CN201137529Y - Water jacket type straightly arranged double-cylinder engine - Google Patents
Water jacket type straightly arranged double-cylinder engine Download PDFInfo
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- CN201137529Y CN201137529Y CNU2007200415772U CN200720041577U CN201137529Y CN 201137529 Y CN201137529 Y CN 201137529Y CN U2007200415772 U CNU2007200415772 U CN U2007200415772U CN 200720041577 U CN200720041577 U CN 200720041577U CN 201137529 Y CN201137529 Y CN 201137529Y
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Abstract
The utility model discloses a water jacket direct column double cylinder engine, comprising two cylinder parallel in a cylinder body, two gas distribution mechanisms relative to each cylinder and a crank shaft in a crank shaft box, wherein the piston in the cylinder drives the crank shaft via a connecting rod. The utility model is characterized in the cylinder body is assembled from a cylinder head, a front and a back cover plates, the two cylinders are shaped on the cylinder head, the two independent gas distribution mechanisms are at the outer side of the two cylinders and opposite the joint face of the two cylinders, the front and back cover plate and the wall of the cylinder head form a water jacket around the two cylinders. The utility model integrates the cylinder head and box of common water cooling engine to arrange the water jacket easily to obtain better cooling effect, and the cylinders have stable operation, simple structure, small volume, low weight and low production cost.
Description
Technical field
The utility model belongs to internal-combustion engine mechanical structure and improves technical field, is specifically related to a kind of straight arrangement double-cylinder mini engine of built-in water jacket.
Background technique
The cooling of air cooling engine is by the fan blade that engine crankshaft directly drives the radiating fin that is provided with on engine housing or the cylinder sleeve to be dispelled the heat, because this mode is simple in structure, cheap, therefore direct air-cooled design is widely used in simple and easy single cylinder and the V-type twin cylinder engine.But because the wind that fan blows out is a direction, the cylinder body windward side, side and back side wind speed are all different, so the temperature around the cylinder body differs bigger, if design straight arrangement double-cylinder or multi-cylinder engine, temperature between cylinder and the cylinder just more can't leave, so all being designed to V-type, arrange in two cylinders of direct air cooling twin-tub motor in the market, be about to two cylinders angle that staggers, make the air cooling effect of each cylinder be equal to single-cylinder air-cooled machine, but each cylinder operation circulation of four stroke engine is 720 °, two cylinders of V-type twin-tub machine stagger after the angle, be generally 90 °, then two cylinders are respectively 90 °～270 ° and 540 °～720 ° detonation works done, the angle of intersection is 270 ° and 450 °, so it is more not steady to work, and owing to the difference of the angle of intersection causes as using a problem that the carburetor air pipe pressure is different, so just must use two Carburetors, and general Carburetor is difficult to guarantee at each angle fuel feeding, the unanimity of tolerance, need to solve by coupling or manufacturing twobarrel carburetor, this has also increased cost.
Water-cooled engine is that one of design can be by the mobile water channel of water outside cylinder liner, beyond motor, design a cooling water tank, water channel and water tank are connected into a sealing and circulating water channel, with water pump water is flowed then, the heat energy of motor is taken away from cooling water tank, because flowing of water, thereby motor is dispelled the heat uniformly.Because this mode good heat dissipation effect, water channel can design arbitrarily as required, therefore the design of outer circulation water-cooled is widely used in the In-line multi-cylinder engine, but the structural configuration mode of existing this class multicylinder engine is complicated: cylinder head be owing to the reason of water channel must be made with the low-pressure die casting mode, processing difficulties and cost height; And the distribution device layout in the casing is generally used the overhead cam design, camshaft needs to be connected with timing gear through synchronous band or synchronous chain, make housing structure big and complicated, not only occupied the spatial volume of cylinder block front and back, and make all corresponding raising of manufacture cost of distribution device annex such as rocking arm, camshaft of control corresponding valve, and above-mentioned water cooled engine cylinder head and casing must separately make, and carries out segmented again and connect, and this water-cooling pattern obviously is not suitable for making mini engine.
