CN2113941U

CN2113941U - Bicycle drive

Info

Publication number: CN2113941U
Application number: CN 92200747
Authority: CN
Inventors: 刘振峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-01-18
Filing date: 1992-01-18
Publication date: 1992-08-26

Abstract

The utility model relates to a bicycle drive. An elliptic plate is arranged on the external side of the drive gear of the bicycle, and the design of the pedal adopts a telescopic link; under the mating of the bicycle drive and a rolling wheel, the pedal crank is elongated on the position of force application and is shortened on a back side, and a power-saving effect can be realized. An automatic transmission device arranged between the drive gear and the driven gear of the rear wheel is provided with a drive shaft and a driven shaft, the drive shaft and the driven shaft are matched with a driving belt, a driving chain, springs and a ratchet wheel, and the displacement of a steel ball is controlled by the centrifugal force to realize the efficiency of automatic transmission.

Description

Bicycle drive

The utility model relates to a kind of bicycle driving device, be particularly related to a kind of automatic speed changing labour-saving bicycle actuating device, this device is to fixedly install two ellipses in the bicycle driven wheel outside, and pedal crank adopted expansion link design, cooperate a roller that pedal crank is extended when preceding half force application location, better leverage is provided, and can reach the labor-saving effect, in between bicycle driven wheel of the present utility model and trailing wheel driven gear, one automatic shift device is set again, thereby can reaches the self-shifting effect.

Existing bicycle shift structure is broadly divided into two kinds, wherein a kind of is the interior speed changing structure of hind axle, it is the gear that different-diameter is set in the hind axle inboard of bicycle, and transmission system is controlled by a cable wire, and the rider can spur the purpose that cable wire reaches speed change by control mechanism; Another kind of then be in comparatively common on the market design, it is general to see on the variable speed bicycle of various types, its speed changing structure is that the gear by the multi-disc different-diameter is assembled on the hind axle (also can arrange in pairs or groups the multi-disc gear that is arranged at the driven wheel place and reach more multistage speed change effect) side by side, the rider spurs cable wire as required and controls transmission system make the chain replacing of beating between each gear, and reaches the purpose of speed change.

Therefore, aforementioned existing derailleur all is to control its transmission system by the rider by a cable wire or allied equipment, drive the effect that seasonal actuating device provides speed change and reach, because such device must be done in good time control by rider's experience when operation, therefore, if misoperation singly can't not brought into play the speed change effect of its bicycle, the rider is more required great effort when driving; Moreover, when the existing derailleur of control, all must be by the rider to carry out maneuver control device on the other hand, this causes the threat on the safety again, especially the stability of bicycle itself is not again very perfect, when the rider wants its speed of trampling of conversion, must be with on the other hand by decontroling maneuver control device on the bicycle handle, this is real to be superior inadequately the causing of existing derailleur design.

Analyze by another angle again, existing bicycle driving device, its pedal crank all is fixed designs, because the degree of crook of rider's shank is subjected to the restriction of stature, thereby pedal crank all has the restriction of its length, and can't bring into play better leverage, and so that being provided, the rider more tramples mode in the labour-saving, and this also is a shortcoming in the existing bicycle structure design.

Primary and foremost purpose of the present utility model is: a kind of automatic speed changing labour-saving bicycle actuating device is provided, this device is assembling one automatic shift device between driven wheel and trailing wheel driven gear, adjust its converter speed ratio by this automatic shift device voluntarily according to the gait of march of bicycle, and can bring into play the laborsaving effectiveness of transmission system the best.

A purpose more of the present utility model is: a kind of automatic speed changing labour-saving bicycle actuating device is provided, it is to fixedly install two ellipses in the bicycle driven wheel outside, and pedal crank is adopted the design of expansion link, cooperate a roller that pedal crank is extended when preceding half force application location, better leverage is provided, and shortens, like this in rear side, neither influence rider's trample action, can reach the labor-saving effect again.

