driving axis due to the existence of each pin element, the motor 441 itself also moves in the other direction of the driving axis, that is, the distance between the first pin element 301 and the second pin element 302 is changed, and the deformation of the hinged quadrangle is driven.

In a specific embodiment, a limiting surface 93 is disposed on the outer peripheral side of the internal threaded rod 91 and extends along the length direction thereof, where the limiting member 92 includes:

the limiting seat 94, the limiting seat 94 is provided with a sliding hole for the sliding of the internal threaded rod 91;

the limiting rod 95 is fixedly arranged on the limiting seat 94 and abuts against the limiting surface 93.

In the present embodiment, the limiting surface 93 is a plane provided on the outer peripheral side of the internal threaded rod 91, and the internal threaded rod 91 does not rotate together but moves linearly when the external threaded rod 9 rotates in the threaded hole by the cooperation of the limiting surface 93 and the sliding hole.

In this embodiment, the limiting rod 95 includes a threaded portion 951 screwed onto the limiting seat 94, a hemispherical protrusion 952 fixed onto the threaded portion 951 by a compression spring 953, specifically, a clamping groove 954 into which the compression spring 953 is embedded is provided at the end of the threaded portion 951, one end of the compression spring 953 is fixed onto the bottom of the clamping groove 954, and the other end of the compression spring 953 is fixed onto the protrusion 952, so that the protrusion 952 can slide in the clamping groove 954 and extend out from the opening of the clamping groove 954 at least partially to abut against the limiting surface 93, and the limiting surface 93 has a distance with two end surfaces of the internal threaded rod 91 to limit the sliding distance of the internal threaded rod 91 on the limiting seat 94, so as to avoid the falling off condition of the internal threaded rod 91 and the limiting seat 94 when the motor 441 fails.

In a specific embodiment, each of the pin members is screwed to the base member 1 or the P joint member 2, and the inner link 4 and the outer link 41 are provided with a mounting hole (not shown) through which the pin member passes, wherein the hole diameter of the mounting hole is larger than the outer diameter of the pin member, and the third pin member 303 is provided with an elastic member for resetting the inner link 4.

In this embodiment, since the aperture of the mounting hole is larger than the outer diameter of the pin member, the motor 441 has a certain shaking space, and during the riding process, due to the influence of the bumpy road condition, the motor 441 can shake to a preset extent, thereby achieving the purpose of buffering.

In this embodiment, the P joint seat 21 is provided with an abutment surface 97 (as shown in fig. 2), and the abutment surface 97 abuts against a side wall of the outer link 41, so that the outer link 41 can rotate against the abutment surface 97 for limiting the position of the outer link 41, the elastic member is preferably provided as a torsion spring 98, the torsion spring 98 is sleeved on the third pin member 303, and one end of the torsion spring 98 is connected with the inner link 4, and the other end is connected with the P joint seat 21 for limiting the position of the inner link 4.

Embodiments of the present invention also provide a shifting bicycle comprising an electronic derailleur as described above and a bicycle body (not shown) on which the electronic derailleur is mounted.

It should be noted that the present application is primarily directed to an improvement of a rear derailleur of a bicycle, and therefore, the bicycle body will not be specifically explained, and the rear derailleur of the present application is adapted to be mounted to any existing bicycle body that has a shifting function.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. An electronic derailleur, comprising:

a base member (1), the base member (1) being for connection with a frame of a bicycle;

a P-joint member (2), the P-joint member (2) being connected with the base member (1) by a hinge quadrilateral member;

a chain guide member (3), wherein the P joint member (2) is rotatably provided at one end of the chain guide member (3);

the articulated quadrilateral member includes:

an inner link (4), wherein both ends of the inner link (4) are rotatably provided to the base member (1) and the P-joint member (2), respectively;

an outer link (41) having both ends of the outer link (41) rotatably provided to the base member (1) and the P-joint member (2), respectively, wherein the outer link (41) is provided in a hinged quadrangle so as to oppose the inner link (4);

characterized by further comprising:

