CN113978602A - Bicycle, bicycle control device and bicycle gear shifting mechanism thereof - Google Patents

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 rotatably connected to the base, and an elastic reset mechanism is arranged at the rotating connection position of the rotating shaft and the base; the shifting assembly is rotatably connected to the rotating shaft; the gear-in unit is arranged on the rotating shaft; the gear withdrawing assembly comprises a gear withdrawing ratchet wheel, a release pawl and a positioning pawl, a first elastic resetting piece is arranged at the hinged position of the release pawl and the base, and a second elastic resetting piece is arranged at the hinged position of the positioning pawl and the base. The gear shifting mechanism designed by the invention has smooth and natural gear shifting, so that the internal structures of the gear shifting mechanism have 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

Bicycle, bicycle control device and bicycle gear shifting mechanism thereof

Technical Field

The invention relates to the technical field of bicycles, in particular to a bicycle, a bicycle operating device and a bicycle gear shifting mechanism.

Background

Bicycles on the market are generally equipped with shifters. In order to adapt to different road conditions, such as uphill, downhill, level road, mountain road or uneven road, the gear shifter changes the meshing 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 shifting rod, the chain is meshed with the high-gear chain wheel of the previous stage or the low-gear chain wheel of the next stage, and the transmission ratio between the wheels is changed to adapt to the running environment.

In the existing bicycles, the gear shifter is generally composed of a ratchet wheel and three pawls, wherein the three pawls comprise a releasing pawl, a positioning pawl and a gear entering pawl. When the gear is shifted, the locking ratchet wheel is unlocked, the ratchet wheel returns under the action of the return spring, when the gear is shifted back to the initial position, the positioning pawl clamps the ratchet wheel, the releasing pawl resets at the moment, the ratchet wheel is locked again, and the gear shifting of the ratchet wheel is finished. However, in the gear-reversing process, the locking ratchet wheel directly returns to the initial state, and gear shifting needs to be carried out again one by one, which is very troublesome.

In other current selector, the structure that can realize the gear advance and retreat one by one is all comparatively complicated, adopts single pawl chucking meshing when moving back, can have the state of shifting irregularity, appears the gear disengaging phenomenon very easily, leads to the problem that the back derailleur appears jumping the shelves, has the potential safety hazard.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a bicycle gear shifting mechanism which improves the gear-shifting smoothness of a bicycle and realizes sequential gear shifting.

The invention also provides a bicycle control device with the bicycle gear shifting mechanism.

The invention further provides a bicycle with the bicycle operating device.

A bicycle in accordance with an embodiment of a first aspect of the present invention includes: a base; the winding assembly comprises a rotating shaft and a winding disc fixedly arranged on the rotating shaft, the rotating shaft is rotatably connected to the base, and an elastic reset mechanism is arranged at the rotating connection position of the rotating shaft and the base; the shifting assembly is rotatably connected to the rotating shaft; the gear shifting assembly is arranged on the rotating shaft; the gear reversing assembly comprises a gear reversing ratchet wheel, a releasing pawl and a positioning pawl, the gear reversing ratchet wheel is fixedly arranged on the rotating shaft, and the releasing pawl and the positioning pawl are arranged on the base; the toggle assembly is connected with the release pawl/the positioning pawl, the release pawl is connected with the positioning pawl, and only one of the release pawl and the positioning pawl is meshed with the gear-reversing ratchet wheel at the same time.

