CN205876416U - Activity fulcrum variable valve rocking arm system - Google Patents
Activity fulcrum variable valve rocking arm system Download PDFInfo
- Publication number
- CN205876416U CN205876416U CN201620845501.4U CN201620845501U CN205876416U CN 205876416 U CN205876416 U CN 205876416U CN 201620845501 U CN201620845501 U CN 201620845501U CN 205876416 U CN205876416 U CN 205876416U
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- China
- Prior art keywords
- valve
- transmission shaft
- rocking arm
- fulcrum
- worm
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Abstract
The utility model discloses an activity fulcrum variable valve rocking arm system, including valve, valve spring, rocking arm, valve ejector pin, cam and air valve movement controlling means, the one end at the rocking arm is fixed through a fixation nut to the valve ejector pin, and the cam rotates drive valve ejector pin and reciprocates, the other end and the spiracular top contact of rocking arm, the fulcrum and the air valve movement controlling means of rocking arm are connected, air valve movement controlling means includes driver part, transmission shaft and worm gear transmission structure, and the transmission shaft passes through bearing position, the top end screw thread connection screw rod of transmission shaft, the top and the rocker fulcrum rigid connection of screw rod, the worm wheel sets up on the transmission shaft, and the worm is driven by the driver part. The difference that the transmission shaft turned to can realize the lift of screw rod. The utility model discloses an activity fulcrum variable valve rocking arm system need not make great change to the engine structure, and whole is changed for a short time, simple structure, and control is nimble, and the response is rapid, and the energy consumption is hanged down, is favorable to the application and the popularization of variable valve technique on the engine.
Description
Technical field
This utility model belongs to engine valve device field, is specifically related to a kind of moving fulcrum changeable air valve rocking arm system
System.
Background technology
Internal combustion engine is that the thermal efficiency is the highest, unit volume and the maximum prime mover of power-weight ratio, and application is widely.With
The day by day exhausted of world's fossil energy and the deterioration of environmental resource, internal combustion engine needs to meet stricter Abgasgesetz and oil
Consumption requirement.
Traditional combustion engine uses the actuated by cams valve of fixing molded line, and this is it cannot be guaranteed that the discharge of internal combustion engine and oil consumption are in institute
Having operating point all to reach optimal, the most most of internal combustion engines all use changeable air valve technology to optimize discharge, to reduce oil consumption.
In changeable air valve technology, it is excellent that mechanical variable gas distribution technology based on cam has simple in construction, rapid, the good reliability of response etc.
Point, is an emphasis direction of research and development.
Utility model content
The purpose of this utility model is to provide a kind of moving fulcrum changeable air valve rocker arm system, comprises valve motion control
Device, by the position of this device adjustable rocker arm pivot, thus changes the characteristics of motion of valve.
In order to solve above-mentioned technical problem, the utility model proposes a kind of moving fulcrum changeable air valve rocker arm system, including
Valve, valve spring, rocking arm, valve stem, cam and valve motion control device；Described valve stem fixes nut by one
Being fixed on one end of described rocking arm, described cam rotation drives valve stem to move up and down；The other end of described rocking arm is with described
The top contact of valve；The fulcrum of described rocking arm controls device with described valve motion and is connected；Described valve motion controls device
Including driver part, power transmission shaft and drive structure of gear worm, described power transmission shaft is positioned by bearing, the top of described power transmission shaft
Being provided with screwed hole, be equipped with a screw rod in described screwed hole, the top of described screw rod is rigidly connected with rocking bar fulcrum；Described worm gear
The worm gear of worm transmission structure is arranged on described power transmission shaft, and the worm screw of described drive structure of gear worm is by described driver part
Drive.
This utility model moving fulcrum changeable air valve rocker arm system, wherein, the connection of described worm gear and described power transmission shaft is adopted
Connect with flat key.The described worm gear axially location on described power transmission shaft uses the shaft shoulder and axle sleeve.
Compared with prior art, the beneficial effects of the utility model are:
Moving fulcrum changeable air valve rocker arm system of the present utility model need not make engine structure great change, overall
Change little, simple in construction, control flexibly, rapidly, energy consumption is low in response, beneficially the application on the engine of changeable air valve technology and
Promote.
