CN101245845B - Gear change mechasnim and engine unit having the same - Google Patents

Gear change mechasnim and engine unit having the same Download PDF

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Publication number
CN101245845B
CN101245845B CN2008100093091A CN200810009309A CN101245845B CN 101245845 B CN101245845 B CN 101245845B CN 2008100093091 A CN2008100093091 A CN 2008100093091A CN 200810009309 A CN200810009309 A CN 200810009309A CN 101245845 B CN101245845 B CN 101245845B
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main body
speed change
engine unit
box main
supporting part
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CN101245845A (en
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青山淳
畑慎一朗
香山仁
牧野浩直
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Yamaha Motor Co Ltd
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Yamaha Motor Co Ltd
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Abstract

The invention provides a gear change mechanism and an engine unit with the gear change mechanism which avoids the macro-scale of the engine unit and advances the operating performance when maintenance. The gear change mechanism has a stepless speed change mechanism (17) and a holding case (a transmission case) (8b) for holding the stepless speed change mechanism (17). A shift state transition mechanism (54) for changing the shift state of the stepless speed change mechanism (17) is arranged in the holding case (8b), and an axle suspension part (75) of the bears (72b, 73b, 74b) of the axes (61, 62, 63) of the shift state transition mechanism (54) is composed of different components of the case part (the case main body) (8g) of the holding case (8b).

