CN101881236A - Four-stroke engine - Google Patents
Four-stroke engine Download PDFInfo
- Publication number
- CN101881236A CN101881236A CN 201010177531 CN201010177531A CN101881236A CN 101881236 A CN101881236 A CN 101881236A CN 201010177531 CN201010177531 CN 201010177531 CN 201010177531 A CN201010177531 A CN 201010177531A CN 101881236 A CN101881236 A CN 101881236A
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- China
- Prior art keywords
- stroke engine
- cylinder block
- case lid
- middle housing
- crank
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a four-stroke engine which comprises a left box cover, a middle box body and a right box cover that are sequentially fixed, wherein the upper part of the middle box body is molded with a cylinder body; a piston inside the cylinder body is connected with a crankshaft by an integral forged connecting rod; the left and the right box covers are respectively provided with a bearing seat used for installing a crankshaft bearing; a first parting surface between the left box cover and the middle box body is parallel to a second parting surface between the right box cover and the middle box body; and the first parting surface and the second parting surface are vertical to a central connecting line between the two crankshaft bearings. The four-stroke engine improves the structure of the box body, thus greatly simplifying the assembly process; and the parts of the four-stroke engine are not needed to be combined and processed, so that the interchangeability of the parts can be improved, and the manufacturing cost is further saved.
Description
Technical field
The present invention relates to a kind of four stroke engine.
Background technique
As everyone knows, existing mini four-stroke motor generally all preferentially adopts integrated type to forge connecting rod, and this is because one of advantage that integrated type forges connecting rod is the intensity height, adapts to the high rotating speed operation of this type of motor; Next is to reinstall in the engine housing after connecting rod only needs just can be assembled into integral body (being the crankshaft-link rod piston assembly) together with bent axle and piston by crank pin and wrist pin because integrated type forges, assembling process is comparatively convenient, and can save the position of connecting-rod bolts, the reduction volume is so be adapted to the internal structure layout of this type of motor compactness.Certainly the assembling of above-mentioned bent axle Piston and rod assembly for convenience in practice, the casing of existing mini four-stroke motor only adopts following two kinds of structural types:
1, the casing mold joint adopts oblique plane type, and one of them bearing hole adopts split type.But this kind housing structure also is difficult to the control part precision owing to adopt oblique plane type certainly will increase manufacture cost, and because adopted split type bearing hole, must adopt combined type processing, has further increased difficulty of processing.And each bearing cap all must singly be joined no interchangeability.
2, casing is divided into upper and lower two-part along the bearing hole center, and this kind housing structure adds must adopt combined type processing, no interchangeability man-hour, the management of inconvenient component, maintainalbility is poor, and when wherein half casing was scrapped, the casing of second half that is complementary also must be scrapped with it.And component must match label, if obscure, certainly will cause whole motor cisco unity malfunction.
Summary of the invention
The present invention seeks to: provide a kind of assembling simple, component are easy to process, the four stroke engine of low cost of manufacture.
Technological scheme of the present invention is: a kind of four stroke engine, comprise left case lid, middle housing and the right case lid of fixed order, and the top of described middle housing is one-body molded cylinder block, and the piston in the cylinder block forges connecting rod by integrated type and links to each other with bent axle; And described left and right box covers and is equipped with the bearing support that is used to install crankshaft bearing, and first mold joint of described left case lid and middle housing is parallel to second mold joint of right case lid and middle housing, and all the line of centres with two crankshaft bearings is vertical for described first, second mold joint simultaneously.
Bent axle described in the present invention equally is divided into left crank, right crank and crank pin three parts with routine techniques, and it is fixing by crank pin and the assembling of left and right crank earlier that described integrated type forges connecting rod one end, and the other end fixes by wrist pin and piston more then.
