CN213442933U - Novel chain transmission speed change device - Google Patents

Abstract

The utility model discloses a novel chain transmission speed change device, which comprises a crank and a protection plate, wherein the left end of the crank is provided with the protection plate, the protection plate is connected at the left end of the crank through a sleeve joint, the crank is connected with the protection plate through a sleeve joint, the surface side at the rear end of the protection plate is provided with a chain wheel, and the chain wheel is connected at the surface side at the rear end of the protection plate through a sleeve joint, the utility model changes the traditional integral casting crank mode into the prior mode that the hollow holes are arranged inside the crank, so that the self weight of the crank is lightened through the hollow holes, the protection plate is arranged outside the hollow holes inside the crank, so that the hollow holes are protected by one layer under the action of the protection plate, and the phenomenon that trouser legs are drawn into the hollow holes is avoided, but also prevents external dust from entering the inside of the hole.

Description

Novel chain transmission speed change device

Technical Field

The utility model belongs to the technical field of mechanical transmission is relevant, concretely relates to novel chain drive variable speed device.

Background

The bicycle speed changing system has the function of changing the speed of a bicycle by changing the matching of a chain and chain wheels with different front and rear sizes. The size of the front fluted disc and the size of the rear fluted disc determine the force of the bicycle when the pedals are rotated. The bigger the front fluted disc is, the smaller the rear fluted disc is, and the harder the pedal feels when pedaling. The smaller the front fluted disc is, and the larger the rear fluted disc is, the easier the pedals feel. According to the abilities of different drivers, the speed of the bicycle can be adjusted by adjusting the sizes of the front fluted disc and the rear fluted disc, or the bicycle can be used for different road sections and road conditions, and in addition to the gear ratio, the difference of the number of teeth is worth discussing. The tooth ratio is often heard more densely, i.e. the tooth number drop is small. The difference in the number of teeth means the difference between the hand force and the torque of the tire during shifting, and when the difference is too large, it may suddenly become too heavy or too light, resulting in an indefinite number of revolutions. For the driver, suddenly, the driver applies too much force suddenly and feels a stepping-on empty suddenly when the driver is too light, and the two situations can hurt the knees and influence the stability of the operation.

The prior chain transmission speed change device has the following problems: the existing chain transmission speed changing device needs a user to step on a pedal hard to rotate when riding, so that the bicycle can move forwards, but the bicycle per se has certain weight, so that the bicycle needs larger force to ride when riding, and a rider can be greatly burdened.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel chain drive speed change gear to the current chain drive speed change gear who proposes in solving above-mentioned background art can possess certain weight so can make the problem that causes the extravagant physical power of passerby rides at long-time in-process of riding.

In order to achieve the above object, the utility model provides a following technical scheme: a novel chain transmission speed change device comprises a crank and a protection plate, wherein the protection plate is arranged at the left end of the crank, the protection plate is connected to the left end of the crank through a sleeving connection manner, the crank is connected with the protection plate through a sleeving connection manner, a chain wheel is arranged on the surface side of the rear end of the protection plate, the chain wheel is connected with the protection plate through a sleeving connection manner, a front chain shifter is arranged on the upper right corner of the upper end of the chain wheel and connected to the upper right corner of the upper end of the chain wheel through a sleeving connection manner, the front chain shifter is connected with the chain wheel through a sleeving connection manner, a chain is sleeved on the outer side of the chain wheel for a circle, the chain wheel is connected with the chain through a sleeving connection manner, a flywheel is arranged on the lower side of the left end of the chain, the flywheel is connected to the surface side of the lower end of the chain through, the chain is connected with the flywheel through a sleeve joint, a fixed shaft is arranged at the axle center inside the flywheel, the fixed shaft is connected inside the flywheel through a sleeve joint, the flywheel is connected with the fixed shaft through a sleeve joint, a connecting plate is arranged at the lower end of the flywheel, the connecting plate is fixedly connected with the fixed shaft through a connecting steel frame through bolts, a rear derailleur is arranged at the lower end of the connecting plate, the rear derailleur is connected with the lower end of the connecting plate through bolts, the connecting plate is fixedly connected with the rear derailleur through bolts, a protective frame is arranged at the lower side of the right end of the rear derailleur, the protective frame is connected to the right side of the lower end of the rear derailleur through bolts, the rear derailleur is fixedly connected with the protective frame through bolts, a guide chain wheel is arranged at the inner side of the lower end of the protective frame, the protection frame is connected with the guide chain wheel through cup jointing, a circle in the outside of chain wheel, guide chain wheel and flywheel is provided with the chain, the chain passes through the joint with chain wheel, guide chain wheel and flywheel respectively and is connected.

