CN101684854B - Cam chain tension pivot mounting structure of internal combustion engine - Google Patents
Cam chain tension pivot mounting structure of internal combustion engine Download PDFInfo
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- CN101684854B CN101684854B CN2009101746422A CN200910174642A CN101684854B CN 101684854 B CN101684854 B CN 101684854B CN 2009101746422 A CN2009101746422 A CN 2009101746422A CN 200910174642 A CN200910174642 A CN 200910174642A CN 101684854 B CN101684854 B CN 101684854B
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- chain tension
- combustion engine
- mounting structure
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Abstract
The invention provides a cam chain tension pivot mounting structure of an internal combustion engine, which can realize reduction of the number of the components and light weight. In the cam chain tension pivot mounting structure of an internal combustion engine, a push plug (61) which pushes radially a rolling bearing of a crankshaft (40) is arranged nearby a cam chain tension pivot (60) which is positioned by a spring socket plate (63) for socketing a base end of a spring component (62) applying force on the push plug (61).
Description
Technical field
The present invention relates to a kind of the cam chain tension guiding element that applies tension to cam chain carried out the mounting structure of the cam chain tension pivot of axle supporting, this cam chain is with the valve driving system of transmission of power to internal-combustion engine.
Background technique
Known have a following structure, promptly shakes the cam chain tension guiding element of ground axle suspension freely by the cam chain tension pivot, utilizes stretcher to be applied in active force and push cam chain and apply tension force (for example with reference to patent documentation 1).
Patent documentation 1: (Japan) spy opens the 2005-106160 communique
In patent documentation 1; Following structure is disclosed: in the Fig. 2 as the sectional drawing of internal-combustion engine; Closed chain 52 is set up in and is embedding the driving sprocket wheel of installing 51 on the bent axle 6 and embedding on the valve camshaft 50 between the driven sprocket of installing 53; The cam chain tension guiding element that sets along closed chain 52 is by the supporting of cam chain tension pivot shaft, utilizes stretcher to be applied in active force and pushes closed chain 52 and apply active force.
In this internal-combustion engine, cylinder erects from crankcase with leaning forward a little, and cam chain tension pivot shaft supporting edge is the lower end of the cam chain tension guiding element of lower direction extension haply, and this cam chain tension pivot is positioned at the rear of driving sprocket wheel 51.
And chain comes off and prevents that plate 54 from covering the part on the driving sprocket wheel 51 that is wound on of closed chain 52 from the below, and this chain comes off and prevents plate 54 front end of extended extension part significantly certainly, and the cam chain tension pivot is positioned and with its supporting.
In addition; Above driving sprocket wheel 51; The spring that between the front side portion of closed chain 52 and rear sides, disposes the cardinal extremity of accepting helical spring 31 is provided with plate 32, and the pushing plug 30 that these helical spring 31 subtends are radially pushed the outer shroud 23 of ball bearing BB applies active force, this ball bearing BB axle supporting crankshaft 6.
Because what the cam chain tension pivot was positioned is that chain comes off and prevents plate 54, therefore, chain comes off and prevents that plate 54 from forming towards the extended especially bigly extension part of cam chain tension pivot, prevents plate 54 maximizations so cause chain to come off.
Because coming off, chain prevents that plate 54 from maximizing, thus the weight increase, and, for being come off, chain prevents that plate 54 is fixed in crankcase, need utilize the bolt more than two to link at least, thereby cause number of components to increase, and weight also further increases.
Summary of the invention
The present invention makes in view of the above problems, and its purpose is to provide a kind of cam chain tension pivot mounting structure of internal-combustion engine, and it can seek the minimizing and the lightweight of number of components.
To achieve these goals; The cam chain tension pivot mounting structure of the internal-combustion engine of first aspect invention; In this internal-combustion engine; Bent axle rotates freely via rolling bearing that the earth's axis is supported in the crankcase of internal-combustion engine, and the spring bearing plate of accepting the cardinal extremity of spring members is fixed in said crankcase, and this spring members is to applying active force with said rolling bearing to the pushing plug of radially pushing; The cam chain sprocket wheel is located at the said rolling bearing of perforation and an outstanding laterally outside axial region of said bent axle; The cam chain tension guiding element applies tension on said cam chain sprocket wheel reels and with the cam chain of transmission of power to valve mechanism, this cam chain tension guiding element is supported in the said crankcase, wherein by the cam chain tension pivot shaft; Said pushing plug be equipped on said cam chain tension pivot near, said cam chain tension pivot is positioned by said spring bearing plate.
The cam chain tension pivot mounting structure of the internal-combustion engine of second aspect invention; On the basis of first aspect invention; It is characterized in that at an outside axial region of said bent axle, it is indoor that said cam chain sprocket wheel and alternator are arranged at interior side chain chamber and the outside alternator separated by the next door parts respectively dividually; Said cam chain tension pivot is supported by said partition member, and chimeric and carry out radial location with the pivot hole that is formed at said spring bearing plate.
