CN117022521B

CN117022521B - An electronic rear derailleur for bicycles and a bicycle

Info

Publication number: CN117022521B
Application number: CN202311041977.3A
Authority: CN
Inventors: 迟名波; 赵习刚
Original assignee: Qingdao Magene Intelligence Technology Co Ltd
Current assignee: Qingdao Magene Intelligence Technology Co Ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2026-01-30
Anticipated expiration: 2043-08-17
Also published as: CN117022521A

Abstract

The invention provides an electronic rear derailleur of a bicycle and the bicycle, wherein a first base end of a base unit is used for being connected to the bicycle, a guide part is formed on a second base end of the base unit, a follow-up part is formed on a first moving end of a movable unit, a second moving end of the movable unit is used for being connected with a chain guide unit, a driving unit drives the movable unit to move along the guide part in the process of moving close to or far from the base unit, a second end of the movable unit swings in the direction of moving away from an axis of the sprocket unit in the process of driving the movable unit to move close to the sprocket unit by the driving unit, and a second end of the movable unit swings in the direction of moving close to the axis of the sprocket unit in the process of driving the movable unit to move away from the sprocket unit by the driving unit. The invention has simple structure and can replace the existing four-bar mechanism to realize the purpose of driving the upper guide wheel to guide the chain to move to the target sprocket.

Description

Electronic rear speed changer of bicycle and bicycle

Technical Field

The invention belongs to the technical field of bicycles, and particularly relates to a rear derailleur of a bicycle electrical appliance and a bicycle.

Background

The electronic rear derailleur for a bicycle is used for guiding a chain to one of the toothed discs of the rear sprocket, and the bicycle can achieve the effect of shifting gears by the cooperation between the chain and the different toothed discs due to the fact that each of the toothed discs of the rear sprocket has different sizes. In the prior art, the electronic rear derailleur of the bicycle realizes the rear shifting function through a four-bar mechanism, and realizes the connection of the movable unit and the driving unit.

However, the four bar linkage is relatively complex, and there is no simple mechanism for realizing the power transmission from the driving unit to the movable unit and the back-pulling function.

Therefore, the electronic rear derailleur of the bicycle and the bicycle are developed, the structure is simple, the function of driving the upper guide wheel to guide the chain to move to the target sprocket is realized by being separated from the traditional four-bar mechanism, and the technical problem to be solved is urgent.

Disclosure of Invention

The invention aims to provide a rear derailleur of a bicycle electrical appliance and a bicycle, which have simple structures and can replace the existing four-bar mechanism to realize the purpose of driving an upper guide wheel to guide a chain to move to a target sprocket.

In order to achieve the aim of the invention, the invention is realized by adopting the following technical scheme:

In one aspect, the invention provides an electronic rear derailleur for a bicycle, which is used for driving a chain guide unit to drive a chain to move to a target sprocket of a sprocket unit, wherein a first base end of the base unit is used for being connected to the bicycle, a guide part is formed on a second base end of the base unit, a follow-up part is formed on a first moving end of the movable unit, a second moving end of the movable unit is used for being connected with the chain guide unit, the follow-up part moves along the guide part during the process of driving the movable unit to move close to or away from the base unit, the second end of the movable unit swings towards a direction away from an axis of the sprocket unit during the process of driving the movable unit to move away from the sprocket unit, and the second end of the movable unit swings towards a direction close to the axis of the sprocket unit during the process of driving the movable unit to move away from the sprocket unit.

In some embodiments of the present application, the chain guide unit includes an upper guide pulley, two surfaces defining an equal distance from a circumferential edge of the chain pulley in a radial direction are a first tapered surface and a second tapered surface, respectively, the first tapered surface being spaced from the second tapered surface by 10mm in the radial direction, and the follower member moves along a region between the first tapered surface and the second tapered surface during movement along the guide member.

In some embodiments of the application, the guide member is disposed on the first base end extending away from the sprocket unit to near the sprocket unit and approaching in a radial direction toward a target movement direction of the sprocket guide unit.