Preferably, the articulate constitution is including first connector, dust guard, handle arm and second connector, the downside of the right-hand member of first connector is provided with the handle arm, the handle arm passes through whole casting fixed connection with first connector, the table end of both sides respectively is provided with a dust guard around the handle arm, the dust guard is connected through cup jointing with the handle arm, the downside of the right-hand member of handle arm is provided with the second connector, the second connector passes through whole casting fixed connection with the handle arm, the crank passes through bolt fixed connection through first connector and chain wheel.

Preferably, the dust guard comprises a clamping strip and a plate body, the clamping strip is arranged on the rear side of the upper end of the plate body and fixedly connected with the plate body through integral casting, and the dust guard is connected with the handle arm in a sleeved mode through the clamping strip.

Preferably, the handle arm comprises a first clamping hole, a rod body, a second clamping hole and a third clamping hole, the first clamping hole is formed in the surface side of the upper end of the inner portion of the rod body, the second clamping hole is formed in the lower end of the first clamping hole, the third clamping hole is formed in the lower end of the second clamping hole, and the handle arm is fixedly connected with the first connecting head through integral casting through the rod body.

Preferably, the constitution of chain wheel is including first fluted disc, fixed plate, second fluted disc, third fluted disc and connection axle head, the outside a week of connecting the axle head is provided with the fixed plate, the fixed plate passes through welded connection with the connection axle head, the a week in the outside of connecting the axle head is provided with the third fluted disc, the third fluted disc is connected through cup jointing with the connection axle head, the outside a week of third fluted disc is provided with the second fluted disc, the second fluted disc is connected through cup jointing with the connection axle head, the outside a week of second fluted disc is provided with first fluted disc, first fluted disc is connected through cup jointing with the connection axle head, the chain wheel passes through bolt fixed connection with the crank through the connection axle head.

Preferably, the constitution of fixed axle is including end, fixing base, bottom plate, body and cup joint the post, the upper and lower both ends of body respectively are provided with a bottom plate, the bottom plate passes through welded connection with the body, the lower extreme of one side of keeping away from the body of bottom plate is provided with the fixing base, the lower extreme of fixing base is provided with the end, one side of keeping away from the upper end of body of bottom plate is provided with the cover and connects the post, the fixed axle is connected through cup jointing with the flywheel through the cover and connect the post.

Preferably, the front derailleur comprises a chain plate, a device body, an adjusting bolt and a limit stop, the device body is arranged at the upper end of the chain plate, the adjusting bolt is arranged at the upper end of the device body, the limit stop is arranged at the right end of the adjusting bolt, and the front derailleur is connected with a chain wheel through the chain plate in a sleeved mode.

Preferably, first fluted disc, second fluted disc and third fluted disc are the disc body structure of platykurtic, the outer end of first fluted disc, second fluted disc and third fluted disc all is provided with the tooth's socket, the cross-sectional diameter of first fluted disc, second fluted disc and third fluted disc all is different, the cross-sectional diameter of first fluted disc, second fluted disc and third fluted disc diminishes in proper order by the cross-sectional diameter of preceding fluted disc to the back fluted disc.

Preferably, the bottom plate is provided with two altogether, two the bottom plate is the disc body structure of platykurtic, two the inside table side of bottom plate all is provided with the circular shape hole of a plurality of, two the bottom plate sets up respectively at the upper and lower both ends of body, two the bottom plate passes through welded connection with the body.

Preferably, the flywheel is formed by overlapping a plurality of tooth discs, eight tooth discs with different cross-sectional diameters are arranged inside the flywheel, the cross-sectional diameters of the eight tooth discs with different cross-sectional diameters inside the flywheel are sequentially reduced from front to back, and a circular-hole-shaped through hole is formed in each axle center of the eight tooth discs inside the flywheel.

