CN209398473U - A kind of engine rod-pulling type variable valve gear - Google Patents
A kind of engine rod-pulling type variable valve gear Download PDFInfo
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- CN209398473U CN209398473U CN201821778205.2U CN201821778205U CN209398473U CN 209398473 U CN209398473 U CN 209398473U CN 201821778205 U CN201821778205 U CN 201821778205U CN 209398473 U CN209398473 U CN 209398473U
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- circular hole
- rocker arm
- shaft
- push rod
- gear
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Abstract
The utility model discloses a kind of engine rod-pulling type variable valve gear, mainly includes cam, motor, control shaft, gear drive, rocker arm.Rod-pulling type variable valve gear is fixed on cylinder cover, when engine speed variation, eccentric hoop block a25 is driven by motor 9, eccentric hoop block b26 movement drives propulsion and the return of pull rod 30, change angle between push rod a22 and push rod b33, in conjunction with the movement of cam 19, solve the problems, such as that engine valve stroke under different operating conditions cannot regulate and control, realize the continuous lift for changing valve, keep intake and exhaust abundant, improve mixing, be conducive to improve engine in the torque of speed operation and the efficiency of high-speed working condition, be conducive to improve the fuel economy of engine, dynamic property and emission performance.
Description
Technical field
The utility model relates to a kind of automotive engine component or equipment, in particular to a kind of engine rod-pulling type can be changed gas
Door gear.
Background technique
The valve actuating mechanism of engine is the pith of engine, main function be according to the working cycles of each cylinder come
The close moment of the start-up time of control valve and duration and valve, so that realizing has fresh sky in cylinder scavenging period
The discharge into cylinder and exhaust gas of gas provides reliable power resources for the circulation of engine.
The lift of the valve of traditional engine valve actuating mechanism is fixed immutable, that is to say, that the cam of camshaft
As soon as molded line only has, this determines that engine in the case can not have good sound in high velocity and low regime
It answers, engine does not obtain high speed efficiency, can not obtain the torque of low speed.
In consideration of it, by improving, the engine having at present has lift range variable technology, i.e. double cam or how convex
The variable technique to realize valve stroke is taken turns, by the way that at low engine speed area, low lift cams act on valve, at this time valve
Lift is smaller, and at high velocity, high-lift cam acts on valve, and valve stroke and opening time all increase accordingly at this time, but
It is due to being the control of segmented, so torsion output is nonlinear, and structure is complicated, and engine noise increases.
It is therefore desirable to which a kind of continuously variable valve lift structure, defeated to solve engine torsion in each change working
Nonlinear problem and the big problem of noise out.
Utility model content
Technical problem to be solved in the utility model is that the valve stroke of existing engine can not be realized with work
The problem of condition consecutive variations, provides a kind of engine rod-pulling type valve gear of achievable continuously variable valve lift.
To solve the problems, such as appeal, the utility model is realized using following method:
Engine rod-pulling type variable valve gear is by valve 1, cylinder cap 2, motor mounting rack 3, control bracing strut 4, camshaft
Bracket 5, limited ring dais a6, control shaft 7, motor shaft 8, motor 9, upper cover plate a10, limited ring dais b11, rocker arm shaft 12, stop collar
Platform c13, upper cover plate b14, limited ring dais d15, rocker arm a16, snap ring a17, pin shaft a18, cam 19, camshaft 20, snap ring b21,
Push rod a22, rocker arm b23, gear a24, eccentric hoop block a25, eccentric hoop block b26, gear b27, snap ring c28, collar stop 29,
Pull rod 30, gear c31, gear d32, push rod b33, pin shaft b34, snap ring d35, snap ring e36, valve spring 37, push rod reset bullet
Spring a38, pin shaft c39, push rod reset spring b40, snap ring f41, snap ring g42 composition.
Motor mounting rack 3, control bracing strut 4 and camshaft stand 5 are fixed on cylinder cap 2 by bolt, limited ring dais a6
It is fixed in 7 outer surface of control shaft with limited ring dais b11, upper cover plate a10 and control bracing strut 4 are placed in limited ring dais a6 and stop collar
Between platform b11, and it is connected by bolt；Control shaft 7 is placed between upper cover plate a10 and control bracing strut 4, clearance fit；Motor 9
It is fixed on motor mounting rack 3,8 one end of motor shaft is connected with motor 9, and one end is connected with control shaft 7；Camshaft stand 5 and upper
Cover board b14 is placed between limited ring dais c13 and limited ring dais d15, is connected by bolt, and is connected with the sliding of rocker arm shaft 12；Limit
Position land c13 and limited ring dais d15 is fixed in 12 outer surface of rocker arm shaft；Rocker arm a16 and rocker arm b23 are set in rocker arm shaft 12
Outer surface, and be slidably connected；Cam 19 is fixed in 20 outer surface of camshaft, and is connected with rocker arm a16 sliding；Rocker arm b23 is outstanding to be put
On 1 top of valve, and therewith, sliding is connected.