The cam chain tension pivot mounting structure of the internal-combustion engine of third aspect invention; On the basis of second aspect invention; It is characterized in that, bloat the protuberance of formation, with the end butt of said cam chain tension pivot and carry out the axially locating of said cam chain tension pivot at said partition member.
The cam chain tension pivot mounting structure of the internal-combustion engine of fourth aspect invention, in first aspect～third aspect arbitrary aspect on the basis of invention, it is characterized in that, said spring bearing plate by a bolt in crankcase.
The cam chain tension pivot mounting structure of the internal-combustion engine of the 5th aspect invention; In first aspect～fourth aspect arbitrary aspect the invention the basis on; It is characterized in that; Said pushing plug is along the outer periphery of said rolling bearing, and utilizes said cam chain tension pivot to be disposed at the opposite side of cylinder cap side of extending with said cam chain tension guiding element.
The cam chain tension pivot mounting structure of the internal-combustion engine of the 6th aspect invention; On the basis that invent arbitrary aspect in aspect first aspect～5th; It is characterized in that, be formed with lug boss, the said pushing plug of chimeric insertion in this circular hole in that said crankcase is outstanding with circular hole; Position around the said circular hole of said lug boss, otch and being formed with to oil groove.
The cam chain tension pivot mounting structure of the internal-combustion engine of the 7th aspect invention on the basis of invention aspect the 6th, is characterized in that, the said oil groove of giving forms towards vertical top and vertical below from said circular hole.
Cam chain tension pivot mounting structure according to the internal-combustion engine of first aspect record; Since pushing plug be equipped on the cam chain tension pivot near; The cam chain tension pivot is positioned by the spring bearing plate; Therefore, need not increase the spring bearing plate and promptly can be used for positioning cam chain tensioning pivot, can seek the reduction and the lightweight of number of components.This spring bearing plate is used for rolling bearing is applied active force to the pushing plug of radially pushing.
Because the spring bearing plate is a small parts, thus when being fixed in crankcase, also can fix by less connection piece, thus number of components can be cut down and more lightweight can be sought.
The cam chain tension pivot mounting structure of the internal-combustion engine that invention is put down in writing according to second aspect; Owing to utilize the partition member of separating interior side chain chamber and outside alternative electric generation unit room to support the cam chain tension pivot; Therefore; Do not need to be provided with and the partition member various parts in addition, can reduce number of components, can improve assembling operation property yet.
In addition, the cam chain tension pivot is with to be formed at the pivot hole of spring bearing plate chimeric and carry out radial location, thereby can fix effectively.
The cam chain tension pivot mounting structure of the internal-combustion engine that invention is put down in writing according to the third aspect; Owing on partition member, bloat the protuberance of formation; With the end butt of cam chain tension pivot and carry out the axially locating of cam chain tension pivot, therefore, do not need to install in addition the axially locating of carrying out the cam chain tension pivot with the partition member various parts; Thereby can reduce number of components, also can easily carry out assembling operation.
According to the cam chain tension pivot mounting structure of the internal-combustion engine of fourth aspect invention record and since the spring bearing plate by a bolt in crankcase, therefore can cut down number of components and seek lightweight.
The cam chain tension pivot mounting structure of the internal-combustion engine that invention is put down in writing according to the 5th aspect; Because the pushing plug is along the outer periphery of rolling bearing; And utilize the cam chain tension pivot to be disposed at the opposite side of cylinder cap side of extending with the cam chain tension guiding element; Therefore, can effectively utilize the space and pushing is plugged with to imitate and be disposed at compactly and not interfere with the cam chain tension guiding element and the position of assembling easily, thereby can improve assembling operation property.
The cam chain tension pivot mounting structure of the internal-combustion engine that invention is put down in writing according to the 6th aspect is formed with the lug boss with circular hole owing to giving prominence at crankcase, the chimeric pushing plug that is inserted with in this circular hole; Position around the circular hole of lug boss; Otch and being formed with to oil groove, therefore, oil is filled in the circular hole that portion slides within it via supply to pushing to oil groove; So can suppress to push the wearing and tearing of plug and lug boss, and can remove nonuseable part and seek lightweight.
The cam chain tension pivot mounting structure of the internal-combustion engine that invention is put down in writing according to the 7th aspect; Because the said oil groove of giving forms towards vertical top and vertical below from said circular hole; Therefore; From vertical top give the oil of oil groove effective supply to circular hole, can be from the discharging and be used for circulation of vertical below to oil groove, thus can the effectively lubricating pushing fill in.
