Mechanical control mechanism of derailleur and bicycle

Abstract

The derailleur mechanical control mechanism comprises a shell, a wire spool, a gear structure, a gear shifting rod, a gear shifting pawl and a positioning pawl, the wire spool can wind a gear shifting wire in the second rotating direction, a gear shifting tooth set comprises an initial gear shifting face and a plurality of gear shifting teeth, and the initial gear shifting face is connected with the gear shifting rod. The positioning ratchet set comprises an initial positioning face and a plurality of positioning ratchets, and when the wire spool rotates in the second rotating direction by a central angle corresponding to an arc formed between the initial positioning face and the first positioning ratchet or a pitch angle of every two adjacent positioning ratchets, the initial positioning face and the first positioning ratchet rotate in the second rotating direction. And the central angles corresponding to the circular arcs formed between the gear shifting pawls and the gear shifting teeth closest to the first rotating direction are kept consistent. According to the gear shifting mechanism, the corresponding relation between the gear shifting tooth set and the positioning ratchet set is ingeniously designed, even if the tooth pitch angle is small, the tooth skipping phenomenon does not occur when the gear shifting pawl resets, and even if the machining accuracy is insufficient, the clamping phenomenon does not occur when the gear shifting pawl resets.

Description

Technical Field

[0001] The invention relates to the technical field of bicycles, and in particular to a derailleur mechanical control mechanism and a bicycle. Background Art

[0002] Bicycle derailleurs are widely used, and their control methods can be divided into electronic speed control and mechanical speed control. Among them, mechanical speed control is mainly manual and finger shifting. The core of manual or finger shifting with gear shifting and positioning is that the positioning ratchet on the positioning gear is restrained by the positioning pawl to stop retreating, and the gear shifting teeth on the gear shifting gear are moved by the gear shifting pawl, so that the gear shifting gear, the positioning gear and the winding disk rotate at the same time. The winding disk rotates at least the pitch angle of the two adjacent positioning ratchets on the positioning gear each time, and then winds and pulls the shift cable of the chain shifter to realize the chain shifting on different flywheels. Since the minimum angle that the winding disk needs to rotate for each shift is determined by the specific distance required for each shift of the chain shifter, the pitch angle of any two adjacent positioning ratchets on the positioning gear is different.

[0003] At present, the pitch angles of the first and second gear teeth on the gear shift gear are usually designed to be equal to the pitch angles of the first and second positioning ratchets on the positioning gear, and by analogy, the pitch angles of the N+1th and N+2th gear shift teeth are designed to be equal to the pitch angles of the N+1th and N+2th positioning ratchets. In this way, when the pitch angle is small, the gear shift pawl is prone to skipping when resetting, that is, the gear shift pawl slides over at least one gear shift tooth, resulting in the pitch angles of the subsequent gear shift gear and the positioning gear not matching; if the machining accuracy is insufficient, the gear shift pawl may also be stuck when resetting, that is, the gear shift pawl cannot smoothly slide over the next gear shift tooth, affecting the subsequent gear shifting operation. The above two phenomena will affect the efficiency of the speed change and the accuracy of the judgment, resulting in a poor gear shifting feel, which is extremely disadvantageous for riders who need to accurately control the riding speed. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a derailleur mechanical control mechanism, which can reduce the phenomenon of gear-shifting pawl jumping or jamming during gear-shifting operation.

[0005] The present invention also provides a bicycle having the above-mentioned derailleur mechanical control mechanism.

