Novel chain guide assembly for bicycle derailleur

Abstract

The utility model discloses a novel chain guide assembly for a bicycle derailleur, which comprises a guide plate, a transmission part, a transmission part fixing cap, an upper guide wheel and a lower guide wheel, the lower guide wheel comprises a lower guide wheel body, a first lower guide wheel bearing protection pressing end cover, a lower guide wheel rotating bearing and a second lower guide wheel bearing protection pressing end cover. According to the chain guide assembly, the problems that environmental pollutants such as silt, rainwater and liquid enter a guide wheel system to cause speed change failure and even chain separation and the like of an existing chain guide assembly are solved, and a rider can have a lighter and more comfortable riding feeling; and meanwhile, the lower guide wheel main body can be freely switched in different road condition scenes such as leisure riding, mountain cross-country, daily training or competition field racing, so that the speed control system can obtain the optimal working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle derailleur technical field, especially a new bicycle chain guide assembly for chain derailleur. BACKGROUND

[0002] At present, the speed change system of high-performance professional bicycle usually adopts external adjustable speed derailleur, wherein the rear derailleur is the main speed adjusting component. The rear derailleur mainly drives the chain guide assembly through the displacement mechanism, so that the chain guide assembly pushes the chain and transmits the chain to the sprocket with different teeth to realize speed change. In the whole speed change process, the chain guide assembly plays a crucial role.

[0003] The existing chain guide assembly structure adopts double-plate guide plate design, which leads to complex preparation and assembly process and increases the weight on high-performance racing bicycles. In addition, the rotating bearing of the upper guide wheel and the lower guide wheel is usually gap-fitted with the guide wheel body during assembly, that is, the middle through hole size of the guide wheel body is equal to or greater than the outer diameter of the guide wheel rotating bearing, the guide wheel rotating bearing is placed in the guide wheel body, or the guide wheel rotating bearing is fixed by using adhesive glue and other media. Due to the existence of assembly gap error or the participation of flexible medium (such as adhesive glue), the precise assembly accuracy of the guide wheel cannot be ensured, which leads to slow response of the guide wheel in the chain guide assembly during the displacement speed change process of the rear derailleur, and it is difficult to quickly transmit the chain to the sprocket with different teeth. Coarse assembly accuracy makes the guide wheel prone to eccentric wear or abnormal wear during work, which affects the smoothness of the speed change process, increases the speed change response time, or leads to speed change failure.

[0004] In addition, the traditional bearing protection compression end cover in the existing upper and lower guide wheel structure is usually in the form of a round sheet, and pollutants in the external environment can easily enter from the gap on the side of the end cover. It cannot effectively prevent pollutants such as mud and rainwater from invading the guide wheel system, damaging the operation of the guide wheel rotating bearing and the guide wheel body, and leading to speed change failure or even chain disengagement. These problems not only affect the riding experience, but also may cause traffic accidents. SUMMARY

[0005] Therefore, the utility model provides a new bicycle chain guide assembly for chain derailleur, which solves the precision and response time problems of the speed change system, prevents environmental pollutants such as mud and rainwater from affecting the guide wheel system, is suitable for various road conditions, and provides a more convenient and comfortable riding experience. The technical scheme of the utility model is as follows:

[0006] The utility model provides a new bicycle chain guide assembly for chain derailleur, which includes a guide plate, a transmission component, a transmission component fixing cap, an upper guide wheel, and a lower guide wheel.

[0007] Specifically, the upper guide wheel comprises an upper guide wheel body, an upper guide wheel rotating bearing, and an upper guide wheel bearing protection compression end cover; the lower guide wheel comprises a lower guide wheel body, a first lower guide wheel bearing protection compression end cover, a lower guide wheel rotating bearing, and a second lower guide wheel bearing protection compression end cover; the guide plate is a single-piece torsion structure; the transmission component is assembled with the chain shifter; the transmission component is arranged on one side of the upper end of the guide plate; the upper guide wheel is fixed on the other side of the upper end of the guide plate; the lower guide wheel is fixed on the lower end of the guide plate and on the other side opposite to the upper guide wheel; the upper guide wheel body is provided with an inner hole; the inner hole is a concave structure; the upper guide wheel rotating bearing is assembled in the inner hole and is rigidly assembled with interference; the two side end faces of the upper guide wheel body are provided with bosses; one side end face of the transmission component fixing cap is a concave structure and is clearance fitted with the boss of one side end face of the upper guide wheel body; and the end face of the upper guide wheel protection compression end cover is a groove structure and is clearance assembled with the boss of the other side end face of the upper guide wheel body.

