CN105626179B - Variable valve timing system and its Vidacare corp - Google Patents

Abstract

The present invention relates to a kind of variable valve timing system and the Vidacare corps for variable valve timing system.The Vidacare corp includes：Camshaft, the first drive shaft and the first sliding sleeve in same axial direction, the drive shaft of the camshaft/first extend to intracavitary in the first sliding sleeve, to form the first connecting portion/second connecting portion that can be in the axial direction relatively moved with first sliding sleeve along the axial forwards/reverse；There is the first helical tooth on the first connecting portion outer wall, there is the second helical tooth, the inner wall of first sliding sleeve has the second helicla flute with the first helicla flute of the first helical tooth threaded engagement and with the second helical tooth threaded engagement on the second connecting portion outer wall；First helicla flute and the second helicla flute are poor with opposite spiral angle when the hand of spiral is axial.The present invention can steadily, accurately control change valve timing.

Description

Variable valve timing system and its Vidacare corp

Technical field

The present invention relates to automobile manufacturing field, more particularly to a kind of variable valve timing system and for variable valve timing The Vidacare corp of system.

Background technology

In order to improve the fuel economy of engine, reducing exhaust emission and improve power performance, more and more automobiles Engine changes the valve timing of inlet valve and exhaust valve using variable valve timing (usual abbreviation VVT systems) technology, Change inlet valve and exhaust valve opening and closing moment.

Currently widely used VVT systems are the VVT systems of hydraulic-driven.

The VVT systems of a kind of prior art, as shown in Figure 1, including phase converter 10 (vertical section), with reference to tune shown in Fig. 2 The Sidelong portion structure of phase device 10：Phase converter 10 includes 101 belt pulley of outer ring and inner ring 100, group between inner ring 100 and outer ring 101 Into by blade 102 divide for the oil pocket 103 of A chambers and B chambers (only illustrate oil pocket 103 in Fig. 2, phase converter 10 has several oil pockets, The structure of other oil pockets is with reference to oil pocket 103).

With continued reference to Fig. 1, the VVT systems further include：It connects the A oil ducts 11 of A chambers and connects the B oil ducts 12 of B chambers.VVT System further includes：Oil path control system as shown in Figure 3, the oil path control system include controlling the A oil ducts 11 and B oil ducts 12 solenoid valve 13.When the high pressure oil from lubricating oil pump distributes to A oil ducts 11 by solenoid valve 13, high-pressure oil duct 14 and A oil Road 11 connects, and B oil ducts 12 connect automatically with draining road 15, at this point, the pressure of A chambers be more than B chambers, blade 102 by oil pressure push to Low pressure chamber B is moved, and due to the inside groove of blade insertion inner ring 100, therefore blade 102 drives inner ring 100 that up time occurs with respect to outer ring 101 Needle rotates；Conversely, when solenoid valve 13 connects the high-pressure oil duct 14 from lubricating oil pump with B oil ducts 12, A oil ducts 11 connect draining Road 15, the opposite outer ring 101 of the meeting of inner ring 100 rotate counterclockwise.

With continued reference to Fig. 1, the VVT systems further include：Camshaft 16, inner ring 100 are rigidly connected with camshaft 16.When interior When outer ring phase changes due to above-mentioned oil circuit changes, also change the cam (not shown) that camshaft 16 is connected and drive It takes offence opening and closing moment of door.

The above-mentioned VVT systems of the prior art at least have the disadvantage that：

For the VVT systems of above-mentioned hydraulic-driven, oil circuit control based on hydraulic pump, and hydraulic pump for engine from The lubricating oil pump of band.Due to machine oil air pump inoperative before engine start, without engine oil pressure, therefore VVT systems are before oil pressure foundation Valve timing cannot be driven to change position.Using the automobile of the VVT systems of prior art hydraulic-driven, can also it start automobile hair Because timing malposition causes automobile engine abnormal sound and vibration during motivation；In addition, answering due to some new technologies of engine With (for example, start-stop technology, Atkinson cycles), it is desirable to can just be adjusted to camshaft phase require position before an engine is started The adjusting angle of bigger is put or needs, the VVT systems of existing hydraulic-driven cannot preferably be met the requirements.

Further more, the VVT systems of hydraulic-driven are influenced by engine oil pressure fluctuation, it is difficult to accurate control valve timing and response Time；

In addition, the VVT systems of hydraulic-driven can also be limited by hydraulic pressure cavity space, the angle adjustable of valve timing is limited, one As within 30 degree corners, use scope is limited, if necessary to the VVT systems of exploitation bigger angle adjustable, then need more substantially The phase converter of product and axial length；But the increase of phase converter volume, arrangement space is required also can accordingly increase, also can So that phase converter quality increases, rotary inertia is promoted, and can increase timing drive belt or chain in the velocity variations of automobile Load.

Invention content

The technical issues of technical solution of the present invention solves is to provide a kind of electric drive that can change valve timing VVT system and devices, at least to overcome one of defect caused by the VVT systems of hydraulic-driven.

In order to solve the above-mentioned technical problem, technical solution of the present invention provides a kind of electricity for variable valve timing system Dynamic driving device changes the timing that opens or closes for setting inlet valve and at least one of exhaust valve within the engine, packet It includes：Camshaft, the first drive shaft and the first sliding sleeve in same axial direction, the camshaft extend to the along the axial forward direction Intracavitary, the first connecting portion that can be in the axial direction relatively moved with first sliding sleeve with formation in one sliding sleeve, first driving Axis along the axial direction it is oppositely extending to intracavitary in the first sliding sleeve, to form what can in the axial direction be relatively moved with first sliding sleeve Second connecting portion；First sliding sleeve can be electrically driven to generate axial displacement, and can be rotated around the axial direction；

On the first connecting portion outer wall there is the first helical tooth, there is the second spiral on the second connecting portion outer wall Tooth, the inner wall of first sliding sleeve have with the first helicla flute of the first helical tooth threaded engagement and with described second Second helicla flute of helical tooth threaded engagement；First helicla flute and the second helicla flute have phase when the hand of spiral is axial To spiral angle it is poor.

Optionally, the Vidacare corp further includes：Motor group, the motor group are suitable for driving the first sliding sleeve edge It is axially moved.

Optionally, the Vidacare corp further includes：Second sliding sleeve, first sliding sleeve are socketed on described second and slide It covers and mutually in the axial direction with the second sliding sleeve associated movement, the second sliding sleeve outer wall is arranged with sliding tooth, the sliding tooth Orientation it is consistent with the axial direction；

The motor group includes：Second drive shaft and motor, the motor have motor gear；Second drive shaft Both ends are respectively arranged with the first drive gear and the second drive gear, first drive gear and the driving tooth engagement, institute The second drive gear is stated to engage with the motor gear.

Optionally, second sliding sleeve is opposing stationary around the first sliding sleeve axial direction.

Optionally, first sliding sleeve and the second sliding sleeve are all circular ring type, and the sliding tooth is annular tooth.

Optionally, there is annular spring slot on the opening inner wall of second sliding sleeve；

The Vidacare corp further includes：Cyclic annular clamp spring, the ring-type clamp spring are set to the jump-ring slot in assembling It is interior, and limit first sliding sleeve and remove.

Optionally, second drive gear is reduction gearing, and the size of second drive gear is more than described first Driving dimensions.

Optionally, second drive gear is equipped with lightening hole.

Optionally, the motor group further includes：Motor mount, second drive shaft and motor are pacified set on the motor It fills in seat.

Optionally, first drive shaft passes through the first sliding sleeve inner cavity to form connection axle journal, first connection Portion has the axially extending bore with the connection axle journal connection cooperation.

