CN200958403Y - Four-stroke engine - Google Patents
Four-stroke engine Download PDFInfo
- Publication number
- CN200958403Y CN200958403Y CN 200620076751 CN200620076751U CN200958403Y CN 200958403 Y CN200958403 Y CN 200958403Y CN 200620076751 CN200620076751 CN 200620076751 CN 200620076751 U CN200620076751 U CN 200620076751U CN 200958403 Y CN200958403 Y CN 200958403Y
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- CN
- China
- Prior art keywords
- half chests
- bearing
- bent axle
- motor
- crankshaft
- Prior art date
- 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.)
- Expired - Fee Related
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- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to a four-stroke engine, and belongs to a power installation technical field, and is characterized in that: a cabinet body of an engine is composed of the mutual connection of a 1st half case and a 2nd half case at a parting surface, of which the parting surface is perpendicular to the center line of a cylinder drum through the center line of a crankshaft; the parting surface of the 1st and 2nd bearing pedestal is divided into the 1st and 2nd upper bearing pedestals and the 1st and 2nd lower bearing pedestals, which are arranged on the 1st and 2nd half cases in an integrated module respectively. The utility model is not interfered by an air door operating mechanism, because the distance of the 1st and 2nd bearing pedestal parts at the both ends of the bearing crankshaft is reduced, so that the bending moment on the crankshaft by the piston is reduced, so as to promote the durability of the crankshaft; the air door operating mechanism can be assembled easily; more lubricating oil fog can be spattered, so as to ensure the better lubrication of all parts of the crank guide and the air door operating mechanism, and accordingly to promote the service performance of the engine.
Description
Technical field
The utility model relates to a kind of four stroke engine, and specifically the mini four-stroke motor belongs to field of power equipment technology.
Background technique
At present, in the existing mini four-stroke motor, casing is interconnected at a mold joint place by first and second half chests and forms, and the axis of the prolongation of mold joint and bent axle first and second bearing supports is oblique to intersect.Being molded on first half chests of cylinder barrel and clutch shaft bearing seat integral body, being molded on second half chests of the second bearing support integral body.In the motor of this form, should reduce the distance between first and second bearings at supporting crankshaft two ends as much as possible, can effectively alleviate the moment of flexure that bent axle is produced because piston is applied to the load on the bent axle, to improve the durability of bent axle.
Yet in above-mentioned traditional motor, the valve operating mechanism that links to each other with bent axle is arranged in by the second half chests inner near.Therefore will reduce the distance between first and second bearing parts, valve operating mechanism is an obstacle.That is to say, at least one bearing part can not place the crank section near bent axle, because it is subjected to the obstruction of valve operating mechanism, when motor will assemble, the part of valve operating mechanism must be assembled to before first and second half chests link together on the bent axle temporarily, and therefore this motor is equipped with certain narrow limitation and difficulty.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, thereby a kind of distance between first and second bearing parts at supporting crankshaft two ends is reduced is provided and is not subjected to the interference of valve operating mechanism, thereby can improve the durability of bent axle; Valve operating mechanism can assemble after first and second half chests interconnect, and this can make the easier assembling of motor; Owing in the four stroke engine crankcase, installed and got rid of oily impeller, for motor provides a kind of good lubricating system, it can splash more lubricant mist when crankshaft operation, thereby lubricating between each component of air door operation chamber is provided reliably, guarantees the working life of each component.
Main solution of the present utility model is achieved in that
The utility model mainly comprises the casing of motor, the side cover that links to each other with the casing of motor; The casing of motor is made up of first half chests, second half chests; Be integral the cylinder barrel of formula with cylinder head, hold piston in this cylinder barrel, form the firing chamber between the bottom of cylinder head and piston-top surface, bent axle has a crank section to be connected with piston by connecting rod; Feature is first, second first bearing support that first half chests contains a supporting crankshaft bearings at both ends; Second half chests contains first, second bottom half-bearing seat of a supporting crankshaft bearings at both ends; First half chests and second half chests are interconnecting by the shaft axis of the clutch shaft bearing seat and second bearing support and the mold joint place of vertical gas cylinder barrel center line; By the bent axle shaft axis and perpendicular to the cylinder barrel centerline casing of motor is divided into first half chests and second half chests, the bent axle clutch shaft bearing seat and second bearing support are divided into first, second first bearing support and first, second bottom half-bearing seat, first, second first bearing support becomes whole being molded on first half chests, being molded on second half chests of first, second bottom half-bearing seat integral body, be connected side cover on the vertical outer side surface of first half chests and crankshaft axis, an air door operation chamber that holds valve operating mechanism is formed in the side of the side cover and first half chests.
