CN204082247U - A kind of lift range variable regulating device - Google Patents
A kind of lift range variable regulating device Download PDFInfo
- Publication number
- CN204082247U CN204082247U CN201420297095.3U CN201420297095U CN204082247U CN 204082247 U CN204082247 U CN 204082247U CN 201420297095 U CN201420297095 U CN 201420297095U CN 204082247 U CN204082247 U CN 204082247U
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- China
- Prior art keywords
- shaft part
- valve
- shaft
- rolling wheel
- regulating device
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of lift range variable regulating device, comprise camshaft, cam, valve rocker, valve, the roller contacted with cam is equipped with in valve rocker one end, and rolling wheel installing shaft is divided into three sections, middle shaft part and two ends shaft part relative eccentric, and the parts that rolling wheel installing shaft can be rotated around its axis; Achieve the continuous adjustment of valve lift, its structure is simple, compact, and cost is low, and it is convenient to realize, and reliability is high, improves Economy and the discharge of motor.
Description
Technical field
A kind of lift range variable regulating device, is particularly equipped with the lift range variable regulating device of single cylinder dual valve motor motorcycle.
background technique
Four stroke engine comprises air inlet, compression, acting, exhaust four working procedure, and for top-mounted air distribution mechanism, inlet and outlet process acts on valve rocker according to port timing by distribution cam axle, and valve rocker drives valve and opens valve; The size that valve is opened is determined by valve lift.The valve lift of traditional motor is changeless, the size of valve lift affects the number of inlet and outlet amount, the inlet and outlet amount that engine operating condition difference needs is also different, and valve lift immobilizes, inlet and outlet amount is constant, can have influence on the power character of motor, Economy and discharge.At present, some four-stroke motors adopt lift range variable technology, is generally two-stage type, be i.e. maximum valve lift and minimum valve long-range two states; Valve lift adjust structure is complicated, and manufacture cost is high.
summary of the invention
The utility model provides a kind of valve lift regulating device, and can realize the continuous adjustment of valve lift, it is simple and compact for structure, and cost is low, and it is convenient to realize, and reliability is high, improves Economy and the discharge of motor.
The technical solution adopted in the utility model:
A kind of lift range variable regulating device, comprise camshaft 1, cam 2, valve rocker 3, valve 4, the roller 5 contacted with cam 2 is equipped with in valve rocker one end, rolling wheel installing shaft is divided into three sections, two ends shaft part is arranged in the axis hole of valve rocker end with one heart, roller 5 is sleeved on middle shaft part 6, described middle shaft part 6 and two ends shaft part 7 relative eccentric; Lift range variable regulating device also comprises the parts that rolling wheel installing shaft can be rotated around its axis, under the driving of described parts, make rolling wheel installing shaft rotate, opposite end shaft part has eccentric jack shaft length of tape and moves roller and produce upper and lower displacement, otherwise becomes large to the valve lift that diminishes of valve lift during top offset.
The described parts that rolling wheel installing shaft can be rotated around its axis comprise the fork 8, the spring on fork top, the flexible connection cap 9 that are arranged on described installation shaft one end, the described spring of suit and fork in described flexible connection cap; The outer end of described flexible connection cap 9 is connected with stepper motor 10, Returnning spring is housed between the two.
Described valve rocker roller mounting end comprises two ends " U " shape hole that Open Side Down respectively, and the opening slot between two holes; The two ends shaft part of described rolling wheel installing shaft is arranged in " U " shape hole, and described middle shaft part and roller are arranged in opening slot.
The diameter of axle of described rolling wheel installing shaft two ends shaft part 7 is greater than middle shaft part 6; Middle shaft part 6 is flexibly connected by spline with the shaft part installing fork one end, is fixedly connected with the other end shaft part.
The method of described lift range variable adjustment, when engine start or rotating speed low time, stepper motor 10 controls fork 8 and is positioned at initial position, and valve lift adjustment increment is minimum; Along with the raising of rotating speed, stepper motor 10 makes fork 8 turn an angle, and rolling wheel installing shaft exists eccentric structure, and middle shaft part produces displacement towards the direction of camshaft, and under the drive of camshaft, valve lift adjustment increment increases thereupon; When during engine speed is in or high speed time, step motor control fork is positioned at neutral position or ultimate position, valve lift adjustment increment reach half about or maximum.
The present invention compared with the prior art, has following beneficial effect:
Realize the continuous setup of valve lift, structure is simple, compact, low cost of manufacture, controls easy, improves Economy and the discharge of motor.
Accompanying drawing explanation
Fig. 1 is lift range variable regulating device decomposing schematic representation.
In figure, 1, camshaft; 2, cam; 3, valve rocker; 4, valve; 5, roller; 6, shaft part in the middle of rolling wheel installing shaft; 7-1, rolling wheel installing shaft two ends shaft part one; 7-2, rolling wheel installing shaft two ends shaft part two; 8, fork; 9, cap is flexibly connected; 10, stepper motor.