Automatic speed changing labour-saving bicycle actuating device provided by the utility model, be between the driven gear of driven wheel that bicycle pedal crank drives and rear wheel-side, to be provided with transmission system, and can provide laborsaving effect by pedal crank, and cooperate transmission system that the self-shifting effect is provided, wherein:

Be provided with an imput shaft and a driven shaft in the shell of transmission system, imput shaft is pivoted with bearing and is assembled in the shell, on imput shaft, be provided with a keyway, an end that passes shell in imput shaft is installed with the drive sprocket that an inside is provided with ratchet, this drive sprocket is to be connected mutually with driven wheel by chain drive-belt, the sheathed axle sleeve that is assembled with on imput shaft, this axle sleeve inboard is provided with a keyway that matches with the imput shaft keyway, and can cooperate a key that the axle sleeve assembling is fixed on the imput shaft;

Be installed with a fixing cone-plate at an end of aforementioned axle sleeve, and on axle sleeve, be arranged with a movable cone-plate, fixedly between cone-plate and movable cone-plate folder establish and be assembled with the displacement steel ball, end in addition at this axle sleeve is made as a thread end, then be again one to be the binding end of dentation in the inboard of thread end, side in addition at movable cone-plate is a power-transfer clutch adapter plate, the central authorities of this power-transfer clutch adapter plate are a combined hole that matches with the axle sleeve binding end, it can be assembled on the thread end of axle sleeve by a nut ring, and the power-transfer clutch adapter plate fixedly is assembled on the binding end of axle sleeve, and folder is established drive belt between movable cone-plate and power-transfer clutch adapter plate, is provided with recessed engagement groove in power-transfer clutch adapter plate one side in addition;

Periphery at the aforementioned clutch adapter plate fixedly is assembled with fixed mount, outer end at fixed mount is provided with positioning plate, and the stage casing of fixed mount positioning plate side be provided with one the assembling poke rod pivoted hole, poke rod is a L-shaped body of rod, be provided with the Pivot that matches with the fixed mount pivoted hole in its bending place, and the two ends of poke rod are respectively struck side and assembling end, again on this assembling is held with the sheathed steel ball that is assembled with of little nut; Side in addition at the power-transfer clutch adapter plate then is a power-transfer clutch portable plate, in power-transfer clutch portable plate central authorities is a square hole, and be provided with the protrusion clamping block that matches with power-transfer clutch adapter plate engagement groove with respect to power-transfer clutch adapter plate side, this power-transfer clutch portable plate is to be sheathed on imput shaft with central square hole to hold institute's stack-mounted square shaft to put in addition, and an end of this square shaft cover is installed with the transmission head sprocket that is one, and between transmission head sprocket and power-transfer clutch portable plate, be folded with a clutch spring, outside transmission head sprocket and imput shaft, be folded with a packing ring simultaneously between side bearing; On driven shaft, be provided with the multiple tracks annular groove, and be provided with the oblique rail of protrusion in the axle sleeve stage casing, an end that passes shell at driven shaft is installed with a driven sprocket, this driven sprocket is to be connected mutually with driven gear with driven chain, and the power of transmission system can be conducted to driven gear, the two ends of driven shaft are pivoted with bearing and are assembled on the shell, on driven shaft, cooperate C type ring and the sheathed axle sleeve that is assembled with of little bearing, end at axle sleeve is installed with fixedly cone-plate, and be equipped with ratchet in the inboard of end in addition at axle sleeve, its can with driven shaft on match by the fastening tooth of spring ejection, be unidirectional gearing between axle sleeve and driven shaft and make; The sheathed movable cone-plate that is assembled with is provided with skewed slot in the sliding sleeve of movable cone-plate on axle sleeve, and it is the assembling that matches with oblique rail on the axle sleeve, axle sleeve in addition end then be assembled with an adapter plate, between this adapter plate and movable cone-plate, be folded with a pushing clamping spring; Sheathedly on the driven shaft of axle sleeve side be assembled with a transmission from sprocket wheel, this transmission is to be assembled in location on the driven shaft by two C type rings from sprocket wheel, be provided with ratchet in this transmission from the medium pore inboard of sprocket wheel, its can with driven shaft on match by the fastening tooth of spring ejection, and make transmission be unidirectional gearing between sprocket wheel and driven shaft.