[0006] The derailleur mechanical control mechanism according to the first aspect of the present invention has a first rotation direction and a second rotation direction that are opposite, and includes: a housing provided with a first pivot; a cable drum, rotatably connected to the housing via the first pivot, the cable drum being capable of winding a shift cable along the second rotation direction, a first elastic reset member being provided between the cable drum and the housing, the first elastic reset member being configured to apply a torque rotating along the first rotation direction to the cable drum; a gear structure, fixedly mounted on the cable drum, a shift tooth group and a positioning ratchet group being provided on the periphery of the gear structure, the shift tooth group including an initial shift surface and a plurality of shift teeth sequentially arranged at intervals along the first rotation direction, the positioning ratchet group including an initial positioning surface and a plurality of positioning ratchet teeth sequentially arranged at intervals along the first rotation direction, a pitch angle between a first shift tooth and a second shift tooth being equal to a center angle corresponding to a circular arc formed between the initial positioning surface and the first positioning ratchet tooth, a tooth pitch angle between an N+1th shift tooth and an N+2th shift tooth being equal to a center angle corresponding to a circular arc formed between the initial positioning surface and the first positioning ratchet tooth, and ... The pitch angle is equal to the pitch angle between the Nth positioning ratchet and the N+1th positioning ratchet, where N is a positive integer; a shift lever is connected to the housing through the first pivot rotation, and the shift lever can be actuated to rotate along the second rotation direction; a shift pawl is arranged on the shift lever, and the shift pawl is configured to be inserted between the initial shift surface and the first shift tooth in an initial state, and the center angle corresponding to the arc formed between the shift pawl and the first shift tooth is smaller than the pitch angle of any two adjacent shift teeth; a positioning pawl is arranged on the housing, and the positioning pawl is configured to clamp the initial positioning surface and prevent the winding drum from rotating along the first rotation direction in an initial state; whenever the winding drum rotates along the second rotation direction, the center angle corresponding to the arc formed between the initial positioning surface and the first positioning ratchet or the pitch angle of two adjacent positioning ratchets, the center angle corresponding to the arc formed between the shift pawl and the shift tooth closest to the first rotation direction remains consistent.

[0007] At least the following beneficial effects are achieved: the mechanism cleverly designs the corresponding relationship between the gear shifting tooth group and the positioning ratchet tooth group, and designs the pitch angle between the first gear shifting tooth and the second gear shifting tooth to be equal to the center angle of the arc formed between the initial positioning surface and the first positioning ratchet tooth, and the pitch angle between the N+1th gear shifting tooth and the N+2th gear shifting tooth to be equal to the pitch angle between the Nth positioning ratchet tooth and the N+1th positioning ratchet tooth, so that whenever the winding disk rotates along the second rotation direction at the center angle of the arc formed between the initial positioning surface and the first positioning ratchet tooth or the pitch angle of two adjacent positioning ratchets, the center angle of the arc formed between the gear shifting pawl and the gear shifting tooth closest to the first rotation direction remains consistent Due to this constant angular distance, even when encountering a small pitch angle, the gear feed pawl will not jump when it resets, preventing the gear feed pawl from sliding over the gear feed teeth too much. Moreover, since the center angle of the arc formed between the gear feed pawl and the first gear feed tooth is smaller than the pitch angle of any two adjacent gear feed teeth, the gear feed pawl is not prone to jamming when it resets and can slide over the next gear feed tooth smoothly. By designing the center angle of the arc formed between the gear feed pawl and the first gear feed tooth to be smaller, even if the machining accuracy is insufficient, the gear feed pawl will not jam when it resets, thereby ensuring the consistency of the gear feed pawl cutting into the gear feed tooth group each time during the gear shift operation.

[0008] According to some embodiments of the present invention, the maximum angle by which the shift lever can be actuated to rotate along the second rotation direction is greater than a pitch angle between any two adjacent shift teeth.

[0009] According to some embodiments of the present invention, the pitch angles of all two adjacent shift teeth are at least partially unequal.

[0010] According to some embodiments of the present invention, the pitch angles of all two adjacent shift teeth are not equal.

[0011] According to some embodiments of the present invention, the number of the shift teeth is consistent with the number of the positioning ratchet teeth.

[0012] According to some embodiments of the present invention, a second elastic return member is arranged between the shift selector lever and the housing, and the second elastic return member is configured to apply a torque to the shift selector lever to rotate along the first rotation direction. When the shift selector lever is actuated in the initial position to rotate along the second rotation direction to a preset minimum shift angle, the shift selector pawl pushes the initial shift surface to rotate the winding drum along the second rotation direction, and the positioning pawl slides over the first positioning ratchet and is inserted between the first positioning ratchet and the second positioning ratchet. When the shift selector lever is deactivated and rotates back to the initial position along the first rotation direction under the action of the second elastic return member, the winding drum rotates along the first rotation direction under the action of the first elastic return member until the first positioning ratchet is stuck by the positioning pawl, and the shift selector pawl slides over the first shift tooth along the first rotation direction and is inserted between the first shift tooth and the second shift tooth.