Description

Speed change gear and have the engine unit of this speed change gear
Technical field
The engine unit that the present invention relates to comprise the speed change gear of stepless speed changing mechanism and the storage case that holds this stepless speed changing mechanism and have this speed change gear.
Background technique
For example, in scooter, generally has following structure: support engine main body in the mode that can swing up and down and hold the swing engine unit in the incorporate unit of storage case of V-type Belt-type Adjustable-speed mechanism by body shell.
In described engine unit, has speed change state switching mechanism sometimes, described speed change state switching mechanism is carried out variable control according to engine speed, the speed of a motor vehicle etc. to the belt coil diameter of the driving pulley of stepless speed changing mechanism by drive motor, to obtain the gear ratio corresponding with the operating condition of motor.
As described speed change state switching mechanism, the someone proposes the technological scheme of following structure, by a plurality of reduction gear axles the rotation of drive motor is converted to the moving axially of movable side belt wheel (for example, with reference to patent documentation 1) of driving pulley that is:.
At this moment, can consider following structure, that is: described speed change state switching mechanism is contained in the switching mechanism accommodating chamber according to the split that is provided with the indoor mode that is communicated with of the belt of storage case; Or the box main body by constituting described storage case and releasably be installed in described each reduction gear axle of case lid axle supporting on this box main body.
Patent documentation 1: the Japanese documentation spy opens the 2000-111331 communique.
Yet,, exist to make speed change gear become problem big and then that engine unit is maximized when when the structure with the switching mechanism accommodating chamber of described storage case split is set.
In addition, when when described each reduction gear axle being carried out the structure of pivot suspension, for example there is following problem by box main body and case lid, that is: when comprising the maintenance of changing the V-type band, if pull down case lid, then the reduction gear axle becomes cantilever position, thereby operation is low.
Summary of the invention
The present invention finishes in view of described existing situation, and purpose is to provide a kind of engine unit of can avoiding to maximize, and can improve the speed change gear of the operation when keeping in repair and have the engine unit of this speed change gear.
The invention provides a kind of speed change gear, have stepless speed changing mechanism and the storage case that holds this stepless speed changing mechanism, it is characterized in that, the speed change state switching mechanism of the speed change state of the described stepless speed changing mechanism of configuration change in described storage case constitutes the shaft supporting part of supporting as the axle of one of component parts of this speed change state switching mechanism by the parts different with the box part that constitutes described storage case.
According to speed change gear of the present invention, because speed change state switching mechanism is configured in the storage case, the speed change gear in the time of therefore can avoiding being provided with the speed change state switching mechanism accommodating chamber of split maximizes.
In addition, owing to constitute the shaft supporting part of supporting as the axle of one of component parts of described speed change state switching mechanism by the parts different with the box part that constitutes storage case, therefore when carrying out the maintenance of stepless speed changing mechanism, even when pulling down a part of box part, the axle of speed change state switching mechanism can not become cantilever position yet, thereby can avoid the low of operation.
Description of drawings
Fig. 1 is the side view of motorcycle with engine unit of an embodiment of the invention;
Fig. 2 is the side view of described engine unit;
Fig. 3 is the side view of the transmission case of described engine unit;
Fig. 4 is the top view in cross-section that is contained in the V-type Belt-type Adjustable-speed mechanism in the described transmission case;
Fig. 5 holds the top view in cross-section that is configured in the speed change state switching mechanism in the described transmission case;
Fig. 6 is the side view of the front portion of described transmission case;
Fig. 7 is the side view of the front portion of described transmission case;
Fig. 8 is the sectional view of described speed change state switching mechanism;
Fig. 9 is the sectional view of described speed change state switching mechanism;
Figure 10 is the side view of the shaft supporting part of described speed change state switching mechanism;
Figure 11 is the sectional view (the XI-XI line sectional view of Figure 10) of described shaft supporting part;
Figure 12 is the sectional view (the XII-XII line sectional view of Figure 10) of described shaft supporting part.
Embodiment
Below, based on accompanying drawing embodiments of the present invention are described.
Fig. 1 to Figure 12 is the figure that is used to illustrate the engine unit of the speed change gear with one embodiment of the present invention.In the present embodiment, be that example describes with the engine unit that is loaded on the motorcycle.In addition, in description of the present embodiment, so-called all around is meant all around when being sitting in state on the vehicle seat and watching.
In the drawings, the small-sized motorcycle of 1 expression.This motorcycle 1 has: lower skeleton type body shell 2; Front fork 6, the head pipe 3 by being positioned at these body shell 2 front ends by can about turn to the ground pivot suspension, dispose front-wheel 4 in its underpart, the end disposes steering handle 5 thereon; The swing engine unit 8 in unit is supported on the described body shell 2 in the mode that can swing up and down, and disposes trailing wheel 7 in rearward end; And double riding bestride type vehicle seat 9, be loaded into the top of the engine unit 8 of described body shell 2.
The front side of described front fork 6 is covered by protecgulum 11, and rear side is covered by support guard shield 12, is covered by side cover 13 around the below of described vehicle seat 9.In addition, between described support guard shield 12 and side cover 13, be equipped with the foot treadle (not shown) of low level.
