CN101713333A - An internal combustion engine - Google Patents
An internal combustion engine Download PDFInfo
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- CN101713333A CN101713333A CN200910179564A CN200910179564A CN101713333A CN 101713333 A CN101713333 A CN 101713333A CN 200910179564 A CN200910179564 A CN 200910179564A CN 200910179564 A CN200910179564 A CN 200910179564A CN 101713333 A CN101713333 A CN 101713333A
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- gear
- idle wheel
- box
- shaft
- hole
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
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Abstract
The invention discloses an internal combustion engine provided with a crank gear, a balancing gear and an intermediate gear. The crank gear is fixed on a crank that supported on an engine noumenon in a freely rotating way; the balancing gear is fixed on a balancing shaft set on the engine noumenon that can rotate freely; the intermediate gear transmits the rotation of the crank gear to the balancing gear by engaging the crank gear with the balancing gear; a gear box contains the intermediate gear and the balancing gear, and is mounted on lateral part of the engine noumenon; a positioning part is set between the engine noumenon and the gear box, and positions location of rotating center of the intermediate gear.
Description
Technical field
The present invention relates to a kind of internal-combustion engine with the trunnion shaft that rotates synchronously with bent axle.
Background technique
In the multi-cylinder engine that on automobile etc., is carried,, produce vibration (axial force), and along with the to-and-fro motion of piston, produce the vibration (radial force) that the inclination by connecting rod causes when piston during in top dead center and lower dead center upset.In order to eliminate these vibromotive forces, on motor, be provided with the trunnion shaft that rotates synchronously with bent axle.In general, bent axle and trunnion shaft transmit the rotation of bent axle to trunnion shaft synchronously by timing chain and sprocket mechanical connection.
But, in diesel engine,, therefore when the employing timing chain makes bent axle and trunnion shaft interlock, need carry out more accurate management to the tension force of timing chain etc. because to compare cogging big with petrol engine.For fear of the complexity of this management, especially in diesel engine, there is the trend of using gear to replace timing chain.
In the past, proposed to have with bent axle and trunnion shaft various structures (for example referring to Patent Document 1) by gear row mechanical connection.Like this, under the situation that adopts gear biographies graduating power, between gear, produce excessive friction during engagement and on the flank of tooth, produce wearing and tearing, the backlash amount increases and produce problem such as gearing noise, need fully guarantee the accuracy of mesh between the gear.For this reason, the gear center hole that limits the axle base of each gear need be processed accurately and be equipped with on the cylinder block of each gear.Yet in general the gear center hole of processing each gear on cylinder block accurately is the comparison difficulty, has the problem that increases cost in order to realize high-precision processing.
The technology of the patent documentation 1 of Ti Chuing was in the past, in the end of bent axle crankshaft gear was set, and in the end of trunnion shaft balance gear was set, and was engaged with idle wheel between crankshaft gear and balance gear, thus with the rotation of crankshaft gear to the balance gear transmission.In order to absorb the trueness error of three gear axle bases, adopt scissor gears to reduce becoming flexible between gear as idle wheel.By adopting scissor gears, can absorb the cumulative limit of three axle bases, keep the accuracy of mesh between gear.
But scissor gears is complex structure and expensive component, and cost is increased.And, owing to be to obtain structure with the corresponding facewidth of engagement by active force, therefore, because the adjustment situation may cause that engagement is bad, friction increases, fuel consumption increases, produce the problem of noise.
Patent documentation 1: TOHKEMY 2007-239521 communique
Summary of the invention
The present invention In view of the foregoing makes, an effective scheme of the present invention is, a kind of internal-combustion engine can be provided, connecting in the structure of bent axle and trunnion shaft by the gear row, by gear-box being installed to the shirtsleeve operation on the engine body, can limit the axle base of the rotating center of gear row accurately.