Embodiment
As shown in Figure 1, when engine start or the slow-speed of revolution, stepper motor is not energized, and fork is positioned at initial position under the effect of Returnning spring.Fork controls the eccentric position of the middle shaft part of roller relative to two ends shaft part away from camshaft 1, camshaft 1 rotates, the roller 5 contacted with cam 2 is equipped with in valve rocker 3 one end, the roller of the cam 2 jack-up valve rocker one end on camshaft 1; valve is opened by the other end of rocking arm, now valve lift adjustment increment is minimum.Fork, also with valve rocker shake, overcomes spring force and moves up and down in flexible connection cap.Along with the raising of engine speed, control section is according to the rotating speed of motor, and to stepper motor energising, electrical pulse number determines the stepping step number of stepper motor; Motor drives fork, and in the middle of fork swings and drives roller, shaft part rotates towards the direction close to camshaft 1 relative to the eccentric position of two ends shaft part; Camshaft 1 rotates, and the roller 5 contacted with cam 2 is equipped with in valve rocker 3 one end, the roller of the cam 2 jack-up valve rocker one end on camshaft 1, and valve is opened by the other end of rocking arm, and now valve lift adjustment increment strengthens gradually.When rotating speed reaches maximum, control section, according to the rotating speed of motor, continues energising to stepper motor, and electrical pulse number increases; Motor drives fork, and in the middle of fork swings and drives roller, shaft part is relative to the eccentric position of two ends shaft part, turns to ultimate position towards the direction close to camshaft 1; Camshaft 1 rotates, and the roller 5 contacted with cam 2 is equipped with in valve rocker 3 one end, the roller of the cam 2 jack-up valve rocker one end on camshaft 1, and valve is opened by the other end of rocking arm, and now valve lift adjustment increment reaches maximum.Engine speed reduces, and stepper motor drives rocking bar reversing motion, and valve lift adjustment increment reduces relatively; When engine speed is in idling, stepper motor power-off, rocking bar gets back to initial position under the effect of Returnning spring.
Claims (4)
1. a lift range variable regulating device, comprise camshaft (1), cam (2), valve rocker (3), valve (4), the roller (5) contacted with cam (2) is equipped with in valve rocker one end, it is characterized in that: described rolling wheel installing shaft is divided into three sections, two ends shaft part is arranged in the axis hole of valve rocker end with one heart, roller housing is contained on middle shaft part (6), described middle shaft part (6) and two ends shaft part (7) relative eccentric; Described lift range variable regulating device also comprises the parts that rolling wheel installing shaft can be rotated around its axis, under the driving of described parts, make rolling wheel installing shaft rotate, opposite end shaft part has eccentric jack shaft length of tape and moves roller and produce upper and lower displacement, otherwise becomes large to the valve lift that diminishes of valve lift during top offset.
2. lift range variable regulating device as claimed in claim 1, it is characterized in that: described in rolling wheel installing shaft can be rotated around its axis parts comprise be arranged on described installation shaft one end fork (8), fork top spring, be flexibly connected cap (9), the described spring of suit and fork in described flexible connection cap (9); The outer end of described flexible connection cap is connected with stepper motor (10), Returnning spring is housed between the two.
3. lift range variable regulating device as claimed in claim 1 or 2, is characterized in that: described valve rocker roller mounting end comprises two ends " U " shape hole that Open Side Down respectively, and the opening slot between two holes; The two ends shaft part of described rolling wheel installing shaft is arranged in " U " shape hole, and described middle shaft part and roller are arranged in opening slot.
4. lift range variable regulating device as claimed in claim 1 or 2, is characterized in that: the diameter of axle of described rolling wheel installing shaft two ends shaft part (7) is greater than middle shaft part (6); Middle shaft part (6) is flexibly connected by spline with the shaft part installing fork one end, is fixedly connected with the other end shaft part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420297095.3U CN204082247U (en) | 2014-06-04 | 2014-06-04 | A kind of lift range variable regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420297095.3U CN204082247U (en) | 2014-06-04 | 2014-06-04 | A kind of lift range variable regulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204082247U true CN204082247U (en) | 2015-01-07 |
Family
ID=52174976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420297095.3U Expired - Fee Related CN204082247U (en) | 2014-06-04 | 2014-06-04 | A kind of lift range variable regulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204082247U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868944A (en) * | 2017-05-09 | 2018-11-23 | 牛锦辉 | Engine variable valve lift device |
| CN116220853A (en) * | 2022-12-30 | 2023-06-06 | 东风商用车有限公司 | Gear-type valve lift variable mechanism and lift gear control method |
-
2014
- 2014-06-04 CN CN201420297095.3U patent/CN204082247U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868944A (en) * | 2017-05-09 | 2018-11-23 | 牛锦辉 | Engine variable valve lift device |
| CN116220853A (en) * | 2022-12-30 | 2023-06-06 | 东风商用车有限公司 | Gear-type valve lift variable mechanism and lift gear control method |
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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: 20150107 Termination date: 20180604 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |