Novel left-side speed regulation finger-shifting transmission
By designing a novel left-side adjustable shifter, which combines a set of levers, shift seats, and gear torque components, the structural and assembly complexity issues caused by the need for two sets of levers in existing technologies are solved, achieving the effect of simplifying the structure and reducing the number of parts.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 张杰锋
- Filing Date
- 2025-06-05
- Publication Date
- 2026-04-10
AI Technical Summary
Existing bicycle shifters require two sets of levers to shift up and down, which is complex and increases the number of parts and the complexity of the assembly process.
A novel left-side adjustable shifter gearbox was designed, which uses a set of levers to achieve upshift and downshift operations through a combination of shifter seats, gear torque components and self-resetting pawls, simplifying the structure and reducing the number of parts.
The gear shift can be completed by a set of levers, which simplifies the structure, reduces the number of parts, and simplifies the assembly process.
Smart Images
Figure CN224104246U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a bicycle speed change technical field especially a novel left side speed regulation finger dial speed changer. BACKGROUND
[0002] The finger dial speed changer is used for changing gears of the bicycle, when changing gears of the bicycle, the finger dial speed changer adjusts the tension of the speed change cable by dialing the gear-in lever or the gear-out lever, and then adjusts the positions of the front derailleur and the rear derailleur, so that the chain meshes with different gears on the front sprocket and the rear sprocket, and then the bicycle is speed-regulated.
[0003] Therefore, a novel left side speed regulation finger dial speed changer which can complete gear-in or gear-out by one group of handlebars, has simple structure and relatively reduces the number of parts is urgently needed. SUMMARY
[0004] The utility model discloses a novel left side speed regulation finger dial speed changer, which solves the technical problems of the prior art, such as the need for two groups of handlebars to realize gear-in and gear-out, complex structure and increased number of parts.
[0005] To achieve the above-mentioned purposes, the utility model provides the following technical schemes:
[0006] The utility model provides a novel left side speed regulation finger dial speed changer, which comprises a main seat installed on a handlebar, an upper cover installed on the main seat, a pointer rotatably connected in the upper cover, a handlebar dialing rod rotatably connected to the main seat through a main shaft, and further comprising:
[0007] The advancing and retreating seat is rotatably connected to the main shaft, the edge of the handlebar dialing rod is limited on the advancing and retreating seat, and the advancing and retreating seat torsional spring is installed between the advancing and retreating seat and the main seat.
[0008] The gear torsion assembly is installed on the main shaft and connected with the gear change cable, and the self-resetting stop component is installed on the main seat and connected with the gear torsion assembly in the counterclockwise direction of the main shaft.
[0009] Self-resetting pawl, which is installed on the edge of the advancing and retreating seat and is arranged in correspondence with the edge of the handle lever, pushes the self-resetting pawl and the gear torsion assembly through clockwise rotation of the handle lever, and pushes the self-resetting pawl and releases the gear torsion assembly in the counterclockwise direction through counterclockwise rotation of the handle lever.
[0010] Preferably, the gear torsion assembly comprises:
[0011] Gear teeth and wire wheel, which are coaxially fixedly connected and are sleeved on the main shaft, and the wire wheel is connected with the gear shifting wire;
[0012] Wire wheel torsion spring, which is installed between the wire wheel and the main shaft, and the teeth on the gear teeth and the self-resetting pawl are arranged in abutment in the counterclockwise direction of the main shaft.
[0013] Preferably, the self-resetting pawl comprises:
[0014] Retaining pawl, which is rotationally connected to the main seat;
[0015] Retaining pawl torsion spring, which is installed at the rotational connection between the retaining pawl and the main seat, and the retaining pawl and the gear teeth are arranged in abutment in the counterclockwise direction of the main shaft.
[0016] Preferably, the retaining pawl comprises:
[0017] First pawl, second pawl and third pawl, which are fixedly connected and are distributed in the circumferential direction, the first pawl is arranged near the clockwise direction of the main shaft, the second pawl is arranged near the counterclockwise direction of the main shaft, and the third pawl is pushed and the gear teeth are released in the counterclockwise direction through counterclockwise rotation of the handle lever.
[0018] Preferably, the gear torsion assembly further comprises:
[0019] Gear shifting protrusion, which is fixedly connected to the edge of the advancing and retreating seat and is arranged near the third pawl, and the gear shifting protrusion is arranged near the clockwise direction of the main shaft relative to the third pawl.
[0020] Preferably, it further comprises:
[0021] Advancing and retreating groove, which is arranged on the edge of the advancing and retreating seat and is arranged near the self-resetting pawl;
[0022] Dial block, which is fixedly connected to the edge of the handle lever and axially extends into the advancing and retreating groove and is arranged in abutment with the side of the self-resetting pawl away from the gear teeth.
[0023] Preferably, the self-resetting claw comprises:
[0024] The advancing pawl is rotationally connected to the side of the advancing and retreating seat and is arranged in the clockwise direction relative to the advancing protrusion of the main shaft;
[0025] The advancing pawl torsion spring is installed at the rotational connection between the advancing pawl and the advancing and retreating seat.
[0026] Preferably, the self-resetting claw further comprises:
[0027] The pull plate has a first end fixedly sleeved on the main shaft and a second end sleeved at the rotation center of the retreating claw and the main seat.
[0028] In the technical scheme of the utility model, the main function of the retreating self-resetting assembly is to prevent the gear torsion assembly from rotating counterclockwise, i.e., to prevent the gear torsion assembly from retreating; after the self-resetting claw, the gear torsion assembly and the retreating self-resetting assembly are pushed by external force, they rotate, and when the external force disappears, the self-resetting claw, the gear torsion assembly and the retreating self-resetting assembly can automatically reset; the main function of the advancing and retreating seat is: first, when advancing, manually rotate the handle lever in the clockwise direction, push the advancing and retreating seat to rotate in the clockwise direction, and at the same time, push the self-resetting claw and the gear torsion assembly to be connected, so as to push the gear torsion assembly to rotate one gear in the clockwise direction, and after the handle lever is released, the handle lever is reset by the advancing and retreating seat under the action of the advancing and retreating seat torsion spring, and the advancing is completed; second, when retreating, manually rotate the handle lever in the counterclockwise direction, push the advancing and retreating seat to rotate in the counterclockwise direction, and at the same time, push the retreating self-resetting assembly to rotate by a certain angle, then release the gear torsion assembly, i.e., the gear torsion assembly rotates in the counterclockwise direction by a certain angle and is blocked by the retreating self-resetting assembly, after the handle lever is released, the handle lever is reset by the advancing and retreating seat under the action of the advancing and retreating seat torsion spring, then the gear torsion assembly is reset under the action of torsion, the gear torsion assembly is continuously blocked, and the retreating is completed. Overall, the application can complete one advancing or retreating by rotating the handle lever in the clockwise or counterclockwise direction and releasing the handle lever, the structure is simple, the number of accessories is relatively reduced, and the assembly process is simplified. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creating labor.
[0030] Figure 1 It is the overall structure of the utility model;
[0031] Figure 2 It is the appearance structure schematic diagram of the utility model;
[0032] Figure 3 It is the handle lever, pointer schematic diagram of the utility model;
[0033] Figure 4 It is the advance pawl, gear tooth piece, stop pawl schematic diagram of the utility model;
[0034] Figure 5 It is the low gear state schematic diagram of the utility model;
[0035] Figure 6 It is the gear back schematic diagram of the utility model.
[0036] In the drawing, 1, main seat;2, main shaft;3, advance and retreat seat;301, gear back protrusion;302, advance and retreat groove;4, advance pawl;5, gear tooth piece;6, stop pawl;601, first claw;602, second claw;603, third claw;7, line wheel;701, spiral groove;8, handle lever;801, lever block;9, pull plate;10, pointer;1001, slide column;11, transparent plate;12, upper cover;13, stop pawl torsion spring;14, bush;15, advance pawl torsion spring;16, advance and retreat seat torsion spring;17, line wheel torsion spring. DETAILED DESCRIPTION
[0037] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other implementation manners obtained by the ordinary skill in the art without making the creative labor belong to the range of the utility model.
