CN113978602B - Bicycle, bicycle control device and bicycle gear shifting mechanism thereof - Google Patents
Bicycle, bicycle control device and bicycle gear shifting mechanism thereof Download PDFInfo
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- CN113978602B CN113978602B CN202011503459.5A CN202011503459A CN113978602B CN 113978602 B CN113978602 B CN 113978602B CN 202011503459 A CN202011503459 A CN 202011503459A CN 113978602 B CN113978602 B CN 113978602B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 41
- 238000004804 winding Methods 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 12
- 230000009471 action Effects 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005381 potential energy Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
- B62M25/02—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers
- B62M25/04—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers hand actuated
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering Devices For Bicycles And Motorcycles (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a bicycle gear shifting mechanism, and discloses a bicycle with the bicycle gear shifting mechanism and a bicycle control device, wherein the bicycle gear shifting mechanism comprises: a base; the winding assembly comprises a rotating shaft and a winding disc fixedly arranged on the rotating shaft, the rotating shaft is rotationally connected to the base, and an elastic reset mechanism is arranged at the rotational connection part of the rotating shaft and the base; the stirring assembly is rotationally connected to the rotating shaft; the gear feeding unit is arranged on the rotating shaft; the gear reversing assembly comprises a gear reversing ratchet wheel, a release pawl and a positioning pawl, wherein a first elastic reset piece is arranged at the hinge joint of the release pawl and the base, and a second elastic reset piece is arranged at the hinge joint of the positioning pawl and the base. The gear shifting mechanism designed by the invention has smooth and natural gear withdrawal, so that the internal structure of the gear shifting mechanism has better coordination, the internal structure is compact, the stability is strong, the problem that the old structure cannot adapt to more gears is solved, and the gear shifting process is more reliable.
Description
Technical Field
The invention relates to the technical field of bicycles, in particular to a bicycle, a bicycle control device and a bicycle gear shifting mechanism thereof.
Background
Bicycles on the market are generally equipped with shifters. In order to adapt to different road conditions, such as uphill, downhill, flat road, mountain road or uneven road surface, the gear shifter changes the engagement process of the chain and different chain wheels, and the speed of the vehicle is changed. In the gear shifting process, the gear shifter shifts the gear shifting rod or the gear reversing rod, and the chain is meshed with the upper-stage high-gear chain wheel or the lower-stage low-gear chain wheel, so that the transmission ratio between wheels is changed, and the driving environment is adapted.
In the existing bicycle, the gear shifter is generally composed of a ratchet wheel and three pawls, wherein the three pawls comprise a release pawl, a positioning pawl and a gear-entering pawl. When the gear is retreated, the locking ratchet releases the locking of the ratchet, the ratchet retreats under the action of the reset spring, and when the ratchet retreats to the initial position, the positioning pawl clamps the ratchet, at the moment, the release pawl resets, the ratchet is locked again, and the gear is retreated. However, in the gear-reversing process, the locking ratchet wheel is directly reversed to an initial state, and needs to be shifted one by one again, which is very troublesome.
In other gear shifters in the prior art, the structure capable of realizing the advance and the retreat of gears one by one is complex, when the gears are retreated, the single pawl is adopted for clamping engagement, a gear shifting unsmooth state exists, the gear shifting phenomenon is easy to occur, the problem of gear jump of the rear derailleur is caused, and potential safety hazards exist.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a bicycle gear shifting mechanism, which improves the gear reversing smoothness of a bicycle and realizes orderly gear reversing.
The invention also provides a bicycle control device with the bicycle gear shifting mechanism.
The invention further provides a bicycle with the bicycle control device.
According to an embodiment of the first aspect of the present invention, a bicycle includes: a base; the winding assembly comprises a rotating shaft and a winding disc fixedly arranged on the rotating shaft, the rotating shaft is rotationally connected to the base, and an elastic reset mechanism is arranged at the rotational connection part of the rotating shaft and the base; the stirring assembly is rotationally connected to the rotating shaft; the gear feeding assembly is arranged on the rotating shaft; the gear reversing assembly comprises a gear reversing ratchet wheel, a release pawl and a positioning pawl, wherein the gear reversing ratchet wheel is fixedly arranged on the rotating shaft, and the release pawl and the positioning pawl are arranged on the base; the shifting assembly is connected with the release pawl/the positioning pawl, the release pawl is connected with the positioning pawl, and at the same time, one and only one of the release pawl and the positioning pawl is meshed with the gear reversing ratchet wheel.