The top of cylinder block described in the present invention is fixed with cylinder head, the position that described middle housing inherence is positioned at the cylinder block left side is provided with the cavity that is used to hold distribution device, described distribution device is a routine techniques, to no longer describing in detail among this present invention, but need be pointed out that further that the timing gear in the distribution device are fixed on the bent axle, and be meshed with cam wheel on being installed in the cylinder block sidewall.
Further, cylinder head described in the present invention is parallel with the line of centres of two crankshaft bearings with the three parting line of cylinder block.
The present invention is when concrete assembling, earlier integrated type is forged connecting rod, crankshaft and piston is assembled into single piece, then piston is adjusted to the lower dead center state, the size that need not to increase middle housing so just can be packed piston in the cylinder block on the middle housing, in the cavity of cylinder block one side, carry out the assembling of distribution device then, two crankshaft bearings by both sides after assembling finishes cover crankshaft installed to left and right box, and finish the fixing of left and right case lid and middle housing simultaneously, at last cylinder head is fixed on the cylinder block.
Advantage of the present invention is:
This four stroke engine provided by the invention has been simplified assembly process greatly by housing structure is improved, and because its component all need not combination processing, so improved the interchangeability of each component, has further saved manufacture cost.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is a sectional view of the present invention;
Fig. 2 is a stereochemical structure decomposing schematic representation of the present invention;
Fig. 3 is an assembly process schematic representation of the present invention.
Wherein: 1, middle housing; 1a, cylinder block; 2, left case lid; 3, right case lid; 4, crankshaft bearing; 5, bearing support; 6, piston; 7, integrated type forges connecting rod; 8, bent axle; 8a, left crank; 8b, right crank; 8c, crank pin; 9, wrist pin; 10, cylinder head; 11, timing gear; 12, cam wheel; A, first mold joint; B, second mold joint; C, three parting line.
Embodiment
Embodiment: in conjunction with Fig. 1, shown in Figure 2, this four stroke engine provided by the invention comprises left case lid 2, middle housing 1 and the right case lid 3 of fixed order, the top of described middle housing 1 is one-body molded cylinder block 1a, and the piston 6 in the cylinder block 1a forges connecting rod 7 by integrated type and links to each other with bent axle 8; And be equipped with the bearing support 5 that is used to install crankshaft bearing 4 on the described left and right case lid 2,3, and the first mold joint A of described left case lid 2 and middle housing 1 is parallel to the second mold joint B of right case lid 3 and middle housing 1, and all the line of centres with two crankshaft bearings 4 is vertical for described first, second mold joint A, B simultaneously.Described bent axle 8 is divided into left crank 8a, right crank 8b and crank pin 8c three parts, and it is fixing by crank pin 8c and left and right crank 8a, 8b assembling that described integrated type forges connecting rod 7 one ends, and the other end fixes by wrist pin 9 and piston 6.Described cylinder block 1a top is fixed with cylinder head 10, the position that described middle housing 1 inherence is positioned at cylinder block 1a left side is provided with the cavity that is used to hold distribution device, timing gear 11 in the described distribution device are fixed on the bent axle 8, and be meshed, and other component omission in the distribution device with cam wheel 12 on being installed in cylinder block 1a sidewall.Described cylinder head 10 is parallel with the line of centres of two crankshaft bearings 4 with the three parting line C of cylinder block 1a.
As shown in Figure 3, the present invention is when concrete assembling, earlier integrated type is forged connecting rod 7, bent axle 8 and piston 6 are assembled into single piece, then piston 6 is adjusted to the lower dead center state, the size that need not to increase middle housing 1 so just can be packed piston 6 in the cylinder block 1a on the middle housing 1, in the cavity of cylinder block 1 one sides, carry out the assembling (omitting this step among the figure) of distribution device then, two crankshaft bearings 4 by both sides after assembling finishes are mounted to a left side with bent axle 8, right case lid 2, on 3, and finish a left side simultaneously, right case lid 2,3 fixing with middle housing 1 are fixed to cylinder head 10 on the cylinder block 1a at last.