[0038] Reference Figures 1-6 The embodiment of the utility model provides a novel left side speed regulation finger dial gear, including main seat 1 installed on handlebar, upper cover 12 installed on main seat 1, pointer 10 rotationally connected in upper cover 12, handle lever 8 rotationally connected on main seat 1 through main shaft 2, further comprising:
[0039] Advance and retreat seat 3 and advance and retreat seat torsion spring 16, advance and retreat seat 3 rotationally connected on main shaft 2, the edge of handle lever 8 is limited on advance and retreat seat 3, advance and retreat seat torsion spring 16 is installed between advance and retreat seat 3 and main seat 1, and main shaft 2 passes through the center of advance and retreat seat torsion spring 16;
[0040] Gear torsion assembly and stop self-resetting assembly, gear torsion assembly is installed on main shaft 2, and is connected with gear change pull line, and stop self-resetting assembly is installed on main seat 1, and is connected with gear torsion assembly along the counterclockwise direction of main shaft 2.
[0041] The self-resetting claw is installed on the edge of the advancing and retreating seat 3 and is arranged in correspondence with the edge of the handle lever 8. The self-resetting claw is pushed to be engaged with the gear torsion assembly by rotating the handle lever 8 in the clockwise direction. The self-resetting claw is pushed to reset the gear torsion assembly and release the gear torsion assembly in the counterclockwise direction by rotating the handle lever 8 in the counterclockwise direction.
[0042] The conventional bicycle finger lever gear has an advancing handle and a retreating handle. The advancing and retreating are realized by two groups of handles. The structure is complex, the spare parts are increased, and the assembly process is more complex. In the present application, the main function of the self-resetting and retreating assembly is to prevent the gear torsion assembly from rotating in the counterclockwise direction, i.e., to prevent the gear torsion assembly from retreating. The self-resetting claw, the gear torsion assembly and the self-resetting and retreating assembly are rotated after being pushed by external force. When the external force disappears, the self-resetting claw, the gear torsion assembly and the self-resetting and retreating assembly can automatically reset. The main function of the advancing and retreating seat 3 is: first, when advancing, the handle lever 8 is manually rotated in the clockwise direction. The advancing and retreating seat 3 is rotated in the clockwise direction at the same time. The self-resetting claw is engaged with the gear torsion assembly. Then the gear torsion assembly can be pushed to rotate one gear in the clockwise direction. After the handle lever 8 is released, the handle lever 8 is reset by the advancing and retreating seat 3 under the action of the advancing and retreating seat torsion spring 16, and the advancing is completed. Second, when retreating, the handle lever 8 is manually rotated in the counterclockwise direction. The advancing and retreating seat 3 is rotated in the counterclockwise direction at the same time. After the self-resetting and retreating assembly is rotated by a certain angle, the gear torsion assembly is released. That is, the gear torsion assembly is rotated in the counterclockwise direction by a certain angle and is blocked by the self-resetting and retreating assembly. After the handle lever 8 is released, the handle lever 8 is reset by the advancing and retreating seat 3 under the action of the advancing and retreating seat torsion spring 16. Then the gear torsion assembly is reset under the action of the torsion force. The gear torsion assembly is blocked, and the retreating is completed. Overall, the present application can complete one advancing or retreating by rotating the handle lever 8 in the clockwise or counterclockwise direction and releasing it. The structure is simple, the spare parts are relatively reduced, and the assembly process is simplified.
[0043] The initial state, i.e. the lowest gear, the advance and retreat seat torsion spring 16 is in a free state, and the handle lever 8 is manually pushed once in the clockwise direction along the main shaft 2 for the forward gear operation. In this process, the handle lever 8 pushes the advance and retreat seat 3 to rotate clockwise, and the advance and retreat seat torsion spring 16 generates a restoring force. The handle lever 8 is manually pushed counterclockwise for the reverse gear operation. At this time, the handle lever 8 pushes the advance and retreat seat 3 to rotate counterclockwise, and the advance and retreat seat torsion spring 16 generates a restoring force. In the forward gear operation, the edge of the handle lever 8 pushes the self-resetting claw and the advance and retreat seat 3, so that the self-resetting claw is clamped with the gear torsion assembly, and the gear torsion assembly is pushed clockwise. Since the stop self-resetting assembly and the gear torsion assembly are clamped in the counterclockwise direction along the main shaft 2, the gear torsion assembly is blocked by the stop self-resetting assembly whenever it rotates one gear in the clockwise direction, thereby avoiding reverse gear. In the high gear reverse gear operation, the edge of the handle lever 8 pushes the advance and retreat seat 3, and then pushes the stop self-resetting assembly through the advance and retreat seat 3 and rotates counterclockwise, thereby releasing one gear of the gear torsion assembly. At the same time, the gear torsion assembly is blocked by the stop self-resetting assembly to avoid continuous reverse gear. After the handle lever 8 is released, the gear torsion assembly is continuously blocked by the stop self-resetting assembly. After the forward gear or reverse gear is completed, the handle lever 8 is released, and the handle lever 8 returns to the initial state through the advance and retreat seat 3 under the action of the restoring force of the advance and retreat seat torsion spring 16. The self-resetting claw returns to the initial state, i.e. does not contact the gear torsion assembly.
[0044] Further optimization scheme, the gear torsion assembly comprises:
[0045] The gear tooth piece 5 and the wire wheel 7 are coaxially fixedly connected and are sleeved on the main shaft 2. The wire wheel 7 is connected with the gear shifting pull wire.
[0046] The wire wheel torsion spring 17 is installed between the wire wheel 7 and the main shaft 2. The teeth on the gear tooth piece 5 and the stop self-resetting assembly are arranged in abutment in the counterclockwise direction along the main shaft 2.
[0047] The gear tooth piece 5 and the wire wheel 7 rotate synchronously. Whether it is forward gear or reverse gear, it is realized by the synchronous rotation of the gear tooth piece 5 and the wire wheel 7, thereby pulling the gear shifting pull wire to realize the meshing of the chain with different gears on the front tooth disc and the rear tooth disc. In the initial state, i.e. the lowest gear, the wire wheel torsion spring 17 is in a free state. Even if the reverse gear is mistakenly operated, the gear tooth piece 5 will not rotate due to the wire wheel torsion spring 17. In the high gear reverse gear, the gear tooth piece 5 rotates counterclockwise by the torsion of the wire wheel torsion spring 17, thereby performing reverse gear. When the forward gear is needed, the self-resetting claw needs to contact and clamp the gear tooth piece 5 to rotate the gear tooth piece 5 clockwise, and the stop self-resetting assembly prevents reverse gear, thereby realizing the forward gear operation.
[0048] Further optimization scheme, the stop self-resetting assembly comprises:
[0049] The retreat claw 6 is rotationally connected to the main seat 1.
[0050] The retreat claw torsion spring 13 is installed at the rotationally connected position of the retreat claw 6 and the main seat 1, and the retreat claw 6 is clamped and arranged in the counterclockwise direction of the main shaft 2.
[0051] In the initial state, i.e. the lowest gear, the retreat claw 6 is clamped with the gear tooth piece 5 under the action of the retreat claw torsion spring 13.
[0052] Further optimization scheme, the retreat claw 6 includes:
[0053] The first claw 601, the second claw 602 and the third claw 603 are fixedly connected and distributed in the circumferential direction, the first claw 601 is arranged near the clockwise direction of the main shaft 2, the second claw 602 is arranged near the counterclockwise direction of the main shaft 2, and the handle lever 8 is rotated counterclockwise to push the third claw 603 and release the gear tooth piece 5 counterclockwise.
[0054] Further optimization scheme, the gear torsion assembly further includes:
[0055] The retreat protrusion 301 is fixedly connected to the edge of the advancing and retreating seat 3 and arranged near the third claw 603, and the retreat protrusion 301 is arranged near the clockwise direction of the main shaft 2 relative to the third claw 603.
[0056] Further optimization scheme, further includes:
[0057] The advancing and retreating groove 302 is arranged on the edge of the advancing and retreating seat 3 and arranged near the self-resetting claw;
[0058] The block 801 is fixedly connected to the edge of the handle lever 8 and axially extends into the advancing and retreating groove 302 and is arranged in abutment with the side of the self-resetting claw away from the gear tooth piece 5.
[0059] Further optimization scheme, the self-resetting claw includes:
[0060] The advancing ratchet claw 4 is rotationally connected to the edge of the advancing and retreating seat 3 and arranged near the clockwise direction of the main shaft 2 relative to the retreat protrusion 301;
[0061] The advancing ratchet claw torsion spring 15 is installed at the rotationally connected position of the advancing ratchet claw 4 and the advancing and retreating seat 3.