The bicycle gear shifting mechanism provided by the embodiment of the invention at least has the following beneficial effects: when the gear shifting mechanism is shifted, the shifting assembly pushes the release pawl to leave the shift pawl, the rotating shaft drives the shift ratchet to rotate under the action of the elastic reset mechanism, the connected positioning pawl is rotationally meshed with the shift ratchet in the releasing process, the positioning pawl locks the rotating shaft, the rotating angle of the shift ratchet is smaller than or equal to the angle of one shift tooth, when the shifting assembly is loosened, the release pawl is re-meshed with the shift ratchet, the release pawl is clamped on the next shift ratchet of the shift ratchet at the moment, the positioning pawl is separated from the shift ratchet, the single pawl releases the shift into double pawl release, only one of the release pawl and the positioning pawl is matched with the shift ratchet at the same time, the shift ratchet is always kept in a meshed state and is locked by the release pawl and the positioning pawl, the shift is smooth and natural, and the internal structures of the gear shifting mechanism have better coordination, the internal structure is compact, and stability is strong, has compensatied the problem that old structure can not adapt to more gears, makes the gear shifting process more reliable.

According to some embodiments of the invention, the release pawl and the positioning pawl are both hinged on the base, a first elastic reset piece is arranged at the hinged position of the release pawl and the base, a second elastic reset piece is arranged at the hinged position of the positioning pawl and the base, the release pawl is provided with a contact part which is abutted against the positioning pawl, the second elastic reset piece can push the positioning pawl to be meshed on the gear-withdrawing ratchet wheel, the first elastic reset piece can overcome the elastic force of the second elastic reset piece to enable the release pawl to be meshed with the gear-withdrawing ratchet wheel and enable the positioning claw to be separated from the gear-withdrawing ratchet wheel, the toggle assembly is abutted against the release pawl and can push the release pawl to be meshed with the gear-withdrawing ratchet wheel, and at the moment, the contact part pushes the positioning pawl to be separated from the gear-withdrawing ratchet wheel.

As can be seen, in a preferred embodiment of the present invention, after the toggle assembly is released, the release pawl is reengaged on the back-shift ratchet under the action of the first elastic resetting member, the first elastic resetting member overcomes the elastic force of the second elastic resetting member to disengage the positioning pawl from the back-shift ratchet, and the release pawl is clamped on the next back-shift ratchet of the back-shift ratchet.

According to some embodiments of the invention, the shifting assembly is provided with a shift lever and a shifting sheet, the shifting sheet comprises a first switching part, a second switching part and a connecting piece, the connecting piece is fixedly connected between the first switching part and the second switching part, the first switching part and the second switching part are arranged on the rotating shaft along the axial direction, the shift lever is arranged on the first switching part, and the second switching part comprises a thrust part abutted against the contact part.

Therefore, the shifting pawl is one of the preferred structures of the shifting assembly, the shifting rod is shifted to enable the shifting piece to rotate, the contact part on the release pawl is pushed by the thrust part, and the release pawl is rotationally buckled on the shifting ratchet wheel.

According to some embodiments of the invention, the first end of the release pawl is provided with a reverse ratchet, the pushing portion abuts 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 abuts on the contact portion.

It can be seen from the above that, for 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 back-shift ratchet approaches the back-shift ratchet around the hinge portion and is engaged on the back-shift ratchet, the release pawl and the positioning pawl are linked with each other, and one pawl is always leaned on the back-shift pawl during the back-shift process.

According to some embodiments of the present invention, the gear-in assembly includes a gear-in ratchet fixedly disposed on the rotating shaft and a gear-in member having a gear-in ratchet engaged with the gear-in ratchet.

Therefore, the gear entering assembly utilizes a ratchet structure, when the gear entering ratchet wheel advances for one gear, the release pawl locks the gear retreating ratchet wheel to fix the position of the rotating shaft, so that the gear entering ratchet wheel is fixed, the two ratchet wheels are coordinated with each other, the gear entering reliability is high, and smooth gear shifting is realized.

According to some embodiments of the present invention, the shift component includes a lock catch piece, a transfer block and a shift lever, the lock catch piece is disposed on the rotating shaft, the transfer block is hinged inside the lock catch piece, the shift lever is rotatably connected to the transfer block, the shift ratchet is disposed on one side of the transfer block, a third elastic reset piece is disposed in the transfer block, the third elastic reset piece enables the shift ratchet to be tightly pressed against the shift ratchet, and a rotation axis of the shift lever intersects with a rotation axis of the transfer block.