The utility model gets rid of oily impeller by the axle installation on the sidewall of the bottom of the bent axle of motor accumulator.Get rid of oily impeller and when crankshaft operation, can splash more lubricant mist, thereby lubricating between each component of valve operating mechanism is provided reliably.
Fixed crankshaft timing gear on the utility model bent axle, one of bearing is arranged between crank section and the crankshaft timing gear.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; Be not subjected to the interference of valve operating mechanism because the distance between first and second bearing parts at supporting crankshaft two ends reduced, be applied to moment of flexure on the bent axle improving the durability of bent axle thereby reduced piston; Because valve operating mechanism is arranged in the outside of clutch shaft bearing, valve operating mechanism is assembled easily on the other hand; Get rid of oily impeller owing to having increased simultaneously, can more splash lubricant mist, guaranteed better to lubricate between each component of connecting rod and valve operating mechanism, and then improved the usability of motor, also guaranteed the working life of each component simultaneously.
Description of drawings
Fig. 1 is the longitudinal section of the utility model four stroke engine.
Fig. 2 is the sectional view of the utility model motor along the A-A line.
Fig. 3 is the sectional view of the utility model motor along the B-B line.
Embodiment:
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
The utility model is mainly by the casing 1 of motor, accumulator 2, first half chests 3, first first bearing support 4, second first bearing support 5, cylinder head 6, cylinder barrel 7, second half chests 8, the first bottom half-bearing seat 9, the second bottom half-bearing seat 10, bent axle 11, piston 12, firing chamber 13, crank section 14, connecting rod 15, intake valve 16, exhaust valve 17, spark plug 18, clutch shaft bearing seat 19, second bearing support 20, side cover 21, first collar 22, second collar 23, rolling bearing 24,25, air door operation chamber 26, axle 27, oil impeller 28, valve mechanism cover 29, valve operating mechanism 30, crankshaft timing gear 31, driven timing gear 32, driven shaft 33, cam 34, tappet 35, tappet axle 36; rocking arm 37; pitman arm shaft 38; push rod 39; valve spring 40; alarm mounting hole 41; lubricant oil alarm 42; hit spindle 43 bolts 44; generator 45; cooling fan 46; fan guard 47; oil sealing 48; compositions such as lubricant oil 49 and bolt 50.
The casing 1 of the utility model motor is by first half chests 3, second half chests 8 is formed, first half chests 3 is by first first bearing support 4, second first bearing support 5 and one and the 7 Unitarily molded formation of cylinder head 6 all-in-one-piece cylinder barrels, second half chests 8 is by accumulator 2, be bearing in the first bottom half-bearing seat 9 at bent axle 11 two ends, the 10 Unitarily molded formation of the second bottom half-bearing seat, above-mentioned cylinder barrel 7 can hold piston 12, between the bottom of cylinder head 6 and piston 12 end faces, form firing chamber 13, bent axle 11 has a crank section 14, and it links to each other with piston 12 by connecting rod 15, covers in 6 in firing chamber 13 upper cylinder intake valve 16 is installed, exhaust valve 17 and spark plug 18.First half chests 3, second half chests 8 interconnect at the mold joint place and form the casing 1 of motor.Above-mentioned mold joint is by bent axle 11 center lines and perpendicular to cylinder barrel 7 center lines, and the casing 1 of motor is divided into first half chests 3, second half chests 8; The crank section 14 of bent axle 11 is housed between the rolling bearing 24,25, and the both sides of close crank section 14 are provided with first, second collar 22,23, by rolling bearing 24,25 supporting crankshafts 11; First, second bearing support 19,20 that is bearing in first, second collar 22,23 is punished into first, second first bearing support 4,5 at mold joint, first, second bottom half-bearing part 9,10, first, second first bearing support 4,5 and first, second bottom half-bearing seat 9,10 all-in-one-piece respectively are molded on first and second half chests 3,8.Oil sealing 48 is installed in the outside at second bearing support 20.
