Bicycle gear shifter

Abstract

The utility model relates to a bicycle gear shifter, which is configured to be capable of adjusting the winding radius of a shift cable in the gear shifter so as to adjust the pulling and releasing strokes among gears of the shift cable. Therefore, the device is suitable for bicycles with different speed types (such as 6-speed bicycles, 11-speed bicycles and the like), and bicycles with different speeds have different chain wheel distances of flywheels or chain wheels and different shift line strokes during gear shifting). Compared with a conventional bicycle gear shifter, the bicycle gear shifter is characterized in that a gear shifting line is fixed to the circumferential face of a line winding wheel through a traditional gear shifter, and the line winding radius is fixed; according to the gear shifter, the gear shifting line is fixed to the line end fixing piece, then the line end fixing piece is installed on the winding outer surface of the line winding wheel, the cross sections, corresponding to different positions of the axis, of the winding outer surface have different diameters, and the line end fixing piece can linearly slide between the cross sections of the outer surface of the line winding wheel; therefore, the distance between the variable-speed cable and the axis of the cable winding wheel, namely the cable winding radius, is changed, and different cable winding radiuses are matched with bicycles of different speed types.

Description

Technical Field

[0001] The utility model relates to a shifter, in particular to a bicycle shifter. Background Art

[0002] Some bicycles are provided with a drive train having multiple sprockets, which allows a rider to select a specific sprocket for a particular situation. A bicycle speed change operating device is usually provided for the rider to manually change the sprockets of the drive train. This type of operating device is commonly referred to as a bicycle shifter and is used to operate a sprocket speed change mechanism (e.g., a derailleur or an internal hub sprocket mechanism) to select a desired gear ratio.

[0003] The bicycle shifter operating device for a bicycle drive device disclosed in Chinese Patent ZL03101086.5: 1. A bicycle shifting operating device, comprising: a first operating member; a cable winding mechanism, which is mounted on a first pivot at a first fixed position and is configured to be held in one of a plurality of shifting positions as selected; a follower link, the first end of which is pivotally coupled to the first operating member, and the second end of which is mounted on a second pivot at a second fixed position; and a control link, the first end of which is pivotally coupled to the first operating member, and the second end of which is mounted on the first pivot, the control link being operatively coupled to the cable winding mechanism so that the cable winding mechanism rotates between the shifting positions about the first pivot as the first operating member moves. 2. The bicycle shifting operating device according to claim 1, wherein the cable winding mechanism includes a cable winding member and a ratchet member mounted on the first pivot, and a locking member is operatively engaged with the ratchet member to hold the cable winding member in one of the plurality of shifting positions.

[0004] The bicycle speed change operating device disclosed in the Chinese authorized announcement number CN2555226 patent is used to link a speed change wire. This device includes: a mounting shell group fixed to a handlebar of a bicycle, having a first pivot part and a second pivot part; a winding module rotatably relative to the first pivot part of the mounting shell group under elastic force, having a first tooth section, a second tooth section and a third tooth section, and the winding module is for installing the speed change wire; a first lever is rotatably relative to the first pivot part of the mounting shell group under elastic force, having a pushing tooth part corresponding to engage with the third tooth section of the winding module to drive the winding module to rotate, and in the opposite direction, it can smoothly return and its pushing tooth part does not lock the third tooth section of the winding module; a second lever is pivotally arranged on the second pivot part of the mounting shell group under elastic force, having a resisting tooth part that can jump one tooth by one tooth to make the winding module rotate when the first lever shifts gears, and when the second lever rotates back and forth, it respectively engages with the first tooth section and the second tooth section of the winding module to make the winding module rotate back; for the bicycle speed change operating device, wherein the winding module includes a wire wheel and a first tooth part, and the first tooth section and the second tooth section of the winding module are formed on the first tooth part; for the bicycle speed change operating device, wherein the winding module includes a wire wheel and a second tooth part, and the third tooth section of the winding module is formed on the second tooth part, the wire wheel is installed on the first pivot part of the shell seat, having a wheel body and a wire fixing hole.

