CN108843447A

CN108843447A - Engine for motorcycle gearshift

Info

Publication number: CN108843447A
Application number: CN201810532371.2A
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: 2018-11-20

Abstract

The invention discloses a kind of engine for motorcycle gearshifts, and including the multiple gear input gears being set on transmission input shaft, the multiple gear intermediate gears being set on transmission countershaft, further include shifting fork structure；It is characterized in that, on transmission countershaft positioned at the side of gear intermediate gear also successively fixing sleeve be equipped with quickly gear, reverse gear driving gear and driving gear at a slow speed, and switchably transmission output shaft is arrived in transmission connection.The present invention has can be on the basis of various gears, increase it is fast at a slow speed and gear reversing function, so that engine variable section gear is more required with meeting many-sided operation, practicability is more preferable, hydraulic device power output can also be realized simultaneously, the advantages that facilitate compartment unloading operation, improve motor tricycle the degree of automation.

Description

Engine for motorcycle gearshift

Technical field

The present invention relates to engine for motorcycle fields, shift gears and fill in particular to a kind of engine for motorcycle It sets.

Background technique

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

Existing a common engine for motorcycle, referring to Fig. 1, the cylinder head including being located at upper end fills structure 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 crankshaft 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 along axial parallel Spindle combinations 11 are provided with, are connected between 11 right end of spindle combinations and crank linkage 3 by 10 transmission of clutch main body combination It connects, 11 lower section of spindle combinations is along being arranged in an axially parallel mode and being sequentially connected with countershaft combination 12, and 12 lower section of countershaft combination is along axial flat It goes and is sequentially connected with starting axis combination 13, spindle combinations 11, countershaft combination 12 and starting axis are combined and be equipped between 13 The gearshift being made of multistage power shift gear realizes gear, spindle combinations 11, countershaft combination 12 and starting axis combination 13 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 due to engine for motorcycle installation It is to be transversely mounted along vehicle body, is limited by installation space, so that engine size is limited, each gear in transmission system cannot be set Too, as gear is excessive, to will lead to spatial position insufficient and generate interference with other components for meter；But gear is too small then to have use The defects of service life and stability are lower, 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）, a set of lubricating system is used, the fine impurities that legacy system generates cannot have The filtering of effect, easily damages heat engine system.（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 balance, reduces vehicle form stability, is easy to overturn, safety coefficient is lower.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 service 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.

Summary of the invention

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 On the basis of various gears, increase it is fast at a slow speed and gear reversing function so that engine variable section gear is more to meet many-sided behaviour It is required, the better engine for motorcycle gearshift of practicability.

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

A kind of engine for motorcycle gearshift, including the multiple gear input gears being set on transmission input shaft, The multiple gear intermediate gears being set on transmission countershaft further include one and transmission countershaft shift fork disposed in parallel Axis is axially displaceably arranged with shift fork in shift fork axle, and shift fork one end is connected with corresponding intermediate gear, and the other end is slidably matched In a spiral chute with transmission countershaft speed transmission drum surface disposed in parallel, speed transmission drum and gear change operation input transmission Mechanism is connected, and speed transmission drum rotation can drive corresponding gear intermediate gear is axially mobile to realize shift speed change by shift fork；

It is characterized in that, positioned at the side of gear intermediate gear, also successively fixing sleeve is equipped with quickly tooth on transmission countershaft Take turns, reverse gear driving gear and driving gear at a slow speed, quickly gear diameter is greater than driving gear at a slow speed, quickly gear and One axially position and the quick driven gear that can be set in rotating in a circumferential direction on transmission output shaft engage, at a slow speed driving tooth Wheel and an axially position and the driven gear at a slow speed that can be set in rotating in a circumferential direction on transmission output shaft engagement, master of reversing gear Moving gear and a reverse idler gear that side is arranged in engage；Positioned at quick driven gear and at a slow speed on transmission output shaft The driven gear that reverses gear is additionally provided between driven gear, spline fitted between driven gear and transmission output shaft of reversing gear makes It limit but can circumferentially slide axially, and reverse gear driven gear and quick driven gear and at a slow speed between driven gear, respectively Be correspondingly arranged on opposite side wall pluggable cooperation slotting pawl and slotting claw slot, insert pawl and slotting claw slot it is mating after can be realized Torque transmitting；It further include speed gear switching mechanism, speed gear switching mechanism, which is connected with the driven gear that reverses gear and can stir, to reverse gear Driven gear is axially moveable to fast block station, reverse gear station and slow block station；The driven gear that reverses gear is located at fast block When station, reverse gear driven gear and 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 be with reverse idler gear engaged transmission；When the driven gear that reverses gear is located at slow block station, reverse gear driven gear The mating transmission of driven gear at a slow speed.