Aforementioned automatic speed changing labour-saving bicycle actuating device provided by the utility model, wherein on the position of chassis mount pedal crank, be pivoted with axle drive shaft, be installed with driven wheel in axle drive shaft one side, simultaneously be set with ellipse respectively in the driven wheel both sides, fixedly be assembled with the crank cover at axle drive shaft two ends, the outside of ellipse, one end inboard of this crank cover is provided with the axis hole that cooperates with axle drive shaft, and be provided with fixing threaded hole and the combination screw that wears assembling bolt of rear end plate and assembling bolt in a side, in this crank cover, be assembled with an expansion link, one end of this expansion link is pivoted and is assembled with pedal, side at expansion link is provided with the fixing threaded hole that wears bolt of rear end plate simultaneously, this bolt of rear end plate can match with the bolt of rear end plate that crank puts, and can make at crank cover and the inboard assembling of expansion link one spring, be provided with the chute of strip in addition in a side of expansion link, this chute can put institute's stack-mounted assembling bolt with crank and match, in order to the flexible scope of control expansion link in the crank cover, be provided with a roller shaft in the inboard of expansion link in addition, and can assemble a roller that cooperates ellipse to use thereon.

Below in conjunction with drawings and Examples, further specify architectural feature of the present utility model and purpose, wherein:

Fig. 1 provides the integral structure configuration schematic diagram of automatic speed changing force-saving bicycle driving device for the utility model;

Fig. 2 is the driven wheel and the pedal crank element decomposing schematic representation partly of automatic speed changing labour-saving bicycle actuating device provided by the utility model;

Fig. 3 is the driven wheel and the pedal crank combination side-looking action scheme drawing partly of automatic speed changing labour-saving bicycle actuating device provided by the utility model;

Fig. 4 for the utility model the transmission system that automatic speed changing labour-saving bicycle actuating device is provided in imput shaft element decomposing schematic representation partly;

Fig. 5 is the structural representation that the power-transfer clutch adapter plate of automatic speed changing labour-saving bicycle actuating device provided by the utility model matches with the power-transfer clutch portable plate;

Fig. 6 for the utility model the transmission system that automatic speed changing labour-saving bicycle actuating device is provided in driven shaft element decomposing schematic representation partly;

Fig. 7 be the transmission system of automatic speed changing labour-saving bicycle actuating device provided by the utility model in starting or at a slow speed the time, the combination cross-sectional view when driving by a side driving chain;

Fig. 8 be the transmission system of automatic speed changing labour-saving bicycle actuating device provided by the utility model when high speed, the combination cross-sectional view when driving by drive belt;

Fig. 9 is the ratchet structure plan sketch of automatic speed changing labour-saving bicycle actuating device provided by the utility model;

See also shown in Figure 1, it is the integral structure configuration schematic diagram of automatic speed changing labour-saving bicycle actuating device provided by the utility model, in vehicle frame 10 central authorities is a driven wheel 11, and be provided with driven gear 14 at its rear side, between driven wheel 11 and driven gear 14, be provided with simultaneously a transmission system 30, aforementioned driven wheel 11 by a chain drive-belt 12 with power transmission to transmission system 30, through after the speed change again by a driven chain 13 with driven gear 14 places of power transmission to rear wheel-side, rotate bicycle advanced and drive trailing wheel.

As shown in Figure 2, driven wheel 11 and pedal crank element decomposing schematic representation partly for automatic speed changing labour-saving bicycle actuating device provided by the utility model, in vehicle frame 10, be pivoted with axle drive shaft 21, be installed with driven wheel 11 in axle drive shaft 21 1 sides, simultaneously be set with two ellipses 20 in driven wheel 11 both sides, lower edge at two ellipses 20 is respectively arranged with arc plate 201, use at ellipse 20 lower edges and 201 of arc plates and form a guide rail 202, fixedly be assembled with crank cover 22 in addition at axle drive shaft 21 two ends, the outside of ellipse 20, one end inboard of this crank cover 22 is provided with the axis hole 221 that cooperates with axle drive shaft 21, and be provided with fixing threaded hole 222 and the combination screw 224 that is used to wear assembling bolt of rear end plate 223 and assembling bolt 225 in a side, in this crank cover 22, be assembled with an expansion link 23, one end of this expansion link 23 is pivoted and is assembled with pedal 231, side at expansion link 23 is provided with the fixing threaded hole 232 that is used to wear bolt of rear end plate 233 simultaneously, this bolt of rear end plate 233 can match with the bolt of rear end plate 223 that crank overlaps on 22, and the two ends branch of spring 24 is fixed, make spring 24 be assembled into 23 of crank cover 22 and expansion links, in addition, be provided with the chute 234 of strip in a side of expansion link 23, this chute 234 can overlap that institute's stack-mounted assembling bolt 225 matches on 22 with crank, in order to the flexible scope of restriction expansion link 23 in crank cover 22, be provided with a roller shaft 235 in addition in the inboard of expansion link 23, on this roller shaft 235, be assembled with a roller 236, this roller 236 can match with ellipse 20, when pedal 231 is stepped on, allow roller 236 around ellipse 20, roll.