-an electric drive (44), the drive axis of the electric drive (44) coinciding with a target diagonal of the articulated quadrilateral for varying the target diagonal length, thereby deforming the articulated quadrilateral;

the power supply (5) is positioned in the movable space (42) between the inner connecting rod (4) and the outer connecting rod (41), and the power supply (5) is electrically connected with the electric driving piece (44);

the electric driver (44) is connected with the articulated quadrilateral member through a mounting seat (43), and the power supply (5) is mounted on one side of the mounting seat (43), wherein the electric driver (44) comprises:

a motor (441), the motor (441) being mounted on the other side of the mounting seat (43);

a control board (442), wherein the control board (442) is installed on one side of the installation seat (43), and the control board (442) is electrically connected with the power supply (5) and the motor (441) respectively;

-a mounting member (443), said mounting member (443) being connected to an output shaft of said motor (441) for reciprocally sliding along said drive axis when the output shaft of said motor (441) rotates to change the length of said target diagonal;

the mount (43) includes:

a base portion (431), wherein an extension axis of the base portion (431) coincides with the driving axis, and a relief groove (435) into which the control board (442) is fitted is provided on one side of the base portion (431);

the bearing part (432), the bearing part (432) is fixedly arranged at one end of the other side of the base part (431), and is provided with a bearing hole (436) for embedding the tail end of the motor (441);

2 opposite clamping parts (433), wherein the 2 clamping parts (433) are fixedly arranged at the other end of the other side of the base part (431), and clamping holes (437) for embedding the front end of the motor (441) are formed between the 2 clamping parts (433);

and the locking parts (434) are connected with the 2 clamping parts (433) and are used for connecting the 2 clamping parts (433) after the front ends of the motors (441) are embedded into the clamping holes (437) so as to clamp the motors (441).

2. The electronic derailleur according to claim 1, characterized in that said power source (5) comprises:

the battery body (51), the said battery body (51) is connected with said control panel (442) electrically;

and the battery shell (52), the battery shell (52) is buckled on one side of the mounting seat (43), and the battery shell (52) is provided with a containing cavity for containing the battery body (51).

3. The electronic derailleur according to claim 2, characterized in that said battery housing (52) is detachably connected to said mounting seat (43) by means of a connecting piece (45).

4. An electronic derailleur according to claim 3, characterized in that said battery housing (52) is provided with a first projection (6) at one end and a second projection (61) at the other end;

wherein the connector (45) comprises:

the limiting block (451) is fixedly arranged at one end of the mounting seat (43), and the limiting block (451) is provided with a matching hole (453) for embedding the first bulge (6);

and the buckle (452) is rotatably arranged at the other end of the mounting seat (43) and can be connected with the second bulge (61) so as to fasten the battery shell (52) to the mounting seat (43).

5. The electronic derailleur according to claim 4, characterized in that the other end of the battery housing (52) is provided with a relief groove (53) in which the snap (452) is embedded, the snap (452) comprising:

a rotating part (7), wherein the rotating part (7) is rotatably connected in the avoidance groove (53);

the connecting part (71), the connecting part (71) is fixedly arranged at the tail end of the rotating part (7);

the buckling part (72), the buckling part (72) is fixedly arranged between the rotating part (7) and the connecting part (71) and is used for abutting against the second bulge (61).

6. The electronic derailleur according to claim 5, characterized in that said second protrusion (61) is provided with a buckling surface (62) inclined downward toward said battery case (52), and said buckling portion (72) is provided with a pressing surface (73) that cooperates with said buckling surface (62).

7. The electronic derailleur according to claim 1, characterized in that: the inner connecting rod (4) and the outer connecting rod (41) are brackets, each bracket comprises a connecting part (100, 200) and 2 wing parts (101, 102, 201, 202) respectively fixedly arranged at opposite ends of the connecting part, and each wing part is rotationally connected with the corresponding position of the base component (1) or the P joint component (2) through corresponding pin elements (301, 302, 303, 304);

the movable space (42) is located between 2 brackets, the mounting seat (43) is fixedly arranged at the tail end of the first pin element (301), and the mounting piece (443) is fixedly arranged at the tail end of the third pin element (303).

8. A speed-changing bicycle, characterized in that: comprising an electronic derailleur according to any of claims 1-7 and a bicycle body, said electronic derailleur being mounted to said bicycle body.