[0008] Optionally, the transmission component adopts a movable rotating shaft or a positioning seat; the transmission component fixing cap adopts a movable rotating shaft fixing cap or a positioning seat fixing cap; and the transmission component is compressed by using the transmission component fixing cap.

[0009] Specifically, the chain shifter is provided with an assembly surface; the transmission component is assembled and attached to the assembly surface; the other end of the guide plate is provided with a mounting hole for assembly with the first lower guide wheel bearing protection compression end cover; the mounting hole adopts a threaded structure or a through hole structure; and the turning area of the guide plate is provided with a chain constraint structure.

[0010] Specifically, one end of the guide plate is connected with the transmission component through a mounting hole; the connection adopts a protruding assembly structure or a recessed assembly structure; and the mounting hole is a through hole structure or a threaded structure.

[0011] Specifically, one end of the transmission component is provided with a shaft stop; and the shaft stop is assembled with the upper guide wheel rotating bearing.

[0012] Specifically, one side of the upper guide wheel protection compression end cover is a groove structure; the other side is an external thread structure; one end of the transmission component is provided with an internal thread hole; the external thread is assembled with the internal thread hole to fix the upper guide wheel on the transmission component.

[0013] Specifically, the lower guide wheel body is provided with an inner hole; the inner hole of the lower guide wheel body is an L-shaped cross-section structure; the lower guide wheel rotating bearing is embedded in the inner hole of the lower guide wheel body; the inner hole of the lower guide wheel rotating bearing is matched with the outer circle of the first lower guide wheel bearing protection compression end cover; the second lower guide wheel protection compression end cover compresses the end face of the lower guide wheel rotating bearing and is fixed on the mounting surface of the other end of the guide plate.

[0014] Specifically, the guide plate is provided with a plurality of positioning holes for positioning with the tension spring of the derailleur, the guide plate is provided with a rotation positioning hole for rotation limiting with the derailleur, and the guide plate is provided with a first chain drop preventing baffle structure.

[0015] Specifically, the lower guide wheel adopts a large hollow structure, and the end face of the lower guide wheel body is provided with a second chain drop preventing baffle structure.

[0016] Specifically, the material of the upper guide wheel body and the material of the body of the lower guide wheel are metal, carbon fiber, composite material, ceramic or plastic.

[0017] The advantages of the utility model are as follows:

[0018] 1. The utility model improves the guide plate structure, adopts single-piece turning design, reduces the overall weight, and strengthens the strength of the guide plate.

[0019] 2. The utility model designs the inner hole of the guide wheel body as a concave structure, constrains the guide wheel rotating bearing, prevents the bearing from longitudinally moving, adopts rigid interference assembly mode, improves the speed change positioning precision and following response time, and thus improves the response speed and stability of the speed change.

[0020] 3. The utility model improves the structure of the upper guide wheel and the bearing protection end cover, avoids that pollutants such as mud and rainwater enter the guide wheel system, and greatly improves the stability and safety of the speed change transmission.

[0021] 4. The utility model adopts the guide wheel rotating bearing with a larger diameter on the lower guide wheel, reduces the horizontal deflection error, improves the guiding stability, and utilizes greater rotational inertia to make the cycling more convenient and comfortable.

[0022] 5. The chain drop preventing baffle structure pattern on the lower guide wheel body of the utility model can be replaced, meets the demand of different road conditions, provides different pneumatic effects, visual experience and protection reliability, and makes the speed change system provide the optimal working condition and use experience under various road conditions. DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only one embodiment of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0024] Wherein the same parts are denoted by the same reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to the directions towards or away from the geometric center of a particular component.