Summary of the invention
The utility model purpose is at above-mentioned the deficiencies in the prior art, and a kind of straight arrangement double-cylinder mini engine of built-in water jacket is provided, and possesses good cooling results simultaneously, and cylinder operation is steady, and is simple in structure, and volume is little, the characteristics of in light weight and low cost of manufacture.
The technical solution of the utility model is: a kind of water jacket type straight arrangement double-cylinder engine, comprise two cylinders being positioned at cylinder block and being arranged in parallel, corresponding to the distribution device of each cylinder and the bent axle that is positioned at crankcase, the piston in the cylinder drives bent axle by connecting rod; Described cylinder block is formed by cylinder head and forward and backward cover plate splice, and two cylinders take shape on the cylinder head, and aforementioned independently two cover distribution devices are positioned at the outside of two cylinders, and opposed in the junction plane of two cylinders; Form water jacket between the shell wall of forward and backward cover plate and cylinder head around two cylinders.
The technological scheme that the utility model is more detailed is: a kind of water jacket type straight arrangement double-cylinder engine, comprise two cylinders being positioned at cylinder block and being arranged in parallel, corresponding to the distribution device of each cylinder and the bent axle that is positioned at crankcase, the piston in the cylinder drives bent axle by connecting rod; Distribution device comprises timing gear, camshaft, cam, tappet, push rod and rocking arm, and the timing gear that are installed on the bent axle drive camshaft, and the cam on the camshaft contacts tappet, and tappet contacts push rod, and push rod is by the switching of rocking arm control valve.Described cylinder block is formed by cylinder head and forward and backward cover plate splice, and two cylinders take shape on the cylinder head, and aforementioned independently two cover distribution devices are positioned at the outside of two cylinders, and opposed in the junction plane of two cylinders; The both sides of cylinder head form the passage for tappet and push rod activity.Form water jacket between the shell wall of forward and backward cover plate and cylinder head around two cylinders.Cowl hood, front shroud all form some radiating fin on the outer wall of back shroud simultaneously.Camshaft in described every cover distribution device has two, and these two camshafts be arranged in parallel with bent axle side by side and all, and every camshaft is provided with a cam; Two cams contact corresponding tappet respectively, and tappet contacts corresponding push rod, and push rod is controlled the switching of the intake valve or the exhaust valve of same cylinder by the rocking arm of correspondence.
The technological scheme that the utility model is more detailed is as follows: a kind of water jacket type straight arrangement double-cylinder engine, comprise two cylinders being positioned at cylinder block and being arranged in parallel, corresponding to the distribution device of each cylinder and the bent axle that is positioned at crankcase, the piston in the cylinder drives bent axle by connecting rod; Distribution device comprises timing gear, camshaft, cam, tappet, push rod and rocking arm, and the timing gear that are installed on the bent axle drive camshaft, and the cam on the camshaft contacts tappet, and tappet contacts push rod, and push rod is by the switching of rocking arm control valve.Described cylinder block is formed by cylinder head and forward and backward cover plate splice, and two cylinders take shape on the cylinder head, and aforementioned independently two cover distribution devices are positioned at the outside of two cylinders, and opposed in the junction plane of two cylinders; The both sides of cylinder head form the passage for tappet and push rod activity.Form water jacket between the shell wall of forward and backward cover plate and cylinder head around two cylinders.Cylinder head, front shroud all form some radiating fin on the outer wall of back shroud simultaneously.Camshaft in described every cover distribution device has two, and these two camshafts be arranged in parallel with bent axle side by side and all, and every camshaft is provided with a cam, and the cam on two camshafts is positioned at same plane; The timing gear that are installed on the bent axle are driving gear, and mesh with being fixed therein a driven gear on the camshaft, and are fixed with intermeshing driving gear respectively on two camshafts.Two cams contact corresponding tappet respectively, and tappet contacts corresponding push rod, and push rod is controlled the switching of the intake valve or the exhaust valve of same cylinder by the rocking arm of correspondence.The intake valve of same cylinder and the line between the exhaust valve are vertical with camshaft with bent axle.