The bicycle gear shifting mechanism provided by the embodiment of the invention has at least the following beneficial effects: when the gear shifting mechanism is in gear shifting, the shifting component pushes the release pawl to leave the gear shifting pawl, the rotating shaft drives the gear shifting ratchet wheel to rotate under the action of the elastic reset mechanism, the release pawl is rotationally meshed with the gear shifting ratchet wheel in the separation process, the positioning pawl locks the rotating shaft, the rotating angle of the gear shifting ratchet wheel is smaller than or equal to the angle of one gear shifting tooth, after the shifting component is loosened, the release pawl is meshed with the gear shifting ratchet wheel again, the release pawl is clamped on the next gear shifting ratchet wheel of the gear shifting ratchet wheel, the positioning pawl is separated from the gear shifting ratchet wheel, the single pawl is released and the gear shifting ratchet wheel is changed into double pawl release, one release pawl and the positioning pawl are matched with the gear shifting ratchet wheel in the same time, the gear shifting ratchet wheel is always kept in the meshed state, the gear shifting ratchet wheel is locked by the release pawl and the positioning pawl, the gear shifting ratchet wheel is smooth and natural, good coordination is achieved between internal structures of the gear shifting mechanism, the internal structure is compact, the stability is strong, the problem that an old structure cannot adapt to more gears is overcome, and the gear shifting process is more reliable.
According to some embodiments of the present invention, the release pawl and the positioning pawl are both hinged on the base, a first elastic reset member is disposed at a hinge position of the release pawl and the base, a second elastic reset member is disposed at a hinge position of the positioning pawl and the base, a contact portion abutting against the positioning pawl is disposed on the release pawl, the second elastic reset member can push the positioning pawl to be engaged on the gear-withdrawal ratchet, the first elastic reset member can overcome an elastic force of the second elastic reset member, so that the release pawl is engaged on the gear-withdrawal ratchet and the positioning pawl is disengaged from the gear-withdrawal ratchet, and the toggle assembly abuts against the release pawl and can push the release pawl to be engaged on the gear-withdrawal ratchet, at this time, the contact portion pushes the positioning pawl to be disengaged from the gear-withdrawal ratchet.
From the above, it is one of the preferred embodiments of the present invention that, after the toggle assembly is released, the release pawl is reengaged on the reverse ratchet under the action of the first elastic restoring member, and the first elastic restoring member overcomes the elastic force of the second elastic restoring member to disengage the positioning pawl from the reverse ratchet, and at this time, the release pawl is clamped on the next reverse ratchet of the reverse ratchet.
According to some embodiments of the present invention, the shift assembly is provided with a shift lever and a shift piece, the shift piece includes a first switching portion, a second switching portion and a connecting piece, the connecting piece is fixedly connected between the first switching portion and the second switching portion, the first switching portion and the second switching portion are disposed on the rotating shaft along an axis direction, the shift lever is disposed on the first switching portion, and the second switching portion includes a thrust portion abutted with the contact portion.
From the above, the shift assembly is one of the preferred structures, the shift reversing lever is shifted to rotate the shift plate, the contact part on the release pawl is pushed by the pushing part, and the release pawl is rotationally buckled on the shift reversing ratchet.
According to some embodiments of the invention, the first end of the release pawl is provided with a gear-withdrawal ratchet, the thrust portion is abutted on the second end of the release pawl, the contact portion is located on the first end of the release pawl, the first end of the positioning pawl is provided with a positioning ratchet, and the second end of the positioning pawl is abutted with the contact portion.
From the above, in order to be one of the preferred structures of the release pawl and the positioning pawl, the toggle assembly pushes the second end portion of the release pawl, the reverse ratchet approaches to the reverse ratchet around the hinge portion and is meshed with the reverse ratchet, the release pawl and the positioning pawl are mutually linked, and one pawl always leans against the reverse pawl in the reverse process.
According to some embodiments of the invention, the gear assembly comprises a gear ratchet wheel and a gear member, wherein the gear ratchet wheel is fixedly arranged on the rotating shaft, and the gear member is provided with a gear ratchet meshed with the gear ratchet wheel.
From the above, the gear feeding assembly utilizes a ratchet structure, and when the gear feeding ratchet advances by one gear, the release pawl locks the gear returning ratchet and fixes the position of the rotating shaft, so that the gear feeding ratchet is fixed, the two ratchets are mutually coordinated, the gear feeding reliability is high, and smooth gear shifting is realized.
