CN108488362A

CN108488362A - Engine for motorcycle speed changer structure

Info

Publication number: CN108488362A
Application number: CN201810533368.2A
Authority: CN
Inventors: 张怡; 陈仁硕; 李庆; 徐桂林; 程志明
Original assignee: Lifan Industry Group Co Ltd
Current assignee: Lifan Technology Group Co Ltd
Priority date: 2018-05-29
Filing date: 2018-05-29
Publication date: 2018-09-04

Abstract

The invention discloses a kind of engine for motorcycle speed changer structures, including case of transmission, case of transmission is internally provided with transmission input shaft, transmission countershaft and transmission output shaft, it is additionally provided with gearshift between transmission input shaft, transmission countershaft and transmission output shaft and realizes gear, there are one extend the external output end of transmission case to transmission output shaft tool；It is characterized in that, it is additionally provided with hydraulic pressure power taking output device, hydraulic pressure power taking output device tool there are one for and the reducer input shaft power intake that either retarder jackshaft or reducer output shaft are sequentially connected, also there are one the power output ends for being exposed to reducer shell for tool.The advantages that present invention is with that can realize hydraulic device power output, to facilitate compartment unloading operation, improve motor tricycle the degree of automation, and variable-ratio regulation stall is more required with meeting many-sided operation, and practicability is more preferable.

Description

Engine for motorcycle speed changer structure

Technical field

The present invention relates to engine for motorcycle fields, in particular to a kind of engine for motorcycle speed changer knot Structure.

Background technology

Motor tricycle is the motorcycle gathered around there are three wheel, and vehicle is equipped with after general and is used for manned or loading.Therefore it is general When the engine design of motor tricycle, need to consider the gearshift for designing more gears to meet real requirement.

Existing a common engine for motorcycle, structure include the cylinder head dress positioned at upper end referring to Fig. 1 With combination 1, it is connected in the cylinder block assembly combination 2 of 1 lower section of cylinder head assembly combination；In cylinder inside cylinder block assembly combination It is provided with piston in combination 4, the piston-rod lower end in piston in combination 4 is connected on crank linkage 3, crank linkage or so It is respectively left crankcase assembly combination 7 and right crankcase assembly combination 8 outside both ends, 7 outside of left crankcase assembly combination is also set It is equipped with left crankcase cover assembly combination 5,8 outside of right crankcase assembly combination is provided with right crankcase cover assembly combination 6, left bent axle Magneto combination 9 is additionally provided in the left crankcase cover of case lid assembly combination 5,3 lower section of crank linkage is also parallel in an axial direction Spindle combinations 11 are provided with, are connected by 10 transmission of clutch main body combination between 11 right end of spindle combinations and crank linkage 3 It connects, 11 lower section of spindle combinations is arranged in parallel and is sequentially connected with countershaft combination 12 in an axial direction, and 12 lower section of countershaft combination is put down in an axial direction It goes and is sequentially connected with and start axis combination 13, spindle combinations 11, countershaft combination 12 and startup axis are equipped between combining 13 Gear, spindle combinations 11, countershaft combination 12 and startup axis combination 13 are realized by the gearshift that multistage power shift gear is constituted Outside left crankcase assembly combination 7 and right crankcase assembly combination 8 are each side set.

Above-mentioned existing engine for motorcycle is in use, the mixed gas of air and gasoline assembles combination in cylinder block In burn, push piston in combination that crank connecting link rotation is made to generate power, power passes to clutch master from crank linkage Body combines, and is mounted with that clutch main body combines in spindle combinations, therefore is combined by clutch main body drive spindle combinations rotation again again It is transmitted to countershaft combination, the external reverse gear of countershaft output end.

This existing engine for motorcycle, has the following defects：（1）When being installed due to engine for motorcycle It is to be transversely mounted along vehicle body, is limited by installation space so that engine size is limited, and each gear in transmission system cannot be set Meter, which too, such as gear crosses conference, to be caused spatial position insufficient and generates with other parts to interfere；But gear is too small then to have use The defects of service life and stability are relatively low, and required precision is higher.（2）Old-fashioned engine for motorcycle heat engine system and legacy system Share same set of chamber（Left and right crankcase）, use a set of lubricating system, the fine impurities that legacy system generates that cannot have The filtering of effect, easily makes heat engine system damage.（3）Old-fashioned engine for motorcycle main transformer is set with secondary speed change system for monoblock type Meter when installation, needs external reverse gear and transmission deviator, cannot achieve the installation site layout for comparing balance and influences whole Vehicle balances, and reduces vehicle form stability, is easy to overturn, safety coefficient is relatively low.Meanwhile external conventional reverse gear is easy damage Bad, service life is short.（4）The gear that variable-ratio is adjusted in old-fashioned engine for motorcycle speed change system is less, it is difficult to meet The growing performance requirement of motor tricycle.（5）Manpower unloading is continued to use in existing motor tricycle unloading, it has not been convenient to and at This height.

Invention content

In view of the above shortcomings of the prior art, the first technical problems to be solved of present invention institute are：How to provide one kind can Hydraulic device power output is realized, to facilitate the engine for motorcycle speed changer structure of compartment unloading operation.

In order to solve the above-mentioned technical problem, present invention employs the following technical solutions：

A kind of engine for motorcycle speed changer structure, including case of transmission, case of transmission are internally provided with speed changer Input shaft is also equipped with the transmission countershaft being arranged in parallel with transmission input shaft and speed changer output in transmission case body Axis is additionally provided with gearshift and realizes gear, becomes between transmission input shaft, transmission countershaft and transmission output shaft There are one extend the external output end of transmission case to fast device output shaft tool；It is characterized in that, being additionally provided with hydraulic pressure power taking output Device, there are one for either retarder jackshaft or retarder to export with reducer input shaft for hydraulic pressure power taking output device tool There are one the power output ends for being exposed to reducer shell for the power intake that axis is sequentially connected, also tool.

In this way, after increasing hydraulic pressure power taking output device, the external hydraulic system of the device can be relied on, and rely on liquid The overturning unloading for pressing telescoping cylinder control realization compartment improves motor tricycle the degree of automation and without individually increasing in addition Hydraulic power units saves cost.

As an optimization, the hydraulic pressure power taking output device and the setting of reducer output shaft spacing parallel arranging, hydraulic pressure power taking output There are one for the power taking driven gear with the gear engaged transmission on retarder jackshaft, hydraulic pressure for the power intake tool of device There are one connecting bushing, connecting bushing is rotatably arranged on case of transmission the power output end tool of power taking output device, Connecting bushing inner cavity is the connection chamber for power output and outer end is exposed to case of transmission and forms hydraulic device interface, It is sequentially connected between connecting bushing and power taking driven gear.

In this way, integral structure layout's more reasonable balance, power outputs and inputs more reliable and more stable.When it is implemented, Quickly gear engaged transmission on the power taking driven gear and retarder jackshaft of hydraulic pressure power taking output device.It in this way can be with It preferably improves hydraulic pressure power taking output device and exports rotating speed.Wherein connecting bushing inner cavity can be spline housing inner cavity or cross section For the inner cavity of polygon, it may be incorporated for connection and transmit torque.

