CN104696434B

CN104696434B - Internal combustion engine balancer structure

Info

Publication number: CN104696434B
Application number: CN201410741243.0A
Authority: CN
Inventors: 山西辉英; 渡边觉; 高桥仁; 高桥一仁; 小笠原诚; 山崎隼人
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2013-12-10
Filing date: 2014-12-08
Publication date: 2017-04-12
Anticipated expiration: 2034-12-08
Also published as: CN104696434A; BR102014030522B1; BR102014030522A2; IN2014DE03428A; JP2015113872A; JP5908452B2

Abstract

An internal combustion engine balancer structure is provided; a balancer shaft and a crank shaft are assembled on a crankshaft box from a same direction, so positioning is easy, thus improving assembling property; the internal combustion engine (3) comprises the following structures: the crankshaft box (30) being a left-right segmented structure formed by combining a left box body (30L) and a right box body (30R) in a crankshaft (31) direction; a balancer shaft (81) parallel to the crankshaft and supported by a shaft and crossing the left and right box bodies. The internal combustion engine balancer structure is featured in that a left bearing (47L) and a right bearing (47R) are respectively arranged on the left and right side of the crankshaft of the left and right box bodies from combining faces (30a) of the left and right box bodies, and left and right bearings (84L, 84R) of the balancer are provided; counterweights (86L, 86R) are separately arranged on two ends of the balancer shaft relative to the balancer shaft; the crankshaft and the balancer shaft are clamped between the left and right box bodies, and are positioned.

Description

The static organ construction of internal combustion engine

Technical field

The present invention relates to a kind of static organ construction of internal combustion engine that improve assembling.

Background technology

Counter weight is configured in the crankcase of internal combustion engine, and in two outsides of crankcase via Bearing configuration balance weight In the case of, in the past, such as shown in following patent documentations 1 and patent documentation 2, because balance weight and the static organ axle of a side are formed It is integrated, static organ axle must be assembled from the outside of crankcase, so the assembly direction of static organ axle and bent axle is relative Become different in crankcase, the working performance of assembling becomes problem.

Prior art literature

Patent documentation

Patent documentation 1：No. 3082057 publications (Fig. 2～Fig. 4) of Japanese Patent No.

Patent documentation 2：No. 3326696 publications (Fig. 2～Fig. 5) of Japanese Patent No.

The content of the invention

Invent problem to be solved

The problem of the present invention is the static organ construction for providing a kind of internal combustion engine, and static organ axle and bent axle being capable of slave phase Tongfangs To crankcase is assemblied in, its positioning becomes easy, and assembling is improved.

For solving the technical scheme of problem

In order to solve above-mentioned problem, the first invention provides a kind of static organ construction of internal combustion engine, and the internal combustion engine possesses：It is bent Axle box, it is the crankcase of the left box body and right case left and right partition type construction of pairing on crankshaft direction；Static organ axle, its with Bent axle is parallel, is supported by axle across the left box body and right case, the feature of the static organ of internal combustion engine construction be possess from The pairing surface side of the left and right casing be respectively arranged in the left and right bearing of the bent axle of the left and right casing and a left side for static organ axle, Right bearing, left and right balance weight is detachably mounted on two sides of the static organ axle, the bent axle relative to the static organ axle And static organ axle clamp is positioned holding between the left and right casing.

The feature of the second invention is, on the basis of the static organ construction of the described internal combustion engine of the first invention, the balance Device axle is configured in bent axle room in the way of the peripheral part in the face of the counter weight of the bent axle, is provided projectingly on static organ axle The bearing thrust receiving portion of side face is Chong Die with the maximum profile of counter weight in axial view.

The feature of the 3rd invention is, on the basis of the static organ construction of the described internal combustion engine of the second invention, the bent axle The peripheral part of counterweight is rounded, and the bearing thrust receiving portion for being provided with the static organ axle in the peripheral part axially passes through Otch groove portion.

The feature of the 4th invention is, on the basis of the static organ construction of the described internal combustion engine of the 3rd invention, the otch Groove portion is only arranged at a position in the circumference of the peripheral part, combination assembling allow the otch groove portion position and balance weight Position phase matched after mounting.

The feature of the 5th invention is on the basis of the static organ construction of the described internal combustion engine of the 4th invention, to be configured at During the assembling of the driving force transmission change-speed gearing of the crankcase, the otch groove portion doubles as passing through the song along crankshaft direction The backoff portion of the outer diameter part of the change-speed gearing of the peripheral part of axle counterweight.

The feature of the 6th invention is, described left and right on the basis of the static organ construction of the described internal combustion engine of the 5th invention One position being configured on crankshaft direction position with the location overlap of cam chain of balance weight, another balance is reconfigured In the position of the location overlap of the clutch driving gear with the bent axle.

Invention effect

According to the static organ construction of the internal combustion engine of the first invention, because balance weight is separately mounted relative to static organ axle In two sides of static organ axle, therefore, it is possible in advance static organ axle and bent axle are assembled in into the left and right of crankcase from equidirectional The positioning of the left and right directions of casing, static organ axle and bent axle becomes easy, improves assembling.

According to the second invention, in addition to the first The effect of invention, also have the effect that, i.e. can both improve assembling Property, can make the close bent axle of static organ axle again, and electromotor can further miniaturization.

According to the 3rd invention, in addition to the The effect of invention with second aspect, also have the effect that, i.e. due to inciting somebody to action The peripheral part of counter weight is set to circle, it is possible to increase inertia mass, simultaneously because the bearing thrust receiving portion edge of static organ axle Axially through the otch groove portion of peripheral part, therefore, it is possible to make the close bent axle of static organ axle, the miniaturization of internal combustion engine is realized.

According to the 4th invention, in addition to the 3rd The effect of invention, also have the effect that, i.e. due to by bent axle Counter weight is set to the bearing thrust receiving portion of static organ axle, and only in its circumferential direction the otch groove portion at a position could pass through Shape, therefore, by the position being set by the circumference of the bearing thrust receiving portion of otch groove portion, dress can be readily available Phase matched after matching somebody with somebody, assembling is further improved.

According to the 5th invention, in addition to the 4th The effect of invention, also have the effect that, i.e. gear teeth can be made The close bent axle of axle of wheel, the further miniaturization of internal combustion engine.

According to the 6th invention, in addition to the 4th The effect of invention, also have the effect that, i.e. by effectively utilizes Space around each balance weight, contributes to the miniaturization of internal combustion engine.

Description of the drawings

Fig. 1 is the two-wheeled right flank of the internal combustion engine for being equipped with the static organ construction for possessing present embodiment；

Fig. 2 is the profile stretch-out view of the internal combustion engine of II-II directions view in Fig. 1；

Fig. 3 is the right flank of the internal combustion engine of III-III directions view substantially in III-III directions view and Fig. 4 in Fig. 2 Major part profile；

Fig. 4 is the profile stretch-out view of the internal combustion engine 3 of IV-IV directions view in Fig. 3；

Fig. 5 is the position relationship between the crank arm of the bent axle in Fig. 3 and the right bearing thrust receiving portion of static organ axle Schematic diagram；

Fig. 6 (a) is to take out the profilograph represented after the crankshaft-and-connecting-rod in Fig. 2, (b) is b-b directions view in (a) Left side figure；

Fig. 7 (a) is to take out the profilograph represented after the static organ axle in Fig. 4, (b) is b-b directions view in (a) Left side figure, (c) be the c-c directions view drawing in side sectional elevation, (d) be the d-d directions view right side figure；

Fig. 8 (a) is to take out the profilograph represented after the left balance weight in Fig. 4, (b) is b-b directions view in (a) Left side figure；

Fig. 9 (a) is to take out the profilograph represented after the right balance weight in Fig. 4, (b) is b-b directions view in (a) Right side figure；

Figure 10 is the static organ drive gear that represents and balancer driven gear by substantially X-X directions view in Fig. 4 Between relation side view.

Description of reference numerals

1 is two-wheeled

3 internal combustion engines

8 balancer mechanisms

30 crankcases

30L left box bodies

30R right cases

30a involutory surfaces

31 bent axles

The left bent axles of 31L

The right bent axles of 31R

32 cylinder block

33 cylinder head

36 pistons

37 crank arms

37d peripheral parts

The left crank arms of 37L (" counter weight " of the present invention)

The right crank arms of 37R (" counter weight " of the present invention)

38 crank-pins

39 connecting rods

45 crankshaft room

47L (bent axle 31) left bearing

47R (bent axle 31) right bearing

50 speed change rooms

51 main shafts

52 countershafts (output shaft)

53L (main shaft 51) left bearing

53R (main shaft 51) right bearing

54L (countershaft 52) left bearing

54R (countershaft 52) right bearing

56 primary drive gears (" the clutch driving gear " of the present invention)

56a keys

57 primary driven gears

63 driving cam sprocket wheels

80 static organ drive gears

81 static organ axles

81a keyways

82 balancer driven gears

82a keyways

83 matched indicias

84L (static organ axle 81) left bearing

84R (static organ axle 81) right bearing

85L left bearing thrust receiving portions

85R right bearing thrust receiving portions

The left balance weights of 86L

86Ra keyways

88 external spline portions

88a width teeth

89 internal spline portions

89a toothless portion)s

90 keys

100 otch groove portions

101 cut sides

102 overlapping portions

104 gaps

The axle center of X bent axles 31

The axle center of Y static organs axle 81

M1～m5 (main shaft 51) change-speed gearing (" change-speed gearing " of the present invention)

M5a outer diameter parts

C1～c5 (countershaft 52) change-speed gearing (" change-speed gearing " of the present invention)

Mx overlapping portions

Specific embodiment

The static organ construction of the internal combustion engine of one embodiment of the present invention is illustrated based on Fig. 1～Figure 10.

Present embodiment is the situation that internal combustion engine 3 is equipped on two-wheeled 1, in protection scope of the present invention and this explanation In the explanation of book, inferior direction and the vehicle (machine being equipped with two-wheeled 1 in the state of internal combustion engine 3 are all around gone up Dynamic cart) direction it is consistent, and internal combustion engine 3 possesses the internal combustion engine static organ construction of present embodiment.

Arrow FR represents vehicle front in figure, and LH represents vehicle left, and RH represents vehicle right, and UP represents vehicle up direction.

Fig. 1 represents the right flank of two-wheeled the 1 of present embodiment, as shown in figure 1, motor-driven the two of present embodiment In the vehicle frame 2 of wheel car 1, from head tube 20, main truss 21 slightly extends towards rear and obliquely downwards in overall width direction central authorities, Then side's bending still further below, forms main steep dip inclined portion 21a, additionally, from head tube 20, lower framework 22 is oblique in overall width direction mediad The back lower place extends.

The front portion of the crankcase 30 of internal combustion engine 3 is installed on the bottom of lower framework 22 by bolt 23 at upper and lower two positions Support 22a, the rear portion of crankcase 30 is installed on main steep dip inclined portion 21a of main truss 21 by bolt 24 at upper and lower two positions The support 21b of bottom, thus, internal combustion engine 3 is supported on vehicle frame 2.

From the bending section of main truss 21, pair of right and left seat support 25 is while form bent halfway portion, one side is rearward Extend, the rear pole 26 that the central part of the bending section of seat support 25 and main steep dip inclined portion 21a is linked up is carry into vehicle seat Support 25.

In vehicle frame as above 2, pivotal support has front fork 10 in head tube 20, is supported by the lower end axle of front fork 10 Front-wheel 11, bogie car is provided with 12 in the upper end of the pivot of front fork 10, and front end axle is supported on the bottom that is arranged at main truss 21 Back vent 13 on pivot 27 rearward extends, and in the rear end axle of back vent 13 trailing wheel 14 is supported by, back vent 13 central part and after Rear bumper 15 is installed between strut 26.

Fuel tank 16 is provided with the restocking of main truss 21 in the way of across the left and right sides, at the rear of fuel tank 16 car is provided with Seat 17, vehicle seat 17 is supported on seat support 25.

Front shroud 18A covers the top of the lower framework 22 of vehicle frame 2 from the left and right sides, and side cover 18B covers internal combustion engine 3 and vehicle seat 17 Between the left and right sides, back cover 18C cover seat support 25 it is latter half of.

The internal combustion engine 3 of present embodiment is the SOHC formula quartastroke engines of air-cooled single cylinder, in its crankcase 30 Rear portion is integratedly equiped with variator 5 (with reference to Fig. 2, Fig. 3), constitutes so-called power unit, makes its bent axle 31 towards motor-driven The overall width direction of cart 1 is left and right directions, under the attitude for making cylinder somewhat lean forward and erecting, is equipped on two-wheeled 1.

In internal combustion engine 3, bent axle 31 in the lateral direction is rotated freely the earth's axis and is supported on crankcase 30, in crankcase 30 Oblique upper overlap with cylinder block 32 and cylinder head 33 successively, integratedly fastened by post bolt 35 (with reference to Fig. 2), in cylinder head Valve mechanism cover 34, the side of cylinder block 32, cylinder head 33, valve mechanism cover 34 to lean forward slightly to the front from crankcase 30 are coated with 33 Formula is provided projectingly.

Fig. 2 represents the profile stretch-out view of the internal combustion engine 3 of II-II directions view in Fig. 1, as shown in Fig. 2 from crankcase In 30 cylinder block 32 for projecting obliquely upward, built with cylinder jacket 32a for being slidably embedded in piston 36, to the song of crankcase 30 It is prominent in axle room 45.

Connecting rod 39 is by the piston 36 moved back and forth in cylinder jacket 32a and the left and right crank arm for being erected at bent axle 31 The crank-pin 38 of " counter weight " of the present invention () between 37L, 37R links, the rotation driving bent axle according to the motion of piston 36 31。

Bent axle 31 and connecting rod 39 in Fig. 2 is taken out, (a) in Fig. 6 is represented.Bent axle 31 is by left bent axle 31L and right bent axle 31R is constituted, by the left crank arm 37L for being integrally formed at the right-hand member of left bent axle 31L and the left end for being integrally formed at right bent axle 31R Right crank arm 37R connections, are embedded in crank-pin 38, make left and right bent axle 31L, 31R have same bent axle heart X.

As shown in (b) of b-b directions view in Fig. 6 (a), the peripheral part 37d of left and right crank arm 37L, 37R is rounded, And a peripheral part 37d position in the circumferential is provided with otch groove portion described later 100.

In the bottom of cylinder head 33 and piston 36 top, formed combuster 40.

It is provided with towards the spark plug 46 in combustor 40 in the upper wall of combustor 40, drives (the ginseng of inlet and outlet valve 43,44 According to Fig. 3) valve activator 6 be arranged at cylinder head 33, the inlet and outlet mouth opening of 43,44 pairs of combustor 40 of above-mentioned inlet and outlet valve 41st, 42 it is opened and closed.

As shown in figure 1, the air inlet pipe 71 rearward extended from cylinder head 33 connects via carburator 72 with air filter 73 Knot.

The exhaustor 74 extended forwards from cylinder head 33 bends downwards, and then rearward bends, along crankcase 30 Below extend rearward and on the right side, link with the acoustic filter 75 on the right side for being configured at trailing wheel 14.

As shown in Fig. 2 the crankcase 30 of internal combustion engine 3 is that the left box body 30L and right case 30R to be formed is cast by aluminium alloy In involutory surface 30a pairings, left and right segmentation that is joined integrally by multiple bolts and constituting is constructed.

The central part of crankcase 30 is internally formed crankshaft room 45, in left and right casing 30L, 30R, respectively from involutory surface 30a sides Left and right bearing 47L, 47R of bent axle 31 be installed, bent axle 31 by its left and right crank arm 37L, 37R being clipped in left and right casing Mode between 30L, 30R is positioned, and is rotatably kept.

In addition, the rear interior of crankcase 30 forms speed change room 50, main shaft 51 and countershaft 52 are abreast provided with bent axle 31, In left and right casing 30L, 30R, left and right bearing 53L, 53R of the main shaft 51 of variator 5 are installed respectively from involutory surface 30a sides, Main shaft 51 is in the way of its change-speed gearing (" change-speed gearing " of the present invention) m1～m5 is clipped between left and right casing 30L, 30R Positioning, is rotatably kept, and then, left and right bearing 54L, 54R of countershaft 52 be installed, countershaft 52 is with by its gear teeth The mode that wheel (" change-speed gearing " of the present invention) c1～c5 is clipped between left and right casing 30L, 30R is positioned, and is rotatably protected Hold.

Axle is supported in the change-speed gearing m1～m5 and axle of main shaft 51 and is supported in the change-speed gearing c1～c5 of countershaft 52 always to be nibbled Close, constitute variator 5.

Install in cylinder head 33 and be accommodated with valve activator 6, the valve activator 6 is by the intake valve 43, (ginseng of air bleeding valve 44 According to Fig. 3) be opened and closed valve drive cam shaft 61, inverted cam sprocket wheel 62, intake rocker 65, exhaust rocker arm 66 of driving etc. and Their the grade valve of supporting member 67 drive component is constituted.

Cam chain room 32b, 33b are provided with the left side of cylinder block 32 and cylinder head 33, it receives the driving of driving valve The cam chain 64 of mechanism 6.

Inverted cam sprocket wheel 62 and the drive for being flush-mounted in bent axle 31 in the valve drive cam shaft 61 for being flush-mounted in valve activator 6 Between moving cam sprocket wheel 63, setting up through cam chain room 32b, 33b has cam chain 64, and valve drive cam shaft 61 is with bent axle 31 1/2 rotating speed rotated, swing intake rocker 65 and exhaust rocker arm 66, respectively with opportunity for specifying to inlet and outlet valve 43rd, 44 it is opened and closed driving.

In the part that the left box body 30L of the ratio crankcase 30 of bent axle 31 is projected to the left, except being provided with driving cam sprocket wheel Beyond 63, AC electromotors 48 are also equipped with, cover outside the opening of left box body 30L and be fastened with left box body cover 49L.

On the other hand, the part for projecting to the right in the right case 30R of the ratio crankcase 30 of bent axle 31, it is embedding via key 56a Conjunction has static organ drive gear 80 and primary drive gear (" clutch driving gear " of the present invention) 56, right case 30R's Opening outside covers and is fastened with right case cover 49R.

In the right side that the right case 30R of the ratio crankcase 30 of main shaft 51 is projected to the right, multi-disc friction type speed change is provided with Clutch 55.

The clutch outer 55a of speed change clutch 55 is supported on primary driven gear 57 via buffer unit, the primary from Moving gear 57 is rotatably supported in main shaft 51 by axle, in clutch outer 55a and the clutch for being integrally embedded in main shaft 51 Multiple clutch disc are installed between inner disc 55b, are turned off and is connected by the driving of compression member 55c.

Primary driven gear 57 is engaged with the primary drive gear 56 for being flush-mounted in bent axle 31, the rotary power of bent axle 31 via The primary drive gear 56 of the side of bent axle 31, the primary driven gear 57 of the side of speed change clutch 55 are delivered to speed change clutch 55, but Speed change clutch 55 is configured to, and the rotary power of bent axle 31 is not delivered to into variator 5 in the gear switching of variator 5, and As soon as the gear switching of variator 5 terminates, the rotary power of bent axle 31 is delivered to into the main shaft 51 of variator 5.

Countershaft 52 to the left the left box body 30L of insertion crankcase 30 and it is protruding to the outside, become the final output of internal combustion engine 3 Axle, being fitted together in protruding parts spline has output chain gear 28.

It is hung on the drive chain 29 of output chain gear 28 to be erected on the driven sprocket 14a of the side of trailing wheel 14 (with reference to Fig. 1), structure Into chain transmission mechanism, to trailing wheel 14 power is transmitted.

Fig. 3 represents the right flank major part profile of the internal combustion engine 3 of substantially III-III directions view in Fig. 2, such as Fig. 3 Shown, the crank arm 37 (the right crank arm 37R of diagram, left crank arm 37L is similarly) of the bent axle 31 of present embodiment is in bent axle Axle center X centered on circle, possess：From arm 37a, its both sides that the axle center X of bent axle extends to the installation portion of crank-pin 38 Thinner wall section 37b in portion, be formed at crank-pin 38 installation portion opposition side half-round and become the heavy section of the secondary counterweight of bent axle 37c。

So, become circular by peripheral part 37d, left and right crank arm 37L, 37R can improve inertia mass.

In crankcase 30, the speed change room 50 at rear portion built with variator 5 each axle 51,52, and with the phase of speed change room 50 Front toss about, bent axle 31, is provided with balancer mechanism 8.

Balancer mechanism 8 possesses and is abreast configured at the static organ axle 81 in overall width direction with bent axle 31, the two point in such as Fig. 3 Shown in line, the static organ drive gear 80 for being embedded in bent axle 31 and the balancer driven gear 82 that is embedded in static organ axle 81 with The mutual rotatable phase engagement of regulation.

Therefore, for represent regulation mutual rotational phase position pairing labelling 83 accordingly mark two gears 80, 82 position of engagement (with reference to Figure 10).

Additionally, balancer driven gear 82 and static organ drive gear 80 are with diameter and the same number of teeth.

Fig. 4 represents the profile stretch-out view of the internal combustion engine 3 of IV-IV directions view in Fig. 3, as shown in figure 4, in crankcase 30 Forward interior be provided with balancer mechanism 8, in left and right casing 30L, 30R, respectively static organ axle is installed from involutory surface 30a sides 81 left and right bearing 84L, 84R.

Static organ axle 81 in Fig. 4 is taken out, (a) in Fig. 7 is represented, such as shown in Fig. 7 (a), on static organ axle 81, Its side face is annularly integrally formed with bearing thrust receiving portion 85L, 85R of left and right, and bearing thrust receiving portion 85L, 85R is projected Arrange, formed towards left and right step.

Static organ axle 81 make its left and right bearing thrust receiving portion 85L, 85R respectively with the inner ring of left and right bearing 84L, 84R Abut, in the way of being clipped between left and right casing 30L, 30R holding is positioned.

Additionally, the static organ axle 81 of Fig. 3 represents the right bearing thrust for possessing cut sides described later 101 (with reference to (d) of Fig. 7) The section of receiving portion 85R.

On static organ axle 81, via left bearing 84L prominent to the left-external side of left box body 30L left axle side, pass through Spline is fitted together to and mutually can not rotatably be provided with left balance weight (" balance weight " of the present invention) 86L.

In the external thread part 81La (with reference to Fig. 7) of the left axle side of static organ axle 81, be screwed with nut 87L, with balance Between left bearing thrust receiving portion 85L of device axle 81, tighten and be fixed with left bearing 84L and left balance weight 86L.

Additionally, the end face of b-b directions view is indicated on Fig. 7 (b) in Fig. 7 (a), such as shown in Fig. 7 (b), in static organ axle 81 external spline portion 88, in axle circumference a position has the wide tooth 88a for rolling broadening.