Pin shaft a18 is each passed through the circular hole d2201 that the circular hole b1602 that rocker arm a16 is opened up and push rod a22 are opened up, and slides
Connection；Snap ring a17 and snap ring b21 is placed in annular groove b1801, the annular groove c1802 that the both ends pin shaft a18 open up；Pin shaft b34 points
Not Chuan Guo rocker arm b23 circular hole g2302 and push rod b33 circular hole r3301, and be slidably connected；Snap ring d35 and snap ring e36 are split
In in annular groove e3402, the annular groove d3401 that the both ends pin shaft b34 open up；Pin shaft c39 is each passed through the circular hole that pull rod 30 opens up
The circular hole o3302 that the circular hole e2202 and push rod b33 that p3003, push rod a22 are opened up are opened up, and be slidably connected；Snap ring f41 and card
Ring g42 is placed in annular groove g3902, the annular groove f3901 that the both ends pin shaft c39 open up.
Gear a24, eccentric hoop block a25, eccentric hoop block b26 and gear b27 are sleeved on rocker arm shaft 12, and gap therewith
Cooperation；Gear a24 and eccentric hoop block a25 are fixed together, and eccentric hoop block b26 and gear b27 are fixed together；Pull rod 30 1
End is connected with pin shaft c39, and one end passes through the circular hole c1201 that rocker arm shaft 12 opens up and collar stop 29 is affixed；Eccentric hoop block a25 and
Eccentric hoop block b26 is placed in 30 two sides of pull rod, and phase is slided in collar stop 29 and eccentric hoop block a25 and the eccentric hoop outer surface block b26
Even；Gear d32 and gear c31 are fixed in control shaft 7, and are engaged respectively with gear a24 and gear b27；Push rod reset spring
A38 is connected with rocker arm a16 and push rod a22, and has certain pulling force pretightning force；It push rod reset spring b40 and rocker arm b23 and pushes away
Bar b33 is connected, and has certain pulling force pretightning force.
Rocker arm a16 is equipped with circular hole a1601 and circular hole b1602, the rocker arm b23 are equipped with circular hole f2301 and circular hole g2302,
Push rod a22 is equipped with circular hole d2201 and circular hole e2202, and push rod b33 is equipped with circular hole r3301, circular hole o3302；Circular hole a1601 and circle
Hole f2301 is connected with the sliding of rocker arm shaft 12, and circular hole b1602 and circular hole d2201 are connected with pin shaft a18 sliding, circular hole e2202 and circle
Hole o3302 is connected with pin shaft c39 sliding, and circular hole r3301 and circular hole g2302 are connected with pin shaft b34 sliding.
30 one end of pull rod is equipped with cylindrical bar 3001, and one end is equipped with square block 3002, and is additionally provided with circular hole in square block 3002
P3003, circular hole p3003 and pin shaft c39 sliding are connected.
Eccentric hoop block a25 is equipped with circular hole i2501, and eccentric hoop block b26 is equipped with circular hole k2601, and gear a24 is equipped with circular hole
H2401, gear b27 are equipped with circular hole m2701, circular hole i2501, circular hole k2601, circular hole h2401 and the aperture circular hole m2701
It is identical, and with 12 clearance fit of rocker arm shaft.
Rocker arm shaft 12 is equipped with circular hole c1201, annular groove a1202, the axial line of circular hole c1201 and the axial line of rocker arm shaft 12
Intersect and vertical.
The both ends pin shaft a18 are equipped with identical annular groove b1801, annular groove c1802, and respectively snap ring a17, snap ring b21 provide installation
Position；The both ends pin shaft b34 are equipped with identical annular groove d3401, annular groove e3402, and respectively snap ring e36, snap ring d35 provide installation position
It sets；The both ends pin shaft c39 are equipped with identical annular groove f3901, annular groove g3902, and respectively snap ring g42, snap ring f41 provide installation site.
Circular hole a1601 and circular hole b1602 axial line spacing are identical as circular hole f2301 and circular hole g2302 axial line spacing；Circle
Hole d2201 and circular hole e2202 axial line spacing are identical as circular hole r3301 and circular hole o3302 axial line spacing.
Rocker arm a16 is identical with the size of rocker arm b23, and structure is identical；Push rod a22 is identical with push rod b33 size, structure phase
Together.
The course of work of utility model device is as follows:
When engine operation, engine crankshaft drives camshaft 20 and the cam 19 being connected thereon to rotate together, when convex
It takes turns 19 convex portions to rotate to when contacting with rocker arm a16, drives rocker arm a16 and pin shaft a18 movement, pin shaft a18 pushes push rod
A22 and pin shaft c39 movement, pin shaft c39 drive push rod b33, pin shaft b34 movement and pull rod 30 to move；However, working as 30 tail of pull rod
The collar stop 29 of portion's equipment is not drawn to when contacting with eccentric hoop block a25, eccentric hoop block b26, due to rocker arm a16 and rocker arm
B23 is connected with the sliding of rocker arm shaft 12, rocker arm a16 and push rod a22 slided with pin shaft a18 be connected, push rod a22 and push rod
B33 is connected with pin shaft c39 sliding, push rod b33 and rocker arm b23 are connected with pin shaft b34 sliding, in turn, pin shaft b34 and rocker arm
Thrust suffered by b23 is weaker, is not enough to overcome the pretightning force of valve spring 37, and valve 1 can not be pushed to open, rocker arm a16 and pin
Axis a18 moving displacement for generating under the driving of cam 19 be transformed to pin shaft c39 and its connected push rod b33, push rod a22 and
The moving displacement of pull rod 30, the collar stop 29 for pulling pull rod 30 connected are constantly leaned on to eccentric hoop block a25 and eccentric hoop block b26
Closely；When collar stop 29 contacts under push rod a22, push rod b33 and pin shaft c39 effect with eccentric hoop block a25, eccentric hoop block b26
Afterwards, pull rod 30, rocker arm a16, rocker arm b23, push rod a22 and push rod b33 be equivalent to become one can be around 12 axial line of rocker arm shaft
The rigid structure of rotation, the moving displacement driving rocker arm b23 movement that rocker arm a16 is generated under the effect of cam 19, and then drive gas
Door 1 unlatching and move down；After the maximum high spot of cam 19 turns over the rocker arm upper end a16, valve 1 is opened under the effect of valve spring 37
Beginning moves up and falls after rise, while under the pulling force effect of push rod reset spring a38 and push rod reset spring b40, pull rod 30, rocker arm
A16, rocker arm b23, push rod a22 and push rod b33 carry out return.