[0013] According to some embodiments of the present invention, the shift lever is provided with a second pivot, the shift pawl is rotatably connected to the shift lever via the second pivot, a third elastic return member is provided between the shift pawl and the shift lever, and the third elastic return member is configured to apply an elastic force to the shift pawl in the direction of the shift tooth group.

[0014] According to some embodiments of the present invention, the shell is provided with a third pivot, the positioning pawl is rotatably connected to the shell via the third pivot, a fourth elastic reset member is provided between the positioning pawl and the shell, and the fourth elastic reset member is configured to apply an elastic force to the positioning pawl in the direction of the positioning ratchet group.

[0015] According to some embodiments of the present invention, the gear structure includes a shift gear and a positioning gear, the shift gear group is arranged on the outer periphery of the shift gear, the positioning ratchet group is arranged on the outer periphery of the positioning gear, the winding disk is provided with a winding portion, and the winding portion can wind the shift wire along a second rotation direction, and the positioning gear is closer to the winding portion relative to the shift gear.

[0016] A bicycle according to a second aspect of the present invention comprises a handlebar and a derailleur mechanical control mechanism according to the first aspect of the present invention, wherein the housing is disposed on the handlebar.

[0017] At least the following beneficial effects are achieved: the bicycle has all the beneficial effects brought about by the above-mentioned derailleur mechanical control mechanism, which will not be described repeatedly here.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 The internal structure of the embodiment of the present invention is shown in FIG. Figure 1 ; Figure 3 The internal structure of the embodiment of the present invention is shown in FIG. Figure 2 ; Figure 4 The internal structure of the embodiment of the present invention is shown in FIG. Figure 3 ; Figure 5 Schematic diagram of the cooperation between the shift lever and the shift pawl in the embodiment of the present invention; Figure 6 A schematic diagram of the coordination between the winding drum and the gear structure in an embodiment of the present invention; Figure 7 is a schematic diagram of an embodiment of the present invention in an initial state; Figure 8 It is a schematic diagram of an embodiment of the present invention when the first positioning ratchet is stuck by the positioning pawl.

[0020] Figure numbers: housing 1, first pivot 11, third pivot 12, winding reel 2, winding part 21, gear structure 3, shift gear 3a, positioning gear 3b, shift gear group 31, initial shift surface 311, shift tooth 312, first shift tooth 312a, second shift tooth 312b, positioning ratchet group 32, initial positioning surface 321, positioning ratchet 322, first positioning ratchet 322a, second positioning ratchet 322b, shift lever 4, second pivot 41, shift pawl 5, positioning pawl 6, shift cable 7, first elastic reset member 8, second elastic reset member 9, third elastic reset member 10, fourth elastic reset member 13, clamp ring 14. DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it is necessary to understand that the descriptions involving orientations, such as the first rotation direction, the second rotation direction, clockwise, counterclockwise, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present invention, if there are descriptions of the first, second, Nth, N+1th, and N+2th, they are only used to distinguish the technical features and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Reference Figures 1 to 8 The present invention discloses a derailleur mechanical control mechanism having opposite first and second rotation directions, comprising a housing 1, a winding disc 2, a gear structure 3, a shift lever 4, a shift pawl 5 and a positioning pawl 6.

[0026] Reference Figure 2 The housing 1 is provided with a first pivot 11, and the winding disc 2 is rotatably connected to the housing 1 via the first pivot 11. The winding disc 2 can wind the shift cable 7 along the second rotation direction. It can be understood that the winding disc 2 winds and pulls the shift cable 7 of the derailleur along the second rotation direction, so that the chain is shifted on different flywheels to realize the gear shifting operation.

