CN106904246B - Bicycle gear shifter - Google Patents
Bicycle gear shifter Download PDFInfo
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- CN106904246B CN106904246B CN201710250053.2A CN201710250053A CN106904246B CN 106904246 B CN106904246 B CN 106904246B CN 201710250053 A CN201710250053 A CN 201710250053A CN 106904246 B CN106904246 B CN 106904246B
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- pawl
- ratchet
- bicycle shifter
- positioning
- spring
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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
本发明提供一种自行车换挡器，其中，包括基座、绕线盘、棘轮构件、第一固定盘、棘爪构件和退档拨片，绕线盘与基座内的连接轴可转动地连接，绕线盘上设置有定位键，棘轮构件具有棘齿且棘轮构件的中部设置有与定位槽配合连接的定位槽，第一固定盘与基座固定连接，第一固定盘设置有第一凸起，第一凸起上设置有第一销轴，棘爪构件与第一销轴可转动地连接，棘爪构件具有棘爪部和与棘爪部连接的第一联动部，棘爪部设置有锁紧棘爪和定位棘爪，棘齿与锁紧棘爪或定位棘爪啮合，退档拨片与连接轴可转动地连接，退档拨片设置有与第一联动部邻接的第二联动部。该自行车换挡器具有结构紧凑、工作可靠性好、换挡稳定性好且能够防止换挡过程中出现脱档的优点。
The present invention provides a bicycle shifter, which comprises a base, a winding reel, a ratchet member, a first fixed disc, a pawl member and a gear shift paddle, and the winding reel is rotatably connected to a connecting shaft in the base. connection, a positioning key is arranged on the winding disk, the ratchet member has ratchet teeth, and the middle part of the ratchet member is provided with a positioning groove that is matched with the positioning groove, the first fixed disk is fixedly connected with the base, and the first fixed disk is provided with a first Protrusion, the first protrusion is provided with a first pin shaft, the pawl member is rotatably connected with the first pin shaft, the pawl member has a pawl part and a first linkage part connected with the pawl part, the pawl part A locking pawl and a positioning pawl are provided, the ratchet teeth are engaged with the locking pawl or the positioning pawl, the gear-back paddle is rotatably connected with the connecting shaft, and the gear-back paddle is provided with a second link adjacent to the first linkage part. Second Link Department. The bicycle shifter has the advantages of compact structure, good working reliability, good shifting stability, and being able to prevent the gear shifting during the shifting process.
Description
Technical Field
The invention relates to the technical field of bicycle speed change, in particular to a bicycle shifter.
Background
At present, most bicycles on the market are equipped with a speed changing system, wherein the mountain bike and the road bike take the speed changing system as an indispensable part. The bicycle speed changing system has the function of changing the speed of a bicycle by adjusting a bicycle gear shifter arranged at the position of a handlebar to change the matching of gear plates with different sizes at the front and the back. Specifically, when the bicycle is shifted, the shift lever is shifted or the shift lever is shifted to enable the bicycle shifter to adjust the tension condition of the speed changing line, so that the positions of the front derailleur and the rear derailleur are adjusted, the chain is meshed with different gears on the front fluted disc and the rear fluted disc, and the bicycle is further adjusted.
However, the shifting structure of the current bicycle shifter is generally complex, and a common bicycle shifter comprises a gear-shifting pawl, a locking pawl and a positioning pawl, when a bicycle is operated to shift backward, the locking pawl releases the locking of a ratchet wheel in the bicycle shifter, at this time, the ratchet wheel is retracted under the action of a return spring, and the positioning pawl rotates while the ratchet wheel is retracted until the positioning pawl is buckled on the ratchet wheel, so that the ratchet wheel is prevented from continuing to retract. After the positioning pawl is buckled on the ratchet wheel, the locking pawl is reset, and at the moment, the locking pawl rotates and is buckled on the ratchet wheel to lock the ratchet wheel again, so that the ratchet wheel is prevented from continuously returning. When the locking pawl locks the ratchet again, the positioning pawl resets, and at the moment, the positioning pawl rotates and releases the locking of the ratchet. When the positioning pawl and the locking pawl return to the initial positions, the bicycle is shifted backwards, the winder and the ratchet wheel which are fixedly connected with the ratchet wheel rotate together according to the preset stroke, the winder releases the speed change line, and the position of the front derailleur or the rear derailleur is adjusted by the speed change line to realize shifting of the bicycle.