The utility model has the advantages that:
1. be that two cylinders are provided with independence respectively and are opposite to the distribution device of cylinder block both sides in the utility model water jacket type straight arrangement double-cylinder engine, with conventional water cooled engine structure relatively, when having simplified complicated housing structure, abdicated the space, front and back in the cylinder block, therefore forward and backward cover plate and cylinder head are set easily form water jacket, and save external water tank, circulating water pump, the water channel that has also just saved in the conventional cylinder head is arranged, be equivalent to cylinder head and the design of casing one, saved the low-pressure die casting expense of cylinder head costliness conventional water cooled engine; Mould depanning, part processing are all very convenient, greatly reduce cost.
2. the utility model water jacket type straight arrangement double-cylinder engine has kept the basic structure of air cooling engine, cooling water acting in conjunction in cooling air and the water jacket makes each cylinder cooling evenly, and can reach the effect of water cooled engine substantially, but engine structure is simplified greatly, is fit to miniaturization, portability.
3. the utility model water jacket type straight arrangement double-cylinder engine has improved the engine cooling effect owing to adopted the water jacket type design, therefore two cylinders can be designed to form in upright arrangement side by side; And the twin-tub machine of form in upright arrangement is compared V-type twin-tub machine side by side, and two cylinder just in time is separated by 360 degree actings once, so stable working; And eliminated V-type twin-tub machine as adopting a situation that the carburetor air pipe pressure is different, so not only reduced by a Carburetor, it is much simple that annexes such as distribution device are wanted, and not only simplifies the structure, and reduced cost, also guaranteed the conformity of twin-tub work.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is an overall structure schematic representation of the present utility model;
Fig. 2 is the A-A cross section view of Fig. 1;
Fig. 3 is the B-B cross section view of Fig. 2;
Fig. 4 is the gear transmission mode structure diagram of same distribution device in the utility model.
Wherein: 1, cylinder block; 2, cylinder; 3, crankcase; 4, bent axle; 5, piston; 6, connecting rod; 7, timing gear; 8, camshaft; 9, cam; 10, tappet 11, push rod; 12, rocking arm 13, intake valve; 14, exhaust valve; 15, driven gear; 16, driving gear; 17, fan blade; 18, cylinder head; 19, front shroud; 20, back shroud; 21, water jacket; 22, passage; 23, radiating fin.
Embodiment
Embodiment: in conjunction with Fig. 1, Fig. 2, Fig. 3, Figure 4 shows that the embodiment of the utility model water jacket type straight arrangement double-cylinder engine, it comprises two cylinders 2 being positioned at cylinder block 1 and being arranged in parallel, corresponding to the distribution device of each cylinder 2 and the bent axle 4 that is positioned at crankcase 3, pistons 5 in the cylinder 2 drive bent axles 4 by connecting rod 6, and an end of bent axle 4 is equally installed fan blade 17 by its drive with prior art.
Each cylinder 2 all has separately independently distribution device, distribution device is made up of timing gear 7, camshaft 8, cam 9, tappet 10, push rod 11, rocking arm 12 and valve, the timing gear 7 that are installed on the bent axle 4 drive camshaft 8, cam 9 on the camshaft 8 contacts tappet 10, tappet 10 contacts push rod 11, push rod 11 is by the switching of rocking arm 12 control valves, and these all are prior aries certainly, and its specific implementation no longer describes in detail.
Aforementioned independently two cover distribution devices are positioned at the outside of two cylinders 2, and in the junction plane symmetric arrangement of two cylinders 2; The both sides of cylinder head 18 form the passage 22 for tappet 10 and push rod 11 activities.
As Fig. 4 represented, the camshaft 8 in described every cover distribution device had two, and these two camshafts 8 be arranged in parallel with bent axle 4 side by side and all, and every camshaft 8 is provided with a cam 9, and the cam 9 on two camshafts 8 is positioned at same plane; The timing gear 7 that are installed on the bent axle 4 are driving gear, and mesh with being fixed therein a driven gear 15 on the camshaft 8, and are fixed with intermeshing driving gear 16 respectively on two camshafts 8.