[0027] Among them, a first elastic return member 8 is arranged between the winding reel 2 and the shell 1. The first elastic return member 8 can be a coil spring, a torsion spring or other spring structures. The first elastic return member 8 is configured to apply a torque to the winding reel 2 along the first rotation direction, so that the winding reel 2 has a tendency to rotate along the first rotation direction.

[0028] Reference Figure 3 , Figure 4 and Figure 6 The gear structure 3 is fixedly mounted on the winding reel 2, and an advance gear group 31 and a positioning ratchet group 32 are arranged on the periphery of the gear structure 3. The advance gear group 31 includes an initial advance gear surface 311 and a plurality of advance gears 312 arranged in sequence along the first rotation direction, and the positioning ratchet group 32 includes an initial positioning surface 321 and a plurality of positioning ratchet teeth 322 arranged in sequence along the first rotation direction.

[0029] It should be noted that the initial feed surface 311 and the initial positioning surface 321 are planar structures, which can be part of the tooth surface or a non-tooth surface structure respectively, wherein the initial feed surface 311 can meet the requirement that when being abutted by the feed pawl 5 and pushed along the second rotation direction, it will not be separated from the feed pawl 5 and can drive the winding drum 2 to rotate; the initial positioning surface 321 can clamp the positioning pawl 6 in the initial state to prevent the winding drum 2 from rotating along the first rotation direction.

[0030] In the design of the corresponding relationship between the shift gear group 31 and the positioning ratchet group 32, the pitch angle between the first shift gear 312a and the second shift gear 312b is equal to the center angle of the arc formed between the initial positioning surface 321 and the first positioning ratchet 322a, and so on, the pitch angle between the N+1th shift gear and the N+2th shift gear is equal to the pitch angle between the Nth positioning ratchet and the N+1th positioning ratchet, where N is a positive integer. It can be understood that the pitch angle refers to the center angle of the arc formed between two teeth, specifically the center angle of the arc formed between the tooth profiles on the same side of the two teeth, the center angle of the arc formed between the initial positioning surface 321 and the first positioning ratchet 322a, specifically the center angle of the arc formed between the tooth surface on one side of the first positioning ratchet 322a that can clamp the positioning pawl 6 and the initial positioning surface 321.

[0031] Since the minimum rotation angle of the winding drum 2 for each gear shift is determined by the specific distance required for each gear shift of the derailleur, generally speaking, the pitch angles of all adjacent gear shift teeth 312 are at least partially unequal. However, if the derailleur is designed so that the distance required for each gear shift is equal, the pitch angles of all adjacent gear shift teeth 312 can also be equal.

[0032] Reference Figure 5 The shift lever 4 is rotatably connected to the housing 1 via the first pivot 11, and the shift lever 4 can be actuated to rotate along the second rotation direction. The shift pawl 5 is disposed on the shift lever 4. The shift pawl 5 is configured to be inserted between the initial shift surface 311 and the first shift tooth 312a in the initial state, and the central angle of the arc formed between the shift pawl 5 and the first shift tooth 312a is smaller than the pitch angle of any two adjacent shift teeth 312. It can be understood that the shift pawl 5, as a pawl structure, can slide over the shift tooth 312 relative to the winding drum 2 along the first rotation direction when resetting.

[0033] Reference Figure 4The positioning pawl 6 is arranged on the shell 1. The positioning pawl 6 is configured to clamp the initial positioning surface 321 in the initial state and prevent the winding reel 2 from rotating along the first rotation direction. It can be understood that the positioning pawl 6, as a pawl structure, can slide over the positioning ratchet 322 relative to the winding reel 2 along the first rotation direction when resetting.

[0034] Reference Figure 7 and Figure 8 Whenever the winding drum 2 rotates along the second rotation direction, the central angle of the arc formed between the initial positioning surface 321 and the first positioning ratchet tooth 322a or the pitch angle of two adjacent positioning ratchet teeth 322, the central angle of the arc formed between the shift-input pawl 5 and the shift-input tooth 312 closest to the first rotation direction is kept consistent. It should be noted that the arc formed between the shift-input pawl 5 and the shift-input tooth 312 refers to the arc formed between the tooth root center line of the shift-input tooth 312 and the tip of the shift-input pawl 5.

