CN205423514U - Engine crankshaft - Google Patents
Engine crankshaft Download PDFInfo
- Publication number
- CN205423514U CN205423514U CN201620210865.5U CN201620210865U CN205423514U CN 205423514 U CN205423514 U CN 205423514U CN 201620210865 U CN201620210865 U CN 201620210865U CN 205423514 U CN205423514 U CN 205423514U
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- CN
- China
- Prior art keywords
- crank
- gear
- tooth
- double
- eccentric cam
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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.)
- Expired - Fee Related
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Abstract
The utility model relates to an engine crankshaft, including first crank, second crank, connecting rod, the big -end of connecting rod cover is equipped with eccentric cam, first crank, second crank pass through the crank pin cooperation with eccentric cam and are connected, first crank is the step cylinder body, is equipped with the crank gear of in -band tooth in the small circle cylinder periphery in the outside, and the crank gear fastens on the bent axle box of homonymy, has half round boss on the first crank inboard, is provided with double -deck gear in the boss, and tooth of double -deck gear one side and eccentric cam's tooth meshing cooperation, the tooth of double -deck gear opposite side pass the meshing cooperation of the through -hole that sets up and crank gear teeth in the crank periphery. The utility model has the advantages of simple structure, with low costs, the reliability is high, realizes not wasting the pressure scaling of engine with few spare part, and need not carry out great change to the engine body structure.
Description
Technical field
This utility model relates to engine art, specifically a kind of engine crankshaft mechanism.
Background technology
Engine crankshaft is the main rotary gadget of engine, and after loading onto connecting rod, upper and lower (back and forth) motion that can accept connecting rod becomes circulation (rotation) motion.Bent axle is the important parts on electromotor, and its material is made up of carbon structural steels or spheroidal graphite cast-iron, has two significant points: trunnion, rod journal, (also other).Trunnion is installed on cylinder body, and connecting rod neck is connected with crank pin end pore, and connecting rod small end hole is connected with steam-cylinder piston, is a typical slider-crank mechanism.The lubrication of bent axle is primarily referred to as the lubrication with big end bearing shell and crank-shaft link neck and the lubrication of two fixing point, and the rotation of bent axle is the power source of electromotor, is also the driving source of whole mechanical system.
The compression ratio of cylinder has considerable influence to the performance of explosive motor.Compression ratio is exactly the degree that engine mixed gas body is compressed, and holding is stable and suitable compression ratio just can make the operating of electromotor be smoothed out and stablize.Compression ratio and engine performance have much relations, and the electromotor of high compression ratio means that to have bigger power output.Generally, on the premise of there is not pinking in guaranteeing cylinder, raising compression ratio as far as possible, the beneficially raising of engine performance.The when that at present crank mechanism existing cylinder piston igniting, piston moves down with the skew of bent axle, under change waste compression ratio, kinetic equation loss is big, the shortcoming causing too low efficiency of combustion.
The Patents improving compression ratio technique at present is a lot, technological approaches also has a variety of, adds accentric support, movable air cylinder cap method and oscillating cylinder set method etc. as arranged on combustor completion method, variable piston, multi link method, gear type connecting rod, piston pin on the rod journal of accentric support set, bent axle.But realize improving compression ratio function by change crank structure and labour-saving document is fewer.
Utility model content
The purpose of this utility model is to propose a kind of simple in construction, reliability height, low cost of manufacture, can be directly applied on existing electromotor, and just can solve, without engine block structure being carried out the biggest change, the compression ratio loss problem that available engine spark delay brings.
This utility model engine crankshaft specifically includes that the first crank, the second crank, connecting rod, described big end is set with eccentric cam, eccentricity value required for eccentric cam can be by the stroke of engine piston, calculate when bent axle deflects 10 degree and make, the rotation of eccentric cam plays a part to change big end movement locus, and the bent axle eccentric cam that turns around also synchronizes to turn around and just can translate on the track that original big end moves by drivening rod major part.Described first crank, the second crank are connected by crankpin with eccentric cam, described first crank is stepped cylindrical body, the small cylinder periphery in outside is provided with the crank gear of band internal tooth, and crank gear is anchored on the crankcase of homonymy, inside the first crank on have a semi-circular boss.Double-layer gear it is provided with in boss, the tooth of double-layer gear side engages cooperation with the tooth of eccentric cam, the tooth of double-layer gear opposite side engages cooperation through the through hole of setting on crank periphery with the tooth of crank gear, plays a part to determine eccentric cam direction of rotation and regulation rotating speed.The double-layer gear arranged on crank is made to engage cooperation with the crank gear tooth being fastened on crankcase when utilizing crank rotation, and the rotation of eccentric cam on drivening rod, the bent axle eccentric cam that circles circles, when making bent axle up time rotate 10 degree, piston is positive top dead centre, makes correct timed ignition truly.
Described semi-circular boss is bolted on crank
Described double-layer gear pin is fixed on crank.
Operation principle of the present utility model is:
Crankshaft eccentric cam turns over certain angle, and the axial location of bent axle changes, and the position of piston top dead center changes therewith, and the center deflection of eccentric cam, the telescopic scope of big end also becomes big, corresponding the most laborsaving during workmanship.