Compared with the prior art, the utility model provides a novel chain drive speed change gear possesses following beneficial effect:

(1) the utility model discloses in through the mode change traditional crank of whole casting for current through be provided with the hole of fretwork form in the inside of crank, can make the self weight of this crank lighten through the hole of this fretwork form like this, can make the weight of overall structure reduce like this, can be more laborsaving when riding, can not make the passerby appear because of the phenomenon of wasting physical power of oneself overweight, thereby solved current chain drive speed change gear can possess certain weight so can lead to the fact the passerby to waste the problem of physical power in the long-time process of riding;

(2) the utility model discloses in be provided with the guard plate through the outside in the hole of the inside fretwork of articulate, can make the hole of this fretwork obtain the protection of one deck under the effect through this guard plate like this, avoided appearing the trouser legs and drawn into the inside of the hole of fretwork, also avoided external dust to enter into the inside of hole moreover, solved difficult abluent problem to make more pleasing to the eye of this articulate outward appearance.

Drawings

Fig. 1 is a schematic structural view of a chain transmission of the present invention;

FIG. 2 is a schematic view of the crank structure of the present invention;

FIG. 3 is a schematic view of the structure of the dust guard of the present invention;

fig. 4 is a schematic view of the handle arm structure of the present invention;

FIG. 5 is a schematic view of the structure of the chain wheel of the present invention;

FIG. 6 is a schematic view of the structure of the fixing shaft of the present invention;

FIG. 7 is a schematic structural view of a front derailleur in accordance with the present invention;

in the figure: 1. a crank; 12. a first connector; 13. a dust-proof plate; 131. clamping the strip; 132. a plate body; 14. a handle arm; 141. a first card hole; 142. a rod body; 143. a second card hole; 144. a third clamping hole; 15. a second connector; 2. a chain wheel; 21. a first fluted disc; 22. a fixing plate; 23. a second fluted disc; 24. a third fluted disc; 25. connecting the shaft ends; 3. a protective frame; 4. a guide sprocket; 5. a rear derailleur; 6. a connecting plate; 7. a fixed shaft; 71. a tip; 72. a fixed seat; 73. a base plate; 74. a body; 75. sleeving the column; 8. a flywheel; 9. a chain; 10. a front derailleur; 101. a chain plate; 102. a body; 103. adjusting the bolt; 104. a limit stop block; 11. and (4) a protective plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a novel chain transmission speed change device comprises a crank 1 and a protection plate 11, wherein the protection plate 11 is arranged at the left end of the crank 1, the protection plate 11 is connected to the left end of the crank 1 through a sleeve joint, the crank 1 comprises a first connector 12, a dust guard 13, a handle arm 14 and a second connector 15, the handle arm 14 is arranged at the lower side of the right end of the first connector 12, the handle arm 14 is fixedly connected with the first connector 12 through integral casting, the front and back surface ends of the handle arm 14 are respectively provided with a dust guard 13, the dust guard 13 comprises a clamping strip 131 and a plate body 132 through the arrangement of the dust guard 13, the rear side of the upper end of the plate body 132 is provided with the clamping strip 131, the clamping strip 131 is fixedly connected with the plate body 132 through the integral casting, the integral casting is fixedly connected, so that the stability of the integral structure can be provided, the dust guard 13 is connected with the handle arm 14 through the clamping, the handle arm 14 comprises a first clamping hole 141, a rod body 142, a second clamping hole 143 and a third clamping hole 144, wherein the first clamping hole 141 is arranged on the surface side of the upper end inside the rod body 142, the second clamping hole 143 is arranged at the lower end of the first clamping hole 141, and the first clamping hole 141, the second clamping hole 143 and the third clamping hole 144 are arranged, so that the weight of the crank 1 can be better reduced, the third clamping hole 144 is arranged at the lower end of the second clamping hole 143, the handle arm 14 is fixedly connected with the first connecting head 12 through the rod body 142 by integral casting, so that the first clamping hole 141, the second clamping hole 143 and the third clamping hole 144 cannot enter dust, the dust guard plate 13 is connected with the handle arm 14 by sleeving, the second connecting head 15 is arranged on the lower side of the right end of the handle arm 14,