According to some embodiments of the invention, the gear-entering component comprises a locking piece, a switching block and a gear-entering shifting lever, wherein the locking piece is arranged on the rotating shaft, the switching block is hinged on the inner side of the locking piece, the gear-entering shifting lever is rotationally connected to the switching block, the gear-entering ratchet is arranged on one side of the switching block, a third elastic reset piece is arranged in the switching block, the gear-entering ratchet is tightly propped against the gear-entering ratchet, and the rotation axis of the gear-entering shifting lever is intersected with the rotation axis of the switching block.
From the top, the switching piece is meshed with the gear-entering ratchet wheel on the inner side of the locking piece, the gear-entering shifting lever is shifted, the gear-entering shifting lever pushes the switching piece to drive the gear-entering ratchet wheel to enter a gear along the gear-entering direction, after the gear-entering is completed, the pawl is released to lock the gear-withdrawing ratchet wheel, the rotating shaft position is fixed, and the gear-entering shifting lever withdraws from the gear-entering ratchet wheel under the action of the reset piece and is meshed with the ratchet position of the next gear again.
According to some embodiments of the invention, the rotating shaft comprises a front half shaft and a rear half shaft, an adapter sleeve is sleeved on the front half shaft, the locking piece is rotatably connected to the adapter sleeve, the cross section of the rear half shaft is round-head rectangular, and mounting holes matched with the rear half shaft are formed in the gear-withdrawing ratchet wheel and the gear-advancing ratchet wheel.
From the above, as one of the preferred structures of the rotating shaft, a structural basis is provided for rotationally connecting the locking piece on the rotating shaft, and the gear-entering component can rotate relative to the rotating shaft so as to reset to the next gear after gear-entering is completed.
According to some embodiments of the invention, the gear-in shift lever is provided with a limit wedge, the lock catch piece is provided with a wedge-shaped convex surface, a fourth elastic reset piece is arranged at the rotation connection part of the gear-in shift lever and the adapter block, and the fourth elastic reset piece enables the gear-in shift lever to rotate and enables the limit wedge to be abutted against the wedge-shaped convex surface.
From the above, the limit wedge block and the wedge-shaped convex surface are matched to limit the maximum rotation angle of the gear-entering shifting lever so as to limit the gear-entering ratchet wheel to enter one gear each time, and avoid the phenomenon of gear jump.
According to some embodiments of the invention, a fifth elastic restoring element is arranged on the locking piece, and the fifth elastic restoring element is connected between the base and the locking piece.
From the above, the fifth elastic reset piece keeps the relative position of the locking piece and the base so as to cooperate with the gear-in operation of the switching block and the gear-in shifting lever.
A bicycle operating device in accordance with a second aspect of an embodiment of the present invention includes a handlebar and a bicycle shift mechanism as set forth in any one of the above, the bicycle shift mechanism being disposed on the handlebar.
The bicycle control device provided by the embodiment of the invention has at least the following beneficial effects: by adopting the bicycle gear shifting mechanism with strong reliability, the whole handlebar structure is more compact, the gear shifting is smooth, and the service life is long.
A bicycle in accordance with an embodiment of a third aspect of the present invention includes a bicycle operating device as described above.
The bicycle provided by the embodiment of the invention has at least the following beneficial effects: the handlebar with the gear shifting mechanism is matched with the rear derailleur on the vehicle body to jointly assist in completing a smooth gear shifting process, so that the gear shifting mechanism has good control coordination.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic overall structure of a bicycle shifting mechanism in accordance with a first aspect of the present invention;
FIG. 2 is an exploded schematic view of the bicycle shifting mechanism illustrated in FIG. 1;
FIG. 3 is an overall assembly view of the winding assembly, the toggle assembly, the entry and exit assembly shown in FIG. 1;
FIG. 4 is a full cross-sectional view of the overall structure shown in FIG. 3;
FIG. 5 is a schematic structural view of the reverse assembly shown in FIG. 3;
FIG. 6 is a schematic view of the tumbler shown in FIG. 5;
FIG. 7 is a schematic view of the positioning pawl shown in FIG. 5;
FIG. 8 is a schematic view of the release pawl shown in FIG. 5;
FIG. 9 is a top view of the unitary structure shown in FIG. 3;
FIG. 10 is a schematic view of the structure in the direction A-A in FIG. 9;
FIG. 11 is a schematic view of the structure of the feed gear assembly of FIG. 3 in an operative state;
FIG. 12 is a schematic view of the reverse assembly of FIG. 3 in a locked condition;
FIG. 13 is a schematic view of the reverse assembly of FIG. 3 in a released state;
FIG. 14 is a schematic overall structure of a bicycle operating device in accordance with a second aspect of the present invention.