[0005] However, for the above-mentioned well-known bicycle speed change operating device, that is, the bicycle shifter, since the end of the speed change wire is directly fixed to the wire wheel. As described above, the wire wheel is installed on the first pivot part of the shell seat, having a wheel body and a wire fixing hole, that is, the winding radius is fixed. When the bicycle shifter operates to switch gears, the displacement stroke of the speed change wire is also fixed. Although it can change the transmission ratio of the bicycle, it can only be adapted to a certain speed type (the speed type is determined by the number of sprockets, and different speed type bicycles have different numbers of sprockets on the freewheel or chainring, and the sprocket spacing is also different) of bicycles of a certain manufacturer; due to different manufacturers and speed types, the flywheels, chainrings, and derailleurs equipped on mainstream 6-speed - 11-speed bicycles require the corresponding shifters to also be set to the corresponding speed change wire displacement stroke, resulting in a variety of models of shifters (different displacement strokes between speed change wire gears) on the market, which cannot be generally compatible with each other; when users have the need to change the speed type of their own bicycles, they need to replace the corresponding kits together, causing waste of social resources. For manufacturers, the parts market, and end repair shops, since different speed type bicycles require different bicycle shifters, they need to produce and stock bicycle shifters of different speed types, resulting in an increase in the risk of capital occupation and management costs. Summary of the Invention

[0006] In view of the above problems, the main object of the present utility model is to provide a general bicycle shifter. When the bicycle gear is switched, the displacement stroke of pulling or releasing the shift cable can be set to different values. It can be installed on adjustable transmission ratio bicycles of 6-speed type - 11-speed type (even in a larger range) commonly available on the market, and is adapted to the chainwheel transmission mechanism with different shift cable displacement stroke requirements.

[0007] To achieve the above object, a bicycle shifter provided by the present utility model is used to pull and release a shift cable connected to a derailleur coupled to a chainring or a freewheel of a bicycle, and includes: a fixed module, in which a fixed shaft is provided around a central axis, a winding module that can rotate around the fixed shaft and is biased in a certain direction by a torsion spring, a gear position limiting module, a tensioning module for pulling the shift cable, and a releasing module for releasing the shift cable. The characteristics are that: the winding module includes a winding wheel that rotates around the fixed shaft and a wire head fixing member. The winding wheel has a winding outer surface for winding the shift cable. The generatrix of the winding outer surface is not parallel to the axis of the winding outer surface. Cross-sections at different positions of the winding outer surface corresponding to the axis have different diameters. The head and a partial line part of the shift cable are fixedly arranged on the wire head fixing member. The winding wheel and the wire head fixing member are provided with corresponding guiding features and can linearly slide relative to each other on a plane including the generatrix and the axis, and the sliding direction is not parallel to the axis.

[0008] The wire head fixing member has a head pit for accommodating the head of the shift cable, a wire part hole for accommodating the wire part of the shift cable, and a wire part groove. The head pit, the wire part hole, and the wire part groove are configured to force the shift cable to fit on the winding outer surface. The center of the head pit, the center of the wire part hole, and the center of the wire part groove are coaxial or coplanar and perpendicular to the axis of the winding outer surface.

[0009] The bicycle shifter further includes: a switching dock module provided on the fixed module. The switching dock module has a wire passing hole through which the shift cable can pass. The center of the wire passing hole is coaxial or coplanar with the center of the wire part groove, the center of the wire part hole, and the center of the head pit, and the wire passing hole is located on the side close to the wire part groove.

[0010] A linear guiding feature is provided between the switching dock module and the fixed module and can linearly slide relative to each other. When the winding module rotates around the fixed shaft to the initial limit position under the action of the elastic force of the torsion spring, the gear position limiting module, and the releasing module, the linear sliding direction of the switching dock module relative to the fixed module is the same as the linear sliding direction of the wire head fixing member relative to the winding wheel.

[0011] The wire head fixing part and the switching dock module are provided with features that can cooperate with each other and partially accommodate. When the winding module is in the initial limit position, the switching dock module and the wire head fixing part partially accommodate and can linearly slide synchronously along the linear sliding direction of the wire head fixing part relative to the reel.

[0012] The described bicycle shifter further includes: a speed type adjusting bolt, which is pivotally connected to the fixed module and has an external thread feature.