[0062] The teeth near the clockwise direction on the gear tooth piece 5 are low gear teeth, and the teeth near the counterclockwise direction are high gear teeth; for example Figure 5, the low gear state, at this time, the dial block 801 is located in the reverse side of the advance and retreat groove 302 (i.e. close to the side wall of the anticlockwise direction), the advance pawl torsional spring 15 is in a free state; when the gear is advanced, the clockwise dial handle dial rod 8, the dial block 801 is synchronized with the advance, first push the advance pawl 4, overcome the resilience of the advance pawl torsional spring 15, make the advance pawl 4 and the low gear teeth on the gear teeth piece 5 fit, at the same time, the dial block 801 contact the clockwise side of the advance and retreat groove 302 (i.e. close to the side wall of the clockwise direction) and push the advance and retreat seat 3 clockwise rotation, when the handle dial rod 8 clockwise rotation to the specified position can't continue to rotate, at this time, the gear teeth piece 5 rotates an angle corresponding to a gear; Figure 4 for high gear teeth, that is, the state of the second claw 602 is about to be crossed, under the action of the resilience of the stop claw torsional spring 13, the stop claw 6 resets (such as Figure 5 ), when the handle dial rod 8 is released, under the action of the resilience of the advance pawl torsional spring 15, the advance pawl 4 resets (such as Figure 5 ), the advance pawl 4 pushes the dial block 801 to the reverse side of the advance and retreat groove 302, under the action of the advance and retreat seat torsional spring 16 through the advance and retreat seat 3, the handle dial rod 8 resets, under the action of the resilience of the wire wheel torsional spring 17, the gear teeth piece 5 together with the advance pawl 4, the dial block 801 rotates in the anticlockwise direction, the high gear teeth just crossed the second claw 602 is blocked by the second claw 602, the gear teeth piece 5 can't continue to rotate in the anticlockwise direction, at this time, a gear is completed.
[0063] the gear teeth piece 5 close to the clockwise direction is the low gear tooth, close to the anticlockwise direction is the high gear tooth; such as Figure 6 , the advance pawl 4 resets, the dial block 801 is located in the reverse side of the advance and retreat groove 302 (i.e. close to the side wall of the anticlockwise direction); when the high gear is reversed, the handle dial rod 8 is dialled in the anticlockwise direction, the dial block 801 is synchronized with the reverse movement, the dial block 801 pushes the advance and retreat seat 3 anticlockwise rotation, the retreat protrusion 301 pushes the third claw 603, makes the gear teeth piece 5 on the next gear tooth disengages the second claw 602, makes the gear teeth piece 5 close to the next gear high gear tooth is blocked by the first claw 601, the gear teeth piece 5 can't continue to rotate in the anticlockwise direction; when the handle dial rod 8 is released, under the action of the advance and retreat seat torsional spring 16 through the advance and retreat seat 3, the handle dial rod 8 resets, the retreat protrusion 301 resets with the advance and retreat seat 3 and disengages the third claw 603, under the action of the resilience of the stop claw torsional spring 13, the stop claw 6 resets, the gear teeth piece 5 close to the next gear low gear tooth is blocked by the second claw 602, at this time, a gear is completed.
[0064] Further optimization scheme, also includes:
[0065] The first end of the pull plate 9 is fixedly sleeved on the main shaft 2, and the second end of the pull plate 9 is sleeved at the rotation center of the retreat-stop claw 6 and the main seat 1.
[0066] The main function of the pull plate 9 is to prevent the handle lever 8 from sliding out of the top of the main shaft 2, and it can also be used to fix the retreat-stop claw torsional spring 13.
[0067] Further optimization schemes also include:
[0068] The helical groove 701 is arranged on the wire wheel 7.
[0069] The sliding column 1001 is axially fixedly connected to the end of the pointer 10 and axially extends into the helical groove 701.
[0070] The centripetal end of the helical groove 701 is close to the center of the wire wheel 7 in the helical direction; when the wire wheel 7 and the gear tooth piece 5 rotate synchronously, the sliding column 1001 is pushed through the helical groove 701, so as to push the pointer 10 to rotate by a certain angle, and the gear shifting or gear retreating situation can be observed through the pointer 10.
[0071] Further optimization schemes also include:
[0072] The transparent plate 11 is installed on the upper cover 12 and is correspondingly arranged with the pointer 10.
[0073] The situation of the pointer 10 can be observed through the transparent plate 11.