In this way, in gearshift, on the basis of existing multistage shift speed regulation, again increase one at a slow speed gear and One quick gear and a reverse gear, may be implemented various gears 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 practical of motor tricycle manipulation Property, while the switching of each gear is realized using the above structure, have structure simple, 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 offer a 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 the external input terminal of transmission case with one, Fast slow-action section handle is vertically and fixedly provided on the input terminal of fast slow-action nodal axisn.

Fast slow-action section handle is rotated in this way, and speed quick change gear shaft can be stirred by fast slow-action locking nub and is moved along axial 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, facilitate operation, 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 arcs keep off at a slow speed groove surely fastly, on case of transmission corresponding three it is fast at a slow speed surely gear groove be provided with one it is fast fixed at a slow speed Ball is kept off, gear groove direction is provided with and keeps off spring surely at a slow speed fastly gear ball surely away from fast at a slow speed surely at a slow speed fastly, keeps off bullet surely at a slow speed fastly Spring is acted on to keep off ball surely at a slow speed fastly 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 fastly The accurate positioning of position, it is ensured that gear shift operation positioning, shift are accurate reliable.

It further include the switching mechanism that reverses gear as optimization, in gearshift, 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 that reversing gear for corresponding reverse idler gear setting switches shift fork, is reversed gear in switching that shift fork is fixed and being set in one and reverse gear Between disposed in parallel reverse gear of gear shaft switch in shift fork axle, reversing gear switches shift fork output end and is connected with reverse idler gear, reverses gear Switching shift fork axle is axially slidably mounted on inside case of transmission, is reversed gear and is switched shift fork axle surface along perpendicular to axis direction It offers one and reverses gear and switch regulating tank, reverse gear and switch the switching adjusting of reversing gear for being equipped with a root long bar shaped in regulating tank Block, reversing gear to switch adjusting block one end and be located at described reverse gear switches in regulating tank, and the other end, which is fixed on one and reverses gear, switches adjustment axis Inner end, reversing gear switches adjustment axis and is installed in rotation on case of transmission and is located at the external input of transmission case with one End, is vertically and fixedly provided with to reverse gear on the input terminal for switch adjustment axis that reverses gear and switches regulation handle, rotation reverse gear switch regulation handle can With by reverse gear switch adjusting block control reverse gear switch shift fork axle axial movement, and then control reverse idler gear in the station that reverses gear Switch between emptying station.

In this way, reverse idler gear can be switched to by the switching mechanism that reverses gear and be put when without using gear reversing function Idle station not will receive centre and reverse gear when so that speed gear switching mechanism switching between slow block station and fast block station The influence of station, can swimmingly realize switching between quickly and at a slow speed, need when avoiding switching at a slow speed fastly by reversing gear and The moment of inertia for causing output end to need to overcome reversion is excessive and damages, and guarantees 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 be switched to the station that reverses gear simultaneously, it is easy to operate and reverse gear switch it is reliable and stable.

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

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 fixed gear ball and realize Gear shift operation positioning is realized in position, ensure that shift is accurate reliable.

As optimization, gear input gear includes being sequentially sleeved at transmission input shaft from the input terminal of transmission input shaft On a gear input gear, four gear input gears, three gear input gears, five gear input gears and second gear input gear, a gear is defeated Enter gear diameter and keeps off input gears less than five less than four gear input gears less than three gear input gears less than second gear input gear； Wherein a gear input gear is fixed on transmission input shaft and second gear input gear spline fitted is mounted on transmission input shaft, Four gear input gears and five gear input gears are axially limited and can be mounted on transmission input shaft with 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 the gear intermediate gear, four being successively arranged that pass through on the transmission countershaft Keep off intermediate gear, three gear intermediate gears, five gear intermediate gears and second gear intermediate gear；Wherein one gear intermediate gear axially limit and It can be mounted on circumferentially rotating on transmission countershaft and be intermeshed with a gear input gear, the four gears intermediate gear relies on Between spline is circumferentially limited and can be axially and slidably installed in the transmission on axis, 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, one/tri- gear switching shift fork phase that the circumferential other side and one are mounted 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 switch, the three gears center tooth It takes turns axial limiting and can be mounted on circumferentially rotating on transmission countershaft and be engaged with three gear input gears；Five gear is intermediate Between gear relies on spline circumferentially to limit and can be axially and slidably installed in the transmission on axis, 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 a second gear shift fork phase being mounted in shift fork axle Even, the second gear intermediate gear axially limit and can be mounted on circumferentially rotating on transmission countershaft and with second gear input gear Engagement, being provided between five gear intermediate gears and the adjacent side wall of second gear intermediate gear can be mutually inserted to transmit the recessed of torque Convex fit structure, second gear shift fork can control five gear intermediate gears be axially moveable and with five gear input gears engagement and and Switch between second gear intermediate gear is mating；