Optionally, the Vidacare corp further includes：Torsional spring；

The first connecting portion has circular ring type spindle nose, and the outer diameter of the spindle nose and the internal diameter of the first sliding sleeve inner cavity are fitted Match, the endoporus of the spindle nose connects with the axially extending bore and is suitable for accommodating the torsional spring；The internal diameter of the spindle nose is more than described The internal diameter of axially extending bore, the first connecting portion of axially extending bore part connect with spindle nose and form the first ring perpendicular to axial direction Face；

The diameter of axle of the second connecting portion is adapted to the internal diameter of the first sliding sleeve inner cavity, and the axle journal of the connection axle journal is small In the diameter of axle of the second connecting portion, the second connecting portion connects with connecting axle journal and forms second perpendicular to axial direction Anchor ring, second anchor ring are opposite with the first anchor ring；

First anchor ring and the second anchor ring are respectively arranged with the mounting hole of the fixed torsion spring end.

Optionally, first helical tooth is set on the spindle nose.

Optionally, first helicla flute has the first section, and first helical tooth has and first helicla flute First sliding surface of cooperation；First helicla flute is that first section is rotated around central axis and axially simultaneously movement is formed , first section is perpendicular to central axis；

Second helicla flute has the second section, and second helical tooth has the coordinated with second helicla flute Two sliding surfaces；Second helicla flute is that second section rotates around central axis and axially simultaneously moves to be formed, described Second section is perpendicular to central axis；

First helicla flute and the second helicla flute avoid interlocking in spiral rotating, the spiral rotation of first helicla flute It is opposite with the spiral rotating direction of second helicla flute to turn direction.

Optionally, the number of first helical tooth is greater than or equal to 2, and the number of second helical tooth is greater than or equal to 2；Each first helical tooth is corresponding with the first helicla flute of adaptation, and each second helical tooth is corresponding with the second helicla flute of adaptation, It is arranged in parallel between first helicla flute, is arranged in parallel between second helicla flute.

Optionally, first helical tooth is using the camshaft axle center as the center of circle, angularly circumference is arranged in described On one connecting portion；Second helical tooth is using the first drive shaft axle center as the center of circle, and angularly circumference is arranged in described On two connecting portions.

Optionally, the distance of first helicla flute and the second helicla flute in the axial direction is rotated with it around the axial screw Angle be in proportionate relationship.

Optionally, the Vidacare corp further includes：Driving wheel；First drive shaft is suitable for transmitting the driving wheel Torque；The driving wheel is driven to synchronize rotation by engine crankshaft.

Optionally, the Vidacare corp further includes：Along it is described it is axial, through the camshaft, the first drive shaft and The oil duct of first sliding sleeve；The camshaft corresponds to the oil duct and forms axially extending bore, and first drive shaft corresponds to the oil duct Axial oilhole and oil groove are formed, first sliding sleeve corresponds to the oil duct and forms the oilhole for running through inside and outside wall.

In order to solve the above-mentioned technical problem, technical solution of the present invention additionally provides a kind of variable valve timing system, including： Vidacare corp and ECU controllers as described above, the ECU controllers are suitable for according at least to camshaft location and engine Crank position controls the electric drive displacement of first sliding sleeve.

The advantageous effect of technical solution of the present invention includes at least：

Technical solution of the present invention changes valve timing using electric drive, uses first the first helicla flute of sliding sleeve and camshaft The threaded engagement of the threaded engagement of first helical tooth, first the second helicla flute of sliding sleeve and first the second helical tooth of drive shaft, will be by The axial displacement of electrically driven (operated) first sliding sleeve is converted into camshaft and the opposed helical angle of the spaced winding axial direction of the first drive shaft is poor, So as to achieve the purpose that change valve timing with electric drive.Technical solution of the present invention is compact-sized, small, and arrangement is convenient, into This is cheap.

Valve timing due to changing VVT systems with electric drive and is easy to control not by engine oil pressure influence of fluctuations, can More accurately control valve timing precision and response time.The displacement of first sliding sleeve is converted into convex by technical solution of the present invention Wheel shaft and the opposed helical angle of the spaced winding axial direction of the first drive shaft are poor, thus can set displacement and valve timing adjustable angle The proportionate relationship of degree expands the angle adjustable range of valve timing, is all to be more easy to modulate with reference to automatically controlled precision and control dynamics , for technical solution of the present invention, can adapt to the VVT systems of exploitation bigger angle adjustable, without worry VVT systems and its The volume and quality problems of Vidacare corp.

Compared with the VVT systems of prior art hydraulic-driven, the VVT systems based on technical solution of the present invention are driven by electric power Dynamic, control is more accurate, and the inertia smaller of rotating motion part to the load impacting smaller of timing chain or timing belt, is being started Machine igniting can be achieved with phase adjusted before starting, engine abnormal noise and vibration when avoiding startup.

In technical solution of the present invention, make on the outside of belt wheel to cam (with camshaft suitable for the Vidacare corp of VVT systems Connection) distance than on the outside of hydraulic-driven VVT phase converters to cam apart from smaller, therefore the engine shaft of technical solution of the present invention To more compact structure.Based on motor powered driving device, technical solution of the present invention no longer needs lubricating oil pump oil pressure actuated, and automobile is not The lubricating oil pump of larger displacement is needed to configure, so as to reduce the energy consumption of lubricating oil pump.

Compared with the prior art for the VVT systems of hydraulic-driven, the VVT systems based on technical solution of the present invention are because no longer needing The lubricating oil pump of larger displacement is wanted, therefore the lubricating oil pump of small displacement can be used to reduce cost；VVT systems based on technical solution of the present invention System also simplifies automobile control oil circuit, can reduce in automobile with controlling the relevant processing and manufacturing cost of oil circuit；Based on skill of the present invention The VVT systems of art scheme are since the rotary inertia of structure is relatively smaller to the VVT systems of prior art hydraulic-driven, rotation speed change When it is also small to the load impacting of timing chain or timing belt, so, can be with for timing chain drive system or timing belt drive system Using more cheap part, further reduce the cost.Powder metallurgy system can be used to the correlated parts of technical solution of the present invention It makes, the manufacture cost of technical solution of the present invention is made to have more advantage.

Description of the drawings

Fig. 1 is a kind of VVT system structure diagrams of prior art；

Fig. 2 is a kind of Sidelong portion structure diagram of phase converter of the prior art；

Fig. 3 is a kind of oil path control system schematic diagram of prior art VVT systems；

Fig. 4 is the structure diagram of a kind of Vidacare corp that technical solution of the present invention provides；

Fig. 5 is the structure diagram of a kind of inner sliding sleeve that technical solution of the present invention provides；

Fig. 6 is the movement that sliding sleeve axial displacement is changed into the rotation of camshaft relative drive shaft in technical solution of the present invention One of schematic diagram；

Fig. 7 is the movement that sliding sleeve axial displacement is changed into the rotation of camshaft relative drive shaft in technical solution of the present invention The two of schematic diagram；

Fig. 8 is the movement that sliding sleeve axial displacement is changed into the rotation of camshaft relative drive shaft in technical solution of the present invention The three of schematic diagram；

Fig. 9 is the structure diagram of a kind of camshaft that technical solution of the present invention provides；

Figure 10 is a kind of drive shaft that technical solution of the present invention provides and the attachment structure schematic diagram of driving wheel；

Figure 11 is the structure diagram of a kind of drive shaft that technical solution of the present invention provides；

Figure 12 is the sectional view of drive shaft in an axial direction described in Figure 11；

Figure 13 is the structure diagram of another Vidacare corp that technical solution of the present invention provides；

Figure 14 is the assembling schematic diagram of motor group that technical solution of the present invention provides；

Figure 15 is the outer sliding sleeve and the matching relationship schematic diagram of motor group that technical solution of the present invention provides；

Figure 16 is the setting schematic diagram for two kinds of sliding sleeve sliding tooths for being applicable to outer sliding sleeve that technical solution of the present invention provides；

Figure 17 is the assembling schematic diagram of Vidacare corp shown in Figure 13；

Figure 18 is the structure diagram of a kind of outer sliding sleeve that technical solution of the present invention provides；

Figure 19 is the structure diagram of a kind of clamp spring that technical solution of the present invention provides；

Figure 20 is the structure diagram of another Vidacare corp that technical solution of the present invention provides；

Figure 21 provides the connection relationship diagram of a kind of camshaft, drive shaft and torsional spring for technical solution of the present invention；