Two cams 9 in the same distribution device contact corresponding tappet 10 respectively, and tappet 10 contacts corresponding push rod 11, and push rod 11 is by the intake valve 14 of the same cylinder 2 of corresponding rocking arm 12 controls or the switching of exhaust valve 15.And the intake valve 14 and the line between the exhaust valve 15 of same cylinder 2 are vertical with camshaft 8 with bent axle 4, be intake valve 14 on the same cylinder 2 and the exhaust valve 15 opposed both sides that are distributed in bent axle 4 in the utility model, and the bent axle 4 terminal fan blades 17 of installing, so intake valve 14 is vertical with the wind direction of cooling air with the line of 15 of exhaust valves.Simultaneously be equivalent to two back-to-back combinations arranged side by side of single cylinder head for the utility model, the distribution device of each cylinder head all is toward the outer side, and the overall structure of the whole straight arrangement double-cylinder portable engine after the combination is symmetrical fully.
Conventional straight arrangement double-cylinder engine generally all is a water-cooled engine, the cylinder head of water-cooled engine and casing must separately be made, carrying out segmented again connects, cylinder head is the water channel that is communicated with cooling water tank of moulding not only, and the distribution device layout is generally used the overhead cam design, and promptly camshaft needs to be connected with timing gear through synchronous band or synchronous chain, has occupied the volume of cylinder head greatly for this reason, and making the complicated integral structure of casing and water cooled engine, volume is unsuitable for mini engine greatly.
The characteristics of the utility model water jacket type straight arrangement double-cylinder engine just are to be that two cylinders 2 are provided with independence respectively and are opposite to the distribution device of cylinder block 1 both sides by comparison, and abdicated front and back space in the cylinder block 1, therefore forward and backward cover plate 19,20 and 18 formation of cylinder head water jacket 21 around two cylinders 2 is set easily, and save external water tank, circulating water pump, the water channel that has also just saved in the conventional cylinder head is arranged, be equivalent to cylinder head and the design of casing one, saved the low-pressure die casting expense of cylinder head costliness conventional water cooled engine; Mould depanning, part processing are all very convenient, greatly reduce cost.
The utility model is equipped with fan blade 17 at the end of bent axle 4 simultaneously, has kept the basic structure of air cooling engine.The acting in conjunction of fan blade 17 and water jacket 21, it is moving to make that cooling water does not arrhea under the action of thermal difference of two cylinders 2 that are arranged in parallel, and accelerate the transmission of temperature conversely, the temperature gradient that mild gradually two cylinders are 2, help heat to leave from the radiating fin 23 on cylinder block 1 outer wall, therefore can reach the cooling effect of water cooled engine substantially, but structure simplifies suitable miniaturization, portability greatly.What deserves to be mentioned is that the water jacket 21 in the utility model can be fully closed, only on cylinder block 1, reserve water filling hole, for example be used on the portable electric generator easy-to-operat; Entry and exit that circulating water can be set on water jacket 21 of certainly also not limiting and external pumping equipment, with this as the outboard machine on the small-sized speedboat.
Because the utility model water jacket type straight arrangement double-cylinder engine has adopted the water jacket type design, has improved the engine cooling effect, therefore two cylinders 2 can be designed to form in upright arrangement side by side; As known technology, the twin-tub machine of form in upright arrangement is compared V-type twin-tub machine side by side, and two cylinder just in time is separated by 360 degree actings once, so stable working; Eliminated V-type twin-tub machine because the difference of the air inlet angle of intersection causes the different situation of suction press as using a Carburetor, owing to there is not phase difference, not only reduced by a Carburetor, it is much simple that annexes such as distribution device are wanted, not only simplify the structure, reduce cost, also guaranteed the conformity of twin-tub work.
Each distribution device for present embodiment, two camshafts 8 parallel with bent axle 4 are set, the optimized project of a cam 9 is set respectively on two camshafts 8, main purpose is to shorten the length of camshaft 8, reduce the volume of crankcase 3, simplify volume of the present utility model more and be convenient to the user and carry.Line between two valves on the same cylinder 2 and bent axle 4 and camshaft 8 are perpendicular in the present embodiment simultaneously, just the wind direction with cooling air is vertical, compared with prior art turn over 90 degree, thereby help the heat radiation of cylinder head 18, also just further improved cooling effect of the present utility model.