Described body shell 2 has: about following pipe 20,20, extend to the expansion of the overall width direction outside and to the rear lower side from described head pipe 3, and from this lower end rearward approximate horizontal ground extend; Left and right sides vehicle seat rail 21,21, rearward extend obliquely at the middle part of pipe 20 down about this, and from the rear end rearward approximate horizontal ground extend; And left and right sides motor suspension framework 22,22, about described, descend to manage 20 rear end direction extension up and down, the upper end portion is connected with described left and right sides vehicle seat rail 21.
In addition, described body shell 2 has: about go up pipe 24,24, from the roughly straight line shape ground extensions rearward of described head pipe 3, rearward end is connected with described left and right sides vehicle seat rail 21; Left and right sides seat post 25,25 connects described left and right sides motor suspension framework 22,22 and vehicle seat rail 21; Cross member 23 is between near the joint that connects described left and right sides vehicle seat rail 21 and motor suspension framework 22 on the overall width direction.
Between described cross member 23 and described engine unit 8, be provided with rear suspension 10.In addition, dispose storage case 33 below the vehicle seat 9 of described body shell 2, dispose fuel tank 30 in the front side of this storage case 33, equipped with radiator 31 below this fuel tank 30.
Described engine unit 8 comprises: the engine main body 8a that produces output; Export the bent axle (output shaft) 18 of this output; And form with this engine main body 8a, hold the transmission case with belt chamber a (storage case) 8b of configuration V-type Belt-type Adjustable-speed mechanism 17.
Described engine main body 8a is the water-cooled four-cycle single-cylinder engine that cylinder-bore axis A is loaded towards general horizontal direction, has following structure: accommodating on the preceding mating face of the crankcase 8c of the bent axle 18 that the overall width direction is extended, combine the cylinder block 8d that accommodates piston 19 sliding freely, on the preceding mating face of this cylinder block 8d, combine the cylinder head 8e that disposes spark plug 16, air inlet, exhaust cam shaft (not shown), on this cylinder head 8e, housing 8f is installed.Described piston 19 links by connecting rod 15 and described bent axle 18.
Upper wall surface at described cylinder head 8e is connected with the suction tude 37 that is communicated with suction port.Downstream end in this suction tude 37 is equipped with Fuelinjection nozzle 38, disposes throttle valve 39 at the upstream side of the Fuelinjection nozzle 38 of this suction tude 37.The upstream extremity of described suction tude 37 is connected with the air-strainer 36 that the upper wall surface of described transmission case 8b is fixed in configuration.
On the diapire of the crankcase 8c of described engine main body 8a, be formed with pairing left and right suspension arm 8j, 8j according to forwards outstanding mode.In addition, near the pivotal parts 47,47 about being fixed with the joint of described left and right sides motor suspension framework 22,22 and following pipe 20.
For described engine unit 8, its left and right sides suspension arm 8j, 8j are directly supported by the left and right sides motor suspension framework 22 of body shell 2 via described pivotal parts 47, make to swing up and down.In addition, though diagram not, the pivotal parts 47 about described has the structure that is fixed with elastic members such as rubber between the inner core of urceolus that is fixed in motor suspension framework 22 and insertion pivot 51.Suspension arm 8j about described can be supported on described pivot 51 (with reference to Fig. 2) rotationally by bearing.
Described V-type Belt-type Adjustable-speed mechanism 17 has V-type band 42 is wound on structure on driving pulley 40 and the driven pulley 41, described driving pulley 40 is installed on the axial left part 18a of bent axle 18 outstanding in described transmission case 8b, and described driven pulley 41 is configured on the rearward end of this transmission case 8b.
Described driving pulley 40 has: according to the chimeric drive shaft sub-assembly cylindraceous 43 of mode spline with bent axle 18 rotations; According to the movable sheave 40a that on this drive shaft sub-assembly 43, can move vertically and install with the mode of this drive shaft sub-assembly 43 rotations; And can not be fixed in the left part 18a of described bent axle 18 vertically movably, and with the fixed pulley 40b of these bent axle 18 rotations by locking nut 44.
Described driven pulley 41 has: rotation is installed in freely by the driven shaft parts 46 cylindraceous on the running shaft 44 of transmission case 8b axle supporting; According to not moving vertically and being fixed on fixed pulley 41b on these driven shaft parts 46 with the mode of driven shaft parts 46 rotation; According to moving vertically and being installed in movable sheave 41a on the described driven shaft parts 46 with the mode that fixed pulley 41b rotates; And be arranged on centrifugal clutch 60 between described driven shaft parts 46 and the running shaft 44.If the rotational speed of driven pulley 41 rises, then because centrifugal force makes the clutch plate 66 and clutch drum 62 butts of centrifugal clutch 60, the rotation of driven pulley 41 is delivered to running shaft 44 thus.
The right-hand end 44a of described running shaft 44 is inserted in the gear chamber c that the belt chamber a with described transmission case 8b independently forms, and in this gear chamber c, intermediate reduction gear axle 48 and rear-wheel spindle 7a and running shaft 44 dispose abreast.The right-hand end 7b of this rear-wheel spindle 7a is side-prominent in the overall width direction from transmission case 8b, and described trailing wheel 7 is installed on this right-hand end 7b.
Described transmission case 8b has: box main body 8g, and integrally formed according to the mode that the left side wall 8n with described crankcase 8c also rearward extends continuously, have the hole 8c ' that described bent axle 18 is connected, in fact hold the described stepless speed changing mechanism 17 of supporting; Case lid (cover) 8h, releasably bolton is on the left-interface face 8i of this box main body 8g.
Exterior front at described case lid 8h releasably is equipped with the cooling air introduction channel 27 that has to the cooling air introducing port 27a of vehicle front opening.
Part at the driving pulley 40 that adjoins described case lid 8h is formed with a plurality of cooling airs inflow opening 8m around bent axle 18 with predetermined distance, and the upstream side that flows into opening 8m at this cooling air releasably is equipped with the filter 28 that filters cooling air.The wind that travels from described cooling air introducing port 27a flows into flows into opening 8m by filter 28 from cooling air and is directed in a of belt chamber.
The front end of described transmission case 8b according to belt chamber a continuously and the mode of extending to oblique front upper place bulge and be formed with coil diameter control room b.
When seeing from the side, described coil diameter control room b is according to extending with the roughly overlapping mode of the left side wall of described cylinder block 8d on the overall width direction, prolonged wall 8p and left side prolongation wall 8q encirclement by the right side, described right side prolong wall 8p according to the left side wall 8n of crankcase 8c continuously and the mode of forwards extending form, described left side prolong wall 8q according to the front edge of described case lid 8h continuously and the mode of forwards extending form.
In described coil diameter control room b, dispose the speed change state switching mechanism 54 of the speed change state that changes described stepless speed changing mechanism 17.
Described speed change state switching mechanism 54 passes to reciprocating gear 56 by the rotation with drive motor 55, and with the rotation of this reciprocating gear 56 be converted to driving pulley 40 moving axially of movable sheave 40a and between low L (low) and high T (top) the belt coil diameter of automatically variable this driving pulley 40 of control.Described drive motor 55 carries out drive controlling according to engine speed, the speed of a motor vehicle etc. or driver's indication by not shown controller.
Described speed change state switching mechanism 54 has: gear part 57 is transmitted in rotation, and the rotation of described drive motor 55 is passed to described reciprocating gear 56; And move axially changeover part 58, the rotation of this reciprocating gear 56 is converted to moving axially of movable sheave 40a.
Described rotation is transmitted gear part 57 according to disposing with the approaching mode of driving pulley 40 in described coil diameter control room b, described move axially changeover part 58 be configured in driving pulley 40 in a of belt chamber and the bent axle 18 between the left side wall 8n around.
Described drive motor 55 is configured in the top front portion of crankcase 8c according to top that is positioned at bent axle 18 and the mode parallel with this bent axle 18, and is fixed on the overall width direction inner side surface that the described right side that forms coil diameter control room b prolongs wall 8p.The running shaft 55a of this drive motor 55 connects right side prolongation wall 8p and outstanding in the b of coil diameter control room.
Described rotation is transmitted gear part 57 and is had: first, second passing shaft 61,62 that the rotation of described drive motor 55 is passed to reciprocating gear 56; And the detection axle 63 that detects the rotation status of this drive motor 55.
Described first, second passing shaft 61,62 and detection axle 63 dispose abreast with bent axle 18.When vehicular sideview is seen, detect the front end that axle 63 is positioned at coil diameter control room b, first passing shaft 61 is positioned at the rear of this detections axle 63, and second passing shaft 62 is positioned at the oblique rear lower side of this detection spools 63, and running shaft 55a is positioned at the rear of first passing shaft 61.
Described first passing shaft 61 has deceleration gearwheel 61a and the reduction pinion teeth 61b with the output gear 55a of drive motor 55 engagement.
Described second passing shaft 62 has and the sliding gear 62a of described reduction pinion teeth 61b and described reciprocating gear 56 both engagements and the diameter sensor gear 62b less than this sliding gear 62a.
The described axle 63 that detects has detection axle actuation gear 63a and the rotating speed measuring gear 63b that meshes with described sensor gear 62b.On this rotating speed measuring gear 63b, be engaged with the input gear 64a of speed probe 64.This speed probe 64 detects the axial position of movable sheave 40a according to the rotary state of described drive motor 55, and then detects the coil diameter position of V-type band 42.
The described changeover part 58 that moves axially has: according to the sliding barrel 65 that rotates with described movable pulley 40a and mobile vertically mode is installed; Be bearing on this sliding barrel 65 freely and be fixed on movable side feed screw parts 67 on the reciprocating gear 56 by bearing 66 relative rotations; And with the fixed side feed screw parts 68 of these movable side feed screw parts 67 engagements.
Described fixed side feed screw parts 68 are being supported in revolvably mode not by the support unit 69 of bolton on box main body 8g.At this support unit 69 be provided with centering spindle between according to the bearing support 70 fixing and hold 71 with the mode of bent axle 18 rotation.
When the accelerator opening operation that is accompanied by the driver rose engine speed, the speed of a motor vehicle, the rotation of controlling and driving motor 55 was to become according to this engine speed, the speed of a motor vehicle and predefined belt coil diameter.When the rotation of the running shaft 55a of this drive motor 55 passes to reciprocating gear 56 from first, second passing shaft 61,62, when making these reciprocating gear 56 rotations, movable side feed screw parts 67 only move the distance corresponding with the rotating amount of drive motor 55 together vertically with reciprocating gear 56.Thereupon, movable sheave 40a is to high (top) side shifting established amount, and driving pulley 40 becomes the belt coil diameter of described setting.
The right-hand end that is positioned at described box main body 8g side of described first, second passing shaft 61,62 and detection axle 63 is prolonged wall 8p via right bearing 72a, 73a, 74a by the right side of described box main body 8g respectively and is supporting, and the left end that is positioned at described case lid 8h side is being supported by shaft supporting part 75 via bearing 72b, 73b, 74b respectively.
Described shaft supporting part 75 is configured in the inboard of case lid 8h according to the mode that prolongs wall 8p from the right side of the described box main body 8g of overall width direction outer side covers, and prolongs wall 8p with this right side and form described coil diameter control room b.