When engine operating condition changes, 1 lift characteristics of valve need to change, it is based on specific judgment principle, motor 9 passes through
Motor shaft 8 and control shaft 7 turn over specified angle, gear a24, gear b27, eccentric hoop block with moving gear c31 and gear d32
A25 and eccentric hoop block b26 turn over respective angles under the drive of gear c31 and gear d32 therewith, so that rocker arm shaft 12 and annular
The effective thickness of eccentric hoop block a25 and eccentric hoop block b26 are changed between block 29, so change collar stop 29 with
(pull rod 30, rocker arm a16, rocker arm b23, push rod a22 and push rod b33 are formed as one for eccentric hoop block a25 and eccentric hoop block b26 contact
A similar rigid structure around the rotation of 12 axial line of rocker arm shaft) when rocker arm a16 and pin shaft c39 need to run under the driving of camshaft 20
Displacement；When eccentric hoop block a25 and the eccentric hoop thickness block b26 are as between rocker arm shaft 12 and collar stop 29, cam 19
Driving rocker arm a16, which generates less displacement, can push pin shaft c39 to make collar stop 29 and eccentric hoop block a25 and eccentric hoop block
B26 is in contact, and can move with the driving of cam 19 with rear arm b23, valve 1 open, and then valve 1 can get it is biggish
Maximum lift and longer unlatching duration；When eccentric hoop block a25 and eccentric hoop block b26 thinnest part are as rocker arm shaft 12 and annular
When between block 29, cam 19 drive rocker arm a16 need to generate very big displacement just and can push pin shaft c39 make collar stop 29 with
Eccentric hoop block a25 and eccentric hoop block b26 are in contact, and then the lift of valve 1 and unlatching duration are relatively small.So logical
It crosses motor 9 and drives motor shaft 8, control shaft 7, gear c31, gear d32, gear a24, gear b27, eccentric hoop block a25 and bias
Ring block b26 goes to different angle, realizes eccentric hoop block a25 and eccentric hoop block b26 between collar stop 29 and rocker arm shaft 12
Actual (real) thickness change, and then realize that 1 lift of valve and the coupling of duration continuously change.
Compared with prior art, the beneficial effects of the utility model are:
The device for continuously changing valve stroke used by the utility model is motor, anti-for the variation of engine operating condition
Should be sensitiveer, the variation of valve stroke is more suitable for the variation of engine operating condition, and the variation of valve stroke is more steady, reduces
Noise.
Engine rod-pulling type variable valve gear described in the utility model uses double eccentric hoop block Double-gear blocks and passes
It is dynamic, so that pull rod is moved reciprocatingly, ensure that pull rod uniform force, increase pull rod service life, balances the power of rocker arm shaft, make
Pull rod rocker arm body reliable operation.
Engine rod-pulling type variable valve gear described in the utility model uses the double pusher structures of double rocker arms, passes through
The propulsion and retrogressing of pull rod, realizing valve stroke variation can be continuous in a certain range, meets high speed efficiency, low speed torque
Requirement, and torsion output be continuously linear.
Detailed description of the invention
Fig. 1 is the integrally-built main view of engine rod-pulling type variable valve gear；
Fig. 2 is cross-sectional view of the overall structure in the face A-A of engine rod-pulling type variable valve gear；
Fig. 3 is the integrally-built rearview of engine rod-pulling type variable valve gear；
Fig. 4 is the main view of rocker arm shaft 12 used by engine rod-pulling type variable valve gear；
Fig. 5 is the main view of rocker arm a16 used by engine rod-pulling type variable valve gear；
Fig. 6 is the main view of rocker arm b23 used by engine rod-pulling type variable valve gear；
Fig. 7 is the main view of push rod b33 used by engine rod-pulling type variable valve gear；
Fig. 8 is the main view of push rod a22 used by engine rod-pulling type variable valve gear；
Fig. 9 is the main view of pull rod 30 used by engine rod-pulling type variable valve gear；
Figure 10 is the main view of eccentric hoop block a25 used by engine rod-pulling type variable valve gear；
Figure 11 is the main view of eccentric hoop block b26 used by engine rod-pulling type variable valve gear；
Figure 12 is the main view of gear b27 used by engine rod-pulling type variable valve gear；
Figure 13 is the main view of gear a24 used by engine rod-pulling type variable valve gear；
Figure 14 is the main view of pin shaft a18 used by engine rod-pulling type variable valve gear；
Figure 15 is the main view of pin shaft b34 used by engine rod-pulling type variable valve gear；
Figure 16 is the main view of pin shaft c39 used by engine rod-pulling type variable valve gear；
In figure:
Valve 1, cylinder cap 2, motor mounting rack 3, control bracing strut 4, camshaft stand 5, limited ring dais a6, control shaft 7,
Motor shaft 8, motor 9, upper cover plate a10, limited ring dais b11, rocker arm shaft 12, limited ring dais c13, upper cover plate b14, limited ring dais
D15, rocker arm a16, snap ring a17, pin shaft a18, cam 19, camshaft 20, snap ring b21, push rod a22, rocker arm b23, gear a24,
Eccentric hoop block a25, it eccentric hoop block b26, gear b27, snap ring c28, collar stop 29, pull rod 30, gear c31, gear d32, pushes away
Bar b33, pin shaft b34, snap ring d35, snap ring e36, valve spring 37, push rod reset spring a38, pin shaft c39, push rod reset bullet
Spring b40, snap ring f41, snap ring g42.
