CN206299420U - A kind of rocker-arm continuous variable air valve lift apparatus - Google Patents
A kind of rocker-arm continuous variable air valve lift apparatus Download PDFInfo
- Publication number
- CN206299420U CN206299420U CN201621362396.5U CN201621362396U CN206299420U CN 206299420 U CN206299420 U CN 206299420U CN 201621362396 U CN201621362396 U CN 201621362396U CN 206299420 U CN206299420 U CN 206299420U
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- China
- Prior art keywords
- sliding block
- block assembly
- rocking arm
- rocker
- continuous variable
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Abstract
The utility model discloses a kind of rocker-arm continuous variable air valve lift apparatus, including：Rocking arm, its one end bottom side is in contact with valve and can promote valve, and other end bottom side is supported by hydraulic tappet；Cam, it is fixed on camshaft；Sliding block assembly, its top is in contact with cam, and bottom is in contact with rocking arm；Drive mechanism, it can drive the sliding block assembly to be moved relative to rocking arm, to change the position relative to rocking arm, and rocking arm can be fixed with sliding block assembly；The sliding block assembly relative to rocking arm position change, the corresponding contact position for changing cam and sliding block assembly, and sliding block assembly and rocking arm contact position, so as to change the lift of valve.Power transmission line of the present utility model is short, system stiffness is high, and each part motional inertia is small, vibration and noise are small, is easy to the continuous variable air valve lift apparatus of engine General Layout Design.
Description
Technical field
The utility model belongs to engine aspirating system technical field, more particularly to a kind of rocker-arm continuous variable valve liter
Range device.
Background technology
The valve displacement curve of conventional engine valve mechanism is changeless, and it is low to consider engine during design
Operating mode when speed and high speed, takes into account integral working of the engine in underload and high load capacity.Therefore conventional valve train
Power performance of fixed valve stroke when result in fuel economy of the engine in low speed and high speed do not reach best effective
Really.
Continuous variable valve mechanism selects rational valve stroke and valve-control according to the different operating modes of engine, makes
Valve stroke and phase are in perfect condition all the time.Continuous variable valve mechanism controlled by selecting optimal valve stroke into
Enter the gas volume in cylinder, dynamic property during fuel economy and high load capacity when taking into account engine low load.Low negative
During lotus, using less valve stroke, reduce influencing each other for intake and exhaust in gas replenishment process, make the air velocity that valve flows through compared with
Hurry up, and then improve combustion process, reach effectively control discharge；In high load capacity, using larger valve stroke, inflation effect is improved
Rate, improves the dynamic property of engine.
Existing continuous variable valve mechanism on relative market, the technical problems to be solved in the utility model is to provide for one
Rocker-arm continuous variable air valve lift apparatus are planted, its structure is improved based on conventional finger-type roller rocker arms formula valve mechanism
, its structural stability and working characteristics are good.The power transmission line of the mechanism is short, system stiffness is high, each part motional inertia
Small, vibration and noise are small, are easy to the continuous variable valve mechanism of engine General Layout Design.
Utility model content
The purpose of this utility model is to realize lift continuous changeable by the change to conventional valve mechanism, makes its structure
Simply, small is changed to valve mechanism.
The utility model provide technical scheme be：
A kind of rocker-arm continuous variable air valve lift apparatus, including：
Rocking arm, its one end is in contact with valve and valve, the other end can be promoted to be supported by hydraulic tappet；In the rocking arm
The unlimited cavity in top is set, arc chute is symmetrically arranged with the cavity two side；
Cam, it is fixed on camshaft；
Sliding block assembly, it is arranged in the cavity, and the sliding block assembly both sides are provided with two projections, it is described it is raised with
Chute coordinates, so that the sliding block assembly can be slided in the cavity；The sliding block assembly top is in contact with cam；
Torsion spring, it is arranged between the rocking arm and sliding block assembly, is that sliding block assembly applies a downward power；
Drive mechanism, it can drive the sliding block assembly to be slided in cavity, to change the sliding block relative to rocking arm
Position, so as to change the lift of valve.
Preferably, the sliding block assembly includes：
Touched with chute bottom connection support base, its bottom；
Roller, it passes through straight pin and is rotatably mounted to the support base top, and the roller is in contact with cam；Institute
State straight pin two ends and extend outwardly to form projection.