Description of drawings
Fig. 1 is the unitary side view of the equipment of small motor cart of one embodiment of the invention;
Fig. 2 is the unitary side view of power unit;
Fig. 3 is the sectional drawing (III of Fig. 2-III line sectional drawing) of this power unit;
Fig. 4 is the major component amplification profile of this power unit;
Fig. 5 is the right side view that has omitted the part of internal-combustion engine;
Fig. 6 is the major component sectional drawing (VI of Fig. 5-VI line sectional drawing) of this internal-combustion engine;
Fig. 7 is the exploded perspective view of the mounting structure of expression right crankcase and cam chain tension guiding element;
Fig. 8 is the stereogram at the back side in expression next door;
Fig. 9 is the exploded perspective view of mounting structure of other embodiment's of expression right crankcase and cam chain tension guiding element.
Description of reference numerals
Embodiment
Below, based on Fig. 1～Fig. 8 one embodiment of the invention are described.
Fig. 1 is the side view that is suitable for the equipment of small motor cart 1 of one embodiment of the invention.
Vehicular body front 1f and rear vehicle 1r link via low base plate 1c, and the vehicle frame that constitutes body framing roughly is made up of with the person in charge 4 falling tube 3.
Promptly; Falling tube 3 extends downwards from the head pipe 2 of Vehicular body front 1f; This person in charge 3 is flatly crooked and below base plate 1c, extends towards the rear in the lower end; Linking in its back-end has pairing left and right to be responsible for 4, is responsible for 4 and erects to oblique rear from this linking department, is flatly crooked and rearward extends at specified altitude.
Be supported with fuel tank 5 etc. by this person in charge 4, dispose seat 6 above it.
On the other hand, at Vehicular body front 1f, be provided with the handle 11 of 2 supportings of head of a quilt pipe up, front fork 12 extends downwards and is supported with front-wheel 13 at its lower end axle.
Be responsible near the outstanding carriage 15 that the is provided with central authorities of 4 rake, power unit 20 can joltily link via binding parts 16 and is supported on this carriage 15.
The front portion of power unit 20 is single-cylinder four-stroke water-cooled engines 30; Cylinder body 32 is being leaned forward significantly to attitude roughly near level; The end of the pipe-hanging hook of forwards giving prominence to from the upper end of this crankcase 31 18 links via pivot (pivot fulcrum) 19 and said binding parts 16.
The setting of this reduction gear 110 is arranged between supporting bracket 29 and the said person in charge's 4 the rear portion at power unit 20 rear portions posterior bumper 22 is installed.
Reference is as Fig. 2 of the side view of power unit 20; Top at power unit 20; Suction tude 23 is extended from the top of the cylinder cap that leans forward more greatly 33 of internal-combustion engine 30 and is rearward crooked; The tb 25 that is connected with this suction tude 23 is positioned at the top of cylinder body 32, the air-strainer 26 that links via connecting pipe 23c and this tb 25 the place ahead of supporting bracket 29 be equipped on variable v-belt drive 80 above.
In addition, sparger 24 towards tuned port injection fuel is installed on suction tude 23.
On the other hand, the outlet pipe 27 that extends downwards from the bottom of cylinder body 33, the rearward crooked and ground that squints to the right rearward extends and is connected with the baffler (not shown) on trailing wheel 21 right sides.
Vehicular body front 1f is covered from front and back by front shroud 9a and leg shield 9b, and covers bottom from the place ahead towards side, the left and right sides by front shroud 9c, and the central part of handle 11 is covered by handle cover 9d.
Base plate 1c is covered by side cover 9e, and in addition, rear vehicle 1r is covered by body cover 10 from side, the left and right sides.
Fig. 3 is the sectional drawing (III of Fig. 2-III line sectional drawing) of power unit 20.
In the internal-combustion engine 30, the piston 42 that connecting rod 43 will move back and forth in the cylinder sleeve 321 of cylinder body 32 and the crank pin 40p of bent axle 40 link.
Crankcase 31 with about the left crankcase 31L cut apart and right crankcase 31R merge and constitute; Right crankcase 31R constitutes the halfbody of crankcase portion; The front portion of left crankcase 31L constitutes the halfbody of crankcase portion, and rearward bloats and be also used as the transmission case of variable v-belt drive 80 long before and after taking in.
The long left open face in the front and back of this transmission case (left crankcase) 31L is covered by transmission case cover 81; Be formed with the speed change chamber 80C that takes in variable v-belt drive 80 in inside; The right side open surface at rear portion is covered by reduction gear cover 111, is formed with the reduction gear chamber 110C that takes in reduction gear 110 in inside.
With reference to Fig. 3, in the so-called crankcase that constitutes being merged by the front portion of left crankcase 31L and right crankcase 31R, bent axle 40 rotates each sidewall that is supported on left and right sides crankcase 31L, 31R freely via the main bearing 41,41 as left and right sides rolling bearing.