However, the locking pawl and the positioning pawl of the conventional bicycle shifter are independently arranged, so that the coordination between the positioning pawl and the locking pawl is difficult to control when the bicycle shifter is shifted, which often easily causes the bicycle shifter to shift back, the positioning pawl cannot be buckled on the ratchet wheel in time to lock the ratchet wheel, or the locking pawl cannot be buckled on the ratchet wheel in time to lock the ratchet wheel, and further causes the bicycle shifter to shift back, which causes the front derailleur or the rear derailleur to jump, thereby affecting the normal use of the bicycle shifter, causing damage to the bicycle shifter and the transmission, affecting the service lives of the bicycle shifter and the transmission, and having potential safety hazard and poor reliability.
Disclosure of Invention
In order to solve the above problems, the present invention provides a bicycle shifter with compact structure, good operational reliability, good shifting stability and capable of preventing gear shift from being out of gear during shifting.
In order to achieve the main purpose of the invention, the invention provides a bicycle shifter, which comprises a base, a wire winding disc, a ratchet wheel component, a first fixed disc, a pawl component and a gear-reversing plectrum, wherein the wire winding disc is rotatably connected with a connecting shaft in the base, the wire winding disc is provided with a positioning key, the ratchet wheel component is provided with ratchets, the middle part of the ratchet wheel component is provided with a positioning groove, the positioning key is matched and connected with the positioning groove, the first fixed disc is fixedly connected with the base, the first fixed disc is provided with a first bulge along the axial extension of the connecting shaft, the first bulge is provided with a first pin shaft, the axis of the first pin shaft is vertical to the axis of the connecting shaft, the pawl component is rotatably connected with the first pin shaft, the pawl component is provided with a pawl part and a first linkage part connected with the pawl part, the pawl part is provided with a locking pawl and a positioning pawl, and is meshed with the locking pawl or the positioning pawl, the gear withdrawing shifting piece is rotatably connected with the connecting shaft and provided with a second linkage part, and the first linkage part is adjacent to the second linkage part.
It can be seen from the above that, when the bicycle shifter is operated to shift back, the shift back plectrum is shifted, so that the second linkage part of the shift back plectrum drives the first linkage part of the pawl member, the pawl member rotates, the locking pawl releases the locking of the ratchet member and the positioning pawl gradually approaches the ratchet member, when the locking pawl is separated from the first ratchet meshed with the locking pawl, the ratchet member returns back to reset, at the moment, the positioning pawl rotates to the ratchet member and is locked with the second ratchet on the ratchet member, and the positioning of the ratchet member is realized. When the gear-reversing plectrum is loosened, the pawl component resets, at the moment, the positioning pawl loosens the meshing of the second ratchet teeth, meanwhile, the locking pawl locks the third ratchet teeth of the ratchet component, and the gear-reversing operation of the bicycle gear shifter is completed. Therefore, through the arrangement and the structural design of the bicycle shifter, the positioning pawl and the locking pawl have good coordination, the bicycle shifter is prevented from being out of gear when in gear withdrawing operation, the gear skipping of the front derailleur or the rear derailleur is avoided, the bicycle shifter has the advantages of compact structure, good working reliability and good gear shifting stability, and the service lives of the bicycle shifter and the speed changer can be prolonged.
Preferably, the gap between the locking pawl and the positioning pawl accommodates two ratchet teeth.
It can be seen from above that, through setting up the interval between locking pawl and the location pawl, and then control ratchet member pivoted stroke, and make the clearance between locking pawl and the location pawl can hold two ratchets, can make ratchet member can only rotate a ratchet at every turn, prevent that ratchet member pivoted range is too big and cause preceding derailleur or rear derailleur's removal range too big, avoid influencing the precision of shifting.
In a further aspect, a vertical distance between an addendum of the locking pawl and a bottom surface of the first interlocking portion is greater than a vertical distance between an addendum of the positioning pawl and a bottom surface of the first interlocking portion.
It is from top to bottom visible, through setting up the shape structure and the relative position to locking pawl, location pawl, and then guarantee the harmony of motion between locking pawl and the location pawl, avoid when carrying out the gear shift, the bicycle selector appears out of gear the condition, stability when improving bicycle selector and shift.
Another preferred scheme is that the first linkage part is provided with a wedge surface, the second linkage part is provided with an arc surface, and the wedge surface is adjacent to the arc surface.
It is thus clear that first linkage portion is adjoined through the cambered surface of inclined plane with second linkage portion, plays the guide effect to the rotation of first linkage portion, and can reduce the resistance when bicycle selector shifts.
The bicycle shifter comprises a base, a first accommodating cavity, a second fixing disc, a connecting shaft, a second fixing disc and a second pin shaft, wherein the base is provided with the first accommodating cavity, the bicycle shifter further comprises the second fixing disc, the second fixing disc is installed in the first accommodating cavity, the connecting shaft is fixedly connected with the second fixing disc, the second fixing disc is provided with the second pin shaft along the axial direction, and the second pin shaft penetrates through the first fixing disc and is fixedly connected with the first fixing disc.
It is thus clear that the second fixed disk is arranged, so that components such as the wire spool, the ratchet member and the gear-returning shifting piece can be directly arranged on the second fixed disk, and the assembly of the bicycle gear shifter is more convenient through the detachable connection mode of the second fixed disk and the base.
The bicycle gear shifter further comprises a first spring, and two ends of the first spring are respectively connected with the second pin shaft and the gear withdrawing shifting piece.
It is from top to bottom visible, set up first spring for the kickback plectrum can reset under the effort of first spring.
According to a further scheme, a second protrusion is arranged on one side, facing the wire spool, of the second fixing disk in the axial direction, a third protrusion is arranged on the circumferential direction of the wire spool, a connecting hole is formed in the third protrusion, and the third protrusion of the wire spool can rotate to the second protrusion around the axis of the connecting shaft.
It is from top to bottom visible, connecting hole on the third arch is used for being connected with the variable speed line for the wire reel can tighten up or release the variable speed line, and, it is protruding to set up the second on the second fixed disk, makes the second arch can carry on spacingly to the third arch, and then restricts the initial position of wire reel, prevents that the wire reel from crossing initial position when reseing, avoids causing the damage to bicycle selector.
Still further scheme is, the wire reel has the second and holds the chamber, and bicycle shifter still includes the second spring, and the second spring is installed and is held the intracavity at the second, and the second spring both ends are connected with second fixed disk, wire reel respectively.
It is thus clear that, set up the second spring for the wire reel can reset under the effort of second spring, and drive the ratchet component through the wire reel, makes the ratchet component roll back, accomplishes and moves back the shelves operation.
Still further, the pawl member is provided with a recess, and the bicycle shifter further comprises a third spring, both ends of the third spring being connected to the base and the recess, respectively.
As can be seen from the above, a third spring is provided so that the pawl member can be reset under the urging force of the third spring.
In a further aspect, the bicycle shifter further includes a handlebar clamp fixedly mounted to the base.
From top to bottom, the handlebar anchor clamps are used for can fixed mounting the bicycle selector on bicycle handlebar.
Drawings
FIG. 1 is a block diagram of an embodiment of the bicycle shifter of the present invention.
FIG. 2 is an exploded view of an embodiment of the bicycle shifter of the present invention.
FIG. 3 is a block diagram of an embodiment of the bicycle shifter of the present invention with some components omitted.
FIG. 4 is a cross-sectional view of an embodiment of the bicycle shifter of the present invention.
FIG. 5 is a structural view of the embodiment of the bicycle shifter of the present invention with the base omitted.
FIG. 6 is a structural view of the wire spool of the embodiment of the bicycle shifter of the present invention.
FIG. 7 is a block diagram of a pawl member of an embodiment of the bicycle shifter of the present invention.
FIG. 8 is a block diagram of the reverse paddle of the embodiment of the bicycle shifter of the present invention.
FIG. 9 is a schematic view of a drive position of the embodiment of the bicycle shifter of the present invention.
FIG. 10 is a schematic view of a drive position from another perspective of the embodiment of the bicycle shifter of the present invention.
FIG. 11 is a schematic view of the relative positions of the check slide and the pin in the drive position of the embodiment of the bicycle shifter of the present invention.
FIG. 12 is a schematic view of the relative positions of the check slide and the pin in the downshift condition of the bicycle shifter embodiment of the present invention.
FIG. 13 is a schematic view of the reverse gear state of the embodiment of the bicycle shifter of the present invention.
FIG. 14 is a schematic view of the reverse gear state from another perspective of the embodiment of the bicycle shifter of the present invention.
FIG. 15 is a schematic view of a first relative position of the ratchet member and the pawl member in the downshifting state of the embodiment of the bicycle shifter of the present invention.
FIG. 16 is a second relative positional schematic of the ratchet member and the pawl member in the downshifted state of the embodiment of the bicycle shifter of the present invention.
FIG. 17 is a third schematic relative position of the ratchet member and the pawl member in the downshifted state of the embodiment of the bicycle shifter of the present invention.