Preferably, on the camshaft, the shaft shoulder is respectively provided on two sides with before and after cam.
Preferably, the drive mechanism includes：
Bolt locking device, its two ends are rotatably supported at rocking arm, and the bolt locking device middle part is provided with screwed hole；
Bolt, it coordinates with the screwed hole, and front end and the sliding block assembly of the bolt are rotatably connected, and turns with bolt is made
Band movable slider assembly movement when dynamic；
Motor, for driving the bolt to rotate.
Preferably, the drive mechanism includes electromagnetic driver and permanent magnetism screw rod, the permanent magnetism screw rod and the sliding block
Assembly front end connects, and is moved with band movable slider assembly.
Preferably, the chute is in the circular arc with camshaft center as the center of circle.
Preferably, the camshaft is also connected with timing system, to adjust phase.
Preferably, the timing system includes：
Blade rotor, it is fixedly connected with the camshaft；
Sprocket wheel, it is arranged on the blade rotor periphery, and the blade rotor can be driven to rotate；
Phase difference can be adjusted between the sprocket wheel and blade rotor.
Preferably, the torsion spring is square frame-shaped, and the one end is fixed on sliding block assembly, the both sides of the torsion spring
It is arranged in the chute and is resisted against on the upper surface of the chute.
The beneficial effects of the utility model are：The rocker-arm continuous variable air valve lift apparatus that the utility model is provided, base
Improved in conventional finger-type roller rocker arms formula valve mechanism, relatively existing its simple structure of continuous variable valve mechanism,
Good stability and easily realize control targe.The mechanism convenient for assembly can within the engine realize that valve stroke and the continuous of phase can
Control, and the noise of drive system can be also effectively reduced while ensureing that power transmission is quick.Therefore the utility model is designed
Rocker-arm continuous variable air valve lift apparatus, there is important practical significance and application prospect.
Brief description of the drawings
Fig. 1 is rocker-arm continuous variable air valve lift apparatus general structure schematic diagram described in the utility model.
Fig. 2 is sliding block assembly structure schematic diagram described in the utility model.
Fig. 3 is driving mechanism structure schematic diagram described in the utility model.
Fig. 4 is shaft shoulder structural representation described in the utility model.
Fig. 5 is valve stroke described in the utility model with sliding block assembly variation in angular displacement curve synoptic diagram.
Fig. 6 is timing system structural representation described in the utility model.
Fig. 7 is sliding block assembly schematic view of the mounting position described in the utility model.
Its internal structure schematic diagram when Fig. 8 is half-sectional rocking arm described in the utility model.
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to explanation
Book word can be implemented according to this.
As shown in Fig. 1, Fig. 7, Fig. 8, the utility model provides a kind of rocker-arm continuous variable air valve lift apparatus, including
One rocking arm 110, its left end bottom surface is in contact with valve 120, and right-hand member is supported by hydraulic tappet 130.When rocking arm 110 be subject to one to
Under power when, left end bottom surface can promote valve 120 to open.
Cam 140 is fixed on camshaft 150, and the camshaft 150 is supported in cylinder head, when camshaft 150 rotates
When, can be rotated together with moving cam 140.
Cavity is provided with the rocking arm 110, sliding block assembly 160 is arranged in cavity.On former and later two side walls of cavity
It is arranged on two arc chutes 111.The two ends of the sliding block assembly 160 are provided with two projections, for matching somebody with somebody with arc chute 111
Close, the sliding block assembly 160 is slided along arc chute 111, the top of sliding block assembly 160 is in contact with cam 140, bottom
Portion touches with the internal cavity bottom connection of rocking arm 110, and when camshaft 150 rotates with moving cam 140, cam 140 promotes sliding block assembly
160 simultaneously move with motion rocker arm 110, realize being turned on and off for valve.Because sliding block assembly 150 can be slided in cavity,
The contact position of cam 140 and sliding block assembly 160 can exactly be changed, so that change the length of the arm of force, it is final to change rocking arm 110
Pendulum angle, the lift of valve is changed.