In some embodiments of the present application, a sleeving part is formed on the second base part, the guiding part is arranged on the inner side wall of the sleeving part, a pivoting part is formed on the first moving part, the follow-up part is arranged on the outer side wall of the pivoting part, and the sleeving part is sleeved outside the pivoting part.

In some embodiments of the application, the guide member is a recess formed on the sleeve portion, the follower member is a boss formed on the pivot portion, and the boss is movable along the recess.

In some embodiments of the application, the contact of the inner surface of the recess with the outer surface of the boss is contoured.

In some embodiments of the present application, an external thread portion is formed on an output shaft of the driving unit, an internal thread portion is formed in the pivoting portion in a direction away from the sprocket unit to a direction close to the sprocket unit, and the output shaft of the driving unit and the pivoting portion are connected with the internal thread portion through the external thread portion.

In some embodiments of the present application, the driving unit includes a motor, and an output shaft of the driving unit is an output shaft of the motor, and the motor is connected to the base unit.

In some embodiments of the application, the boss is provided on a side wall of an end of the pivot portion remote from the sprocket unit.

In another aspect, the present invention also provides a bicycle comprising the electronic rear derailleur of the bicycle as described in any one of the preceding claims.

Compared with the prior art, the invention has the advantages and positive effects that:

By providing a base unit, a first base end of which is connected to the bicycle and a second base end of which is formed with a guide member, by forming a follower member on a first moving end of the movable unit, the chain guide unit is connected to a second moving end, the follower member moves along the guide member during movement of the first moving end along the second base end, the movable unit approaches or moves away from the base unit, the second moving end swings in a target movement direction of an upper guide pulley of the chain guide unit, that is, the second end of the movable unit swings in a direction away from an axis of the sprocket unit during driving of the movable unit by the driving unit, and the second end of the movable unit swings in a direction toward an axis of the sprocket unit during driving of the movable unit away from the sprocket unit. Therefore, the aim of driving the upper guide wheel to guide the chain to move to the target sprocket is fulfilled instead of the existing four-bar mechanism, and compared with the existing four-bar mechanism, the structure is simpler.

Other features and advantages of the present invention will become apparent upon review of the detailed description of the invention in conjunction with the drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in 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 representation of the use of one embodiment of an electronic rear derailleur for a bicycle in accordance with the present invention;

FIG. 2 is a partial schematic view of FIG. 1 at A;

FIG. 3 is another schematic representation of the use of one embodiment of an electronic rear derailleur for a bicycle in accordance with the present invention;

FIG. 4 is a partial schematic view at B in FIG. 3;

FIG. 5 is a schematic view of the structure of the first conical surface marked in FIG. 4;

FIG. 6 is a schematic structural view of an embodiment of a base unit of an electronic rear derailleur for a bicycle in accordance with the present invention;

FIG. 7 is another structural schematic diagram of an embodiment of a base unit of an electronic rear derailleur for a bicycle in accordance with the present invention;

FIG. 8 is another structural schematic diagram of an embodiment of a movable unit of an electronic rear derailleur for a bicycle in accordance with the present invention;

FIG. 9 is another structural schematic diagram of an embodiment of a drive unit of an electronic rear derailleur for a bicycle in accordance with the present invention;

In the drawing the view of the figure,

100, A driving unit;

110, an output shaft;

111, an external thread portion;

200, a movable unit;

210, a first mobile terminal;

211, a pivoting part;

212, a follower;

220, a second mobile terminal;

300, a base unit;

310, a first base end;

320, a second base end;

321, a sleeving part;

322, guiding members;

400, bicycle body;

500, a chain guide unit;

510, upper guide wheels;

600, a chain;

700, sprocket unit;

710, sprocket;

720, a third conical surface;

731, a first tapered surface;

732, a second conical surface.

Detailed Description

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

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, directly connected, or indirectly connected via an intermediary. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

In the present embodiment, as shown in fig. 1, 2, 3, 4, and 5, an electronic rear derailleur for a bicycle is provided to replace the conventional four-bar mechanism for transmitting power from a driving unit 100 to a movable unit 200.