Circular hole c1201, annular groove a1202, circular hole a1601, circular hole b1602, circular hole d2201, circular hole e2202, circular hole
F2301, circular hole g2302, circular hole h2401, circular hole i2501, circular hole k2601, circular hole m2701, circular hole r3301, circular hole o3302,
Cylindrical bar 3001, square block 3002, circular hole p3003, annular groove b1801, annular groove c1802, annular groove d3401, annular groove e3402, annular groove
F3901, annular groove g3902.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawing:
Refering to fig. 1-3, engine rod-pulling type variable valve gear described in the utility model includes with flowering structure: valve 1,
Cylinder cap 2, motor mounting rack 3, control bracing strut 4, camshaft stand 5, limited ring dais a6, control shaft 7, motor shaft 8, motor 9, on
Cover board a10, limited ring dais b11, rocker arm shaft 12, limited ring dais c13, upper cover plate b14, limited ring dais d15, rocker arm a16, snap ring
A17, pin shaft a18, cam 19, camshaft 20, snap ring b21, push rod a22, rocker arm b23, gear a24, eccentric hoop block a25, bias
Ring block b26, gear b27, snap ring c28, collar stop 29, pull rod 30, gear c31, gear d32, push rod b33, pin shaft b34, card
Ring d35, snap ring e36, valve spring 37, push rod reset spring a38, pin shaft c39, push rod reset spring b40, snap ring f41, snap ring
g42。
Refering to Fig. 4-16, engine rod-pulling type variable valve gear described in the utility model includes circular hole c1201, ring
Slot a1202, circular hole a1601, circular hole b1602, circular hole d2201, circular hole e2202, circular hole f2301, circular hole g2302, circular hole
H2401, circular hole i2501, circular hole k2601, circular hole m2701, circular hole r3301, circular hole o3302, cylindrical bar 3001, square block
3002, circular hole p3003, annular groove b1801, annular groove c1802, annular groove d3401, annular groove e3402, annular groove f3901, annular groove g3902.
Refering to fig. 1-3:
Valve 1 is mounted on cylinder cap 2, and the upper end is slidably connected with rocker arm b23；
Motor mounting rack 3, control bracing strut 4 and camshaft stand 5 are fixed on cylinder cap 2 with two bolts；Motor
Mounting rack 3 and motor 9 are connected；The structure for controlling bracing strut 4 and camshaft stand 5 is Y type, respectively control shaft 7 and rocker arm shaft
12 provide support, all open up a threaded hole at the top both ends of the two stands, are respectively intended to connection upper cover plate a10 and upper cover
Plate b14；
Limited ring dais a6 and limited ring dais b11 is connected in the left end of control shaft 7, upper cover plate a10 be placed in limited ring dais a6 and
Between limited ring dais b11, the cover board two sides are respectively equipped with a circular hole, control bracing strut 4 are bolted, with the limit
Position land collective effect, avoids 7 axial float of control shaft；
7 one end of control shaft and motor shaft 8 are connected, and one end is connected gear c31, gear d32；8 other end of motor shaft and electricity
Machine 9 is connected, and the torque that motor 9 provides is changed into the rotational motion of control shaft 7 by the transmitting of motor shaft 8, thus with moving gear
C31, gear d32 movement；
Rocker arm shaft 12 is for carrying rocker arm a16, rocker arm b23, gear a24, gear b27, eccentric hoop block a25, eccentric hoop block
B26, and the circular hole c1201 that is opened up by the rocker arm of pull rod 30 and 12 clearance fit of rocker arm shaft；
Limited ring dais c13 and limited ring dais d15 are connected on rocker arm shaft 12, and upper cover plate b14 is placed in limited ring dais c13 and limit
Between the land d15 of position, the cover board two sides are respectively equipped with a circular hole, camshaft stand 5 are bolted, with the limit
Land collective effect avoids 12 axial float of rocker arm shaft；
The one end rocker arm a16 is sleeved on rocker arm shaft 12 and is slidably connected therewith, the other end be sleeved on pin shaft a18 and with
Be slidably connected, and be slidably connected with cam 19；
Snap ring a17 and snap ring b21 are separately mounted on the annular groove that pin shaft a18 is opened up, and prevent rocker arm a16's and push rod a22
Axial float guarantees assembly safety；
Pin shaft a18's rocker arm a16 and push rod a22 has been slidably connected, and rocker arm a16 can be transmitted to push rod by the power of cam 19
On a22, push rod a22 movement is pushed；
Cam 19 is connected on camshaft 20, and camshaft 20 is moved with engine crankshaft, thus rotated with moving cam 19,
When cam 19 and rocker arm a16 are slidably connected, mono- downward power of rocker arm a16 can be given；
The one end push rod a22 is sleeved on pin shaft a18 and is slidably connected therewith, and the other end is sleeved on pin shaft c39 and slides therewith
Connection；
The one end rocker arm b23 is sleeved on rocker arm shaft 12 and is slidably connected therewith, and the other end is sleeved on pin shaft b34 and therewith
Sliding is connected, and rocker arm b23 is slidably connected with 1 upper end of valve, and valve 1 can be pushed to open；
Gear a24, gear b27 are successively sleeved on rocker arm shaft 12, with 12 clearance fit of rocker arm shaft, guarantee that assembly is smooth；
Gear c31 and gear d32 are connected in control shaft 7, when installation, gear a24 and gear d32 engagement, gear b27 and gear c31
The rotation of control shaft 7 is just become rocker arm shaft 12 and the thereon rotation of fastening member by engagement；
Eccentric hoop block a25 and gear a24 are fixed together, and eccentric hoop block b26 and gear b27 are fixed together；When installation,
It keeps eccentric hoop block a25 and eccentric hoop block b26 to be placed between gear a24 and gear b27, and keeps eccentric hoop block a25 and bias
The axial line of ring block b26 is overlapped；
Snap ring c28 is mounted on the annular groove that rocker arm shaft 12 opens up, and with limited ring dais d15 collective effect, avoids rocker arm shaft 12
On part occur axial float；
The circular hole and collar stop 29 that pull rod 30 is opened up by rocker arm shaft 12 are connected, collar stop 29 by with eccentric hoop block
A25, eccentric hoop block b26 difference sliding contact, so that pull rod 30 be driven to promote or retreat；The axial line and annular of pull rod 30 are kept off
The axial line of block 29 is overlapped and intersects vertically with the axial line of rocker arm shaft 12；30 other end of pull rod is sleeved on pin shaft c39, and with
Be slidably connected；
The one end push rod b33 is sleeved on pin shaft b34 and sliding is connected therewith, and the other end is sleeved on pin shaft c39 and therewith
Sliding is connected；
Pin shaft b34 is slidably connected push rod b33 and rocker arm b23, and the power on push rod b33 can be transmitted on rocker arm b23, pushed away
Shake arm b23 movement；
Snap ring d35, snap ring e36 are separately mounted in the annular groove that pin shaft b34 is opened up, and avoid the axis of rocker arm b23 and push rod b33
To play；
Valve spring 37 is mounted on around valve 1, there is certain pretightning force, when valve upper end stress is less than pretightning force,
It drives valve 1 to carry out return or maintains the state of valve 1 constant, and absorbable vibration and impact energy；
Push rod reset spring a38, push rod reset spring b40 have been separately connected rocker arm a16 and push rod a22 and rocker arm b23
With push rod b33, and there is certain pretightning force, absorb vibration and impact energy, there is reset function；
Pin shaft c39's push rod a22 has been slidably connected, push rod b33, pull rod 30, and power suffered by push rod a22 is passed to pull rod 30
With push rod b33, pushing drawing rod 30 and push rod b33 movement；
Snap ring f41 and snap ring g42 are separately mounted in the annular groove that pin shaft c39 is opened up, and are avoided push rod a22, push rod b33, are drawn
The axial float on pin shaft c39 of bar 30 guarantees that sports safety is reliable.
Refering to Fig. 4:
Rocker arm shaft 12 is connected limited ring dais c13 and limited ring dais d15, and upper cover plate a14 is placed in limited ring dais c13 and limit
Between land d15；The other end is equipped with circular hole c1201, and 30 cylinder body end of pull rod passes through circular hole c1201 and collar stop 29 is connected,
And with circular hole c1201 clearance fit, the axial line of circular hole c1201 intersects and vertical with the axial line of rocker arm shaft 12, ensure that and shake
30 uniform force of arm axle 12 and pull rod increases service life；Annular groove a1202, snap ring c28 set are equipped in the end of rocker arm shaft 12
In the annular groove, with the limited ring dais collective effect, the part axial play carried on rocker arm shaft 12 is avoided.
Refering to Fig. 5-6:
Rocker arm a16 is identical with rocker arm b23 structure size, avoids generating Caton during the motion；Divide on two rocker arm
Not She You circular hole a1601 and circular hole f2301, the aperture of the circular hole is identical, is slidably connected with rocker arm shaft 12；It is shaken described two
The other end of arm has circular hole b1602 and circular hole g2302 respectively, and the aperture of two circular hole is identical, and be slidably connected pin shaft respectively
A18, pin shaft b34；On rocker arm a16 the distance between described two circular holes axial line and two circular holes axial line described on rocker arm b23 it
Between distance it is identical.