Fig. 2 is referred in the lump, and the sliding block assembly 160 includes support base 161, the cavity bottom in its bottom and rocking arm 110
It is in contact, and support base 161 is slided in cavity.The top of support base 161 is provided with roller 162, central shaft
Line is rotatably connected by straight pin 163 with support base 161.The two ends of the straight pin 163 stretch out to form the projection,
For coordinating with arc chute 111.The roller 162 is in contact with cam 140, makes cam 140 promote roller 162 to move, and enters
And drive support base 161 and rocking arm 110 to move, realize being turned on and off for valve 120.On the rocking arm 110 and support base 161
Torsion spring 164 is provided between end face, for making support base 161 be adjacent to the upper surface of the internal cavity of rocking arm 110.The torsion spring 164 is
Square frame row, its one end is fixed with support base 161, and the both sides of the torsion spring 164 are separately positioned in two arc chutes 111, and
And be resisted against on the upper surface of chute 111, torsion spring 164 is pressed downward by the upper surface of chute 111, so as to give support base 161
One downward power, makes its lower surface be fitted with the bottom surface of the cavity of rocking arm 110.
Drive mechanism 170 is provided between the rocking arm 110 and sliding block assembly 160, for make sliding block assembly 160 relative to
Rocking arm 110 is moved, and to change the position relative to rocking arm 110, and rocking arm 110 can be fixed with sliding block assembly 160.
As shown in figure 3, the drive mechanism 170 includes bolt locking device 171, its two ends is rotatably supported at rocking arm 110
On, its middle part is provided with screwed hole, and screw rod 172 is passed through from the screwed hole, and coordinates with screwed hole.
The right-hand member of support base 161 is provided with a jointed shaft, the front end of screw rod 172 passes through Hooke's joint and jointed shaft
Connection.Screw rod 172 drives rotation by motor 173.The motor 173 uses spline fitted with screw rod 172, exports motor 173
Rotary motion can pass to screw rod 172, while can make can be along axle between the output shaft of motor 173 and screw rod 172 again
Line is moved.
When motor 173 drives screw rod 172 to rotate, screw rod 172 makes screw rod from bolt locking device 171 with the cooperation of screwed hole
Front end is stretched out or is retracted, and drives support base 161 to be slided in cavity by Hooke's joint.Hooke's joint and support base
161 are rotatably connected, and support base 161 will not together rotate with screw rod 172, can only move.The motor 173 is watched from exchange
Motor is taken, stability and service life during its work is ensured.
When screw rod 172 does not rotate with motor 173, due to the cooperation of screw rod 172 and bolt locking device 171, make screw rod 172
Will not be relative movable with bolt locking device 171, and then can play a part of to be fixed on support base 161 in cavity.Together
When support base 161 is pressed on arc chute by torsion spring 164.
In another embodiment, the drive mechanism 170 uses electromagnetic driver, before making permanent magnetism screw rod by electromagnetic action
After move, promote support base 161 slided in arc chute.Using the both positive and negative polarity characteristic of electromagnetic driver, can be by changing electricity
The electromagnetism direction of magnetic driven device drives the moving direction of permanent magnetism screw rod, that is, change the glide direction of support base 161.
When rocker-arm continuous variable air valve lift apparatus run well, i.e., cam 140 turns counterclockwise with camshaft 150
Dynamic, the roller 162 during cam 140 promotes sliding block assembly 160 in rotation process is rotated around straight pin 163, and then is driven built-in
The rocking arm 110 for having sliding block assembly 160 is swung up and down around hydraulic tappet 130, and valve 120 is realized with swinging up and down for rocking arm 110
Open and close.Wherein straight pin 163 is concentric with roller 162, and two ends are fixed on the both sides of sliding block assembly 160.
When engine maintains a certain operating mode to be operated, i.e., valve stroke and phase keep constant.Now in the mechanism
A certain position of the sliding block assembly 160 on the arc chute in rocking arm 110 keeps constant, that is, roller 162 and cam 140
Contact position is constant, and valve 120 realizes fixed valve stroke and phase with rocking arm 110 when swinging up and down.