a novel chain transmission speed change device comprises a second connector 15 and a handle arm 14 which are fixedly connected through integral casting, a crank 1 is fixedly connected with a chain wheel 2 through a first connector 12 through bolts, the crank 1 is connected with a protection plate 11 through a sleeve, the chain wheel 2 is arranged on the surface side of the rear end of the protection plate 11, the chain wheel 2 is connected on the surface side of the rear end of the protection plate 11 through a sleeve, the chain wheel 2 is connected with the protection plate 11 through a sleeve, a front derailleur 10 is arranged on the upper right corner of the upper end of the chain wheel 2, the front derailleur 10 is connected on the upper right corner of the upper end of the chain wheel 2 through a sleeve, the chain wheel 2 comprises a first chain wheel 21, a fixing plate 22, a second chain wheel 23, a third chain wheel 24 and a connecting shaft end 25, the first chain wheel 21, the second chain wheel 23 and the third chain wheel 24 are both in flat disc body structures, the outer ends of the first chain wheel 21, the second chain wheel 23, tooth grooves are arranged at the outer ends of the first tooth disc 21, the second tooth disc 23 and the third tooth disc 24, so that the first tooth disc 21, the second tooth disc 23 and the third tooth disc 24 can be better connected with the chain 9 in a sleeved mode, the cross-sectional diameters of the first tooth disc 21, the second tooth disc 23 and the third tooth disc 24 are different, the cross-sectional diameters of the first tooth disc 21, the second tooth disc 23 and the third tooth disc 24 are sequentially reduced from the cross-sectional diameter of the front tooth disc to the cross-sectional diameter of the rear tooth disc, a fixing plate 22 is arranged on the periphery of the outer side of the connecting shaft end 25, the fixing plate 22 is connected with the connecting shaft end 25 in a welded mode, the third tooth disc 24 is arranged on the periphery of the outer side of the connecting shaft end 25, the third tooth disc 24 is connected with the connecting shaft end 25 in a sleeved mode, the stability of the whole structure can be provided, the second tooth disc 23 is arranged on the periphery of the outer, the first fluted disc 21 is arranged on the outer periphery of the second fluted disc 23, the first fluted disc 21 is connected with a connecting shaft end 25 in a sleeved mode, the fluted disc 2 is fixedly connected with the crank 1 through a bolt through the connecting shaft end 25, the front derailleur 10 is connected with the fluted disc 2 in a sleeved mode, the front derailleur 10 comprises a chain plate 101, a device body 102, an adjusting bolt 103 and a limit stop 104, the device body 102 is arranged at the upper end of the chain plate 101, the adjusting bolt 103 is arranged at the upper end of the device body 102, the front derailleur 10 can be better fixed and adjusted through the arrangement of the adjusting bolt 103, the limit stop 104 is arranged at the right end of the adjusting bolt 103, the front derailleur 10 is connected with the fluted disc 2 through the chain plate 101 in a sleeved mode, the chain 9 is arranged on the outer periphery of the fluted disc 2 in a sleeved mode, the chain 9 is connected with the outer periphery of the fluted disc 2 in a sleeved mode,