[0025] Figure 1 is an exploded view of the embodiment of the utility model;

[0026] Figure 2 is an assembly view of the upper guide wheel in the embodiment of the utility model;

[0027] Figure 3 is a schematic view of the lower guide wheel body in the embodiment of the utility model;

[0028] Figure 4 is a schematic view of the guide plate in the embodiment of the utility model;

[0029] Figure 5 is a schematic view of the chain derailleur in the embodiment of the utility model;

[0030] Figure 6 is a schematic view of the transmission component in the embodiment of the utility model.

[0031] In the above drawings, the meanings of the reference numerals are as follows:

[0032] 1, guide plate;

[0033] 11, positioning hole;

[0034] 12, rotating positioning hole;

[0035] 13, first chain drop prevention baffle structure;

[0036] 2, transmission component;

[0037] 21, shaft stop;

[0038] 3, transmission component fixing cap

[0039] 4, upper guide wheel;

[0040] 41, upper guide wheel body;

[0041] 42, upper guide wheel rotating bearing;

[0042] 43, upper guide wheel bearing protection compression end cover;

[0043] 5, lower guide wheel;

[0044] 51, lower guide wheel body;

[0045] 511, second chain drop prevention baffle structure;

[0046] 52. First lower guide bearing protective compression end cap;

[0047] 53. Lower guide rotating bearing;

[0048] 54. Second lower guide bearing protective compression end cap;

[0049] 6. Chain derailleur;

[0050] 61. Chain derailleur assembly face. DETAILED DESCRIPTION

[0051] The technical solutions of the present application will be described clearly and completely below in combination with the embodiments of the present application and the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specific embodiments are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0053] In the description of the specific embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0054] In the present application, "embodiment" means that the specific features, structures or properties described in combination with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments.

[0055] In the description of the embodiments of the utility model, the term "and / or" is only a kind of description of the association relationship of associated object, it indicates that there can be three kinds of relations, for example A and / or B, it can indicate: there are three kinds of cases of A alone, A and B exist simultaneously, B alone exists.In addition, the character " / " in the utility model, generally indicates that the associated object before and after is a kind of "or" relationship.

[0056] Throughout the utility model, numerical value indicates the approximation measurement or limit to range, to cover slight deviation with given value and the embodiment with the value mentioned and the embodiment with the exact value mentioned.All numerical values of parameters such as quantity or condition in the specification including the claims provided in the end of specific embodiment should be understood as being modified by the term "about" in all cases, whether "about" is actually appeared before this numerical value or not."About" indicates that the numerical value stated allows to exist some slight inaccuracy, is close to the exact value of the value stated to some extent;Approximately or reasonably close to the value stated;Almost.If the inaccuracy provided by "about" is not understood in this ordinary meaning in the art, then "about" as used in the utility model at least indicates the variation that can be produced by the ordinary method of measurement and using such parameter.For example, "about" can include less than or equal to 5%, optionally less than or equal to 4%, optionally less than or equal to 3%, optionally less than or equal to 2%, optionally less than or equal to 1%, optionally less than or equal to 0.5% variation, and in some aspects, optionally less than or equal to 0.1% variation.

[0057] In addition, the disclosure of range includes all values within the entire range and the disclosure of further divided range, including the end points and subranges given for these ranges.

[0058] The embodiments of the utility model will be described more specifically by examples below.It should be noted that the embodiments of the utility model are not limited to these examples only.

[0059] The existing chain guide assembly structure uses double-plate guide plates, which makes the manufacturing and assembly process complex and increases the weight of high-performance racing bicycles. When assembling the rotating bearing of the upper guide wheel and the lower guide wheel with the guide wheel body, a gap fit is usually used, that is, the size of the through hole in the middle of the guide wheel body is equal to or greater than the outer diameter of the guide wheel rotating bearing, and then the guide wheel rotating bearing is placed in the guide wheel body, or an adhesive or other medium is used to fix the guide wheel rotating bearing in the guide wheel body. Due to the existence of assembly gap error or the participation of flexible medium (adhesive or the like), the guide wheel cannot be precisely assembled, which causes the guide wheel in the chain guide assembly to not quickly respond to the chain transmission to different sprocket wheels during the displacement of the derailleur, and the rough production and assembly precision makes the guide wheel prone to abnormal wear during operation, which can cause rough shifting, increase the shifting response time, or cause shifting failure. In addition, in the existing upper and lower guide wheel structure, the traditional bearing protection compression end cover is usually a round plate, and pollutants in the external environment can easily enter from the gap on the side of the bearing protection compression end cover, which cannot effectively prevent mud and rainwater and other environmental pollutants from entering the guide wheel system, causing damage to the guide wheel rotating bearing and the guide wheel body during operation, resulting in shifting failure or even chain breakage. These problems can affect the riding experience and even cause traffic accidents.