[0013] The switching dock module is provided with a threaded hole that cooperates coaxially with the speed type adjusting bolt. When the winding module is in the initial limit position, the rotational movement of the speed type adjusting bolt can cause the switching dock module and the wire head fixing part to generate a linear motion, changing the position of the wire head fixing part relative to the reel.

[0014] Adopting the above technical solution, the present utility model changes the connection relationship between the shift cable and the winding module. In the traditional solution, the head of the shift cable is directly fixed to the wire wheel. In the present utility model, the shift cable is first fixedly arranged on the wire head fixing part, and the wire head fixing part can drive the shift cable to linearly slide on the plane containing the bus bar and the axis, and the sliding direction is not parallel to the axis; when the winding module rotates around the fixed axis to the initial limit position under the action of the elastic force of the torsion spring, the gear position limiting module and the release module, rotating the speed type adjusting bolt can drive the switching dock module to force the wire head fixing part to drive the shift cable to linearly slide relative to the reel along the sliding direction. Because the sliding direction is not parallel to the axis, the distance between the wire head fixing part and the shift cable to the axis of the reel is changed, and thus the radius of the winding shift cable of the bicycle shifter is changed, realizing the adjustability of different shift cable displacement strokes during gear shifting, enabling the present bicycle shifter to be compatible with bicycles of various speed types, achieving the universality of the shifter on bicycles with different speed type parameters, and saving social resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 and Figure 2 are three-dimensional combined views of different perspectives of the bicycle shifter provided by a preferred embodiment of the present utility model.

[0016] Figure 3 is a cross-sectional view of an embodiment of the bicycle shifter of the present utility model, and the cross-section contains the axis of the reel and the axis of the speed type adjusting bolt. At this time, the winding module rotates around the fixed axis to the initial limit position under the action of the elastic force of the torsion spring.

[0017] Figure 4 , Figure 5 is a combined view of some parts of an embodiment of the bicycle shifter of the present utility model.

[0018] Figure 6It is a partial part cross-sectional view of an embodiment of the bicycle shifter of the present utility model. The cutting plane includes the winding wheel axis and the speed type adjustment bolt axis. At this time, the winding module rotates around the fixed axis to the initial limit position under the elastic force of the torsion spring.

[0019] Figure 7 It is a partial part cross-sectional view of an embodiment of the bicycle shifter of the present utility model. The cutting plane includes the center of the wire part hole of the wire head fixing part and the viewing direction is the winding wheel axis direction. At this time, the winding module rotates around the fixed axis to the limit position under the elastic force of the torsion spring.

[0020] Figure 8 、 Figure 9 It is an assembly drawing of partial parts of an embodiment of the bicycle shifter of the present utility model.

[0021] Figure 10 It is an exploded perspective view of an embodiment of the bicycle shifter of the present utility model, where the upper cover module is not disassembled.

[0022] Figures 11 to 14 is Figure 10 An enlarged view of different parts.

[0023] Figure 15 It is an assembly drawing showing only the winding wheel, wire head fixing part, and ratchet of an embodiment of the bicycle shifter of the present utility model.

[0024] Figure 16 and Figure 17 It is an exploded view of different perspectives showing only the winding wheel, wire head fixing part, and ratchet of an embodiment of the bicycle shifter of the present utility model.

[0025] Figure 18 It is a cross-sectional view showing only the winding wheel and wire head fixing part of an embodiment of the bicycle shifter of the present utility model. The cutting plane includes the winding wheel axis and is perpendicular to the center line of the wire part hole of the wire head fixing part.

[0026] Figure 19 It is a cross-sectional view showing only the winding wheel and wire head fixing part of an embodiment of the bicycle shifter of the present utility model. The cutting plane includes the center line of the wire part hole of the wire head fixing part and is perpendicular to the winding wheel axis.

[0027] Figure 20 It is a top view of an embodiment of the bicycle shifter of the present utility model, showing the different gear states of some parts.

[0028] Figure 21 It is a bottom view of an embodiment of the bicycle shifter of the present utility model, showing an assembly drawing of some parts.

[0029] Figure 22 Shows a perspective view of the main substrate of an embodiment of the bicycle shifter of the present utility model.