It is located between one/tri- gear switching shift fork and second gear shift fork in shift fork axle and is additionally provided with one four/five gear switching shift fork, four/ Five gear switching shift forks and three gear input gears are connected, and are provided with energy 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 the available 15 kinds of speed output altogether of reversion gear, 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 variable block axis disposed in parallel with And one and the vertically disposed main tooth variable block axis of secondary tooth variable block axis, secondary tooth variable block axis and speed transmission drum transmission connection, the pair tooth become Gear shaft and main tooth variable block axis are 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.

As optimization, it is additionally provided with hydraulic power taking output device, hydraulic power taking output device has one and is used for and slows down Device input shaft or the power intake of retarder jackshaft or reducer output shaft transmission connection, also have one and are exposed to The power output end of reducer shell.

In this way, after increasing hydraulic 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 optimization, the hydraulic power taking output device and the setting of reducer output shaft spacing parallel arranging, hydraulic power taking output The power intake of device has the power taking driven gear being used for the gear engaged transmission on retarder jackshaft, hydraulic The power output end of power taking output device has a connecting bushing, and connecting bushing is rotatably arranged on case of transmission, 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 power taking output device.It in this way can be with Preferably improve hydraulic power taking output device output revolving speed.Wherein connecting bushing inner cavity can be spline housing inner cavity or cross section For the inner cavity of polygon, connection transmitting torque may be incorporated for.

As optimization, on-off control mechanism is additionally provided in hydraulic power taking output device, on-off control mechanism is for controlling Transmission connection between connecting bushing and power taking driven gear turns off or on.

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

Further, on-off 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 cooperates On the first splined shaft or the second splined shaft, on-off control mechanism further includes the power taking shift fork connected with spline housing, is taken Power shift fork is fixed in the power taking shift fork axle that one is axially slidably mounted in reducing gearbox body, power taking shift fork axle surface edge A power taking control regulating tank is offered perpendicular to axis direction, is equipped with a root long item in power taking control regulating tank The power taking control adjusting block of shape, power taking control adjusting block one end are located in 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 control that spline housing is mobile to realize connecting or disconnecting for the first splined shaft and the second splined shaft.

In this way, realizing on-off control using the structure, have structure simple, stable transmission is easy to control quick and sensitive The advantages that reliable.

Further, the on-off switching that two arcs are arranged at intervals in power taking shift fork axle keeps off groove surely, and two on-off 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 gear groove is provided with an on-off switching and keeps off ball surely the switching of two on-off, and gear ball is fixed away from on-off switching surely for on-off switching Gear groove direction is provided with on-off switching and keeps off spring surely, on-off switching surely gear spring act on on-off switching keep off surely ball and by its Corresponding on-off switching is connected to keep off in groove surely.

In this way, by on-off switching, gear ball realizes the accurate positioning to two stations surely when on-off control mechanism works, It ensure that the on-off switching control of hydraulic power taking output device is accurately reliable.

In conclusion the present invention have can on the basis of various gears, increase it is fast at a slow speed and gear reversing function so that starting Machine is adjusted gear and is more required with meeting many-sided operation, and practicability is more preferable, while can also realize that hydraulic device power is defeated Out, to facilitate compartment unloading operation, improve motor tricycle the degree of automation the advantages that.

Detailed description of the invention

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 Cross-sectional view.

Fig. 4 be in the engine of Fig. 2 case of transmission and its internal structure from the cross-sectional view of another angle.