In a scheme of the present invention, a kind of internal-combustion engine is provided, it comprises: rotation freely is supported on the bent axle on the engine body; Be fixed on the crankshaft gear on the described bent axle; Rotation freely is located at the trunnion shaft on the described engine body; Be fixed on the balance gear on the described trunnion shaft; By with the engagement of described crankshaft gear and described balance gear, the idle wheel that the rotation of described crankshaft gear is transmitted to described balance gear; Take in described idle wheel and described balance gear, and be installed in the gear-box of the sidepiece of described engine body; And between described engine body and described gear-box, the positioning part that the position of the rotating center of described idle wheel is positioned.
In described internal-combustion engine, described positioning part also can constitute, and comprising: insert and logically to be located at described idle wheel, as the gear shaft of the rotary middle spindle of this idle wheel; Be formed on the supported hole on the described gear-box; And being formed on supported hole on the described engine body, described each supported hole positions support to the position of the central shaft of described gear shaft.
Described internal-combustion engine also can constitute, in the supporting hole of described gear-box, support described gear shaft, thereby make the location, central position of described idle wheel and described balance gear, and described idle wheel is installed on the described gear-box, described gear shaft is supported in the supported hole of described engine body, described gear-box is assembled on the described engine body, thus make and the central position of described balance gear between the central position of oriented described idle wheel, with respect to described crankshaft gear location.
In described internal-combustion engine, described positioning part also can constitute, and comprising: the center hole of being located at the rotating center section of described idle wheel; Be located at the casing fixed gear shaft on the described gear-box, it is inserted and to lead in the described center hole of described idle wheel, and as the rotary middle spindle of this idle wheel; And being located at cylinder body supported hole on the described engine body, its position to the central shaft of described casing fixed gear shaft positions support.
In described internal-combustion engine, described positioning part also can constitute, and comprising: the center hole of being located at the rotating center section of described idle wheel; Be located at the cylinder body fixed gear shaft on the described engine body, it is inserted and to lead in the described center hole of described idle wheel, and as the rotary middle spindle of this idle wheel; And being located at case supports hole on the described gear-box, its position to the central shaft of described cylinder body fixed gear shaft positions support.
In described internal-combustion engine, described positioning part also can constitute, and comprising: be integrally formed on the described idle wheel, as the gear shaft of the rotary middle spindle of this idle wheel; Be formed on the supported hole on the described gear-box; And being formed on supported hole on the described engine body, described each supported hole positions support to the position of the central shaft of described gear shaft.
In described internal-combustion engine, described positioning part also can constitute, and when the described gear-box that will take in described balance gear was assembled on the described engine body, described positioning part positioned the position of the rotating center of described idle wheel.
Internal-combustion engine of the present invention connecting in the structure of bent axle and trunnion shaft by the gear row, by gear-box being installed to the shirtsleeve operation on the engine body, can limit the axle base of the rotating center of gear row accurately.
Description of drawings
Fig. 1 is the exploded stereogram of the internal-combustion engine of the 1st example of the present invention.
Fig. 2 is the partial perspective view of Fig. 1 of the state of mounting teeth roller box.
Fig. 3 is the part sectioned view of Fig. 1.
Fig. 4 is the partial elevation view of Fig. 1.
Fig. 5 is the stereogram of the relation of expression balance gear and idle wheel.
Fig. 6 is the sectional drawing of positioning part of the internal-combustion engine of expression the 2nd example of the present invention.
Fig. 7 is the sectional drawing of positioning part of the internal-combustion engine of expression the 3rd example of the present invention.
Fig. 8 is the sectional drawing of positioning part of the internal-combustion engine of expression the 4th example of the present invention.
Embodiment
As Fig. 1～shown in Figure 5, on the cylinder block 2 of motor 1, rotation freely is supported with bent axle 3, is fixed with crankshaft gear 4 in the end of bent axle 3.Side below cylinder block 2 is provided with casing 5, and rotation freely is supported with trunnion shaft 6 on casing 5.Trunnion shaft 6 extends abreast and disposes along bent axle 3, is provided with balance gear 7 on the end of trunnion shaft 6.
Trunnion shaft 6 is for example made and is provided with 2 and the structure of rotating simultaneously by gear abreast.On trunnion shaft 6, be provided with quality 9, by rotating synchronously, offset the vibromotive force of the motor 1 that produces along with the to-and-fro motion of not shown piston with the rotation of bent axle 3.