[0035] For the convenience of explanation, take the first rotation of the winding drum 2 as an example, referring to Figure 7 and Figure 8 , when the winding drum 2 rotates along the second rotation direction by the central angle of the arc formed between the initial positioning surface 321 and the first positioning ratchet tooth 322a, since the pitch angle between the first feed tooth 312a and the second feed tooth 312b is equal to the central angle of the arc formed between the initial positioning surface 321 and the first positioning ratchet tooth 322a, it is equivalent to the winding drum 2 rotating along the second rotation direction by the pitch angle between the first feed tooth 312a and the second feed tooth 312b. If the housing 1 or the feed pawl 5 is used as a reference, that is, the second feed tooth 312b is at the original position of the first feed tooth 312a, so, Figure 8 The central angle of the arc formed between the shift-in pawl 5 and the second shift-in tooth 312b corresponds to Figure 7 The central angle of the arc formed between the shift-in pawl 5 and the first shift-in tooth 312a is consistent.

[0036] The mechanism cleverly designs the correspondence between the shift gear set 31 and the positioning ratchet set 32. Since a constant angular distance is always maintained between the shift gear pawl 5 and the shift gear tooth 312 closest to the first rotation direction, even when a smaller pitch angle is encountered, the shift gear pawl 5 will not jump when resetting, thereby preventing the shift gear pawl 5 from sliding over the shift gear tooth 312.

[0037] Since the central angle of the arc formed between the feed pawl 5 and the first feed tooth 312a is smaller than the pitch angle of any two adjacent feed teeth 312, the feed pawl 5 is not prone to getting stuck when it is reset and can smoothly slide over the next feed tooth 312. By designing the central angle of the arc formed between the feed pawl 5 and the first feed tooth 312a to be smaller, the feed pawl 5 will not get stuck when it is reset even if the processing accuracy is insufficient, thereby ensuring the consistency of the feed pawl 5 cutting into the feed tooth group 31 each time during the gear shifting operation.

[0038] In order to facilitate the driver's shifting operation, the driver usually actuates the shift lever 4, and the shift pawl 5 can push the winding drum 2 to rotate two or more shift teeth 312 at one time to achieve a single-stage or multi-stage shifting operation. Figures 6 to 8 In order to ensure that the driver can at least achieve a single-stage shift each time he actuates the shift lever 4 , the maximum angle at which the shift lever 4 can be actuated to rotate along the second rotation direction is greater than the pitch angle of any two adjacent shift teeth 312 .

[0039] In some embodiments, reference Figure 6 , the pitch angles of all two adjacent gear teeth 312 are at least partially unequal, which is beneficial to the design of the derailleur, so that the mechanism can adapt to different combinations of flywheels, and even in some embodiments, the pitch angles of all two adjacent gear teeth 312 are unequal. Figure 6 The number of the advance teeth 312 can be consistent with the number of the positioning ratchet teeth 322, forming a one-to-one correspondence.

[0040] Reference Figure 1 , Figure 4 and Figure 5 In some embodiments, a second elastic reset member 9 is provided between the shift lever 4 and the housing 1. The second elastic reset member 9 may be a torsion spring, a coil spring or other spring structures. The second elastic reset member 9 is configured to apply a torque rotating along the first rotation direction to the shift lever 4, so that the shift lever 4 has a tendency to rotate along the first rotation direction, ensuring that when the driver releases the actuation of the shift lever 4, the shift lever 4 can automatically return to the initial position so that the driver can perform the next shift operation.