The automatic speed changing labour-saving bicycle actuating device driven wheel 11 provided by the utility model and the pedal crank combination side-looking action scheme drawing partly that cooperate Fig. 3, when expansion link 23 is assembled in the crank cover 22, the two ends of spring 24 are respectively with bolt of rear end plate 223,233 assembled fixing, thereby expansion link 23 can inwardly be drawn by spring 24, while roller 236 can abut against the outer rim of ellipse 20 and roll, when rider's pushes pedals 231, its expansion link 23 promptly can roll along ellipse 20 outer rims because of roller 236, and make spring 24 stretch, and roller 236 is rolled along the guide rail 202 of arc plate 201 inboards at the lower edge of ellipse 20, and make expansion link 23 and crank cover 22 extend the longest position in a side of the application of force, then make in the expansion link 23 retraction cranks cover 22 in other side, and better leverage can be provided, simultaneously can not influence rider's trample action, thereby can reach the labor-saving effect.

Shown in Fig. 4, imput shaft 32 element decomposing schematic representation partly in the speed-changing mechanism 30 of automatic speed changing labour-saving bicycle actuating device is provided for the utility model, on this imput shaft 32, be provided with a keyway 321, and be installed with the drive sprocket 33 that an inside is provided with ratchet at the end that imput shaft 32 passes shell 31, this drive sprocket 33 is to be connected mutually with driven wheel 11 by chain drive-belt 12, and driven rotation by driven wheel 11, simultaneously on the appropriate location, two ends of imput shaft 32, be arranged with bearing 34, and imput shaft 32 is assembled on the shell 31 of transmission system 30, the also sheathed axle sleeve 35 that is assembled with on the imput shaft 32, these axle sleeve 35 inboards are provided with a keyway 351 that matches with imput shaft 32 keyways 321, and cooperate a key 352 that axle sleeve 35 assemblings are fixed on the imput shaft 32.

Be installed with a fixing cone-plate 353 at an end of aforementioned axle sleeve 35, and on axle sleeve 35, also be arranged with a movable cone-plate 36, establish at fixing 36 folders of cone-plate 353 and movable cone-plate and to be assembled with displacement steel ball 37, this displacement steel ball 37 can be mobile in fixing cone-plate 353 steel bead groove 3531 set by movable cone-plate 36 sides, end in addition at this axle sleeve 35 is a thread end 354, in the inboard of this thread end 354 is the binding end 355 of a dentation, side in addition at movable cone-plate 36 is provided with a power-transfer clutch adapter plate 38, the central authorities of this power-transfer clutch adapter plate 38 are a combined hole 382 that matches with axle sleeve 35 binding ends 355, it can be assembled on the thread end 354 of axle sleeve 35 by a nut ring 39, and power-transfer clutch adapter plate 38 fixedly is assembled on the binding end 355 of axle sleeve 35.

Periphery at aforementioned clutch adapter plate 38 fixedly is assembled with fixed mount 40, be provided with positioning plate 401 in the outer end of fixed mount 40, and be provided with pivoted hole 402 in the stage casing of fixed mount 40 positioning plate 401 sides, this fixed orifice 402 is in order to assemble a poke rod 41, this poke rod 41 is a L-shaped body of rod, be provided with the Pivot 411 that matches with fixed mount 40 pivoted holes 402 in its bending place, and the two ends of poke rod 41 are respectively struck side 412 and assembling end 413, hold the sheathed steel ball 414 that is assembled with on 413 in this assembling again, this steel ball 414 is assembled on the assembling end 413 by little nut 415.