Figure 22 is the assembling schematic diagram of Vidacare corp shown in Figure 20；

Figure 23 provides a kind of structure diagram of driving wheel for technical solution of the present invention；

Figure 24 provides a kind of control circuit schematic diagram of variable valve timing system for technical solution of the present invention；

Figure 25 is the change curve of input cam axis torque when applied analysis is carried out to technical solution of the present invention；

Figure 26 is that motor speed when applied analysis is carried out to technical solution of the present invention under the general governing speed of input becomes Change curve graph；

Figure 27 is the motor speed after 1 times of governing speed of quickening of input when applied analysis is carried out to technical solution of the present invention Change curve；

Figure 28 is to carry out drive shaft thrust ring under the general governing speed obtained during applied analysis to technical solution of the present invention To the change curve of the thrust of cylinder head annular groove；

Figure 29 is to carry out the 1 times of governing speed rear drive shaft thrust of quickening obtained during applied analysis to technical solution of the present invention Ring is to the change curve of the thrust of cylinder head annular groove；

Figure 30 is to carry out operating motor under the general governing speed obtained during applied analysis to technical solution of the present invention to turn round The change curve of square；

Figure 31 is that operating motor after the 1 times of governing speed of quickening obtained during applied analysis is carried out to technical solution of the present invention The change curve of torque；

Figure 32 is to carry out operating motor work(under the general governing speed obtained during applied analysis to technical solution of the present invention The change curve of rate；

Figure 33 is that operating motor after the 1 times of governing speed of quickening obtained during applied analysis is carried out to technical solution of the present invention The change curve of power；

Figure 34 is to carry out the general governing speed lower cam axis obtained during applied analysis and driving to technical solution of the present invention The curve graph of phase change between axis；

Figure 35 is that camshaft and drive after the 1 times of governing speed of quickening obtained during applied analysis are carried out to technical solution of the present invention The curve graph of phase change between moving axis；

Figure 36 is the displacement that outer sliding sleeve under the general governing speed obtained during applied analysis is carried out to technical solution of the present invention The curve graph of variation；

Figure 37 is the position that outer sliding sleeve after the 1 times of governing speed of quickening obtained during applied analysis is carried out to technical solution of the present invention Move the curve graph of variation；

Figure 38 is to carry out outer sliding sleeve and motor under the general governing speed obtained during applied analysis to technical solution of the present invention The change curve of group drive gear intermolecular forces；

Figure 39 is that outer sliding sleeve and electricity after the 1 times of governing speed of quickening obtained during applied analysis are carried out to technical solution of the present invention The change curve of unit drive gear intermolecular forces；

Figure 40 is to carry out axis suffered by the general governing speed lower cam axis obtained during applied analysis to technical solution of the present invention To the change curve of active force；

Figure 41 is suffered by camshaft after 1 times of governing speed of quickening to being obtained during technical solution of the present invention progress applied analysis The change curve of axial force.

Specific embodiment

In order to enable the purpose of the present invention, feature and effect more obvious understandable, below in conjunction with the accompanying drawings to the present invention's Specific embodiment elaborates.

Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still the present invention can be with Implemented using other different from mode described here, therefore the present invention is not limited by following public specific embodiment.

Embodiment one

A kind of Vidacare corp for variable valve timing system is present embodiments provided, it is changeable to be arranged on hair Inlet valve and at least one of exhaust valve in motivation open or close timing.

As shown in figure 4, the Vidacare corp of the present embodiment includes：Camshaft 20, drive shaft 21 in same axial direction And sliding sleeve 22, wherein：For camshaft 20 for driving valve or rocking arm, camshaft 20 is equipped with several cams (being not shown in Fig. 4), Camshaft 20 drives the opening and closing of engine valve (inlet valve or exhaust valve) in rotation by cam；Drive shaft 21 Main function is to transmit the torque come to automobile engine driving wheel.

The application realizes the rotation of camshaft 20 based on following invention thinking：Sliding sleeve 22 can be electrically driven to generate axial position Shifting amount；The axial displacement that sliding sleeve 22 is electrically driven generation by the application is converted into camshaft 20 and the spaced winding axial direction of drive shaft 21 The relative angular difference of rotation, to realize the rotation of camshaft 20.

The type of drive of sliding sleeve 22 can there are many, can be set by the electric drive other than the present embodiment Vidacare corp Standby control driving can also be electrically driven the motor device control driving built in device.The present embodiment does not limit sliding sleeve 22 Type of drive.

With reference to Fig. 4, lower mask body inquires into the specific implementation process of the present embodiment：

The present embodiment makes sliding sleeve 22 when with axial displacement with the spiral angle with camshaft 20 around axial-rotation, With the spiral angle with drive shaft 21 around axial-rotation while making sliding sleeve 22 when with axial displacement.

First, positive (arrow direction in Fig. 4) extends to intracavitary in sliding sleeve 22, with formed can be with to camshaft 20 in an axial direction The connecting portion 200 that sliding sleeve 22 relatively moves in the axial direction, since Fig. 4 is the part drawing before assembling, connecting portion 200 is used to deeply slide 22 inner cavities are covered, with 22 threaded engagement of sliding sleeve.

With continued reference to Fig. 4, connecting portion 200 and the threaded engagement mode of sliding sleeve 22 are：There is spiral on 200 outer wall of connecting portion Tooth 201, the inner wall of sliding sleeve 22 have the helicla flute 220 with 201 threaded engagement of helical tooth.Above-mentioned helical tooth 201 and helicla flute 220 It is mutual joint match, the two all has in direction of displacement in an axial direction around axial spiral angle.The present embodiment is to spiral The logarithm of tooth 201 and helicla flute 220 is not defined, and according to assembling principle, only sets the helical tooth 201 of a pile threaded engagement And helicla flute 220 is also feasible, its object is to make sliding sleeve 22 that helicla flute 220 be driven to progressively disengage or be embedded in helical tooth 201 When, the spiral angle based on helical tooth 201 and helicla flute 220 drives camshaft 20 around axial-rotation；But it may be mentioned that General setting is circumferential equally distributed several to helical tooth 201 and helicla flute 220 along connecting portion 200 and sliding sleeve 22, is conducive to drive The overall stability of dynamic device.

With continued reference to Fig. 4, along the axial direction, reversely (arrow direction is reversed in Fig. 4) extends in sliding sleeve 22 drive shaft 21 Intracavitary, the connecting portion 210 that can be in the axial direction relatively moved with sliding sleeve 22 with formation.Since Fig. 4 is the part drawing before assembling, connect Portion 210 is for going deep into 22 inner cavity of sliding sleeve, with 22 threaded engagement of sliding sleeve.Connecting portion 200 can go deep into from 22 side of sliding sleeve in sliding sleeve 22 Chamber, connecting portion 210 can go deep into 22 inner cavity of sliding sleeve from 22 opposite side of sliding sleeve.Connecting portion 210 and the threaded engagement mode of sliding sleeve 22 are：

There is helical tooth 211, the inner wall of sliding sleeve 22 has the spiral shell with 211 threaded engagement of helical tooth on 210 outer wall of connecting portion Spin slot 221.Above-mentioned helical tooth 211 and helicla flute 221 are mutual joint matchs, and the two all has in direction of displacement in an axial direction Around axial spiral angle.The cooperation principle of helical tooth 211 and helicla flute 221 is with helical tooth 201 and helicla flute 220, based on spiral shell Revolve the cooperation of tooth 211 and helicla flute 221, when sliding sleeve 22 generates axial displacement, sliding sleeve 22 drive helicla flute 221 progressively disengage or Embedded helical tooth 211, and the spiral angle based on helical tooth 211 and helicla flute 221 drive drive shaft 21 around axial-rotation.

In the present embodiment, based on the spiral angle that helical tooth 201 and helicla flute 220 are formed with based on helical tooth 211 and The spiral angle that helicla flute 221 is formed has around axial relative angular difference；Generation axial displacement is electrically driven in sliding sleeve 22 When, sliding sleeve 22 drives camshaft 20 and drive shaft 21 to have relative rotation between axial-rotation, camshaft 20 and drive shaft 21 Differential seat angle.

