CN208605238U - A kind of valve lift adjustment mechanism and engine - Google Patents
A kind of valve lift adjustment mechanism and engine Download PDFInfo
- Publication number
- CN208605238U CN208605238U CN201821297848.5U CN201821297848U CN208605238U CN 208605238 U CN208605238 U CN 208605238U CN 201821297848 U CN201821297848 U CN 201821297848U CN 208605238 U CN208605238 U CN 208605238U
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- China
- Prior art keywords
- rocker arm
- arm shaft
- driving motor
- cylinder head
- lift adjustment
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Abstract
The utility model discloses a kind of valve lift adjustment mechanism and engine, which includes: cylinder head；Driving motor component and the rocker arm shaft being mounted in the cylinder head；Wherein, the screw rod of the driving motor component passes through the mounting hole in the cylinder head, cooperates with the threaded hole on the rocker arm shaft and fixes；The Rocker arm assembly that one end and the rocker arm shaft are slidably connected；The valve connected with the other end of the Rocker arm assembly；Opposite both ends offer rectangular slot respectively in the cylinder head, and the both ends of the rocker arm shaft are plugged in the rectangular slot, and the driving motor component is moved horizontally in the rectangular slot by rocker arm shaft described in the screw drive.The embodiments of the present invention, driving motor controls the electrodeless movement of rocker arm shaft by screw rod, valve stroke can realize and continuously adjust that moving horizontally for rocker arm shaft makes rocker arm and rocker arm shaft contact position change the variation for leading to Rocker Ratio, to play the purpose for adjusting valve stroke.
Description
Technical field
The utility model relates to automotive engine applications more particularly to a kind of valve lift adjustment mechanism and engines.
Background technique
The valve stroke of traditional petrol engine cannot be adjusted according to the operating condition of engine, this is resulted in
Designed valve stroke can not make engine all obtain good response in high velocity and low regime.In order to balance high velocity and
The engine performance of low regime, current lift range variable technology, which mainly has, arranges two groups of cams on a camshaft, leads to
It crosses hydraulic mechanism or the modes such as rocker arm phase is changed by motor and realize.
By arranging that the structure type of two groups of cams is only able to achieve cutting for two kinds of valve strokes of height on a camshaft
It changes, cannot achieve and continuously adjust；Realize although valve liter may be implemented in the adjustable mode of valve stroke by hydraulic mechanism mechanism
Journey is continuously adjustable, but structure is complicated, and there are the risks such as hydraulic system leakage；It is by watching in such a way that motor changes rocker arm phase
The swing angle that motor adjusts lift rocker arm by worm drive gear is taken, rocker arm, lift control are controlled by camshaft actuated lift
Rocker arm processed drives valve rocker, finally drives valve reciprocation by valve rocker, and this structure is also more complicated, kinematic pair compared with
It is more, processing difficulties.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of valve lift adjustment mechanism and engine, solution
The problem of valve stroke of engine of having determined cannot be adjusted according to the operating condition of engine.
According to the one aspect of the utility model, a kind of valve lift adjustment mechanism is provided, comprising: cylinder head；
Driving motor component and the rocker arm shaft being mounted in the cylinder head；Wherein, the spiral shell of the driving motor component
Bar passes through the mounting hole in the cylinder head, cooperates with the threaded hole on the rocker arm shaft and fixes；
The Rocker arm assembly that one end and the rocker arm shaft are slidably connected；
The valve connected with the other end of the Rocker arm assembly；
Opposite both ends offer rectangular slot respectively in the cylinder head, and the both ends of the rocker arm shaft are plugged in the square
In shape fluting, the driving motor component is moved horizontally in the rectangular slot by rocker arm shaft described in the screw drive.
Optionally, the driving motor component further includes driving motor, and the screw rod is fixed on the driving motor.
Optionally, the rocker arm shaft includes: the sliding axle that both ends are plugged in the rectangular slot, and is fixed on described
Support portion on sliding axle；
The threaded hole is provided with the middle position of the sliding axle；
The support portion is fixed on the two sides of the threaded hole.
Optionally, section of the support portion on the direction vertical with the sliding axle is circle；
The top sliding contact of one end of the Rocker arm assembly and the support portion.
Optionally, the Rocker arm assembly includes: rocker arm and the idler wheel that is arranged on the rocker arm；
One end of the rocker arm is slidably connected with the rocker arm shaft；It is connect at the top of the other end of the rocker arm and the valve
Touching.
Optionally, the valve lift adjustment mechanism further include: camshaft；
The camshaft includes the diameter of axle and the cam that is arranged on the diameter of axle, and the cam connects with the roller-coaster
Touching.
Optionally, the camshaft is fixed in the cylinder head.
According to the other side of the utility model, a kind of engine is provided, adjusts machine including above-mentioned valve stroke
Structure.
The beneficial effect of the embodiments of the present invention is:
In above scheme, moving horizontally for rocker arm shaft is controlled by screw mechanism by driving motor, makes Rocker arm assembly and shakes
The variation of the contact position of arm axle leads to the variation of Rocker Ratio, so that the purpose for adjusting valve stroke is played, driving motor control
The electrodeless movement of rocker arm shaft, valve stroke may be implemented to continuously adjust.
Detailed description of the invention
Fig. 1 shows the structure charts of the valve lift adjustment mechanism of the utility model embodiment；
Fig. 2 indicates the structural schematic diagram of the rocker arm shaft of the utility model embodiment；
Fig. 3 indicates the structural schematic diagram of the Rocker arm assembly of the utility model embodiment；
Fig. 4 indicates the schematic diagram of the adjusting valve stroke of the utility model embodiment.
Wherein in figure: 1, cylinder head, 2, driving motor component, 3, rocker arm shaft, 4, Rocker arm assembly, 5, valve, 6, camshaft；
11, mounting hole, 12, rectangular slot, 21, screw rod, 22, driving motor, 31, threaded hole, 32, sliding axle, 33, support
Portion, 41, rocker arm, 42, idler wheel, 61, the diameter of axle, 62, cam.
Specific embodiment
The exemplary embodiment of the utility model is more fully described below with reference to accompanying drawings.Although showing this in attached drawing
The exemplary embodiment of utility model, it being understood, however, that may be realized in various forms the utility model without should be by here
The embodiment of elaboration is limited.It is to be able to thoroughly understand the utility model, and energy on the contrary, providing these embodiments
It is enough to be fully disclosed to those skilled in the art the scope of the utility model.
As shown in Figure 1-3, the embodiments of the present invention provide a kind of valve lift adjustment mechanism, comprising: cylinder head
1；The driving motor component 2 and rocker arm shaft 3 being mounted in the cylinder head 1；Wherein, the screw rod of the driving motor component 2
21 pass through the mounting hole 11 in the cylinder head 1, cooperate with the threaded hole 31 on the rocker arm shaft 3 and fix；It is shaken with described one end
The Rocker arm assembly 4 that arm axle 3 is slidably connected；The valve 5 connected with the other end of the Rocker arm assembly 4；
Opposite both ends offer rectangular slot 12 respectively in the cylinder head 1, and the both ends of the rocker arm shaft 3 are plugged in institute
It states in rectangular slot 12, the driving motor component 2 drives the rocker arm shaft 3 in the rectangular slot 12 by the screw rod 21
Inside move horizontally.
In the embodiment, the driving motor component 2 is mounted in the cylinder head 1, and the driving motor component 2 also wraps
Driving motor 22 is included, the screw rod 21 is fixed on the driving motor 22, and the screw rod 21 passes through the mounting hole in cylinder head 1
11, and screw thread pair is formed with the threaded hole 31 on the rocker arm shaft 3.The rocker arm shaft 3 can be opened in the rectangle in the cylinder head 1
Horizontal sliding in slot 12.One end of the Rocker arm assembly 4 is contacted with rocker arm shaft 3, and the other end is contacted with the top of valve 5, works as hair
When motivation needs to adjust valve stroke, the driving motor 22 passes through the screw rod 21 being fixed thereon and rocker arm shaft 3 is pushed to exist
It is moved horizontally in the rectangular slot 12, so that Rocker arm assembly 4 and the contact position of rocker arm shaft 3 is changed, to change rocker arm
Than achieving the purpose that change valve stroke.Wherein, valve stroke is the lift of engine cam and the product of Rocker Ratio, is shaken
Arm is than increasing, then valve stroke increases.
It is worth noting that the fluting that the cylinder head 1 is moved horizontally for the rocker arm shaft 3 can be the rectangular slot
12, or the bottom of other shapes is the fluting of horizontal structure, should ensure that moving horizontally for rocker arm shaft 3.
The program controls rocker arm shaft by screw mechanism by driving motor and moving horizontally, and makes Rocker arm assembly and rocker arm shaft
The variation of contact position leads to the variation of Rocker Ratio, to play the purpose for adjusting valve stroke, driving motor controls rocker arm shaft
Electrodeless movement, valve stroke may be implemented to continuously adjust.
In the above embodiments of the present invention, the rocker arm shaft 3 includes: that both ends are plugged in the rectangular slot 12
Sliding axle 32, and the support portion 33 being fixed on the sliding axle 32；
The threaded hole 31 is provided with the middle position of the sliding axle 32；The support portion 33 is fixed on the threaded hole
31 two sides.
In the embodiment, the shape of the sliding axle 32 without limitation, but should ensure that sliding axle 32 can be in the square
Horizontal sliding in shape fluting 12.On the sliding axle 32, it is provided with support portion 33, the support portion 33 can be at two, to divide
The two sides of the threaded hole 31 are not set.Preferably, the support portion 33 is on the direction vertical with the sliding axle 32
Section be circle, the top sliding contact of one end of the Rocker arm assembly 4 and the support portion 33, i.e., the described support portion 33 for
The cylindrical body of 32 coaxial line of sliding axle, and the end thereof contacts on the top of curved surfaces and the Rocker arm assembly 4, in driving electricity
Machine 22 by the screw rod 21 push rocker arm shaft 3 moved horizontally in the rectangular slot 12 when, the Rocker arm assembly 4 with it is described
The position of the contact point of support portion 33 changes, and so as to cause the variation of Rocker Ratio, plays the purpose for adjusting valve stroke.
In the above embodiments of the present invention, the Rocker arm assembly 4 includes: Rocker arm 41 and is arranged on the Rocker arm 41
Idler wheel 42；One end of the Rocker arm 41 is slidably connected with the rocker arm shaft 3；The other end of the Rocker arm 41 and the valve 5
Top contact.
Specifically, the valve lift adjustment mechanism further include: camshaft 6；The camshaft 6 includes the diameter of axle 61 and setting
Cam 62 on the diameter of axle 61, the cam 62 and 42 sliding contact of idler wheel.The camshaft 6 is fixed on the gas
On cylinder cap 1.
In the embodiment, one end of the Rocker arm 41 is contacted with the support portion 33 of the rocker arm shaft 3, the other end and valve 5
Top contact, middle section contacts with the camshaft 6, to reduce the frictional force when driving rocker arm of camshaft 6, on Rocker arm 41
Idler wheel 42 is devised, idler wheel 42 can be freely rotated around the central axis being fixed on rocker arm, and camshaft 6 is directly contacted with idler wheel 42.
The main body of the camshaft 6 is a cylindrical barred body approximately uniform with air cylinder group length, i.e., the described diameter of axle 61, in the axis
Multiple cams 62 are arranged on diameter 61, the cam 62 is directly contacted with the idler wheel 42, it is preferable that the cam 62
Quantity should be consistent with the quantity of the idler wheel 42, corresponds convenient for cam 62 and idler wheel 42, and the side of the cam 62 is in chicken
Egg shape can guarantee the sufficient air inlet of cylinder and exhaust.The camshaft 6 is fixed in the cylinder head 1, and camshaft 6 is being sent out
It is constantly rotated under the drive of the crankshaft of motivation, cam 62 just constantly pushes the idler wheel 42 on the Rocker arm 41, so that rocker arm
41 push the valve 5, realize the function of control valve opening and closing.
As shown in figure 4, to adjust the schematic diagram of valve stroke in the embodiment, rocker arm shaft 3 is in separate when initial position
The position of camshaft 6, the fulcrum of Rocker arm 41 and rocker arm shaft 3 is located at A point shown in Fig. 4 at this time, then Rocker Ratio are as follows: AD/AC,
In, C point is the contact point of the idler wheel 42 on cam 62 and rocker arm, and D point is the contact point of valve 5 and Rocker arm 41, it is assumed that camshaft 6
Lift be L, then valve stroke be L × AD/AC；When engine needs big valve stroke, driving motor 22 passes through fixation
The direction that screw rod 21 on it pushes rocker arm shaft 3 to close camshaft 6 is mobile, at this time the branch point of Rocker arm 41 and rocker arm shaft 3
B point in Fig. 4, Rocker Ratio BD/BC, due to BD/BC > AD/AC, i.e. Rocker Ratio becomes larger, and valve stroke becomes larger simultaneously.When
When engine needs lesser valve stroke, motor antiport, rocker arm shaft 3 is mobile to the direction far from camshaft 6, Rocker Ratio
Reduce, valve stroke reduces.
The embodiments of the present invention additionally provide a kind of engine, including above-mentioned valve lift adjustment mechanism.