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 on-off control mechanism in hydraulic 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 embodiment

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, the cylinder head assembly combination 1 including being located 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, and also covering is equipped with right crankcase cover 6, left crankcase and right crankcase outside right crankcase 8 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, also edge has been arranged in an axially parallel mode main shaft below crank linkage 3 12, by 10 transmission connection of clutch main body combination 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 Transmission connection, crank axle axial line intersect with plane and transmission input shaft where spindle axis line in an angle；Speed changer is defeated Enter axis 14 to be mounted 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 that gear, transmission output shaft have one and extend 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, can be designed more greatly 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, 13 end of input shaft connector sleeve has an 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 Speed changer lubrication system is provided on fast device shell.Specifically, speed changer lubrication system can be including 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 directlys adopt oil injecting lubricating, and structure is simple, and lubrication is convenient and has been greatly saved cost.

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

Wherein, see Fig. 3, the crankcase lubrication system includes 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 23 engaged transmission of driving gear for being 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, a built-in filter 11 is additionally provided in crankcase circulating oil system, the built-in filter has One filter right cover for being installed in rotation on 6 inner wall of right crankcase cover and one are fixedly mounted on the filter of 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, circulating the cooling for realizing engine by above-mentioned water pump component structure drive cooling water.It relies on simultaneously One power output drives oil pump and pump working simultaneously, has many advantages, such as that structure is simple, 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, and multiple gears including being set on transmission input shaft 14 input tooth 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 successively fixing sleeve is equipped with quickly on transmission countershaft 15 Gear 30, reverse gear driving gear 31 and driving gear 32 at a slow speed, quickly 30 diameter of gear is taken turns greater than driving tooth 32 at a slow speed, fastly Fast driving gear 30 and an axially position and the quick driven tooth that can be set in rotating in a circumferential direction on transmission output shaft 16 33 engagement of wheel, driving gear 32 and an axially position and can be set on transmission output shaft 16 at a slow speed with rotating in a circumferential direction Driven gear 34 engages at a slow speed, reverses gear driving gear 31 and a reverse idler gear 35 that side is arranged in engages；Speed changer It is located at quick driven gear 33 on output shaft 16 and is additionally provided with the driven gear 36 that reverses gear between driven gear 34 at a slow speed, Spline fitted limits it circumferentially 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 be realized torque transmitting；It 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 The mating transmission of moving gear 33；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 the speed quick change gear shaft 38 disposed in parallel of transmission output shaft 16,37 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 equipped with a root long in fast slow-action section slot along a fast slow-action section slot is offered perpendicular to axis direction 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, which is installed in rotation on case of transmission 19 and has one, to be 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, on case of transmission corresponding three fast gear groove is provided with one and keeps off surely at a slow speed fastly surely at a slow speed Ball 43, fastly 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 fastly Spring 44 is acted on to keep off ball 43 surely at a slow speed fastly and be connected to the fast of corresponding gear and be kept off in groove 42 surely at a slow speed.

It wherein, further include the switching mechanism that reverses gear in gearshift, 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 that reversing gear for corresponding reverse idler gear setting switches shift fork 46, reverse gear switch shift fork 46 it is fixed be set in one and Disposed in parallel reverse gear of reverse idler gear axis switches in shift fork axle 47, reverses gear and switches 46 output end of shift fork and reverse idler gear 35 are connected, and reversing gear switches shift fork axle 47 and be axially slidably mounted on inside case of transmission 19, reverse gear and switch 47 table of shift fork axle Face edge offers one and reverse gear perpendicular to axis direction switches regulating tank, and reversing gear to switch is equipped with a root long item in regulating tank Reversing gear for shape switches adjusting block 48, and reversing gear to switch 48 one end of adjusting block and be located at described reverse gear switches in regulating tank, and the other end is fixed It reverses gear at one and switches 49 inner end of adjustment axis, reversing gear switches adjustment axis 49 and be 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 that reverses gear and is adjusted Handle 50, rotation reverse gear switch regulation handle can by reverse gear switch adjusting block control reverse gear switch shift fork axle axial movement, And then control reverse idler gear reverse gear station and emptying station between switch.

Wherein, it reverses gear and switches in shift fork axle 47 corresponding emptying station and the station that reverses gear is arranged at intervals with reversing gear for two arcs Switching keeps off groove 51 surely, and corresponding two reverse gear to switch fixed gear groove 51 and be provided with one and reverse gear and switch fixed gear and roll on case of transmission Pearl 52, reversing gear switches fixed gear ball 52 and switches fixed gear spring 53 away from reversing gear to switch fixed gear groove direction and be provided with to reverse gear, and reverses gear Surely gear spring 53 acts on to reverse gear and switches fixed gear ball 52 and be connected to reversing gear to switch and determining gear groove for corresponding gear for switching In 51.