As an optimization, break-make control mechanism is additionally provided in hydraulic pressure power taking output device, break-make control mechanism is for controlling Drive connection between connecting bushing and power taking driven gear is disconnected or is connected.

In this way, break-make control mechanism can directly be relied on to realize to the start-up and shut-down control of extraneous hydraulic system, it is easy to operate and Control is reliable.

Further, break-make control mechanism includes the first spline shaft structure for being set to power taking driven gear one end, is also wrapped The second spline shaft structure for being set to connecting bushing one end is included, further includes a spline housing, spline housing axially slidably coordinates On the first splined shaft or the second splined shaft, break-make control mechanism further includes a power taking shift fork connected with spline housing, is taken Power shift fork is fixed on one and is axially slidably mounted in the power taking shift fork axle in reducing gearbox body, power taking shift fork axle surface edge It is opened up there are one power taking control regulating tank perpendicular to axis direction, a root long item is equipped in power taking control regulating tank The power taking control adjusting block of shape, power taking control are located at adjusting block one end in the power taking control regulating tank, and the other end is solid It is scheduled on a power taking control adjustment axis inner end, power taking control is installed in rotation on case of transmission and is had with adjustment axis One is located at the external input terminal of transmission case, and power taking control tune is vertically and fixedly provided on the input terminal of power taking control adjustment axis Handle is saved, rotation power taking control regulation handle can control the axial movement of power taking shift fork axle by power taking control adjusting block, And then it controls spline housing movement and realizes connecting or disconnecting for the first splined shaft and the second splined shaft.

In this way, realizing break-make control using the structure, there is simple in structure, stable transmission, it is easy to control quick and sensitive The advantages that reliable.

Further, the break-make switching that two arcs are arranged at intervals in power taking shift fork axle keeps off groove surely, and two break-makes are cut It changes fixed gear groove and the first splined shaft and the second splined shaft is connected and disconnected from two stations and is correspondingly arranged, it is corresponding on case of transmission Surely there are one break-make switchings to keep off ball surely for the setting of gear groove for two break-make switchings, and gear ball is fixed away from break-make switching surely for break-make switching Gear groove direction is provided with break-make switching and keeps off spring surely, break-make switching surely gear spring act on break-make switching keep off surely ball and by its Corresponding break-make switching is connected to keep off in groove surely.

In this way, when break-make control mechanism works, by break-make switching, the realization of gear ball is accurately positioned two stations surely, It ensure that the break-make switching control of hydraulic pressure power taking output device is accurately reliable.

As an optimization, it is provided with and is used for and crankcase on the corresponding case of transmission of the power intake of transmission output shaft The ring flange of docking.

Transmission case body portion and crankcase are independently arranged in this way, can facilitate, to change shaft in speed changer Setting direction so that the total length of engine in one direction reduces, and is more favorable for engine installation and design.Specifically It says, structural improvement engine interior limited space so that the components such as gear and clutch are no longer limited by space, can be with Bigger is designed to improve stability and meet market demands, thus significantly reduce cost and extend service life. Meanwhile oil injecting lubricating structure can be separately provided in the lubrication system on case of transmission, save cost.

As an optimization, the gearshift, including multiple gear input gears for being set on transmission input shaft, are arranged Multiple gear intermediate gears on countershaft in the transmission, further include one and transmission countershaft shift fork axle disposed in parallel, Shift fork is axially displaceably arranged in shift fork axle, shift fork one end is connected with corresponding intermediate gear, and the other end is slidably fitted in In the spiral chute on one and transmission countershaft speed transmission drum surface disposed in parallel, speed transmission drum and gear change operation input driver Structure is connected, and speed transmission drum rotation can drive corresponding gear intermediate gear is axially mobile to realize shift speed change by shift fork；Speed change On device jackshaft positioned at the side of gear intermediate gear also successively fixing sleeve be equipped with quickly gear, reverse gear driving gear and slow Fast driving gear, quickly gear diameter be more than driving gear at a slow speed, quickly gear and an axially position and can Be set in rotating in a circumferential direction on transmission output shaft quick driven gear engagement, at a slow speed driving gear and an axially position and Be set in capable of rotating in a circumferential direction on transmission output shaft driven gear at a slow speed engagement, reverse gear driving gear and one setting exist The reverse idler gear of side engages；It is also set up between driven gear positioned at quick driven gear and at a slow speed on transmission output shaft There are one the driven gear that reverses gear, spline fitted between driven gear and transmission output shaft of reversing gear makes its circumferential direction limit but being capable of axis To sliding, reverse gear driven gear and quick driven gear and at a slow speed between driven gear, and respectively correspondence is set on opposite side wall Be equipped with the slotting pawl of pluggable cooperation and slotting claw slot, insert pawl and slotting claw slot it is mating after can realize torque transmit；Further include fast Slow gear switching mechanism, speed gear switching mechanism, which is connected with the driven gear that reverses gear and can stir the driven gear that reverses gear, to be axially moveable To fast block station, reverse gear station and slow block station；When the driven gear that reverses gear is located at fast block station, reverse gear driven gear With the mating transmission of quick driven gear；The driven gear that reverses gear be located at reverse gear station when, reverse gear driven gear can with reverse gear Intermediate gear engaged transmission；When the driven gear that reverses gear is located at slow block station, reverse gear driven gear and driven gear grafting at a slow speed Cooperation transmission.

In this way, in gearshift, on the basis of existing multistage shift speed governing, again increase one at a slow speed gear and One quick gear and a reverse gear, each gear may be implemented on the basis of existing each gear and quickly export, slowly Speed output and reversion output, therefore the type of exportable speed is greatly improved, improve the practicality of motor tricycle manipulation Property, while the switching of each gear being realized using the above structure, having simple in structure, gear switches reliable advantage.

Further, the speed gear switching mechanism includes a speed speed selector fork, and speed speed selector fork is fixed Be set on one and transmission output shaft speed quick change gear shaft disposed in parallel, speed speed selector fork output end and reverse gear from Moving gear is connected, and speed quick change gear shaft is axially slidably mounted on inside case of transmission, and speed quick change gear shaft surface is along vertical Directly opened up there are one fast slow-action section slot in axis direction, be equipped in fast slow-action section slot a root long bar shaped it is fast at a slow speed Adjusting block, fast slow-action locking nub one end are located in the fast slow-action section slot, and the other end is fixed in a fast slow-action nodal axisn End, fast slow-action nodal axisn are installed in rotation on case of transmission and are located at there are one tools the external input terminal of transmission case, It is vertically and fixedly provided with fast slow-action section handle on the input terminal of fast slow-action nodal axisn.

Fast slow-action section handle is rotated in this way, can be stirred speed quick change gear shaft by fast slow-action locking nub and be moved in an axial direction It is dynamic, and then control and reverse gear driven gear in fast block station, the switching reversed gear between station and slow block station.With structure letter It is single, it is conveniently operated, controls the advantages that reliable.