The balance gear 7 of trunnion shaft 6 and crankshaft gear 4 are configured in the same plane of end of cylinder block 2, are provided with idle wheel 8 between balance gear 7 and crankshaft gear 4.Idle wheel 8 and balance gear 7 and crankshaft gear 4 engagements, the rotation of crankshaft gear 4 is transmitted to balance gear 7 by idle wheel 8.
That is to say that the rotation of bent axle 3 is transmitted to trunnion shaft 6 by idle wheel 8, the trunnion shaft 6 and the rotation of bent axle 3 are rotated synchronously.
That is to say, between cylinder block 2 and gear-box 11, position, and the rotating center position of bent axle 4 and idle wheel 8 and the rotating center position of balance gear 7 and idle wheel 8 are positioned by the position of positioning part to the rotating center of idle wheel 8.By gear-box 11 is installed on the cylinder block 2, thereby the distance between each center at the center of the center of the center of crankshaft gear 4, idle wheel 8, balance gear 7 is carried out correct positioning.
Positioning part to the internal-combustion engine of the present invention's the 1st example describes.
As shown in Figure 3, on the card of idle wheel 8, be formed with axial region 15 respectively, with the rotary middle spindle of axial region 15 as idle wheel 8.On cylinder block 2, be formed with the supported hole 16 that one of axial region 15 distolateral position is positioned support.
And, on gear-box 11, being formed with the supported hole 17 that another distolateral position of axial region 15 is positioned support, another of axial region 15 is distolateral to be supported in the supported hole 17.Thus, the central shaft of idle wheel 8 is retained as the axle base of regulation with respect to the position of the central shaft of balance gear 7, and idle wheel 8 is supported on the gear-box 11.
In above-mentioned structure, freely be entrenched on the gear-box 11 on formed supported hole 17 and the cylinder block 2 in the formed supported hole 16 by axial region 15 rotation, thereby idle wheel 8 is located respectively with respect to gear-box 11 and cylinder block 2 idle wheel 8.Thus, the center of idle wheel 8 is located respectively with respect to the position at the center of balance gear 7 with respect to the position at the center of crankshaft gear 4, the center of idle wheel 8.
That is to say, be entrenched in the supported hole 17 of gear-box 11 by the other end, thereby in gear-box 11, become the state of the center of idle wheel 8 with respect to the centralized positioning of balance gear 7 with the axial region 15 of idle wheel 8.Under this state, be entrenched in by a end in the supported hole 16 of cylinder block 2 and gear-box 11 is installed on the cylinder block 2 axial region 15 of idle wheel 8, thereby make center, with respect to the centralized positioning of crankshaft gear 4 with respect to the oriented idle wheel 8 in the center of balance gear 7.
Thus, the center of the center of balance gear 7 and crankshaft gear 4 is that benchmark positions with the center of idle wheel 8, and the axle base of three axles at the center of the center of balance gear 7, crankshaft gear 4, the center of idle wheel 8 is positioned as the relation of regulation.
At this moment, because when gear-box 11 was assembled into cylinder block 2, axle base also was positioned, and therefore can realize the summary of the assembly operation of motor 1.And, need on cylinder block 2, not process axle inserting hole accurately as three center, therefore can suppress processing cost.And, do not need expensive component such as scissor gears, therefore can suppress the component cost, and can reduce friction.
Therefore, connecting by gear row in the structure of bent axle 3 and trunnion shaft 6,, can limit the axle base of rotating center of the row of balance gear 7, crankshaft gear 4, idle wheel 8 accurately by gear-box 11 being installed to the shirtsleeve operation on the cylinder block 2.That is to say, need not the gear center hole that processing accurately is used to limit the axle base of gear, the processing that does not need to carry out difficulty and increase cost be installed on the cogged cylinder block 2.
By limiting the axle base of gear row accurately, can keep the accuracy of mesh suitable between the gear.Thus, produce excessive friction in the time of can eliminating between the gear engagement and on the flank of tooth, produce wearing and tearing, the backlash amount increases and produce the problem of gearing noise etc.Can eliminate as the noise that produces owing to gearing noise on the trunnion shaft 6 of the equipment that suppresses vibration.