[0030] List of reference numerals

[0031] Bicycle shifter 010; shift cable 910; shift cable head 911; shift cable body 912;

[0032] Reel 211; wire head fixing part 212; reel sleeve 213; track disc 214;

[0033] Switching dock module 220; switching dock 221; switching dock nut 222; speed type adjusting bolt 223;

[0034] Ratchet 231; positioning claw 232;

[0035] Main substrate 111; sub-substrate 112; guide post 113; guide post 114;

[0036] Bolt limit plate 115; fixed shaft 151; spacer washer 152; nut lock washer 153;

[0037] Fixed shaft nut 154;

[0038] Handle connection bracket 331; bracket screw 332; upper cover module 320; speed type window 162;

[0039] Lower cover 311; shift cable fine-tuning module 120;

[0040] Release module 240; release rod sleeve 241; release rod 242;

[0041] Tension rod sleeve 251; tension rod 252; tension claw 253; tension claw snap ring 254;

[0042] Tension claw torsion spring 255; tension rod cover 256; tension release torsion spring 745; reel torsion spring 712;

[0043] Shift cable sleeve 129; positioning claw torsion spring 713; rotation direction R.

[0044] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. Detailed implementation manners

[0045] In order to describe in detail the structure, characteristics and functions of the present utility model, the following preferred embodiments are given and described in conjunction with the accompanying drawings as follows.

[0046] As Figure 1 —— Figure 14As shown, the fixing module of the bicycle shifter 010 includes a base, an upper cover module 320, a lower cover 311, a speed type window 162, and a gear cable fine-tuning module 120. Each of the above modules is fixedly connected and fixedly connected to the bicycle handle through a handle connection bracket 331 and a bracket screw 332. The base includes a main substrate 111, a sub-substrate 112, guide posts 113, guide posts 114, and a bolt limiting plate 115, which are fixedly connected to each other. A fixing shaft 151 is fixedly arranged on the main substrate 111 and the sub-substrate 112 through a fixing shaft nut 154 and passes through a hole 1111 of the main substrate 111 and a hole 1121 of the sub-substrate 112. A hole 1112 of the main substrate 111 is coaxial with a rivet post 1123 of the sub-substrate 112.

[0047] As Figure 3 —— Figure 19 , especially Figure 15 —— Figure 19 and Figure 3 As shown, the winding module of the bicycle shifter 010 includes a winding wheel 211, a winding wheel sleeve 213, and a wire end fixing member 212. The winding wheel sleeve 213 is arranged in a hole 21101 of the winding wheel 211. The winding wheel sleeve 213 of the winding module is coaxially arranged with the fixing shaft 151 and can only rotate around the fixing shaft 151. At the same time, the axial direction is restricted by the main substrate 111 and the sub-substrate 112. There is a winding wheel torsion spring 712 between the winding wheel 211 and the sub-substrate 112, which biases a rotational movement trend in the R direction as Figure 7 shown in. As Figure 8 and Figure 15 shown, both ends of the winding wheel torsion spring 712 are respectively fixed to a groove 1127 of the sub-substrate 112 and a surface 2117 of the winding wheel 211. Without external force, the winding wheel 211 is biased, resulting in the feature 2115 on the winding wheel 211 as Figure 17 shown contacting the feature 1125 of the sub-substrate 112 as Figure 8 shown. When this occurs, the winding module rotates back to the initial limit position. The winding wheel 211 has at least two outer cylindrical surfaces with different diameters, forming a shape similar to a frustum of a cone. As Figure 16 shown, there are cylindrical surfaces 2111, 2112, and 2113. The gear cable wire part 912 of the gear cable 910 can be wound around these cylindrical surfaces.