The drawings are marked:
A base 100 and a brake lever 110;
the device comprises a rotating shaft 210, a front half shaft 211, a rear half shaft 212, a winding disc 220, an elastic reset mechanism 230 and an adapter sleeve 240;
A toggle piece 310, a first switching part 311, a second switching part 312, a connecting piece 313, a gear-reversing lever 320 and a thrust part 330;
the gear assembly 400, the gear ratchet 410, the locking piece 420, the adapter 430, the gear shift lever 440, the limit wedge 441, the third elastic reset piece 450, the fourth elastic reset piece 460 and the fifth elastic reset piece 470;
A reverse gear assembly 500, a reverse gear ratchet 510, a release pawl 520, a locking ratchet 521, a contact portion 522, a positioning pawl 530, a positioning ratchet 531, a first elastic restoring member 540, a second elastic restoring member 550;
Handle bar 600.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, a number means one or more, a plurality means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 11 together, a bicycle shifting mechanism according to a first embodiment of the present invention will be explained.
Referring to fig. 1 to 4, a bicycle shift mechanism includes a base 100, a winding assembly, a toggle assembly, a shift-in assembly 400 and a shift-out assembly 500, the winding assembly includes a rotation shaft 210 and a winding disc 220, and the shift-out assembly 500 includes a shift-out ratchet 510, a release pawl 520 and a positioning pawl 530.
The base 100 is internally provided with a containing cavity, the rotating shaft 210 is arranged in the containing cavity and is rotationally connected with the base 100, a first bearing is arranged at the rotating joint of the rotating shaft 210, the winding disc 220 is fixedly arranged on the rotating shaft 210, a connector lug is arranged on the winding disc 220, a through hole is arranged in the connector lug, a gear shifting line penetrates through the through hole and surrounds the winding disc 220, and meanwhile, the winding disc 220 is also provided with a positioning protrusion which can be abutted on the base 100 to limit the initial position of the winding disc 220 on the base 100. The rotating connection part of the rotating shaft 210 and the base 100 is provided with an elastic reset mechanism 230, one end of the elastic reset mechanism 230 is connected to the base 100, the other end is connected to the rotating shaft 210, when the rotating shaft 210 moves relative to the base 100, the elastic reset mechanism 230 stores deformation potential energy, and when the rotating shaft returns, the deformation potential energy is converted into kinetic energy, and the rotating shaft 210 has a turning capability. The elastic restoring mechanism 230 may be a restoring spring.
Example 1
Referring to fig. 5, a gear-withdrawal ratchet 510 is fixedly provided on a rotation shaft 210, rotates in the same direction and speed as the rotation shaft 210, a release pawl 520 and a positioning pawl 530 are both hinged on a base 100, a first hinge hole and a second hinge hole are provided on the base 100, a first pin and a second pin are respectively provided in the first hinge hole and the second hinge hole, and the first pin and the second pin respectively pass through the middle position of the release pawl 520 and the middle position of the positioning pawl 530. The release pawl 520 is provided with a locking ratchet 521, the positioning pawl 530 is provided with a positioning ratchet 531, the locking ratchet 521 and the positioning ratchet 531 can be meshed with the gear-withdrawal ratchet 510, the gear-withdrawal ratchet 510 is provided with a plurality of ratchets, gear tooth grooves are formed between adjacent ratchets, and each gear tooth groove corresponds to a driving gear. The hinge joint of the release pawl 520 and the base 100 is provided with a first elastic reset piece 540, the first elastic reset piece 540 is used for resetting and storing energy of the release pawl 520, the release pawl 520 is pushed to be meshed with the gear reversing ratchet 510, the hinge joint of the positioning pawl 530 and the base 100 is provided with a second elastic reset piece 550, and the second elastic reset piece 550 is used for resetting and storing energy of the positioning pawl 530 and pushing. Wherein, the release pawl 520 is provided with a locking ratchet 521, the positioning pawl 530 is provided with a positioning ratchet 531, and the locking ratchet 521 and the positioning ratchet 531 can be engaged on the gear tooth slot of the reverse ratchet 510. The locking ratchet 521 and the positioning ratchet 531 are provided on the circumferential outer side of the reverse ratchet 510, and in this embodiment, the locking ratchet 521 and the positioning ratchet 531 are located on both sides of the rotational axis of the positioning ratchet, respectively.
