CN104329168A - Engine cylinder piston upper stopping point locking mechanism - Google Patents
Engine cylinder piston upper stopping point locking mechanism Download PDFInfo
- Publication number
- CN104329168A CN104329168A CN201410453644.6A CN201410453644A CN104329168A CN 104329168 A CN104329168 A CN 104329168A CN 201410453644 A CN201410453644 A CN 201410453644A CN 104329168 A CN104329168 A CN 104329168A
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- hole
- flywheel
- camshaft
- cylinder piston
- gear chamber
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Abstract
The invention discloses an engine cylinder piston upper stopping point locking mechanism. According to the technical scheme, a through hole is formed in the lower end of a flywheel shell, a blind hole with the same inner diameter with the through hole is formed in the plane of a flywheel, when the through hole and the blind hole of a cylinder piston are located at an upper stopping point position, the centers of the two holes are located on the same axis, and a flywheel locking pin penetrates through the through hole of the flywheel shell and is inserted into the blind hole of the flywheel. A through hole is also formed in a camshaft gear, a blind hole of the same inner diameter is formed in the corresponding position of the camshaft gear through hole in a gear chamber, and a screw through hole is formed in the gear chamber cover. When the three holes of the cylinder piston are located at the upper stopping point position, the centers of the three holes are located on the same axis, and a camshaft locking pin penetrates through the gear chamber cover and the camshaft gear and is inserted into the gear chamber. The structure can be used for conveniently and accurately finding the engine cylinder piston upper stopping point position and locking, so that components can be more accurately assembled later, and the great working time cost is reduced.
Description
Technical field
The invention belongs to Structure of Internal-Combustion Engine, be specifically related to a kind of structure determining motor one cylinder piston top dead center position.
Background technique
In engine building, determine that motor one cylinder piston top dead center position is extremely important, often adopt gage measuring or visual method.Detailed process is: rotary crankshaft during engine assembly, gives prominence to the height of plane on body, check whether a cylinder piston reaches extreme higher position by plane on gage measuring one cylinder piston.Then assemble driving gear and distribution device thereof, finally on gear chamber cover, relevant position printing top dead center and injection timing engrave.Because the measurer measuring piston projecting height is precision measuring tool, measuring accuracy is 0.01mm, the angle of swing that piston be made accurately to reach top dead center position need constantly to adjust bent axle, more time-consuming, and this method cannot ensure assembly precision.
In addition, carry out in maintenance process at motor, after mostly first motor one cylinder piston being adjusted to top dead center position, carry out follow-up work again.If when running into the situation needing to change driving gear, the drive connection between camshaft and bent axle disconnects.Because engine valve actuating mechanism has, exhaust valve early leaves, the logical relation of intake valve pass in evening, and inlet and exhaust valve spring exists pressure, causes rocking motion and causes camshaft to relatively rotate.Like this problems such as assembling difficulty or port timing mistake will occur when assembling new gear, must open cylinder head cover and camshaft be rotated to tram, correct for all driving gears could be in place, therefore this work is wasted time and energy.
If a kind of mechanism can be provided, can either ensure that motor is in assembly process, convenient and swift and find a cylinder piston top dead center position accurately and locking, can ensure in maintenance process that again the phase place between camshaft and bent axle does not change, be then the maximum technical need of the industry, proposition of the present invention can make above problem effectively be solved.
Summary of the invention
The object of this invention is to provide a kind of can either be convenient and swift and accurately find motor one cylinder piston top dead center position again can by the project organization of the phase place locking between camshaft and bent axle.
The technological scheme taked for realizing object of the present invention is: be provided with a through hole in the lower end of flywheel casing, the plane of flywheel is provided with a blind hole identical with this through hole internal diameter, through hole and blind hole are when a cylinder piston is in top dead center position, two holes be centrally located at same axis, now flywheel lock pin through flywheel casing through hole insert flywheel blind hole in.Camshaft gear wheel is provided with a through hole, the position that gear chamber is corresponding with camshaft gear wheel through hole is provided with the blind hole of a same inner diameter, gear chamber cover is provided with a tapped through hole.When these three Kong Yi cylinder pistons described are in top dead center position, three holes be centrally located at same axis, now camshaft lock pin inserts in gear chamber through gear chamber cover and camshaft gear wheel.
Motor one cylinder piston top dead center locking is divided into two parts: one is the flywheel locking motor; Another is the gear on lock tab wheel shaft.Because flywheel casing opposite engine body is motionless, and the relative body of flywheel is motion, so when flywheel lock pin is inserted flywheel through flywheel casing, make not relatively rotate between flywheel and flywheel casing to reach locking object.In like manner, when being inserted in gear chamber through gear chamber cover and camshaft gear wheel by another camshaft lock pin, camshaft gear wheel has just been limited between gear chamber cover and gear chamber, to make between three without relative movement to reach locking object.
Feature of the present invention and beneficial effect are: structure is simple, and practicability is very strong, and easily processes.The position locking of accurately finding motor one cylinder piston top dead center can be facilitated, make the follow-up component of motor assemble more accurate.This keying structure energy convenient for maintaining saves a large amount of work time cost simultaneously.
Accompanying drawing explanation
Shown accompanying drawing is Principles and methods schematic perspective view of the present invention.
Embodiment
Structure of the present invention to be described further by specific embodiment below in conjunction with accompanying drawing.Motor one cylinder piston top dead center lockable mechanism comprises: engine flywheel, flywheel casing, gear chamber, camshaft gear wheel, gear chamber cover, flywheel lock pin and camshaft lock pin etc.Its structure is respectively provided with a lock pin at flywheel section and cammed shaft portion, for flywheel gear and the camshaft of fixing rotation.Specifically: the lower end of flywheel casing 2 is provided with a through hole 8-1, the plane of flywheel 1 is provided with a blind hole 8-2 identical with this through hole internal diameter, through hole and blind hole are when a cylinder piston is in top dead center position, two holes be centrally located at same axis, now flywheel lock pin 6 inserts in the blind hole of flywheel through the through hole of flywheel casing.Camshaft gear wheel 4 is provided with a through hole 8-3; The position that gear chamber 3 is corresponding with camshaft gear wheel through hole is provided with the blind hole 8-4 of a same inner diameter, gear chamber cover 5 is provided with a tapped through hole 8-5.When these three Kong Yi cylinder pistons are in top dead center position, three holes be centrally located at same axis, now camshaft lock pin 7 inserts in gear chamber through gear chamber cover and camshaft gear wheel.
The diameter of flywheel casing lower end through hole 8-1 is 10mm; The diameter of the blind hole 8-2 on flywheel is 10mm, the upper deviation+0.092mm; Lower deviation+0.056mm, the degree of depth is 10mm.Flywheel lock pin is cylindrical, and external diameter is 10mm.The diameter of gear chamber 8-4 blind hole is 6mm, the upper deviation+0.094mm; Lower deviation+0.046mm, the degree of depth is 11.5mm.
The diameter of camshaft gear wheel through hole 8-3 is 6mm; On gear chamber cover, the specification of tapped through hole 8-5 is M12 × 1.5mm.Camshaft lock pin 7 is cylindrical, and external diameter is 6mm.
Two lock pin insertion portions are cylindrical, and front end is slightly with taper and corresponding chamfering, and to make lock pin conveniently can insert locking hole, its lock pin rear end is flat pattern, and person plugs lock pin to be mainly used in easy-to-operat.
In engine gear case, have multiple driving gear, but wherein only have camshaft gear wheel to engage with camshaft, camshaft and flywheel fit together coaxial rotation, as long as so flywheel and camshaft gear wheel are fixed, the camshaft of motion just can be made to fix.Key is when will determine that motor one cylinder piston is in the position of top dead center and is fixed, and could assemble other many parts of motor.
On gear chamber cover, why the internal diameter of tapped through hole is greater than the diameter of camshaft gear wheel through hole and gear chamber blind hole, because need to be full of machine oil in gear chamber after engine assembly, all after the assembling of (after determining the position of motor one cylinder piston top dead center) other parts, pull down camshaft lock pin, a thread plug is installed and seals (machine oil).When therefore determining the position of motor one cylinder piston top dead center, gear chamber blind hole and flywheel blind hole coordinate (location) size outbalance, so the processing of blind hole all gives upper and lower deviation with two lock pins.
After the assembling of engine body, bent axle, flywheel, flywheel casing, camshaft and camshaft gear wheel on a production line, rotary crankshaft, to the position of flywheel and camshaft gear wheel control hole, inserts two lock pins.Now namely determine the position of a cylinder piston top dead center and locking, and the assembling of subsequent parts can be carried out, after parts all assemble, pull up lock pin.
When engine maintenance need change driving gear, before disengage gear, when first rotary crankshaft to flywheel and camshaft gear wheel can insert the position of lock pin simultaneously, insert two lock pins, and then carry out dismounting and the replacing of gear.Would not occur that distribution dispiration is by mistake and the problem such as assembling difficulty like this, and eliminate and open cylinder head cover, unclamp rocking arm bolt, adjust the processes such as the position of camshaft gear wheel again, time saving and energy saving and save a large amount of work time cost.