[0041] The initial position is Figure 7As shown, when the shift lever 4 is actuated in the initial position to rotate along the second rotation direction to a preset minimum shift angle, the shift pawl 5 pushes the initial shift surface 311 to rotate the winding drum 2 along the second rotation direction, and the positioning pawl 6 slides over the first positioning ratchet tooth 322a and inserts between the first positioning ratchet tooth 322a and the second positioning ratchet tooth 322b. When the shift lever 4 is deactivated and rotated back to the initial position along the first rotation direction under the action of the second elastic return member 9, the winding drum 2 rotates along the first rotation direction under the action of the first elastic return member 8 until the first positioning ratchet tooth 322a is stuck by the positioning pawl 6, as shown in FIG. Figure 8 As shown, the shift-in pawl 5 slides over the first shift-in tooth 312a along the first rotation direction and is inserted between the first shift-in tooth 312a and the second shift-in tooth 312b. It can be understood that the preset minimum shift-in angle refers to a single-stage shift-in angle.

[0042] Reference Figure 4 and Figure 5 In some embodiments, the shift lever 4 is provided with a second pivot 41, and the shift lever 4 is rotatably connected to the shift lever 4 via the second pivot 41. A third elastic reset member 10 is provided between the shift lever 5 and the shift lever 4. The third elastic reset member 10 can be a torsion spring, a compression spring, a tension spring or other spring structures. The third elastic reset member 10 is configured to apply an elastic force to the shift lever 5 in the direction of the shift tooth group 31, which can not only ensure that the shift lever 4 will not jump out of the shift tooth group 31 when pushing the initial shift surface 311 or the shift tooth 312, but also ensure that the shift lever 4 is always pressed against the shift tooth group 31 when resetting along the first rotation direction, and can smoothly slide over the shift tooth 312.

[0043] In some embodiments, reference Figure 2 and Figure 3 The shell 1 is provided with a third pivot 12, and the positioning pawl 6 is rotatably connected to the shell 1 through the third pivot 12. A fourth elastic reset member 13 is provided between the positioning pawl 6 and the shell 1. The fourth elastic reset member 13 can be a torsion spring, a compression spring, a tension spring or other spring structures. The fourth elastic reset member 13 is configured to apply an elastic force to the positioning pawl 6 in the direction of the positioning ratchet group 32, which can not only ensure that the positioning pawl 6 will not jump out of the positioning ratchet group 32 when it is stuck by the initial positioning surface 321 or the positioning ratchet 322, but also ensure that the positioning ratchet 322 can smoothly slide over the positioning pawl 6 along the second rotation direction.

[0044] The gear structure 3 can specifically be a single gear structure, a portion of the outer periphery of the single gear structure is a shift gear group 31, and a portion is a positioning ratchet group 32. In some embodiments, the gear structure 3 can also be a double gear structure, including a shift gear 3a and a positioning gear 3b. The shift gear group 31 is arranged on the outer periphery of the shift gear 3a, and the positioning ratchet group 32 is arranged on the outer periphery of the positioning gear 3b. The winding disk 2 is provided with a winding portion 21, and the winding portion 21 can wind the shift wire 7 along the second rotation direction. The positioning gear 3b is closer to the winding portion 21 relative to the shift gear 3a.

[0045] The present invention also discloses a bicycle, comprising a handlebar and the derailleur mechanical control mechanism of the above embodiment, wherein the housing 1 is arranged on the handlebar. The bicycle has all the beneficial effects brought by the above derailleur mechanical control mechanism, which will not be described repeatedly here.

[0046] In some embodiments, reference Figure 1 A clamp ring 14 is installed on the housing 1, and the clamp ring 14 can be installed on the handlebar.