Wherein, it is additionally provided with hydraulic power taking output device, there is hydraulic power taking output device one to be used for and retarder is defeated The power intake for entering axis or retarder jackshaft or reducer output shaft transmission connection, also has one and is exposed to deceleration The power output end of device shell.

Wherein, the hydraulic power taking output device and the setting of reducer output shaft spacing parallel arranging, hydraulic power taking output device Power intake have one for and retarder jackshaft on gear engaged transmission power taking driven gear 54, it is hydraulic to take The power output end of power output device has a connecting bushing 55, and 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, on-off control mechanism is additionally provided in hydraulic power taking output device, on-off control mechanism is for controlling connection Transmission connection between axle sleeve and power taking driven gear turns off or on.

Wherein, on-off 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, on-off 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 is fixed in the power taking shift fork axle 59 that one is axially slidably mounted in reducer shell 19, is taken Match in power taking control regulating tank along a power taking control regulating tank is offered perpendicular to axis direction on 59 surface of power shift fork axle 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 mounted on case of transmission and is located at the external input terminal of transmission case, the power taking control input terminal of adjustment axis with one On be vertically and fixedly provided with power taking control regulation handle 62, rotation power taking control regulation handle can pass through power taking control with adjusting Block controls the axial movement of power taking shift fork axle, so control the mobile connection for realizing the first splined shaft and the second splined shaft of spline housing or It disconnects.

Wherein, the on-off switching that two arcs are arranged at intervals in power taking shift fork axle 59 keeps off groove 63 surely, and two on-off 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 It answers two on-off to switch gear groove 63 surely and is provided with on-off switching gear ball 64 surely, on-off switching keeps off ball 64 away from logical surely Surely gear groove direction is provided with on-off switching and keeps off spring 65 surely for disconnected switching, and to act on on-off switching fixed for gear spring 65 surely for on-off switching It keeps off ball 64 and is connected to corresponding on-off 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 A gear input gear 71, four keep off input gear 74, three and keep off input gear 73, five and keep off input gear 75 and second gear input gear 72, it is small less than four gear input gears 74 less than three gear input gears 73 that gear 71 diameter of input gear is less than second gear input gear 72 Input gear 75 is kept off in five；Wherein a gear input gear 71 is fixed on transmission input shaft 14 and 72 spline of second gear input gear It is fitted on transmission input shaft 14, four gear input gears 74 and five keep off 75 axial limitings 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 three gear input gears 73 and the four adjacent side walls of gear input gears 74 can be mutually inserted to pass Pass the concave-convex fit structure of torque, being provided between three gear input gears 73 and the adjacent side wall of five gear input gears 75 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 successively arranged that passes through on the transmission countershaft 15 81, four gear intermediate gears 84, three keep off intermediate gear 83, five and keep off intermediate gear 85 and second gear intermediate gear 82；Wherein a gear is intermediate 81 axial limiting of gear and can be mounted on circumferentially rotating on transmission countershaft and with one gear input gear 71 be intermeshed, institute Four gear intermediate gears 84 are stated by spline circumferentially limit and between capable of being axially and slidably installed in the transmission on axis, four gears are intermediate Being provided between gear 84 and an adjacent side wall of gear intermediate gear 81 can be mutually inserted to transmit the male-female engagement knot of torque Structure, being provided between four gear intermediate gears 84 and the three adjacent side walls of gear intermediate gears 83 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 being mounted 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 can be mounted on change with 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, the circumferential side of five gear intermediate gear 85 and five gear input gears 75 are engaged, and five The circumferential other side of gear intermediate gear 85 is connected with a second gear shift fork 77 being mounted in shift fork axle, the second gear intermediate gear 82 axial limitings and can be mounted on circumferentially rotating on transmission countershaft and with second gear input gear 72 engage, five gear center tooths Being provided between wheel 85 and the adjacent side wall of second gear intermediate gear 82 can be mutually inserted to transmit the concave-convex fit structure of torque, Second gear shift fork 77 can control five gear intermediate gears 85 and be axially moveable and keep off the engagement of input gears 75 and and second gear with five Switch between intermediate gear 82 is mating；