Connect a side cover 21 on the outer surface of engine housing 1, this side cover 21 forms air door operation chamber 26 jointly with the outer surface of engine housing 1, is communicated with air door operation chamber 26 at the outside of clutch shaft bearing seat 19 accumulator 2.The sidewall of the top of air door operation chamber 26 by cylinder barrel 7 be stretched over cylinder head 6 above, 26 tops, air door operation chamber are sealed by valve mechanism cover 29, valve mechanism cover 29 is connected on cylinder head 6 upper surfaces.Valve operating mechanism 30 places air door operation chamber 26, the Unscrew by bent axle 11 and close intake valve 16 and exhaust valve 17.
Shown in Fig. 1,3: crankshaft timing gear 31 is fixed on clutch shaft bearing seat 19 bent axle 11 outward, and one of rolling bearing 24,25 is arranged between crank section 14 and the crankshaft timing gear 31.Crankshaft timing gear 31 is included in the valve operating mechanism 30; Driven timing gear 32 are contained on the driven shaft 33, and are driven by the velocity ratio of crankshaft timing gear 31 with 2: 1; Cam 34 and driven timing gear 32 are integral the formula structure, drive by driven timing gear 32 to rotate freely on driven shaft 33; A pair of valve tappet 35 is contained on the tappet axle 36, can drive by cam 34 to freely swing on tappet axle 36; A pair of rocking arm 37 is contained on the pitman arm shaft 38, and their end docks the head of intake valve 16 and exhaust valve 17 respectively; Pair of push rods 39 is connected to the other end of rocking arm on the tappet 35; Valve spring 40 is exerted pressure intake valve 16 and exhaust valve 17 toward closing direction.When the shock surface of cam 34 by valve tappet 35 upwards during propulsion arm 39, intake valve 16 and exhaust valve 17 are opened, when the basic circle face of cam during towards valve tappet 35, intake valve 16 and exhaust valve 17 are closed under the active force of valve spring 40.
Be equipped with by axle 27 on the sidewall of the bottom accumulator 2 of the bent axle 11 of motor and get rid of oily impeller 28, lubricant oil 49 is stored in accumulator 2 bottoms.A part of getting rid of oily impeller 28 is immersed in the lubricant oil 49, gets rid of oily impeller 28 and is driven by crankshaft timing gear 31, rotates freely on axle 27, is used for splash lubrication oil 49, thus each component in the lubricated air door operation chamber 26.In addition, in the bottom of accumulator 2, be provided with alarm mounting hole 41, lubricant oil alarm 42 is installed wherein.
The lower end that spindle 43 usefulness bolts 44 are fixed on connecting rod 15 will be hit, equally can splash lubrication oil 49, end at bent axle 11 is connected with generator 45, cooling fan 46 is fixed on the generator 45, be covered with fan guard 47 in the outside of cooling fan 46, the cylinder barrel 7 and the cylinder head 6 of the cooling air of cooling fan 46 guiding body can be cooled off above-mentioned parts.
During the assembling motor, rolling bearing 24,25 is installed on first, second collar 22,23 of bent axle 11, and pack into by first first bearing part 4, the first bottom half-bearing part 9, second first bearing part 5, the second bottom half-bearing part, 10 usefulness bolts 50 link together in formed first, second bearing support 19,20, again with first half chests 3, the locking of second half chests, 8 usefulness bolts, in the air door operation chamber 26 of then valve operating mechanism 30 being packed into.With bolt side cover 21 and valve mechanism cover 29 are connected on the body 1 of motor at last.Under motor first half chests 3, second half chests 8 were connected to each other together state, bent axle 11 was supported reliably like this, and valve operating mechanism is assembled easily.
Working principle of the present utility model and working procedure:
At the motor run duration, owing to expand or compression stroke, piston 12 applies a load by 15 pairs of bent axles of connecting rod, 11 crank portion 14, and the clutch shaft bearing seat 19 of this launched machine of loading, second bearing support 20 bear.Because this load on bent axle 11, particularly produces a moment of flexure between bearing support 19,20.But because the distance between the bearing support 19,20 is shorter, this moment of flexure is less.Because valve operating mechanism is arranged in the air door operation chamber 26 of clutch shaft bearing seat 19 outsides, and bearing support 19,20 is positioned near the two ends of crank portion 14, and be not subjected to the interference of valve operating mechanism 30, therefore the distance between the bearing support 19,20 is minimum, so it is minimum that moment of flexure can keep, this helps improving the durability of bent axle.