Accompanying drawing explanation
Fig. 1 is the structural representation of moving fulcrum changeable air valve rocker arm system；
Fig. 2 is the right view of worm screw in Fig. 1；Wherein M represents electronically controlled motor；
Fig. 3 is the Changing Pattern figure that valve stroke is gradually reduced seasonal epidemic pathogens gate line.
Wherein:
1-bearing 2-power transmission shaft 3-valve 4-valve spring 5-rocking arm
6-fixes nut 7-valve stem 8-cam 9-screw rod 10-worm screw
11-worm gear 12-flat key 13-sleeve
Detailed description of the invention
With specific embodiment, technical solutions of the utility model are described in further detail below in conjunction with the accompanying drawings, described
This utility model is only explained by specific embodiment, not in order to limit this utility model.
As it is shown in figure 1, a kind of moving fulcrum changeable air valve rocker arm system that the utility model proposes, including valve 3, valve
Spring 4, Rocker arm 5, valve stem 7, cam 8 and valve motion control device.
Described valve stem 7 is fixed nut 6 by one and is fixed on one end of described Rocker arm 5, the other end of described Rocker arm 5 with
The top contact of described valve 3, described valve stem 7 is driven by cam 8, and cam 8 can use traditional camshaft actuated, described
The rotation of cam 8 drives valve stem 7 to move up and down, and valve 3 and valve stem 7 realize transmission by Rocker arm 5 between the two,
The fulcrum of described Rocker arm 5 controls device with described valve motion and is connected, and it is real that the fulcrum of Rocker arm 5 can control device by valve motion
Now move up and down；
Described valve motion controls device and includes driver part, power transmission shaft 2 and drive structure of gear worm.Described power transmission shaft
2 are positioned by bearing 1, and the top of described power transmission shaft 2 is provided with screwed hole, is equipped with a screw rod 9, utilizes screw thread in described screwed hole
The self-locking of transmission realizes the location, axle center of screw rod 9, and the top of described screw rod 9 is rigidly connected with rocking bar fulcrum.
The worm gear 11 of described drive structure of gear worm is arranged on described power transmission shaft 2, described worm gear 11 and described transmission
The flat key 12 that is connected by of axle 2 connects；In described rotary shaft 2, it is positioned at one end of described worm gear 11 and is provided with the shaft shoulder (i.e. one circle footpath
To boss), the other end of described worm gear 11 is set with axle sleeve 3, and on described power transmission shaft 2, the axial location of worm gear 11 is by the shaft shoulder (i.e.
One circle radially boss) limit with axle sleeve 13, described worm screw 10 is driven by described driver part, and driver part can use automatically controlled setting
Standby such as electronically controlled motor, as in figure 2 it is shown, described worm screw 10 drives described worm gear 11 to rotate, described worm gear 11 drives power transmission shaft 2 turns
Dynamic, when described power transmission shaft 2 rotates, the difference that power transmission shaft 2 turns to can realize the lifting of screw rod 9 by screw-driven.
In moving fulcrum changeable air valve rocker arm system of the present utility model, cam 8 provides the power that valve 3 is opened, valve
Spring 4 provides the restoring force that valve 3 is closed, and the position of Rocker arm 5 fulcrum controls device by valve motion and realizes adjusting up and down.Adjust
Time whole, worm screw 10 rotates and drives worm gear 11 to rotate, and worm gear 11 connects drive power transmission shaft 2 by flat key 12 and rotates, and worm gear 11 is just
To or rotate backward, drive power transmission shaft 2 rotate forward or backwards, realize rising or falling of screw rod 9 through screw-driven, thus change
Become the upper-lower position of Rocker arm 5 fulcrum, finally realize the change of valve stroke and the characteristics of motion.Due to worm-and-wheel gear gear ratio
Less, when worm gear 11 slowly rotates, it is possible to achieve the small change of Rocker arm 5 position of the fulcrum.Device is controlled by valve motion
Adjusting the position of Rocker arm 5 fulcrum, when Rocker arm 5 fulcrum is in minimum point, cam 8 drives valve 3 motion can realize air
Door lift；And when Rocker arm 5 fulcrum is at the highest notch, cam 8 drives valve 3 motion can realize zero valve stroke.
