CN207122336U - A kind of VVT drive device - Google Patents

Abstract

The utility model discloses a kind of VVT drive device, drives intake and exhaust cam axle to rotate by engine crankshaft by chain or belt.Camshaft right-hand member is supported in engine body by bearing arrangement.The device can adjust intake and exhaust cam axle phase according to engine real-time working condition, realize valve timing.The utility model makes the engine breathing door opening time realize that the morning of valve opens or evening closes with engine operating condition change, so as to meet the optimal distribution demand under Different Work Condition of Engine.The utility model proposes a kind of discrete type VVT drive device being used cooperatively based on indexing pawl with sliding pawl set, the relative rotation of sliding pawl set and camshaft is realized by the interaction for indexing pawl with sliding pawl covers, so as to realize that the cam phase on camshaft is variable, valve-opening time is set to be in perfect condition all the time.

Description

A kind of VVT drive device

Technical field

The utility model belongs to valve timing apparatus technical field, more particularly to a kind of VVT driving dress Put.

Background technology

The valve opening and closing time of conventional engine valve mechanism are changeless, are not changed with engine operating condition Become, it can only ensure that engine is in a certain range of speeds and most preferably match somebody with somebody gaseity, it is impossible to take into account combustion during low engine speed Dynamic property when oily economy and high speed.

Variable Valve Timing Technique of IC Engine be early opened by changing engine breathing door or evening close it is optimal to realize Valve timing, valve-control is in perfect condition all the time, help to improve the fuel economy of low engine speeds active section With the torque output of big torque active section, fuel economy during engine low load can be ensured, and can ensures that engine is high Power performance during load.VVT also contributes to the instantaneous start and stop of hybrid electric vehicle engine simultaneously Performance.

Utility model content

The utility model has designed and developed a kind of VVT drive device, it is therefore an objective to realizes engine breathing door Early open or evening closes, to meet the optimal distribution demand under Different Work Condition of Engine.

Technical scheme provided by the utility model is：

A kind of VVT drive device, including：

Shell, it is in hollow cylindrical, and the outer guide of multiple protrusions is evenly distributed on the outer casing inner wall；It is described outer One end of guide rail is provided with wedge-shaped working face；

Sleeve, it is in hollow cylindrical and is co-axially located in shell, has been evenly distributed on the sleeve lining more The interior guide rail of individual protrusion；One end of the interior guide rail is provided with wedge-shaped working face；

Outer indexing pawl, it is set in one end outside the sleeve, is provided with and the outer guide phase on the outer indexing pawl The outer guide groove of cooperation, it is described it is outer indexing pawl inner side end on be provided with multiple outer indexing teeth circumferentially arranged；

Outer sliding pawl set, its other end being set in outside the sleeve and the outer sliding pawl set are matched somebody with somebody with sleeve by prismatic pair Close；Multiple sliding pawls of outer wedge shape circumferentially arranged are provided with the outer sliding pawl set inner side end；

Camshaft, it is co-axially located in the sleeve；

Interior indexing pawl, it is set between sleeve and camshaft, is provided with the interior indexing pawl and is matched somebody with somebody with the interior guide rail Close interior guide groove, it is described it is interior indexing pawl inner side end on be provided with multiple interior indexing teeth circumferentially arranged；

Interior sliding pawl set, it is set between sleeve and camshaft and the interior sliding pawl set is matched somebody with somebody with camshaft by prismatic pair Close；Multiple sliding pawls of interior wedge shape circumferentially arranged are provided with the interior sliding pawl set inner side end；

Wherein, the wedge-shaped working face of the outer indexing tooth and outer guide is engaged with the sliding pawl of outer wedge shape, makes outer indexing pawl A cycle is moved back and forth along axis, the outer sliding pawl set can be driven to rotate to an angle；The interior indexing tooth and interior guide rail Wedge-shaped working face be engaged with the interior sliding pawl of wedge shape, interior indexing pawl is moved back and forth a cycle along axis, institute can be driven Interior sliding pawl set is stated to rotate to an angle；The outer sliding pawl set is opposite with interior sliding pawl set direction of rotation.

Preferably, the both ends of the surface of the shell are in open type, and the left and right ends of the shell are dismountable respectively to be set There are left end cap and right end cap.

Preferably, one end of the shell is fixed with timing sprocket, and it makes engine bent by coordinating with timing chain Axle can drive shell to rotate.

Preferably, one end of the shell is fixed with timing belt pulley, and it makes engine bent by coordinating with Timing Belt Axle can drive shell to rotate.

Preferably, the outer sliding pawl set end face outside is provided with external spiral spring, the end face outside of the outer indexing pawl It is connected with the first oil pocket.

Preferably, the end face outside of the interior sliding pawl set is provided with inside spin spring, the outboard end of the interior sliding pawl set Face is connected with the second oil pocket, and the end face outside of the interior indexing pawl is connected with the 3rd oil pocket.

Preferably, support ring is provided with the camshaft, back-up ring, the support ring and gear are provided with the shell Circle coordinates, so that camshaft can be supported in shell.

Preferably, it is provided with sealing gasket on the inside of the support ring.

Preferably, the first fuel feed hole, the second fuel feed hole and three fuel feed holes are entered on the camshaft, first oil-feed Hole, the second fuel feed hole and enter three fuel feed holes and connected respectively with the first oil pocket, the second oil pocket and the 3rd oil pocket.

Preferably, first fuel feed hole is connected by flexible pipe with the first oil pocket, second fuel feed hole and is entered three and is entered Oilhole is connected by the oil duct being arranged in camshaft with the second oil pocket and the 3rd oil pocket respectively.

The beneficial effect of VVT drive device described in the utility model is：It is provided by the utility model variable Valve timing drive device can the VVT convenient for assembly that inlet and exhaust valve is realized in engine breathing camshaft one end, The fuel consumption and power output of conventional fuel oil engine can not only effectively be improved, moreover it is possible to optimize hybrid electric vehicle engine Start and stop rotating speed control, improve instantaneous starting rotating speed of hybrid electric vehicle engine etc..What therefore the utility model designed can Air valve variation timing drive device, before having important practical significance and application to orthodox car and automobile engine using new energy resources control Scape.

Brief description of the drawings

Fig. 1 is VVT driving device structure figure.

Fig. 2 is the outer-cavity structure figure of VVT drive device.

Fig. 3 is the inner-cavity structure figure of VVT drive device.

Fig. 4 is VVT driving device structure sectional view.

Fig. 5 is that the outer indexing pawl of VVT drive device slides extreme position schematic diagram.

Fig. 6 is the left end cap structure chart of VVT drive device.

Fig. 7 is the camshaft structure figure of VVT drive device.

Fig. 8 is the shell and chain sprocket structure figure of VVT drive device.

Fig. 9 is the outer sliding pawl noose composition of VVT drive device.

Figure 10 is the tube-in-tube structure figure of VVT drive device.

Figure 11 is the interior sliding pawl noose composition of VVT drive device.

Figure 12 is the outer indexing pawl structure chart of VVT drive device.

Figure 13 is the interior indexing pawl structure chart of VVT drive device.

Figure 14 is the valve displacement change timing curve map that variable valve timing apparatus is realized.

Embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to explanation Book word can be implemented according to this.

As Figure 1-4, the utility model provides a kind of VVT drive device, specifically includes：Intake and exhaust Camshaft 111, timing sprocket 112, the camshaft shaft shoulder 113, oilhole 114, shell 115, right end cap 116, left end cap 117, flexible pipe 118, sleeve 119, outer indexing pawl 120, outer guide 121, outer sliding pawl set 122, external spiral spring 123, sealing gasket 124, support ring 125, jump ring 126, inside spin spring 127, interior sliding pawl set 128, interior guide rail 129, interior indexing pawl 130, oil duct 301, oil pocket 302, Oil pocket 303, oil duct 304, oil pocket 305, oil duct 306, boss 401, the shaft shoulder 402, the shaft shoulder 403, projection 501, slideway 502, projection 601, guide groove 602.

VVT driving device structure figure by chain timing sprocket 112 as shown in figure 1, be engaged, by starting Machine crankshaft drives intake and exhaust cam axle 111 to rotate, and its rotation direction is as shown in the direction of arrow in Fig. 1.The right-hand member of camshaft 111 passes through Bearing arrangement is supported in engine body.The device can adjust the phase of intake and exhaust cam axle 111 according to engine real-time working condition, Realize valve timing.The chain can use belt and timing belt pulley with timing sprocket 112.