Further, fast block station is corresponded on speed quick change gear shaft, reverses gear station and slow block station is arranged at intervals with Three the fast of arc keep off at a slow speed groove surely, and three are corresponded on case of transmission, and there are one determine at a slow speed soon for the setting of gear groove surely at a slow speed soon Ball is kept off, gear groove direction is provided with and keeps off spring surely at a slow speed soon gear ball surely away from fast at a slow speed surely at a slow speed soon, keeps off bullet surely at a slow speed soon Spring is acted on to keep off ball surely at a slow speed soon and be connected to the fast of corresponding gear and be kept off in groove surely at a slow speed.

In this way, when gear shift operation, by gear ball is realized to fast block station, reverse gear station and slow block work surely at a slow speed soon Position is accurately positioned, it is ensured that gear shift operation positions, and shift is accurate reliable.

As an optimization, in gearshift further include the switching mechanism that reverses gear, the switching mechanism that reverses gear includes for installing The reverse idler gear axis of intermediate gear is kept off, reverse idler gear idle running is set on reverse idler gear axis；Reverse gear switching machine Structure further includes the switching shift fork that reverses gear of corresponding reverse idler gear setting, during switching shift fork fixation of reversing gear is set in one and reverses gear Between gear shaft it is disposed in parallel reverse gear switching shift fork axle on, reverse gear switching shift fork output end be connected with reverse idler gear, reverse gear Switch shift fork axle to be axially slidably mounted on inside case of transmission, switching shift fork axle surface of reversing gear is along perpendicular to axis direction It opens up there are one the switching regulating tank that reverses gear, the switching of reversing gear that a root long bar shaped is equipped in the switching regulating tank that reverses gear is adjusted Block, switching adjusting block one end of reversing gear are located at described reverse gear and switch in regulating tank, and the other end is fixed on a switching adjustment axis of reversing gear Inner end, switching adjustment axis of reversing gear are installed in rotation on case of transmission and are located at the external input of transmission case there are one tools It holds, switching regulation handle of reversing gear is vertically and fixedly provided on the input terminal for switching adjustment axis of reversing gear, switching regulation handle is reversed gear in rotation can Switch shift fork axle axial movement to reverse gear by switching adjusting block control of reversing gear, and then controls reverse idler gear in the station that reverses gear Switch between emptying station.

In this way, when without using gear reversing function, the switching mechanism that reverses gear can be relied on to be switched to reverse idler gear and put Idle station so that when speed gear switching mechanism switches between slow block station and fast block station, will not be reversed gear by centre The influence of station, can swimmingly realize switching between quickly and at a slow speed, need when avoiding switching at a slow speed soon by reversing gear and Cause output end to need to overcome the moment of inertia of reversion excessive and damage, ensures the reliable and stable of fast slow block handoff functionality.Meanwhile When needing using gear reversing function, speed gear switching mechanism is first switched to the station that reverses gear, then controls the switching mechanism that reverses gear again Also it is switched to the station that reverses gear simultaneously, easy to operate and switching of reversing gear is reliable and stable.

Further, corresponding emptying station and the station that reverses gear are arranged at intervals with falling for two arcs in switching shift fork axle of reversing gear Gear switching keeps off groove surely, and two switchings of reversing gear are corresponded on case of transmission, and there are one reverse gear to switch fixed gear rolling for the setting of gear groove surely Pearl, away from switching of reversing gear, gear groove direction is provided with switching of reversing gear and keeps off spring surely gear ball surely surely for switching of reversing gear, and switching of reversing gear is fixed Gear spring, which acts on switching of reversing gear and keeps off ball surely and be connected to reversing gear for corresponding gear, to be switched in gear groove surely.

In this way, when gear shift operation, emptying station and the accurate of the station that reverses gear are determined by reversing gear to switch to keep off ball surely and realize Gear shift operation positioning is realized in position, ensure that shift is accurate reliable.

As an optimization, gear input gear includes being sequentially sleeved at transmission input shaft from the input terminal of transmission input shaft On one gear input gear, four gear input gears, three gear input gears, five gear input gears and two gear input gears, one gear it is defeated Enter gear diameter less than two gear input gears be less than three gear input gears be less than four gear input gears be less than five gear input gears； Wherein one gear input gear is fixed on transmission input shaft and two gear input gear spline fitteds are mounted on transmission input shaft, Four gear input gears and five gear input gears are axially limited and are mounted on transmission input shaft with can circumferentially rotating, three gear inputs Gear is circumferentially limited by spline and is axially slidably mounted on transmission input shaft, three gear input gears and four gear inputs Being provided between the adjacent side wall of gear can be mutually inserted to transmit the concave-convex fit structure of torque, three gear input gears and five Being provided between the adjacent side wall of gear input gear can be mutually inserted to transmit the concave-convex fit structure of torque；

Gear intermediate gear includes pass through on the transmission countershaft gear intermediate gear being arranged successively, four Keep off intermediate gear, three gear intermediate gears, five gear intermediate gears and two gear intermediate gears；Wherein one gear intermediate gear axially limit and It is mounted on can circumferentially rotating on transmission countershaft and is intermeshed with a gear input gear, the four gears intermediate gear relies on Spline is circumferentially limited and can be axially and slidably installed on countershaft in the transmission, four gear intermediate gears and a gear intermediate gear phase Being provided between adjacent side wall can be mutually inserted to transmit the concave-convex fit structure of torque, and four gear intermediate gears and three gears are intermediate Being provided between the adjacent side wall of gear can be mutually inserted to transmit the concave-convex fit structure of torque, and four gear intermediate gears are circumferential Side and four gear input gears engagements, the circumferential other side and one be mounted on one/tri- gear switching shift fork phase in shift fork axle Even, one/tri- gear switching shift fork can control four gear intermediate gears and be axially moveable and match respectively with a gear intermediate gear grafting It closes and four gear input gears is engaged and kept off in the mating three kinds of states of intermediate gear with three and switched, the three gears center tooth It takes turns axial limiting and is mounted on can circumferentially rotating on transmission countershaft and is engaged with three gear input gears；Five gear is intermediate Gear is circumferentially limited by spline and can be axially and slidably installed on countershaft in the transmission, and the one of five gear intermediate gears circumferential directions Side and five gear input gear engagements, the other side of five gear intermediate gear circumferential directions and the one two gear shift fork phase in shift fork axle Connect, the two gears intermediate gear axially limits and is mounted on can circumferentially rotating on transmission countershaft and keeps off input gears with two Engagement, being provided between five gear intermediate gears and the two adjacent side walls of gear intermediate gears can be mutually inserted to transmit the recessed of torque Convex fit structure, two gear shift forks can control five gear intermediate gears be axially moveable and with five gear input gears engagement and and Switch between two gear intermediate gears are mating；

In shift fork axle be located at one/tri- gear switch shift fork and two gear shift forks between also set up there are one four/five gear switch shift forks, four/ Five gear switching shift forks and three gear input gears are connected, and energy is provided between three gear input gears and four gear input gear adjacent walls It is enough mutually inserted to transmit the concave-convex fit structure of torque, is arranged between three gear input gears and five gear input gear adjacent walls Having can be mutually inserted to transmit the concave-convex fit structure of torque, and four/five gear switching shift forks can control three gear input gear edges It slides axially and is keeping off mating input gears and three gear intermediate gears engagements with four respectively and inserted with five gear input gears It connects in three kinds of states of cooperation and switches.