[0048] As Figure 4 , Figure 7 , Figure 8 , Figure 9 , Figure 15 , Figure 20, the gear limit module of the bicycle shifter 010 includes a ratchet wheel 231, a positioning claw 232, partial features of the main substrate 111, partial features of the secondary substrate 112, partial features of the reel 211, and a positioning claw torsion spring 713. The ratchet wheel 231 is fixedly connected to the reel 211. The hole 2324 of the positioning claw 232 is coaxially arranged with the rivet post 1123 of the secondary substrate 112 and can only rotate relative to the axis of the rivet post 1123. A positioning claw torsion spring 713 is arranged between the positioning claw 232 and the secondary substrate 112 to provide a rotational movement tendency for the positioning claw 232 in the opposite direction of the bias R. When there is no external force, the positioning claw torsion spring 713 causes a partial feature of the positioning claw 232 to contact the feature surface 11123 of the main substrate 111 and be in the initial static position; as Figure 20 shown, there are multiple tension teeth on the ratchet wheel 231, such as tension teeth 23111, tension teeth 23112, etc., and there are also multiple limit tooth surfaces, such as limit tooth surfaces 23121, limit tooth surfaces 23122, etc. When the positioning claw 232 is in the initial static position, the feature surface 2321 of the positioning claw 232 contacts a certain limit tooth surface of the ratchet wheel 231, which can overcome the biasing force of the reel torsion spring 712 and cause the ratchet wheel 231 and the reel 211 to be stationary and fixed in a certain gear.

[0049] As Figure 3 , Figure 7 , Figure 12 , Figure 20 , Figure 21 , Figure 22 , the tension module of the bicycle shifter 010 includes a tension rod sleeve 251, a tension rod 252, a tension claw 253, a tension claw snap ring 254, a tension claw torsion spring 255, a tension rod cover 256, and a tension release torsion spring 745. Among them, the tension rod sleeve 251 and the tension rod cover 256 are fixedly connected to the tension rod 252; the release module 240 of the bicycle shifter 010 includes a release rod sleeve 241 and a release rod 242 that are fixedly connected. The hole 2525 of the tension rod 252 and the hole 2425 of the release rod 242 are both arranged on the axis of the fixed shaft 151 and can only rotate. The axial direction is restricted by the main substrate 111, the spacer washer 152, the nut lock washer 153, and the fixed shaft nut 154. The two ends of the tension release torsion spring 745 are respectively arranged on the tension rod 252 and the release rod 242 to provide a bias for the two. In the case of no external force, the rotational movement tendency of the tension module in the R direction causes the rotation to contact the surface 11151 of the main substrate 111 and be positioned in the initial static position, while the release module 240 has a rotational movement tendency in the opposite direction of R due to the bias of the tension release torsion spring 745, resulting in the rotation contacting the surface 11141 of the main substrate 111 and being positioned in the initial static position.

[0050] As Figure 7 , Figure 12 , Figure 20 , Figure 22, the tensioning claw 253 is pivotally connected to the tensioning rod 252 and there is a tensioning claw torsion spring 255 providing a bias. The two ends of the tensioning claw torsion spring 255 are respectively arranged on the tensioning claw 253 and the tensioning rod 252. The tensioning claw 253 has a tendency to move in the reverse R direction. The tensioning claw retaining ring 254 is snapped into a corresponding groove provided on the tensioning claw 253 to restrict the tensioning claw 253 to only rotate about its axis. When the tensioning module is in the initial stationary position, the pushing tooth portion 2532 of the tensioning claw 253 is in contact with the surface 11121 of the main substrate 111 and is disengaged from the meshing diameter range of the plurality of tensioning teeth on the ratchet wheel 231 and is in the initial stationary position.

[0051] As Figure 7 , Figure 9 , Figure 12 , Figure 20 , Figure 22 shown, when the tensioning rod sleeve 251 is pushed to rotate in the reverse R direction from the initial stationary position, as Figure 12 shown, the pushing tooth portion 2532 of the tensioning claw 253 moves away from the surface 11121 of the main substrate 111 as Figure 22 and is biased by the tensioning claw torsion spring 255 to mesh with the tensioning teeth 23111 or 23112 etc. on the ratchet wheel 231 as Figure 20 shown. The winding module is driven to rotate in the reverse R direction. At the same time, the ratchet wheel 231 pushes the positioning claw 232 to rotate against the bias of the positioning claw torsion spring 713 and disengage from the characteristic surface 11123 of the main substrate 111 as Figure 20 shown. When the ratchet wheel 231 rotates across the angle between two tensioning teeth, the positioning claw 232 returns to its initial stationary position under the biasing action of the positioning claw torsion spring 713. When the ratchet wheel 231 continues to rotate in the reverse R direction, the positioning claw 232 continuously repeats the above actions. When the force pushing the tensioning module is withdrawn, the tensioning module returns to the initial stationary position under the biasing force of the tensioning release torsion spring 745. At the same time, the pushing tooth portion 2532 of the tensioning claw 253 contacts the surface 11121 of the main substrate 111 and returns to the initial stationary position. At this time, the characteristic surface 2321 of the positioning claw 232 contacts a certain limiting tooth surface of the ratchet wheel 231 to overcome the bias of the winding wheel torsion spring 712 and limit the winding module in a new gear state.