It can be seen from above that, the switching piece meshes with the ratchet that advances that keeps off of hasp piece inboard, stirs the driving lever that advances to keep off, advances to keep off the driving lever and promotes the switching piece and advance to keep off the ratchet along advancing to keep off the direction and advancing to keep off, after advancing to keep off and accomplish, releases pawl locking ratchet that moves back, fixed pivot position, advances to keep off the driving lever and withdraw from and engage again in the ratchet position of next gear from advancing the ratchet that keeps off under the effect of piece that resets.

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 lock catch piece is rotatably connected on 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-returning ratchet wheel and the gear-entering ratchet wheel.

It can be seen that, one of the preferable structures of the rotating shaft is to provide a structural foundation for the lock catch piece to be rotatably connected to the rotating shaft, and the gear shifting member can rotate relative to the rotating shaft so as to be reset to the next gear after the gear shifting is completed.

According to some embodiments of the invention, the gear shift lever is provided with a limiting wedge block, the lock catch piece is provided with a wedge-shaped convex surface, a rotary joint of the gear shift lever and the transfer block is provided with a fourth elastic reset piece, and the fourth elastic reset piece enables the gear shift lever to rotate and enables the limiting wedge block to abut against the wedge-shaped convex surface.

Therefore, the limiting wedge block is matched with the wedge-shaped convex surface to limit the maximum rotation angle of the gear shifting rod so as to limit the gear shifting ratchet to shift one gear at a time, and the gear jumping phenomenon is avoided.

According to some embodiments of the present invention, a fifth elastic restoring element is disposed on the latch plate, and the fifth elastic restoring element is connected between the base and the latch plate.

Therefore, the fifth elastic reset piece keeps the relative position of the lock catch piece and the base so as to match the switching block and the gear shifting operation of the gear shifting rod.

A bicycle operating device in accordance with an embodiment of a second aspect of the present invention includes a handlebar and a bicycle shifting mechanism as set forth in any of the above, the bicycle shifting mechanism being disposed on the handlebar.

The bicycle control device according to the embodiment of the invention has at least the following beneficial effects: adopt above-mentioned bicycle gearshift of strong reliability, cooperate with the handlebar and shift, whole handlebar structure is compacter, shifts smoothly, and long service life.

A bicycle in accordance with an embodiment of the third aspect of the present invention includes the bicycle operating device described above.

The bicycle provided by the embodiment of the invention at least has the following beneficial effects: the handlebar with the gear shifting mechanism is matched with a rear derailleur on a bicycle body to assist in finishing a smooth gear shifting process, and good control coordination is achieved.

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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an overall schematic structural view of a bicycle shifting mechanism in accordance with an embodiment of a first aspect of the present invention;

FIG. 2 is an exploded schematic view of the bicycle shift mechanism illustrated in FIG. 1;

FIG. 3 is an assembled view of the winding assembly, the toggle assembly, the shift assembly, the advance assembly and the reverse 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 gear assembly shown in FIG. 3;

FIG. 6 is a schematic structural 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 structural view of the release pawl shown in FIG. 5;

FIG. 9 is a top view of the overall structure shown in FIG. 3;

FIG. 10 is a schematic view of the structure of FIG. 9 in the direction A-A;

FIG. 11 is a schematic structural view of the shift assembly of FIG. 3 in an operating state;

FIG. 12 is a schematic view of the kick-off assembly shown in FIG. 3 in a locked position;

FIG. 13 is a schematic structural view of the reverse assembly shown in FIG. 3 in a released state;

FIG. 14 is a general structural schematic view of a bicycle operating device in accordance with an embodiment of the second aspect of the present invention.