In the Vidacare corp described in the present embodiment, sliding sleeve 22 can be realized around axial rotation, also, sliding sleeve 22 can It is electrically driven to move axially.Camshaft 20 and drive shaft 21 are fixed in the axial direction, cannot can be moved around axial rotation but axially It is dynamic.

With continued reference to Fig. 4, under a concrete application scene of the above-mentioned technical solutions of this embodiment, the connection of camshaft 20 Portion 200 is specially the spindle nose of camshaft 20, and spindle nose circle distribution (only illustrates two just like three helical tooths shown in Fig. 4 in Fig. 4 A helical tooth), the helical tooth opposite with the helical tooth hand of spiral on camshaft 20 is also arranged in drive shaft 21.In sliding sleeve 22 with The helicla flute that helical tooth coordinates on camshaft 20, spiral angle and the hand of spiral are identical with helical tooth on camshaft 20；Sliding sleeve The helicla flute coordinated in 22 with helical tooth in drive shaft 21, spiral angle and the hand of spiral and helical tooth phase in drive shaft 21 Together.

Since under above application scene, the helical tooth of camshaft 20 and the helical tooth direction of drive shaft 21 are on the contrary, sliding sleeve 22 Two groups of helicla flute hands of spiral also on the contrary, with reference to Fig. 5, in 22 inside of sliding sleeve, two neighboring helicla flute is and camshaft respectively The helicla flute 220 of 20 helical tooth cooperation and the helicla flute 221 with the helical tooth cooperation of drive shaft 21 are above-mentioned adjacent Two helicla flutes form the voussoir 222 of the triangle in 22 inside of sliding sleeve in the recess of 22 inside of sliding sleeve.Based on above-mentioned, two-by-two Adjacent helicla flute then constitutes the voussoir (voussoir 222 and voussoir 223 are only illustrated in Fig. 5) of 6 triangles in Fig. 5, In, the voussoir of two neighboring triangle is reversed end to end, for example, the triangle projective planum head that voussoir 222 and voussoir 223 are formed in Fig. 5 Tail is reversed.

When sliding sleeve 22, which is electrically driven, to be axially moveable, the voussoir two sides of above-mentioned triangle will push respectively to be contacted 21 helical tooth of 20 helical tooth of camshaft and drive shaft, make the circumferential direction between two groups of helical tooths in composition voussoir helicla flute slideway Spacing changes, and the helical tooth of camshaft 20 and the helical tooth of drive shaft 21 is driven to relatively rotate around axis, so as to change The phase angle of 20 relative drive shaft 21 of camshaft.Fig. 6 to Fig. 8 illustrates above-mentioned 22 axial displacement of sliding sleeve to be changed into cam 20 relative drive shaft 21 of axis generates the process of phase angle.

In the present embodiment, sliding sleeve 22 can be selected appropriate steel and be process or be process using powder metallurgically manufacturing. Sliding sleeve 22 is by forming the voussoir drive cam shaft 20 of positive and negative two groups of triangles and the helical tooth of drive shaft 21 between adjacent grooves. The field of conjugate action of helicla flute can do Surface hardening treatment as needed, increase wear-resisting property.

It should be noted that：

The camshaft helical tooth and helicla flute of camshaft helical tooth corresponding matching, drive shaft helical tooth and drive shaft spiral The helicla flute of tooth corresponding matching can also design acquisition in the following way, make its fit form more accurate：

First helicla flute of design and camshaft helical tooth corresponding matching first has the first section, camshaft helical tooth tool There is the first sliding surface coordinated with first helicla flute；

Described and camshaft helical tooth corresponding matching the first helicla flute is the first kernel of section axis rotation and edge What axial movement was formed, first section is perpendicular to central axis；

Similar, then there is the second section, drive shaft helical tooth with the second helicla flute of drive shaft helical tooth corresponding matching With the second sliding surface coordinated with second helicla flute；Described and drive shaft helical tooth corresponding matching the second helicla flute is institute It states the second section to rotate around central axis and be axially moveable what is formed, second section is perpendicular to central axis；

It should avoid interlocking when designing first helicla flute and the second helicla flute in spiral rotating, first helicla flute Spiral rotating direction and second helicla flute spiral rotating direction on the contrary, between the spiral angle of the two have helical angle Degree is poor.

The number of camshaft helical tooth and drive shaft helical tooth is not particularly limited to, and sets the number of above-mentioned helical tooth Respectively greater than or equal to 2 it is preferred.

It is corresponding with camshaft helical tooth to match when the number of above-mentioned camshaft helical tooth and drive shaft helical tooth has multiple It is arranged in parallel between the helicla flute of conjunction, is arranged in parallel between the helicla flute of drive shaft helical tooth corresponding matching.

In addition, it is emphasized that since camshaft drives the opening and closing of engine valve in rotation by cam, Therefore the angle that the distance of above-mentioned first helicla flute and the second helicla flute in the axial direction rotate with it around the axial screw in than Example relationship, when the sliding sleeve of the present embodiment is electrically driven and generates axial displacement, then camshaft helical tooth is in corresponding helicla flute The displacement is slided, camshaft generates first rotation angle proportional to the displacement, and similar, drive shaft helical tooth exists The displacement is slided in corresponding helicla flute, drive shaft results from the second proportional rotation angle of the displacement.Due to second Rotation angle and the first rotation angle are reversed, then the angle of practical camshaft rotation is third rotation angle, third rotation angle For the sum of the first rotation angle and the second rotation angle.

For example, the distance of first helicla flute and the second helicla flute in the axial direction is 20 millimeters, and the first helicla flute Maximum angle around axial screw rotation is 20 degree, and the second helicla flute is anti-around the maximum angle that the axial screw rotates To 20 degree, then, when applicable sliding sleeve be electrically driven generate axial displacement be 10 millimeters, then first rotation angle be 10 degree, the second rotation angle is reversed 10 degree, and the third spiral angle is 20 degree.

Embodiment two

The present embodiment expands the camshaft structure in embodiment one and more specifically illustrates.

With reference to figure 9, camshaft is made of hollow axis pole 30 and spindle nose 31 and cam 3.Wherein, the hollow axis pole 30 can To be considered camshaft ontology in embodiment one, the spindle nose 31 is then the connecting portion of camshaft in embodiment one.

Cam 3 (part) is pressed with by interference fit on 30 one end outer diameter of hollow axis pole, the other end passes through interference fit Spindle nose 31 is pressed with, helical tooth 32,33 and 34 is uniformly distributed on the excircle of spindle nose 31.In other embodiments, helical tooth Quantity can also be designed as 1 to 4 tooth according to the size of the phase of adjusting and the intensity requirement of tooth, and the spiral angle of helical tooth is according to tune Movably distance, the application Vidacare corp outside or inside are used for sliding sleeve described in electric drive for the phase size of section, sliding sleeve Motor torque and each component of Vidacare corp connection frictional force comprehensive condition and determine.

31 outer diameter of spindle nose coordinates with sliding sleeve internal diameter, and spindle nose 31 can be as the sliding axle of the sliding sleeve.Spindle nose 31, which can be selected, to be closed Suitable steel are process or are formed using powder metallurgically manufacturing, and the helical tooth field of conjugate action can do Surface hardening treatment as needed, Increase wear-resisting property.

The camshaft of the present embodiment uses hollow axis pole, on the one hand can mitigate camshaft weight；On the other hand, hollow shaft There is hollow hole 35 on bar 30, the connecting portion that can correspond to design drive has the axle journal goed deep into hollow axis pole hollow hole, The hollow hole 35 of hollow axis pole 30 can play the role of supporting drive shaft during assembling.In addition, hollow hole 35 is additionally operable to exclude profit Lubricating oil after cunning.

Embodiment three

The present embodiment expands the driving axle construction in embodiment one and more specifically illustrates.