Thus, in the big diesel engine of cogging, can easily use gear row as being used to make the synchronous mechanical connection mechanism of bent axle 3 and trunnion shaft 6.
Assembling method to said structure describes.
Preparation constitutes the cylinder block 2 of rotatable axle 6 of balance support freely and bent axle 3.To take in the supported hole 17 of gear-box 11 of balance gear 7 as a distolateral insertion of the axial region 15 of the rotating center of idle wheel 8, so that the central position of idle wheel 8 is with respect to the centralized positioning of above-mentioned balance gear 7, and idle wheel 8 is configured to and balance gear 7 engagements.Another distolateral insertion of axial region 15 is located in the supported hole 16 on the cylinder block 2,, and idle wheel 8 is configured to and crankshaft gear 4 engagements so that the central position of idle wheel 8 is with respect to the centralized positioning of crankshaft gear 4.Then, the gear-box 11 of taking in idle wheel 8 and balance gear 7 is assembled on the cylinder block 2.
According to Fig. 6～Fig. 8, other examples of positioning part are described.In addition, the member of the member beyond the positioning part and Fig. 1～shown in Figure 5 is identical, thus the identical symbol of mark also the repetitive description thereof will be omitted.
Structure to the positioning part of the internal-combustion engine of the 2nd example of the present invention shown in Figure 6 describes.
As shown in Figure 6, on crankshaft gear 4 and balance gear 7, be engaged with idle wheel 20.In the rotating center section of idle wheel 20, be provided with center hole 21, on center hole 21, be fixed with gear shaft 22 as the rotary middle spindle of idle wheel 20.
On cylinder block 2, be formed with the supported hole 16 that one of gear shaft 22 distolateral position is positioned support.And, on gear-box 11, be formed with the supported hole 17 that another distolateral position of gear shaft 22 is positioned support.Another of gear shaft 22 is distolateral to be supported in supported hole 17 by making, thereby makes the central shaft of idle wheel 20 remain the axle base of regulation with respect to the position of the central shaft of balance gear 7, and idle wheel 20 is supported on the gear-box 11.
In said structure, freely be entrenched on the gear-box 11 on formed supported hole 17 and the cylinder block 2 in the formed supported hole 16 by gear shaft 22 rotation, thereby idle wheel 20 is located respectively with respect to gear-box 11 and cylinder block 2 idle wheel 20.Thus, make the center of idle wheel 20, the axle base of three axles is orientated as the relation of regulation with respect to the center of the position at the center of crankshaft gear 4, idle wheel 20 location positioning with respect to the center of balance gear 7.
In structure shown in Figure 6, as the gear shaft 22 and the idle wheel 20 split settings of the rotary middle spindle of idle wheel 20, the shape of idle wheel 20 is simplified, realize the reduction of component processing cost.
Structure to the positioning part of the internal-combustion engine of the present invention shown in Figure 7 the 3rd example describes.
As shown in Figure 7, on crankshaft gear 4 and balance gear 7, be engaged with idle wheel 20, be provided with center hole 21 in the rotating center section of idle wheel 20.Be formed with casing fixed gear shaft 23 on gear-box 11, it is inserted and to lead in the center hole 21 of idle wheel 20, thereby as the rotary middle spindle of idle wheel 20.Casing fixed gear shaft 23 connects the center hole 21 of idle wheel 20, and the end portion supports of casing fixed gear shaft 23 is in the supported hole 16 of cylinder block 2.
In above-mentioned structure, center hole 21 rotations of idle wheel 20 freely are entrenched on the casing fixed gear shaft 23, the end portion supports that makes casing fixed gear shaft 23 is in the supported hole 16 of cylinder block 2, thereby with casing fixed gear shaft 23 is benchmark, makes the center of balance gear 7 and the centralized positioning of crankshaft gear 4.Thus, the axle base of these three axles of center of the center of the center of balance gear 7, crankshaft gear 4, idle wheel 20 is orientated as the relation of regulation.