The first elastic reset piece 540 and the second elastic reset piece 550 have opposite force application directions, the release pawl 520 is provided with a contact part 522 which is in contact with the positioning pawl 530, so that the two pawls can swing in the same direction, and the poking assembly is in contact with the release pawl 520. In the non-gear-withdrawal state, the release pawl 520 is engaged on the gear-withdrawal ratchet 510, the first elastic restoring member 540 overcomes the elastic force of the second elastic restoring member 550, and the contact portion 522 pushes the positioning pawl 530 to disengage from the gear-withdrawal pawl; during the gear-reversing process, the shifting component pushes the release pawl 520 to rotate, so that the locking ratchet 521 is separated from the gear-reversing ratchet 510, the positioning pawl 530 rotates, and the positioning ratchet 531 is meshed with the gear-reversing ratchet 510.
Specifically, referring to fig. 6, the shift assembly is provided with a shift withdrawal lever 320 and a shift piece 310, the shift piece 310 includes a first adapting portion 311, a second adapting portion 312 and a connecting piece, the first adapting portion 311 and the second adapting portion 312 are arranged in parallel, and a circular hole is formed in the middle of the first adapting portion 311 and the second adapting portion 312 and is used for being rotationally connected to the rotating shaft 210. The connecting piece is fixedly connected with the first switching part 311 and the second switching part 312, the first switching part 311, the connecting piece and the second switching part 312 can be formed in a welding or integrated forming mode, the whole stirring piece 310 is in a bridge shape, the stirring piece 310 is provided with a thrust part 330, the thrust part is arranged on the second switching part 312 and is abutted with the contact part 522, and the contact part 522 of the release pawl 520 is a force application part of the stirring piece 310.
In a preferred embodiment, referring to fig. 7 and 8, the middle part of the release pawl 520 is hinged to the base 100, the first end thereof is provided with a withdrawal ratchet, the contact part 522 is provided on the second end of the release pawl 520, the withdrawal ratchet and the contact part 522 are oppositely provided at both ends of the hinge part of the release pawl 520, and the withdrawal ratchet 510 rotates in the same direction around the hinge part when the contact part 522 rotates, and is disengaged/engaged with the withdrawal ratchet 510. The middle part of the positioning ratchet 531 is hinged on the base 100, the whole positioning pawl 530 is arched, the middle part is hinged on the bottom side of the gear reversing pawl, the first end part of the positioning pawl 530 is provided with the positioning ratchet 531 which can be meshed on the gear reversing ratchet 510, the second end part of the positioning ratchet 531 is abutted with the contact part 522, and the contact part 522 pushes the second end part to drive the positioning ratchet 531 to be separated from/meshed on the gear reversing ratchet 510.
The first elastic restoring member 540 and the second elastic restoring member 550 are torsion springs, the first ends of the first elastic restoring member 540 and the second elastic restoring member 550 are fixed on the base 100, the release pawl 520 is provided with a locking and limiting part clamped with the second end of the first elastic restoring member 540, and the positioning pawl 530 is provided with a positioning and limiting part clamped with the second end of the second elastic restoring member 550.
Referring to fig. 9 and 10, the gear shift assembly 400 includes a gear shift ratchet 410 and a gear shift member, the gear shift ratchet 410 is fixedly disposed on the rotating shaft 210, the gear shift member is provided with a gear shift ratchet engaged with the gear shift ratchet 410, the gear shift ratchet 410 is fixedly disposed on the rotating shaft 210, and the gear shift member is provided with a gear shift ratchet engaged with the gear shift ratchet 410. The gear-in component pushes the gear-in ratchet 410 to rotate forward by utilizing the gear-in ratchet, after rotating a gear angle, because the ratchet structure is a working principle that the gear-in ratchet can rotate forward and lock reversely, the gear-out ratchet 510 rotates in the same direction by the same angle under the action of the same rotating shaft 210, the release pawl 520 clamps the rotated gear-out ratchet 510, and the winding disc 220 drives the rear derailleur to work, so that gear-in is completed.
The concrete structure of the gear-entering component comprises a locking piece 420, an adapter block 430 and a gear-entering shifting lever 440, wherein the locking piece 420 is arranged on a rotating shaft 210, the adapter block 430 is provided with oppositely arranged hinge parts, the adapter block 430 is hinged on the locking piece 420 through the hinge parts, the locking piece 420 is provided with a hinge hole, the hinge parts are in a round-head rectangular shape, and the arc ends of the hinge parts are matched with the hinge hole. The gear-in shifting lever 440 is rotationally connected to the adapter block 430, the rotational connection part of the gear-in shifting lever is connected through a pin, a third elastic reset piece 450 and a fourth elastic reset piece 460 are arranged in the adapter block 430, the third elastic reset piece 450 and the fourth elastic reset piece 460 can be torsion springs, the third elastic reset piece 450 is connected between the rotating block and the locking piece 420, the gear-in ratchet on the adapter block 430 is tightly propped against the gear-in ratchet 410, the fourth elastic reset piece 460 is sleeved on a pin and connected between the adapter block 430 and the gear-in shifting lever 440, the gear-in shifting lever 440 is pushed to reset, a limiting wedge 441 is arranged on the gear-in shifting lever 440, a wedge-shaped convex surface is arranged on the locking piece 420, and the fourth elastic reset piece 460 enables the gear-in shifting lever 440 to rotate and be propped against the wedge-shaped convex surface. The base 100 is provided with a brake lever 110, the brake lever 110 is arranged on the outer side of the gear-in shifting lever 440 and is positioned in the gear-in direction, the brake lever 110 is provided with a concave cavity matched with the outer contour of the auxiliary shifting lever, the gear-in shifting lever 440 is sleeved into the concave cavity when being shifted in gear-in, and the concave cavity plays a limiting role on the gear-in shifting lever 440.