The attached drawings are marked as follows:

a base 100, 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 dial piece 310, a first transfer part 311, a second transfer part 312, a connecting part 313, a gear-reversing lever 320 and a thrust part 330;

the gear shifting assembly 400, the gear shifting ratchet wheel 410, the lock catch piece 420, the wedge-shaped convex surface 421, the adapter block 430, the gear shifting ratchet 431, the gear shifting lever 440, the limiting wedge 441, the third elastic reset piece 450, the fourth elastic reset piece 460 and the fifth elastic reset piece 470;

the gear shifting device comprises a gear shifting component 500, a gear shifting ratchet 510, a releasing pawl 520, a locking ratchet 521, a contact part 522, a positioning pawl 530, a positioning ratchet 531, a first elastic resetting piece 540 and a second elastic resetting piece 550;

a handlebar 600.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and larger, smaller, larger, etc. are understood as excluding the present number, and larger, smaller, inner, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood 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 otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 11 together, a bicycle shifting mechanism in accordance with an embodiment of the first aspect of the present invention will now be explained.

Referring to fig. 1 to 4, a bicycle shifting mechanism includes a base 100, a winding assembly including a rotating shaft 210 and a winding plate 220, a striking assembly, a shift assembly 400 and a shift assembly 500, the shift assembly 500 including a shift ratchet 510, a release pawl 520 and a positioning pawl 530.

Be equipped with in the base 100 and hold the chamber, pivot 210 sets up and holds the intracavity and rotate with base 100 and be connected, its rotation junction is provided with first bearing, take-up reel 220 is fixed to be set up in pivot 210, be equipped with the connector lug on the take-up reel 220, be equipped with the through-hole in the connector lug, the line of shifting passes the through-hole and encircles on take-up reel 220, still be equipped with the location arch on the take-up reel 220 simultaneously, this location arch can the butt on base 100, restriction take-up reel 220 is at the initial position on base 100. An elastic reset mechanism 230 is arranged at the rotary connection position of the rotary shaft 210 and the base 100, one end of the elastic reset mechanism 230 is connected to the base 100, the other end of the elastic reset mechanism 230 is connected to the rotary shaft 210, when the rotary shaft 210 moves relative to the base 100, the elastic reset mechanism 230 stores deformation potential energy, the deformation potential energy is converted into kinetic energy during retraction, and the rotary shaft 210 has rotation capacity. The elastic return mechanism 230 may be a return spring.

Example one

Referring to fig. 5, the gear-reversing ratchet 510 is fixedly disposed on the rotating shaft 210, and rotates in the same direction and at the same speed as the rotating shaft 210, the releasing pawl 520 and the positioning pawl 530 are both hinged to the base 100, the base 100 is provided with a first hinge hole and a second hinge hole, the first hinge hole and the second hinge hole are respectively provided with a first pin and a second pin, and the first pin and the second pin respectively penetrate through the middle position of the releasing 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-reversing ratchet 510, the gear-reversing ratchet 510 is provided with a plurality of ratchets, gear tooth spaces are formed between adjacent ratchets, and each gear tooth space corresponds to a driving gear. The hinged part of the releasing pawl 520 and the base 100 is provided with a first elastic resetting piece 540, the first elastic resetting piece 540 is used for releasing the resetting energy storage of the pawl 520 and pushing the releasing pawl 520 to be meshed with the gear-reversing ratchet wheel 510, the hinged part of the positioning pawl 530 and the base 100 is provided with a second elastic resetting piece 550, and the second elastic resetting piece 550 is used for resetting energy storage and pushing 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, and both the locking ratchet 521 and the positioning ratchet 531 can be engaged with gear tooth grooves of the gear-reversing ratchet 510. The locking ratchet 521 and the positioning ratchet 531 are disposed on the outer circumferential side of the shift ratchet 510, and in this embodiment, the locking ratchet 521 and the positioning ratchet 531 are respectively located on both sides of the rotational axis of the positioning ratchet.