Certainly the foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.The all spirit of main technical schemes is done according to the present invention equivalent transformation or modification all should be encompassed within protection scope of the present invention.
Claims (5)
1. four stroke engine, it is characterized in that comprising left case lid (2), middle housing (1) and the right case lid (3) of fixed order, the top of described middle housing (1) is one-body molded cylinder block (1a), and the piston (6) in the cylinder block (1a) forges connecting rod (7) by integrated type and links to each other with bent axle (8); And be equipped with the bearing support (5) that is used to install crankshaft bearing (4) on the described left and right case lid (2,3), and first mold joint (A) of described left case lid (2) and middle housing (1) is parallel to second mold joint (B) of right case lid (3) and middle housing (1), and all the line of centres with two crankshaft bearings (4) is vertical for described first, second mold joint (A, B) simultaneously.
2. four stroke engine according to claim 1, it is characterized in that described bent axle (8) is divided into left crank (8a), right crank (8b) and crank pin (8c) three parts, it is fixing with left and right crank (8a, 8b) assembling by crank pin (8c) that described integrated type forges connecting rod (7) one ends, and the other end fixes by wrist pin (9) and piston (6).
3. four stroke engine according to claim 1 is characterized in that described cylinder block (1a) top is fixed with cylinder head (10), and the position that described middle housing (1) inherence is positioned at cylinder block (1a) left side is provided with the cavity that is used to hold distribution device.
4. four stroke engine according to claim 3 is characterized in that the timing gear (11) in the described distribution device are fixed on the bent axle (8), and is meshed with cam wheel (12) on being installed in cylinder block (1a) sidewall.
5. four stroke engine according to claim 3 is characterized in that described cylinder head (10) is parallel with the line of centres of two crankshaft bearings (4) with the three parting line (C) of cylinder block (1a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010177531 CN101881236A (en) | 2010-05-20 | 2010-05-20 | Four-stroke engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010177531 CN101881236A (en) | 2010-05-20 | 2010-05-20 | Four-stroke engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101881236A true CN101881236A (en) | 2010-11-10 |
Family
ID=43053339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010177531 Pending CN101881236A (en) | 2010-05-20 | 2010-05-20 | Four-stroke engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101881236A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1676905A (en) * | 2004-03-31 | 2005-10-05 | 本田技研工业株式会社 | Power plant including an internal combustion engine with a variable compression ratio system |
| CN101078366A (en) * | 2007-07-03 | 2007-11-28 | 济南轻骑发动机有限公司 | CG150 engine applying lightweight optimization and dynamic balance optimization technique |
| CN101235760A (en) * | 2008-02-26 | 2008-08-06 | 苏州市吴中区双马机电有限公司 | Four stroke OHC structure engine |
| CN201284695Y (en) * | 2008-10-28 | 2009-08-05 | 重庆万虎机电有限责任公司 | Detachable single-cylinder diesel engine |
| CN201671721U (en) * | 2010-05-20 | 2010-12-15 | 苏州市双马机电有限公司 | Four-stroke engine |
-
2010
- 2010-05-20 CN CN 201010177531 patent/CN101881236A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1676905A (en) * | 2004-03-31 | 2005-10-05 | 本田技研工业株式会社 | Power plant including an internal combustion engine with a variable compression ratio system |
| CN101078366A (en) * | 2007-07-03 | 2007-11-28 | 济南轻骑发动机有限公司 | CG150 engine applying lightweight optimization and dynamic balance optimization technique |
| CN101235760A (en) * | 2008-02-26 | 2008-08-06 | 苏州市吴中区双马机电有限公司 | Four stroke OHC structure engine |
| CN201284695Y (en) * | 2008-10-28 | 2009-08-05 | 重庆万虎机电有限责任公司 | Detachable single-cylinder diesel engine |
| CN201671721U (en) * | 2010-05-20 | 2010-12-15 | 苏州市双马机电有限公司 | Four-stroke engine |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101110 |