In this way, being integrated with five for the basic gear of switching, in conjunction with fast block and at a slow speed using the clever structure Gear and reversion gear can obtain altogether 15 kinds of speed outputs, greatly improve speed output class, greatly improve and rub Motorcycle practicability.

When it is implemented, gear change operation input driver structure include one and speed transmission drum secondary tooth disposed in parallel become gear shaft with And one and the vertically disposed main tooth change gear shaft of secondary tooth change gear shaft, secondary tooth becomes gear shaft and speed transmission drum is sequentially connected, the pair tooth change Gear shaft and main tooth become gear shaft by a pair of of Helical gear Transmission engaged transmission.In this way, thus it is possible to vary the direction of torque transmission facilitates change Keep off the access of operation input.

In conclusion the present invention, which has, can realize hydraulic device power output, to facilitate compartment unloading operation, improve Motor tricycle the degree of automation, and variable-ratio regulation stall is more required with meeting many-sided operation, it is excellent that practicability is more preferable etc. Point.

Description of the drawings

Fig. 1 is the structural schematic diagram of existing a common engine for motorcycle.

Fig. 2 is the overall structure diagram of the engine for motorcycle of optimal embodiment.

It can show that machine oil pump chamber, water pump install the partial structurtes of chamber and built-in filter in the engine that Fig. 3 is Fig. 2 Sectional view.

The sectional view of case of transmission and its internal structure from another angle in the engine that Fig. 4 is Fig. 2.

Fig. 5 is the partial structural diagram for individually showing the switching mechanism that reverses gear.

Fig. 6 is the partial structural diagram for individually showing the break-make control mechanism in hydraulic pressure power taking output device.

Fig. 7 is that can show that rotation is reversed gear outside case of transmission to switch the office of regulation handle and fast slow-action section handle Portion's structural schematic diagram.

Specific implementation mode

Below in optimal embodiment, in conjunction with a kind of engine for motorcycle and its attached drawing using structure of the invention The present invention is described in further detail.

Optimal embodiment：As illustrated in figs. 2-7, a kind of engine for motorcycle using structure of the invention, is shown in figure 2, include the cylinder head assembly combination 1 positioned at upper end, is connected in the cylinder block assembly combination 2 of 1 lower section of cylinder head assembly combination；Gas It is provided with piston in combination 4 in cylinder inside cylinder body assembly combination, the piston-rod lower end in piston in combination 4 is connected to crank connecting link In combination 3, it is separately mounted to outside crank linkage left and right ends on left crankcase 7 and right crankcase 8, outside left crankcase 7 Also covering is equipped with left crankcase cover 5, is also covered outside right crankcase 8 and is equipped with right crankcase cover 6, left crankcase and right crankcase Docking, which is connected, constitutes crankcase, and left crankcase cover is connected with right crankcase cover docking constitutes crankcase cover, position in left crankcase cover 5 It is additionally provided with magneto combination 9 in an end position of crank, 3 lower section of crank linkage is also arranged in parallel with main shaft in an axial direction 12, it is sequentially connected by clutch main body combination 10 between main shaft right end and crank；Wherein, see Fig. 4, further include one and main shaft 12 vertically disposed transmission input shafts 14,14 one end of transmission input shaft and main shaft pass through a pair of intermeshing conical gear It is sequentially connected, it is in an angle that crank axle axial line intersects with plane and transmission input shaft where spindle axis line；Speed changer is defeated Enter axis 14 in a case of transmission 19, phase is docked by a pair of of ring flange 20 between case of transmission 19 and crankcase Even, ring flange axial line and transmission input shaft axis parallel are arranged, and are also equipped in case of transmission 19 defeated with speed changer Enter the transmission countershaft 15 and transmission output shaft 16 of the parallel arrangement of axis 14, transmission input shaft 14, transmission countershaft It is additionally provided with gearshift between 15 and transmission output shaft 16 and realizes gear, there are one extend transmission output shaft tool The external output end of transmission case.

In this way, in the engine, one will be provided separately within together with the part of cylinder head, crank connecting link and main shaft in engine In a shell, transmission portion is provided separately in another shell and is docked using ring flange, then speed changer is inputted Axis axial line and crank axle axial line intersect with plane where spindle axis line to be arranged at an angle.Thus change change The setting direction of shaft in fast device so that engine total length in one direction reduces, be more favorable for engine installation and Design.Specifically, structural improvement engine interior limited space so that the components such as gear and clutch are no longer by sky Between limit, bigger can be designed to improve stability and meet market demands, thus significantly reduce cost and extend Service life.Meanwhile transmission portion be separately provided shell and it is diagonally disposed after, transmission portion no longer with crank connecting link portion Divide and share a chamber, therefore the internal chamber temperature of transmission portion can be greatly reduced, and no longer need to be arranged to transmission portion Circulating water cooling system, simpler lubrication system can also be separately provided to transmission portion, reduce production requirement, drop Low cost.

Wherein, this includes a main shaft drive bevel gear 17 being fixed on main shaft to intermeshing conical gear The input shaft driven wheel of differential 18 being fixed on input shaft connector sleeve 13 with one, input shaft connector sleeve 13 are installed in rotation on In crankcase, for 13 end of input shaft connector sleeve tool there are one the input axial interface being exposed in the middle part of the ring flange of crankcase, this is defeated Enter axial interface for and transmission input shaft 14 be fixedly and coaxially connected.In this way, can be with more convenient crankcase and case of transmission Separation and meanwhile facilitate the power of transmission input shaft to access.

Wherein, independent crankcase cooling system and crankcase lubrication system, the change are provided in the crankcase cover It is provided with speed changer lubrication system on fast device shell.Specifically, speed changer lubrication system can include being arranged in speed changer The pouring orifice of housing outer surface, pouring orifice are connected to each gear engagement position inside case of transmission by oiling channel；In this way Transmission portion directly uses oil injecting lubricating, simple in structure, and lubrication is convenient and has been greatly saved cost.

Being completely separated for machine oil and gear oil can be reached in this way, effective protection heat engine system precision parts improve each The service life of parts reduces failure rate, reinforces reliability.

Wherein, see that Fig. 3, the crankcase lubrication system include a machine oil pump chamber being arranged on right crankcase 21, rotor of engine oil pump is provided in machine oil pump chamber 21, and rotor of engine oil pump is fixed on a machine oil pump shaft 24,24 He of machine oil pump shaft Crank shaft core line is arranged in parallel, and lubricating oil pump driven gear is equipped on machine oil pump shaft input terminal, and lubricating oil pump driven gear passes through one The lubricating oil pump carrier gear 22 of a setting and the engaged transmission of driving gear 23 mounted on crank end, machine oil pump chamber and setting exist Lubricating pipe in crankcase and crankcase cover communicates composition circulating oil system.

In this way, the power using a carrier gear by the driving gear on crank as lubricating oil pump inputs, there is knot The features such as structure is simple, and power is reliable, pump oil high lubricating effect.