Side in addition at power-transfer clutch adapter plate 38 then is a power-transfer clutch portable plate 42, in power-transfer clutch portable plate 42 central authorities one square hole 421 is arranged, and at the clamping block 422 that is provided with protrusion with respect to power-transfer clutch adapter plate 38 sides, this power-transfer clutch portable plate 42 is to be sheathed on imput shaft 32 with central square hole 421 to hold in addition on institute's stack-mounted square shaft cover 43, and an end of this square shaft cover 43 is installed with the transmission head sprocket 431 that is one, and being folded with a clutch spring 44 at transmission head sprocket 431 and 42 of power-transfer clutch portable plates, 34 of side bearings are folded with a packing ring 45 outside transmission head sprocket 431 and imput shaft 32 simultaneously.

The structural representation that is provided the power-transfer clutch adapter plate 38 of automatic speed changing labour-saving bicycle actuating device to match by the utility model of Fig. 5 with power-transfer clutch portable plate 42, can see that the side at power-transfer clutch adapter plate 38 is provided with recessed engagement groove 381, respective side at power-transfer clutch portable plate 42 then is provided with the protrusion clamping block 422 that matches, thereby the effect of power-transfer clutch can be provided when fitting mutually or breaking away from.

Shown in Fig. 6, driven shaft 50 element decomposing schematic representation partly in the speed-changing mechanism 30 of automatic speed changing labour-saving bicycle actuating device is provided for the utility model, on driven shaft 50, be provided with multiple tracks annular groove 501, end at driven shaft 50 is installed with a driven sprocket 51 again, this driven sprocket 51 is connected with driven gear 14 mutually by driven chain 13, and the power of transmission system 30 is conducted to driven gear 14, using the drive bicycle advances, the two ends of driven shaft 50 are assembled on the shell 31 by bearing 52 respectively, on driven shaft 50, cooperate C type ring 531 and the little bearing 53 sheathed axle sleeves 54 that are assembled with, end at axle sleeve 54 is installed with fixedly cone-plate 541, and be equipped with ratchet 542 in the inboard of end in addition at axle sleeve 54, its can with driven shaft 50 on match by the fastening tooth 503 of spring 502 ejections, and provide the unidirectional gearing of the ratchet of 50 of axle sleeve 54 and driven shafts.

The sheathed movable cone-plate 55 that is assembled with is provided with skewed slot 552 in the sliding sleeve 551 of this activity cone-plate 55 on axle sleeve 54, and it matches with oblique rail 543 on the axle sleeve 54, but the slip mode of restraint cone-plate 55 on axle sleeve 54; Be assembled with an adapter plate 56 at axle sleeve 54 other ends, be folded with a pushing clamping spring 57 at this

adapter plate

56 and 55 of movable cone-plates, with thinking that movable cone-plate 55 provides restoring force.

Sheathedly on the driven shaft 50 of axle sleeve 54 sides be assembled with a transmission from sprocket wheel 58, this transmission is assembled and is positioned on the driven shaft 50 by two C type rings 59 from sprocket wheel 58, be provided with ratchet 582 in this transmission from medium pore 581 inboards of sprocket wheel 58, its can with driven shaft 50 on match by the fastening tooth 505 of spring 504 ejections, and for transmission from the unidirectional gearing of ratchet is provided between sprocket wheel 58 and the driven shaft 50.

Fig. 7 is provided automatic speed changing labour-saving bicycle actuating device transmission system 30 in starting or at a slow speed the time by the utility model, combination cross-sectional view when driving by a side driving chain 60, when transmission system 30 assemblings are finished, imput shaft 32 is hubbed in the shell 31 by two bearings 34, on imput shaft 32 ends in shell 31 outsides, be installed with drive sprocket 33, sheathed assembling also has axle sleeve 35 on imput shaft 32, and between the keyway 351 of the keyway 321 of imput shaft 32 and axle sleeve 35, be assembled with a key 352, do to rotate synchronously and allow imput shaft 32 can drive axle sleeve 35, and on axle sleeve 35, be assembled with the movable cone-plate 36 relative and in that fixedly 36 of cone-plate 353 and movable cone-plates are assembled with displacement steel ball 37 with fixing cone-plate 353, on the thread end 354 of axle sleeve 35, be assembled with a nut ring 39, power-transfer clutch adapter plate 38 fixedly is assembled on the binding end 355 of axle sleeve 35, this power-transfer clutch adapter plate 38 matches with movable cone-plate 36, drive belt 61 folders are established therebetween, and formed a belt pulley.