Right outside axial region in the outside axial region that extends to the left and right horizontal direction of bent axle 40; One and embedding rotationally are equipped with cam chain driving sprocket wheel 44 and oil pump actuation gear 45; And; Be provided with alternator 70 at right-hand member, be provided with the centrifugal load (ウ ウ エ イ ト) 82 and driving pulley 85 of variable v-belt drive 80 at the left-external side axial region.
This four circulation engine 30 has adopted SOHC type valve delivery system; In cylinder head cover 34, be provided with valve mechanism 50; The cam chain 51 that carries out transmission of power to this valve mechanism 50 is set up between camshaft 53 and the bent axle 40; Thus, cam chain chamber 52 is communicated with right crankcase 31R, cylinder body 32, cylinder cap 33 and (with reference to Fig. 3) is set.
Promptly; Cam chain 51 passes 52 inside, cam chain chamber and strides and be located between cam chain driven sprocket 55 and the said cam chain driving sprocket wheel 44; This cam chain driven sprocket 55 embeds the right-hand member that is installed on the camshaft 53 that points to the left and right horizontal direction, and this cam chain driving sprocket wheel 44 embeds and is installed on bent axle 40.
Each roller of the end of intake rocker 56 and exhaust rocker arm 57 and the intake cam face and the exhaust cam face of cam 53 join.
Right flank at cylinder cap 33 and cylinder head cover 34; On both junction planes, be formed with circular open; Be embedded at this circular open seal ring parts 128 are installed, the water pump body 121 watertight feuds of the formation drum of water pump 120 embed sealing coil component 128 and by its supporting.
The pump live axle 123 of water pump 120 is linked to the right-hand member of camshaft 53 coaxially.
In addition, on cylinder cap 33, from the opposition side (left side) of cam chain chamber 52 to the firing chamber 35 chimeric spark plugs 36 (with reference to Fig. 2, Fig. 3) that are inserted with.
With reference to Fig. 4, on the sidewall 31Rw of the formation cam chain chamber 52 of right crankcase 31R, have circular open 31Rh, this circular open 31Rh is utilized the partition member that bolt 66 installs from the right side be next door 65 sealings, the cylindrical part 65a in bent axle 40 perforation next doors 65.
At the right flank of external rotor 72, central authorities are installed bloat and form discoideus fan substrate 74a, on fan substrate 74a, be formed with a plurality of radiator fans 74 to the right highlightedly.
The excircle of the external rotor 72 of alternator 70 is roughly surrounded from the extended to the right tubular perisporium of the sidewall 31Rw of right crankcase 31R 31c; The excircle of radiator fan 74 is surrounded by fan guard 77; Right side at radiator fan 74 closely is provided with radiator 75, and the radiator box 76 that radiator 75 is had venetian blind covers.
On the other hand; Left-external side axial region at the bent axle 40 of the variable v-belt drive 80 in power unit 20 left sides is provided with driving pulley 85; This driving pulley 85 is installed near the fixed pulley half 85s bent axle 40 left ends by embedding and constitutes relatively and at axial slidable moving pulley half 85d on the right side with it; In the behind (right side) of activity pulley half 85d, centrifugal load 82 radially is being held in movably between guide plate 83 and activity pulley half 85d fixing on the bent axle 40.
Rear at this driving pulley 85; Rotate the earth's axis freely and be supported on, constitute relatively and at axial slidable moving pulley half 90d in the left side by fixed pulley half 90s with it as the driven pulley 90 on the driven shaft 101 of the input shaft of reduction gear 110.
Fixed pulley bearing sleeve 92 mobilely is limited and relatively rotates freely via bearing 91 that the earth's axis is supported on driven shaft 101 axial, and the center hole of said fixed pulley half 90s is soldered and is fixed in integratedly the right-hand member lip part of this fixed pulley bearing sleeve 92.
On the excircle of this fixed pulley bearing sleeve 92; Movable belt wheel bearing sleeve 93 is housed outward; On movable belt wheel bearing sleeve 93, be formed with the slotted hole 93h of long size vertically, the outstanding pilot pin 94 that is arranged at fixed pulley bearing sleeve 92 is embedded among this slotted hole 93h, with respect to fixed pulley bearing sleeve 92; Movable belt wheel bearing sleeve 93 can axially relatively move, and is limited but relatively rotate.
The center hole of said activity pulley half 90d is soldered and is fixed in integratedly the right-hand member lip part of this activity belt wheel bearing sleeve 93.
Therefore, activity pulley half 90d together rotates with respect to fixed pulley half 90s, can be in the axial direction movably near or leave.
Variable v-belt drive 80 hang on V-belt 89 between driving pulley 85 and the driven pulley 90 and comes transferring power, and centrifugal load 82 is directed to plate 83 guiding according to engine speed and is moving radially, through this centrifugal load 82; Activity pulley half 85d moves with respect to fixed pulley half 85s; The volume of the V-belt 89 of driving pulley 85 is hung vary in diameter, and meanwhile, the volume of driven pulley 90 is hung diameter and also changed; Thus, gear ratio changes automatically and carries out stepless change.
In the centrifugal clutch 100; Forming the bowl-shape outer clutch race 105 that covers clutch inner race 102 excircles utilizes nut 106 base portion to be located at regularly near the left end of driven shaft 101; Applied active force by spring 102e and shake clutch shoe (the Network ラ Star チ シ ユ one) 102d that the earth's axis freely is supported on the arm 102c front end of fulcrum 102b, opposed and be equipped on the support plate 102a of clutch inner race 102 with the inner peripheral surface of outer clutch race 105.
Because the clutch inner race 102 of centrifugal clutch 100 rotates with the infinite variable speed driven pulley 90 that carries out of variable v-belt drive 80 integratedly; Therefore; When surpassing the regulation rotating speed, the arm 102c resistance spring 102e of clutch inner race 102 and shaking joins the inner peripheral surface of clutch shoe 102d and outer clutch race 105 and outer clutch race 105 is rotated integratedly; Thus, transmission of power is arrived driven shaft 101.
In the reduction gear 110 in the 110C of reduction gear chamber; Between driven shaft 101 and rear axle shaft 115, deceleration jack shaft 112 points to the direction (be left and right horizontal direction) parallel with them and sets up and spool be supported on transmission case 31L and reduction gear cover 111 via bearing 112b, 112b.
Embedding is installed on the middle large diameter gear 113 and the small-diameter gear 101g engagement that is formed at driven shaft 101 of reduction gear cover 111.
Trailing wheel 21 embed be installed on rear axle shaft 115 by the outstanding to the right part of reduction gear cover 111.
Therefore; The rotation of driven shaft 101 is via the engagement of small-diameter gear 101g and the engagement between the middle large diameter gear 113 and the small-diameter gear 112g and the rear axle shaft large diameter gear 114 of reduction gear 110; Quilt slows down and is delivered to rear axle shaft 115, and thus, trailing wheel 21 rotates.
The transmission chamber 80C from the left cover of the transmission case cover 81 of the drive pulley 85 from the front cover to the rear centrifugal clutch 100, the transmission case cover 81 has a front portion of foot-starting mechanism (a kick start mechanism) 180 .
Recoil axle (キ Star Network axle) 181 rotates and connects and be supported on the central authorities position a little on the front from transmission case cover 81 freely; Medial end embedding at this recoil axle 181 is equipped with driving helical gear 182; This driving helical gear 182 and the driven helical gear 183g engagement that is formed at sliding axle 183, this sliding axle 183 and bent axle 40 are coaxial and can be supported axially slidably.
Right-hand member at sliding axle 183 is fixed with ratchet 184, bent axle 40 sides, relatively embeds with ratchet 184 ratchet 185 is installed, and both utilize the slip of sliding axle 183 to engage or to separate.
Protuberance embeds the cardinal extremity that recoil arm 186 is installed in the outside of recoil axle 181, is provided with kickpedal 187 at the front end of this recoil arm 186.
Therefore; If enter into kickpedal 187; And recoil axle 181 is rotated via recoil arm 186, and then drive helical gear 182 and rotate integratedly with recoil axle 181, rotates also slip to the right integratedly with the driven helical gear 183g and the sliding axle 183 of its engagement; Ratchet 184 forcibly makes bent axle 40 rotate with ratchet 185 engagements, thus can cranking internal combustion engine 30.
Fig. 7 representes the stereogram seen from the right side of the right crankcase 31R of this internal-combustion engine 30.
Hold at the supporting spindle of right crankcase 31R on 41 the sidewall 31Rw, be formed with the circular open 31Rh that embeds the outer shroud 41o that main bearing 41 is installed via ring-type fixed component 41c.
At the right flank of this sidewall 31Rw, low and be the elliptical annular frame wall 31f of vertical length at the outstanding aspect ratio tubular perisporium 31c that is formed with between the periphery extended to the right tubular perisporium 31c of sidewall 31Rw and circular open 31Rh.
In addition, in ring-type frame wall 31f, below circular open 31Rh, be formed with the oil pump body 141 of oil pump 140 (with reference to Fig. 6).
Make next door 65 coverings and it is linked formation cam chain chamber 52c (with reference to Fig. 4) on every side by bolt 66 with the mode that covers this ring-type frame wall 31f in inside.