As a example by reducing valve stroke when valve stroke maximum below, moving fulcrum changeable air valve of the present utility model is described
The work process of rocker arm system:
Cam 8 drives valve stem 7, transmits power by Rocker arm 5, promotes valve 3 to open.When needs reduce valve stroke
Time, to electronically controlled motor M (as shown in Figure 2) signal, order about worm screw 10 and rotate, make 11 turns of worm gear by Worm and Worm Gear Driving structure
Dynamic, then impart power to power transmission shaft 2, power transmission shaft 2 concomitant rotation by flat key 12, then pass through the interior spiral shell on power transmission shaft 2 top
Stricture of vagina makes screw rod 9 upwards jack-up with the transmission of screw rod 9 lower external thread, so that the position of the fulcrum of Rocker arm 5 rises.When Rocker arm 5 props up
When rising on some position, cam 8 is started working and cornerite angle during power cut-off reduces, and cam profile active section changes, and then
Change the characteristics of motion of valve 3.When valve stroke is gradually reduced, the Changing Pattern of valve molded line as shown in Figure 3, its
In, Article 1 solid line is that Rocker arm 5 fulcrum is in minimum point seasonal epidemic pathogens gate line from top to bottom, below two dotted lines be Rocker arm 5 fulcrum
Position is gradually increasing the change signal of seasonal epidemic pathogens gate line.In this utility model, change turning to of power transmission shaft 2 and can realize screw rod 9
Decline.
Although being described this utility model above in conjunction with accompanying drawing, but this utility model is not limited to above-mentioned
Detailed description of the invention, above-mentioned detailed description of the invention is only schematic rather than restrictive, the ordinary skill of this area
Personnel are under enlightenment of the present utility model, in the case of without departing from this utility model objective, it is also possible to make many variations, this
Within belonging to protection of the present utility model.
Claims (3)
1. a moving fulcrum changeable air valve rocker arm system, including valve (3), valve spring (4), rocking arm (5), valve stem
(7), cam (8) and valve motion control device；It is characterized in that:
Described valve stem (7) is fixed nut (6) by one and is fixed on one end of described rocking arm (5), and described cam (8) rotates and drives
Dynamic valve stem (7) moves up and down；The other end of described rocking arm (5) and the top contact of described valve (3)；Described rocking arm (5)
Fulcrum and described valve motion control device and be connected；
Described valve motion controls device and includes driver part, power transmission shaft (2) and drive structure of gear worm, described power transmission shaft
(2) being positioned by bearing (1), the top of described power transmission shaft (2) is provided with screwed hole, is equipped with a screw rod (9) in described screwed hole,
The top of described screw rod (9) is rigidly connected with rocking bar fulcrum；The worm gear (11) of described drive structure of gear worm is arranged on described
On power transmission shaft (2), the worm screw (10) of described drive structure of gear worm is driven by described driver part.
Moving fulcrum changeable air valve rocker arm system the most according to claim 1, it is characterised in that: described worm gear (11) is with described
The flat key (12) that is connected by of power transmission shaft (2) connects.
Moving fulcrum changeable air valve rocker arm system the most according to claim 1, it is characterised in that: described worm gear (11) is described
Axially location on power transmission shaft (2) uses the shaft shoulder and axle sleeve (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620845501.4U CN205876416U (en) | 2016-08-04 | 2016-08-04 | Activity fulcrum variable valve rocking arm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620845501.4U CN205876416U (en) | 2016-08-04 | 2016-08-04 | Activity fulcrum variable valve rocking arm system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205876416U true CN205876416U (en) | 2017-01-11 |
Family
ID=57701296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620845501.4U Active CN205876416U (en) | 2016-08-04 | 2016-08-04 | Activity fulcrum variable valve rocking arm system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205876416U (en) |
-
2016
- 2016-08-04 CN CN201620845501.4U patent/CN205876416U/en active Active
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| GR01 | Patent grant |