At the sheathed square shaft cover 43 that is assembled with of holding in addition of imput shaft 32 assembling axle sleeves 35, end at this square shaft cover 43 is provided with the transmission head sprocket 431 that is one, sheathed power-transfer clutch portable plate 42 and the clutch spring 44 of being assembled with on square shaft cover 43, wherein the clamping block 422 of power-transfer clutch portable plate 42 1 sides just can be snapped in the engagement groove 381 of power-transfer clutch adapter plate 38, and be hubbed at poke rod 41 in power-transfer clutch adapter plate 38 outside fixed mounts 40 pivoted holes 411, its struck side 412 just is located in 42 of power-transfer clutch adapter plate 38 and power-transfer clutch portable plates, and is fixed with steel ball 414 with little nut 415 on the assembling end 413 of this poke rod 41.

Driven shaft 50 is hubbed in the shell 31 by two bearings 52, on driven shaft 50 ends in shell 31 outsides, be installed with driven sprocket 51, on driven shaft 50, cooperate C type ring 531 and little bearing 53 with sheathed assembling axle sleeve 54, and match with stack-mounted fastening tooth 503 on the driven shaft 50 with ratchet 542 in that the in addition end of axle sleeve 54 is inboard, be unidirectional transmission between axle sleeve 54 and the driven shaft 50 and cooperate and make.

The sheathed movable cone-plate 55 that is assembled with on axle sleeve 54, skewed slot 552 matches with oblique rail 543 on the axle sleeve 54 in the sliding sleeve 551 of this activity cone-plate 55; Then be assembled with an adapter plate 56 at axle sleeve 54 other ends, be folded with a pushing clamping spring 57 at this

adapter plate

56 and 55 of movable cone-plates, in addition, sheathedly on the driven shaft 50 of axle sleeve 54 sides be assembled with a transmission from sprocket wheel 58, this transmission also is to match with fastening tooth 505 on the driven shaft 50 with ratchet 582 from sprocket wheel 58, cooperates and make transmission be unidirectional transmission from 50 of sprocket wheel 58 and driven shafts.

Please cooperate Fig. 8, this figure is that automatic speed changing labour-saving bicycle actuating device speed-changing mechanism 30 provided by the utility model is when high speed, combination cross-sectional view when driving by drive belt 61, when the bicycle that is assembled with the utility model automatic speed changing labour-saving bicycle actuating device in starting or when proceeding slowly, transmission system 30 promptly as shown in Figure 7, power-transfer clutch portable plate 42 can be subjected to the pushing and pressing of clutch spring 44 and fit with power-transfer clutch adapter plate 38, and clamping block 422 is fastened in the engagement groove 381, this moment, power was imported in the transmission system 30 by drive sprocket 33, driving axle sleeve 35 via imput shaft 32 rotates, drive power-transfer clutch portable plate 42 by power-transfer clutch adapter plate 38 again and rotate, drive driving chain 60 via square shaft cover 43 and transmission head sprocket 431 again power is reached transmission from sprocket wheel 58; When transmission is driven when rotating by driving chain 60 from sprocket wheel 58, promptly can via ratchet 582 with fasten cooperating of tooth 505, drives driven shaft 50 and rotate, and drive driven gear 14 via driven sprocket 51 and driven chain 13 and rotate, and the drive bicycle advances.

When the gait of march of bicycle is enough fast, steel ball 414 in the transmission system 30 can be subjected to centrifugal action, and make poke rod 41 deflection laterally, thereby can overcome the elastic force of clutch spring 44 by struck side 412, and power-transfer clutch portable plate 42 is outwards pushed aside, the clamping block 422 of power-transfer clutch portable plate 42 is thrown off with the engagement groove 381 of power-transfer clutch adapter plate 38, rotate and make transmission head sprocket 431 no longer be driven by imput shaft 32, this moment, transmission system 30 promptly was responsible for transmission by drive belt 61; After power-transfer clutch portable plate 42 and power-transfer clutch adapter plate 38 break away from, its power promptly conducts to other side by the drive belt 61 that is folded in 38 of movable cone-plate 36 and power-transfer clutch adapter plates and is located in driven shaft 50 fixedly on the drive belt 61 of 55 of cone-plate 541 and movable cone-plates, rotate and can drive the belt pulley that is constituted by fixing cone-plate 541 and movable cone-plate 55, driving driven shaft 50 by axle sleeve 54 via ratchet 542 and fastening tooth 503 again rotates, rotate and can drive driven gear 14, advance and drive bicycle via driven sprocket 51 and driven chain 13.