The first elastic reset piece 540 and the second elastic reset piece 550 have opposite force application directions, and the release pawl 520 is provided with a contact part 522 abutted against the positioning pawl 530, so that the two pawls can swing in the same direction, and the toggle assembly is abutted against the release pawl 520. In a non-gear-reversing state, the release pawl 520 is engaged with the gear-reversing ratchet 510, the first elastic resetting piece 540 overcomes the elastic force of the second elastic resetting piece 550, and the contact part 522 pushes the positioning pawl 530 to disengage from the gear-reversing pawl; during the gear shifting process, the toggle assembly pushes the release pawl 520 to rotate, so that the locking ratchet 521 is disengaged from the gear shifting ratchet 510, the positioning pawl 530 rotates, and the positioning ratchet 531 is engaged with the gear shifting ratchet 510.

Specifically, referring to fig. 6, the shifting assembly is provided with a shift lever 320 and a shifting piece 310, the shifting piece 310 includes a first switching portion 311, a second switching portion 312 and a connecting piece, the first switching portion 311 and the second switching portion 312 are arranged in parallel, and round holes are formed in the middle portions of the first switching portion 311 and the second switching portion 312 and used for being rotatably connected to the rotating shaft 210. The connecting piece is fixedly connected with the first transfer portion 311 and the second transfer portion 312, the first transfer portion 311, the connecting piece and the second transfer portion 312 can be formed in a welding or integrated forming mode, the whole poking piece 310 is in a bridge shape, a pushing portion 330 is arranged on the poking piece 310, the pushing portion is arranged on the second transfer portion 312 and is abutted against the contact portion 522, and the pushing portion is abutted against the contact portion 522 of the release pawl 520 and is a force application portion of the poking piece 310.

In a preferred embodiment, referring to fig. 7 and 8, the release pawl 520 is hinged to the base 100 at a middle portion thereof, and has a reverse ratchet tooth provided at a first end portion thereof, a contact portion 522 provided at a second end portion of the release pawl 520, the reverse ratchet tooth and the contact portion 522 being oppositely provided at both ends of the hinge portion of the release pawl 520, and the reverse ratchet 510 rotates in the same direction about the hinge portion to disengage/engage the reverse ratchet 510 when the contact portion 522 rotates. 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 engaged 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 disengaged/engaged on the gear-reversing ratchet 510.

The first elastic resetting piece 540 and the second elastic resetting piece 550 are torsion springs, the first end portions of the first elastic resetting piece 540 and the second elastic resetting piece 550 are fixed on the base 100, the locking limiting portion clamped with the second end portion of the first elastic resetting piece 540 is arranged on the releasing pawl 520, and the positioning limiting portion clamped with the second end portion of the second elastic resetting piece 550 is arranged on the positioning pawl 530.

Referring to fig. 9 and 10, the gear-in assembly 400 includes a gear-in ratchet 410 and a gear-in member, the gear-in ratchet 410 is fixedly disposed on the rotating shaft 210, the gear-in member is provided with a gear-in ratchet 431 engaged with the gear-in ratchet 410, the gear-in ratchet 410 is fixedly disposed on the rotating shaft 210, and the gear-in member is provided with a gear-in ratchet 431 engaged with the gear-in ratchet 410. The gear-in component utilizes the gear-in ratchet 431 to push the gear-in ratchet 410 to rotate forward, after rotating a gear angle, because the ratchet structure is the working principle that the gear can rotate forward and lock backward, the gear-out ratchet 510 rotates the same angle in the same direction under the action of the same rotating shaft 210, the releasing pawl 520 clamps the gear-out ratchet 510 after rotating, the winding disc 220 drives the rear derailleur to work, and the gear-in is completed.