Refering to Fig. 7-8:
Push rod a22 is identical with push rod b33 structure size, avoids that Caton occurs during the motion；The both ends push rod a22 point
Not She You circular hole d2201 and circular hole e2202, aperture is identical, and circular hole d2201 is slidably connected with pin shaft a18；The both ends push rod b33 point
Not She You circular hole r3301 and circular hole o3302, aperture is identical, and circular hole r3301 pin shaft b34 is slidably connected；Circular hole e2202 and circular hole
The aperture o3302 is identical, is slidably connected with pin shaft c39；Push rod a22 is identical with push rod b33 structure and the two circular hole axis thereon
The distance between heart is the same.
Refering to Fig. 9:
30 shaft of pull rod is cylindrical bar 3001, is square block 3002 at its end, side length is greater than body diameter, in square block
In be equipped with circular hole p3003, be slidably connected with pin shaft c39, in the circular hole front end, square block is cut into concentric with the circular hole
Circular arc reduces stress and concentrates, increases the service life of pull rod.
0-11 refering to fig. 1:
Eccentric hoop block a25 and eccentric hoop block b26 are respectively equipped with circular hole i2501 and circular hole k2601, the axial line of two circular holes with
The axial line of rocker arm shaft 12 is overlapped, and is guaranteed that the movement of two eccentric hoop blocks is steady, is conducive to installation；The circular hole aperture is identical,
With 12 clearance fit of rocker arm shaft；The parameter of two eccentric hoop blocks just as.
2-13 refering to fig. 1:
Gear b27 and gear a24 is respectively equipped with circular hole m2701 and circular hole h2401, and the pore size of two circular holes is identical,
It is overlapped with the axial line of 12 clearance fit of rocker arm shaft, two circular holes with the axial line of rocker arm shaft 12, guarantees that the movement of two gears is steady；
The parameter of two gear is identical.
4-16 refering to fig. 1:
Pin shaft a18, pin shaft b34, the both ends pin shaft c39 are all provided with that there are two identical annular grooves, respectively annular groove b1801, annular groove
C1802, annular groove d3401, annular groove e3402, annular groove f3901, annular groove g3902, be followed successively by snap ring a17, snap ring b21, snap ring e36,
Snap ring d35, snap ring g42, snap ring f41 provide installation site, prevent play of the multiple parts for being connected to pin shaft on pin shaft,
Make to connect relatively reliable, reduction motion artifacts.
The working principle of engine rod-pulling type changeable air valve:
When engine operation, engine crankshaft drives camshaft 20 and the cam 19 being connected thereon to rotate together, when convex
It takes turns 19 convex portions to rotate to when contacting with rocker arm a16, drives rocker arm a16 and pin shaft a18 movement, pin shaft a18 pushes push rod
A22 and pin shaft c39 movement, pin shaft c39 drive push rod b33, pin shaft b34 movement and pull rod 30 to move；However, working as 30 tail of pull rod
The collar stop 29 of portion's equipment is not drawn to when contacting with eccentric hoop block a25, eccentric hoop block b26, due to rocker arm a16 and rocker arm
B23 is connected with the sliding of rocker arm shaft 12, rocker arm a16 and push rod a22 slided with pin shaft a18 be connected, push rod a22 and push rod
B33 is connected with pin shaft c39 sliding, push rod b33 and rocker arm b23 are connected with pin shaft b34 sliding, in turn, pin shaft b34 and rocker arm
Thrust suffered by b23 is weaker, is not enough to overcome the pretightning force of valve spring 37, and valve 1 can not be pushed to open, rocker arm a16 and pin
Axis a18 moving displacement for generating under the driving of cam 19 be transformed to pin shaft c39 and its connected push rod b33, push rod a22 and
The moving displacement of pull rod 30, the collar stop 29 for pulling pull rod 30 connected are constantly leaned on to eccentric hoop block a25 and eccentric hoop block b26
Closely；When collar stop 29 contacts under push rod a22, push rod b33 and pin shaft c39 effect with eccentric hoop block a25, eccentric hoop block b26
Afterwards, pull rod 30, rocker arm a16, rocker arm b23, push rod a22 and push rod b33 be equivalent to become one can be around 12 axial line of rocker arm shaft
The rigid structure of rotation, the moving displacement driving rocker arm b23 movement that rocker arm a16 is generated under the effect of cam 19, and then drive gas
Door 1 unlatching and move down；After the maximum high spot of cam 19 turns over the rocker arm upper end a16, valve 1 is opened under the effect of valve spring 37
Beginning moves up and falls after rise, while under the pulling force effect of push rod reset spring a38 and push rod reset spring b40, pull rod 30, rocker arm
A16, rocker arm b23, push rod a22 and push rod b33 carry out return.