[0052] As Figure 8 , Figure 9 , Figure 12 , Figure 17 , Figure 20, when the winding module is in a non-initial limit position, that is, when the feature 2115 on the winding wheel 211 is not in contact with the feature 1125 of the secondary substrate 112 but at some other gear position, the push release rod sleeve 241 is pushed to rotate in the R direction. The feature surface 2422 of the release rod 242 will stick to the feature surface 2325 of the positioning claw 232, driving the positioning claw 232 to rotate in the R direction against the bias of the positioning claw torsion spring 713. When the positioning claw 232 rotates a certain angle in the R direction, a certain limiting tooth surface of the ratchet wheel 231 will be disengaged from the limit of the feature surface 2321 of the positioning claw 232. Due to the bias of the winding wheel torsion spring 712, the ratchet wheel 231 and the winding module will rotate in the R direction, but the back of the limiting tooth surface of the ratchet wheel 231 will be blocked by the feature surface 2322 of the positioning claw 232. When the force pushing the release rod sleeve 241 is withdrawn, the release rod sleeve 241 rotates back to the initial static position under the bias of the tension release torsion spring 745. At the same time, the positioning claw 232 also rotates back to the initial static position under the action of the positioning claw torsion spring 713. At this time, the ratchet wheel 231 and the winding module continue to rotate under the bias of the winding wheel torsion spring 712 until the next limiting tooth surface of the ratchet wheel 231 is in contact with and limited by the feature surface 2321 of the positioning claw 232, thus completing the release of one gear position.

[0053] As Figure 15 —— Figure 19 and Figure 7 shown, the thread fixing member 212 included in the winding module is arranged on the winding wheel 211 and can slide on a frustum-like surface of the winding wheel 211. The guiding method is of the guide groove and guide rail type. The two components are respectively provided with guide grooves and guide rails, such as Figure 18 and Figure 19 shown rail 2129 and groove 2119. The sliding direction is the Figure 18 linear direction marked by 2110 in the middle. The thread fixing member 212 has a head pit 2121 for accommodating the head 911 of the variable speed wire 910 of the variable speed wire, a wire part hole 2122 for accommodating the wire part 912 of the variable speed wire, and a wire part groove 2123. The head pit 2121, the wire part hole 2122, and the wire part groove 2123 are configured to force the wire part 912 of the variable speed wire to fit on the winding outer surface of the winding wheel 211. The center of the head pit 2121, the wire part hole 2122, and the center of the wire part groove 2123 are coaxial or coplanar and perpendicular to the axis of the fixed shaft 151.

[0054] As Figure 4 —— Figure 7 and Figure 9As shown in the figure, in order to wind the wire part 912 of the speed change wire around any same cross-section of the axis of the winding wheel 211, a switching dock module 220 is provided. The switching dock module 220 includes a switching dock 221 and a switching dock nut 222 embedded in the switching dock 221. The switching dock 221 has a wire passing hole 2202 through which the wire part 912 of the speed change wire can pass. The center of the wire passing hole 2202 is coaxial or coplanar with the center of the wire part groove 2123 of the wire head fixing part 212, the center of the wire part hole 2122, and the center of the head pit 2121 in the working state. In the working state, the head 911 of the speed change wire is fixed in the head pit 2121 of the wire head fixing part 212, and the other end of the speed change wire passes through the wire part hole 2122, the wire part groove 2123 of the wire head fixing part 212, and the wire passing hole 2202 of the switching dock module 220 in sequence.

