CN109484562B

CN109484562B - Chainless bicycle

Info

Publication number: CN109484562B
Application number: CN201811490943.1A
Authority: CN
Inventors: 唐靖林
Original assignee: Tianjin Jinmeilun Technology Co ltd
Current assignee: Tianjin Jinmeilun Technology Co ltd
Priority date: 2018-12-07
Filing date: 2018-12-07
Publication date: 2020-08-28
Anticipated expiration: 2038-12-07
Also published as: CN109484562A

Abstract

The invention discloses a chainless bicycle, and belongs to the field of bicycles. A chainless bicycle comprises a magnesium alloy frame and a rear wheel, and further comprises a shaftless crank device, a driving chuck and a shaft transmission device, wherein the rear wheel is movably arranged at the right lower part of the magnesium alloy frame; the shaftless crank device drives the driving chuck to rotate through the shaft transmission device, so as to drive the rear wheel to rotate, and the positions of the driving groove and the driving ferrule can be adjusted by adjusting the positions of the driving sleeve and the loop bar because the driving groove arranged on the driving chuck is a multi-stage ring groove, thereby achieving the effect of speed change.

Description

Chainless bicycle

Technical Field

The invention relates to the field of bicycles, in particular to a chainless bicycle.

Background

Bicycles, also known as bicycles or bicycles, are typically two-wheeled small land vehicles. After a person rides the vehicle, the person steps on the pedal as power, so that the vehicle is an environment-friendly vehicle; can be used as an environment-friendly vehicle for riding instead of walking and going out; more and more people use bicycles as fitness equipment for riding exercise and bicycle touring. The traditional bicycle transmission system adopts chain transmission, the chain transmission technology is mature, but the use of the chain transmission system has some inconveniences, such as easy chain dropping, and the shaft transmission bicycle has the characteristics of long service life, high transmission efficiency and the like compared with the chain transmission bicycle.

Few existing bicycle industries have shaft-driven variable speed bicycles with low transmission friction.

Disclosure of Invention

The invention aims to solve the problem that the existing bicycle industry rarely has a shaft transmission speed-changing bicycle with small transmission friction, and provides a chainless bicycle.

In order to achieve the purpose, the invention adopts the following technical scheme:

a chainless bicycle comprises a magnesium alloy frame and a rear wheel, and further comprises a shaftless crank device, a driving chuck and a shaft transmission device, wherein the rear wheel is movably arranged at the right lower part of the magnesium alloy frame, the driving chuck is fixedly connected with the central part of the rear wheel, the shaftless crank device is fixedly arranged at the middle lower part of the magnesium alloy frame, and two ends of the shaft transmission device are respectively movably connected with the shaftless crank device and the driving chuck.

Preferably, the shaft transmission device comprises a driving sleeve, a sleeve rod, a driving sleeve and a driving shaft, the driving sleeve is fixedly connected with the outer surface of the shaftless crank device, the two ends of the sleeve rod are respectively fixedly connected with the driving sleeve and the driving sleeve, the driving shaft is fixedly installed in the sleeve rod, one end of the driving shaft is fixedly connected with the magnesium alloy frame, a first bearing is fixedly installed on the driving shaft, the driving shaft is fixedly connected with the inner ring of the driving sleeve, a clamping groove is formed in the right lower end of the magnesium alloy frame, a threaded sleeve shaft is movably installed in the middle of the rear wheel, the threaded sleeve shaft is matched with the clamping groove, a flywheel is fixedly connected in the driving chuck, and the shaft transmission device can transmit pedal energy to the rear wheel.

Preferably, the shaftless crank device comprises a crank collar, a shaftless chain wheel and a pedal component, the shaftless chain wheel is movably arranged inside the crank collar, the outer surface of the crank sleeve ring is provided with a circular rail, the outer ring of the shaftless toothed disc is fixedly connected with a connecting bearing, connecting parts are fixedly arranged on two sides of the shaftless chain wheel, one end of the pedal part passes through the circular rail and is fixedly connected with the connecting parts, a connecting groove is arranged between the connecting bearing and the shaftless chain wheel, a driving gear is fixedly arranged on the outer surface of the shaftless chain wheel, a driven gear set is fixedly arranged in the driving sleeve, a driving gear is fixedly arranged at the left end of the driving shaft, the two sides of the driven gear set are respectively meshed with the driving gear and the driving gear, and the shaftless crank device can convert kinetic energy of pedals of a rider into mechanical energy.