FIG. 18 is a fourth schematic relative position of the ratchet member and the pawl member in the downshifted state of the embodiment of the bicycle shifter of the present invention.
FIG. 19 is a fifth relative positional schematic of the ratchet member and the pawl member in the downshifted state of the embodiment of the bicycle shifter of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
Referring to fig. 1 and 2, a bicycle shifter 10 includes a base 1, a limit slide 13, a wire spool 2, a ratchet member 3, a first fixed plate 4, a second fixed plate 40, a pawl member 5, a downshift paddle 6, an auxiliary lever 7, a first lever 8, a second lever 80, a first spring 63, a second spring 24 and a third spring 531.
The base 1 has a first accommodating chamber 11, the second fixing disk 40 is detachably mounted in the first accommodating chamber 11 by screws, the base 1 is provided with a connecting shaft 110 therein, and the connecting shaft 110 is located in the first accommodating chamber 11, and the connecting shaft 110 is fixedly connected with the second fixing disk 40. The second fixed disk 40 is provided with a second pin 401 in the axial direction of the connecting shaft 110.
Referring to fig. 3 to 5 in combination with fig. 2, the base 1 includes a support member 12, the support member 12 is rotatably connected to the body of the base 1 by a pin 121, and a return spring 14 is provided between the support member 12 and the body of the base 1. The middle of the support member 12 is provided with a sliding groove 122, and the side of the support member 12 is provided with a through hole 124, wherein a protrusion 123 is provided in the sliding groove 122, and the through hole 124 is used for connecting with a brake cable of the bicycle. The limit slide bar 13 is slidably connected to the base 1, specifically, the limit slide bar 13 is slidably installed in the sliding groove 122, a spring 133 is disposed between the limit slide bar 13 and the protrusion 123, and two ends of the spring 133 abut against the limit slide bar 13 and the protrusion 123, respectively.
The first lever 8 is rotatably connected to the support member 12 by a pin 81, and a return spring 82 is disposed between the first lever 8 and the support member 12, and the return spring 82 is used for returning the first lever 8. The second lever 80 is rotatably connected to the support member 12 by a pin 81, and a return spring 802 is disposed between the second lever 80 and the support member 12, and the return spring 802 is used for returning the second lever 80.
The limit slide bar 13 has a first limit portion 131, and one end of the limit slide bar 13 away from the first limit portion 131 is provided with a wedge surface 132, and the second lever 80 is provided with a wedge-shaped protrusion 802 near the wedge surface 132, and the wedge-shaped protrusion 802 is adjacent to the wedge surface 132.
Referring to fig. 6 and 8 in combination with fig. 2 and 5, the wire spool 2 is rotatably connected with the connecting shaft 110, and the wire spool 2 is located above the second fixed disk 40. The wire spool 2 is provided with a positioning key 21, a third protrusion 22 is arranged on the circumferential direction of the wire spool 2, a through hole 221 is arranged on the third protrusion 22, and the through hole 221 is used for being connected with a speed change line of a bicycle. In addition, the middle part of wire reel 2 has and holds chamber 23, holds chamber 23 and is used for installing second spring 24, and the both ends of second spring 24 are connected with second fixed disk 40, wire reel 2 respectively, and second spring 24 is used for carrying out the reset action to wire reel 2. In addition, the second fixed disk 40 is further provided with a second protrusion 402, the second protrusion 402 is arranged to extend toward the wire spool 2 along the axial direction of the connecting shaft 110, and the third protrusion 22 of the wire spool 2 can rotate around the axis of the connecting shaft 110 to the second protrusion 402 of the second fixed disk 40. Through set up second arch 402 on second fixed disk 40 for second arch 402 can carry on spacingly to the third arch 22 on wire reel 2, and then limits wire reel 2's initial position, prevents that wire reel 2 from crossing initial position when reseing, avoids causing the damage to the bicycle selector.
The ratchet member 3 has ratchet teeth 311 and 321, and the middle part of the ratchet member 3 is provided with a positioning slot, and the ratchet member 3 is connected with the positioning key 21 of the wire spool 2 through the positioning slot. Specifically, the ratchet member 3 includes a first ratchet 31 and a second ratchet 32, the ratchet teeth 311 are provided in the circumferential direction of the first ratchet 31, the ratchet teeth 321 are provided in the circumferential direction of the second ratchet 32, and the positioning groove 312 is provided in the middle of the first ratchet 31 and the positioning groove 322 is provided in the middle of the second ratchet 32. The first ratchet wheel 31 is connected with the positioning key 21 of the wire spool 2 through the positioning slot 312 in a matching manner, the second ratchet wheel 32 is connected with the positioning key 21 of the wire spool 2 through the positioning slot 322 in a matching manner, and the second ratchet wheel 32 is arranged between the wire spool 2 and the first ratchet wheel 31.