Described shaft supporting part 75 releasably is installed in the inboard that the right side prolongs the left-interface face 8i of wall 8p by a plurality of bolts 76, is configured to show out laterally when pulling down described case lid 8h.
The installation mating face 75a of described shaft supporting part 75 with compare the engine main body 8a side (with reference to Fig. 5) of more being partial to overall width direction inboard as box main body 8g with the described left-interface face 8i of the attachment face of case lid 8h.
The hinder marginal part 75d of described shaft supporting part 75 forms the circular-arc of the front edge that approaches driving pulley 40, be formed with the interconnecting part that is communicated with box main body 8g side and case lid 8h side in top, the bottom of this hinder marginal part 75d, particularly, be formed with upper shed 75b, under shed 75c.
Described upper and lower opening 75b, 75c form on the overall width direction case lid 8h side and the box main body 8g side that is communicated with described transmission case 8b, and form in the place ahead of driving pulley 40 cooling air C to be imported from driving pulley 40 sides and move axially changeover part 58 sides.
At the peripheral portion of described upper and lower opening 75b, 75c, tubular separately rib 75e, 75f up and down form according to the mode of extending to described communication direction (overall width direction).And the described rib 75e of going up extends along the edge portion of described hinder marginal part 75 with following rib 75f and becomes continuous face.Like this, described upper and lower opening 75b, 75c constitute a part that cooling air C is imported the cooling air passway of box main body 8g side from case lid 8h side.
In addition, as long as the interconnecting part among the present invention plays the effect of cooling air from case lid 8h side importing box main body 8g side, being not limited to described opening, for example also can be recess.
Circular-arc a plurality of wind feeding blades 40d, the 40e that are formed with predetermined distance spaced apart in the circumferential direction respectively and extend at the inner side surface of the outer side surface of the fixed pulley 40b of described driving pulley 40 and movable sheave 40a along radial direction.
Be fixed each wind feeding blades 40d of pulley 40b of the cooling air C that flows into by cooling air introduction channel 27 attracts, and flows into opening 8m via filter 28 from cooling air and imports in a of belt chamber.A part that imports to the cooling air C in a of belt chamber is fed to the place ahead of driving pulley 40 by the rotation along the direction shown in Fig. 7 arrow r of fixed pulley 40b, front side by this driving pulley 40 imports the inboard of movable pulley 40a by upper and lower opening 75b, 75c, and each the wind feeding blades 40e by this movable pulley 40a is supplied to and moves axially changeover part 58.Cooling air C by moving axially changeover part 58 rearward flows in a of belt chamber, cooling V-type band 42, driven pulley 41, and the cooling air tap hole (not shown) from the rearward end that is formed on transmission case 8b is expelled to the outside simultaneously.
According to present embodiment, because the speed change state switching mechanism 54 of variable control belt coil diameter is configured in the transmission case 8b, therefore can effectively utilize the space on every side of this transmission case 8b, make speed change state switching mechanism 54 miniaturizations configuration, thereby can avoid engine unit 8 to maximize.
Promptly, the front end of transmission case 8b with coil diameter control room b according to belt chamber a continuously and the mode of the extending formation that bulges to oblique front upper place, speed change state switching mechanism 54 is contained in the b of coil diameter control room, according on the overall width direction, disposing this coil diameter control room b with the overlapping mode of the left side wall of cylinder block 8d, therefore can effectively utilize cylinder block 8d left surface idle space and dispose speed change state switching mechanism 54.
In the present embodiment, constitute the right part of first, second passing shaft 61,62 and the detection axle 63 of described speed change state switching mechanism 54 by box main body 8g supporting, by the shaft supporting part 75 supporting left parts that constitute by the parts different with transmission case 8b, therefore when pulling down case lid 8h and carry out the maintenance of V-type band 42 grades of stepless speed changing mechanism 17, each passing shaft 61,62, detection axle 63 can not become cantilever position, thereby can improve operation.In addition, because described shaft supporting part 75 releasably is installed on the described box main body 8g, therefore can easily carry out the maintenance of speed change state switching mechanism 54 by pulling down described shaft supporting part 75.
In the present embodiment, owing to dispose described shaft supporting part 75, therefore can easily carry out the handling operation of shaft supporting part 75 according to the mode that this shaft supporting part 75 is showed out laterally.
In the present embodiment, owing on shaft supporting part 75, be formed with the upper and lower opening 75b, the 75c that are communicated with case lid 8h side and box main body 8g side in the overall width direction, therefore this upper and lower opening 75b, 75c be as importing cooling air C the cooling air passway of box main body 8g side and play a role from case lid 8h side, thereby can improve the cooling of stepless speed changing mechanism 17, speed change state switching mechanism 54.
In the present embodiment, because the peripheral portion at upper and lower opening 75b, 75c is formed with the 75e of rib up and down, the 75f that extends to the overall width direction, therefore can improve the rigidity of upper and lower opening 75b, 75c, can reliably cooling air C importing be comprised moving axially in the changeover part 58 of driving pulley 40 simultaneously, also can improve cooling according to this point.
In the present embodiment, since with speed change state switching mechanism 54 be disposed at driving pulley 40 near, the cooling air C of rotating suction that will be by this driving pulley 40 imports box main body 8g side via upper and lower opening 75b, 75c, therefore can further improve driving pulley 40 and move axially the cooling of changeover part 58.
In addition, in said embodiment, motorcycle is illustrated with the speed change gear that engine unit adopted, still, speed change gear of the present invention is not limited to the motorcycle engine unit, goes for all speed change gears that machinery adopted.