Preferably, drive chuck fixed mounting have the bail, drive chuck's outer lane evenly be provided with crisscross distribution between drive groove and the bail, drive lasso and drive groove phase-match, the inner circle of drive external member be provided with the spout, the outer lane fixed mounting of drive shaft have the connecting block, connecting block and spout phase-match, the outer lane fixed mounting of drive external member have the drive lasso, the drive lasso include inner circle and outer lane, inner circle and drive external member fixed connection, inner circle and outer lane between movable mounting have the ball, connect through the meshing between drive chuck and the drive lasso and make the rear wheel rotate.

Preferably, the surface of loop bar be provided with and shift the groove, the left side middle part fixed mounting of drive external member have the second bearing, the left end fixed mounting of drive external member have the fixture block of shifting, the fixture block of shifting match with the groove of shifting, the internal surface fixed mounting of loop bar have gear shifting gear train and bunching device, the both sides of the fixture block of shifting be provided with the gear groove, gear shifting gear train both sides respectively with bunching device and gear groove phase-match, bunching device on swing joint have the connecting wire of shifting, the magnesium alloy frame on fixed mounting have a fender position regulator, the other end and the fender position regulator swing joint of the connecting wire of shifting, the setting in fixture block of shifting and the groove of shifting can make axle driven bicycle play the effect of shifting.

Compared with the prior art, the invention provides a chainless bicycle, which has the following beneficial effects:

(1) the chainless bicycle is characterized in that the magnesium alloy frame has lighter weight and stronger bearing capacity compared with the traditional aluminum alloy frame by arranging the magnesium alloy frame shaftless crank device, the whole bicycle is assembled by adopting a disassembly structure, so that a rider can conveniently disassemble and assemble the chainless bicycle, the magnesium alloy frame is preferably provided with the clamping groove, the central part of a rear wheel is movably provided with the threaded sleeve shaft, when the rear wheel needs to be disassembled and replaced, the threaded sleeve shaft only needs to be rotated to separate the shaft transmission device from the driving chuck on the rear wheel, when the chainless bicycle is ridden by the rider, the chainless crank device is pedaled by a pedal to drive the driving shaft to rotate, the driving shaft and the driving sleeve rotate, the driving sleeve ring on the driving sleeve drives the driving chuck to rotate so as to drive the rear wheel to rotate, and the middle part of the rear wheel is fixedly provided with the flywheel, the output of the kinetic energy of the shaft transmission device is more efficient, the driving shaft is used as a main kinetic energy transmission structure, the allowable stress of the material of the driving shaft is higher, and in order to avoid the driving shaft from being damaged in riding, a loop bar and a driving sleeve piece are fixedly arranged on the outer surface of the driving shaft, so that the external protection effect is achieved;

(2) the chainless bicycle is characterized in that a shaftless crank device and a driving chuck are arranged, the shaftless crank device is compared with the traditional crank device, the most obvious is that the middle part of the shaftless crank device is of a hollow structure and has more industrial design aesthetic feeling, the most main components of the shaftless crank device are a crank sleeve ring and a shaftless chain wheel, the shaftless chain wheel is an integrated casting component, an outer ring is fixedly installed with a connecting bearing, the connecting bearing can reduce the resistance of a rider when pedaling a pedal device on one hand, on the other hand, the shaftless chain wheel can be fixed, the phenomenon that the shaftless chain wheel shakes when being subjected to external force to influence riding experience and power output efficiency is avoided, the driven gear set is driven to rotate when the shaftless chain wheel rotates, the driven gear set is connected through the meshing of driving gears to drive the driving shaft to rotate, the driving shaft is of a main power transmission structure, and two connecting points are mainly arranged between a driving, one is that the sliding groove arranged on the inner surface of the driving sleeve is meshed and connected with the connecting block arranged on the outer surface of the driving shaft, and the other connecting point is that the driving sleeve is meshed and connected with the driving shaft, so that the driving sleeve can move on the driving shaft at a certain distance, and the driving shaft can also drive the driving sleeve to rotate;