As Figure 1 and Figure 4, VVT drive device includes advance/retard mechanism shell 115, right end cap 116, left end Lid 117 and camshaft 111, and sleeve 119 in Fig. 2, outer indexing pawl 120 and outer sliding pawl cover sealing gasket 124 in 122, Fig. 3, Support ring 125, interior sliding pawl set 128 and interior indexing pawl 130, and its oil pocket 302, oil pocket 303, the oil pocket that each parts of Fig. 4 are formed 305。

Timing sprocket 112 in VVT drive device is fixed on the right-hand member of shell 115.Wherein in shell 115 Equally distributed outer guide 121 is provided with wall, as shown in figure 8, shown in the shape of outer guide 121 and position and Fig. 2 Outer indexing pawl 120 and guide groove 602 on outer sliding pawl set 122 and wedge surface shape match.As shown in figure 9, sliding pawl covers 122 outside On single wedge surface circular arc width could be arranged to 10 degree or 15 degree and circumferentially etc. radian is uniformly distributed, outer sliding pawl set 122 is logical Cross on inwall circumference the projection 501 being evenly arranged to match with the slideway 502 on the outer wall of sleeve 119, and outer sliding pawl set 122 can be Slid axially on the outer wall of sleeve 119 along slideway 502, by the limited support of external spiral spring 123 when being slided to right-hand member.Therefore sleeve 119 cover 122 synchronous axial systems with outer sliding pawl all the time when circumferencial direction rotates.

The outer guide 121 that outer indexing pawl 120 and outer sliding pawl are covered on 122, and its inwall of shell 115 is assembled in outside sleeve 119 Position relationship on wall is as shown in Figures 2 and 4.Sleeve 119 is the shaft shoulder on boss 401 and camshaft 111 by left end cap 117 402 are supported on camshaft 111.Left end cap 117 is fixed on the left end of shell 115 by bolt arrangement and completed to sleeve 119 Left end support and sealing, and the inner ring of boss 401 on left end cap 117 is completed to cam by bearing and ring structure The left end support of axle 111 and sealing.Outer indexing pawl 120 forms one with left end cap 117 and its shell 115 and the outer wall of sleeve 119 The annular oil cavity 302 of sealing, wherein being sealed between sleeve 119 and the outer indexing left end of pawl 120 and shell 115 using sealing ring. Fluid in oil pocket 302 feeds what is completed by oil duct 301, and its inner fluid of oil pocket 302 is to control oil storage to set by Engine ECU Available oil is adjusted.

Right end cap 116 is fixed on the right-hand member of shell 115, and the shaft shoulder of right end cap 116 and camshaft 111 by bolt arrangement Supported between 403 using bearing arrangement, to ensure the relative rotation of shell 115 and camshaft 111.In the inner ring right-hand member of shell 115 Completed with the correspondence position of the shaft shoulder 402 of camshaft 111 by installing sealing gasket 124 and support ring 125 to the right-hand member of sleeve 119 Sealing and sealing and support to the inner ring right-hand member of shell 115.Sealing gasket 124 and support ring 125 are fixed on cam by jump ring 126 On axle 111, and the two can realize relative to shell 115 with camshaft 111 and rotate.Outer sliding pawl set 122 and sealing gasket 124 and support Supported between ring 125 by external spiral spring 123, when apparatus structure is installed, external spiral spring 123 presets certain preload, And the pretightning force of its initial position keeps poised state with the inner fluid pressure of left side oil pocket 302.

As shown in Figure 10, equally distributed interior guide rail 129, the shape and cloth of interior guide rail 129 are provided with the inwall of sleeve 119 Seated position matches with the guide groove 603 on the interior sliding pawl set 128 and interior indexing pawl 130 shown in Fig. 3 and wedge surface shape.Such as figure Shown in 11, the wedge surface width of interior sliding pawl set 128 circumferentially waits radian to be uniformly distributed, and wedge surface width and the interior width phase of guide rail 129 Add (10 degree or 15 degree) consistent with the lozenges width on outer sliding pawl set 122, to ensure the drive device relative direction angle of rotation Degree is consistent.Interior sliding pawl covers 128 shape of projection 601 and the slideway phase of the left end of camshaft 111 by being evenly arranged on inwall circumference It coincide, interior sliding pawl set 128 is slid axially on camshaft along slideway, limited when being slided to left end by inside spin spring 127 Position support.Therefore sliding pawl set 128 is synchronous with camshaft 111 all the time when circumferencial direction rotates in.

