CN203374334U - Chain fixing type engine valve driving device - Google Patents
Chain fixing type engine valve driving device Download PDFInfo
- Publication number
- CN203374334U CN203374334U CN201320408432.7U CN201320408432U CN203374334U CN 203374334 U CN203374334 U CN 203374334U CN 201320408432 U CN201320408432 U CN 201320408432U CN 203374334 U CN203374334 U CN 203374334U
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- connecting rod
- driven plunger
- guiding groove
- working piston
- type engine
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Abstract
A chain fixing type engine valve driving device comprises a box body. A driving piston hole and a longitudinal blind hole are formed in the box body and communicated in an intersected mode, a driving piston is arranged in the driving piston hole, a guide groove is formed in the driving piston, a working piston is arranged at the outlet end of the longitudinal blind hole, a first connecting rod and a second connecting rod are arranged between the blind end of the longitudinal blind hole and the working piston, and one end of the first connecting rod and one end of the second connecting rod respectively stretch to the guide groove and are connected in the guide groove. When the working piston is located at the withdrawal position, the included angle formed between the two connecting rods is smaller than 180 degrees, and when the working piston is located at the stretching-out position, the two connecting rods are located on a same straight line. According to the chain fixing type engine valve driving device, driving force is transmitted to the working piston completely in a mechanical mode, hydraulic connection is not needed any more, leakage, deformation and load fluctuation caused by high oil pressure and high oil temperature are avoided, and the valve lift is not affected by the oil temperature, the oil pressure and the air content.
Description
Technical field:
The utility model relates to mechanical field, relates in particular to the vehicle startup machine technology, particularly a kind of solid chain type engine valve actuator.
Background technique:
In prior art, the method for the conventional valve actuation of vehicle motor is behaved and is known altogether, its application history of existing more than 100 year.But, due to the extra demand to motor discharge and engine braking, increasing motor need to, on the basis of conventional valve motion, increase auxiliary valve motion, as the valve motion of the valve motion for EGR and engine braking.Wherein, engine brake has become the device that heavy-duty commercial vehicle engine must be joined gradually.
But, the drive unit in existing auxiliary valve motion technology mostly is delivered to by the machinery input engine valve that will open through hydraulic connecting.There are many shortcomings in hydraulic connecting, as contractibility or the distortion of hydraulic system, and this flexibility with liquid relevant (link with solid or mechanical linkages is compared).The high flexibility of hydraulic connecting causes a large amount of compressions of valve lift to reduce, and hydraulic bearing also has wave properties and unstability, and valve lift is subject to the impact of oil pressure, oil temperature, leakage and air content etc., causes hydraulic system to be out of shape greatly, to react slow and poor reliability.
The model utility content:
The purpose of this utility model is to provide a kind of solid chain type engine valve actuator, and the system variant that the valve actuator that described this solid chain type engine valve actuator will solve the available technology adopting hydraulic connecting exists is large, reaction is slow and the technical problem of poor reliability.
This solid chain type engine valve actuator of the present utility model, comprise a casing, wherein, be provided with a driven plunger hole and a vertical blind hole in described casing, described driven plunger hole intersects and communicates with described vertical blind hole, be provided with a driven plunger in the driven plunger hole, be provided with a guiding groove in described driven plunger, the length direction of described guiding groove is axially identical with driven plunger, the bearing of trend of guiding groove is vertical with the length direction of guiding groove, guiding groove radially runs through driven plunger along driven plunger on its bearing of trend, vertically in the outlet end of blind hole, be provided with a working piston, described working piston vertically has a retracted position and an extended position in blind hole, vertically between the cecum of blind hole and working piston, be provided with a first connecting rod and a second connecting rod, described first connecting rod and second connecting rod are Spielpassung with guiding groove at the width direction of guiding groove respectively, the length of guiding groove is greater than the diameter of first connecting rod and second connecting rod, one end of first connecting rod and an end of second connecting rod extend to respectively in the guiding groove in driven plunger and in guiding groove and form along the revolving connection of guiding groove length direction, when working piston is positioned at retracted position, first connecting rod and second connecting rod are the angle that is less than 180 degree, when working piston is positioned at extended position, first connecting rod and second connecting rod are located along the same line, be provided with an elastic mechanism between one end of driven plunger and an end in driven plunger hole, be provided with a variable-volume cavity volume between the other end in driven plunger hole and the other end of driven plunger, described variable-volume cavity volume is communicated with a fluid passage in casing.