[0047] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A derailleur mechanical control mechanism, characterized in that: Having opposite first and second rotation directions, comprising: A housing is provided with a first pivot; A winding disk, rotatably connected to the housing via the first pivot, the winding disk being capable of winding the shift wire along a second rotation direction, a first elastic reset member being provided between the winding disk and the housing, the first elastic reset member being configured to apply a torque to the winding disk rotating along the first rotation direction; A gear structure, fixedly mounted on the winding disk, wherein an advance gear group and a positioning ratchet group are arranged on the periphery of the gear structure, wherein the advance gear group comprises an initial advance gear surface and a plurality of advance gear teeth sequentially spaced along a first rotation direction, and the positioning ratchet group comprises an initial positioning surface and a plurality of positioning ratchet teeth sequentially spaced along the first rotation direction, wherein a pitch angle between a first advance gear tooth and a second advance gear tooth is equal to a central angle corresponding to an arc formed between the initial positioning surface and the first positioning ratchet tooth, and a pitch angle between an N+1th advance gear tooth and an N+2th advance gear tooth is equal to a pitch angle between an Nth positioning ratchet tooth and an N+1th positioning ratchet tooth, and N is a positive integer; a shift lever, rotatably connected to the housing via the first pivot, the shift lever being capable of being actuated to rotate along a second rotation direction; A shift-in pawl is arranged on the shift-in lever, wherein the shift-in pawl is configured to be inserted between the initial shift-in surface and the first shift-in tooth in an initial state, and a central angle of a circular arc formed between the shift-in pawl and the first shift-in tooth is smaller than a pitch angle of any two adjacent shift-in teeth; A positioning pawl, disposed on the housing, wherein the positioning pawl is configured to clamp the initial positioning surface in an initial state and prevent the winding drum from rotating along a first rotation direction; Whenever the winding disk rotates along the second rotation direction, the center angle of the arc formed between the initial positioning surface and the first positioning ratchet or the pitch angle of two adjacent positioning ratchets, the center angle of the arc formed between the advance pawl and the advance tooth closest to the first rotation direction remains consistent.

2. The derailleur mechanical control mechanism according to claim 1, characterized in that: The maximum angle at which the shift lever can be actuated to rotate along the second rotation direction is greater than the pitch angle of any two adjacent shift teeth.

3. The derailleur mechanical control mechanism according to claim 1, characterized in that: The pitch angles of all two adjacent shift teeth are at least partially unequal.

4. The derailleur mechanical control mechanism according to claim 3, characterized in that: The pitch angles of all two adjacent shift teeth are not equal.

5. The derailleur mechanical control mechanism according to claim 1, characterized in that: The number of the shift teeth is consistent with the number of the positioning ratchet teeth.

6. The derailleur mechanical control mechanism according to any one of claims 1 to 5, characterized in that: A second elastic return member is arranged between the shift lever and the housing, and the second elastic return member is configured to apply a torque to the shift lever to rotate along the first rotation direction. When the shift lever is actuated in the initial position to rotate along the second rotation direction to a preset minimum shift angle, the shift pawl pushes the initial shift surface to rotate the winding drum along the second rotation direction, and the positioning pawl slides over the first positioning ratchet and is inserted between the first positioning ratchet and the second positioning ratchet. When the shift lever is deactivated and rotates back to the initial position along the first rotation direction under the action of the second elastic return member, the winding drum rotates along the first rotation direction under the action of the first elastic return member until the first positioning ratchet is stuck by the positioning pawl, and the shift pawl slides over the first shift tooth along the first rotation direction and is inserted between the first shift tooth and the second shift tooth.

7. The derailleur mechanical control mechanism according to claim 6, characterized in that: The shift lever is provided with a second pivot, the shift pawl is rotatably connected to the shift lever via the second pivot, a third elastic return member is provided between the shift pawl and the shift lever, and the third elastic return member is configured to apply an elastic force to the shift pawl toward the shift gear group.

8. The derailleur mechanical control mechanism according to claim 1, characterized in that: The shell is provided with a third pivot, the positioning pawl is rotatably connected to the shell via the third pivot, a fourth elastic reset member is provided between the positioning pawl and the shell, and the fourth elastic reset member is configured to apply an elastic force to the positioning pawl in the direction of the positioning ratchet group.

9. The derailleur mechanical control mechanism according to claim 1, characterized in that: The gear structure includes a shift gear and a positioning gear, the shift gear group is arranged on the outer periphery of the shift gear, the positioning ratchet group is arranged on the outer periphery of the positioning gear, the winding disk is provided with a winding portion, and the winding portion can wind the shift wire along the second rotation direction, and the positioning gear is closer to the winding portion than the shift gear.

10. A bicycle, characterized in that The invention comprises a handlebar and the derailleur mechanical control mechanism according to any one of claims 1 to 9, wherein the housing is arranged on the handlebar.

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