Interior guide rail 129 and interior sliding pawl set 128 and initial positional relationship such as Fig. 3 of interior indexing pawl 130 on the inwall of sleeve 119 Shown in 4.In camshaft right-hand member, the shaft shoulder 402 and the inwall of sleeve 119 and interior indexing pawl 130 of camshaft 111 form a sealing Annular oil cavity 305, and index between the right-hand member of pawl 130 and sleeve 119 and sealed using sealing ring inside, the fluid in oil pocket 305 Completed by the supply of oil duct 306, its inner fluid of oil pocket 305 is to control oil-stocking equipment fuel control by Engine ECU； Camshaft left end, left end cap 117 form the annular oil cavity 303 of a sealing, oil pocket with the inwall of sleeve 119 and interior sliding pawl set 128 Fluid in 303 feeds what is completed by oil duct 304, wherein boss 401 and interior sliding pawl cover 128 left ends and the inwall of sleeve 119 it Between using sealing ring seal.By the limited support of inside spin spring 127 between left end cap 117 and interior sliding pawl set 128, when mounted Inside spin spring 127 presets certain pretightning force, and its pretightning force size coordinates the left and right sides inner fluid pressure of oil pocket 303 and 305 In initial equilibrium conditionses.

The fluid supply hole 114 of oil duct 301,304 and 306 is arranged on the annular groove on the camshaft shaft shoulder 113 Nei such as Fig. 1 Shown, the annular groove on the camshaft shaft shoulder 113 is overlapping with the support position of engine body inner support camshaft 111, ensures The oil-stocking equipment fuel feeding that oil duct 301,304 and 306 connects respectively when being rotated with camshaft 111 is smooth.Oil duct 301,304 and 306 It can first be processed during processing using by the way of through hole, refill unnecessary through hole afterwards, and guarantee does not influence camshaft 111 Dynamic equilibrium when intensity and camshaft 111 rotate, its oil duct design sketch are as shown in Figure 4.Wherein oil duct 301 is soft by rubber Pipe 118 connects what the upper oil hole of camshaft 111 was realized with the insertion of the right-hand member upper oil hole of shell 115, and the setting of flexible pipe 118 can ensure cam The opposite shell 115 of axle 111 does not influence the fluid supply of oil duct 301 when turning over certain angle in the same direction or inversely.

VVT drive device is in direction initial rotation as shown in Figure 1 under timing sprocket 112 drives, shell 115 with the synchronous axial system of sprocket wheel 112, and now each part is in initial installation equilbrium position, three seal oil chambers in the drive device 302nd, 303,305 inner fluid pressure keep poised state with corresponding axial screw initial tension of spring respectively.Therefore in engine During initialization, outer indexing pawl 120 and outer sliding pawl set 122 in the drive device, interior sliding pawl set 128 and interior indexing pawl 130 exist Keep initial position constant on the axial direction of camshaft 111.

Mode of operation during VVT drive device provided by the utility model has two.

Mode of operation one：Oil mass and oil pressure do not change in both sides oil pocket 303 and 305 in holding sleeve 119.

The rotation direction of sprocket wheel 112 shown in reference picture 1, under when outer indexing pawl 120, oil pressure acts in oil pocket 302 to the right When end is mobile, outer indexing pawl 120 can only be slided to the right vertically under the guide effect of outer guide 121, and outer guide 121 is fixed The opposing cam axle axial direction remains stationary on the inwall of shell 115.Outer indexing pawl 120 utilizes the indexing pawl and guide groove of itself The outer sliding pawl set 122 of structure promotion slides to right-hand member, because the guiding of the projection 501 on 122 inwalls of outer guide 121 and outer sliding pawl set is made With, and the outer guide 121 when being rotated by direction as shown on the inwall of shell 115 is formed necessarily with wedge structure on outer sliding pawl set 122 Inertial force, promote the relatively outer indexing pawls 120 of outer sliding pawl set 122 not produce relative rotation.