The specific structure of the blocking member comprises a lock catch piece 420, a transfer block 430 and a blocking lifting lever 440, wherein the lock catch piece 420 is arranged on the rotating shaft 210, a hinge portion which is oppositely arranged is arranged on the hinge block, the transfer block 430 is hinged on the lock catch piece 420 through the hinge portion, a hinge hole is arranged on the lock catch piece 420, the hinge portion is in a round-head rectangular shape, and the arc end of the hinge hole is matched with the hinge hole. The gear shift lever 440 is rotatably connected to the switching block 430, the rotational connection is connected by a pin, a third elastic reset piece 450 and a fourth elastic reset piece 460 are arranged in the switching block 430, the third elastic reset piece 450 and the fourth elastic reset piece 460 can be torsional springs, the third elastic reset piece 450 is connected between the rotating block and the lock catch piece 420, the gear shift ratchet 431 on the switching block 430 is tightly pressed against the gear shift ratchet 410, the fourth elastic reset piece 460 is sleeved on the pin and connected between the switching block 430 and the gear shift lever 440 for pushing the gear shift lever 440 to reset, the gear shift lever 440 is provided with a limiting wedge 441, the lock catch piece 420 is provided with a wedge-shaped convex surface 421, the rotational connection between the gear shift lever 440 and the switching block 430 is provided with the fourth elastic reset piece 460, and the gear shift lever 440 is rotated by the fourth elastic reset piece 460 and is abutted against the limiting wedge on the wedge-shaped convex surface 421. The brake lever 110 is arranged on the base 100, the brake lever 110 is arranged on the outer side of the shift lever 440 and is located in the shift direction, a concave cavity matched with the outer contour of the auxiliary shift lever is arranged on the brake lever 110, the shift lever 440 is sleeved into the concave cavity when shifting the shift lever, and the concave cavity plays a limiting role in limiting the shift lever 440.

The gear-in ratchet 431 is arranged at one side of the adapting block 430, the rotation axis of the gear-in shift lever 440 is intersected with the rotation axis of the adapting block 430, the gear-in shift lever 440 realizes spherical rotation under the action of the adapting block 430, and the main function is the rotation process of the adapting block 430 around the lock catch sheet 420, referring to fig. 1, the gear-in shift lever 440 applies force to the adapting block 430 to rotate, the adapting block 430 rotates along the gear-in direction of the X direction, the gear-in ratchet 410 just passes through one gear position when reaching the cavity, 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 retract, and the gear-in shift lever 440 and the adapting block 430 retract to the initial position under the action of the third elastic reset piece 450 and the fourth elastic reset piece 460 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 is circular, the front half shaft 211 is sleeved with an adapter sleeve 240, a lock catch piece 420 is rotatably connected to the adapter sleeve 240, the adapter sleeve 240 is used for rotatably 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 form a straight surface on the rotating shaft 210, mounting holes matched with the rear half shaft 212 are formed in the gear returning ratchet wheel 510 and the gear entering ratchet wheel 410, the cross section of each mounting hole is also a round-head rectangle, and synchronous rotation of the gear entering ratchet wheel 410, the gear returning ratchet wheel 510 and the rotating shaft 210 is limited. The gear-in ratchet wheel 410 and the gear-out ratchet wheel 510 can be fixed on the rotating shaft 210 through axial assembly between shafts, or can be fixed on the rotating shaft 210 through other methods.