Further, be provided with an axial bore in the driven plunger end face adjacent with described elastic mechanism at it, described axial bore extends to described guiding groove and is communicated with guiding groove, described elastic mechanism comprises elastic element and return spin or return push rod, described return spin or return push rod are arranged in the axial bore of driven plunger, and elastic element is setovered described return spin or return push rod to the connection part of first connecting rod and second connecting rod.
Further, described elastic element consists of spring, and an end adjacent with elastic element in the driven plunger hole is provided with spring seat.
Further, described working piston lower end is connected with a working spring, and the other end of described working spring is placed on described casing.
Further, vertically in the cecum of blind hole, be provided with a valve clearance adjusting screw, an end face of described valve clearance adjusting screw is connected with an end of first connecting rod.
Further, be provided with a discharge orifice in casing, described discharge orifice is communicated with vertical blind hole with the casing outside.
Further, the junction surface of an end of first connecting rod and an end of second connecting rod is sphere or cylinder, and the junction surface that the other end of second connecting rod is connected with the working piston upper end is sphere or cylinder.
Further, the junction surface that the valve clearance adjusting screw is connected with the other end of first connecting rod is sphere.
Further, the sphere of working piston upper end is the ball-and-socket face, is provided with between the end face of the working piston that described ball-and-socket face is adjacent and is tilted to outer transitional surface or conical surface.
Further, the rocking arm that described casing is motor.
Working principle of the present utility model is: when needing the auxiliary valve motion of motor, such as, in the time of need to being converted to the engine braking state from the engine ignition state, the control mechanism of motor is opened fuel feeding, and machine oil flows to the driven plunger of valve actuator by the fluid passage in fluid network and casing.Oil pressure overcomes the load that the spring that acts on driven plunger and the working spring on working piston apply, by driven plunger from the driven plunger hole to extrapolation, first connecting rod and second connecting rod are become vertically from inclination, second connecting rod makes working piston become extended position from retracted position, driving mechanism becomes operating position from off position, the driving force that casing is subject to is directly delivered to first connecting rod, be delivered to second connecting rod by first connecting rod again, be delivered to again working piston, realize the switching of motor from normal working to the engine braking state, the driving force that casing is subject to is not delivered to working piston by any hydraulic way.When not needing auxiliary valve motion, when not needing engine braking, engine control gear cuts out emptying, driven plunger is not subject to the oil pressure effect, inwardly move under the effect of spring, rest on the end face of the inner, driven plunger hole, first connecting rod and second connecting rod are from vertically becoming inclination again, working piston vertically in blind hole, upwards being retracted into off position, separates with the motor normal operation under the effect of working spring.
The utility model is compared with prior art, and its effect is actively with obvious.The utility model, without adopting hydraulic control valve, has reduced cost, has reduced design space and reaction time; The driving force that casing is subject to is directly delivered to first connecting rod, be delivered to second connecting rod by first connecting rod again, be delivered to again working piston, no longer adopt hydraulic connecting or carrying, the leakage, distortion and the load fluctuation that do not have high oil pressure and high oil temperature to cause, valve lift is not subject to the impact of oil temperature, oil pressure and air content, and valve lift can design littlely, has reduced the gap between engine piston and valve.
The accompanying drawing explanation:
Fig. 1 is the structural representation of the first embodiment when off-position of the solid chain type engine valve actuator of the utility model.
Fig. 2 is the structural representation of the first embodiment when " opening " position of the solid chain type engine valve actuator of the utility model.
Fig. 3 is the structural representation of the second embodiment when off-position of the solid chain type engine valve actuator of the utility model.
Fig. 4 is the structural representation of the second embodiment when " opening " position of the solid chain type engine valve actuator of the utility model.
Fig. 5 is the first embodiment's of the solid chain type engine valve actuator of the utility model application schematic diagram.