In structure shown in Figure 7, the rotary middle spindle of idle wheel 20 is that casing fixed gear shaft 23 is formed on the gear-box 11, the shape of idle wheel 20 is simplified, and realized the minimizing of amount of parts and the reduction of component processing cost.
Structure to the positioning part of the internal-combustion engine of the 4th example of the present invention shown in Figure 8 describes.
As shown in Figure 8, on crankshaft gear 4 and balance gear 7, be engaged with idle wheel 20, be provided with center hole 21 in the rotating center section of idle wheel 20.Be formed with cylinder body fixed gear shaft 24 on cylinder block 2, it is inserted and to lead in the center hole 21 of idle wheel 20, thereby as the rotary middle spindle of idle wheel 20.Cylinder body fixed gear shaft 24 connects the center hole 21 of idle wheel 20, and the end portion supports of casing fixed gear shaft 24 is in the supported hole 17 of gear-box 11.
In above-mentioned structure, center hole 21 rotations of idle wheel 20 freely are entrenched on the cylinder body fixed gear shaft 24, the end portion supports that makes cylinder body fixed gear shaft 24 is in the supported hole 17 of gear-box 11, thereby with cylinder body fixed gear shaft 24 is benchmark, makes the center of balance gear 7 and the centralized positioning of crankshaft gear 4.Thus, the axle base of these three axles of center of the center of the center of balance gear 7, crankshaft gear 4, idle wheel 20 is orientated as the relation of regulation.
In structure shown in Figure 8, the rotary middle spindle of idle wheel 20 is that cylinder body fixed gear shaft 24 is formed on the cylinder block 2, the shape of idle wheel 20 is simplified, and realized the minimizing of amount of parts and the reduction of component processing cost.
In addition, suppose to adopt diesel engine above-mentioned example to be illustrated, but so long as the internal-combustion engine of the structure by gear row mechanical connection bent axle and trunnion shaft just can be applied to diesel engine internal-combustion engines in addition such as petrol engine as internal-combustion engine.
In addition, also have following definition: the parts that are called cylinder block in the foregoing description are called lower box, the combination of cylinder block and cylinder head are called engine main body, with lower box and engine main body as different parts.But in the present invention, will comprise that the integral body of parts this lower box, that bent axle is taken in is called cylinder block, and make this cylinder block become the component parts of engine main body.Therefore, the structure of lower box as the component parts of engine main body is also contained within the category of the present invention certainly.
Claims (7)
1. an internal-combustion engine is characterized in that, comprising:
Rotation freely is supported on the bent axle on the engine body;
Be fixed on the crankshaft gear on the described bent axle;
Rotation freely is located at the trunnion shaft on the described engine body;
Be fixed on the balance gear on the described trunnion shaft;
By with the engagement of described crankshaft gear and described balance gear, the idle wheel that the rotation of described crankshaft gear is transmitted to described balance gear;
Take in described idle wheel and described balance gear, and be installed in the gear-box of the sidepiece of described engine body; And
Between described engine body and described gear-box, the positioning part that the position of the rotating center of described idle wheel is positioned.
2. internal-combustion engine as claimed in claim 1 is characterized in that,
Described positioning part comprises:
Insert and logically to be located at described idle wheel, as the gear shaft of the rotary middle spindle of this idle wheel;
Be formed on the supported hole on the described gear-box; And
Be formed on the supported hole on the described engine body,
Described each supported hole positions support to the position of the central shaft of described gear shaft.
3. internal-combustion engine as claimed in claim 2 is characterized in that,
In the supporting hole of described gear-box, support described gear shaft, thereby make the location, central position of described idle wheel and described balance gear, and described idle wheel is installed on the described gear-box,
Described gear shaft is supported in the supported hole of described engine body, described gear-box is assembled on the described engine body, thereby make and the central position of described balance gear between the central position of oriented described idle wheel, with respect to described crankshaft gear location.