Claims (4)
1. motor one cylinder piston top dead center lockable mechanism, comprise: engine flywheel, flywheel casing, gear chamber, camshaft gear wheel, gear chamber cover, flywheel lock pin and camshaft lock pin, it is characterized in that: the lower end of flywheel casing (2) is provided with a through hole (8-1), the plane of flywheel (1) is provided with a blind hole identical with this through hole internal diameter (8-2), through hole and blind hole are when a cylinder piston is in top dead center position, two holes be centrally located at same axis, now flywheel lock pin (6) inserts in the blind hole of flywheel through the through hole of flywheel casing, camshaft gear wheel (4) is provided with a through hole (8-3), the position that gear chamber (3) is corresponding with camshaft gear wheel through hole is provided with the blind hole (8-4) of a same inner diameter, gear chamber cover (5) is provided with tapped through hole (8-5), when described three Kong Yi cylinder pistons are in top dead center position, three holes be centrally located at same axis, now camshaft lock pin (7) inserts in gear chamber through gear chamber cover and camshaft gear wheel.
2. according to motor one cylinder piston top dead center lockable mechanism according to claim 1, it is characterized in that: the diameter of described flywheel casing lower end through hole (8-1) is 10mm, the diameter of the blind hole (8-2) on described flywheel is 10mm, the upper deviation+0.092mm; Lower deviation+0.056mm, the degree of depth is 10mm, and described flywheel lock pin (6) is for cylindrical, and external diameter is 10mm.
3., according to motor one cylinder piston top dead center lockable mechanism according to claim 1, it is characterized in that: the diameter of described gear chamber (8-4) blind hole is 6mm, the upper deviation+0.094mm; Lower deviation+0.046mm, the degree of depth is 11.5mm.
4., according to the motor one cylinder piston top dead center lockable mechanism described in claim 1 or 3, it is characterized in that: the diameter of described camshaft gear wheel through hole (8-3) is 6mm; The specification of the tapped through hole (8-5) on gear chamber cover is M12 × 1.5mm; Described camshaft lock pin (7) is for cylindrical, and external diameter is 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410453644.6A CN104329168A (en) | 2014-09-05 | 2014-09-05 | Engine cylinder piston upper stopping point locking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410453644.6A CN104329168A (en) | 2014-09-05 | 2014-09-05 | Engine cylinder piston upper stopping point locking mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104329168A true CN104329168A (en) | 2015-02-04 |
Family
ID=52403958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410453644.6A Pending CN104329168A (en) | 2014-09-05 | 2014-09-05 | Engine cylinder piston upper stopping point locking mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN104329168A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344941A (en) * | 2018-04-03 | 2019-10-18 | 上海汽车集团股份有限公司 | The locking method and structure of crankshaft timing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0071972B1 (en) * | 1981-08-07 | 1985-10-09 | Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 | Method and device for adjusting the valve drive of an internal-combustion engine, especially a diesel engine |
| EP0362687A1 (en) * | 1988-09-28 | 1990-04-11 | Klöckner-Humboldt-Deutz Aktiengesellschaft | Valve timing setting system for an internal-combustion engine the camshaft of which is driven by a belt, a chain or a gear |
| US20060213045A1 (en) * | 2003-05-30 | 2006-09-28 | Calviti Caetano M A | Internal combustion engine and an engine housing |
| CN201057064Y (en) * | 2007-06-25 | 2008-05-07 | 潍柴动力股份有限公司 | Camshaft gear timing device of engine |
| CN202300562U (en) * | 2011-09-07 | 2012-07-04 | 东风康明斯发动机有限公司 | Valve timing inspection mechanism for engine |
| CN103422928A (en) * | 2013-07-18 | 2013-12-04 | 东风朝阳朝柴动力有限公司 | Diesel engine timing locating method |
| CN203585203U (en) * | 2013-12-04 | 2014-05-07 | 北京汽车动力总成有限公司 | Flywheel timing point aligning structure of car engine |
-
2014
- 2014-09-05 CN CN201410453644.6A patent/CN104329168A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0071972B1 (en) * | 1981-08-07 | 1985-10-09 | Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 | Method and device for adjusting the valve drive of an internal-combustion engine, especially a diesel engine |
| EP0362687A1 (en) * | 1988-09-28 | 1990-04-11 | Klöckner-Humboldt-Deutz Aktiengesellschaft | Valve timing setting system for an internal-combustion engine the camshaft of which is driven by a belt, a chain or a gear |
| US20060213045A1 (en) * | 2003-05-30 | 2006-09-28 | Calviti Caetano M A | Internal combustion engine and an engine housing |
| CN201057064Y (en) * | 2007-06-25 | 2008-05-07 | 潍柴动力股份有限公司 | Camshaft gear timing device of engine |
| CN202300562U (en) * | 2011-09-07 | 2012-07-04 | 东风康明斯发动机有限公司 | Valve timing inspection mechanism for engine |
| CN103422928A (en) * | 2013-07-18 | 2013-12-04 | 东风朝阳朝柴动力有限公司 | Diesel engine timing locating method |
| CN203585203U (en) * | 2013-12-04 | 2014-05-07 | 北京汽车动力总成有限公司 | Flywheel timing point aligning structure of car engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344941A (en) * | 2018-04-03 | 2019-10-18 | 上海汽车集团股份有限公司 | The locking method and structure of crankshaft timing |
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Application publication date: 20150204 |
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