In this embodiment, the bicycle electronic rear derailleur includes the base unit 300 and the chain guide unit 500 in addition to the drive unit 100 and the movable unit 200 described above.

The bicycle includes a bicycle body 400 and a sprocket unit 700 in addition to the electronic rear derailleur of the bicycle.

The drive unit 100 can be mounted on the bicycle body 400 by the base unit 300.

The sprocket unit 700 is directly mounted to the bicycle body 400.

The sprocket unit 700 includes a plurality of sprockets 710. The plurality of sprockets 710 are coaxially arranged on the bicycle body 400 in such a manner that their diameters gradually increase or decrease.

Specifically, the smaller diameter sprocket 710 is disposed proximate to the base unit 300, and the smaller diameter sprocket 710 is disposed distal from the base unit 300.

The bicycle electronic rear derailleur is mounted to the bicycle body 400. The electronic rear derailleur of the bicycle is used to move the chain 600 between the plurality of sprockets 710.

Specifically, the chain 600 moves the chain 600 between the plurality of sprockets 710 by the chain guide unit 500.

In the present embodiment, as shown in fig. 4 and 5, the diameters of the plurality of sprockets 710 gradually increase in a direction from approaching the electronic rear derailleur to separating the electronic rear derailleur.

The electronic rear derailleur is used for driving the chain 600 to move between the plurality of sprockets 710 by the chain guide unit 500, thereby moving to the target sprocket 710 to engage therewith.

As shown in fig. 6 and 7, both ends of the base unit 300 are formed with a first base end 310 and a second base end 320, respectively. The base unit 300 is mounted to the bicycle body 400 via the first base end 310.

The first base end 310 of the base unit 300 is for attachment to a bicycle body 400.

In this embodiment, the first base end 310 is fixedly disposed on the bicycle body 400.

The second base end 320 has a guide member 322 formed thereon.

As shown in fig. 8, the movable unit 200 is formed with a first movable end 210 and a second movable end 220 at both ends thereof, respectively.

The first movable end 210 is connected to the second base end 320.

The first moving end 210 and the second base end 320 are coaxially disposed, and the second base end 320 can rotate relative to the first moving end 210 during movement of the first moving end 210 relative to the second base end 320 along an axial direction thereof.

Thereby achieving synchronous swinging of the movable unit 200 during approaching or moving away from the base unit 300, thereby driving the chain guide unit 500 to move the chain 600 to a position at which it engages with one of the plurality of sprockets 710.

In order to enable relative rotation during movement of the first moving end 210 in the axial direction thereof with respect to the second base end 320, a guide member 322 is formed on the second base end 320, and a follower member 212 is formed on the first moving end 210.

During movement of the movable unit 200 relative to the base unit 300 to approach the sprocket unit 700, the follower member 212 moves along the guide member 322, and the second moving end 220 swings in a direction away from the axis of the plurality of sprockets 710.

In this embodiment, the chain guide unit 500 is coupled to the second moving end 220. During the swinging of the second moving end 220 in a direction away from the axes of the plurality of sprockets 710, the chain guide unit 500 swings therewith, thereby driving the chain 600 to move in a direction toward the larger diameter sprocket 710 to engage with the target sprocket 710.

During movement of the movable unit 200 relative to the base unit 300 to move away from the sprocket unit 700, the follower member 212 moves along the guide member 322,

The guide member 322 is provided on the first base unit 310 extending in a direction from the sprocket unit 700 to the sprocket unit 700, and gradually approaches toward the target moving direction of the sprocket guide unit 500 in the radial direction.

The second moving end 220 swings in a direction approaching the axes of the plurality of sprockets 710.

The chain guide unit 500 swings therewith to drive the chain 600 to move toward the smaller diameter sprocket 710 to engage with the target sprocket 710.

Specifically, chain guide unit 500 includes an upper guide roller 510 and a lower guide roller 520.

Chain 600 is engaged with sprocket 710, upper guide roller 510, and lower guide roller 520.

The upper guide roller 510 guides the chain 600 to be engaged with the sprocket 710 at a corresponding position, and the lower guide roller 520 is used for tensioning the chain 600.

In order to cause the second moving end 220 to swing toward the axial direction away from the sprocket unit 700 during the movement of the movable unit 200 relative to the base unit 300 to approach the sprocket unit 700, the guide member 322 is provided on the first base unit 310 to extend in the direction away from the sprocket unit 700 to approach the sprocket unit 700, and gradually approaches toward the target movement direction of the sprocket guide unit 500 in the radial direction.

In this embodiment, the second base end 320 has a sleeve 321 formed thereon. The guide member 322 is formed on an inner sidewall of the sheathing part 321.

The first moving end 210 is formed with a pivot portion 211. The follower 212 is disposed on the outer sidewall of the pivoting portion 211.

The base unit 300 and the movable unit 200 are connected to the first movable end 210 through the second base end 320, specifically, the sleeving part 321 is sleeved outside the pivoting part 211, and the follower 212 moves along the guide part 322.

Thereby realizing that the follower member 212 moves along the guide member 322 during the process of moving the pivot portion 211 along the sleeve portion 321.

Specifically, the guide member 322 is a recess formed on the fitting portion 321.

The follower 212 is a boss formed on the pivot 211.

The protruding portion is installed in the depressed portion, and the protruding portion moves along the depressed portion.

Specifically, in order to realize smooth movement of the protruding portion along the recessed portion, a contact position between the inner surface of the recessed portion and the outer surface of the protruding portion is contoured.

Specifically, the protrusions and depressions may be suitably clearance fit.

In this embodiment, the cross section of the recess is an arc-shaped cross section. The outer surface of the boss is also an arcuate surface.

Specifically, the boss is provided on a side wall of the pivoting portion 211 at an end remote from the sprocket unit 700.

So that the movable unit 200 can always be within the guide member 322 during movement relative to the base unit 300, and the follower member 212 does not come out of the guide member 322 during movement along the guide member 322.

In the process that the follower 212 moves along the guide member 322, the second moving end 220 can drive the chain guiding unit 500 to move to the target position, so that the chain 600 can be accurately meshed with the target sprocket 710, and it is required that the second moving end 220 can drive the chain guiding unit 500 to move along a certain track, and in particular, the second moving end 220 can drive the upper guide pulley 510 to move along a certain track.

Specifically, the size of the plurality of sprockets 710, the size and position of the upper guide wheel 510, the structural size of the movable unit 200, and the structural size of the base unit 300 can be determined according to the size and position of the plurality of sprockets 710, the specific position of the follower 212 on the sleeve 321 when the chain 600 is engaged with each sprocket 710, and the guide member 322 should be disposed along the target position of each follower 212, so that the upper guide wheel 510 can drive the chain 600 to move along the target path during the movement of the follower 212 along the guide member 322, so as to match the plurality of sprockets 710, and the chain 600 is engaged with the target sprocket 710.

Specifically, the plurality of sprockets 710 form a tapered structure with outer edges of the plurality of sprockets 710 spaced along the tapered surface.

Two tapered surfaces equidistant from the tapered surfaces on which the outer edges of the plurality of sprockets 710 are located are defined as a first tapered surface 731 and a second tapered surface 732.

The first tapered surface 731 is a surface equidistant from the circumferential edges of the plurality of sprockets 710. The first tapered surface 731 is defined a distance H from the circumferential edges of the plurality of sprockets 710.

The second tapered surface 732 is a surface equidistant from the circumferential edges of the plurality of sprockets 710. The second tapered surface 732 is defined as being a distance h from the circumferential edges of the plurality of sprockets 710.

The distance between the first tapered surface 731 and the second tapered surface 732 in the radial direction is 10mm.

The orientation of guide member 322 on bushing portion 321 is such that upper guide wheel 510 is movable along the region defined between first tapered surface 731 and second tapered surface 732 during movement of follower member 212 along guide member 322, thereby enabling chain 600 engaged on upper guide wheel 510 to move with upper guide wheel 510 into engagement with target sprocket 710.