a novel chain transmission speed change device comprises a flywheel 8 arranged on the lower side of the left end of a chain 9, the flywheel 8 is connected to the surface side of the lower end of the chain 9 in a sleeved mode, the chain 9 is connected with the flywheel 8 in a sleeved mode, a fixing shaft 7 is arranged at the axis position inside the flywheel 8, the fixing shaft 7 comprises an end 71, a fixing seat 72, bottom plates 73, a body 74 and sleeved columns 75, two bottom plates 73 are arranged at the upper end and the lower end of the body 74 respectively, the two bottom plates 73 are arranged in a sleeved mode, the fixing effect can be better achieved under the effect of the bottom plates 73 through the arrangement of the two bottom plates 73, a rear wheel can be driven to move, the two bottom plates 73 are flat disc body structures, a plurality of circular holes are formed in the surface sides inside the two bottom plates 73, the two bottom plates 73 are arranged at the upper end and the lower end of the body 74 respectively, the two bottom plates 73, the bottom plate 73 is connected with the body 74 by welding, the lower end of the side, far away from the body 74, of the bottom plate 73 is provided with a fixed seat 72, the lower end of the fixed seat 72 is provided with an end head 71, one side, far away from the upper end of the body 74, of the bottom plate 73 is provided with a sleeve connection column 75, through the arrangement of the sleeve connection column 75, the flywheel 8 can be better and stably connected with the fixed shaft 7 in a sleeve connection manner, the fixed shaft 7 is connected with the flywheel 8 in a sleeve connection manner through the sleeve connection column 75, the fixed shaft 7 is connected in the flywheel 8 in a sleeve connection manner, the flywheel 8 is formed by overlapping a plurality of tooth discs, the flywheel 8 is internally provided with eight tooth discs with different cross-sectional diameters, through holes are formed in the tooth discs of the flywheel 8, the eight tooth discs with different cross-sectional diameters can be better fixed under the effect of the through holes, the eight tooth discs with different, the axle center department of eight fluted discs inside flywheel 8 all is provided with a round hole form through-hole, flywheel 8 is connected through cup jointing with fixed axle 7, the lower extreme of flywheel 8 is provided with connecting plate 6, connecting plate 6 passes through bolt fixed connection through connecting steelframe and fixed axle 7, the lower extreme of connecting plate 6 is provided with rear derailleur 5, rear derailleur 5 passes through bolted connection at the lower extreme of connecting plate 6, connecting plate 6 passes through bolt fixed connection with rear derailleur 5, the downside of the right-hand member of rear derailleur 5 is provided with protection frame 3, protection frame 3 passes through the right side of the lower extreme of rear derailleur 5 of bolted connection, rear derailleur 5 passes through bolt fixed connection with protection frame 3, the inboard of the lower extreme of protection frame 3 is provided with guide sprocket 4, guide sprocket 4 connects the inboard at the lower extreme of protection frame 3 through cup jointing, protection frame 3 and guide sprocket 4 connect through cup jointing, chain wheel 2, A chain 9 is arranged on the outer sides of the guide chain wheel 4 and the flywheel 8 in a circle, and the chain 9 is connected with the chain wheel 2, the guide chain wheel 4 and the flywheel 8 in a clamping mode respectively.