Due to the guiding and position-limiting action of outer guide 121, when outer indexing pawl 120 is with the increased work of the inner fluid of oil pocket 302 Firmly lower promote is slided when pawl set 122 slides into the right extreme position as shown in figure 5, external spiral spring 123 is compressed to a fixed length Degree.Now the lozenges of the right-hand member lozenges of outer guide 121 and outer sliding pawl set 122 just coincide, and outer guide 121 is in outer helical spring 123 elastic restoring force and shell 115 acts on lower quick sliding by covering 122 wedge shapes with outer sliding pawl with the inertia force of sprocket wheel 112 The crosspoint in face.Quick reduction and its external spiral spring 123 in the case where the inner fluid pressure of oil pocket 302 controls with Engine ECU afterwards Under the effect such as elastic restoring force, outer sliding pawl set 122 is counter to push away outer indexing pawl 120 to left end slip, due to outer guide 121 and outer sliding pawl The lozenges structure of set 122 promotes outer 122 relative outer guide 121 of sliding pawl set to turn over certain circumferential angle in a circumferential direction.Cause Outer guide 121 on the inwall of shell 115 keeps geo-stationary in a circumferential direction with outer indexing pawl 120, i.e., outer sliding pawl covers 122 phases The rotation of opposite direction is produced to the synchronous axial system of shell 115, turning circumference angle is the single lozenges of outer sliding pawl set 122 Corresponding circumference arc.

Outer sliding pawl set 122 is to be limited on sleeve 119 to horizontally slip by the projection 501 on inwall, and in circumferencial direction Synchronous with sleeve 119 all the time during rotation, now sleeve 119 can turn over corresponding circumference arc with 122 opposite shells 115 of outer sliding pawl set Degree.Because both sides oil pocket 303 in sleeve 119 and oil pocket 305 keep relative balance state, camshaft 111 keeps synchronous with sleeve 119 Rotating speed, camshaft 111 turn over corresponding circumference arc, therefore camshaft 111 in the opposite direction with the opposite shell 115 of sleeve 119 Certain corner can be lagged relative to sprocket wheel 112.Now valve timing drive device the rotating backward by therein mechanism Realize delay of the overhead cam of camshaft 111 with respect to the rotational angle of sprocket wheel 112, i.e., so-called valve delay closure or openness, its Charging efficiency is favorably improved, is provided safeguard for the high rotating speed of engine and high power work section.

According to vehicle driving-cycle real-time change, aforesaid operations mistake can be repeated according to vehicle driving demand by Engine ECU Journey, realize that valve is secondary or timing three times, its timing number determine (ginseng by the lozenges width in speed and outer sliding pawl set 122 Examine engine variable-valve timing range ± 30 degree).When the vehicle is stopped, Engine ECU control VVT control dress Put and return to initial rest position.

It is low to middle low speed or in by low speed when speed when mode of operation one gradually increases suitable for vehicle speed of operation The VVT of the corresponding control of Engine ECU when speed changes to high speed or by high speed to high speed.

Mode of operation two：Oil mass and oil pressure in the outside oil pocket 302 of sleeve 119 is kept not change.

Outer indexing pawl 120 shown in reference picture 2 and outer sliding pawl cover 122 present positions, when the inner fluid pressure of oil pocket 302 with When the elastic force of external spiral spring 123 keeps relative balance state, outer indexing pawl 120 and outer sliding pawl set 122 are with outer guide 121 and set With respect to remains stationary state when cylinder 119 rotates.Now by increasing fluid oil mass in oil pocket 303 and oil pressure and reducing oil pocket Fluid oil mass and oil pressure in 303, the inner fluid of oil pocket 305 promote interior indexing pawl 130 to be slided along the axial direction left end of camshaft 111 Move, interior indexing pawl 130 is slided using sliding pawl set 128 in indexing pawl and guide rail the slot structure promotion of itself to left end.Because of interior guide rail 129 and interior sliding pawl cover the guide effects of 128 inwall upper protruding blocks 601, and its inner fluid pressure of the oil pocket of left and right two 303 and 305 is made With change is controlled in real time with Engine ECU, interior indexing pawl 130 is reached specified location sliding pawl interior before and cover 128 relatively interior indexing Pawl 130 will not produce relative rotation.