With reference to figure 10, drive shaft 40 is process by rod iron, and drive shaft 40 is interior with being designed in the mating surface of driving wheel 41 Threaded hole, bolt 42 are fixed driving wheel 41 on the driving shaft by this internal thread hole.

Thrust ring 400 is designed in drive shaft 40, which is caught in cylinder cap camshaft holder and (is not shown in figure, drives Wheel 41 is equipped with the accommodating chambers for accommodating the cylinder cap camshaft holder) annular groove in, drive shaft 6 to be prevented to be axially moveable.Cylinder cap is convex Oil leab is disposed in the annular groove of axle block, excessive wear caused by when can be run to avoid 40 thrust ring 400 of drive shaft.

Figure 11 and Figure 12 is the structure diagram and sectional view in an axial direction of drive shaft 40 respectively, wherein, Figure 12 also illustrates The internal thread hole 401.

With reference to Figure 11 and Figure 12, it is known that：

The drive shaft 40 of the present embodiment is axially distributed a multiple oilholes (403,403a) and oil groove (402), oilhole, The annular groove oil leab of oil groove and cylinder cap camshaft holder connects.Drive shaft 40 has the faying face 404 of contact camshaft, oilhole (402) on the faying face 404, lubricating oil is by oilhole and oil-bath lubrication faying face 404, also, due to drive shaft 40 Faying face 404 belong to the component part of drive shaft connecting portion, contacted in assembling with sliding sleeve part, therefore can will part lubrication Oil is radially thrown on sliding sleeve inner wall, so as to lubricate inner sliding sleeve, the mating surface of camshaft and drive shaft 40 and camshaft and drive The field of conjugate action on the helical tooth and sliding sleeve of both moving axis between helicla flute.

In the present embodiment, outer circle is evenly distributed with quantity identical with camshaft helical tooth in embodiment two in drive shaft 40 Helical tooth (405a, 405b, 405c), distribution mode is similar to camshaft helical tooth, and the hand of spiral of drive shaft helical tooth The helical tooth hand of spiral with camshaft in embodiment two is on the contrary, the spiral angle of drive shaft helical tooth can be arbitrary.Helical tooth The field of conjugate action can do Surface hardening treatment as needed, increase wear-resisting property.

With continued reference to Figure 11 and Figure 12, drive shaft 40 is also devised with and the hollow hole of two camshaft of embodiment matched One axle journal 406, the third axle journal 408 coordinated with the second mating axle journal 407 of sliding sleeve inner ring and with driving wheel 41.Drive shaft 40 helical tooth is set on the circumference of the second axle journal 407.

It should be noted that：

Helical tooth number and the helical tooth number of camshaft of drive shaft can be different, can also be identical；

The hand of spiral can be designed with the hand of spiral of the helicla flute of helical tooth corresponding matching and be realized, and helical tooth is only It is the cooperating teeth for coordinating slip in the helicla flute with the hand of spiral.

Example IV

The present embodiment is based on any of the above embodiment, and how specifically describe electric drive sliding sleeve and makes this slide over axial shifting It is dynamic.

With reference to figure 13, a kind of Vidacare corp for variable valve timing system is present embodiments provided, including： Camshaft 50, drive shaft 51 and sliding sleeve 52 as described in any one embodiment in embodiment one to embodiment three；It further includes：Electricity Unit 53 and sliding sleeve 54.In order to distinguish the two of the present embodiment kinds of sliding sleeves, hereinafter referred to as sliding sleeve 52 is inner sliding sleeve, and sliding sleeve 54 is referred to as outer cunning Set, inner sliding sleeve 52 is socketed in outer sliding sleeve 54, and in the axial direction with 54 associated movement of outer sliding sleeve.

The Vidacare corp of the present embodiment is from translator group, for driving inner sliding sleeve 52 axially movable.

The matching relationship, outer sliding sleeve 54 and the cooperation of motor group 53 of the specifically used inner sliding sleeve 52 of the present embodiment and outer sliding sleeve 54 Relationship, driving inner sliding sleeve 52 move axially：

With continued reference to Figure 13, motor group 53 includes：Motor driving shaft 530 and motor 531, motor driving shaft 530 and motor 531 can connect fixation, motor driving shaft 530 and motor 531 by motor mount 532 is set on motor mount in assembling In 532.

Motor group 53 after assembling can refer to Figure 14, and the both ends of motor driving shaft 530 are respectively arranged with sliding sleeve driving Gear 533 and motor-driven gear 534, wherein, (in Figure 14, motor is assemblied in motor to motor-driven gear 534 with motor 531 In mounting base 532, therefore be not shown) motor gear 535 engage.Motor-driven gear 534 is reduction gearing, is driven for improving The torque of axis, and reduce rotating speed.The gear size of motor-driven gear 534 is more than the driving dimensions of sliding sleeve drive gear 533.

It should be noted that in the present embodiment, motor 531 can be a low-power machine, use motor driving shaft 530 and the torque matching relationship of motor-driven gear 534, pass to the convenient driving force of sliding sleeve drive gear 533.At other In embodiment, motor group can also only include the motor of relatively high power, by the motor gear on the motor directly and sliding sleeve Drive gear cooperation transmission；The motor can be a kind of speed reducer.

With reference to Figure 15, Figure 15 is the fiting relation figure of outer sliding sleeve 54 (part) and motor group 53 (part), outside outer sliding sleeve 54 Wall is arranged with sliding sleeve sliding tooth 540, and the orientation of sliding sleeve sliding tooth 540 is consistent with axial direction, sliding sleeve drive gear 533 with Sliding sleeve sliding tooth 540 engages, for outer sliding sleeve 54 to be driven to move axially.It is rotated in 531 driving motor tooth 535 of motor, motor drives Moving axis 530 rotates, and by the cooperation of sliding sleeve drive gear 533 and sliding sleeve sliding tooth 540, motor group drives outer sliding sleeve 54 in axial direction Mobile, the axial movement of outer sliding sleeve 54 drives inner sliding sleeve 52 to move axially.

With continued reference to Figure 14, and with reference to Figure 15, drive shaft can be process by rod iron, (can be subtracted in motor-driven gear 534 Fast gear) on design lightening hole, so as to reduce shafting rotary inertia and save material.Powder can be used in motor-driven gear 534 Metallurgy manufacture, to reduce gear cost.

Motor 531 can be dc motor or stepper motor, can quickly be rotated and reverse according to control needs, realization.Electricity Machine drive shaft 530 and motor 531 are all mounted in motor mount 532, and motor mount 532 can be aluminum die casting.

In the design of the present embodiment, outer sliding sleeve 54 is opposing stationary or allow to have relatively low rotary speed around the axis, interior Sliding sleeve 52 is socketed in outer sliding sleeve 54 and has synchronous axial movement with outer sliding sleeve 54.Outer sliding sleeve 54 and inner sliding sleeve 52 are all circle Ring-like, the outer diameter of inner sliding sleeve 52 is adapted to the internal diameter of outer sliding sleeve 54.

In implementation process, the orientation of sliding sleeve sliding tooth 540 is consistent with axial direction, with reference to shown in Figure 16 Two kinds of 540 set-up modes of sliding sleeve sliding tooth, arrow direction are axial direction, and sliding sleeve sliding tooth 540 can surround outer sliding sleeve 54 Annular tooth (in Figure 15 around outer sliding sleeve 54 be annular tooth), it is opposite that sliding sleeve sliding tooth 540 can also be distributed across outer sliding sleeve 54 The arc-shaped gear (structure be pivoted outer sliding sleeve be prohibited) of 53 side of motor group.

A kind of installation diagram of the present embodiment can refer to Figure 17, and the Vidacare corp, cylinder of the present embodiment are illustrated in figure Lid 55, cylinder cap camshaft holder 56, driving wheel 57 and cylinder cap camshaft holder annular groove 58.Cylinder cap camshaft holder 56 and driving wheel 57 with The connection relation of the Vidacare corp of the present embodiment can refer to embodiment three.