The utility model discloses a theory of operation and use flow: after the utility model is installed, when the novel chain transmission device is used, the chain transmission device can be installed and fixed, and the chain transmission device is generally installed in the bicycle, so that the bicycle can be used more conveniently, when a rider uses the bicycle, the crank 1 can be rotated, the chain wheel 2 can be driven to do circular motion under the condition that the crank 1 does circular motion, the chain wheel 2 can drive the chain 9 to rotate during the motion, when the chain 9 operates, the flywheel 8 can be rotated under the action of the guide chain wheel 4, and the tension of the chain 9 can be relieved under the action of the guide chain wheel 4, thus, the sleeving column 75 in the fixed shaft 7 can move under the rotation of the flywheel 8, forward power can be provided for the bicycle, when speed change is needed, if speed change action is needed, the speed of riding can be adjusted by changing the meshing of the chain 9, the flywheel 8 and the chain wheel 2, the strength required by a rider to drive the crank 1 when the rider steps on pedals is determined by the diameter of one circle of the chain 9 surrounding the chain wheel 2 and the diameter of one circle of the flywheel 8, the larger the diameter of the section of the chain wheel 2 is, the smaller the diameter of the section of the flywheel 8 is, the harder the rider rides, and the higher the riding speed is; conversely, the smaller the cross-sectional diameter of chain wheel 2, the larger the cross-sectional diameter of flywheel 8, the more effort and the slower the riding speed, when a gear shift is to be performed, the rider can cause front derailleur 10 to cause take-up chain 9 to move from one revolution of the tooth spaces of first tooth disc 21 inside chain wheel 2 to one revolution of the outer sides of the tooth spaces of second tooth disc 23 by the transmission inside the handle at the end of the grip, and then cause chain 9 to move inside the larger tooth disc of flywheel 8 by rear derailleur 5, thus completing the downshift operation, if an upshift is required, the rider can cause front derailleur 10 to cause take-up chain 9 to cause second tooth disc 23 inside chain wheel 2 to move inside first tooth disc 21 by the transmission inside the handle inside the grip, and then cause the smaller tooth disc inside flywheel 8 by rear derailleur 5, this has just so accomplished the operation of shifting up the gear, if the contact distance between rear derailleur 5 and flywheel 8 is not enough, at this moment can make rear derailleur 5 can adjust through adjusting screw, change the mode of traditional whole casting crank 1 into current through the inside at crank 1 be provided with the hole of fretwork form, can make the hole through this fretwork form make the weight of this crank 1's self lighten like this, can make overall structure's weight reduce like this, can be more laborsaving when riding, can not make the passerby appear because self overweight leads to the phenomenon of extravagant physical power, can make guide sprocket 4 drive chain 9 better and move like this, just so accomplished this chain drive's use.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A novel chain transmission speed change device comprises a crank (1) and a protection plate (11), and is characterized in that: the left end of crank (1) is provided with guard plate (11), guard plate (11) is through cup jointing the left end of connecting in crank (1), the table side of the rear end of guard plate (11) is provided with chain wheel (2), chain wheel (2) is through cup jointing the table side of connecting in the rear end of guard plate (11), the upper right corner of the upper end of chain wheel (2) is provided with preceding derailleur (10), preceding derailleur (10) is through cup jointing the upper right corner of connecting in the upper end of chain wheel (2), the outside a week of chain wheel (2) is cup jointed and is provided with chain (9), the downside of the left end of chain (9) is provided with flywheel (8), flywheel (8) is through cup jointing the table side of connecting at the lower extreme of chain (9), the axle center department of the inside of flywheel (8) is provided with fixed axle (7), fixed axle (7) is through cup jointing the inside of connecting in flywheel (8), the lower end of the flywheel (8) is provided with a connecting plate (6), the connecting plate (6) is fixedly connected with a fixed shaft (7) through a bolt through a connecting steel frame, the lower end of the connecting plate (6) is provided with a rear derailleur (5), the rear derailleur (5) is connected to the lower end of the connecting plate (6) through a bolt, the connecting plate (6) is fixedly connected with the rear derailleur (5) through a bolt, a protective frame (3) is arranged on the lower side of the right end of the rear derailleur (5), the protective frame (3) is connected to the right side of the lower end of the rear derailleur (5) through a bolt, the rear derailleur (5) is fixedly connected with the protective frame (3) through a bolt, a guide chain wheel (4) is arranged on the inner side of the lower end of the protective frame (3), the guide chain wheel (4) is connected to the inner side of the lower end of the protective frame (3) through a sleeve joint, and the protective frame (, chain (9) are provided with in a week in the outside of chain wheel (2), leading sprocket (4) and flywheel (8), chain (9) are connected through the joint with chain wheel (2), leading sprocket (4) and flywheel (8) respectively.

2. A novel chain drive transmission as claimed in claim 1, wherein: the composition of crank (1) is including first connector (12), dust guard (13), handle arm (14) and second connector (15), the downside of the right-hand member of first connector (12) is provided with handle arm (14), handle arm (14) and first connector (12) are through whole casting fixed connection, the table end of both sides respectively is provided with one dust guard (13) around handle arm (14), dust guard (13) and handle arm (14) are through cup jointing and being connected, the downside of the right-hand member of handle arm (14) is provided with second connector (15), second connector (15) and handle arm (14) are through whole casting fixed connection, crank (1) is through bolt fixed connection through first connector (12) and chain wheel (2).

3. A novel chain drive transmission as claimed in claim 2, wherein: the dust guard (13) comprises a clamping strip (131) and a plate body (132), wherein the clamping strip (131) is arranged on the rear side of the upper end of the plate body (132), the clamping strip (131) is fixedly connected with the plate body (132) through integral casting, and the dust guard (13) is connected with the handle arm (14) in a sleeved mode through the clamping strip (131).