[0074] Further optimization schemes also include:
[0075] The bushing 14 is sleeved on the main shaft 2, and the wire wheel 7, the gear tooth piece 5 and the advancing and retreating seat 3 are sequentially sleeved on the bushing 14 from top to bottom.
[0076] The counterclockwise rotation in the application refers to the rotation in the counterclockwise direction, and the clockwise rotation refers to the rotation in the clockwise direction.
[0077] It should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like in the present text indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for description purposes and cannot be understood as indicating or implying relative importance.
[0078] In the description herein, it also needs to be explained that, unless explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0079] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A new left side speed regulating finger dial transmission, comprising a main seat (1) mounted on a handlebar, an upper cover (12) mounted on the main seat (1), a pointer (10) rotatably connected in the upper cover (12), a handle dial rod (8) rotatably connected on the main seat (1) through a main shaft (2), characterized in that, Also include: The advance and retreat seat (3) is rotatably connected to the main shaft (2), the edge of the handle lever (8) is limited on the advance and retreat seat (3), and the advance and retreat seat torsion spring (16) is installed between the advance and retreat seat (3) and the main seat (1); The gear torsion assembly is installed on the main shaft (2) and connected with the gear shifting pull wire, and the self-resetting stop component is installed on the main seat (1) and connected with the gear torsion assembly in the counterclockwise direction of the main shaft (2); The self-resetting claw is installed on the edge of the advance and retreat seat (3) and corresponds to the edge of the handle lever (8), the handle lever (8) is rotated in the clockwise direction to push the self-resetting claw and the gear torsion assembly, and the handle lever (8) is reset by rotating in the counterclockwise direction to push the self-resetting stop component and release the gear torsion assembly in the counterclockwise direction.
2. The novel left-hand variable speed thumb-shift transmission of claim 1, wherein, The gear torsion assembly includes: The gear tooth piece (5) is coaxially fixedly connected with the wire wheel (7) and is sleeved on the main shaft (2), the wire wheel (7) is connected with the gear shifting pull wire, and the teeth on the gear tooth piece (5) are abutted with the self-resetting stop component in the counterclockwise direction of the main shaft (2). The self-resetting stop component includes:
3. The new left-hand variable speed index transmission of claim 2, wherein, The stop claw (6) is rotatably connected to the main seat (1); The stop claw torsion spring (13) is installed at the rotatable connection between the stop claw (6) and the main seat (1), and the stop claw (6) is abutted with the gear tooth piece (5) in the counterclockwise direction of the main shaft (2). The stop claw (6) includes:
4. The novel left-hand variable speed thumb-shift transmission of claim 3, wherein, The first claw (601), the second claw (602) and the third claw (603) are fixedly connected and distributed in the circumferential direction, the first claw (601) is arranged near the clockwise direction of the main shaft (2), the second claw (602) is arranged near the counterclockwise direction of the main shaft (2), and the third claw (603) is pushed and the gear tooth piece (5) is released in the counterclockwise direction by rotating the handle lever (8) in the counterclockwise direction. The gear torsion assembly further includes:
5. The novel left-hand variable speed thumb-shift transmission of claim 4 wherein, The gear shifting protrusion (301) is fixedly connected to the edge of the advance and retreat seat (3) and arranged near the third claw (603), and the gear shifting protrusion (301) is arranged near the clockwise direction of the main shaft (2) relative to the third claw (603). Further include:
6. The novel left-hand variable speed thumb-shift transmission of claim 5 wherein, The advance and retreat groove (302) is arranged near the self-resetting claw. A dial block (801) is fixedly connected to the side of the handle dial rod (8) and axially extends into the in-out groove (302) and abuts against the side of the self-resetting claw away from the gear tooth piece (5).
7. The new left-hand variable speed index transmission of claim 6, wherein, The self-resetting claw comprises: An in-notch claw (4) is rotationally connected to the side of the in-out seat (3) and is arranged in the clockwise direction of the main shaft (2) relative to the reverse gear protrusion (301); An in-notch claw torsion spring (15) is installed at the rotational connection between the in-notch claw (4) and the in-out seat (3).
8. The new left side speed-adjusting finger-shift transmission according to claim 4, characterized in that, Further comprising: A pull plate (9) has a first end fixedly sleeved on the main shaft (2) and a second end sleeved at the rotational center of the stop claw (6) and the main seat (1).