In mounting structure shown in Figure 17, valve chamber cover is not shown, and valve cover, which covers, need to be designed with to install The mounting plane of motor group 53.During installation on mounting plane gluing or encryption packing, prevent oil leak.Valve cover, which covers, also to be needed The mounting hole of motor driving shaft 530 is designed with, which can realize 530 both ends of motor driving shaft and support that the depth in hole can be controlled The axial float of motor driving shaft 530 processed, the position in hole is according to 54 annular tooth of outer sliding sleeve or pitch circle, the motor driving shaft of arc-shaped gear The initial position of 530 sliding sleeve drive gear pitch circles and outer sliding sleeve 54 and determine.

The operation principle of the present embodiment can refer to as follows：

Motor group 53 drives outer sliding sleeve 54 to be axially moveable, and outer sliding sleeve 54 can move jointly in an axial direction with inner sliding sleeve 52, because This outer sliding sleeve 54 can drive inner sliding sleeve 52 to be axially moveable when moving axially, and when inner sliding sleeve 52 is around axial rotation, outer sliding sleeve 54 can The slip around axis occurs with opposite inner sliding sleeve 52.

It, only can be around axial direction since the axial direction of camshaft 50 and drive shaft 51 is fixed after inner sliding sleeve 52 is electrically driven Rotation, it is impossible to move axially；

Reference implementation example one, 50 spindle nose of camshaft are disposed with helical tooth, reverse acting spiral tooth are equally disposed in drive shaft 51. The two groups of spiral shells to cooperate respectively with 50 helical tooth of camshaft and 51 helical tooth of drive shaft are evenly distributed on 52 inner wall of inner sliding sleeve Spin slot, the spiral angle and the hand of spiral of helicla flute are identical with the helical tooth of camshaft 50 and the helical tooth of drive shaft 51；

The helical tooth of camshaft 50 and the helical tooth direction of drive shaft 51 are on the contrary, two groups of helicla flute spiral sides of inner sliding sleeve 52 To also on the contrary, therefore formation triangle voussoir, adjacent triangle voussoir direction are inverted between two neighboring helicla flute；

When inner sliding sleeve 52 is electrically driven and is slid axially, 52 triangle voussoir two sides of inner sliding sleeve will push and connect therewith Tactile helical tooth makes the circumferential spacing between 51 helical tooth of camshaft helical tooth 50 and drive shaft of helicla flute change, band The helical tooth of moving cam axis 50 and the helical tooth of drive shaft 51 relatively rotate around axial, and so as to change, camshaft 50 is opposite to be driven The phase angle of moving axis 51.

The other content of the present embodiment can refer to embodiment one to any one embodiment of embodiment three.

Embodiment five

The present embodiment is based on example IV.

The outer sliding sleeve structure of the present embodiment Vidacare corp is as shown in figure 18, and thick walled steel tube processing can be used in outer sliding sleeve 60 It forms, outer sliding sleeve 60 is cylindrical shape, and periphery is arranged evenly ring tooth 61.It, can be along axis under the gear driving of motor group To movement.

There is thrust surface 62 in the circle of 60 side of outer sliding sleeve, jump-ring slot 63 is designed in opposite side circle.The electronic drive of the present embodiment Dynamic device further includes：Clamp spring (not shown).

After inner sliding sleeve socket enters outer sliding sleeve 60, jump-ring slot 63 is caught in using clamp spring, is locked inner sliding sleeve by clamp spring In outer sliding sleeve 60, such outer sliding sleeve 60 can only move jointly with inner sliding sleeve in the axial direction, and can be with interior cunning in around direction Opposite slide occurs for set.

When being axially moveable under driving of the outer sliding sleeve 60 in motor group, also inner sliding sleeve is driven to be axially moveable.And interior cunning Outer sliding sleeve 60 cannot then be driven to be rotated with larger speed during set rotation, the ring tooth of outer sliding sleeve is avoided to be driven with the sliding sleeve of motor group Larger sliding friction is generated between moving gear, to reduce the abrasion of gear engagement.

Control outer sliding sleeve and inner sliding sleeve movement can be correspondingly arranged in the design of the present embodiment, on camshaft or drive shaft The thrust area of distance, the thrust surface 62 is the protrusion on outer sliding sleeve inner ring wall, and thrust area is in camshaft or driving Concave region on axis on outer ring, thrust surface 62 are maintained in assembling in the thrust area, then can limit above-mentioned slide over Displacement distance in axial direction.Limiting is that do not have the region of annular groove tooth by outer sliding sleeve both ends, and without ring tooth place, motor driving arrives this Terminate.(reference can be made to Figure 18 partial enlarged views, one section of head is no annular groove)

The Vidacare corp of the present embodiment also has clamp spring 64, and as shown in figure 19, clamp spring 64 is section is round or rectangle Annular resilient part (being illustrated as circular cross-section), locally have opening 65, material is spring steel.It will be open at 65 with pliers during assembling Closure is pinched, reduces 64 diameter of clamp spring, pliers is unclamped after being put into the jump-ring slot of outer sliding sleeve 64, clamp spring 64 is successfully embedded in outer sliding sleeve In 60 jump-ring slot.Clamp spring 64 is socketed in outer sliding sleeve internal diameter jump-ring slot and stops inner sliding sleeve end face after assembling, makes interior Sliding sleeve in the axial direction with outer sliding sleeve associated movement.

Certainly, in other embodiments, the axial movement of inner sliding sleeve and outer sliding sleeve can not also be fixed using clamp spring：It can By outer sliding sleeve 60 enclose in jump-ring slot be designed as card slot, and the ring of the corresponding setting on the outer wall of inner sliding sleeve and card slot cooperation Shape protrusion.

The driving mechanism of corresponding the present embodiment can also correspond to the setting on inner sliding sleeve and run through between the inside and outside wall of inner sliding sleeve Oilhole, oilhole makes to communicate between the inside and outside wall of inner sliding sleeve, and pass through oilhole deliver lubricating oil to outside it On the internal face of the outer sliding sleeve 60 of wall cooperation, for lubricating contact surface between the two.

In addition, above-mentioned oilhole can also alleviate the quality of inner sliding sleeve, reduce inertia force during its quick sliding, full Under the premise of sufficient inner sliding sleeve structural strength, making material can be saved.

Embodiment six

Present embodiment discloses the connection mode between a kind of camshaft and drive shaft, based on embodiment five.The present embodiment Above-mentioned connection mode may be equally applied to embodiment one to example IV.

As shown in figure 20, it is a kind of Vidacare corp for variable valve timing system provided in this embodiment, Including：Camshaft 70, drive shaft 71, inner sliding sleeve 72, motor group 73, outer sliding sleeve 74, clamp spring 75 and torsional spring 76, drive shaft 71 pass through Bolt 77 connects driving wheel 78.

Camshaft 70 has hollow hole (with reference to the hollow hole 35 of figure 9), and the axle journal of drive shaft 71 is (with reference to figure 11 and Figure 12 Axle journal 406) outer diameter is adapted to the aperture of the hollow hole, go deep into the hollow hole in assembling so that the camshaft 70 is with driving Moving axis 71 is connected；

In addition to this, the present embodiment is also reduced using torsional spring 76 using camshaft 70 during the Vidacare corp and driving The helical tooth of axis 71 and the pressure of the 72 helicla flute field of conjugate action of inner sliding sleeve：

Camshaft 70, drive shaft 71 and torsional spring 76 with reference to shown in Figure 21.

Camshaft 70 includes：Hollow axis pole 700 and spindle nose 701 have axial hollow hole 702, spindle nose on hollow axis pole 700 701 be the camshaft connecting portion, and spindle nose 701 is circular ring type, and endoporus connects with hollow hole 702 and for being accommodated in assembling Torsional spring 76, the outer diameter of spindle nose 701 are adapted to the internal diameter of inner sliding sleeve 72.The internal diameter of spindle nose 701 is more than the internal diameter of hollow hole 702, therefore Hollow axis pole 700 and the coupling part of spindle nose 701 are formed perpendicular to the first anchor ring (diagonal line hatches portion in Figure 21 of axial direction Point).