[0060] Therefore, the present application discloses a new chain guide assembly for bicycle derailleur to solve the above problems.

[0061] In a specific embodiment, as shown in Figures 1-6 A new chain guide assembly for bicycle derailleur includes a guide plate 1, a transmission component 2, a transmission component fixing cap 3, an upper guide wheel 4, and a lower guide wheel 5.

[0062] In this embodiment, the guide plate 1 is a single-piece torsion structure, the transmission component 2 is assembled with the derailleur 6, the upper guide wheel 1 includes an upper guide wheel body 41, an upper guide wheel rotating bearing 42, and an upper guide wheel bearing protection compression end cover 43, and the lower guide wheel 5 includes a lower guide wheel body 51, a first lower guide wheel bearing protection compression end cover 52, a lower guide wheel rotating bearing 53, and a second lower guide wheel bearing protection compression end cover 54. The transmission component 2 is located on one side of the upper end of the guide plate 1, the upper guide wheel 4 is fixed to the other side of the upper end of the guide plate 1, and the lower guide wheel 5 is fixed to the other side of the lower end of the guide plate 1 opposite the upper guide wheel 4. The transmission component 2 uses a movable shaft or a positioning seat, and the transmission component fixing cap 3 uses a movable shaft fixing cap or a positioning seat fixing cap.

[0063] Further, the side end face of the transmission component fixing cap 3 is concave, and is in clearance fit with the side end face boss of the upper guide wheel body 41. The inner hole of the upper guide wheel body 41 is designed as a concave structure, and the upper guide wheel body 41 is rigidly assembled with the upper guide wheel rotating bearing 42. The other side end face of the upper guide wheel body 41 is also provided with a boss, and the end face of the upper guide wheel protection compression end cover 43 is in the form of a groove, which is in clearance fit with the boss of the end face of the upper guide wheel body 41. The boss of the end face of the upper guide wheel body 41 is clearance fitted and embedded in the end face groove of the upper guide wheel bearing protection compression end cover 43.

[0064] In some embodiments, the guide plate 1 is in the form of a single-piece torsion structure, one end of the guide plate 1 is provided with the transmission component 2 and is assembled and adhered to the chain extractor assembly surface 61, the other end of the guide plate 1 is provided with a mounting hole for assembling the first lower guide wheel bearing protection compression end cover 52, and the turning area of the guide plate 1 is designed with a chain constraint structure.

[0065] In some embodiments, the mounting hole of the guide plate 1 at one end of the transmission component 2 is a through hole or a threaded structure, and a protruding or recessed assembly structure is adopted.

[0066] In some embodiments, the transmission component 2 is installed at one end of the guide plate 1 and is compressed by using the transmission component fixing cap 3, and the compression mechanism is in the form of a thread.

[0067] In some embodiments, the side end face of the transmission component fixing cap 3 is concave.

[0068] In some embodiments, one end of the transmission component 2 is provided with a shaft stop for assembling the upper guide wheel rotating bearing 42, and the upper guide wheel 4 is installed on the shaft stop for assembling the upper guide wheel rotating bearing 42.

[0069] In some embodiments, one side of the upper guide wheel protection compression end cover 43 is in the form of a groove, and the other side is in the form of an external thread.

[0070] In some embodiments, one end of the transmission component 2 is also provided with an internal threaded hole, and the external thread of the upper guide wheel protection compression end cover is assembled with the threaded hole to fix the upper guide wheel 4 on the transmission component 2.

[0071] In some embodiments, the inner hole of the upper guide wheel body 41 is designed as a concave structure, and the upper guide wheel rotating bearing 42 is assembled in the concave position in a manner of interference fit.