(3) the chainless bicycle is characterized in that a second bearing is fixedly arranged on the right side of a driving sleeve piece, the left part of the second bearing is not driven by a driving shaft, a gear shifting groove is formed in the outer surface of a sleeve rod, a gear shifting fixture block is fixedly arranged on the left end of the driving sleeve piece, the relative position between the sleeve rod and the driving sleeve piece can be adjusted only by adjusting the relative position between the gear shifting fixture block and the gear shifting groove, the driving groove formed in a driving chuck is a multi-stage groove, a driving ferrule is meshed with the driving groove close to the center and connected, the rotating frequency of a rear wheel is increased, but the moment is larger, the riding speed is high but the riding effort is high, when the driving ferrule is meshed with the driving groove close to the outer ring and connected, the rotating frequency of the rear wheel is reduced, but the moment is smaller, the riding speed is slow but more labor-saving, and the chainless, so there are gear shifting gear train and bunching device at the internal surface fixed mounting of loop bar, when riding passerby and rotating the time of keeping off the position regulator, the pulling connecting wire of shifting, keep off the position connecting wire and drive the bunching device and rotate, thereby the bunching device drives gear shifting gear train and rotates and make the fixture block of shifting and remove, reach the purpose of removing the drive lasso, and the built-in reset spring of bunching device, bunching device and the fender position connecting wire that keeps off between the position regulator are in tight state always, when carrying out the operation of keeping off, bunching device can the antiport under reset spring's effect, make drive lasso antiport, reach the effect of keeping off.

Drawings

FIG. 1 is a schematic structural view of a chainless bicycle according to the present invention;

FIG. 2 is a schematic view of the rear wheel of the chainless bicycle of the present invention;

FIG. 3 is a schematic structural view of a chainless bicycle chainless crank assembly in accordance with the present invention;

FIG. 4 is an external view of a chainless bicycle chainless crankset in accordance with the present invention;

FIG. 5 is a schematic view of the connection of a chainless bicycle chainless crankset in accordance with the present invention;

FIG. 6 is a schematic structural view of a chainless bicycle drive chuck in accordance with the present invention;

FIG. 7 is a cross-sectional view of a chainless bicycle drive kit in accordance with the present invention;

FIG. 8 is a schematic structural view of a chainless bicycle drive ring in accordance with the present invention;

FIG. 9 is a top plan view of a chainless bicycle drive kit in accordance with the present invention;

FIG. 10 is a schematic view of the connection of the inner surfaces of the shift grooves of a chainless bicycle in accordance with the present invention.

In the figure: 1. a magnesium alloy vehicle frame; 2. a rear wheel; 3. a shaftless crank arrangement; 4. driving the chuck; 5. a shaft transmission device; 6. a crank ring; 7. a circular rail; 8. a shaftless chain wheel; 9. a foot peg component; 10. a driving sleeve member; 11. a loop bar; 12. a drive kit; 13. a card slot; 14. a threaded sleeve shaft; 15. a flywheel; 16. connecting a bearing; 17. connecting grooves; 18. a drive gear; 19. a connecting member; 20. a driven gear set; 21. driving the gear; 22. a drive shaft; 23. a staple bolt; 24. a drive slot; 25. connecting blocks; 26. a drive collar; 27. a chute; 28. an inner ring; 29. an outer ring; 30. a ball bearing; 31. a first bearing; 32. a gear shifting groove; 33. a second bearing; 34. a gear shifting fixture block; 35. a shift gear set; 36. a wire harness device; 37. a shift connecting line.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being 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.

The specific implementation case is as follows:

example 1: referring to fig. 1-2, a chainless bicycle comprises a magnesium alloy frame 1 and a rear wheel 2, and further comprises a shaftless crank device 3, a driving chuck 4 and a shaft transmission device 5, wherein the rear wheel 2 is movably arranged at the right lower part of the magnesium alloy frame 1, the driving chuck 4 is fixedly connected with the central part of the rear wheel 2, the shaftless crank device 3 is fixedly arranged at the middle lower part of the magnesium alloy frame 1, and two ends of the shaft transmission device 5 are respectively movably connected with the shaftless crank device 3 and the driving chuck 4.

The shaft transmission device 5 comprises a driving sleeve 10, a sleeve rod 11, a driving sleeve 12 and a driving shaft 22, the driving sleeve 10 is fixedly connected with the outer surface of the shaftless crank device 3, two ends of the sleeve rod 11 are respectively fixedly connected with the driving sleeve 10 and the driving sleeve 12, the driving shaft 22 is fixedly installed in the sleeve rod 11, one end of the driving shaft 22 is fixedly connected with the magnesium alloy frame 1, a first bearing 31 is fixedly installed on the driving shaft 22, the driving shaft 22 is fixedly connected with the inner ring of the driving sleeve 12, a clamping groove 13 is formed in the right lower end of the magnesium alloy frame 1, a threaded sleeve shaft 14 is movably installed in the middle of the rear wheel 2, the threaded sleeve shaft 14 is matched with the clamping groove 13, and a flywheel 15 is fixedly connected in the.

The chainless bicycle is characterized in that a magnesium alloy frame 1 is provided with a shaftless crank device 3, the magnesium alloy frame 1 has the characteristics of lighter weight, stronger bearing and the like compared with the traditional aluminum alloy frame, the whole bicycle is assembled by adopting a disassembly structure, so that a rider can conveniently disassemble and assemble the chainless bicycle, a clamping groove 13 is preferably arranged on the magnesium alloy frame 1, a threaded sleeve shaft 14 is movably arranged at the central part of a rear wheel 2, when the rear wheel 2 needs to be disassembled and replaced, the shaft transmission device 5 and a driving chuck 4 on the rear wheel 2 can be separated by only rotating the threaded sleeve shaft 14, when the chainless bicycle is ridden by the rider, the shaftless crank device 3 is pedaled by the pedal, the driving shaft 22 is driven to rotate by the shaftless crank device 3, the driving shaft 22 and the driving sleeve 12 rotate so as to drive the driving sleeve 12 to rotate, a driving sleeve 26 on the driving sleeve 12 drives the driving chuck 4 to rotate so as to drive, because rear wheel 2 middle part fixed mounting has flywheel 15, makes the output of axle transmission 5 kinetic energy more high-efficient, and drive shaft 22 is higher as main kinetic energy transmission structure, the permissible stress of its self material, and in order to avoid driving shaft 22 to receive the damage in riding, so at drive shaft 22 surface fixed mounting loop bar 11 and drive external member 10, accomplish the effect of external protection.

Example 2: referring to fig. 3-8, the basic difference in connection with embodiment 1 is that the shaftless crank arrangement 3 comprises a crank ring 6, shaftless chain wheel 8 and pedal part 9, shaftless chain wheel 8 movable mounting is in the inside of crank sleeve ring 6, the surface of crank sleeve ring 6 is provided with circular track 7, shaftless chain wheel 8 outer lane fixedly connected with connecting bearing 16, shaftless chain wheel 8's both sides fixed mounting has adapting unit 19, circular track 7 and adapting unit 19 fixed connection are passed to pedal part 9's one end, be provided with spread groove 17 between connecting bearing 16 and the shaftless chain wheel 8, shaftless chain wheel 8's surface fixed mounting has drive gear 18, the inside fixed mounting who drives external member 10 has driven gear set 20, the left end fixed mounting of drive shaft 22 has drive gear 21, driven gear set 20's both sides respectively with drive gear 18 with drive gear 21 meshes the connection.

Drive chuck 4 fixed mounting has staple bolt 23, drive chuck 4's outer lane evenly is provided with drive groove 24 and drive crisscross distribution between groove 24 and the staple bolt 23, drive lasso 26 and drive groove 24 phase-match, the inner circle of drive external member 12 is provided with spout 27, the outer lane fixed mounting of drive shaft 22 has connecting block 25, connecting block 25 and spout 27 phase-match, the outer lane fixed mounting of drive external member 12 has drive lasso 26, drive lasso 26 includes inner circle 28 and outer lane 29, inner circle 28 and drive external member 12 fixed connection, movable mounting has ball 30 between inner circle 28 and the outer lane 29.