Drive shaft 71 includes：702 matched first axle journal 710 of hollow hole and sliding sleeve inner ring grafting with camshaft 70 The axle journal 713 connected between second axle journal 711 of cooperation and the first axle journal 710 and two axle journals 711.Wherein, the second axle journal 711 diameter of axle is adapted to the internal diameter of inner sliding sleeve 72, and the axle journal of axle journal 713 is adapted to the assembling internal diameter of torsional spring 76.First axle journal 710 The diameter of axle be less than axle journal 713, the diameter of axle of axle journal 713 is less than the second axle journal 711, the first axle journal 710, the second axle journal 711 and axle journal 713 connections form the connecting portion of drive shaft 71, and axle journal 713 connect formation with the second axle journal 711 perpendicular to the second of axial direction Anchor ring (the point dash area in Figure 21).

First anchor ring has the mounting hole 703 of fixed 76 one end 760 of torsional spring, and the second anchor ring has 76 other end of fixed torsional spring 761 mounting hole 712.

With reference to the installation diagram of Figure 22, in assembling, axle journal 713 is inserted in torsional spring 76, and mounting hole is inserted at the end 761 of torsional spring 76 712 fix.First axle journal 710 stretches into hollow hole 702, and the end 760 of torsional spring 76 is inserted into mounting hole 703 and is fixed.The endoporus of spindle nose 701 The chamber 79 for accommodating torsional spring 76 is formed with 713 outer ring of axle journal.

In the present embodiment, the torque of torsional spring 76 is determined according to the load of camshaft 70, can be reduced inner sliding sleeve 72 and be slided Frictional resistance, and then reduce the torque of motor group 73, to reduce the power consumption of motor group 73.To make inner sliding sleeve 72 convex in adjusting Stress is more steady when wheel shaft 70 and the relative phase of drive shaft 71, and for torsional spring 76 in torsion, the torque needs of generation are more steady, therefore 76 torsion stiffness of torsional spring is as small as possible in chamber 79 during operation.

Embodiment seven

Present embodiments provide a kind of specific embodiment in relation to driving wheel.

Figure 23 is the structure diagram of 80 front of driving wheel and reverse side, and the concrete structure of driving wheel 80 is：

Driving wheel 80 is powder metallurgically manufacturing, to reduce cost.

80 teeth portion shape of driving wheel is designed according to sprocket wheel or belt pulley flute profile, to avoid the position opposite engine mistake of the gear teeth Outer (gear teeth are outer, then all gears or belt wheel need outer shifting in timing wheel train, and engine axial length will be caused to increase) is spent, Driving wheel 80 is designed to bowl-type by the present embodiment, so that the gear teeth, close to engine, bowl-type cavity is used to accommodate cylinder cap camshaft holder The bulge quantity (related content of reference implementation example three, example IV and Figure 17) of (first bearing seat).

According to the outer diameter of drive shaft, locating ring 81 is designed on 80 mounting surface of driving wheel, locating ring 81 is used for driving wheel 80 Installation with drive shaft positions.

Driving wheel 80 is also devised with several lightening holes (only illustrating lightening hole 82 in figure), it can be achieved that part lightweight, is reduced Powdered metallurgical material usage amount.

Embodiment eight

Based on any one Vidacare corp in above-described embodiment, a kind of variable valve timing system is present embodiments provided System, including：Vidacare corp and ECU controllers, the ECU controllers are suitable for bent according at least to camshaft phase and engine The electric drive displacement of the above-mentioned sliding sleeve of axis phase controlling (inner sliding sleeve or inner sliding sleeve and outer sliding sleeve).

With reference to shown in Figure 24 is the electric operation control circuit figure of the present embodiment variable valve timing system：Variable valve timing system Control circuit need camshaft phase sensor monitoring feedback cam phase, crank phase sensor detection feedback crank phase (the other positions sensor in Figure 24 is with scalability), ECU controllers are according to the cam phase and bent axle fed back The working condition of motor group in phase controlling Vidacare corp carries out axial displacement, then further with control driving sliding sleeve Relatively rotate camshaft and drive shaft, so as to control valve timing.In fig. 24, dotted line represents that individual control circuit can be into One step is integrated in ECU internal controllers.

Application examples

The application example gives a kind of CAE analysis effect of the Vidacare corp for variable valve timing system.Institute Vidacare corp is stated with the technical characteristic described in embodiment one to embodiment seven, in addition, the application example is started for four cylinders Machine.

It establishes digital-to-analogue and carries out space inspection, although the results show that being moved outside the first camshaft holder of cylinder cap, outer part of moving holds Driving wheel bowl intracavitary is contained in, the length ratio of entire cam shaft system reduces 16mm using hydraulic pressure VVT systems so that engine is tighter It gathers.Outer sliding sleeve occupies cylinder cap and the space of valve chamber cover is extremely limited, under slightly change can just accommodate.

CAE dynamic analysis are carried out to the electric drive VVT systems of the application Vidacare corp, input condition is：

First, the torque of camshaft.

As shown in figure 25, the torque when torque of camshaft refers to certain engine cam 1500rpm is (also that is, sending out Motivation 3000rpm；The torque of camshaft is smaller with the rotation speed change of engine, is represented so the torque for calculating a rotating speed has Property).

2nd, motor group type of drive.

Actuating motor uses direct current generator, and rotational speed regulation is controlled by Figure 26 and Figure 27：

With reference to figure 26, when need to calculate motor maximum speed 2500rpm, complete within 0.2 second from be up to minimum phase adjust and When controlling according to Figure 27 and calculate motor maximum speed 5000rpm, complete within 0.1 second from minimum phase adjusting is up to, even if also Governing speed accelerates 1 times.

3rd, parts density.

During quick adjusting, the part of movement will generate inertia force, if the density of part presses 7.8 × 10-9 tons/mm3 of steel (7.8 Ton/m3).

4th, friction coefficient.

Consider part rotation, slide and will generate frictional force, set confficient of static friction as 0.11, the coefficient of kinetic friction 0.07.

5th, axially movable distance is slided over as 20 millimeters (+10 millimeters to -10 millimeters), and valve adjustable phase is 40 Degree (+20 degree to -20 degree).

Based on above-mentioned input condition, dynamic analysis result is shown：

The response time of electric drive VVT systems based on the Vidacare corp be 0.1 second when (for engine this Response time is subjected to), and the largest of about 32 watts of actuating motor power consumption (rated power of more than 160 kilowatts with respect to the engine, 32 Watt power consumption influences minimum), phase is adjusted as 40 degree (- 20 to+20 spend).Result of calculation is within the acceptable range, specific to tie Fruit and conclusion are as follows：

First, drive shaft thrust ring is as shown in figure 28 to the thrust of cylinder head annular groove, and (i.e. motor is most under general governing speed High rotating speed 2500rpm), it is fluctuated between+225N and -280N；After governing speed accelerates 1 times (i.e. motor maximum speed 5000rpm), As shown in figure 29, drive shaft thrust ring is to thrust being basically unchanged of size of cylinder head annular groove.

Secondly, the change procedure of operating motor torque is as shown in figure 30, under general governing speed, about in+30N.mm With being fluctuated between -30N.mm；Governing speed accelerates 1 times, and as shown in figure 31, operating motor torque maximum is to increase from 30N.mm Greatly to 123N.mm (increasing about 4 times).It can be seen that from above-mentioned change in torque, using the torsion of motor needed for technical solution of the present invention Square is smaller, and general execution motor can reach.

Followed by the situation of change of operating motor power, under general governing speed, operating motor power such as Figure 32 It is shown；After governing speed accelerates 1 times, as shown in figure 33, motor power (output) maximum value is to increase to 32w (increasing about 8 times) from 4w. Power consumption using motor needed for technical solution of the present invention is smaller, and general execution motor can reach.

Then the phase change and regulations speed between camshaft and drive shaft are investigated：The phase of camshaft and drive shaft becomes Change under general governing speed, as shown in figure 34, the range for adjusting phase is all+20 degree to -20 degree, as shown in figure 35, is adjusted After speed accelerates 1 times, regulating cycle was accelerated 0.1 second to Figure 35 from 0.2 second of Figure 34.