The pawl member 5 has a pawl portion 51 and a first interlocking portion 52 connected to the pawl portion 51, the pawl portion 51 has a locking pawl 511 and a positioning pawl 512, and the first interlocking portion 52 is provided with a wedge surface 521. Wherein the gap between the locking pawl 511 and the positioning pawl 512 can accommodate two ratchet teeth 311, and the vertical distance between the tooth top of the locking pawl 511 and the bottom surface 522 of the first interlocking part 52 is greater than the vertical distance between the tooth top of the positioning pawl 512 and the bottom surface 522 of the first interlocking part 52. Further, the click member 5 is provided with a groove 53.
It can be seen that the distance between the locking pawl and the positioning pawl is set, and further the rotating stroke of the ratchet wheel component is controlled, so that the gap between the locking pawl and the positioning pawl can accommodate two ratchets, the ratchet wheel component can only rotate one ratchet at each time, the phenomenon that the moving amplitude of the front derailleur or the rear derailleur is too large due to too large rotating amplitude of the ratchet wheel component is prevented, and the influence on the gear shifting precision is avoided. And through setting up the shape structure and the relative position to locking pawl, location pawl, and then guarantee the harmony of motion between locking pawl and the location pawl, avoid when carrying out the gear shift, the bicycle selector appears out of gear the condition, stability when improving the bicycle selector and shift gears.
The first fixing disk 4 is provided with a first through hole and a second through hole, the first fixing disk 4 is fixedly connected with the base 1 through the first through hole and the connecting shaft 110, the second pin 401 on the second fixing disk 40 penetrates through the second through hole of the first fixing disk 4 to be fixedly connected with the first fixing disk 4, the first fixing disk 4 is positioned, and the first fixing disk 4 is prevented from rotating relative to the connecting shaft 110. The first fixed disk 4 is provided with a first protrusion 41 along the axial direction of the connecting shaft 110, the first protrusion 41 is provided with a first pin shaft 42, and the axis of the first pin shaft 42 is perpendicular to the axis of the connecting shaft 110. The pawl member 5 is rotatably connected to the first axis, and both ends of a third spring 531 are connected to the base 1 and the groove 53 of the pawl member 5, respectively, the third spring 531 for returning the pawl member 5. In addition, still be provided with stopper 43 and stopper 44 on the first fixed disk 4, first arch 41, stopper 43 and stopper 44 distribute in proper order along the circumference of first fixed disk 4, and wherein, arch 43 is used for spacing supplementary driving lever 7, prevents that supplementary driving lever 7 from crossing initial position when reseing, and arch 44 is used for spacing shifting plectrum 6 that moves back, prevents that shifting plectrum 6 from crossing initial position when reseing.
The gear-returning shifting piece 6 is rotatably connected with the connecting shaft 110, the gear-returning shifting piece 6 is positioned above the first fixing disc 4, the gear-returning shifting piece 6 is provided with a second linkage part 61 and a second limiting part 62, the second linkage part 61 is provided with a cambered surface 611, and the second linkage part 61 is abutted with a wedge surface 511 of the first linkage part 51 of the pawl member 5 through the cambered surface 611. The first interlocking part 51 is adjacent to the arc surface 611 of the second interlocking part 61 through the wedge surface 511, thereby guiding the rotation of the first interlocking part 51 and reducing the resistance of the bicycle shifter during shifting. In addition, the end of the first spring 63 is connected with the second pin 401 and the gear-shifting piece 6 respectively, and the first spring 63 is used for resetting the gear-shifting piece 6.
A first end of the auxiliary lever 7 is rotatably connected to the connecting shaft 110, and a second end of the auxiliary lever 7 abuts the first shift lever 8. The auxiliary shift lever 7 is provided with a pin 71 and a shift pawl 72, the pin 71 is slidably connected to the auxiliary shift lever 7 along the axial direction of the connecting shaft 110, and the pin 71 is connected with the first limiting portion 131 of the limiting slide rod 13 in a matching manner. Further, a snap spring 711 is provided on the pin 71, and the pin 71 is engaged with the auxiliary lever 7 by the snap spring 711, thereby preventing the pin 71 from being disengaged from the auxiliary lever 7 during sliding. A spring 712 is arranged between the circlip 711 and the auxiliary lever 7, and the spring 712 is used for resetting the pin 71. A spring 73 is provided between the auxiliary lever 7 and the base 1, and the spring 73 is used to return the auxiliary lever 7.