4. internal-combustion engine as claimed in claim 1 is characterized in that,
Described positioning part comprises:
Be located at the center hole of the rotating center section of described idle wheel;
Be located at the casing fixed gear shaft on the described gear-box, it is inserted and to lead in the described center hole of described idle wheel, and as the rotary middle spindle of this idle wheel; And
Be located at the cylinder body supported hole on the described engine body, its position to the central shaft of described casing fixed gear shaft positions support.
5. internal-combustion engine as claimed in claim 1 is characterized in that,
Described positioning part comprises:
Be located at the center hole of the rotating center section of described idle wheel;
Be located at the cylinder body fixed gear shaft on the described engine body, it is inserted and to lead in the described center hole of described idle wheel, and as the rotary middle spindle of this idle wheel; And
Be located at the case supports hole on the described gear-box, its position to the central shaft of described cylinder body fixed gear shaft positions support.
6. internal-combustion engine as claimed in claim 1 is characterized in that,
Described positioning part comprises:
Be integrally formed on the described idle wheel, as the axle of the rotary middle spindle of this idle wheel;
Be formed on the supported hole on the described gear-box; And
Be formed on the supported hole on the described engine body,
Described each supported hole positions support to the position of the central shaft of described gear shaft.
7. internal-combustion engine as claimed in claim 1 is characterized in that,
When the described gear-box that will take in described balance gear was assembled on the described engine body, described positioning part positioned the position of the rotating center of described idle wheel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-250653 | 2008-09-29 | ||
| JP2008250653A JP2010077956A (en) | 2008-09-29 | 2008-09-29 | Internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101713333A true CN101713333A (en) | 2010-05-26 |
| CN101713333B CN101713333B (en) | 2012-04-11 |
Family
ID=42208657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101795645A Expired - Fee Related CN101713333B (en) | 2008-09-29 | 2009-09-29 | An internal combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2010077956A (en) |
| CN (1) | CN101713333B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9732837B2 (en) | 2015-02-09 | 2017-08-15 | Hyundai Motor Company | Idle gear assembly |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6360032A (en) * | 1986-08-29 | 1988-03-16 | Aisin Seiki Co Ltd | Punching die for pressing having swing block |
| US5038727A (en) * | 1991-01-10 | 1991-08-13 | Briggs & Stratton Corporation | Engine balancing system having freely rotatable single counterbalance weight |
| JP2000199438A (en) * | 1998-12-28 | 2000-07-18 | Honda Motor Co Ltd | Cam drive structure for four-stroke v-type engine |
| CN2359484Y (en) * | 1999-03-26 | 2000-01-19 | 山东巨菱股份有限公司 | Eight-gear wheel train for SD 1125-type diesel engine |
| CN2508005Y (en) * | 2001-08-23 | 2002-08-28 | 山东巨菱股份有限公司 | Six-gear system of single-cylinder diesel engine |
| AT6297U1 (en) * | 2002-06-27 | 2003-07-25 | Avl List Gmbh | INTERNAL COMBUSTION ENGINE WITH AT LEAST ONE CYLINDER |
| JP2004100717A (en) * | 2002-09-04 | 2004-04-02 | Hidaka Eng:Kk | Balancer device for engine |
| JP4206839B2 (en) * | 2003-06-20 | 2009-01-14 | 三菱自動車工業株式会社 | Engine balancer housing |
| JP2007239521A (en) * | 2006-03-07 | 2007-09-20 | Hitachi Ltd | Balancer device of internal combustion engine, and method for assembling the balancer |
-
2008
- 2008-09-29 JP JP2008250653A patent/JP2010077956A/en active Pending
-
2009
- 2009-09-29 CN CN2009101795645A patent/CN101713333B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101713333B (en) | 2012-04-11 |
| JP2010077956A (en) | 2010-04-08 |
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Address after: No. 21, No. 3, Dingmu, No. 1, Toshiba, Tokyo, Japan Patentee after: Mitsubishi Jidosha Kogyo Kabushiki Kaisha Address before: No. 33fan 8, Chiwuding Mu, Tokyo Port Area, Japan Patentee before: Mitsubishi Jidosha Kogyo Kabushiki Kaisha |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120411 |