4. A novel chain drive transmission as claimed in claim 2, wherein: the handle arm (14) comprises a first clamping hole (141), a rod body (142), a second clamping hole (143) and a third clamping hole (144), wherein the first clamping hole (141) is formed in the surface side of the upper end of the inner portion of the rod body (142), the second clamping hole (143) is formed in the lower end of the first clamping hole (141), the third clamping hole (144) is formed in the lower end of the second clamping hole (143), and the handle arm (14) is fixedly connected with the first connecting head (12) through the rod body (142) in an integral casting mode.

5. A novel chain drive transmission as claimed in claim 1, wherein: the tooth disc (2) comprises a first tooth disc (21), a fixed plate (22), a second tooth disc (23), a third tooth disc (24) and a connecting shaft end (25), a fixing plate (22) is arranged on the outer periphery of the connecting shaft end (25), the fixing plate (22) is connected with the connecting shaft end (25) through welding, a third fluted disc (24) is arranged on the outer side of the connecting shaft end (25) in a circle, the third fluted disc (24) is connected with the connecting shaft end (25) through a sleeve joint, a second fluted disc (23) is arranged on the outer circumference of the third fluted disc (24), the second fluted disc (23) is connected with the connecting shaft end (25) through a sleeve joint, a first fluted disc (21) is arranged on the outer circumference of the second fluted disc (23), first fluted disc (21) is connected through cup jointing with connecting shaft end (25), fluted disc (2) passes through connecting shaft end (25) and crank (1) through bolt fixed connection.

6. A novel chain drive transmission as claimed in claim 1, wherein: the fixed shaft (7) comprises a head (71), a fixed seat (72), a bottom plate (73), a body (74) and a socket column (75), wherein the upper end and the lower end of the body (74) are respectively provided with the bottom plate (73), the bottom plate (73) is connected with the body (74) in a welding mode, the lower end of one side, away from the body (74), of the bottom plate (73) is provided with the fixed seat (72), the lower end of the fixed seat (72) is provided with the head (71), one side, away from the upper end of the body (74), of the bottom plate (73) is provided with the socket column (75), and the fixed shaft (7) is connected with the flywheel (8) through the socket column (75) in a socket mode.

7. A novel chain drive transmission as claimed in claim 1, wherein: the front derailleur (10) comprises a chain plate (101), a body (102), an adjusting bolt (103) and a limit stop (104), wherein the body (102) is arranged at the upper end of the chain plate (101), the adjusting bolt (103) is arranged at the upper end of the body (102), the limit stop (104) is arranged at the right end of the adjusting bolt (103), and the front derailleur (10) is connected with a chain wheel (2) through the chain plate (101) in a sleeved mode.

8. A novel chain drive transmission as claimed in claim 5, wherein: first fluted disc (21), second fluted disc (23) and third fluted disc (24) are the disc body structure of platykurtic, the outer end of first fluted disc (21), second fluted disc (23) and third fluted disc (24) all is provided with the tooth's socket, the cross-sectional diameter of first fluted disc (21), second fluted disc (23) and third fluted disc (24) all is different, the cross-sectional diameter of first fluted disc (21), second fluted disc (23) and third fluted disc (24) diminishes in proper order by the cross-sectional diameter of preceding fluted disc after to in proper order.

9. A novel chain drive transmission as claimed in claim 6, wherein: the bottom plate (73) is provided with two altogether, two bottom plate (73) are the disc body structure of platykurtic, two the table side of the inside of bottom plate (73) all is provided with the circular shape hole of a plurality of, two bottom plate (73) set up respectively at the upper and lower both ends of body (74), two bottom plate (73) pass through welded connection with body (74).

10. A novel chain drive transmission as claimed in claim 1, wherein: flywheel (8) are that a plurality of fluted disc coincide constitutes, the inside of flywheel (8) is provided with the fluted disc of eight different cross section diameters altogether, the fluted disc of eight different cross section diameters of flywheel (8) inside diminishes in proper order by the cross section diameter of preceding fluted disc to the back in proper order, the axle center department of eight fluted discs of flywheel (8) inside all is provided with the through-hole of a round hole form.

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