The change in displacement of outer sliding sleeve is also investigated：As shown in figure 36, under general governing speed, outer sliding sleeve change in displacement exists It is fluctuated between+10 millimeters to -10 millimeters, governing speed accelerates 1 times, and as shown in figure 37, the movement speed of outer sliding sleeve accelerates 1 times.

Also outer sliding sleeve and motor group drive gear intermolecular forces are investigated：Under general governing speed, such as Figure 38 Shown, the active force between outer sliding sleeve and motor group drive gear fluctuates between+563N to -442N.With reference to figure 39, in governing speed After accelerating 1 times, the maximum force of above-mentioned active force is basically unchanged.

In addition, for axial force suffered by camshaft, under general governing speed, the active force such as Figure 40 institutes Show, fluctuated between+330N to -250N；After governing speed accelerates 1 times, as shown in figure 41, the maximum force of the active force is then It is basically unchanged.

Although the invention has been described by way of example and in terms of the preferred embodiments, but it is not for limiting the present invention, any this field Technical staff without departing from the spirit and scope of the present invention, may be by the methods and technical content of the disclosure above to this hair Bright technical solution makes possible variation and modification, therefore, every content without departing from technical solution of the present invention, and according to the present invention Any simple modifications, equivalents, and modifications made to above example of technical spirit, belong to technical solution of the present invention Protection domain.

Claims (19)

1. a kind of Vidacare corp for variable valve timing system changes inlet valve and the row set within the engine At least one of valve opens or closes timing, which is characterized in that including：Camshaft, the first driving in same axial direction Axis and the first sliding sleeve, the camshaft extend to intracavitary in the first sliding sleeve, with formed can be with described first along the axial forward direction The first connecting portion that sliding sleeve relatively moves in the axial direction, first drive shaft are oppositely extending in the first sliding sleeve along the axial direction Intracavitary, the second connecting portion that can be in the axial direction relatively moved with first sliding sleeve with formation；First sliding sleeve can be driven by electricity It moves to generate axial displacement, and can rotate around the axial direction；

On the first connecting portion outer wall there is the first helical tooth, there is the second helical tooth, institute on the second connecting portion outer wall State the inner wall of the first sliding sleeve have with the first helicla flute of the first helical tooth threaded engagement and with second helical tooth Second helicla flute of threaded engagement；First helicla flute and the second helicla flute are when the hand of spiral is axial with opposite spiral shell Revolve differential seat angle.

2. Vidacare corp as described in claim 1, which is characterized in that further include：Motor group, the motor group are suitable for driving Move first sliding sleeve axially movable.

3. Vidacare corp as claimed in claim 2, which is characterized in that further include：Second sliding sleeve, the first sliding sleeve set It is connected to second sliding sleeve and in the axial direction with the second sliding sleeve associated movement, the second sliding sleeve outer wall is arranged with driving Tooth, the orientation of the sliding tooth are consistent with the axial direction；

The motor group includes：Second drive shaft and motor, the motor have motor gear；The both ends of second drive shaft It is respectively arranged with the first drive gear and the second drive gear, first drive gear and the driving tooth engagement, described the Two drive gears are engaged with the motor gear.

4. Vidacare corp as claimed in claim 3, which is characterized in that second sliding sleeve is around first sliding sleeve axial direction Direction is opposing stationary.

5. Vidacare corp as claimed in claim 3, which is characterized in that first sliding sleeve and the second sliding sleeve are all annulus Type, the sliding tooth are annular tooth.

6. Vidacare corp as claimed in claim 3, which is characterized in that there is ring on the opening inner wall of second sliding sleeve Shape jump-ring slot；

The Vidacare corp further includes：Cyclic annular clamp spring, the ring-type clamp spring are set in assembling in the jump-ring slot, and First sliding sleeve is limited to remove.

7. Vidacare corp as claimed in claim 3, which is characterized in that second drive gear be reduction gearing, institute The size for stating the second drive gear is more than the size of first drive gear.

8. the Vidacare corp as described in claim 3 or 7, which is characterized in that second drive gear is equipped with loss of weight Hole.

9. Vidacare corp as claimed in claim 3, which is characterized in that the motor group further includes：Motor mount, institute It states the second drive shaft and motor is set in the motor mount.

10. Vidacare corp as described in claim 1, which is characterized in that first drive shaft passes through described first to slide To form connection axle journal, the first connecting portion has the axially extending bore with the connection axle journal connection cooperation for set inner cavity.

11. Vidacare corp as claimed in claim 10, which is characterized in that further include：Torsional spring；

The first connecting portion has circular ring type spindle nose, and the outer diameter of the spindle nose is adapted to the internal diameter of the first sliding sleeve inner cavity, The endoporus of the spindle nose connects with the axially extending bore and is suitable for accommodating the torsional spring；The internal diameter of the spindle nose is more than the axial direction The internal diameter of through-hole, the first connecting portion of axially extending bore part connect with spindle nose and form the first anchor ring perpendicular to axial direction；

The diameter of axle of the second connecting portion is adapted to the internal diameter of the first sliding sleeve inner cavity, and the axle journal of the connection axle journal is less than institute State the diameter of axle of second connecting portion, the second connecting portion connects with connecting axle journal and forms the second ring perpendicular to axial direction Face, second anchor ring are opposite with the first anchor ring；

First anchor ring and the second anchor ring are respectively arranged with the mounting hole of the fixed torsion spring end.

12. Vidacare corp as claimed in claim 11, which is characterized in that first helical tooth is set on the spindle nose On.

13. Vidacare corp as described in claim 1, which is characterized in that first helicla flute has the first section, institute Stating the first helical tooth has the first sliding surface coordinated with first helicla flute；First helicla flute be first section around Central axis rotates and axially simultaneously moves what is formed, and first section is perpendicular to central axis；

Second helicla flute has the second section, and second helical tooth has coordinate with second helicla flute second to slide Face；Second helicla flute is that second section rotates around central axis and axially simultaneously moves to be formed, described second Section is perpendicular to central axis；

First helicla flute and the second helicla flute avoid interlocking in spiral rotating, the spiral rotating side of first helicla flute To opposite with the spiral rotating direction of second helicla flute.

14. the Vidacare corp as described in claim 1 or 13, which is characterized in that the number of first helical tooth is more than Or equal to 2, the number of second helical tooth is greater than or equal to 2；Each first helical tooth is corresponding with the first helicla flute of adaptation, Each second helical tooth is corresponding with the second helicla flute of adaptation, is arranged in parallel between first helicla flute, second spiral It is arranged in parallel between slot.

15. Vidacare corp as claimed in claim 14, which is characterized in that first helical tooth is with the cam shaft The heart is the center of circle, angularly circumference is arranged in the first connecting portion；Second helical tooth is with the first drive shaft axis The heart is the center of circle, and angularly circumference is arranged in the second connecting portion.

16. Vidacare corp as claimed in claim 13, which is characterized in that first helicla flute and the second helicla flute exist Distance in axial direction with its around the angle that the axial screw rotate in proportionate relationship.

17. Vidacare corp as described in claim 1, which is characterized in that further include：Driving wheel；First drive shaft Suitable for transmitting the torque of the driving wheel；The driving wheel is driven to synchronize rotation by engine crankshaft.

18. Vidacare corp as described in claim 1, which is characterized in that further include：Along the axial direction, through described convex The oil duct of wheel shaft, the first drive shaft and the first sliding sleeve；The camshaft corresponds to the oil duct and forms axially extending bore, and described first drives Moving axis corresponds to the oil duct and forms axial oilhole and oil groove, and first sliding sleeve corresponds to the oil duct and formed through inside and outside wall Oilhole.

19. a kind of variable valve timing system, which is characterized in that including：Such as the electronic drive of claim 1 to 18 any one of them Dynamic device and ECU controllers, the ECU controllers are suitable for according at least to described in camshaft location and engine crankshaft position control The electric drive displacement of first sliding sleeve.