Wherein, it is also set up in crankcase circulating oil system there are one built-in filter 11, the built-in filter has One filter right cover for being installed in rotation on 6 inner wall of right crankcase cover and a filter for being fixedly mounted on crank end Left cover, it is fixed between filter left cover and filter right cover to dock and constitute filter chamber in it and realize centrifugal mistake Filter, the center of rotation line position of the filter right cover of strainer right end and the lubricating pipe face phase in right crankcase cover It connects, the filter left cover of strainer left end and the grease channel being arranged on crank shaft core line are connected.

In this way, the filtering to lubricating oil can be better achieved by built-in filter, while filter self structure has There is dismounting easy to clean, preferably lubricating oil can be helped to be circulated in lubricating system, improve the lubrication of lubricating oil And heat dissipation effect.

Wherein, to include one be formed in the water pump installation chamber 26 that right crankcase covers, water with crankcase cooling system Horizontally disposed pump shaft 25 is installed in pump installation chamber 26, water pump vane, pump shaft 25 and machine oil are provided on pump shaft Pump shaft 24 is sequentially connected, and water pump installs chamber 26 and needs to cool down in in-engine cooling-water duct and engine interior by being arranged Position is connected, and need to cool down position and be primarily referred to as cylinder block and cylinder head.

In this way, driving the cooling of cooling water circulation flowing realization engine by above-mentioned water pump component structure.It relies on simultaneously One power output drives oil pump and pump working simultaneously, has many advantages, such as simple in structure, reliable transmission.

Wherein, water pump installation chamber is formed in the water pump installation lid 27 and right crankcase being fixed on outside right crankcase cover Between lid 6.Dismounting maintenance more convenient in this way.

Wherein, the gearshift is shown in Fig. 4-7, including the multiple gears input tooth being set on transmission input shaft 14 Wheel, the multiple gear intermediate gears being set on transmission countershaft 15 further include one and parallel with transmission countershaft 15 set The shift fork axle 28 set axially displaceably is arranged with shift fork in shift fork axle 28, and shift fork one end is connected with corresponding intermediate gear, separately One end is slidably fitted in the spiral chute on one and transmission countershaft 29 surface of speed transmission drum disposed in parallel, 29 He of speed transmission drum Gear change operation input driver structure is connected, and the rotation of speed transmission drum 29 can drive corresponding gear intermediate gear axially to move by shift fork It is dynamic to realize shift speed change；Positioned at the side of gear intermediate gear, also fixing sleeve is equipped with quickly successively on transmission countershaft 15 Gear 30, reverse gear driving gear 31 and driving gear 32 at a slow speed, quickly 30 diameter of gear taken turns more than driving tooth 32 at a slow speed, soon Fast driving gear 30 and an axially position and it is set in the quick driven tooth on transmission output shaft 16 with capable of rotating in a circumferential direction 33 engagement of wheel, driving gear 32 and an axially position and is set on transmission output shaft 16 at a slow speed in which can rotate in a circumferential direction Driven gear 34 engages at a slow speed, reverse gear driving gear 31 and an engagement of reverse idler gear 35 being arranged in side；Speed changer It is located at quick driven gear 33 on output shaft 16 and also sets up that there are one the driven gears 36 that reverses gear between driven gear 34 at a slow speed, Spline fitted makes it circumferentially limit but can slide axially between gear driven gear 36 and transmission output shaft 16, driven tooth of reversing gear Wheel 36 and quickly driven gear 33 and at a slow speed between driven gear 34, are respectively correspondingly arranged on pluggable match on opposite side wall Close slotting pawl and slotting claw slot, insert pawl and slotting claw slot it is mating after can realize torque transmit；Further include speed gear switching mechanism, Speed gear switching mechanism, which is connected with the driven gear 36 that reverses gear and can stir the driven gear that reverses gear, to be axially moveable to fast block work Position, reverse gear station and slow block station；When the driven gear that reverses gear is located at fast block station, reverse gear driven gear 36 and quickly from 33 mating transmission of moving gear；The driven gear that reverses gear be located at reverse gear station when, the driven gear 36 that reverses gear can be with centre of reversing gear 35 engaged transmission of gear；When the driven gear that reverses gear is located at slow block station, reverse gear driven gear 36 and at a slow speed driven gear 34 insert Connect cooperation transmission.

Wherein, the speed gear switching mechanism includes a speed speed selector fork 37, and speed speed selector fork 37 is fixed Be set on one and 16 speed quick change gear shaft 38 disposed in parallel of transmission output shaft, 37 output end of speed speed selector fork and The driven gear 36 that reverses gear is connected, and speed quick change gear shaft 38 is axially slidably mounted on inside case of transmission 19, speed quick change Gear shaft surface is opened up along perpendicular to axis direction there are one fast slow-action section slot, and a root long is equipped in fast slow-action section slot The fast slow-action locking nub 39 of bar shaped, fast 39 one end of slow-action locking nub are located in the fast slow-action section slot, and the other end is fixed on one A fast 40 inner end of slow-action nodal axisn, fast slow-action nodal axisn 40 are installed in rotation on case of transmission 19 and have there are one being located at The external input terminal of transmission case is vertically and fixedly provided with fast slow-action section handle 41 on the input terminal of fast slow-action nodal axisn.

Wherein, fast block station is corresponded on speed quick change gear shaft, reverses gear station and slow block station is arranged at intervals with three The fast of arc keeps off at a slow speed groove 42 surely, and three are corresponded on case of transmission, and there are one keep off at a slow speed the setting of gear groove surely soon surely at a slow speed soon Ball 43, soon at a slow speed surely gear ball away from it is fast at a slow speed surely gear groove direction be provided with it is fast keep off spring 44 surely at a slow speed, keep off surely at a slow speed soon Spring 44 is acted on to keep off ball 43 surely at a slow speed soon and be connected to the fast of corresponding gear and be kept off in groove 42 surely at a slow speed.

Wherein, in gearshift further include the switching mechanism that reverses gear, the switching mechanism that reverses gear includes in reversing gear for installation Between gear reverse idler gear axis 35, reverse idler gear 35 idle running be set on reverse idler gear axis 45；It reverses gear switching Mechanism further includes the switching shift fork 46 that reverses gear of corresponding reverse idler gear setting, the switching fixation of shift fork 46 of reversing gear be set in one and Reverse idler gear axis is disposed in parallel to reverse gear in switching shift fork axle 47, and reverse gear switching 46 output end of shift fork and reverse idler gear 35 are connected, and switching shift fork axle 47 of reversing gear axially slidably is mounted on inside case of transmission 19, and reverse gear switching 47 table of shift fork axle Face is opened up along perpendicular to axis direction there are one the switching regulating tank that reverses gear, and a root long item is equipped in the switching regulating tank that reverses gear The switching adjusting block 48 that reverses gear of shape, 48 one end of switching adjusting block of reversing gear are located at described reverse gear and switch in regulating tank, and the other end is fixed 49 inner end of switching adjustment axis of reversing gear at one, switching adjustment axis 49 of reversing gear are installed in rotation on case of transmission 19 and have One is located at the external input terminal of transmission case, and switching of reversing gear is vertically and fixedly provided on the input terminal for switching adjustment axis 49 of reversing gear and is adjusted Handle 50, rotation reverse gear switching regulation handle can by reverse gear switching adjusting block control reverse gear switching shift fork axle axial movement, And then control reverse idler gear reverse gear station and emptying station between switch.

Wherein, corresponding emptying station and the station that reverses gear are arranged at intervals with reversing gear for two arcs in switching shift fork axle 47 of reversing gear Switching keeps off groove 51 surely, and two switchings of reversing gear are corresponded on case of transmission, and there are one reverse gear to switch fixed gear rolling for the setting of gear groove 51 surely Pearl 52, switching of reversing gear keeps off ball 52 surely, and away from switching of reversing gear, gear groove direction is provided with the switching gear spring 53 surely that reverses gear surely, reverses gear Switching surely gear spring 53 act on reverse gear switching surely keep off ball 52 and be connected to corresponding gear reverse gear switching keep off groove surely In 51.

Wherein, it is additionally provided with hydraulic pressure power taking output device, there are one for defeated with retarder for hydraulic pressure power taking output device tool Enter the axis power intake that either retarder jackshaft or reducer output shaft are sequentially connected, also there are one be exposed to deceleration to tool The power output end of device shell.

Wherein, the hydraulic pressure power taking output device and the setting of reducer output shaft spacing parallel arranging, hydraulic pressure power taking output device Power intake tool there are one for and retarder jackshaft on gear engaged transmission power taking driven gear 54, hydraulic pressure takes For the power output end tool of power output device there are one connecting bushing 55, connecting bushing 55 is rotatably arranged in case of transmission 19 On, connecting bushing inner cavity is the connection chamber for power output and outer end is exposed to case of transmission and forms hydraulic device and connects Mouth 56, is sequentially connected between connecting bushing 55 and power taking driven gear 54.

Wherein, break-make control mechanism is additionally provided in hydraulic pressure power taking output device, break-make control mechanism is connected for controlling Drive connection between axle sleeve and power taking driven gear is disconnected or is connected.

Wherein, break-make control mechanism includes the first spline shaft structure for being set to 54 one end of power taking driven gear, further includes It is set to second spline shaft structure of 55 one end of connecting bushing, further includes a spline housing 57, spline housing 57 is axially slidably On the first splined shaft or the second splined shaft, break-make control mechanism further includes the power taking group of one and the connection of spline housing 57 for cooperation Fork 58, power taking shift fork 58 are fixed on one and are axially slidably mounted in the power taking shift fork axle 59 in reducer shell 19, take 59 surface of power shift fork axle is opened up along perpendicular to axis direction there are one power taking control regulating tank, is matched in power taking control regulating tank The power taking control adjusting block 60 for being provided with a root long bar shaped is closed, power taking control 60 one end of adjusting block is located at power taking control With in regulating tank, the other end is fixed on 61 inner end of power taking control adjustment axis, and power taking control uses adjustment axis 61 rotationally It is located at the external input terminal of transmission case, the input terminal of power taking control adjustment axis on case of transmission and there are one tools On be vertically and fixedly provided with power taking control regulation handle 62, rotation power taking control regulation handle can be adjusted by power taking control Block controls the axial movement of power taking shift fork axle, so control spline housing movement realize the first splined shaft and the second splined shaft connection or It disconnects.

Wherein, the break-make switching that two arcs are arranged at intervals in power taking shift fork axle 59 keeps off groove 63 surely, and two break-makes are cut It changes fixed gear groove 63 and the first splined shaft and the second splined shaft is connected and disconnected from two stations and is correspondingly arranged, it is right on case of transmission Answering the switching of two break-makes, the setting of gear groove 63 keeps off ball 64 surely there are one break-make switching surely, break-make switching surely gear ball 64 away from logical Surely gear groove direction is provided with break-make switching and keeps off spring 65 surely for disconnected switching, and to act on break-make switching fixed for gear spring 65 surely for break-make switching It keeps off ball 64 and is connected to corresponding break-make switching and keep off in groove 63 surely.

Wherein, gear input gear includes being sequentially sleeved on transmission input shaft 14 from the input terminal of transmission input shaft One gear input gear 71, four keep off input gear 74, three keep off input gear 73, five keep off input gear 75 and two keep off input gear 72, one gear 71 diameter of input gear be less than two gear input gears 72 be less than three gear input gears 73 be less than four gear input gears 74 it is small Input gear 75 is kept off in five；Wherein one gear input gear 71 is fixed on transmission input shaft 14 and two and keeps off 72 spline of input gear It is fitted on transmission input shaft 14, four gear input gears 74 and five keep off 75 axial limiting of input gear and can circumferentially rotate Ground is mounted on transmission input shaft, and three gear input gears 73 circumferentially limit by spline and are axially slidably mounted on speed change On device input shaft, being provided between the adjacent side wall of the three gear gear input gears 74 of input gears 73 and four can be mutually inserted to pass The concave-convex fit structure of torque is passed, being provided between the adjacent side wall of the three gear gear input gears 75 of input gears 73 and five being capable of phase Mutual grafting is to transmit the concave-convex fit structure of torque；

Gear intermediate gear includes the gear intermediate gear being arranged successively that passes through on the transmission countershaft 15 81, four gear intermediate gears 84, three keep off intermediate gear 83, five and keep off the gear intermediate gear 82 of intermediate gear 85 and two；Wherein one gear is intermediate 81 axial limiting of gear and can circumferentially rotate be mounted on transmission countershaft on and with one gear input gear 71 be intermeshed, institute It states four gear intermediate gears 84 circumferentially to limit and can be axially and slidably installed on countershaft in the transmission by spline, four gears are intermediate Being provided between the adjacent side wall of the gear intermediate gear 81 of gear 84 and one can be mutually inserted to transmit the male-female engagement knot of torque Structure, four gear intermediate gears 84 and three keep off between the adjacent side wall of intermediate gears 83 being provided with and can be mutually inserted to transmit torque Concave-convex fit structure, the circumferential side of four gear intermediate gears 84 and four gear input gears 74 engage, the circumferential other side and one One/tri- gear switching shift fork 76 in shift fork axle is connected, and one/tri- gear switching shift fork 76 can control four gear intermediate gears 84 Be axially moveable and respectively with one gear intermediate gear 81 it is mating and four gear input gears 74 engagement and with three gear among Switch in 83 mating three kinds of states of gear, described three keep off 83 axial limiting of intermediate gear and are mounted on change with can circumferentially rotating It is engaged on fast device jackshaft and with three gear input gears 73；The five gear intermediate gear 85 circumferentially limits by spline and being capable of axis To being slidably mounted on transmission countershaft, five gear intermediate gears, 85 circumferential side and five gear input gears 75 engage, and five The 85 circumferential other side of gear intermediate gear is connected with the one two gear shift fork 77 in shift fork axle, the two gears intermediate gear 82 axial limitings and can circumferentially rotate be mounted on transmission countershaft on and with two gear input gears 72 engage, five gear center tooths Being provided between wheel 85 and the two adjacent side walls of gear intermediate gears 82 can be mutually inserted to transmit the concave-convex fit structure of torque, Two gear shift forks 77 can control five gear intermediate gears 85 and be axially moveable and be kept off with five gear input gear 75 engagements and with two Switch between intermediate gear 82 is mating；