Embodiment:
Embodiment 1:
Fig. 1 and Fig. 2 have meaned respectively the structure of the first embodiment when " pass " and " opening " position of the solid chain type engine valve actuator of the utility model.Gu chain type engine valve actuator 100, consist of a casing 2102, two connecting rods (upper connecting rod 184 and lower link 186, its diameter is identical), working piston 160, a driven plunger 162 and a return spin 164.Be provided with driven plunger hole 260 and vertical blind hole 190 in casing 2102, driven plunger hole 260 and vertical blind hole 190 intersect.Driven plunger 162 is positioned at the driven plunger hole 260 of casing 2102.Be provided with the guiding groove axial along it 137 in driven plunger 162, the part of upper connecting rod 184 and lower link 186 is positioned at guiding groove 137, the diameter of the width of guiding groove 137 and upper connecting rod 184 and lower link 186 is roughly the same, there are two cylindrical inclined-planes 163 on the right of guiding groove 137 (near the driven plunger outer end of hole), roughly the same with upper connecting rod 184 and the residing inclination of lower link 186 in Fig. 1.Driven plunger 162 is provided with an axial bore 290 at it in the side near 260 outer ends, driven plunger hole, with guiding groove 137, is communicated with.Return spin 164 is placed in axial bore 290.Return spring 156 is pushed return spin 164, upper connecting rod 184 and lower link 186 and driven plunger 162 to the left side (the inner, driven plunger hole), makes driven plunger 162 rest in (see figure 1) on the end face 246 of 260 the inners, driven plunger hole.The other end of return spring 156 is positioned on the spring seat 158 of driven plunger outer end of hole, and spring seat 158 is by ring washer 157 location that are fixed on casing 2102.Vertical blind hole 190 bottoms in casing 2102 are provided with working piston 160.
The lower end of upper connecting rod 184 is connected with the upper end of lower link 186, and its surface of contact is sphere 125, and two ends all are contained in guiding groove 137.The lower end of lower link 186 is connected with working piston 160 upper ends, and its surface of contact is sphere 128.The sphere 128 and one of working piston 160 upper ends is tilted to outer transitional surface (or conical surface) 126 and joins, and the inclination of 126 inclination angle, plane of inclination and lower link 186 is roughly the same.The lower end of working piston 160 is placed in an end of working spring 177, and the other end of working spring 177 is arranged on casing 2102 by nut 179.Working spring 177 by working piston 160 biasings upwards, is close to the lower end of lower link 186.
For adjustable brake valve clearance (initial position of working piston 160), driving mechanism 100 also contains the valve clearance controlling mechanism, comprises valve clearance adjusting screw 1102, and the lower end of adjusting screw 1102 is connected with the upper end of upper connecting rod 184, and its surface of contact is sphere 122.The upper end of adjusting screw 1102 is fastened on casing 2102 by nut 1052.Be provided with fluid passage 214 in casing 2102, level is blind, and 260 are connected with the machine oil fluid network of motor.Draining hole 168 on casing 2102, by vertical blind hole 190 and extraneous the connection, prevents the hydraulic pressure locking that leakage of oil causes.
The working procedure of the present embodiment is: when needing the auxiliary valve motion of motor, such as, in the time of need to being converted to the engine braking state from the engine ignition state, the control mechanism (not shown) of motor is opened fuel feeding, machine oil is by the fluid passage 214 in in-engine fluid network and casing 2102, the valve actuator 100 of the flow direction.Oil pressure overcomes the load that the return spring 156 that acts on driven plunger 162 and the working spring 177 on working piston 160 apply, by driven plunger 162 from driven plunger hole 260 to the right (or outwards) push away.Driven plunger 162 promotes connecting rod 184 to the right, connecting rod 184 and lower link 186 are become vertically from inclination, the working piston 160 be connected with lower link 186 lower ends becomes extended position from retracted position, valve actuator 100 becomes operating position (Fig. 2) from off position (Fig. 1), realizes the switching (reference below the applicating example of Fig. 5) of motor from fired state to the engine braking state.
When not needing the auxiliary valve motion of motor while not needing engine braking (or), the control mechanism of motor cuts out emptying, driven plunger 162 is not subject to oil pressure, and under the effect of return spring 156, (or inwardly) moves left, rests on the end face 246 of 260 the inners, driven plunger hole.Upper connecting rod 184 and lower link 186 are from vertically becoming again as tilting (Fig. 1), and working piston 160 vertically upwards is being retracted into off position in blind hole 190 under the effect of working spring 177, separates (with reference to the applicating example of following Fig. 5) with the valve of motor.
Embodiment 2:
Fig. 3 and Fig. 4 have meaned respectively the structure of the second embodiment when " pass " and " opening " position of the solid chain type engine valve actuator of the utility model.The present embodiment is embodiment 1 differentiation, and both unique differences are return push rod 162 replacements by the present embodiment of embodiment 1 return spin, and both working principles are identical, at this, no longer describe in detail.
Fig. 5 is first embodiment's of the solid chain type engine valve actuator of the utility model an application schematic diagram.The casing 2102 of the valve actuator 100 here is an engine braking dedicated rocker arm, and valve actuator 100 also comprises brake cam 2302, cam follower wheel 2352 and retaining spring 1982.2302 of brake cams contain the small boss 232 and 233 be positioned on basic circle 2252, for engine braking.