In some embodiments of the present invention, the locking plate 420 is provided with a fifth elastic restoring member 470, and the positioning elastic restoring member is connected between the base 100 and the locking plate 420, so that the fifth elastic restoring member 470 always maintains the relative position of the locking plate 420 and the base 100 while the rotating shaft 210 rotates, so as to cooperate with the shift operation of the transfer block 430 and the shift lever 440. In addition, the locking piece 420 can be fixedly connected with the base 100, and the locking piece 420 does not synchronously rotate 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 the gear shifting, the gear shifting lever 440 pushes the gear shifting ratchet 410 to rotate along the X-axis direction, and simultaneously drives the gear shifting rotating shaft 210 to rotate via the rotating shaft 210, after a gear shifting is performed, the release pawl 520 clamps the gear shifting rotating shaft 210 in the gear shifting, the gear shifting lever 440 resets and retracts the switching block 430 to the next gear shifting, and the gear shifting is completed; referring to fig. 12 and 13, during the reverse gear, the reverse gear lever 320 is shifted to make the release pawl 520 release the reverse gear ratchet 510, the reverse gear ratchet 510 rotates towards the opposite direction of the X-axis under the action of the elastic reset mechanism 230, in the process, the positioning pawl 530 is engaged with the reverse gear ratchet 510 to fix the reverse gear position of the reverse gear ratchet 510, and after the reverse gear lever 320 is reset, the first elastic reset piece 540 makes the release pawl 520 re-engaged in the reverse gear ratchet 510, so that the reverse gear process of the bicycle is realized. The contact part 522 of the release pawl 520 pushes the positioning pawl 530 to rotate around the rotating shaft thereof, and only one of the locking ratchet 521 and the positioning ratchet 531 is meshed with the gear-reversing ratchet 510 at the same time, so that the gear-reversing smoothness of the gear shifting mechanism is ensured, the work is reliable, and the problem of gear jumping is perfectly solved.

Example two

The release pawl 520 and the positioning pawl 530 are fixedly connected or integrally formed to form a pawl member, the pawl member is hinged to the base 100, an elastic reset piece is arranged at the hinged position of the pawl member, the pawl member is provided with a locking ratchet 521 and a positioning ratchet 531, the toggle assembly is connected with the pawl member, and the pawl member can be driven to rotate through hinging, abutting or other connection modes, so that the locking ratchet 521 and the positioning ratchet 531 have one or only one meshing state of the locking ratchet 521 and the positioning ratchet 531, and the ratchet 510 can be kept and retreated. When the toggle assembly pushes the pawl member to rotate, so that the locking ratchet 521 on the pawl member is disengaged from the gear-reversing pawl, the positioning ratchet 531 on the pawl member is engaged with the gear-reversing ratchet until the gear-reversing ratchet is reversed to the previous gear, the pawl member rotates under the action of the elastic reset piece, the locking ratchet 521 is re-engaged with the gear-reversing ratchet 510, the positioning pawl 531 is disengaged from the gear-reversing ratchet 510, and similarly, one or more than one of the release pawl 520 and the positioning pawl 530 can be engaged with the gear-reversing ratchet 510 at the same time.

Referring to fig. 14, a bicycle operating device in accordance with an embodiment of the second aspect of the present invention will now be explained.

A bicycle control device comprises a handlebar 600 and a bicycle shifting mechanism according to an embodiment of the first aspect of the present invention, the bicycle shifting mechanism is disposed on the handlebar 600, both ends of the handlebar 600 are provided with horn shaped handles facing downward, and the bicycle shifting mechanism is disposed on the horn shaped handles. Adopt the strong bicycle gearshift of reliability, shift with handlebar 600 cooperation, it is smooth-going to shift, improves whole operating device's maneuverability, long service life.

The bicycle comprises a bicycle body, a wheel, a rear derailleur and the bicycle operating device, wherein the bicycle operating device is connected with and controls the rear derailleur through a shifting wire, the rear derailleur adjusts a chain to be switched among different sprockets, a driving gear is changed, and good operation coordination performance is achieved.

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 those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. A bicycle shifting 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 position of the rotating shaft (210) and the base (100);

the poking component is rotationally connected to the rotating shaft (210);

the gear shifting assembly (400) is arranged on the rotating shaft (210);

the gear reversing assembly (500) comprises a gear reversing ratchet wheel (510), a releasing pawl (520) and a positioning pawl (530), the gear reversing ratchet wheel (510) is fixedly arranged on the rotating shaft (210), and the releasing pawl (520) and the positioning pawl (530) are arranged on the base (100);

wherein the toggle assembly is connected to the release pawl (520)/the positioning pawl (530), the release pawl (520) being connected to the positioning pawl (530), and only one and the same release pawl (520) and positioning pawl (530) being engaged with the reverse gear ratchet (510) at a time.