Due to the guiding and position-limiting action of interior guide rail 129, when interior indexing pawl 130 pushes away under the inner fluid active force of oil pocket 305 When sliding pawl set 128 slides into extreme position to the left in dynamic (position of outer guide 121 in reference picture 5), inside spin spring 127 is compressed To certain length.Now the lozenges of the interior left end lozenges of guide rail 129 and interior sliding pawl set 128 just coincide, and interior guide rail 129 is in oil The inner fluid pressure of chamber 303 and the lower quick sliding of the elastic restoring force of inside spin spring 127 effect with interior sliding pawl by covering 128 lozenges Crosspoint.Afterwards in the case where the inner fluid pressure of oil pocket 305 controls with Engine ECU quickly reduce, the inner fluid pressure of oil pocket 303 with Under the effects such as the elastic restoring force of the lower quick increase of Engine ECU control and its inside spin spring 127, interior sliding pawl set 128 is counter to be pushed away Interior indexing pawl 130 slides to right-hand member, because the lozenges structure of interior guide rail 129 and interior sliding pawl set 128 promotes interior sliding pawl to cover 128 phases Internal guide rail 129 turns over certain circumferential angle in a circumferential direction.Now relative to the quick increasing of the inner fluid pressure of oil pocket 303 Add, the inertial force that the interior lozenges structure of guide rail 129 is formed when being rotated with sleeve 119 can be ignored, and promote interior lead Rail 129 quickly slips over 128 lozenges of interior sliding pawl set and entered in guide groove 603.

It is because guide rail 129 keeps geo-stationary in a circumferential direction with interior indexing pawl 130 on the inwall of sleeve 119, i.e., interior The synchronous axial system generation that sliding pawl covers 128 relative sleeves 119 rotates in same direction, and its turning circumference angle covers 128 single wedges for interior sliding pawl The circular arc width sum of circumference arc corresponding to shape face and interior guide rail 129, it is corresponding that its value is equal to outer sliding 122 single lozenges of pawl set Circumference arc.Sleeve 119 is with the synchronous axial system of shell 115 simultaneously, and camshaft 111 is with the interior indexing opposite shell 115 of pawl 130 with phase It is equidirectional to turn over corresponding circumference arc in advance, therefore camshaft 111 turns over certain angle in advance with respect to sprocket wheel 112.Now should VVT drive device realizes the overhead cam of camshaft 111 with respect to sprocket wheel by rotating in same direction for therein mechanism 112 rotational angles shift to an earlier date, i.e., so-called valve shifts to an earlier date closure or openness, and it promotes valve overlap to increase, and then improve row Gas effect, help to improve the fuel economy of low engine speeds active section and the torque output of big torque active section.

According to vehicle driving-cycle real-time change, aforesaid operations mistake can be repeated according to vehicle driving demand by Engine ECU Journey, realize that valve is secondary or timing three times, the lozenges width that its timing number is put by speed and sliding pawl determine.When vehicle stops When only, Engine ECU control variable valve timing control apparatus returns to initial rest position.

When example two is gradually reduced suitable for vehicle speed of operation, when speed is by dropping at a high speed high speed or by high speed Engine ECU corresponding control when dropping to middle low speed or being dropped to low speed by middle low speed or increased torque output by motor instant VVT.

During vehicle actual travel, the VVT drive device can detect real-time according to different sensors Speed, engine speed, the corner etc. of sprocket wheel opposing cam axle, different oil pocket inner fluids are adjusted by Engine ECU in real time Oil mass and oil pressure change to change the position relationship that the inside and outside indexing pawl of sleeve 119 covers with sliding pawl, and control camshaft 111 is relative to chain Wheel 112 in the same direction or backwards rotation, realize the overhead cam phase of intake and exhaust cam axle 111 in advance or hysteresis, its corresponding air inlet Door change in displacement timing curve is as shown in figure 14.

Although embodiment of the present utility model is disclosed as above, it is not restricted in specification and embodiment Listed utilization, it can be applied to various suitable fields of the present utility model completely, for those skilled in the art, Other modification is easily achieved, therefore under the universal limited without departing substantially from claim and equivalency range, this reality Specific details is not limited to new and shown here as the legend with description.