Claims (11)

1. a speed change gear has stepless speed changing mechanism and the storage case that holds this stepless speed changing mechanism, it is characterized in that,
The speed change state switching mechanism of the speed change state of the described stepless speed changing mechanism of configuration change in described storage case, constitute the shaft supporting part of supporting by the parts different as the axle of one of component parts of this speed change state switching mechanism with the box part that constitutes described storage case
Described shaft supporting part has the cover side of the described storage case of connection and the interconnecting part of box main body side.
2. speed change gear as claimed in claim 1 is characterized in that,
Described storage case comprises box main body and releasably is installed in cover on this box main body that described shaft supporting part releasably is installed on the described box main body.
3. speed change gear as claimed in claim 2 is characterized in that described shaft supporting part is configured to expose laterally when pulling down described cover.
4. an engine unit has the described speed change gear of claim 1, it is characterized in that,
Described engine unit comprises: the engine main body that produces output; Export the output shaft of this output; And the storage case that forms with described engine main body;
Wherein, described storage case comprises the box main body with described output shaft through hole and releasably is installed in cover on this box main body,
Described shaft supporting part releasably is installed on the described box main body, has the cover side of the described storage case of connection and the interconnecting part of box main body side.
5. engine unit as claimed in claim 4 is characterized in that described shaft supporting part is configured to expose laterally when pulling down described cover.
6. engine unit as claimed in claim 4 is characterized in that,
End as the axle of one of component parts of described speed change state switching mechanism is supported by described shaft supporting part by bearing, and the other end is supported by described box main body by bearing.
7. engine unit as claimed in claim 4 is characterized in that,
The attachment face of described shaft supporting part is compared with the mating face of cover with described box main body and is partial to the engine main body side more.
8. engine unit as claimed in claim 4 is characterized in that, described interconnecting part is an opening.
9. engine unit as claimed in claim 8 is characterized in that, at the peripheral portion of described opening according to forming rib to the mode of extending as the overall width direction of communication direction.
10. engine unit as claimed in claim 4 is characterized in that, the part of the cooling air passway that described interconnecting part formation cooling air passes through.
11. engine unit as claimed in claim 4 is characterized in that,
Described speed change state switching mechanism be configured in driving pulley with wind feeding blades near, described shaft supporting part has the interconnecting part that wind that the rotation by driving pulley is produced passes through.
CN2008100093091A 2007-02-16 2008-02-18 Gear change mechasnim and engine unit having the same Active CN101245845B (en)

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JP2007036581A JP2008202628A (en) 2007-02-16 2007-02-16 Transmission and engine unit equipped with the same
JP2007036581 2007-02-16
JP2007-036581 2007-02-16

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CN101985898A (en) * 2010-12-10 2011-03-16 隆鑫通用动力股份有限公司 Engine and gearbox mounting structure of micro-farming machine
JP6444240B2 (en) * 2015-03-30 2018-12-26 武蔵精密工業株式会社 Belt type continuously variable transmission

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TWI381115B (en) 2013-01-01

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