In shift fork axle be located at one/tri- gear switch shift fork 76 and two keep off shift fork 77 between also set up there are one four/five gear switch shift forks 78, four/five gear switching shift forks 78 are connected with three gear input gears 73, and three gear input gears 73 and four keep off 74 sides adjacent of input gear Being provided between wall can be mutually inserted to transmit the concave-convex fit structure of torque, and three gear input gears 73 and five keep off input gear Being provided between 75 adjacent walls can be mutually inserted to transmit the concave-convex fit structure of torque, four/five gear switching 78 energy of shift fork Enough control three gear input gears 73 slide axially and respectively with four gear input gears 74 it is mating and three gear intermediate gears 83 engagement and with five gear 75 mating three kinds of states of input gear in switch.

When it is implemented, gear change operation input driver structure, which includes one and the secondary tooth disposed in parallel of speed transmission drum 29, becomes gear shaft 79 and one and secondary tooth become the vertically disposed main tooth of gear shaft 79 and become gear shaft 80, secondary tooth becomes gear shaft 79 and speed transmission drum is sequentially connected, The pair tooth becomes gear shaft 79 and main tooth becomes gear shaft 80 by a pair of of Helical gear Transmission engaged transmission.In this way, thus it is possible to vary torque passes Dynamic direction, the access for facilitating gear change operation to input.

Above-mentioned engine has the following advantages

（1）New engine for motorcycle uses individual gearbox, gearbox to change the direction with transmission of crankshaft, is formed The angle in one space, reduces limitation of the body width to size of engine so that transmission components have the only of bigger Vertical space layout can design the specification of each gear according to practical situation, and preferably to meet market demands, extension makes With the service life and improve stability.

（2）New engine for motorcycle transmission shift system is partially separated with engine heat engine, respectively uses oneself Lubricating system, reach being completely separated for machine oil and gear oil, effective protection heat engine system precision parts improve each parts Service life, reduce failure rate, reinforce reliability.

（3）New engine for motorcycle main transformer speed is integrated with secondary speed change system and structure of reversing gear, and changes The structure of the additional reverse gear of traditional engine and transmission deviator, not only efficiently solves what conventional reverse gear was easily damaged Problem extends service life.Motor tricycle development cost can be reduced again up to 10%.Meanwhile power is realized in engine Deflecting, engine power set output in being, be more prone to dock with axletree, and make complete machine layout more balanced, improve vehicle Stability, is not easy to overturn, safety coefficient higher.

（4）New engine for motorcycle slewing range is wide, highly practical, and keep off and reverse gear provided with speed totally 15 gears Position is corresponding with the three kinds of speed outputs of output that quickly export, export at a slow speed and reverse gear equal to each of five speed change gears, therefore can Meet the gear requirement under each use condition, practicability is more preferable.

（5）It is provided with hydraulic device interface in new engine for motorcycle, can directly export be connected by power to liquid Pressure device realizes the automatic unloading in compartment by control hydraulic device, keeps its unloading more convenient, save human cost, carry High practicability.

Claims

1. a kind of engine for motorcycle speed changer structure, including case of transmission, case of transmission are internally provided with speed change Device input shaft is also equipped with the transmission countershaft being arranged in parallel with transmission input shaft in transmission case body and speed changer is defeated Shaft is additionally provided with gearshift and realizes gear between transmission input shaft, transmission countershaft and transmission output shaft, There are one extend the external output end of transmission case to transmission output shaft tool；It is characterized in that, it is defeated to be additionally provided with hydraulic pressure power taking Go out device, there are one for either retarder jackshaft or retarder to be defeated with reducer input shaft for hydraulic pressure power taking output device tool There are one the power output ends for being exposed to reducer shell for the power intake that shaft is sequentially connected, also tool.

2. engine for motorcycle speed changer structure as described in claim 1, which is characterized in that the hydraulic pressure power taking output Device and the setting of reducer output shaft spacing parallel arranging, there are one be used for and slow down the power intake tool of hydraulic pressure power taking output device The power taking driven gear of gear engaged transmission on device jackshaft, there are one connect the power output end tool of hydraulic pressure power taking output device Spindle set, connecting bushing are rotatably arranged on case of transmission, and connecting bushing inner cavity is the connecting cavity for power output Room and outer end are exposed to case of transmission and form hydraulic device interface, the company of transmission between connecting bushing and power taking driven gear It connects.

3. engine for motorcycle speed changer structure as claimed in claim 2, which is characterized in that connecting bushing inner cavity is colored Key covers inner cavity.

4. engine for motorcycle speed changer structure as claimed in claim 2, which is characterized in that hydraulic pressure power taking output device In be additionally provided with break-make control mechanism, the transmission that break-make control mechanism is used to control between connecting bushing and power taking driven gear connects Connect disconnection or connection.

5. engine for motorcycle speed changer structure as claimed in claim 4, which is characterized in that break-make control mechanism includes It is set to first spline shaft structure of power taking driven gear one end, further includes the second splined shaft knot for being set to connecting bushing one end Structure further includes a spline housing, and spline housing axially slidably coordinates on the first splined shaft or the second splined shaft, break-make control Mechanism processed further includes a power taking shift fork connected with spline housing, and power taking shift fork, which is fixed on one and is axially slidably mounted on, to be subtracted In power taking shift fork axle in fast device shell, along being opened up perpendicular to axis direction, there are one power taking controls to adjust on power taking shift fork axle surface Slot is saved, the power taking control adjusting block of a root long bar shaped is equipped in power taking control regulating tank, power taking control is adjusted Block one end is located in the power taking control regulating tank, and the other end is fixed on a power taking control adjustment axis inner end, power taking control System is installed in rotation on case of transmission with adjustment axis and is located at the external input terminal of transmission case, power taking control there are one tools Power taking control regulation handle is vertically and fixedly provided on the input terminal of system adjustment axis, rotation power taking control regulation handle can lead to The control power taking shift fork axle axial movement of power taking control adjusting block is crossed, and then controls spline housing movement and realizes the first splined shaft and the Two splined shafts connect or disconnect.

6. engine for motorcycle speed changer structure as claimed in claim 5, which is characterized in that in the power taking shift fork axle The break-make switching for being arranged at intervals with two arcs keeps off groove surely, and two break-make switchings keep off groove and the first splined shaft and the second flower surely Two stations of key axis connection and disconnection are correspondingly arranged, and corresponding two break-makes switch there are one gear groove settings surely on case of transmission Break-make switching keeps off ball surely, and gear ball away from break-make switches gear groove direction surely and is provided with break-make switching and keeps off bullet surely surely for break-make switching Spring, gear spring acts on break-make switching and keeps off ball surely and be connected to the switching of corresponding break-make and keeps off groove surely surely for break-make switching It is interior.