The shift pawl 72 is rotatably connected to the auxiliary lever 7 by a pin 721, and a spring 722 is provided between the shift pawl 72 and the auxiliary lever 7, and the spring 722 is used to reset the shift pawl 72. The gear-shifting pawl 72 abuts against the second limit portion 62 of the gear-shifting piece 6, and the gear-shifting pawl 72 can rotate around the axis of the pin 721 and is buckled on the ratchet 321 of the second ratchet wheel 32.
Furthermore, a handlebar clamp 15 is provided on the base 1, the handlebar clamp 15 being used to enable the bicycle shifter 10 to be fixedly mounted on a bicycle handlebar.
Referring to fig. 9 and 10 in conjunction with fig. 2, when a shift operation of the bicycle is required, the first shift lever 8 and the second shift lever 80 are simultaneously shifted, so that the first shift lever 8 and the second shift lever 80 rotate around the pin 81, respectively. When the first gear lever 8 rotates around the pin 81, the return spring 82 is compressed to store energy; when the second lever 80 rotates around the pin 81, the return spring 802 is compressed to store energy, and meanwhile, the wedge-shaped protrusion 801 on the second lever 80 pushes the limit slide bar 13 to slide in the sliding groove 122 of the support member 12 along the direction X, and compresses and stores energy to the spring 133, at this time, the first limit portion 131 of the limit slide bar 13 is separated from the matching connection with the pin 71 on the auxiliary shift lever 7, so that the pin 71 is prevented from moving along the direction Y, and the auxiliary shift lever 7 is prevented from driving the shift-withdrawing lever 6 to rotate when rotating (see fig. 11).
Meanwhile, the first shift lever 8 pushes the first end of the auxiliary shift lever 7, so that the auxiliary shift lever 7 rotates around the connecting shaft 110 and compresses the return spring 73 to store energy. At this time, the spring 722 of the auxiliary lever 7 releases energy to rotate the forward pawl 72 around the pin 721 and engage with the second ratchet 32 of the ratchet member 3. When the first shift lever 8 continues to rotate around the pin 81, the first shift lever 8 continues to push the auxiliary lever 7 to rotate around the connecting shaft 110, so that the shift pawl 72 pushes the second ratchet 32 to rotate. Since the ratchet member 3 is cooperatively connected with the positioning key 21 of the wire spool 2 through the positioning slot, when the second ratchet wheel 32 rotates, the wire spool 2 synchronously rotates with the second ratchet wheel 32 and the first ratchet wheel 31 under the action of the positioning key 21, so that the third protrusion 22 of the wire spool 2 rotates around the axis of the connecting shaft 110, and further the speed change line of the bicycle is wound, thereby realizing the shift operation of the bicycle shifter 10.
Wherein, when the forward pawl 72 pushes the second ratchet wheel 32 to rotate, the first ratchet wheel 31 rotates synchronously and one ratchet tooth 311 of the first ratchet wheel 31 passes over the locking pawl 511 of the pawl member 5. Specifically, when the first ratchet wheel 31 rotates, the first ratchet tooth 311 of the first ratchet wheel 31 gradually approaches the locking pawl 511 and pushes up the locking pawl 511, causing the pawl member 5 to rotate about the first pin shaft 42 and compressing and accumulating the energy of the third spring 531. Meanwhile, the positioning pawl 512 of the pawl member 5 is gradually close to the first ratchet wheel 31 and positioned between the second ratchet tooth 311 and the third ratchet tooth 311 of the first ratchet wheel 31 by the rotation of the pawl member 5, so that the first ratchet wheel 31 is positioned and the bicycle shifter 10 is prevented from being out of gear during the gear shifting. When the first ratchet 311 of the first ratchet 31 goes over the locking pawl 511, the third spring 531 releases the elastic potential energy and resets the pawl member 5. At this time, the locking pawl 511 is engaged with the first ratchet teeth 311 of the first ratchet wheel 31 to lock the first ratchet wheel 31, thereby preventing the first ratchet wheel 31 from being retracted, and the positioning pawl 512 is disengaged from the first ratchet wheel 31 to cancel the positioning of the first ratchet wheel 31. At this time, the second spring 24 located between the wire spool 2 and the second fixed disk 40 is compressed to store energy.
When the first shift lever 8 and the second shift lever 80 are released, the return spring 82 releases the elastic potential energy to return the first shift lever 8; meanwhile, the return spring 802 releases elastic potential energy to return the second lever 80. When the first shift lever 8 is reset, the spring 73 releases the elastic potential energy to reset the auxiliary shift lever 7 until the auxiliary shift lever 7 abuts on the protrusion 43, and the first position-limiting portion 62 of the shift-withdrawing member 6 pushes the shift-advancing pawl 72 on the auxiliary shift lever 7, so that the shift-advancing pawl 72 rotates around the pin 721 to reset, and the spring 722 is compressed to store energy. When the second lever 80 is reset, the wedge-shaped protrusion 801 on the second lever 80 gradually releases the pushing of the wedge surface 132 of the limit slide 13, and at the same time, the spring 133 releases energy to reset the limit slide 13. When the first and second shift levers 8 and 80 are completely reset, the forward shift operation of the bicycle shifter 10 is completed.
Referring to fig. 11 and 12 in conjunction with fig. 2, when the bicycle needs to be shifted backward, the first shift lever 8 is shifted, the first shift lever 8 rotates around the pin 81, and the return spring 82 is compressed to store energy. Meanwhile, the first shift lever 8 pushes the first end of the auxiliary shift lever 7, so that the auxiliary shift lever 7 rotates around the connecting shaft 110 and compresses the return spring 73 to store energy. When the auxiliary shift lever 7 rotates, the pin 71 on the auxiliary shift lever 7 is in fit connection with the first limiting portion 131 of the limiting slide rod 13, so that the first limiting portion 131 limits the pin 71, the pin 71 gradually moves along the direction Y along with the rotation of the auxiliary shift lever 7, and the spring 712 is compressed and stored with the clamp spring 711 clamped on the pin 71. At the same time, the pin 71 moves in the direction Y under the limit action of the first limit portion 131 and engages with the first limit portion 62 of the kick-out paddle 6 (see fig. 12).
When the auxiliary shift lever 7 continues to rotate, the auxiliary shift lever 7 drives the shift withdrawing dial 6 to rotate around the connecting shaft 110 through the pin 71 on the auxiliary shift lever 7, so that the second linkage 61 of the shift withdrawing dial 6 pushes the first linkage 52 of the pawl member 5, so that the pawl member 5 rotates around the pin shaft 42, and further the locking pawl 511 of the pawl member 5 contacts and locks the first ratchet wheel 31 of the ratchet member 3, so that the first ratchet wheel 31 and the wire winding disc 2 reset under the reaction force of the second spring 24, the winding of the bicycle speed change line is released, and the shift withdrawing operation of the bicycle gear shifter is realized.
Specifically, when the pin 71 of the auxiliary lever 7 drives the shift-withdrawing lever 6 to rotate, the second limiting portion 62 of the shift-withdrawing lever 6 limits the shift-entering pawl 72 on the auxiliary lever 7, so as to prevent the shift-entering pawl 72 from rotating around the pin 721, and further prevent the shift-entering pawl from being buckled on the second ratchet wheel 32 to perform the shift-entering operation on the bicycle shifter 10. Further, when the shift-backing paddle 6 rotates, the shift-backing paddle 6 and the second pin 401 store energy in a tensile manner to the first spring 63, and the arc surface 611 of the second coupling portion 61 of the shift-backing paddle 6 pushes the first coupling portion 52 of the pawl member 5, so that the pawl member 5 rotates around the first pin 42. As shown in fig. 15 and 16, when the pawl member 5 rotates, the pawl member 5 stores energy in compression to the third spring 531, and the locking pawl 511 of the pawl member 5 gradually disengages from the first ratchet teeth 311 of the first ratchet 31 as the pawl member 5 rotates, while the positioning ratchet 512 of the ratchet member 5 gradually approaches between the second ratchet teeth 311 and the third ratchet teeth 311 of the first ratchet 31 as the pawl member 5 rotates.
As shown in fig. 17, when the locking ratchet 511 is completely disengaged from the first ratchet 311 of the first ratchet 31, the positioning ratchet 512 is located between the second ratchet 311 and the third ratchet 311 of the first ratchet 31, at this time, the second spring 24 releases energy and resets the wire spool 2, the wire spool 2 drives the first ratchet 31 and the second ratchet 32 to synchronously rotate until the second ratchet 311 of the first ratchet 31 is engaged with the positioning ratchet 512, the first ratchet 31, the second ratchet 32 and the wire spool 2 stop rotating to realize the gear shifting operation of the bicycle shifter 10, and the positioning pawl 512 positions the first ratchet 31 to prevent the bicycle shifter 10 from gear shifting during gear shifting.