When engine operating condition changes, 1 lift characteristics of valve need to change, it is based on specific judgment principle, motor 9 passes through
Motor shaft 8 and control shaft 7 turn over specified angle, gear a24, gear b27, eccentric hoop block with moving gear c31 and gear d32
A25 and eccentric hoop block b26 turn over respective angles under the drive of gear c31 and gear d32 therewith, so that rocker arm shaft 12 and annular
The effective thickness of eccentric hoop block a25 and eccentric hoop block b26 are changed between block 29, so change collar stop 29 with
(pull rod 30, rocker arm a16, rocker arm b23, push rod a22 and push rod b33 are formed as one for eccentric hoop block a25 and eccentric hoop block b26 contact
A similar rigid structure around the rotation of 12 axial line of rocker arm shaft) when rocker arm a16 and pin shaft c39 need to run under the driving of camshaft 20
Displacement；When eccentric hoop block a25 and the eccentric hoop thickness block b26 are as between rocker arm shaft 12 and collar stop 29, cam 19
Driving rocker arm a16, which generates less displacement, can push pin shaft c39 to make collar stop 29 and eccentric hoop block a25 and eccentric hoop block
B26 is in contact, and can move with the driving of cam 19 with rear arm b23, valve 1 open, and then valve 1 can get it is biggish
Maximum lift and longer unlatching duration；When eccentric hoop block a25 and eccentric hoop block b26 thinnest part are as rocker arm shaft 12 and annular
When between block 29, cam 19 drive rocker arm a16 need to generate very big displacement just and can push pin shaft c39 make collar stop 29 with
Eccentric hoop block a25 and eccentric hoop block b26 are in contact, and then the lift of valve 1 and unlatching duration are relatively small.So logical
It crosses motor 9 and drives motor shaft 8, control shaft 7, gear c31, gear d32, gear a24, gear b27, eccentric hoop block a25 and bias
Ring block b26 goes to different angle, realizes eccentric hoop block a25 and eccentric hoop block b26 between collar stop 29 and rocker arm shaft 12
Actual (real) thickness change, and then realize that 1 lift of valve and the coupling of duration continuously change.
Claims (8)
1. a kind of engine rod-pulling type variable valve gear, it is characterised in that by valve (1), cylinder cap (2), motor mounting rack (3),
Control bracing strut (4), camshaft stand (5), limited ring dais a (6), control shaft (7), motor shaft (8), motor (9), upper cover plate a
(10), limited ring dais b (11), rocker arm shaft (12), limited ring dais c (13), upper cover plate b (14), limited ring dais d (15), rocker arm a
(16), snap ring a (17), pin shaft a (18), cam (19), camshaft (20), snap ring b (21), push rod a (22), rocker arm b (23), tooth
Take turns a (24), eccentric hoop block a (25), eccentric hoop block b (26), gear b (27), snap ring c (28), collar stop (29), pull rod
(30), gear c (31), gear d (32), push rod b (33), pin shaft b (34), snap ring d (35), snap ring e (36), valve spring
(37), push rod reset spring a (38), pin shaft c (39), push rod reset spring b (40), snap ring f (41), snap ring g (42) composition；
Wherein, motor mounting rack (3), control bracing strut (4) and camshaft stand (5) are fixed on cylinder cap (2) by bolt, are limited
Position land a (6) and limited ring dais b (11) is fixed in control shaft (7) outer surface, and upper cover plate a (10) and control bracing strut (4) are placed in
Between limited ring dais a (6) and limited ring dais b (11), and it is connected by bolt；Control shaft (7) is placed in upper cover plate a (10) and control
Between bracing strut (4), clearance fit；Motor (9) is fixed on motor mounting rack (3), motor shaft (8) one end and motor (9) phase
Even, one end is connected with control shaft (7)；Camshaft stand (5) and upper cover plate b (14) are placed in limited ring dais c (13) and limited ring dais d
(15) between, it is connected by bolt, and is connected with rocker arm shaft (12) sliding；Limited ring dais c (13) and limited ring dais d (15) are affixed
In rocker arm shaft (12) outer surface；Rocker arm a (16) and rocker arm b (23) is set in rocker arm shaft (12) outer surface, and is slidably connected；It is convex
Wheel (19) is fixed in camshaft (20) outer surface, and is connected with rocker arm a (16) sliding；Rocker arm b (23) is outstanding to be placed on valve (1) top
End, and sliding is connected therewith；
Pin shaft a (18) is each passed through the circular hole d (2201) that the circular hole b (1602) that rocker arm a (16) is opened up and push rod a (22) are opened up,
And it is slidably connected；Snap ring a (17) and snap ring b (21) is placed in annular groove b (1801), the annular groove c that pin shaft a (18) both ends open up
(1802) in；Pin shaft b (34) is each passed through the circular hole r (3301) of the circular hole g (2302) and push rod b (33) of rocker arm b (23), and sliding
Dynamic connection；Snap ring d (35), snap ring e (36) are placed in annular groove e (3402), the annular groove d (3401) that pin shaft b (34) both ends open up；
Pin shaft c (39) is each passed through the circular hole e (2202) and push rod b that circular hole p (3003), the push rod a (22) that pull rod (30) opens up are opened up
(33) the circular hole o (3302) opened up, and be slidably connected；Pin shaft c (39) both ends that are placed in snap ring f (41) and snap ring g (42) open up
Annular groove g (3902), annular groove f (3901) in；
Gear a (24), eccentric hoop block a (25), eccentric hoop block b (26) and gear b (27) are sleeved on rocker arm shaft (12), and with
Clearance fit；Gear a (24) and eccentric hoop block a (25) are fixed together, and eccentric hoop block b (26) and gear b (27) are fixed in
Together；Pull rod (30) one end is connected with pin shaft c (39), and one end passes through the circular hole c (1201) that rocker arm shaft (12) open up and annular is kept off
Block (29) is affixed；Eccentric hoop block a (25) and eccentric hoop block b (26) is placed in pull rod (30) two sides, collar stop (29) and eccentric
Ring block a (25) is connected with the sliding of (26) outer surface eccentric hoop block b；Gear d (32) and gear c (31) are fixed on control shaft (7),
And it is engaged respectively with gear a (24) and gear b (27)；Push rod reset spring a (38) is connected with rocker arm a (16) and push rod a (22),
And there is certain pulling force pretightning force；Push rod reset spring b (40) is connected with rocker arm b (23) and push rod b (33), and has certain
Pulling force pretightning force.