The embodiment of the utility model, driving motor control the electrodeless movement of rocker arm shaft, valve stroke by screw mechanism
It can be achieved to continuously adjust, moving horizontally for rocker arm shaft makes rocker arm and rocker arm shaft contact position change the variation for leading to Rocker Ratio, from
And play the purpose for adjusting valve stroke.
Above-described is preferred embodiments of the present invention, it should be pointed out that for the ordinary person of the art
For, it can also make several improvements and retouch under the premise of not departing from principle described in the utility model, these are improved and profit
It adorns also within the protection scope of the present utility model.
Claims (8)
1. a kind of valve lift adjustment mechanism characterized by comprising cylinder head (1)；
The driving motor component (2) and rocker arm shaft (3) being mounted on the cylinder head (1)；Wherein, the driving motor component
(2) screw rod (21) passes through the mounting hole (11) on the cylinder head (1), matches with the threaded hole (31) on the rocker arm shaft (3)
It closes and fixes；
The Rocker arm assembly (4) that one end and the rocker arm shaft (3) are slidably connected；
The valve (5) connected with the other end of the Rocker arm assembly (4)；
Opposite both ends offer rectangular slot (12) respectively on the cylinder head (1), and the both ends of the rocker arm shaft (3) are plugged in
In the rectangular slot (12), the driving motor component (2) drives the rocker arm shaft (3) described by the screw rod (21)
It is moved horizontally in rectangular slot (12).
2. valve lift adjustment mechanism according to claim 1, which is characterized in that the driving motor component (2) is also wrapped
It includes driving motor (22), the screw rod (21) is fixed on the driving motor (22).
3. valve lift adjustment mechanism according to claim 1, which is characterized in that the rocker arm shaft (3) includes: that both ends are inserted
The sliding axle (32) being located in the rectangular slot (12), and the support portion (33) being fixed on the sliding axle (32)；
The threaded hole (31) is provided with the middle position of the sliding axle (32)；
The support portion (33) is fixed on the two sides of the threaded hole (31).
4. valve lift adjustment mechanism according to claim 3, which is characterized in that the support portion (33) with the cunning
Section on the vertical direction of moving axis (32) is circle；
The top sliding contact of one end and the support portion (33) of the Rocker arm assembly (4).
5. valve lift adjustment mechanism according to claim 1, which is characterized in that the Rocker arm assembly (4) includes: rocker arm
(41) and idler wheel (42) on the rocker arm (41) is set；
One end of the rocker arm (41) is slidably connected with the rocker arm shaft (3)；The other end and the valve of the rocker arm (41)
(5) top contact.
6. valve lift adjustment mechanism according to claim 5, which is characterized in that the valve lift adjustment mechanism is also wrapped
It includes: camshaft (6)；
The camshaft (6) includes the diameter of axle (61) and is arranged cam (62) on the diameter of axle (61), the cam (62) with
Idler wheel (42) sliding contact.
7. valve lift adjustment mechanism according to claim 6, which is characterized in that the camshaft (6) is fixed on described
In cylinder head (1).
8. a kind of engine, which is characterized in that including the described in any item valve lift adjustment mechanisms of claim 1~7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821297848.5U CN208605238U (en) | 2018-08-13 | 2018-08-13 | A kind of valve lift adjustment mechanism and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821297848.5U CN208605238U (en) | 2018-08-13 | 2018-08-13 | A kind of valve lift adjustment mechanism and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208605238U true CN208605238U (en) | 2019-03-15 |
Family
ID=65680864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821297848.5U Active CN208605238U (en) | 2018-08-13 | 2018-08-13 | A kind of valve lift adjustment mechanism and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208605238U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685768A (en) * | 2019-10-18 | 2020-01-14 | 姬腾飞 | Variable valve driving device of engine and engine |
| CN116163818A (en) * | 2023-04-24 | 2023-05-26 | 泰州市姜堰伟达机械有限公司 | Rocker arm device of rocker arm of internal combustion engine |
-
2018
- 2018-08-13 CN CN201821297848.5U patent/CN208605238U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110685768A (en) * | 2019-10-18 | 2020-01-14 | 姬腾飞 | Variable valve driving device of engine and engine |
| CN116163818A (en) * | 2023-04-24 | 2023-05-26 | 泰州市姜堰伟达机械有限公司 | Rocker arm device of rocker arm of internal combustion engine |
| CN116163818B (en) * | 2023-04-24 | 2023-06-27 | 泰州市姜堰伟达机械有限公司 | Rocker arm device of internal combustion engine |
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