The beneficial effects of the utility model are:
1., relative at present other engine crankshaft mechanism, simple in construction of the present utility model, low cost, reliability is high, realizes not wasting the compression ratio of electromotor with few parts, carries out bigger change without to engine block structure.
2. the telescopic scope of big end also becomes big, and motor head can pass out more high pulling torque, corresponding the most laborsaving during workmanship, vibrates less, and engine efficiency is higher.
3. strengthen ignition advance angle and ensure that piston, at the abundant all burnt of top dead centre, discharges more environmentally friendly.
Accompanying drawing explanation
Fig. 1 is cross-sectional view of the present utility model；
Fig. 2 is structural representation of the present utility model；
Fig. 3 is gear mesh schematic representation of the present utility model；
In figure: the first crank-1, the second crank-2, connecting rod-3, big end-4, eccentric cam-5, tooth 51, crankpin-6, small cylinder-7, crank gear-8, internal tooth-81, bent axle-9, semi-circular boss 10, double-layer gear 11, tooth-111, tooth-112, pin-12, through hole-13, needle bearing-14, bolt hole-15.
Detailed description of the invention
Further illustrate this utility model below in conjunction with the accompanying drawings.It should be noted that this utility model is not limited exemplary embodiment in the accompanying drawings by this specification, and cover by the various replacements within the scope of this utility model described in claims, amendment, equivalents.
As long as have employed improvement or the most improved other occasion that is directly used in that method of the present utility model design is carried out with technical scheme, all within the scope of this utility model is protected.
nullSuch as Fig. 1、Fig. 2、Shown in Fig. 3，This utility model engine crankshaft includes the first crank 1、Second crank 2，Connecting rod 3，Described big end 4 is set with eccentric cam 5，Described first crank 1、Second crank 2 is connected by crankpin 6 with eccentric cam 5，Needle bearing 14 is set on crankpin 6，It is also equipped with needle bearing between big end 4 and eccentric cam，Eccentric cam 5 is rotatable，Described first crank 1 is stepped cylindrical body，The crank gear 8 of band internal tooth 81 it is combined with on small cylinder 7 periphery in outside，Crank gear 8 is provided with bolt hole 15，Crank gear 8 is bolted to (not shown) on the main spindle box of homonymy，A semi-circular boss 10 is had inside first crank 1，Semi-circular boss 10 is bolted on crank 1，Double-layer gear 11 it is provided with in boss 10，Double-layer gear 11 pin 12 is fixed on the first crank 1，Pin 12 is outside equipped with needle bearing，Double-layer gear 11 can rotate，The tooth 111 of double-layer gear side engages cooperation with the tooth 51 of eccentric cam，First crank 1 periphery is additionally provided with through hole 13，The tooth 112 of double-layer gear opposite side through this through hole 13 and crank gear tooth 81 engage cooperation，Crank 1 rotates a circle，Double-layer gear 11 is driven to rotate，Double-layer gear 11 rotarily drives eccentric cam 5 and rotates a circle.In the present embodiment, the setting of needle bearing is the smooth pivotal realizing gear.It addition, according to present embodiment, be equipped with oilhole to lubricate the structural component including needle bearing etc..
This utility model is improved by the structure arranging eccentric cam and crank on connecting rod and adds gear, 10 ° about-15 °, crankshaft center position of bent axle deflection is kept during piston igniting, cam revolves the position that can move down with compensation link major part when turning around and does not waste compression ratio, fuel-efficient laborsaving, increase engine efficiency.
This utility model is not restricted to the embodiment described, and without departing from the scope of the appended claims, may be made that many other change and amendment or conversion.
Claims (3)
1. an engine crankshaft, it is characterised in that: including the first crank, the second crank and connecting rod, described big end is set with eccentric cam, and described first crank, the second crank are connected by crankpin with eccentric cam；Described first crank is stepped cylindrical body, the small cylinder periphery in outside is provided with the crank gear of band internal tooth, crank gear is anchored on the crankcase of homonymy, a semi-circular boss is had on inside first crank, double-layer gear it is provided with in boss, the tooth of double-layer gear side engages cooperation with the tooth of eccentric cam, and the tooth of double-layer gear opposite side engages cooperation through the through hole of setting on crank periphery with the tooth of crank gear.
Engine crankshaft the most according to claim 1, it is characterised in that: described semi-circular boss is bolted on the first crank.
Engine crankshaft the most according to claim 1, it is characterised in that: described double-layer gear pin is fixed on crank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620210865.5U CN205423514U (en) | 2016-03-18 | 2016-03-18 | Engine crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620210865.5U CN205423514U (en) | 2016-03-18 | 2016-03-18 | Engine crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205423514U true CN205423514U (en) | 2016-08-03 |
Family
ID=56520356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620210865.5U Expired - Fee Related CN205423514U (en) | 2016-03-18 | 2016-03-18 | Engine crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205423514U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605081A (en) * | 2016-03-18 | 2016-05-25 | 蔡建龙 | Engine crankshaft |
-
2016
- 2016-03-18 CN CN201620210865.5U patent/CN205423514U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605081A (en) * | 2016-03-18 | 2016-05-25 | 蔡建龙 | Engine crankshaft |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20170318 |