On the other hand, left balance weight 86L in Fig. 4 is taken out, is represented in Fig. 8 (b), such as shown in Fig. 8 (b), in left balance The internal spline portion 89 of weight 86L, has the toothless portion) 89a for lacking two teeth at a circumferential position of inner circumferential.Additionally, left balance weight The toothless portion) 89a of 86L is set as thering is the rotary phase relation of regulation with the counterweight part 86Lb (with reference to Fig. 8) of balance weight 86L.

Therefore, static organ axle 81 can only just be carried out with left balance weight 86L in the wide tooth 88a positions consistent with toothless portion) 89a Spline is fitted together to, therefore, left balance weight 86L is pacified by sets itself relative to static organ axle 81 as in the way of the rotatable phase for specifying Dress.

In addition, as shown in figure 4, on static organ axle 81, via right bearing 84R to the right protruding outside of right case 30R Right axle side be arranged with balancer driven gear 82 and right balance weight (" balance weight " of the present invention) 86R, closed not by bond Can mutually be rotationally mounted on static organ axle 81.

External thread part 81Ra (with reference to Fig. 7) in the right axle side of static organ axle 81 is screwed with nut 87R, with static organ Between right bearing thrust receiving portion 85R of axle 81, tighten and be fixed with right bearing 84R, balancer driven gear 82 and right balance weight 86R。

Additionally, as shown in Fig. 7 (c), in the right axle side of static organ axle 81, in axle circumference a position, break-through sets It is equipped with keyway 81a.

On the other hand, right balance weight 86R in Fig. 4 is taken out, is represented in Fig. 9 (b), such as shown in Fig. 9 (b), in right balance In the axis hole of weight 86R, a position in inner circumferential circumference has keyway 86Ra.

In addition, as shown in figure 4, in the axis hole of balancer driven gear 82, a position in inner circumferential circumference also sets There is keyway 82a, the keyway 82a of keyway 81a, balancer driven gear 82 in static organ axle 81, the keyway of right balance weight 86R In 86Ra, a common key 90 is embedded with.Additionally, the keyway 86Ra of right balance weight 86R is set to and right balance weight 86R Counterweight part 86Rb (with reference to Fig. 9) has the rotary phase relation of regulation.

Therefore, balancer driven gear 82 and right balance weight 86R relative to static organ axle 81 with sets itself as regulation The mode of rotatable phase is mounted.

As described above, in the present embodiment, the left and right of the rotatable phase for being set as specifying relative to static organ axle 81 is put down Weight 86L, 86R are detachably installed.

Therefore, in the left and right two axial ends side of static organ axle 81, it has been separately mounted relative to static organ axle 81 left and right flat Weight 86L, 86R, thus install left and right balance weight 86L, 86R, balancer driven gear 82 and static organ drive gear 80 it Before, in advance static organ axle 81 and bent axle 31 can be assembled in into left and right casing 30L, 30R of crankcase 30 from equidirectional, balance Device axle 81 and bent axle 31 are clipped between left and right casing 30L, 30R, easily realize the positioning of left and right directions, improve assembling.

In addition, work as making balancer driven gear 82 engage with the mutual rotatable phase for specifying with static organ drive gear 80 When, bent axle 31 and left and right balance weight 86L, 86R just have the mutual rotary phase relation of regulation, on the other hand, due to static organ Drive gear 80 and balancer driven gear 82 are the same numbers of teeth of same diameter, and the mutual rotatable phase engagement to specify, therefore logical The rotation of bent axle 31 is crossed, static organ axle 81 together can round about be revolved with same rotational speed with left and right balance weight 86L, 86R Turn, therefore, it is possible to the vibration that causes of rotation of balance crankshaft 31.

Here, Fig. 5 is to show schematically that the left crank arm 37L (right crank arm 37R is similarly) of the bent axle 31 in Fig. 3 is peaceful The figure of the position relationship between right bearing thrust receiving portion 85R of weighing apparatus axle 81.

In the present embodiment, static organ axle 81 is in the way of in the face of the periphery of left and right crank arm 37L, 37R of bent axle 31 Abreast it is configured in crankshaft room 45 with bent axle 31, but is provided projectingly on the left and right bearing thrust of the axle side face of static organ axle 81 Rounded maximum profile of receiving portion 85L, 85R with left and right crank arm 37L, 37R in axial view is peripheral part 37d (half Footpath r1) overlap, produce overlapping portion 102.

Therefore, it is possible to make the close bent axle 31 of static organ axle 81, smallerization of internal combustion engine 3 is made.

But, if directly axially moved bent axle 31 and static organ axle 81 from involutory surface 30a sides, it is installed on successively During such as left box body 30L of the side of crankcase 30, in the present embodiment, because left and right crank arm 37L, 37R are rounded, institute So that its peripheral part 37d and left and right bearing thrust receiving portion 85L, 85R can be caused to interfere.

In this regard, in the present embodiment, in the peripheral part 37d of left and right crank arm 37L, 37R, a portion in the circumferential Position is provided with the otch groove portion 100 that bearing thrust receiving portion 85L, 85R of static organ axle 81 is extended axially through.

That is, the distance between the axle center X of bent axle 31 and the axle center Y of static organ axle 81 are set as d1 as shown in figure 5, working as, if left, The radius of the peripheral part 37d of right crank arm 37L, 37R is r1, if the radius of bearing thrust receiving portion 85L, 85R is r2,

Become d1 ＜ (r2 of r1 ten), produce the overlapping portion 102 in above-mentioned axial view, the relation in interfering, But in the peripheral part 37d of left and right crank arm 37L, 37R, otch groove portion 100 (with reference to Fig. 3, Fig. 4, Fig. 6), the groove of the notch are set The depth that portion 100 has with the distance of the axle center Y of static organ axle 81 is d2, and it is wide defined in the circular arc with imaginary circle 103 Degree,

And at least it is set to d2 ＞ r2, thus the gap 104 with (d2-r2),

Wherein, imaginary circle 103 is centered on the axle center Y of static organ axle 81, with the radius r3 more than r2.

Therefore, by the way that the peripheral part 37d of left and right crank arm 37L, 37R is set to into circle, it is possible to increase inertia mass, together When can make left and right bearing thrust receiving portion 85L, 85R of static organ axle 81 in the otch groove portion of left and right crank arm 37L, 37R Extend axially through with not interfering in 100, it is possible to the close bent axle 31 of static organ axle 81 is made, so as to realize internal combustion engine 3 Further miniaturization.

In addition, as shown in figure 5, right bearing thrust receiving portion 85R in static organ axle 81 is formed with relative to circular side face Become the cut sides 101 (with reference to Fig. 3, Fig. 4, Fig. 7) of string, the axle center Y for making anomaly weighing apparatus axle 81 meets d3 ＜ r2 apart from d3.

Therefore, when the rotation position for making static organ axle 81 coordinates otch groove portion 100, the right bearing thrust of static organ axle 81 is allowed When the cut sides 101 of receiving portion 85R are towards otch groove portion 100, mutual gap becomes maximum, passing through on mutual direction of principal axis Easily, easily assembling.

Further, since otch groove portion 100 is only arranged at one in the circumference of the peripheral part 37d of left and right crank arm 37L, 37R Individual position, and on static organ axle 81 to fix rotatable phase in the way of left and right balance weight 86L, 86R is installed, therefore, cutting When the cut sides 101 of right bearing thrust receiving portion 85R of mouth groove portion 100 and static organ axle 81 are relative, i.e. in cut sides 101 When in otch groove portion 100, if the rotatable phase position that regulation is located at relative to bent axle 31 with left and right balance weight 86L, 86R The mode put forms cut sides 101, then as described above, in the mutual alignment that can easily assemble, the otch groove portion 100 after assembling I.e. the rotatable phase of the rotatable phase of bent axle 31 and left and right balance weight 86L, 86R can be matched.

That is, because otch groove portion 100 is only arranged at one in the circumference of the peripheral part 37d of left and right crank arm 37L, 37R Position, is carried out in the way of the position of the position of otch groove portion 100 and left and right balance weight 86L, 86R after mounting phase matched Combination assembling, also, the shape of left and right crank arm 37L, 37R of bent axle 31 is set to the bearing thrust of static organ axle 81 The otch groove portion 100 at a position can be passed through receiving portion 85L, 85R only in the circumference of left and right crank arm 37L, 37R, because This, by setting through the rotational phase position in the circumference of bearing thrust receiving portion 85L, 85R of otch groove portion 100, can hold Phase matched after easily being assembled, assembling is further enhanced.

If as described above, static organ axle 81 being placed in into the rotational phase position of regulation relative to bent axle 31 and song is assembled in Axle box 30, then such as by substantially X-X directions view in Fig. 4 representing static organ drive gear 80 and balancer driven gear 82 Between relation Figure 10 shown in, in the right part that static organ drive gear 80 is fixed on bent axle 31 using key, will using key When balancer driven gear 82 is fixed on the right part of static organ axle 81, it is imprinted at static organ drive gear 80 and static organ is driven The matched indicia 83 of the rotatable phase of gear 82 is just naturally located at extremely near position, can easily make two gears 80,82 It is properly engaged with, bent axle 31 and static organ axle 81 are that the rotatable phase that left and right balance weight 86L, 86R can be set to specify is closed System.

In addition, as shown in figure 3, in the present embodiment, the peripheral part 37d of left and right crank arm 37L, 37R is in axial view In with the change-speed gearing m1～m5 of the main shaft 51 of close bent axle 31 in largest outside diameter change-speed gearing m5 outer diameter part m5a produce Overlapping portion mx (with reference to Fig. 2).

Thereby, it is possible to make main shaft 51 (" axle of change-speed gearing " of the present invention) near bent axle 31, internal combustion engine 3 is further small-sized Change, but in assembling, need the interference for avoiding change-speed gearing m5 and left and right crank arm 37L, 37R.

In this regard, in the present embodiment, in the change for being installed on the driving force transmission main shaft 51 being configured on crankcase 30 During the assembling of fast gear m1～m5, otch groove portion 100 is as the periphery for passing through left and right crank arm 37L, 37R along the direction of bent axle 31 The backoff portion of the outer diameter part of the change-speed gearing m1～m5 of portion 37d.

In this case, axially move in the main shaft 51 that will be provided with change-speed gearing m1～m5 and install When crankcase 30, if the otch groove portion 100 for making left and right crank arm 37L, 37R turns to position closest to main shaft 51, Otch groove portion 100 becomes backoff portion, and the outer diameter part m5a that can make the change-speed gearing m5 with maximum outside diameter passes through left and right crank The otch groove portion 100 of arm 37L, 37R, assembling becomes easy, and as described above, can make the close bent axle 31 of main shaft 51, internal combustion The further miniaturization of machine 3.

Additionally, as shown in figure 4, in the direction position of bent axle 31, left balance weight 86L is configured in the position weight with cam chain 64 Folded position, right balance weight 86R is configured in the position with the location overlap of the primary drive gear 56 of bent axle 31.

Therefore, the space of the respective surrounding of left balance weight 86L and right balance weight 86R is efficiently utilized, contributes to internal combustion The miniaturization of machine 3.

Below, the dress referring especially to Fig. 2 and Fig. 4, to the static organ construction of the internal combustion engine of present embodiment as above One example of sequence ligand is briefly described.

First, involutory surface 30a is made up to place the left box body 30L of crankcase 30, by a left side of the left bent axle 31L of bent axle 31 Down, via left bearing 47L, insertion is installed on left box body 30L, then makes the otch groove portion of left and right crank arm 37L, 37R for end 100 towards static organ axle 81 installation site.

Afterwards, by the left part of static organ axle 81 down, via left bearing 84L, insertion is installed on left box body 30L.Now, By the gap 104 of above-mentioned (d2-r2), left bearing thrust receiving portion 85L of static organ axle 81 can axially pass through The otch groove portion 100 (with reference to Fig. 5) of left and right crank arm 37L, 37R.

After the installing of static organ axle 81, rotary balancer axle 81 so as to the groove of the notch of the cut sides 101 towards crankshaft side Portion 100 and position, carry out phase matched.

In the case where static organ axle 81 is arranged on into left box body 30L prior to bent axle 31, if making static organ axle 81 The cut sides 101 of right bearing thrust receiving portion 85R are towards in the state of bent axle 31, while making cutting for left and right crank arm 37L, 37R Mouthful groove portion 100 towards static organ axle 81 cut sides 101, while be axially moveable bent axle 31 installed, then by the groove of the notch Larger gap between portion 100 and cut sides 101, can more easily be installed, while can also obtain phase matched.

Thereafter, in the case where the main shaft 51 for possessing change-speed gearing m1～m5 of variator 5 is assembled in into left box body 30L, As shown in Figure 4, because left and right crank arm 37L, 37R are between left and right bearing thrust receiving portion 85L, 85R of static organ axle 81 It is rotatable, so if making otch groove portion 100 turn to the position closest to main shaft 51, it becomes possible to make with maximum outside diameter Change-speed gearing m5 the outer diameter part m5a otch groove portions 100 that pass through left and right crank arm 37L, 37R, easily carry out main shaft 51 Assembling (with reference to Fig. 2).

The otch groove portion 100 of turning crankshaft 31 so as to position towards the cut sides 101 of static organ axle 81, enter line phase Matching.

In the case where the main shaft 51 by variator 5 is arranged on left box body 30L prior to bent axle 31, if while making bent axle 31 Left and right crank arm 37L, 37R otch groove portion 100 towards main shaft 51, while be axially moveable bent axle 31 being installed, then can The outer diameter part m5a of the change-speed gearing m5 with maximum outside diameter is enough made by the otch groove portion 100 of left and right crank arm 37L, 37R, is held Changing places carries out the assembling of main shaft 51.

Afterwards, when static organ axle 81 is arranged on into left box body 30L, turning crankshaft 31 makes left and right crank arm 37L, 37R Otch groove portion 100 towards static organ axle 81 installation site.

Thereafter, static organ axle 81 is installed, by the gap 104 of above-mentioned (d2-r2), the left bearing of static organ axle 81 is pushed away Power receiving portion 85L can extend axially through the otch groove portion 100 (with reference to Fig. 5) of left and right crank arm 37L, 37R.

In the above described manner, it is mounted with left box body 30L after main shaft 51 of bent axle 31, static organ axle 81, variator 5 etc., Each axle 31,81,51 etc. is installed on into the right case 30R from the crankcase 30 of upper covering via right bearing 47R, 84R, 53R etc..

Then, left box body 30L and right case 30R is linked into fastening, shape all-in-one-piece crankcase 30.

Afterwards, in the right axle end of the bent axle 31 projected upward than right case 30R, installation static organ drive gear 80, Primary drive gear 56 etc..

In the right axle end of static organ axle 81, balancer driven gear 82, right balance weight 86R etc. are installed.

In the right axle end of main shaft 51, primary driven gear 57, speed change clutch 55 etc. are installed.

Now, bent axle 31 and static organ axle 81 are aspectant by being located at respective otch groove portion 100 and cut sides 101 Position, has completed phase matched substantially, but in order to by static organ drive gear 80 and balancer driven gear 82 correctly It is set as the rotary phase relation for specifying and engages, as shown in Figure 10 (also referring to Fig. 3), in the static organ drive gear of bent axle 31 80 and static organ axle 81 balancer driven gear 82 on, matched indicia 83 is marked in aspectant position.

Therefore, it is possible to easily be aligned to the position of matched indicia 83, make static organ drive gear 80 and static organ from Moving gear 82 is engaged, and so as to they be fitted together, bent axle 31 and static organ axle 81 are being again set correctly mutual rotation It is arranged in crankcase 30 in the state of phase relation.

In the right axle end of the main shaft 51 of variator 5, primary driven gear 57, speed change clutch 55 etc. are installed.

Afterwards, overturning crankcase 30 makes left box body 30L upper, on a left side for the bent axle 31 projected upward than left box body 30L Shaft end installs AC electromotors 48 etc., left balance weight 86L etc. is installed in the left axle end of static organ axle 81, in the left axle of countershaft 52 End is installed by output chain gear 28 etc..

Additionally, the assemble sequence for more than, in the situation of the right case 30R sides that each axle is first arranged on crankcase 30 It is same.

Below, the feature of the static organ construction 8 of the internal combustion engine 3 of the present embodiment of the description above is concluded.

That is, a kind of internal combustion engine 3, it possesses crankcase 30 and static organ axle 81, and the crankcase 30 is left box body 30L and the right side Casing 30R is to the left and right partition type construction being combined on the direction of bent axle 31, and the static organ axle 81 is parallel with bent axle 31, horizontal Across left box body 30L and right case 30R and supported by axle, the internal combustion engine 3 possesses the involutory surface 30a from left and right casing 30L, 30R Side is respectively arranged in left and right bearing 47L, 47R of the bent axle 31 of left and right casing 30L, 30R and the left and right bearing of static organ axle 81 84L, 84R, left and right balance weight 86L, 86R is detachably mounted to two sides of static organ axle 81 relative to static organ axle 81, bent Axle 31 and static organ axle 81 are clipped between left and right casing 30L, 30R and are positioned holding.

Therefore, because left and right balance weight 86L, 86R is detachably mounted to static organ axle 81 relative to static organ axle 81 Two sides, thus can in advance by static organ axle 81 and bent axle 31 be assembled in from equidirectional crankcase 30 left and right casing 30L, The positioning of the left and right directions of 30R, static organ axle 81 and bent axle 31 is easily carried out, and improves assembling.

Further, since static organ axle 81 is in the way of the peripheral part 37d in the face of left and right crank arm 37L, 37R of bent axle 31 It is configured in crankshaft room 45, is provided projectingly on bearing thrust receiving portion 85L, 85R of side face of static organ axle 81 in axial view In it is Chong Die with the maximum profile of left and right crank arm 37L, 37R, therefore assembling can be improved, static organ axle 81 can be made again to be close to song Axle 31, the further miniaturization of internal combustion engine 3.

Further, since the peripheral part 37d of left and right crank arm 37L, 37R is rounded, and static organ is provided with peripheral part 37d The otch groove portion 100 that bearing thrust receiving portion 85L, 85R of axle 81 is extended axially through, thus by by left and right crank arm 37L, The peripheral part 37d of 37R is set to circle, it is possible to increase inertia mass, while bearing thrust receiving portion 85L, 85R of static organ axle 81 The otch groove portion 100 of peripheral part 37d can be extended axially through, therefore, it is possible to make the close bent axle 31 of static organ axle 81, so as to realize The miniaturization of internal combustion engine 3.

In addition, otch groove portion 100 is only defined a position in the circumference of peripheral part 37d, combination assembling allows otch groove portion The position of 100 position and left and right balance weight 86L, 86R phase matched after mounting.

Therefore, because left and right crank arm 37L, 37R of bent axle 31 are set to into the bearing thrust receiving portion of static organ axle 81 85L, 85R shape that only in its circumferential direction the groove of the notch 100 at a position could be passed through, therefore, by setting through the groove of the notch Position in the circumference of bearing thrust receiving portion 85L, 85R in portion 100, the phase matched that can be readily available after assembling, dress Further improve with property.

Further, since when the assembling of driving force transmission change-speed gearing m1～m5 of crankcase 30 is configured at, the groove of the notch Change-speed gearing m5 of the portion 100 as the maximum gauge of the peripheral part 37d for passing through left and right crank arm 37L, 37R along the direction of bent axle 31 Outer diameter part m5a backoff portion, therefore, it is possible to make the close bent axle 31 of the main shaft 51 of change-speed gearing m1～m5, internal combustion engine 3 is further Miniaturization.

And, left balance weight 86L is configured in the position with the location overlap of cam chain 64 on the direction position of bent axle 31, Right balance weight 86R is configured in the position with the location overlap of the primary drive gear 56 of bent axle 31, therefore, by effectively utilizes Space around left and right balance weight 86L, 86R, contributes to the miniaturization of internal combustion engine 3.

More than, the balancer mechanism of the internal combustion engine of an embodiment of the invention is illustrated, but the present invention Form is not limited to above-mentioned embodiment, in the thought range of the present invention, comprising the reality implemented with diversified form Mode is applied, this is self-evident.

For example, internal combustion engine of the invention is not limited to the internal combustion engine of embodiment, can be diversified internal combustion engine, only If possessing the internal combustion engine of the essential condition of the first invention.

In addition, for convenience of description, by the configuration of the left and right of each equipment be recorded into the configuration of diagram but it is also possible to be with it is upper The heterochiral configuration of configuration shown in embodiment is stated, the configuration is also included in the present invention.

Claims

1. a kind of static organ of internal combustion engine is constructed, it is characterised in that

The internal combustion engine possesses：

Crankcase (30), the crankcase (30) is a left side for left box body (30L) and right case (30R) pairing on bent axle (31) direction Right partition type construction；

Static organ axle (81), the static organ axle (81) is parallel with bent axle (31), across the left box body (30L) and right case (30R) and by left box body (30L) and right case (30R) support,

The bent axle (31) with counter weight (37L, 37R),

The static organ of the internal combustion engine is constructed and is characterised by,

Possess from involutory surface (30a) side of the left and right casing (30L, 30R) and be separately mounted to the left and right casing (30L, 30R) Bent axle (31) left and right bearing (47L, 47R) and the left and right bearing (84L, 84R) of static organ axle (81),

Left and right balance weight (86L, 86R) is detachably mounted on the static organ axle (81) relative to the static organ axle (81) Two sides, the bent axle (31) and static organ axle (81) are clipped between the left and right casing (30L, 30R) and are positioned holding,

The static organ axle (81) is in the way of the peripheral part (37d) in the face of the counter weight (37L, 37R) of the bent axle (31) It is configured in crankshaft room (45), is provided projectingly on the bearing thrust receiving portion (85L, 85R) of side face of static organ axle (81) in axle It is Chong Die with the maximum profile of counter weight in direction view.

2. the static organ of internal combustion engine as claimed in claim 1 is constructed, it is characterised in that

The peripheral part (37d) of the counter weight (37L, 37R) is rounded, and is provided with the balance in the peripheral part (37d) The otch groove portion (100) that the bearing thrust receiving portion (85L, 85R) of device axle (81) is extended axially through.

3. the static organ of internal combustion engine as claimed in claim 2 is constructed, it is characterised in that

The otch groove portion (100) is only arranged at a position in the circumference of the peripheral part (37d), and combination assembling allows this to cut The position of mouthful groove portion (100) and the position of balance weight (86L, 86R) phase matched after mounting.

4. the static organ of internal combustion engine as claimed in claim 3 is constructed, it is characterised in that

When the assembling of driving force transmission change-speed gearing (m1～m5) of the crankcase (30) is configured at, the otch groove portion (100) as the change-speed gearing of the peripheral part (37d) for passing through the counter weight (37L, 37R) along bent axle (31) direction (m5) backoff portion of outer diameter part (m5a).

5. the static organ of internal combustion engine as claimed in claim 4 is constructed, it is characterised in that

One of the left and right balance weight (86L, 86R) is configured in and cam chain (64) on bent axle (31) direction position The position of location overlap, another balance weight is configured in the position weight with clutch driving gear (56) of the bent axle (31) Folded position.