It is located between one/tri- gear switching shift fork 76 and second gear shift fork 77 in shift fork axle and is additionally provided with one four/five gear switching shift fork 78, four/five gear switching shift forks 78 are connected with three gear input gears 73, three gear input gears 73 and four gear 74 sides adjacents of input gear Being provided between wall can be mutually inserted to transmit the concave-convex fit structure of torque, three gear input gears 73 and five gear input gears 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 includes one and the secondary tooth variable block axis disposed in parallel of speed transmission drum 29 79 and one and the vertically disposed main tooth variable block axis 80 of secondary tooth variable block axis 79, secondary tooth variable block axis 79 and speed transmission drum transmission connection, The pair tooth variable block axis 79 and main tooth variable block axis 80 are 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 that

（1）New engine for motorcycle uses individual gearbox, and gearbox changes the direction with transmission of crankshaft, is formed The angle in one space, reduces limitation of the body width to engine size so that transmission components have it is bigger only 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 components 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 be in set output, be more easier with axletree dock, and make complete machine layout it is more balanced, improve vehicle Stability, is not easy to overturn, safety coefficient is higher.

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

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

Claims

1. a kind of engine for motorcycle gearshift, multiple gears including being set on transmission input shaft input tooth Wheel, the multiple gear intermediate gears being set on transmission countershaft further include that one and transmission countershaft are disposed in parallel Shift fork axle is axially displaceably arranged with shift fork in shift fork axle, and shift fork one end is connected with corresponding intermediate gear, other end sliding Cooperate in a spiral chute with transmission countershaft speed transmission drum surface disposed in parallel, speed transmission drum and gear change operation input Transmission mechanism is connected, and speed transmission drum rotation can drive corresponding gear intermediate gear is axially mobile to realize that shift becomes by shift fork Speed；

2. engine for motorcycle gearshift as described in claim 1, which is characterized in that the speed keeps off switching mechanism Including a speed speed selector fork, the fixation of speed speed selector fork is set in one and transmission output shaft is disposed in parallel fast At a slow speed on shifting shaft, speed speed selector fork output end is connected with the driven gear that reverses gear, and speed quick change gear shaft is axially slidably It being mounted on inside case of transmission, speed quick change gear shaft surface edge offers a fast slow-action section slot perpendicular to axis direction, The fast slow-action locking nub of a root long bar shaped is equipped in fast slow-action section slot, fast slow-action locking nub one end is located at the speed In fast regulating tank, 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 speed changer It is located at the external input terminal of transmission case on shell and with one, is vertically and fixedly provided with speed on the input terminal of fast slow-action nodal axisn Fast regulation handle.

3. engine for motorcycle gearshift as claimed in claim 2, which is characterized in that corresponding on speed quick change gear shaft Fast block station reverses gear station and what slow block station was arranged at intervals with three arcs keeps off at a slow speed groove, case of transmission surely fastly Upper correspondence three is fast, and gear groove is provided with one and keeps off ball surely at a slow speed fastly surely at a slow speed, and gear ball deviates from and keeps off surely at a slow speed fastly surely at a slow speed fastly Groove direction is provided with keeps off at a slow speed spring fastly surely, and gear spring acts on and fast keep off ball surely at a slow speed and be connected to pair surely at a slow speed fastly The fast of gear is answered to keep off in groove surely at a slow speed.

4. engine for motorcycle gearshift as claimed in claim 2, which is characterized in that further include one in gearshift A switching mechanism that reverses gear, the switching mechanism that reverses gear include the reverse idler gear axis for installing reverse idler gear, centre of reversing gear Gear idle running is set on reverse idler gear axis；The switching mechanism that reverses gear further includes that corresponding reversing gear for reverse idler gear setting is cut Shift fork is changed, reversing gear switches that shift fork is fixed to be set in one and disposed in parallel reverse gear of reverse idler gear axis switches in shift fork axle, It reverses gear and switches shift fork output end and be connected with reverse idler gear, reversing gear switches shift fork axle and be axially slidably mounted on transmission case Internal portion, reversing gear switches shift fork axle surface and switches regulating tank along offering one perpendicular to axis direction and reverse gear, and switching of reversing gear is adjusted Reversing gear for root long bar shaped is equipped in section slot and switches adjusting block, is reversed gear and is switched adjusting block one end positioned at the switching of reversing gear In regulating tank, the other end, which is fixed on one and reverses gear, switches adjustment axis inner end, and reversing gear switches adjustment axis and be installed in rotation on speed change It is located at the external input terminal of transmission case on device shell and with one, is vertically and fixedly provided on the input terminal for switch adjustment axis that reverses gear It reverses gear and switches regulation handle, rotation, which is reversed gear, to be switched regulation handle and can switch adjusting block control by reversing gear and reverse gear and switch shift fork axle Axial movement, so control reverse idler gear reverse gear station and emptying station between switch.