In structure chart as shown in Figure 1, the present position of sliding block assembly 160 is the low liter of valve mechanism initial position, i.e. valve
Journey position.When roller 162 is slided counterclockwise with sliding block assembly 160 on the internal chute of rocking arm 110, roller 162 connects with cam 140
Touch position to change, i.e., changed with the contact position of rocking arm 110 when cam 140 is rotated, promote rocking arm 110 around hydraulic tappet
130 amplitude that swings up and down changes, so as to realize the valve stroke and phase of continuous variable, to meet engine difference work
Valve stroke and timing during condition.
Sliding block assembly 160 in cavity with screw rod telescopic slide when, the Orbit revolutionary of its chute is with the axle center of camshaft 150
It is the center of circle, the circular curve with the axle center of camshaft 150 to the distance in the center of circle of roller 162 as radius, its scope by sliding as shown in Figure 1
The initial position of block assembly 160 slides about 50 degree of circular arc to it counterclockwise.Ensure that sliding block assembly 160 slides along chute direction
When, roller 162 remains tangency location with the basic circle of cam 140.
When being simultaneously larger anti-limited slip block assembly 160 sliding angle, roller 162 produces sideslip with the contact position of cam 140
Phenomenon, swinging up and down during influence 110 normal work of rocking arm.As shown in figure 4, on camshaft 150, based on cam 140 two
Two camshaft shaft shoulders 151, the both sides circular arc of its positive respective rocker arm 110 in position of camshaft shaft shoulder 151, and cam shaft are arranged in side
The external diameter of shoulder 151 is tangent with the both sides circular arc of rocking arm 110.The camshaft shaft shoulder 151 can be prevented effectively between roller 162 and cam 140
There is sideslip phenomenon.
When sliding block assembly 160 is slid onto terminal location in chute from initial position, make rocking arm 110 around hydraulic tappet 130
The amplitude that swings up and down gradually increase, realize the valve stroke and phase of continuous variable, its valve stroke is with 160 jiaos of sliding block assembly
Displacement changing curve is as shown in Figure 5.It is smaller to ensure valve stroke of the mechanism in initial position, palpus when cam 140 is designed
Using less cam lift.
With the variation in angular displacement of sliding block assembly 160, the consecutive variations of valve stroke, but its phase place change scope are capable of achieving
Increase therewith.For ensure engine valve operation phase and piston stroke synchronization, it is necessary to reduce by sliding block assembly 160 slide compared with
The phase difference produced when big.To reduce phase difference, gas can be adjusted by the valve timing system installed in the one end of camshaft 150
Door phase place change.
In Fig. 6, valve timing system is the chain-driving by being connected to crankshaft sprocket and camshaft sprocket.Blade turns
Son 182 is connected on camshaft 150, and it is concentric axle construction.Sprocket wheel 181 is mutually nested together with blade rotor 182, leads to
Cross sprocket wheel 181 and drive its synchronous axial system, that is, camshaft 150 and sprocket wheel 181 synchronous axial system.When valve-control need to be changed
When, by the left-right rotation of 182 relative sprocket wheel of fluid pressure differential blade rotor 181 between sprocket wheel 181 and blade rotor 182,
I.e. camshaft 150 with sprocket wheel 181 left-right rotation.
For example, producing larger valve-control poor when sliding block assembly 160 counterclockwise slides certain angle in chute
When.To ensure valve operation phase and piston stroke synchronization, blade rotor 182 must simultaneously be controlled by valve timing system, with
Identical rotates in an anti-clockwise direction camshaft 150 and slides corresponding angle with sliding block assembly 160.
To meet Different Work Condition of Engine demand, the rotational angle of blade rotor 182 can be controlled by valve timing system
To reach the effect of regulation valve timing.When the device is used as engine charge valve, increase is needed according to engine operating condition
During valve overlap, blade rotor 182 must be controlled with counterclockwise with the sliding of sliding block assembly 160 identical by valve timing system
Direction rotates larger angle, or slides identical less angle rotationally clockwise with sliding block assembly 160.Otherwise work as
According to engine operating condition need reduce valve overlap when, must by valve timing system control blade rotor 182 with sliding block
The sliding of assembly 160 identical rotates in an anti-clockwise direction less angle, or with square clockwise with the sliding identical of sliding block assembly 160
To the angle that rotation is larger.The size of required valve overlap is specifically controlled to perform according to engine operating condition by Engine ECU.