[0072] In some embodiments, the inner hole of the lower guide wheel body 51 is in the form of an L-shaped cross-section structure, the lower guide wheel rotating bearing 53 is embedded in the inner hole of the lower guide wheel body, the inner hole of the lower guide wheel rotating bearing 53 is in fit with the outer circle of the first lower guide wheel bearing protection compression end cover 52, the second lower guide wheel protection compression end cover 54 compresses the end face of the lower guide wheel rotating bearing 53, and is fixed on the mounting surface at the other end of the guide plate 1.

[0073] In some embodiments, the mounting hole for assembling the other end of the guide plate 1 with the first lower guide pulley bearing protection compression end cover 52 is in the form of a threaded hole or a through hole.

[0074] In some embodiments, the guide plate 1 is provided with a plurality of positioning holes 11 for positioning the derailleur tension spring, a rotating positioning hole 12 for limiting the derailleur, and a first anti-drop chain baffle structure 13 feature.

[0075] In some embodiments, the lower guide pulley body 51 is also provided with a second anti-drop chain baffle structure 511 feature on the end face, and the lower guide pulley 5 adopts a large hollow structure, and the pattern of the second anti-drop chain baffle structure 511 on the end face of the lower guide pulley body 51 can be freely changed.

[0076] In some embodiments, the materials of the upper guide pulley body 41 and the lower guide pulley body 51 are metal, carbon fiber, composite material, ceramic or plastic.

[0077] Compared with the prior art, due to the improvement of the form of the guide plate 1, the single-piece turning structure form is adopted, the overall weight of the chain guide assembly is reduced, and the strength of the guide plate 1 is strengthened. At the same time, the inner hole of the upper guide pulley body 41 is designed as a concave structure to constrain the upper guide pulley rotating bearing 42 to be stably fixed in the upper guide pulley body 41, so that the bearing cannot move longitudinally, and the positioning precision of the speed change is improved. The upper guide pulley body 41 and the upper guide pulley rotating bearing 42 are rigidly assembled, the assembly gap error is reduced, the upper guide pulley rotating bearing 42 can be rigidly fixed in the upper guide pulley body 41, and the displacement precision and the following response time of the chain guide assembly are greatly improved, and the response time and the stability of the speed change are improved.

[0078] Secondly, by changing the structure form of the upper guide pulley body 41 and the upper guide pulley bearing protection compression end cover 43, the end face of the upper guide pulley body 41 is provided with a boss, the end face of the transmission component fixing cap 3 is a concave structure, and the end face of the upper guide pulley bearing protection compression end cover 43 on the other side is a groove form. The end face concave structure of the transmission component fixing cap 3 and the end face concave structure of the upper guide pulley bearing protection compression end cover 43 are gap assembled on both sides of the end face boss of the upper guide pulley body 41. This form effectively avoids or reduces the entry of environmental pollutants such as mud and rainwater into the guide pulley system, makes the speed change process more safe and reliable, and greatly improves the speed change transmission stability and safety during riding.

[0079] In addition, compared with the conventional diameter guide wheel rotating bearing, the lower guide wheel 5 adopts a hollow structure driven by the enlarged diameter guide wheel rotating bearing, the enlarged diameter guide wheel rotating bearing makes the lower guide wheel have a smaller yawing error, reduces the lateral yawing clearance of the lower guide wheel 5, improves the guiding stability of the lower guide wheel 5 during system operation, enables the lower guide wheel body 51 to be stably fixed on the guide plate 1, reduces the chain bounce amplitude, and compared with the conventional diameter guide wheel rotating bearing, the enlarged diameter guide wheel rotating bearing can generate greater rotational inertia, during the cruising riding process, the rotational inertia drives the chain to work, so that the rider can obtain a more convenient and comfortable riding feeling. Moreover, the structure pattern of the chain drop prevention baffle on the end face of the lower guide wheel body can be freely selected and replaced, different patterns can obtain different aerodynamic effects, visual experiences, or variable speed system requirement orientations of protection reliability, etc., so as to be suitable for use in different road condition scenes such as leisure riding, mountain off-road, daily training or racing, etc., so that the variable speed system not only can obtain the optimal working condition during operation, but also can provide different road condition scene use experiences.