When the first shift lever 8 is released, the return spring 82 releases the elastic potential energy to return the first shift lever 8. When the first shift lever 8 is reset, the spring 73 releases the elastic potential energy to reset the auxiliary shift lever 7. When the auxiliary lever 7 is reset, the first spring 63 releases the elastic potential energy to reset the shift lever 6, and at this time, the second linkage 61 releases the pushing of the first linkage 52 of the pawl member 5, so that the pawl member 5 is reset by the elastic potential energy of the third spring 531.
As shown in fig. 18 and 19, at the time of resetting of the pawl member 5, the locking pawl 511 gradually approaches the first ratchet wheel 31 as the pawl member 5 rotates, and at the same time, the positioning pawl 512 gradually moves away from the first ratchet wheel 31. When the locking pawl 511 is located in the gap between the first ratchet tooth 311 and the fourth ratchet tooth 311, the positioning pawl 512 is disengaged from the second ratchet tooth 311, and at this time, the wire spool 2 and the ratchet member 3 continue to be reset until the fourth ratchet tooth 311 is engaged with the locking pawl 511. At this time, the locking pawl 511 locks the first ratchet wheel 31, preventing the first ratchet wheel 31 from retracting. Wherein the first ratchet 311 is located between the second ratchet 311 and the fourth ratchet 311, and the second ratchet 311 is located between the first ratchet 311 and the third ratchet 311.
When the auxiliary lever 7 returns to the initial position and abuts the protrusion 43 of the first fixed disk 4, the second stopper 62 of the shift lever 6 also abuts the protrusion 44 of the first fixed disk 4, thereby preventing the auxiliary lever 7 and the shift lever 6 from crossing the initial position when they are reset. At the same time, the pin 71 is reset and returned to the initial position by the elastic potential energy of the spring 711, and the snap spring 711 is used for preventing the pin 71 from exceeding the initial position. When the first shift lever 8, the auxiliary lever 7, etc. are reset, the downshift operation of the bicycle shifter 10 is completed.
When the bicycle needs to be braked, the second gear lever 80 is pulled, so that the supporting member 12 rotates around the pin shaft 121, the return spring 14 is compressed to store energy, the through hole in the supporting member 12 pulls the brake cable of the bicycle, the brake cable is wound, the brake cable drives the brake mechanism of the bicycle, and the bicycle is braked. When the second lever 80 is released, the support member 12 is returned by the elastic potential energy of the return spring 14, the winding of the brake cable is released, and the brake mechanism is returned.
Therefore, through the arrangement and the structural design of the bicycle shifter, the positioning pawl and the locking pawl have good coordination, the phenomenon of gear disengagement when the bicycle shifter is operated in a gear reversing mode is prevented, and gear skipping of the front derailleur or the rear derailleur is avoided. Compared with the prior art, when the bicycle gear shifter is operated to shift back, the ratchet component is reset after being pre-positioned, and is locked after being reset, and the pre-positioning of the ratchet component is released, so that the bicycle gear shifter can be effectively prevented from being shifted out of gear in the process of shifting back. The bicycle shifter has the advantages of compact structure, good working reliability and good shifting stability, and can prolong the service life of the bicycle shifter and the transmission.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.
Claims (8)
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| CN201710250053.2A CN106904246B (en) | 2017-04-17 | 2017-04-17 | Bicycle gear shifter |
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| CN201710250053.2A CN106904246B (en) | 2017-04-17 | 2017-04-17 | Bicycle gear shifter |
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| CN106904246A CN106904246A (en) | 2017-06-30 |
| CN106904246B true CN106904246B (en) | 2022-05-03 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108928431B (en) * | 2018-10-12 | 2023-11-24 | 珠海蓝图运动科技股份有限公司 | Bicycle gear shifter |
| 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 |
| CN114838076B (en) * | 2022-05-13 | 2024-06-18 | 珠海蓝图运动科技股份有限公司 | Unidirectional damping structure, rear derailleur and variable speed bicycle |
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Address after: 519000 building B-2, No. 8, Honghui fifth road, Shuanglin District, LIANGANG Industrial Zone, Jinwan District, Zhuhai City, Guangdong Province Patentee after: Zhuhai Blueprint Sports Technology Co.,Ltd. Address before: 519090 room 312-43, third floor, aviation new town planning exhibition hall, Jinwan District, Zhuhai City, Guangdong Province Patentee before: ZHUHAI LTWOO CONTROLLER TECHNOLOGY CO.,LTD. |
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