To enable chain 600 on upper guide wheel 510 to more precisely engage target sprocket 710, a third tapered surface 720 is formed between first tapered surface 731 and second tapered surface 732 equidistant from the outer edges of the plurality of sprockets 710.

However, it is sufficient that upper guide wheel 510 can move along the region formed by first tapered surface 731 and second tapered surface 732 due to the presence of machining errors and the like.

In the present embodiment, as shown in fig. 9, in order to realize the process of driving the movable unit 200 to move relative to the base unit 300, a driving unit 100 is provided.

An external screw portion 111 is formed on the output shaft 110 of the driving unit 100.

An internal thread portion is formed in the pivoting portion 211 in a direction away from to near the sprocket unit 700.

The connection between the output shaft of the drive unit 100 and the pivot portion 211 is achieved by the threaded connection between the male screw portion 111 and the female screw portion.

Thereby realizing the driving of the pivoting portion 211 by the driving unit 100.

Specifically, the driving unit 100 may employ a motor. The output shaft 110 of the drive unit 100 is the output shaft of the motor.

The drive unit 100 is connected to the bicycle body 400 via the base unit 300.

In still other embodiments, a bicycle is also contemplated, including the electronic rear derailleur of a bicycle described above.

The above embodiments are only for illustrating the technical solution of the present invention, but not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solution described in the above embodiments or equivalents may be substituted for some of the technical features thereof, and the modifications or substitutions do not depart from the spirit and scope of the technical solution as claimed in the present invention.

Claims

1. An electronic rear derailleur for bicycles, characterized in that it comprises:

A base unit has a first base end and a second base end formed at its two ends. The first base end is used to connect to a bicycle, and a guide member is formed on the second base end. A fitting portion is formed on the second base end, and the guide member is formed on the inner sidewall of the fitting portion. The guide member is a recess formed on the fitting portion. The guide member extends from away from the sprocket unit to near the sprocket unit on the second base end and moves radially toward the target movement direction of the sprocket guide unit.

A movable unit has a first movable end and a second movable end formed at its two ends respectively. A follower component is formed on the first movable end. A pivot portion is formed on the first movable end. The follower component is disposed on the outer side wall of the pivot portion. A fitting portion is fitted onto the pivot portion. The follower component is a protrusion formed on the pivot portion. The protrusion is movable along the recess.

The drive unit drives the movable unit to move closer to or away from the base unit, and the follower component moves along the guide component during this process.

A chain guide unit is connected to the second moving end, which drives the chain guide unit to move the chain to the target sprocket of the sprocket unit. The chain guide unit includes an upper guide wheel; a first conical surface is defined as a surface with a radial distance H from the circumferential edge of the sprocket; a second conical surface is defined as a surface with a radial distance h from the circumferential edge of the sprocket; the radial distance between the first conical surface and the second conical surface is 10 mm; during the movement of the follower component along the guide component, the circumferential edge of the upper guide wheel of the chain guide unit moves along the area between the first conical surface and the second conical surface.

During the process of the drive unit driving the movable unit to approach the sprocket unit, the second movable end swings in a direction away from the axis of the sprocket unit;

During the process of the drive unit driving the movable unit away from the sprocket unit, the second movable end swings toward the axis of the sprocket unit.

2. The electronic rear derailleur of a bicycle according to claim 1, characterized in that the contact point between the inner surface of the recess and the outer surface of the protrusion is designed to mimic the contour.

3. The electronic rear derailleur for bicycles according to claim 1, characterized in that,

An external thread is formed on the output shaft of the drive unit;

The pivot portion has an internal thread formed along the direction from away from to near the sprocket unit;

The output shaft of the drive unit is connected to the pivot portion via the external thread portion and the internal thread portion.

4. The electronic rear derailleur for bicycles according to claim 3, wherein the drive unit includes a motor, and the output shaft of the drive unit is the output shaft of the motor;

The motor is connected to the base unit.

5. The electronic rear derailleur of a bicycle according to claim 1, wherein the protrusion is disposed on the side wall of the pivot portion away from the sprocket unit.

6. A bicycle, characterized in that it includes the electronic rear derailleur as described in any one of claims 1 to 5.