The gear-in ratchet is disposed at one side of the adapter block 430, the rotation axis of the gear-in shift lever 440 is intersected with the rotation axis of the adapter block 430, the gear-in shift lever 440 realizes spherical rotation under the action of the adapter block 430, and the main function is the rotation process of the adapter block 430 around the latch plate 420, referring to fig. 1, the gear-in shift lever 440 applies force to rotate the adapter block 430, the adapter block 430 rotates along the gear-in direction of the X direction, the gear-in ratchet 410 just passes through a gear when reaching the cavity, at this time, the gear-out ratchet 510 fixes the rotating shaft 210 under the action of the release pawl 520, so that the gear-in ratchet 410 cannot be retracted, and the gear-in shift lever 440 and the adapter block 430 retract to the initial positions under the action of the third elastic reset element 450 and the fourth elastic reset element 460, so as to complete the gear-in operation.
The rotating shaft 210 comprises a front half shaft 211 and a rear half shaft 212, the front half shaft 211 is a round shaft, the cross section of the front half shaft 211 is round, an adapter sleeve 240 is sleeved on the front half shaft 211, a lock catch piece 420 is rotationally connected to the adapter sleeve 240, the adapter sleeve 240 is used for rotationally connecting the lock catch piece 420 and the rotating shaft 210, the cross section of the rear half shaft 212 is a round-head rectangle, namely a rectangle formed by two straight edges and two arc edges, the two right-angle edges are flat surfaces formed on the rotating shaft 210, mounting holes matched with the rear half shaft 212 are formed in the gear withdrawing ratchet 510 and the gear advancing ratchet 410, the cross section of each mounting hole is also a round-head rectangle, and synchronous rotation of the gear advancing ratchet 410 and the gear withdrawing ratchet 510 and the rotating shaft 210 is limited. The shift-in ratchet 410 and the shift-out ratchet 510 may be fixed to the rotation shaft 210 by axial assembly between shafts, or may be fixed to the rotation shaft 210 by other means.
In some embodiments of the present invention, a fifth elastic restoring member 470 is disposed on the locking piece 420, and a positioning elastic restoring member is connected between the base 100 and the locking piece 420, so that the rotating shaft 210 rotates while the fifth elastic restoring member 470 always maintains the relative positions of the locking piece 420 and the base 100, so as to cooperate with the gear-in operation of the switching block 430 and the gear-in shift lever 440. In addition, the locking piece 420 can be fixedly connected with the base 100, and the locking piece 420 does not rotate synchronously with the rotating shaft 210, so that the technical effect of gear shifting in the invention can be achieved.
Referring to fig. 10 and 11, in gear shift, the gear shift lever 440 pushes the gear shift ratchet 410 to rotate along the X-axis direction, and drives the gear shift rotating shaft 210 to rotate through the rotating shaft 210, after one gear shift is performed, the release pawl 520 clamps the gear shift rotating shaft 210 in the gear shift, the gear shift lever 440 resets and the rotating block 430 is retracted into the next gear shift, and gear shift is completed; referring to fig. 12 and 13, in the gear-withdrawal, the gear-withdrawal lever 320 is shifted to release the release pawl 520 to release the gear-withdrawal ratchet 510, the gear-withdrawal ratchet 510 is rotated in the opposite direction of the X-axis by the elastic restoring mechanism 230, in the process, the positioning pawl 530 is engaged with the gear-withdrawal ratchet 510 to fix the gear-withdrawal position of the gear-withdrawal ratchet 510, and after the gear-withdrawal lever 320 is restored, the first elastic restoring member 540 causes the release pawl 520 to be re-engaged in the gear-withdrawal ratchet 510, thereby realizing the gear-withdrawal process of the bicycle. The contact part 522 of the release pawl 520 pushes the positioning pawl 530 to rotate around the rotation axis of the release pawl, one of the locking ratchet 521 and the positioning ratchet 531 is meshed with the reverse ratchet 510 at the same time, so that the reverse gear stability of the gear shifting mechanism is ensured, the work is reliable, and the problem of gear jump is perfectly solved.