[0080] It should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A new chain guide assembly for bicycle derailleur characterized in that, The guide plate, transmission component, transmission component fixing cap, upper guide wheel, and lower guide wheel; The upper guide wheel includes an upper guide wheel body, an upper guide wheel rotating bearing, and an upper guide wheel bearing protection compression end cover; The lower guide wheel includes a lower guide wheel body, a first lower guide wheel bearing protection compression end cover, a lower guide wheel rotating bearing, and a second lower guide wheel bearing protection compression end cover; The guide plate is a single-piece torsion structure, and the transmission component is assembled with the chain shifter; The transmission component is arranged on one side of the upper end of the guide plate, the upper guide wheel is fixed on the other side of the upper end of the guide plate, and the lower guide wheel is fixed on the lower end of the guide plate and opposite to the upper guide wheel; The upper guide wheel body is provided with an inner hole, the inner hole is a concave structure, the upper guide wheel rotating bearing is assembled in the inner hole, and rigid interference assembly is adopted; The two side end faces of the upper guide wheel body are provided with bosses, one side end face of the transmission component fixing cap is a concave structure, and clearance fit is adopted between the boss of one side end face of the upper guide wheel body and the transmission component fixing cap; The end face of the upper guide wheel protection compression end cover is a groove structure, and clearance assembly is adopted between the boss of the other side end face of the upper guide wheel body and the upper guide wheel protection compression end cover.

2. A novel chain guide assembly for a bicycle derailleur as defined in claim 1, characterized in that, The transmission component adopts a movable rotating shaft or a positioning seat; The transmission component fixing cap adopts a movable rotating shaft fixing cap or a positioning seat fixing cap; The transmission component uses the transmission component fixing cap for compression.

3. A novel chain guide assembly for a bicycle derailleur as defined in claim 2, wherein, The chain shifter is provided with an assembly surface, and the transmission component is assembled and attached to the assembly surface; The other end of the guide plate is provided with a mounting hole for assembly with the first lower guide wheel bearing protection compression end cover, and the mounting hole adopts a threaded structure or a through hole structure; The turning area of the guide plate is provided with a chain constraint structure.

4. A novel chain guide assembly for a bicycle derailleur as defined in claim 3, wherein, One end of the guide plate is connected with the transmission component through a mounting hole, and the connection adopts a protruding assembly structure or a recessed assembly structure; The mounting hole is a through hole structure or a threaded structure.

5. A novel chain guide assembly for a bicycle derailleur as defined in claim 4, wherein, One end of the transmission component is provided with a shaft stop, and the shaft stop is assembled with the upper guide wheel rotating bearing.

6. A novel chain guide assembly for a bicycle derailleur as defined in claim 5, wherein, One side of the upper guide wheel protection compression end cover is a groove structure, and the other side is an external thread structure, one end of the transmission component is provided with an internal thread hole; The external thread is assembled with the internal thread hole to fix the upper guide wheel on the transmission component.

7. A novel chain guide assembly for a bicycle derailleur as defined in claim 6, wherein, The lower guide wheel body is provided with an inner hole, the inner hole of the lower guide wheel body is an L-shaped cross-section structure, and the lower guide wheel rotating bearing is embedded in the inner hole of the lower guide wheel body; The inner hole of the lower guide wheel rotating bearing cooperates with the outer circle of the first lower guide wheel bearing protection compression end cover, the second lower guide wheel protection compression end cover compresses the end face of the lower guide wheel rotating bearing, and is fixed on the mounting surface of the other end of the guide plate.

8. A novel chain guide assembly for a bicycle derailleur as defined in claim 7, wherein, The guide plate is provided with a plurality of positioning holes for positioning with the tension spring of the chain shifter; The guide plate is provided with a rotating positioning hole for rotating limiting with the chain shifter; The guide plate is provided with a first anti-chain falling baffle structure.

9. A novel chain guide assembly for a bicycle derailleur as defined in claim 8, wherein, The lower guide wheel adopts a large hollow structure, and the end face of the lower guide wheel body is provided with a second anti-chain falling baffle structure.

10. A novel chain guide assembly for a bicycle derailleur as claimed in any one of claims 1 to 9, characterized in that, The main materials of the upper guide wheel body and the lower guide wheel body are metal, carbon fiber, composite material, ceramic, or plastic.

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