7. engine for motorcycle speed changer structure as described in claim 1, which is characterized in that transmission output shaft moves The ring flange for being docked with crankcase is provided on the corresponding case of transmission of power input terminal.

8. engine for motorcycle speed changer structure as claimed in claim 7, which is characterized in that the gearshift, packet The multiple gear input gears being set on transmission input shaft are included, the multiple gear center tooths being set on transmission countershaft Wheel, further includes one and transmission countershaft shift fork axle disposed in parallel, shift fork is axially displaceably arranged in shift fork axle, is dialled Fork one end is connected with corresponding intermediate gear, and the other end is slidably fitted in one and transmission countershaft speed transmission drum disposed in parallel In the spiral chute on surface, speed transmission drum is connected with gear change operation input driver structure, and speed transmission drum rotation can be driven by shift fork Corresponding gear intermediate gear is axially mobile to realize shift speed change；On transmission countershaft also positioned at the side of gear intermediate gear Successively fixing sleeve be equipped with quickly gear, reverse gear driving gear and driving gear at a slow speed, quickly gear diameter is more than slow Fast driving gear quickly gear and an axially position and is set in fast on transmission output shaft in which can rotate in a circumferential direction The engagement of fast driven gear driving gear and an axially position and is set on transmission output shaft at a slow speed in which can rotate in a circumferential direction The engagement of driven gear at a slow speed, reverse gear driving gear and a reverse idler gear engagement being arranged in side；Speed changer exports Be located at quick driven gear on axis and also set up between driven gear at a slow speed there are one the driven gear that reverses gear, reverse gear driven gear and Spline fitted makes it circumferentially limit but can slide axially between transmission output shaft, and reverse gear driven gear and quick driven gear And at a slow speed between driven gear, it respectively is correspondingly arranged on the slotting pawl of pluggable cooperation and slotting claw slot on opposite side wall, inserts pawl With slotting claw slot it is mating after can realize torque transmit；Further include speed gear switching mechanism, speed keeps off switching mechanism and reverses gear Driven gear, which is connected and can stir the driven gear that reverses gear, to be axially moveable to fast block station, reverse gear station and slow block work Position；When the driven gear that reverses gear is located at fast block station, reverse gear driven gear and the mating transmission of quick driven gear；Reverse gear from Moving gear be located at reverse gear station when, reverse gear driven gear can with reverse idler gear engaged transmission；The driven gear that reverses gear is located at When slow block station, reverse gear driven gear and the mating transmission of driven gear at a slow speed.

9. engine for motorcycle speed changer structure as claimed in claim 8, which is characterized in that the speed keeps off switching machine Structure includes a speed speed selector fork, and the fixation of speed speed selector fork is set in one and transmission output shaft is disposed in parallel On speed quick change gear shaft, speed speed selector fork output end is connected with the driven gear that reverses gear, and speed quick change gear shaft can slide axially Ground is mounted on inside case of transmission, and along being opened up perpendicular to axis direction, there are one fast slow-action sections on speed quick change gear shaft surface Slot, the fast slow-action locking nub of a root long bar shaped is equipped in fast slow-action section slot, and fast slow-action locking nub one end is located at described In fast slow-action section slot, the other end is fixed on a fast slow-action nodal axisn inner end, and fast slow-action nodal axisn is installed in rotation on change On fast device shell and tool is there are one the external input terminal of transmission case is located at, and is vertically and fixedly provided on the input terminal of fast slow-action nodal axisn Fast slow-action section handle；

Fast block station is corresponded on speed quick change gear shaft, reverses gear station and slow block station is arranged at intervals with the speeds of three arcs Speed keeps off groove surely, and the corresponding three fast grooves that keep off surely at a slow speed are arranged there are one ball is kept off surely at a slow speed soon, soon at a slow speed on case of transmission Surely gear groove direction is provided with and keeps off spring surely at a slow speed soon gear ball surely away from fast at a slow speed, and gear spring acts on soon at a slow speed surely at a slow speed soon Surely it keeps off ball and is connected to the fast of corresponding gear and keep off in groove surely at a slow speed；

Further include the switching mechanism that reverses gear in gearshift, the switching mechanism that reverses gear includes for installing falling for reverse idler gear Intermediate gear shaft is kept off, reverse idler gear idle running is set on reverse idler gear axis；The switching mechanism that reverses gear further includes corresponding to The switching shift fork that reverses gear of gear intermediate gear setting, switching shift fork fixation of reversing gear are set in one and parallel with reverse idler gear axis set That sets reverses gear in switching shift fork axle, and the switching shift fork output end that reverses gear is connected with reverse idler gear, and reversing gear switching shift fork axle can axis To being slidably mounted on inside case of transmission, along being opened up perpendicular to axis direction, there are one reverse gear on switching shift fork axle surface of reversing gear Switch regulating tank, the switching adjusting block that reverses gear of a root long bar shaped is equipped in the switching regulating tank that reverses gear, switching of reversing gear is adjusted Block one end is located at described reverse gear and switches in regulating tank, and the other end is fixed on a switching adjustment axis inner end of reversing gear, and switching of reversing gear is adjusted Nodal axisn is installed in rotation on case of transmission and tool is there are one the external input terminal of transmission case is located at, and switching of reversing gear is adjusted Switching regulation handle of reversing gear is vertically and fixedly provided on the input terminal of axis, switching regulation handle is reversed gear in rotation can be by the switching tune that reverses gear Locking nub control reverse gear switching shift fork axle axial movement, and then control reverse idler gear reverse gear station and emptying station between cut It changes；

In switching shift fork axle of reversing gear corresponding emptying station and the station that reverses gear be arranged at intervals with two arcs switching of reversing gear keep off surely it is recessed Slot, there are one switchings of reversing gear to keep off ball surely for the setting of gear groove surely for corresponding two switchings of reversing gear on case of transmission, and switching of reversing gear is fixed Gear ball away from reverse gear switching surely gear groove direction be provided with reverse gear switching keep off spring surely, reverse gear switching surely gear spring act on down Gear switching keeps off ball and is connected to reversing gear for corresponding gear surely to be switched in gear groove surely.

10. engine for motorcycle speed changer structure as claimed in claim 8, which is characterized in that gear input gear packet Include from the input terminal of transmission input shaft be sequentially sleeved on transmission input shaft one gear input gear, four gear input gears, Three gear input gears, five gear input gears and two gear input gears, a gear input gear diameter are less than two gear input gears and are less than Three gear input gears are less than four gear input gears and are less than five gear input gears；It is defeated that wherein one gear input gear is fixed on speed changer Enter axis and two gear input gear spline fitteds are mounted on transmission input shaft, four gear input gears and five gear input gears are axial It limits and is mounted on transmission input shaft with can circumferentially rotating, three gear input gears are circumferentially limited and can axially be slided by spline It is mounted on transmission input shaft dynamicly, being provided between three gear input gears and the four adjacent side walls of gear input gears being capable of phase To transmit the concave-convex fit structure of torque, three gear input gears and five are provided between keeping off the adjacent side wall of input gears for mutual grafting It can be mutually inserted to transmit the concave-convex fit structure of torque；