Although embodiment of the present utility model is disclosed as above, it is not restricted in specification and implementation method
Listed utilization, it can be applied to various suitable fields of the present utility model completely, for those skilled in the art,
Other modification is easily achieved, therefore under the universal limited without departing substantially from claim and equivalency range, this reality
Specific details is not limited to new and shown here as the legend with description.
Claims (8)
1. a kind of rocker-arm continuous variable air valve lift apparatus, it is characterised in that including：
Rocking arm, its one end is in contact with valve and valve, the other end can be promoted to be supported by hydraulic tappet；Set in the rocking arm
The unlimited cavity in top, arc chute is symmetrically arranged with the cavity two side；
Cam, it is fixed on camshaft；
Sliding block assembly, it is arranged in the cavity, and the sliding block assembly both sides are provided with two projections, the raised and chute
Coordinate, so that the sliding block assembly can be slided in the cavity；The sliding block assembly top is in contact with cam；
Torsion spring, it is arranged between the rocking arm and sliding block assembly, is that sliding block assembly applies a downward power；
Drive mechanism, it can drive the sliding block assembly to be slided in cavity, to change position of the sliding block relative to rocking arm
Put, so as to change the lift of valve.
2. rocker-arm continuous variable air valve lift apparatus according to claim 1, it is characterised in that the sliding block assembly bag
Include：
Touched with chute bottom connection support base, its bottom；
Roller, it passes through straight pin and is rotatably mounted to the support base top, and the roller is in contact with cam；The circle
Pin two ends extend outwardly to form projection.
3. rocker-arm continuous variable air valve lift apparatus according to claim 1, it is characterised in that in the camshaft
On, the shaft shoulder is respectively provided on two sides with before and after cam.
4. rocker-arm continuous variable air valve lift apparatus according to claim 2, it is characterised in that the drive mechanism bag
Include：
Bolt locking device, its two ends are rotatably supported at rocking arm, and the bolt locking device middle part is provided with screwed hole；
Bolt, it coordinates with the screwed hole, and front end and the sliding block assembly of the bolt are rotatably connected, during with rotating bolt
The assembly movement of band movable slider；
Motor, for driving the bolt to rotate.
5. rocker-arm continuous variable air valve lift apparatus according to claim 4, it is characterised in that the chute is in convex
Wheel shaft center is the circular arc in the center of circle.
6. rocker-arm continuous variable air valve lift apparatus according to claim 5, it is characterised in that the camshaft also with
Timing system is connected, to adjust phase.
7. rocker-arm continuous variable air valve lift apparatus according to claim 6, it is characterised in that the timing system bag
Include：
Blade rotor, it is fixedly connected with the camshaft；
Sprocket wheel, it is arranged on the blade rotor periphery, and the blade rotor can be driven to rotate；
Phase difference can be adjusted between the sprocket wheel and blade rotor.
8. rocker-arm continuous variable air valve lift apparatus according to claim 7, it is characterised in that the torsion spring is square frame
Shape, the one end is fixed on sliding block assembly, and the both sides of the torsion spring are arranged in the chute and are resisted against described
On the upper surface of chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621362396.5U CN206299420U (en) | 2016-12-13 | 2016-12-13 | A kind of rocker-arm continuous variable air valve lift apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621362396.5U CN206299420U (en) | 2016-12-13 | 2016-12-13 | A kind of rocker-arm continuous variable air valve lift apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206299420U true CN206299420U (en) | 2017-07-04 |
Family
ID=59213476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621362396.5U Expired - Fee Related CN206299420U (en) | 2016-12-13 | 2016-12-13 | A kind of rocker-arm continuous variable air valve lift apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206299420U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761999A (en) * | 2016-12-13 | 2017-05-31 | 辽宁工业大学 | A kind of continuous variable rocker-arm valve mechanism |
-
2016
- 2016-12-13 CN CN201621362396.5U patent/CN206299420U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761999A (en) * | 2016-12-13 | 2017-05-31 | 辽宁工业大学 | A kind of continuous variable rocker-arm valve mechanism |
| CN106761999B (en) * | 2016-12-13 | 2019-08-20 | 辽宁工业大学 | A kind of continuous variable rocker-arm valve mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20170704 Termination date: 20171213 |