At power-transfer clutch portable plate 42 during just with 38 disengagings of power-transfer clutch adapter plate, displacement steel ball 37 still is positioned near on the position of imput shaft 32, thereby the drive belt 61 that is folded in 38 of movable cone-plate 36 and power-transfer clutch adapter plates can be positioned near on the position of imput shaft 32, simultaneously in addition side be located in driven shaft 50 fixedly 61 of the drive belts of 55 of cone-plate 541 and movable cone-plates be positioned at from driven shaft 50 position far away, thereby trample comparatively laborsaving at this moment, when speed is accelerated gradually, because displacement steel ball 37 is subjected to centrifugal action and can overcomes the elastic force of pushing clamping spring 57 and outwards mobile, and make the drive belt 61 that is folded in 38 of movable cone-plate 36 and power-transfer clutch adapter plates gradually away from imput shaft 32, simultaneously in addition side be located in driven shaft 50 fixedly the drive belt 61 of 55 of cone-plate 541 and movable cone-plates also move closer to driven shaft 50 by position away from driven shaft 50, so can reach the self-shifting effect, centnifugal force is bigger when speed is faster, promptly can make 37 displacements of displacement steel ball the more, and the drive belt 61 that makes 38 of imput shaft 32 movable cone-plates 36 and power-transfer clutch adapter plates moves to the more position in the outside, make simultaneously driven shaft 50 fixedly the drive belt 61 of 55 of cone-plate 541 and movable cone-plates move to more inboard position (as shown in Figure 8), and can reach the self-shifting effect.

Again when the rider slows down bicycle speed, because each member rotating speed in the transmission system 30 is slack-off, thereby can make that centnifugal force weakens, thereby make displacement steel ball 37 to overcome the elastic force of pushing clamping spring 57 again and move gradually, drive belt 61 is moved according to aforementioned opposite direction, again when speed slows to a certain degree, steel ball 414 also can't overcome the elastic force of clutch spring 44 again, and can the struck side 412 of poke rod 41 be pushed back the position shown in Fig. 7 by power-transfer clutch portable plate 42, and clamping block 422 engagement groove 381 with on the power-transfer clutch adapter plate 38 once more on the power-transfer clutch portable plate 42 is fastened, and recover to drive the state that advances by driving chain 60.

As shown in Figure 9, the ratchet structure plan sketch of automatic speed changing labour-saving bicycle actuating device is provided for the utility model, basically this kind ratchet structure is a conventional device, it mainly is to remove 70 internal diameter and be provided with ratchet 71 taking off, and on the external diameter of interior ring (or axle) 80, be provided with short slot 81, in this short slot 81, be assembled with fastening tooth 83, remove 70 and 80 effects that reach unidirectional transmission of interior ring (or axle) and can make taking off by spring 82 ejections; It all is effects that unidirectional transmission is provided with identical ratchet structure with 32 of imput shaft,

axle sleeve

54 and 50 of driven shafts, driven

sprocket

58 and 50 of driven shafts that the drive sprocket 33 of automatic speed changing labour-saving bicycle actuating device is provided at the utility model.

Claims

1, a kind of bicycle driving device, this device is to be provided with transmission system between the driven gear of driven wheel that the bicycle pedal crank device drives and rear wheel-side, it is characterized in that: be provided with an imput shaft and a driven shaft in the shell of transmission system, imput shaft is pivoted with bearing and is assembled in the shell, on imput shaft, be provided with a keyway, an end that passes shell in imput shaft is installed with the drive sprocket that an inside is provided with ratchet, this drive sprocket is to be connected mutually with driven wheel by chain drive-belt, the sheathed axle sleeve that is assembled with on imput shaft, this axle sleeve inboard is provided with a keyway that matches with the imput shaft keyway, and can cooperate a key that the axle sleeve assembling is fixed on the imput shaft; Be installed with a fixing cone-plate at an end of aforementioned axle sleeve, and on axle sleeve, be arranged with a movable cone-plate, fixedly between cone-plate and movable cone-plate folder establish and be assembled with the displacement steel ball, end in addition at this axle sleeve is a thread end, then be one to be the binding end of dentation in the inboard of thread end, side in addition at movable cone-plate is a power-transfer clutch adapter plate, the central authorities of this power-transfer clutch adapter plate are a combined hole that matches with the axle sleeve binding end, be assembled on the thread end of axle sleeve by a nut ring, and the power-transfer clutch adapter plate fixedly is assembled on the binding end of axle sleeve, and folder is established drive belt between movable cone-plate and power-transfer clutch adapter plate, is provided with recessed engagement groove in power-transfer clutch adapter plate one side in addition; Periphery at the aforementioned clutch adapter plate fixedly is assembled with fixed mount, is provided with positioning plate in the outer end of fixed mount, and is provided with the pivoted hole of an assembling poke rod in the stage casing of fixed mount positioning plate side; Poke rod is a L-shaped body of rod, is provided with the Pivot that matches with the fixed mount pivoted hole in its bending place, and the two ends of poke rod are respectively struck side and assembling end, again on this assembling is held with the sheathed steel ball that is assembled with of little nut; Side in addition at the power-transfer clutch adapter plate then is a power-transfer clutch portable plate, in power-transfer clutch portable plate central authorities is a square hole, and be provided with the protrusion clamping block that matches with power-transfer clutch adapter plate engagement groove with respect to power-transfer clutch adapter plate side, this power-transfer clutch portable plate is to be sheathed on imput shaft with central square hole to hold institute's stack-mounted square shaft to put in addition, and an end of this square shaft cover is installed with the transmission head sprocket that is one, and between transmission head sprocket and power-transfer clutch portable plate, be folded with a clutch spring, outside transmission head sprocket and imput shaft, be folded with a packing ring simultaneously between side bearing; On driven shaft, be provided with the multiple tracks annular groove, and be provided with the oblique rail of protrusion in the axle sleeve stage casing, an end that passes shell at driven shaft is installed with a driven sprocket, this driven sprocket is to be connected mutually with driven gear with driven chain, the two ends of driven shaft are pivoted with bearing and are assembled on the shell, on driven shaft, cooperate C type ring and the sheathed axle sleeve that is assembled with of little bearing, end at axle sleeve is installed with fixedly cone-plate, and be equipped with ratchet in the inboard of end in addition at axle sleeve, its can with driven shaft on match by the fastening tooth of spring ejection, can make to be unidirectional gearing between axle sleeve and driven shaft; The sheathed movable cone-plate that is assembled with is provided with skewed slot in the sliding sleeve of movable cone-plate on axle sleeve, its assembling that matches with oblique rail on the axle sleeve, axle sleeve in addition end then be assembled with an adapter plate, between this adapter plate and movable cone-plate, be folded with a pushing clamping spring; Sheathedly on the driven shaft of axle sleeve side be assembled with a transmission from sprocket wheel, this transmission is assembled in driven shaft from sprocket wheel by two C type rings and is its location, be provided with ratchet in this transmission from the medium pore inboard of sprocket wheel, its can with driven shaft on match by the fastening tooth of spring ejection, can make transmission be unidirectional transmission between sprocket wheel and driven shaft.

2, bicycle driving device according to claim 1, it is characterized in that, wherein the pedal crank device is to be pivoted with axle drive shaft on the position of chassis mount pedal crank, be installed with driven wheel in axle drive shaft one side, simultaneously be set with ellipse respectively in the driven wheel both sides, fixedly be assembled with the crank cover at axle drive shaft two ends, the outside of ellipse, one end inboard of this crank cover is provided with the axis hole that cooperates with axle drive shaft, and be provided with fixing threaded hole and the combination screw that wears assembling bolt of rear end plate and assembling bolt in a side, in this crank cover, be assembled with an expansion link, one end of this expansion link is pivoted and is assembled with pedal, side at expansion link is provided with the fixing threaded hole that wears bolt of rear end plate simultaneously, this bolt of rear end plate can match with the bolt of rear end plate that crank puts, at crank cover and the inboard assembling of expansion link one spring, be provided with the chute of strip in addition in a side of expansion link, this chute can put institute's stack-mounted assembling bolt with crank and match, its length is used for limiting the flexible scope of expansion link at the crank cover, be provided with a roller shaft in the inboard of expansion link in addition, assemble the roller of a cooperation ellipse thereon.