2. a kind of engine rod-pulling type variable valve gear according to claim 1, it is characterised in that the rocker arm a (16) sets
There are circular hole a (1601) and circular hole b (1602), the rocker arm b (23) is equipped with circular hole f (2301) and circular hole g (2302), the push rod
A (22) is equipped with hole d (2201) and circular hole e (2202), and the push rod b (33) is equipped with circular hole r (3301), circular hole o (3302)；Circular hole
A (1601) and circular hole f (2301) and rocker arm shaft (12) sliding are connected, circular hole b (1602) and circular hole d (2201) and pin shaft a (18)
Sliding is connected, and circular hole e (2202) and circular hole o (3302) are connected with pin shaft c (39) sliding, circular hole r (3301) and circular hole g (2302)
It is connected with pin shaft b (34) sliding.
3. a kind of engine rod-pulling type variable valve gear according to claim 1, it is characterised in that the pull rod (30) one
End is equipped with cylindrical bar (3001), and one end is equipped with square block (3002), and is additionally provided with circular hole p (3003) in square block (3002), circle
Hole p (3003) is connected with pin shaft c (39) sliding.
4. a kind of engine rod-pulling type variable valve gear according to claim 1, it is characterised in that the eccentric hoop block a
(25) circular hole i (2501) are equipped with, eccentric hoop block b (26) is equipped with circular hole k (2601), and gear a (24) is equipped with circular hole h (2401), tooth
It takes turns b (27) and is equipped with circular hole m (2701), circular hole i (2501), (2701) four hole circular hole k (2601), circular hole h (2401) and circular hole m
Diameter is identical, and with rocker arm shaft (12) clearance fit.
5. a kind of engine rod-pulling type variable valve gear according to claim 1, it is characterised in that the rocker arm shaft (12)
Equipped with circular hole c (1201), annular groove a (1202), the axial line of circular hole c (1201) intersects and hangs down with the axial line of rocker arm shaft (12)
Directly.
6. a kind of engine rod-pulling type variable valve gear according to claim 1, it is characterised in that the pin shaft a (18) two
End is equipped with identical annular groove b (1801), annular groove c (1802), and respectively snap ring a (17), snap ring b (21) provide installation site；Pin shaft b
(34) both ends are equipped with identical annular groove d (3401), annular groove e (3402), and respectively snap ring e (36), snap ring d (35) provide installation position
It sets；(39) both ends pin shaft c are equipped with identical annular groove f (3901), annular groove g (3902), and respectively snap ring g (42), snap ring f (41) are provided
Installation site.
7. a kind of engine rod-pulling type variable valve gear according to claim 1, it is characterised in that the circular hole a (1601)
It is identical as circular hole f (2301) and circular hole g (2302) axial line spacing with circular hole b (1602) axial line spacing；Circular hole d (2201) and
Circular hole e (2202) axial line spacing is identical as circular hole r (3301) and circular hole o (3302) axial line spacing.
8. a kind of engine rod-pulling type variable valve gear according to claim 1, it is characterised in that the rocker arm a (16)
Identical with the size of rocker arm b (23), structure is identical；Push rod a (22) is identical with push rod b (33) size, and structure is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821778205.2U CN209398473U (en) | 2018-10-31 | 2018-10-31 | A kind of engine rod-pulling type variable valve gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821778205.2U CN209398473U (en) | 2018-10-31 | 2018-10-31 | A kind of engine rod-pulling type variable valve gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209398473U true CN209398473U (en) | 2019-09-17 |
Family
ID=67879114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821778205.2U Withdrawn - After Issue CN209398473U (en) | 2018-10-31 | 2018-10-31 | A kind of engine rod-pulling type variable valve gear |
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| Country | Link |
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| CN (1) | CN209398473U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339898A (en) * | 2018-10-31 | 2019-02-15 | 吉林大学 | A kind of engine rod-pulling type variable valve gear |
| CN111878186A (en) * | 2020-07-22 | 2020-11-03 | 武汉理工大学 | Cam direct-drive type valve mechanism for realizing continuous variable of engine valve lift |
-
2018
- 2018-10-31 CN CN201821778205.2U patent/CN209398473U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339898A (en) * | 2018-10-31 | 2019-02-15 | 吉林大学 | A kind of engine rod-pulling type variable valve gear |
| CN109339898B (en) * | 2018-10-31 | 2024-03-22 | 吉林大学 | Pull rod type variable valve device of engine |
| CN111878186A (en) * | 2020-07-22 | 2020-11-03 | 武汉理工大学 | Cam direct-drive type valve mechanism for realizing continuous variable of engine valve lift |
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