The chainless bicycle is characterized in that a shaftless crank device 3 and a driving chuck 4 are arranged, the shaftless crank device 3 is compared with a traditional crank device, the most obvious is that the middle part of the shaftless crank device 3 is of a hollow structure and has more industrial design aesthetic feeling, the most main components of the shaftless crank device 3 are a crank sleeve ring 6 and a shaftless chain wheel 8, the shaftless chain wheel 8 is an integrated casting component, a connecting bearing 16 is fixedly arranged on an outer ring, the connecting bearing 16 can reduce the resistance when a rider pedals a pedal device, on the other hand, the shaftless chain wheel 8 can be fixed, the phenomenon that the shaftless chain wheel 8 shakes under the action of external force to influence riding experience and power output efficiency is avoided, the driven gear set 20 is driven to rotate when the shaftless chain wheel 8 rotates, the driven gear set 20 drives a driving shaft 22 to rotate through the meshing connection of the driving gear 21, and the driving shaft 22 is used as a main power transmission structure, since there are two connection points between the driving sleeve 12 and the driving shaft 22, one is that the sliding slot 27 arranged on the inner surface of the driving sleeve 12 is engaged with the connecting block 25 arranged on the outer surface of the driving shaft 22, and the other is that the driving sleeve 12 is engaged with the driving shaft 22, the driving sleeve 12 can move on the driving shaft 22 at a certain distance, and the driving shaft 22 can also drive the driving sleeve 12 to rotate, when the driving sleeve 12 rotates, the external driving ferrule 26 is engaged with the driving slot 24 on the driving chuck 4, the rear wheel 2 is driven by the above connection, and the driving ferrule 26 is composed of the inner ring 28, the outer ring 29 and the balls 30, thereby greatly reducing the friction between the driving sleeve 12 and the driving chuck 4, and improving the efficiency of kinetic energy transmission.

Example 3: referring to fig. 9 to 10, the basic difference of embodiment 1 is that the outer surface of the sleeve rod 11 is provided with a shift groove 32, the middle part of the left side of the driving sleeve 12 is fixedly provided with a second bearing 33, the left end of the driving sleeve 12 is fixedly provided with a shift block 34, the shift block 34 is matched with the shift groove 32, the inner surface of the sleeve rod 11 is fixedly provided with a shift gear set 35 and a wire bunching device 36, two sides of the shift block 34 are provided with gear grooves, two sides of the shift gear set 35 are respectively matched with the wire bunching device 36 and the gear grooves, the wire bunching device 36 is movably connected with a shift connecting line 37, the magnesium alloy frame 1 is fixedly provided with a gear adjuster, and the other end of the shift connecting.

The chainless bicycle is characterized in that a second bearing 33 is fixedly mounted on the left side of a driving sleeve 12, the left part of the second bearing 33 is not driven by a driving shaft 22, a gear shifting groove 32 is formed in the outer surface of a sleeve rod 11, a gear shifting fixture block 34 is fixedly mounted on the left end of the driving sleeve 12, the relative position between the sleeve rod 11 and the driving sleeve 12 can be adjusted only by adjusting the relative position between the gear shifting fixture block 34 and the gear shifting groove 32, a driving groove 24 formed in a driving chuck 4 is a multi-stage groove, a driving ferrule 26 is meshed and connected with the driving groove 24 close to the center, the rotating frequency of a rear wheel 2 is increased but the torque is larger, the riding speed is high but the riding speed is more strenuous, when the driving ferrule 26 is meshed and connected with the driving groove 24 close to an outer ring 29, the rotating frequency of the rear wheel 2 is reduced but the torque is smaller, the riding speed is low but the labor is more labor-saving, the chainless chain The effect of (1), so at internal surface fixed mounting of loop bar 11 have gear shifting gear train 35 and bunching device 36, when riding passerby and rotating gear position regulator, pulling shift connecting wire 37, gear position connecting wire drives bunching device 36 and rotates, bunching device 36 drives gear shifting gear train 35 and rotates thereby make the fixture block 34 that shifts move, reach the purpose of removing drive lasso 26, and bunching device 36 embeds reset spring, bunching device 36 and gear position regulator between shift connecting wire 37 is in tight state always, when carrying out the operation of keeping out the gear, bunching device 36 can the counter rotation under reset spring's effect, make drive lasso 26 counter movement, reach the effect of keeping out the gear.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A chainless bicycle comprises a magnesium alloy frame (1) and a rear wheel (2), and is characterized in that: the magnesium alloy bicycle is characterized by further comprising a shaftless crank device (3), a driving chuck (4) and a shaft transmission device (5), wherein the rear wheel (2) is movably arranged at the right lower part of the magnesium alloy bicycle frame (1), the driving chuck (4) is fixedly connected with the central part of the rear wheel (2), the shaftless crank device (3) is fixedly arranged at the middle lower part of the magnesium alloy bicycle frame (1), and two ends of the shaft transmission device (5) are respectively movably connected with the shaftless crank device (3) and the driving chuck (4);