Claims (10)

1. A kind of 1. VVT drive device, it is characterised in that including：

   Shell, it is in hollow cylindrical, and the outer guide of multiple protrusions is evenly distributed on the outer casing inner wall；The outer guide One end be provided with wedge-shaped working face；

   Sleeve, it is in hollow cylindrical and is co-axially located in shell, has been evenly distributed on the sleeve lining multiple convex The interior guide rail gone out；One end of the interior guide rail is provided with wedge-shaped working face；

   Outer indexing pawl, it is set in one end outside the sleeve, is provided with the outer indexing pawl and is engaged with the outer guide Outer guide groove, it is described it is outer indexing pawl inner side end on be provided with multiple outer indexing teeth circumferentially arranged；

   Outer sliding pawl set, its other end being set in outside the sleeve and the outer sliding pawl set are coordinated with sleeve by prismatic pair； Multiple sliding pawls of outer wedge shape circumferentially arranged are provided with the outer sliding pawl set inner side end；

   Camshaft, it is co-axially located in the sleeve；

   Interior indexing pawl, it is set between sleeve and camshaft, is provided with what is coordinated with the interior guide rail on the interior indexing pawl Interior guide groove, it is described it is interior indexing pawl inner side end on be provided with multiple interior indexing teeth circumferentially arranged；

   Interior sliding pawl set, it is set between sleeve and camshaft and the interior sliding pawl set is coordinated with camshaft by prismatic pair； Multiple sliding pawls of interior wedge shape circumferentially arranged are provided with the interior sliding pawl set inner side end；

   Wherein, the wedge-shaped working face of the outer indexing tooth and outer guide is engaged with the sliding pawl of outer wedge shape, makes outer indexing pawl along axle Line moves back and forth a cycle, and the outer sliding pawl set can be driven to rotate to an angle；The wedge of the interior indexing tooth and interior guide rail Shape working face is engaged with the sliding pawl of interior wedge shape, interior indexing pawl is moved back and forth a cycle along axis, can be driven in described Sliding pawl set rotates to an angle；The outer sliding pawl set is opposite with interior sliding pawl set direction of rotation.
2. 2. VVT drive device according to claim 1, it is characterised in that the both ends of the surface of the shell are in spacious Open type, the left and right ends of the shell are removably provided with left end cap and right end cap respectively.
3. 3. VVT drive device according to claim 2, it is characterised in that one end of the shell is fixed with Timing sprocket, it enables engine crankshaft to drive shell to rotate by coordinating with timing chain.
4. 4. VVT drive device according to claim 2, it is characterised in that one end of the shell is fixed with Timing belt pulley, it enables engine crankshaft to drive shell to rotate by coordinating with Timing Belt.
5. 5. the VVT drive device according to claim 3 or 4, it is characterised in that the outer sliding pawl set outside End face is provided with external spiral spring, and the end face outside of the outer indexing pawl is connected with the first oil pocket.
6. 6. VVT drive device according to claim 5, it is characterised in that the outboard end of the interior sliding pawl set Face is provided with inside spin spring, and the end face outside of the interior sliding pawl set is connected with the second oil pocket, the outboard end of the interior indexing pawl Face is connected with the 3rd oil pocket.
7. 7. VVT drive device according to claim 6, it is characterised in that branch is provided with the camshaft Pushing out ring, back-up ring is provided with the shell, the support ring coordinates with back-up ring, so that camshaft can be supported in shell.
8. 8. VVT drive device according to claim 7, it is characterised in that the inner side of the support ring is set There is sealing gasket.
9. 9. VVT drive device according to claim 8, it is characterised in that the first oil-feed on the camshaft Hole, the second fuel feed hole and enter three fuel feed holes, first fuel feed hole, the second fuel feed hole and enter three fuel feed holes respectively with the first oil Chamber, the second oil pocket and the connection of the 3rd oil pocket.
10. 10. VVT drive device according to claim 9, it is characterised in that first fuel feed hole passes through Flexible pipe connects with the first oil pocket, second fuel feed hole and enters three fuel feed holes respectively by the oil duct being arranged in camshaft and Two oil pockets and the connection of the 3rd oil pocket.