5. engine for motorcycle gearshift as claimed in claim 4, which is characterized in that reversing gear, it is right in shift fork axle to switch Station should be vented and the station that reverses gear is arranged at intervals with reversing gear to switch and determining gear groove for two arcs, it is two corresponding on case of transmission It reverses gear to switch fixed gear groove and be provided with one and reverse gear to switch and determines gear ball, reversing gear switches fixed gear ball to switch fixed gear recessed away from reversing gear Slot direction, which is provided with to reverse gear to switch, determines gear spring, and reversing gear to switch fixed gear spring and act on to reverse gear switches fixed gear ball and abutted Switch in fixed gear groove in corresponding reversing gear for gear.

6. engine for motorcycle gearshift as described in claim 1, which is characterized in that gear input gear include from The input terminal of transmission input shaft is sequentially sleeved at a gear input gear, four gear input gears, three gears on transmission input shaft Input gear, five gear input gears and second gear input gear, a gear input gear diameter are less than second gear input gear less than three gears Input gear is less than four gear input gears less than five gear input gears；Wherein a gear input gear is fixed on transmission input shaft And second gear input gear spline fitted is mounted on transmission input shaft, four gear input gears and five gear input gears axially limit And can be mounted on transmission input shaft with circumferentially rotating, three gear input gears by spline circumferentially limit and axially slidably It is mounted on transmission input shaft, being provided between three gear input gears and the four adjacent side walls of gear input gears being capable of phase interfix It connects to transmit the concave-convex fit structure of torque, being provided between three gear input gears and the adjacent side wall of five gear input gears can It is mutually inserted to transmit the concave-convex fit structure of torque；

7. engine for motorcycle gearshift as described in claim 1, which is characterized in that it is defeated to be additionally provided with hydraulic power taking Device out, hydraulic power taking output device is with one for defeated with reducer input shaft or retarder jackshaft or retarder The power intake of shaft transmission connection, is also exposed to the power output end of reducer shell with one；

The hydraulic power taking output device and the setting of reducer output shaft spacing parallel arranging, the power input of hydraulic power taking output device Holding has the power taking driven gear being used for the gear engaged transmission on retarder jackshaft, hydraulic power taking output device Power output end has a connecting bushing, and connecting bushing is rotatably arranged on case of transmission, and connecting bushing inner cavity is For power output connection chamber and outer end be exposed to case of transmission and form hydraulic device interface, connecting bushing and power taking It is sequentially connected between driven gear.

8. engine for motorcycle gearshift as claimed in claim 7, which is characterized in that connecting bushing inner cavity is spline Cover inner cavity.

9. engine for motorcycle gearshift as claimed in claim 7, which is characterized in that in hydraulic power taking output device It is additionally provided with on-off control mechanism, on-off control mechanism is used to control the transmission connection between connecting bushing and power taking driven gear It turns off or on.

10. engine for motorcycle gearshift as claimed in claim 9, which is characterized in that on-off 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 cooperates on the first splined shaft or the second splined shaft, on-off control Mechanism processed further includes the 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 the fast intracorporal power taking shift fork axle of device shell, power taking shift fork axle surface offers a power taking control tune along perpendicular to axis direction Slot is saved, the power taking control adjusting block of a root long bar shaped, power taking control adjusting are equipped in power taking control regulating tank Block one end is located in 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 with one 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 that spline housing is mobile to realize the first splined shaft and the Two splined shafts connect or disconnect；

The on-off switching that two arcs are arranged at intervals in the power taking shift fork axle keeps off groove surely, and two on-off switchings keep off groove surely It is connected and disconnected from two stations with the first splined shaft and the second splined shaft to be correspondingly arranged, corresponding two on-off are cut on case of transmission It changes fixed gear groove and is provided with the switching of on-off and keep off ball surely, gear ball away from on-off switching keeps off groove direction surely surely for on-off switching It is provided with on-off switching and keeps off spring surely, gear spring acts on on-off switching and keeps off ball surely and be connected to correspondence surely for on-off switching On-off switching surely keep off groove in.