the shaft transmission device (5) comprises a driving sleeve piece (10), a sleeve rod (11), a driving sleeve piece (12) and a driving shaft (22), the driving sleeve piece (10) is fixedly connected with the outer surface of the shaftless crank device (3), two ends of the sleeve rod (11) are respectively fixedly connected with the driving sleeve piece (10) and the driving sleeve piece (12), the driving shaft (22) is fixedly arranged in the sleeve rod (11), one end of the driving shaft (22) is fixedly connected with the magnesium alloy frame (1), a first bearing (31) is fixedly arranged on the driving shaft (22), the driving shaft (22) is fixedly connected with the inner ring of the driving sleeve piece (12), a clamping groove (13) is formed in the right lower end of the magnesium alloy frame (1), a threaded sleeve shaft (14) is movably arranged in the middle of the rear wheel (2), and the threaded sleeve shaft (14) is matched with the clamping groove (13), a flywheel (15) is fixedly connected inside the driving chuck (4);

the shaftless crank device (3) comprises a crank sleeve ring (6), a shaftless chain wheel (8) and pedal components (9), wherein the shaftless chain wheel (8) is movably arranged in the crank sleeve ring (6), a circular rail (7) is arranged on the outer surface of the crank sleeve ring (6), a connecting bearing (16) is fixedly connected with the outer ring of the shaftless chain wheel (8), connecting components (19) are fixedly arranged on two sides of the shaftless chain wheel (8), one end of each pedal component (9) penetrates through the circular rail (7) and is fixedly connected with the connecting components (19), a connecting groove (17) is arranged between the connecting bearing (16) and the shaftless chain wheel (8), a driving gear (18) is fixedly arranged on the outer surface of the shaftless chain wheel (8), a driven gear set (20) is fixedly arranged in the driving sleeve component (10), a driving gear (21) is fixedly arranged at the left end of the driving shaft (22), two sides of the driven gear set (20) are respectively connected with the driving gear (18) and the driving gear (21) in a meshed manner;

the outer surface of the loop bar (11) is provided with a gear shifting groove (32), the middle part of the left side of the driving sleeve component (12) is fixedly provided with a second bearing (33), a gear shifting fixture block (34) is fixedly installed at the left end of the driving external member (12), the gear shifting fixture block (34) is matched with the gear shifting groove (32), a gear shifting gear set (35) and a wire bunching device (36) are fixedly arranged on the inner surface of the sleeve rod (11), gear grooves are arranged on two sides of the gear shifting clamping block (34), two sides of the gear shifting gear set (35) are respectively matched with the wire bunching device (36) and the gear grooves, a shifting connecting wire (37) is movably connected on the wire bunching device (36), the magnesium alloy bicycle is characterized in that a gear adjuster is fixedly mounted on the magnesium alloy bicycle frame (1), and the other end of the gear shifting connecting line (37) is movably connected with the gear adjuster.

2. The chainless bicycle of claim 1, wherein: drive chuck (4) fixed mounting have bail (23), the outer lane of drive chuck (4) evenly be provided with drive groove (24) and drive crisscross distribution between groove (24) and bail (23), the inner circle of drive external member (12) be provided with spout (27), the outer lane fixed mounting of drive shaft (22) have connecting block (25), connecting block (25) and spout (27) phase-match, the outer lane fixed mounting of drive external member (12) have drive lasso (26), drive lasso (26) and drive groove (24) phase-match, drive lasso (26) include inner circle (28) and outer lane (29), inner circle (28) and drive external member (12) fixed connection, inner circle (28) and outer lane (29) between movable mounting have ball (30).