Claims (8)
1. water jacket type straight arrangement double-cylinder engine, comprise two cylinders (2) of being positioned at cylinder block (1) and being arranged in parallel, corresponding to distribution device of each cylinder (2) and the bent axle (4) that is positioned at crankcase (3), it is characterized in that described cylinder block (1) is spliced by cylinder head (18) and forward and backward cover plate (19,20), two cylinders (2) take shape on the cylinder head (18), aforementioned independently two distribution devices are positioned at the outside of two cylinders (2), and opposed in the junction plane of two cylinders (2); Form water jacket (21) between the shell wall of forward and backward cover plate (19,20) and cylinder head (18) around two cylinders (2).
2. water jacket type straight arrangement double-cylinder engine according to claim 1, it is characterized in that each distribution device comprises timing gear (7), camshaft (8), cam (9), tappet (10), push rod (11) and rocking arm (12), the timing gear (7) that are installed on the bent axle (4) drive camshaft (8), cam (9) on the camshaft (8) contacts tappet (10), tappet (10) contacts push rod (11), and push rod (11) is by the switching of rocking arm (12) control valve.
3. water jacket type straight arrangement double-cylinder engine according to claim 2 is characterized in that: the both sides of cylinder head (18) form for tappet (10) and the movable passage (22) of push rod (11).
4. water jacket type straight arrangement double-cylinder engine according to claim 2 is characterized in that forming some radiating fin (23) on the outer wall of described cylinder block (1).
5. water jacket type straight arrangement double-cylinder engine according to claim 2, it is characterized in that: the camshaft in each distribution device (8) has two, these two camshafts (8) be arranged in parallel with bent axle (4) side by side and all, and every camshaft (8) is provided with a cam (9); Two cams (9) contact corresponding tappet (10) respectively, and tappet (10) contacts corresponding push rod (11), and push rod (11) is by the intake valve (13) of the corresponding same cylinder of rocking arm (12) control or the switching of exhaust valve (14).
6. water jacket type straight arrangement double-cylinder generator according to claim 5, it is characterized in that: for each distribution device, the timing gear (7) that are installed on the bent axle (4) are driving gear, and with driven gear (15) engagement that is fixed on the camshaft (8), and be fixed with intermeshing driving gear (16) on two camshafts (8) respectively.
7. according to claim 5 or 6 described water jacket type straight arrangement double-cylinder generators, it is characterized in that: for each distribution device, the cam (9) on two camshafts (8) is positioned at same plane.
8. according to claim 5 or 6 described water jacket type straight arrangement double-cylinder generators, it is characterized in that: intake valve (13) and the line between the exhaust valve (14) on the same cylinder (2) are vertical with camshaft (8) with bent axle (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200415772U CN201137529Y (en) | 2007-11-23 | 2007-11-23 | Water jacket type straightly arranged double-cylinder engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200415772U CN201137529Y (en) | 2007-11-23 | 2007-11-23 | Water jacket type straightly arranged double-cylinder engine |
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| Publication Number | Publication Date |
|---|---|
| CN201137529Y true CN201137529Y (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200415772U Expired - Fee Related CN201137529Y (en) | 2007-11-23 | 2007-11-23 | Water jacket type straightly arranged double-cylinder engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454270A (en) * | 2019-08-30 | 2019-11-15 | 百变动力科技(深圳)有限公司 | Water-cooled engine |
| CN115324680A (en) * | 2022-09-20 | 2022-11-11 | 湖南敏行汽车科技有限公司 | Novel horizontal opposed engine valve mechanism |
-
2007
- 2007-11-23 CN CNU2007200415772U patent/CN201137529Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454270A (en) * | 2019-08-30 | 2019-11-15 | 百变动力科技(深圳)有限公司 | Water-cooled engine |
| CN115324680A (en) * | 2022-09-20 | 2022-11-11 | 湖南敏行汽车科技有限公司 | Novel horizontal opposed engine valve mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081022 Termination date: 20141123 |
|
| EXPY | Termination of patent right or utility model |