Example two
The release pawl 520 is fixedly connected with the positioning pawl 530 or integrally formed into a pawl member, the pawl member is hinged to the base 100, an elastic reset piece is arranged at the hinge position of the pawl member, a locking ratchet 521 and a positioning ratchet 531 are arranged on the pawl member, the poking assembly is connected with the pawl member, and the pawl member can be driven to rotate by means of hinge, abutting or other connection modes, so that one or only one of the locking ratchet 521 and the positioning ratchet 531 maintains the meshing state with the reverse gear ratchet 510. When the poking component pushes the pawl component to rotate, the positioning ratchet 531 on the pawl component is meshed with the reverse gear ratchet wheel in the process that the locking ratchet 521 on the pawl component is separated from the reverse gear pawl, until the reverse gear ratchet wheel is retracted to the previous gear, the pawl component rotates under the action of the elastic reset piece, the locking ratchet 521 is meshed with the reverse gear ratchet wheel 510 again, the positioning ratchet 531 is separated from the reverse gear ratchet wheel 510, and the same time that the release pawl 520 and the positioning ratchet 530 are meshed with the reverse gear ratchet wheel 510 can be realized.
With reference to fig. 14, a bicycle operating device in accordance with a second aspect of the present invention will be explained.
A bicycle control device comprises a handlebar 600 and a bicycle shifting mechanism according to the first aspect of the present invention, wherein the bicycle shifting mechanism is arranged on the handlebar 600, the two ends of the handlebar 600 are provided with downward ox horn handles, and the bicycle shifting mechanism is arranged on the ox horn handles. The bicycle gear shifting mechanism with high reliability is adopted to shift with the handlebar 600 in a matched mode, the gear shifting is smooth, the operability of the whole control device is improved, and the service life is long.
According to the bicycle disclosed by the embodiment of the third aspect of the invention, the bicycle comprises a bicycle body, wheels, a rear derailleur and the bicycle control device disclosed by the embodiment of the second aspect of the invention, the bicycle control device is connected with and controls the rear derailleur through a gear shifting wire, and the adjusting chain of the rear derailleur is switched among different chain wheels to change a driving gear, so that the bicycle has good control coordination performance.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (4)
1. A bicycle shift mechanism, comprising:
A base (100);
the winding assembly comprises a rotating shaft (210) and a winding disc (220) fixedly arranged on the rotating shaft (210), the rotating shaft (210) is rotatably connected to the base (100), and an elastic reset mechanism (230) is arranged at the rotating connection part of the rotating shaft (210) and the base (100);
the stirring assembly is rotationally connected to the rotating shaft (210);
the gear feeding assembly (400) is arranged on the rotating shaft (210);
The gear-withdrawing assembly (500), the gear-withdrawing assembly (500) comprises a gear-withdrawing ratchet wheel (510), a release pawl (520) and a positioning pawl (530), the gear-withdrawing ratchet wheel (510) is fixedly arranged on the rotating shaft (210), and the release pawl (520) and the positioning pawl (530) are arranged on the base (100);
wherein the poking component is connected with the release pawl (520)/the positioning pawl (530), the release pawl (520) is connected with the positioning pawl (530), and at the same time, one and only one of the release pawl (520) and the positioning pawl (530) is meshed with the gear reversing ratchet wheel (510);
The release pawl (520) and the positioning pawl (530) are hinged on the base (100), a first elastic reset piece (540) is arranged at the hinge position of the release pawl (520) and the base (100), a second elastic reset piece (550) is arranged at the hinge position of the positioning pawl (530) and the base (100), a contact part (522) abutted with the positioning pawl (530) is arranged on the release pawl (520), the second elastic reset piece (550) can push the positioning pawl (530) to be meshed with the reverse gear ratchet (510), the first elastic reset piece (540) can overcome the elastic force of the second elastic reset piece (550) to enable the release pawl (520) to be meshed with the reverse gear ratchet (510) and enable the positioning pawl (530) to be separated from the reverse gear ratchet (510), the release pawl (520) is abutted with the release pawl (520) and can push the release pawl (520) to be meshed with the reverse gear ratchet (510), and the positioning pawl (522) is separated from the reverse gear ratchet (510);