Inflammable gas in the utility model engine chamber 13 is because the acting of expanding promotes engine piston 12 to-and-fro motion, thereby drive bent axle 11 rotations through connecting rod 15, crankshaft timing gear 31 rotates in succession, and then drive driven timing gear 32 with 2: 1 velocity ratios, cam 34 rotations, drive rocking arm 37 swings through tappet 35 and push rod 39, control is advanced, exhaust valve 16,17 unlatching, when cam 34 rotates to the basic circle position, advance, exhaust valve 16,17 close under valve spring 40 effects automatically, thereby realize the work cycle process of motor, at the motor run duration, getting rid of oily impeller 28 is driven by crankshaft timing gear 31, because getting rid of oily impeller 28 parts is immersed in the lubricant oil 49, therefore getting rid of oily impeller 28 can upwards splash the lubricant oil in the accumulator 2 49, simultaneously and the spindle 43 that hits on the connecting rod 15 stir lubricant oil together, thereby with the oil that splashes and oil mist lubrication valve operating mechanism and other moving element.
When engine lubricating oil drops to when being lower than the regulation oil level, a machine oil alarm 42 that is installed on the accumulator 2 will send alarm signal, makes motor out of service, guarantees that motor is injury-free.
This four stroke engine is the distance that has shortened between the crankshaft support bearing part on the one hand, improved the durability of bent axle, on the other hand because valve operating mechanism is arranged in the outside of clutch shaft bearing, valve operating mechanism is assembled easily, get rid of oily impeller owing to increased by one simultaneously, can more splash lubricant mist, guarantee better to lubricate between each component of connecting rod and valve operating mechanism, and then improve the usability of motor.This structure be not limited to above-mentioned application example, also can be applicable to other four stroke engine.
Claims (3)
1, a kind of four stroke engine mainly comprises the casing (1) of motor, and with the side cover (21) that the casing (1) of motor links to each other, the casing of motor (1) is made up of first half chests (3), second half chests (8); Be integral the cylinder barrel (7) of formula with cylinder head (6), hold piston (12) in this cylinder barrel (7), form firing chamber (13) between the bottom of cylinder head (6) and piston (12) end face, bent axle (11) has a crank section (14) to be connected with piston (12) by connecting rod; It is characterized in that first half chests (3) contains first, second first bearing support (4,5) of supporting crankshaft bearings at both ends; Second half chests (8) contains first, second bottom half-bearing seat (9,10) of supporting crankshaft bearings at both ends; First half chests (3) and second half chests (8) are interconnecting by the shaft axis of clutch shaft bearing seat (4) and second bearing support (5) and the mold joint place of vertical gas cylinder barrel (7) center line; By bent axle (11) shaft axis and perpendicular to cylinder barrel (7) centerline the casing (1) of motor is divided into first half chests (3) and second half chests (8), bent axle clutch shaft bearing seat (19) and second bearing support (20) are divided into first, second first bearing support (4,5) with first, the second bottom half-bearing seat (9,10), first, second first bearing support (4,5) become whole being molded on first half chests (3), first, the second bottom half-bearing seat (9,10) integral body is molded on second half chests (8), be connected side cover (21) on the vertical outer side surface of first half chests (3) and bent axle (11) center line, side cover (21) is formed the air door operation chamber (26) that holds valve operating mechanism (30) with the side of first half chests (3).
2, four stroke engine according to claim 1 is characterized in that on the sidewall of bottom accumulator (2) of described bent axle (11) installing by axle (27) and gets rid of oily impeller (28).
3, four stroke engine according to claim 1 is characterized in that upward fixed crankshaft timing gear (31) of described bent axle (11), and one of bearing (24,25) is arranged between crank section (14) and the crankshaft timing gear (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620076751 CN200958403Y (en) | 2006-09-30 | 2006-09-30 | Four-stroke engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620076751 CN200958403Y (en) | 2006-09-30 | 2006-09-30 | Four-stroke engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200958403Y true CN200958403Y (en) | 2007-10-10 |
Family
ID=38785283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620076751 Expired - Fee Related CN200958403Y (en) | 2006-09-30 | 2006-09-30 | Four-stroke engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200958403Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427746C (en) * | 2006-09-30 | 2008-10-22 | 无锡开普动力有限公司 | Four-stroke engine |
-
2006
- 2006-09-30 CN CN 200620076751 patent/CN200958403Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427746C (en) * | 2006-09-30 | 2008-10-22 | 无锡开普动力有限公司 | Four-stroke engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071010 Termination date: 20091030 |