Ring-type frame wall 31f is formed with the 31fb of stud protrusion portion that bloats laterally at a plurality of positions, the stud protrusion portion 65b corresponding with the 31fb of this stud protrusion portion also is formed at the outer periphery portion (with reference to Fig. 8) in next door 65.When next door 65 being covered in ring-type frame wall 31f; Make the mutual 31fb of stud protrusion portion, 65b consistent each other; A plurality of bolts 66 are penetrated in the bolt through hole of the 65b of each stud protrusion portion in next door 65, screw togather with the bolt interior threaded hole of the 31fb of stud protrusion portion of ring-type frame wall 31f and link.
In addition, as stated, on the next door 65, be formed with the cylindrical part 65a that connects bent axle 40 in central authorities.
The part that in the tubular perisporium 31c of right crankcase 31R, combines with cylinder body 32, its with ring-type frame wall 31f between be formed with the cam chain chamber intercommunicating pore 52h that the cam chain chamber of cylinder body 32 sides 52 and cam chain chamber 52c in the ring-type frame wall 31f are communicated with.
Right flank in the ring-type frame wall 31f of sidewall 31Rw; Tiltedly top is formed with cylinder lug boss 31p a little highlightedly in the wings; And; Near below the cylinder lug boss 31p,, give prominence to than cylinder lug boss 31p biglyyer and to be formed with the oval lug boss 31q that bloats ovalisation in the position that a part is joined with circular open 31Rh.
At the end face butt of cylinder lug boss 31p the cardinal extremity cylindrical part 58a of cam chain tension guiding element 58 is arranged, the cam chain tension pivot 60 that inserts cardinal extremity cylindrical part 58a embeds end circular hole being arranged and shaking ground axle suspension cam chain tension guiding element 58 freely of cylinder lug boss 31p with its end.
On oval lug boss 31q, the circular hole 31qh near circular open 31Rh offers pushing plug 61 usefulness offers bolt interior threaded hole 31qb in a side of leaving from circular hole 31qh.
The notch part 31r that is formed at the part of circular open 31Rh is communicated with circular hole 31qh.
Chimeric insertion constitutes the pushing plug 61 of round-ended cylinder shape in circular hole 31qh, in this pushing plug 61, inserts helical spring 62.
The part of the periphery ora terminalis of the outer shroud 41o of the main bearing of embed installing along circular open 31Rh 41; Notch part 31r to this circular open 31Rh exposes, the pushing plug 61 of chimeric insertion circular hole 31qh can with the periphery ora terminalis butt (with reference to Fig. 4) of the outer shroud 41o that the conical surface 61t of its front end outer periphery is exposed to notch part 31r.
The end face butt of spring bearing plate 63 and oval lug boss 31q.
The cardinal extremity cylindrical part 58a of cam chain tension guiding element 58 is attached to cylinder lug boss 31p and cam chain tension pivot 60 is inserted into cardinal extremity cylindrical part 58a; And then; The end is embedded in the center hole of cylinder lug boss 31p and make the other end outstanding from cardinal extremity cylindrical part 58a; With inserting in the pushing plug 61 in the circular hole 31qh of pushing plug 61 another oval lug boss 31q of chimeric insertion and with helical spring 62, thereby make the end face butt of spring bearing plate 63 and oval lug boss 31q.
At this moment; Make by the outstanding cam chain tension pivot 60 of cardinal extremity cylindrical part 58a and penetrate in the pivot hole 63p of spring bearing plate 63; Accept and push the end that is inserted into the helical spring 62 in the pushing plug 61 and will push and fill in 61 and be pressed into; Thus, the bolt through hole 63b of spring bearing plate 63 and the bolt interior threaded hole 31qb of oval lug boss 31q are coincide.
And, in packing ring 64w penetrates into bolt 64 the bolt through hole 63b of spring bearing plate 63 and with the bolt interior threaded hole 31qb of oval lug boss 31q, screw togather, thereby the end face of spring bearing plate 63 with oval lug boss 31q linked.
If the helical spring 62 that an end is accepted by spring bearing plate 63 applies active force and is pressed into circular hole 31qh will push plug 61; Then as shown in Figure 4; The periphery ora terminalis butt of the conical surface 61t of the front end outer periphery of pushing plug 61 and the outer shroud 41o of the main bearing 41 that exposes to the notch part 31r of circular open 31Rh is also pushed; Therefore, can be with main bearing 41 to radially pushing and locating.
And the pivot hole 63p of extension part that is fixed in the spring bearing plate 63 of oval lug boss 31q end face is embedded in the end of cam chain tension pivot 60 and it is supported, thereby also can carry out the radial location of cam chain tension pivot 60.
In addition, as shown in Figure 8, the next door 65 so that the mode that covers the ring-type frame wall 31f that is equipped with spring bearing plate 63 grades in the inboard covers is forming the protuberance 65p that bloats established amount with the cam chain tension pivot 60 corresponding parts of its inner face.
As shown in Figure 6; When making next door 65 cover ring-type frame wall 31f; Protuberance 65p with from the end face butt of the outstanding cam chain tension pivot 60 of spring bearing plate 63 and push, thereby carry out the axially locating of cam chain tension pivot 60, cam chain tension pivot 60 is firmly fixed.
With reference to Fig. 5; Cardinal extremity cylindrical part 58a axle is supported on the cam chain tension guiding element 58 of cam chain tension pivot 60; Crooked and forwards extend along the upper portion of cam chain 51 from upside phase ground connection, and the cam chain chamber 52c in the ring-type frame wall 31f of right crankcase 31R passes cam chain intercommunicating pore 52h and is equipped in the cam chain chamber 52 of cylinder body 32, cylinder cap 33.This cam chain 51 passes in the cam chain chamber 52 and is set up in embedding on the bent axle 40 on the cam chain driving sprocket wheel 44 installed and the camshaft 53 in its place ahead and embeds between the cam driven sprocket of installing 55.
And; The stretcher 58T that is located at cylinder body 32 upper walls suitably pushes the central part of cam chain tension guiding element 58 to downside; Thus; This central part is pressed and is the cam chain tension guiding element 58 that the center is shaken to downside with cam chain tension pivot 60, pushes the upper portion of cam chain 51 and cam chain 51 is applied suitable tension force.
In addition, as shown in Figure 5,59 supportings of cam chain guiding element and guiding that the lower portion of cam chain 51 is roughly extended linearly.
This cam chain guiding element 59 is supported on the support of cylinder body 32 via pin 59p with the 59b of sprocket wheel portion of front side, and the rearward end of slight curvature is supported by the guiding carrier 31r in the ring-type frame wall 31f of right crankcase 31R.
In addition; As shown in Figure 6; The oil pump 140 that is formed in the ring-type frame wall 31f makes oil pump cover 142 cover oil pump body 141, and the oil pump live axle 143 that connects oil pump cover 142 is supported on next door 65 (as shown in Figure 8, the back side of next door 65 is formed with a bearing hole 65v of supporting oil pump live axle 143) with an end axle; Embedding is installed on the oil pump driven gear 144 and said oil pump actuation gear 45 engagements of this oil pump live axle 143; Thus, the rotation of bent axle 40 is delivered to oil pump live axle 143, and oil pump 140 is driven.
In the mounting structure of the cam chain tension pivot 60 of axle supporting cam chain tension guiding element 58; Pushing plug 61 is equipped near the cam chain tension pivot 60; Cam chain tension pivot 60 is by next door 65 supporting, and chimeric and carry out radial location with the pivot hole 63p that is formed at spring bearing plate 63, therefore; Need not increase spring bearing plate 63 and can be used for the radial location of cam chain tension pivot 60, can seek the reduction and the lightweight of number of components.This spring bearing plate 63 is used for main bearing 41 is applied active force to the pushing plug of radially pushing 61.
Because spring bearing plate 63 is a small parts, thus when being fixed in crankcase 31, also can fix by a bolt 64, thus number of components can be cut down and more lightweight can be sought.
Because the present invention installs the axially locating of carrying out cam chain tension pivot 60 with next door 65 other different parts; But the end butt that makes the protuberance 65p that bloats on the next door 65 and form and cam chain tension pivot 60 carries out the axially locating of cam chain tension pivot 60; Therefore; Number of components can be reduced, and also assembling operation can be easily carried out.
Then, the oval lug boss 31q that explanation as shown in Figure 9 has circular hole 31qh is provided with other embodiment to oil groove 70,71, the chimeric pushing plug 61 that is inserted with in this circular hole 31qh.
In addition, reference character directly uses used reference character in the previous embodiment except that giving oil groove 70,71.
Be inserted with in and chimeric among the oval lug boss 31q that forms outstanding from the sidewall 31Rw of right crankcase 31R pushing plug 61 circular hole 31qh around; Be formed with to oil groove 70 towards vertical top otch from circular hole 31qh, and be formed with to oil groove 71 from the vertical below of circular hole 31qh court also otch.
Therefore, oil supplies to the pushing plug 61 circular hole 31qh that slides of portion within it from the oil groove 70 of giving of vertical top, thereby can suppress to push the wearing and tearing of plug 61 and oval lug boss 31q, and can remove nonuseable part and seek lightweight.
Since from circular hole 31qh above vertical give oil groove 70 near above; The cardinal extremity cylindrical part 58a of cam chain tension guiding element 58 is by 60 supportings of cam chain tension pivot; Therefore; Cam chain tension pivot 60 location are returned oil and it are guided to circular hole 31qh so can effectively collect from what cam chain tension guiding element 58 returned for oil groove 70.