the gear shifting mechanism is characterized in that a gear shifting rod (320) and a gear shifting piece (310) are arranged on the gear shifting assembly, the gear shifting piece (310) comprises a first switching part (311), a second switching part (312) and a connecting piece (313), the connecting piece (313) is fixedly connected between the first switching part (311) and the second switching part (312), the first switching part (311) and the second switching part (312) are arranged on the rotating shaft (210) along the axial direction, the gear shifting rod (320) is arranged on the first switching part (311), and the second switching part (312) comprises a thrust part (330) which is abutted with the contact part (522);
The first end of the release pawl (520) is provided with a gear-withdrawing ratchet, the thrust part (330) is abutted against the second end of the release pawl (520), the contact part (522) is positioned on the first end of the release pawl (520), the first end of the positioning pawl (530) is provided with a positioning ratchet (531), and the second end of the positioning pawl (530) is abutted against the contact part (522);
the gear feeding assembly (400) comprises a gear feeding ratchet wheel (410) and a gear feeding member, wherein the gear feeding ratchet wheel (410) is fixedly arranged on the rotating shaft (210), and the gear feeding member is provided with a gear feeding ratchet wheel meshed with the gear feeding ratchet wheel (410);
The gear feeding component comprises a locking piece (420), a switching block (430) and a gear feeding shifting rod (440), wherein the locking piece (420) is arranged on the rotating shaft (210), the switching block (430) is hinged to the inner side of the locking piece (420), the gear feeding shifting rod (440) is rotationally connected to the switching block (430), a gear feeding ratchet is arranged on one side of the switching block (430), a third elastic reset piece (450) is arranged in the switching block (430), the gear feeding ratchet is tightly propped against the gear feeding ratchet (410), and the rotation axis of the gear feeding shifting rod (440) is intersected with the rotation axis of the switching block (430); the rotating shaft (210) comprises a front half shaft (211) and a rear half shaft (212), an adapter sleeve (240) is sleeved on the front half shaft (211), the locking piece (420) is rotationally connected to the adapter sleeve (240), the cross section of the rear half shaft (212) is round-head rectangular, and mounting holes matched with the rear half shaft (212) are formed in the gear-reversing ratchet (510) and the gear-feeding ratchet (410).
2. The bicycle shifting mechanism according to claim 1, characterized in that the gear-in shift lever (440) is provided with a limit wedge (441), the locking piece (420) is provided with a wedge-shaped convex surface, a fourth elastic reset piece (460) is arranged at the rotation connection position of the gear-in shift lever (440) and the adapter piece (430), and the fourth elastic reset piece (460) enables the gear-in shift lever (440) to rotate and enables the limit wedge (441) to abut against the wedge-shaped convex surface.
3. A bicycle operating device, characterized by comprising a handlebar (600) and a bicycle shift mechanism according to claim 1 or 2, which is arranged on the handlebar (600).
4. A bicycle comprising the bicycle operating device of claim 3.
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| CN202011503459.5A CN113978602B (en) | 2020-12-18 | 2020-12-18 | Bicycle, bicycle control device and bicycle gear shifting mechanism thereof |
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| CN202011503459.5A CN113978602B (en) | 2020-12-18 | 2020-12-18 | Bicycle, bicycle control device and bicycle gear shifting mechanism thereof |
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| CN113978602B true CN113978602B (en) | 2024-09-03 |
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| CN114715327B (en) * | 2022-04-07 | 2024-05-24 | 速瑞达自行车零件（佛山）有限公司 | Speed-changing operating device and bicycle |
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| CN214565988U (en) * | 2020-12-18 | 2021-11-02 | 珠海蓝图控制器科技有限公司 | Bicycle, bicycle control device and bicycle gear shifting mechanism thereof |
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| DE102008048134C5 (en) * | 2008-09-20 | 2018-09-27 | Sram Deutschland Gmbh | Switch for actuating a transmission on a bicycle |
| US9919760B2 (en) * | 2014-03-12 | 2018-03-20 | Shimano Inc. | Bicycle operating device |
| US10131406B2 (en) * | 2015-09-10 | 2018-11-20 | Shimano Inc. | Bicycle operating device |
| CN209192147U (en) * | 2018-10-12 | 2019-08-02 | 珠海蓝图控制器科技有限公司 | Bicycle selector |
| CN109808824B (en) * | 2019-02-27 | 2024-04-09 | 珠海蓝图运动科技股份有限公司 | Bicycle gearshift and bicycle speed changing system |
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| CN214565988U (en) * | 2020-12-18 | 2021-11-02 | 珠海蓝图控制器科技有限公司 | Bicycle, bicycle control device and bicycle gear shifting mechanism thereof |
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