The normal ignition running of engine exhaust port drives generation by conventional exhaust valve system or the valve actuator 200 of motor.Conventional exhaust valve is 200 to comprise cam 230, cam follower wheel 235, rocking arm 210, valve bridge 400, and exhaust valve 300.Two valves 3001 of exhaust valve 300 and 3002 are biased on the valve seat 320 of engine cylinder-body 500 by engine valve spring 3101 and 3102, stop gas to flow between engine cylinder and outlet pipe 600.Rocking arm 210 is arranged on pitman arm shaft 205 rock typely, by the motion of cam 230, passes to exhaust valve 300, and it is is periodically opened and closed.Also may there be miscellaneous part in conventional exhaust valve system, as the valve clearance adjusting screw with resemble foot pad etc., for the purpose of concise and to the point, at this, economizes approximately.Cam 230 has a large boss 220 at interior basic circle more than 225, produce the main valve lift curve, for normal engine ignition running.
When the needs motor is converted to the engine braking state from normal working, engine braking control mechanism (not shown) is opened fuel feeding, machine oil is by the brake fluid networking, comprise the fluid passage 214 in fluid passage 211, radial hole 212 and the rocking arm in pitman arm shaft 205, flow to driven plunger 162.Oil pressure first, after overcome spring 177 on working piston 160 and the load of the return spring 156 on driven plunger 162, by driven plunger 162 from driven plunger hole 260 to the right (or outwards) push away.Driven plunger 162 promotes connecting rod 184 to the right, and connecting rod 184 and lower link 186 are become vertically from inclination.The working piston 160 be connected with lower link 186 lower ends becomes extended position from retracted position, and driving mechanism 100 becomes operating position (Fig. 2) from off position (Fig. 1).The stroke of working piston 160 has been eliminated the gap 132 between the described working piston 160 of Fig. 5 and push rod 116, link (or mechanical linkages) with formation solid between exhaust valve 3001, the solid link that moves through valve actuator 100 and push rod 116 formation that the small boss 232 and 233 of brake cam 2302 produces is delivered to exhaust valve 3001, produces the auxiliary valve motion of engine braking.
When not needing engine braking, the engine braking control mechanism cuts out emptying, driven plunger 162 is not subject to oil pressure, under the effect of return spring 156, (or inwardly) moves left, rest on the end face of the inner, driven plunger hole (Fig. 2 and Fig. 5), connecting rod 184 and 186 is from vertically becoming again as tilting, working piston 160 vertically upwards is being retracted into off position in blind hole 190, and form gap 132 between push rod 116, the motion that the small boss 232 and 233 of brake cam 2302 produces can't pass to exhaust valve 3001, make valve actuator 100 separate with the motor normal operation, do not produce any auxiliary valve motion.
Embodiment of the present utility model describes the utility model, rather than is limited.In fact, those people that are expert at one's trade can show to change places and in scope of the present utility model and principle, the utility model modified and change.For instance, illustrated or certain part of functions described of concrete mechanism, can be used for another concrete mechanism, and then obtain a new mechanism.Embodiment's valve actuator not only can also be integrated in the exhaust rocker arm 210 of motor in the special-purpose brake rocker arm 2102 shown in Fig. 5, or is placed in any position of motor.In addition, between the upper end of the lower end of upper connecting rod 184 and lower link 186, upper end and the casing 2102(of upper connecting rod 184 do not have adjusting screw) or the lower end of adjusting screw 1102 between and the connection between the upper end of the lower end of lower link 186 and brake piston 160 except being sphere, can be also cylinder or other connection.Also have, the working spring of working piston lower end, except being flat spring, can also be other form, as cylinder-shaped compression spring or volute spring etc.In addition, the utility model not only can be for engine braking, also can be for other auxiliary valve motion of EGR or the motor of motor; Not only can be used for the valve that begins to rehearse, also can drive valve into; Not only can be used for out single valve, also can open many valves.Therefore, the utility model will comprise above-mentioned modification and change, as long as within they belong to appended claim or the scope suitable with the institute prescription.