[0055] As Figure 4 —— Figure 9 and Figure 14 、 Figure 17 shown in the figure, two parallel cylindrical holes, namely hole 2203 and hole 2204, are provided on the switching dock 221. Correspondingly, parallel guide posts 113 and 114 are provided on the base forming the fixed module. The switching dock 221 can linearly slide relative to the base in the axial direction of the guide post 113. In addition, the switching dock 221 is also provided with a dock groove 2201 with two open sides. Correspondingly, the wire head fixing part 212 is also provided with a plate feature 21278 formed by surfaces 2127 and 2128. When the winding module rotates around the fixed axis to the initial limit position under the elastic force, the axial direction of the guide post 113 is the same as the sliding direction of the wire head fixing part 212 relative to the winding wheel 211. The sliding direction is Figure 18 the straight line direction marked by 2110 in the figure. At the same time, the dock groove 2201 of the switching dock 221 accommodates the plate feature 21278 of the wire head fixing part 212. The switching dock 221 linearly slides in the axial direction of the guide post 113, and can drive the wire head fixing part 212 to slide synchronously in the same direction relative to the winding wheel 211.

[0056] As Figure 3 —— Figure 6 and Figure 9 shown in the figure, in order to control the switching dock module 220 and the wire head fixing part 212 to move to the required positions relative to the winding wheel 211, a driving method of a bolt and nut is provided. The axial direction of the thread of the switching dock nut 222 is the same as the axial direction of the holes 2203 and 2204 of the switching dock 221. In addition, a speed type adjusting bolt 223 that is coaxial with the thread of the switching dock nut 222 and can only rotate around the axis is provided on the base module. The axial direction of the speed type adjusting bolt 223 is jointly restricted by the base module and the lower cover 311 that are fixedly connected.

[0057] As Figure 3 —— Figure 7, when it is necessary to set the displacement stroke of pulling or releasing the shift cable 910 to adapt to the chain wheel shifting mechanism of a variable-speed bicycle with different requirements, first ensure that the winding module of the bicycle shifter 010 rotates back to the initial limit position. The release lever sleeve 241 can be pushed to continuously release the gear along the R direction to reach this state. In this state, the switching dock 221 and the wire head fixing member 212 slide in the same direction, and the dock groove 2201 partially accommodates the plate feature 21278 of the fixing member 212, enabling synchronous sliding; removing the tension lever cover 256 reveals the hexagonal socket hole of the speed type adjusting bolt 223. Using tools such as a hexagonal wrench to rotate the speed type adjusting bolt 223, its rotational motion will be converted into a linear motion of the switching dock 221 and the wire head fixing member 212 along the axes of the holes 2203 and 2204 of the switching dock 221. Thus, the position of the wire head fixing member 212 relative to the winding wheel 211 is changed, and the winding radius of the shift cable part 912 on the winding wheel 211 is also changed. Subsequently, the stroke displacement of the shift cable 910 between the new gears of the bicycle shifter 010 is set.

[0058] Such as Figure 3 , Figure 6 , Figure 7 , when the rotation of the speed type adjusting bolt 223 stops, due to the self-locking characteristic of the thread, the switching dock module 220 will be fixed and no longer move. At the same time, the wire head fixing member 212 is fixed at the position of the required winding radius of the shift cable part 912. Even when the winding module is driven by the tensioning module in the opposite direction of R and limited to other gears, although the shift cable part 912 is partially wound and bent, due to the certain rigidity of the shift cable part 912, the center of the wire passing hole 2202 is always coaxial or coplanar with the center of the wire part groove 2123, the center of the wire part hole 2122, and the center of the head pit 2121 during the working state. Therefore, the position of the wire head fixing member 212 relative to the winding wheel 211 will not change, and the shift cable part 912 can always be wound on a certain cross-section of the axis of the winding wheel 211.

[0059] Such as Figure 1 , Figure 5 and Figure 16 , in order to facilitate observing the position of the wire head fixing member 212 relative to the winding wheel 211, the material of the speed type window 162 of the bicycle shifter 010 is set as a transparent material and is convenient for disassembly. Such as Figure 16 , at the same time, color marks are set on each speed type winding cross-section of the winding wheel 211, such as color mark 21151, color mark 21152, etc.; when disassembling and assembling the shift cable 910, the speed type window 162 needs to be disassembled and assembled.