From vertical top give the oil of oil groove 70 effective supply to circular hole 31qh, can be swimmingly from the discharging for oil groove 71 and be used for circulation of vertical below, thereby can the effectively lubricating pushing fill in 61.
Claims (7)
1. the cam chain tension pivot mounting structure of an internal-combustion engine is characterized in that, in this internal-combustion engine, bent axle rotates freely via rolling bearing that the earth's axis is supported in the crankcase of internal-combustion engine,
The spring bearing plate of accepting the cardinal extremity of spring members is fixed in said crankcase, and this spring members is to applying active force with said rolling bearing to the pushing plug of radially pushing,
The cam chain sprocket wheel is located at the said rolling bearing of perforation and an outstanding laterally outside axial region of said bent axle,
The cam chain tension guiding element applies tension on said cam chain sprocket wheel reels and with the cam chain of transmission of power to valve mechanism, this cam chain tension guiding element is supported in the said crankcase by the cam chain tension pivot shaft,
Said pushing plug be equipped on said cam chain tension pivot near,
Said cam chain tension pivot is positioned by said spring bearing plate.
2. the cam chain tension pivot mounting structure of internal-combustion engine as claimed in claim 1; It is characterized in that; At an outside axial region of said bent axle, it is indoor that said cam chain sprocket wheel and alternator are arranged at interior side chain chamber and the outside alternator separated by the next door parts respectively dividually
Said cam chain tension pivot is by said next door parts carry, and chimeric and carry out radial location with the pivot hole that is formed at said spring bearing plate.
3. the cam chain tension pivot mounting structure of internal-combustion engine as claimed in claim 2 is characterized in that, on the parts of said next door, bloats the protuberance of formation, with the end butt of said cam chain tension pivot and carry out the axially locating of said cam chain tension pivot.
4. like the cam chain tension pivot mounting structure of each described internal-combustion engine in the claim 1～3, it is characterized in that, said spring bearing plate by a bolt in crankcase.
5. like the cam chain tension pivot mounting structure of each described internal-combustion engine in the claim 1～3; It is characterized in that; Said pushing plug is along the outer periphery of said rolling bearing, and utilizes said cam chain tension pivot to be disposed at the opposite side of cylinder cap side of extending with said cam chain tension guiding element.
6. like the cam chain tension pivot mounting structure of each described internal-combustion engine in the claim 1～3; It is characterized in that; At the outstanding lug boss that is formed with of said crankcase with circular hole; The said pushing plug of chimeric insertion in this circular hole, position around the said circular hole of said lug boss, otch and being formed with to oil groove.
7. the cam chain tension pivot mounting structure of internal-combustion engine as claimed in claim 6 is characterized in that, the said oil groove of giving forms towards vertical top and vertical below from said circular hole.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008246756 | 2008-09-25 | ||
| JP246756/08 | 2008-09-25 | ||
| JP327222/08 | 2008-12-24 | ||
| JP2008327222A JP5074369B2 (en) | 2008-09-25 | 2008-12-24 | Cam chain tensioner pivot mounting structure for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101684854A CN101684854A (en) | 2010-03-31 |
| CN101684854B true CN101684854B (en) | 2012-10-10 |
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ID=42048154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101746422A Active CN101684854B (en) | 2008-09-25 | 2009-09-21 | Cam chain tension pivot mounting structure of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101684854B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5903852B2 (en) * | 2011-11-29 | 2016-04-13 | スズキ株式会社 | Crankcase structure of internal combustion engine |
| CN105626302B (en) * | 2014-11-07 | 2018-04-27 | 光阳工业股份有限公司 | The clearance eliminating mechanism of engine crankshaft |
| CN107429633B (en) * | 2015-03-31 | 2019-07-05 | 本田技研工业株式会社 | Internal combustion engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4480603A (en) * | 1981-02-20 | 1984-11-06 | Honda Giken Kogyo Kabushiki Kaisha | Chain tightening mechanism for DOHC engine |
| CN1417500A (en) * | 2001-10-31 | 2003-05-14 | 本田技研工业株式会社 | Timing-chain tensioner |
| CN1497146A (en) * | 2002-09-30 | 2004-05-19 | 本田技研工业株式会社 | Structure for preventing out-of cam chain of internal-conbustion engine |
-
2009
- 2009-09-21 CN CN2009101746422A patent/CN101684854B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4480603A (en) * | 1981-02-20 | 1984-11-06 | Honda Giken Kogyo Kabushiki Kaisha | Chain tightening mechanism for DOHC engine |
| CN1417500A (en) * | 2001-10-31 | 2003-05-14 | 本田技研工业株式会社 | Timing-chain tensioner |
| CN1497146A (en) * | 2002-09-30 | 2004-05-19 | 本田技研工业株式会社 | Structure for preventing out-of cam chain of internal-conbustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101684854A (en) | 2010-03-31 |
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