2. The bicycle shifting mechanism according to claim 1, wherein the release pawl (520) and the positioning pawl (530) are both hinged to the base (100), a first elastic reset member (540) is disposed at a hinge of the release pawl (520) and the base (100), a second elastic reset member (550) is disposed at a hinge of the positioning pawl (530) and the base (100), a contact portion (522) abutting against the positioning pawl (530) is disposed on the release pawl (520), the second elastic reset member (550) can push the positioning pawl (530) to engage with the shift-reversing ratchet (510), the first elastic reset member (540) can overcome an elastic force of the second elastic reset member (550) to engage the release pawl (520) with the shift-reversing ratchet (510) and disengage the positioning pawl from the shift-reversing ratchet (510), the toggle assembly abuts against the release pawl (520) and can push the release pawl (520) to be engaged with the gear-reversing ratchet wheel (510), and at the moment, the contact part (522) pushes the positioning pawl (530) to be disengaged from the gear-reversing ratchet wheel (510).

3. The bicycle shifting mechanism according to claim 2, wherein a shift lever (320) and a shift plate (310) are disposed on the shift assembly, the shift plate (310) includes a first switching portion (311), a second switching portion (312) and a connecting member (313), the connecting member (313) is fixedly connected between the first switching portion (311) and the second switching portion (312), the first switching portion (311) and the second switching portion (312) are disposed on the rotation shaft (210) along an axial direction, the shift lever (320) is disposed on the first switching portion (311), and the second switching portion (312) includes a pushing portion (330) abutted against the contact portion (522).

4. The bicycle shifting mechanism according to claim 3, wherein a first end of the release pawl (520) is provided with a reverse gear ratchet, the pushing portion (330) abuts on a second end of the release pawl (520), the contact portion (522) is located on the first end of the release pawl (520), a first end of the positioning pawl (530) is provided with a positioning ratchet (531), and a second end of the positioning pawl (530) abuts on the contact portion (522).

5. The bicycle shifting mechanism according to claim 1, wherein the shift assembly (400) comprises a shift ratchet (410) and a shift member, the shift ratchet (410) is fixedly disposed on the rotation shaft (210), and the shift member is provided with a shift ratchet (431) engaged with the shift ratchet (410).

6. The bicycle shifting mechanism according to claim 5, wherein the shift member comprises a locking plate (420), a transfer block (430) and a shift lever (440), the locking plate (420) is disposed on the rotating shaft (210), the transfer block (430) is hinged inside the locking plate (420), the shift lever (440) is rotatably connected to the transfer block (430), the shift ratchet (431) is disposed on one side of the transfer block (430), a third elastic reset member (450) is disposed inside the transfer block (430), the third elastic reset member (450) enables the shift ratchet (431) to be tightly pressed against the shift ratchet (410), and a rotation axis of the shift lever (440) intersects with a rotation axis of the transfer block (430).

7. The bicycle shifting mechanism according to claim 6, wherein 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 rotatably 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 wheel (510) and the gear-shifting ratchet wheel (410).

8. The bicycle shifting mechanism according to claim 6, wherein a limiting wedge block (441) is disposed on the shift lever (440), a wedge-shaped convex surface (421) is disposed on the locking piece (420), a fourth elastic reset piece (460) is disposed at a rotational connection position of the shift lever (440) and the transfer block (430), and the fourth elastic reset piece (460) enables the shift lever (440) to rotate and enables the limiting wedge block (441) to abut against the wedge-shaped convex surface (421).

9. A bicycle operating device, characterized by comprising a handlebar (600) and a bicycle shifting mechanism according to any of claims 1 to 8, which is arranged on the handlebar (600).

10. A bicycle comprising a bicycle steering device according to claim 9.

Images