[0060] Such as Figure 2 , Figure 7 , Figure 10 , Figure 12As shown, regarding the upper cover module 320 of the bicycle shifter 010, it can be just a separate upper cover or a module with a pointer. When it is a module with a pointer, the track disk 214 of the bicycle shifter 010 is fixedly connected to the reel 211 to transmit the movement of the winding module to the pointer. However, this part is not the focus of the present utility model and will not be described in detail. Additionally, the structures and operating principles of the relevant parts of the more specific tensioning module and release module are already well-known information, and the known information such as the gear shift cable sleeve 129 and the gear shift cable fine-tuning module 120 playing a supporting and fine-tuning role for the gear shift cable 910 on the bicycle will not be described in detail.

[0061] Finally, it must be stated again that the constituent elements disclosed in the foregoing embodiments of the present utility model are only for illustrative purposes and are not used to limit the patent protection scope of this case. The substitution or variation of other equivalent elements should also be covered by the patent protection scope of this case. In particular, it is pointed out that the shifter of the rear wheel of the bicycle is exemplified in this embodiment, and when the corresponding components and features are mirrored, they are equally applicable to the shifter of the front wheel of the bicycle.

Claims

1. A bicycle shifter for pulling and releasing a speed change cable connected to a derailleur connected to a bicycle chain ring or flywheel, comprising: A fixing module, in which a fixing shaft is provided around a central axis, a winding module which can rotate around the fixing shaft and is biased by a torsion spring, a gear limit module, a tensioning module for pulling the speed cable, and a releasing module for releasing the speed cable, characterized in that: the winding module includes a reel and a wire end fixing part which rotates around the fixing shaft, the reel has a winding outer surface for winding the speed cable, a busbar of the winding outer surface is not parallel to the axis of the winding outer surface, and the cross-sections of the winding outer surface at different positions corresponding to the axis have different diameters, the head and the wire part of the speed cable are partially fixedly arranged on the wire end fixing part, the reel and the wire end fixing part are provided with corresponding guiding features which can slide linearly relative to each other on a plane including the busbar and the axis, and the sliding direction is not parallel to the axis.

2. The bicycle shifter according to claim 1, characterized in that: The wire end fixing part has a head recess for accommodating the head of the shifting wire, and a wire hole and a wire groove for accommodating the wire portion of the shifting wire. The head recess, the wire hole and the wire groove are configured to force the wire portion of the shifting wire to fit against the winding outer surface. The center of the head recess and the center of the wire hole are coaxial or coplanar with the center of the wire groove and are perpendicular to the axis of the winding outer surface.

3. The bicycle shifter according to claim 2, characterized in that: The bicycle shifter further includes a switching dock module, which is arranged on the fixing module. The switching dock module has a wire passing hole through which the wire portion can pass. The center of the wire passing hole is coaxial or coplanar with the center of the wire portion groove, the center of the wire portion hole and the center of the head pit, and the wire passing hole is located on a side close to the wire portion groove.

4. The bicycle shifter according to claim 3, characterized in that: A linear guide feature is provided between the switching dock module and the fixed module so that they can slide linearly relative to each other. When the winding module is rotated to the initial limit position around the fixed axis under the elastic force of the torsion spring and the actions of the gear limit module and the release module, the linear sliding direction of the switching dock module relative to the fixed module is in the same direction as the linear sliding direction of the wire end fixing part relative to the reel.

5. The bicycle shifter according to claim 4, characterized in that: The wire end fixing piece and the switching dock module are provided with features that can cooperate with each other and are partially contained. When the winding module is in the initial limit position, the switching dock module and the wire end fixing piece are partially contained and can slide linearly synchronously along the linear sliding direction of the wire end fixing piece relative to the reel.

6. The bicycle shifter according to claim 5, characterized in that: The bicycle shifter further comprises a speed-type adjustment bolt pivotally connected to the fixing module and having an external thread feature.

7. The bicycle shifter according to claim 6, characterized in that: The switching dock module is provided with a threaded hole coaxially matched with the speed-type adjustment bolt. When the winding module is in the initial limit position, the rotational movement of the speed-type adjustment bolt can cause the switching dock module and the wire head fixing member to produce linear motion to change the position of the wire head fixing member relative to the reel.

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