Claims (10)
1. consolidate the chain type engine valve actuator for one kind, comprise a casing, it is characterized in that: be provided with a driven plunger hole and a vertical blind hole in described casing, described driven plunger hole intersects and communicates with described vertical blind hole, be provided with a driven plunger in the driven plunger hole, be provided with a guiding groove in described driven plunger, the length direction of described guiding groove is axially identical with driven plunger, the bearing of trend of guiding groove is vertical with the length direction of guiding groove, guiding groove radially runs through driven plunger along driven plunger on its bearing of trend, vertically in the outlet end of blind hole, be provided with a working piston, described working piston vertically has a retracted position and an extended position in blind hole, vertically between the cecum of blind hole and working piston, be provided with a first connecting rod and a second connecting rod, described first connecting rod and second connecting rod are Spielpassung with guiding groove at the width direction of guiding groove respectively, the length of guiding groove is greater than the diameter of first connecting rod and second connecting rod, one end of first connecting rod and an end of second connecting rod extend to respectively in the guiding groove in driven plunger and in guiding groove and form along the revolving connection of guiding groove length direction, when working piston is positioned at retracted position, first connecting rod and second connecting rod are the angle that is less than 180 degree, when working piston is positioned at extended position, first connecting rod and second connecting rod are located along the same line, be provided with an elastic mechanism between one end of driven plunger and an end in driven plunger hole, be provided with a variable-volume cavity volume between the other end in driven plunger hole and the other end of driven plunger, described variable-volume cavity volume is communicated with a fluid passage in casing.
2. solid chain type engine valve actuator as claimed in claim 1, it is characterized in that: in the driven plunger end face adjacent with described elastic mechanism at it, be provided with an axial bore, described axial bore extends to described guiding groove and is communicated with guiding groove, described elastic mechanism comprises elastic element and return spin or return push rod, described return spin or return push rod are arranged in the axial bore of driven plunger, and elastic element is setovered described return spin or return push rod to the connection part of first connecting rod and second connecting rod.
3. solid chain type engine valve actuator as claimed in claim 2, it is characterized in that: described elastic element consists of spring, and an end adjacent with elastic element in the driven plunger hole is provided with spring seat.
4. solid chain type engine valve actuator as claimed in claim 1, it is characterized in that: described working piston lower end is connected with a working spring, and the other end of described working spring is placed on described casing.
5. solid chain type engine valve actuator as claimed in claim 1, it is characterized in that: vertically in the cecum of blind hole, be provided with a valve clearance adjusting screw, an end face of described valve clearance adjusting screw is connected with an end of first connecting rod.
6. solid chain type engine valve actuator as claimed in claim 1, it is characterized in that: be provided with a discharge orifice in casing, described discharge orifice is communicated with vertical blind hole with outside casing.
7. solid chain type engine valve actuator as claimed in claim 1, it is characterized in that: the junction surface of an end of first connecting rod and an end of second connecting rod is sphere or cylinder, and the junction surface that the other end of second connecting rod is connected with the working piston upper end is sphere or cylinder.
8. solid chain type engine valve actuator as claimed in claim 5, it is characterized in that: the junction surface that the valve clearance adjusting screw is connected with the other end of first connecting rod is sphere.
9. solid chain type engine valve actuator as claimed in claim 7, it is characterized in that: the sphere of working piston upper end is the ball-and-socket face, is provided with between the end face of the working piston that described ball-and-socket face is adjacent and is tilted to outer transitional surface or conical surface.
10. solid chain type engine valve actuator as claimed in claim 1, is characterized in that: the rocking arm that described casing is motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320408432.7U CN203374334U (en) | 2013-07-10 | 2013-07-10 | Chain fixing type engine valve driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320408432.7U CN203374334U (en) | 2013-07-10 | 2013-07-10 | Chain fixing type engine valve driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203374334U true CN203374334U (en) | 2014-01-01 |
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ID=49836867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320408432.7U Expired - Fee Related CN203374334U (en) | 2013-07-10 | 2013-07-10 | Chain fixing type engine valve driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203374334U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507974A (en) * | 2014-09-30 | 2016-04-20 | 上海尤顺汽车部件有限公司 | Auxiliary valve actuating mechanism of engine |
| CN114876605A (en) * | 2021-05-13 | 2022-08-09 | 褚平华 | Valve driving device of engine and driving method thereof |
-
2013
- 2013-07-10 CN CN201320408432.7U patent/CN203374334U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507974A (en) * | 2014-09-30 | 2016-04-20 | 上海尤顺汽车部件有限公司 | Auxiliary valve actuating mechanism of engine |
| CN105507974B (en) * | 2014-09-30 | 2018-11-02 | 上海尤顺汽车部件有限公司 | A kind of engine auxiliary valve driving mechanism |
| CN114876605A (en) * | 2021-05-13 | 2022-08-09 | 褚平华 | Valve driving device of engine and driving method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20180710 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |