CN104975898B - A kind of integrated form rocking arm for being used to produce engine braking - Google Patents
A kind of integrated form rocking arm for being used to produce engine braking Download PDFInfo
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- CN104975898B CN104975898B CN201510430370.3A CN201510430370A CN104975898B CN 104975898 B CN104975898 B CN 104975898B CN 201510430370 A CN201510430370 A CN 201510430370A CN 104975898 B CN104975898 B CN 104975898B
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Abstract
The invention belongs to technical field of engines, refer in particular to a kind of integrated form rocking arm for being used to produce engine braking, rocking arm is arranged on rocker arm shaft, one end of rocking arm is provided with the drive mechanism that driving rocking arm is swung around rocker arm shaft, the other end of rocking arm is provided with arrestment mechanism, braking oil duct and oil leab are provided with rocker arm shaft, regulating bolt is braked with brake piston respectively by the first braking oil duct on rocking arm, braking oil duct on second braking oil duct connection rocker arm shaft, brake piston also connects the oil leab on rocker arm shaft by the first oil leab on rocking arm, and the oil leab on rocker arm shaft also connects drive mechanism by the second oil leab, drive mechanism drives rocking arm to be swung around rocker arm shaft, coordinate the action of solenoid signal control arrestment mechanism and then control the action of exhaust valve bridge or single air valve, the present invention need not separately set the mechanical-hydraulic structure of complexity, realize the integrated modular of engine braking mechanism, simplify, cost degradation.
Description
Technical field：
The invention belongs to technical field of engines, a kind of integrated form rocking arm for being used to produce engine braking is refered in particular to.
Background technology：
With the sustainable development and the quick construction of highway of domestic economy situation, using automobile as main means of transport
Logistics transportation turns into the important component of national economy already.Under the impetus of science and technology, truck is increasingly to heavy type
Change, high speed development, traditional mechanical friction type brake can't bear the heavy load at work, usually because friction disc wear is serious and
Brake hub temperature is too high and fails, and causes traffic accident to take place frequently, and endangers personal safety.In this case, efficiently, continually and steadily
Retardative property and engine brake without material consumption, receive significant attention, and progressively popularization and application.And in 2012
Bottom, country has shutting mechanism also to put into effect on regulation truck of the compulsive requirement more than 12 tons and large commercial car to set up slowly
Brake apparatus.
In the prior art, engine braking technology is well known.One precedent of engine braking apparatus is by health
The hydraulic engine brake that bright this (Cummins) is disclosed in nineteen sixty-five in U.S. Patent number 3220392.Hair in the technology
Mechanical input is delivered to the exhaust valve to be opened by motivation brake by hydraulic circuit.Above-mentioned engine braking process is to send out
Motivation, which is temporarily converted to compressor, can just realize engine braking.Fuel oil is cut off in transfer process, in engine piston pressure
Contracting stroke opens exhaust valve at the end of, it is allowed to which, by compressed gas (being air during braking) release, engine is in compression stroke
The energy that middle compressed gas is absorbed, it is impossible to return to engine piston in subsequent expansion stroke, but pass through engine
Exhaust and cooling system are dissipated.Effective engine braking is finally realized, slows down the speed of vehicle.
The engine compression brake mode of present main flow mainly has following several：
1st, such as engine braking apparatus of early stage comingses, is a kind of annex of overhead on the engine, on the engine
Increase a small valve, be responsible for engine braking specially., will between cylinder and bonnet in order to install such engine brake
Packing ring is added, extraly increases height, weight and the cost of engine；
2nd, No. 6234143 patent of U.S. mark (Mack) truck company in 2001 discloses another integrated form rocking arm
Brake, it is additionally arranged exhaust gas recirculatioon (EGR) boss again in original cam mechanism, adds air valve bridge, and it is in braking
An exhaust valve is only opened, and there is asymmtric load on valve bridge and rocking arm；
3rd, engine braking apparatus is integrated among conventional exhaust rocking arm, hair is realized by setting up Cam braking projection
Motivation is braked, and this structure is more compact, lightweight, and complete machine is considerably reduced on the basis of it can realize engine braking
Weight and volume.
But with regard in the developmental research of this integrated form rocker arm system, also there are many weak points at present.Such as 1974
Year U.S. can all win (JVS) company patent the 3809033rd disclose it is a kind of in braking when brake piston is hydraulically locked in
Extended position, cam is moved and passes to valve bridge while opening the mode of two valves, causes rocking arm to bear great load；It is auspicious
Allusion quotation Volvo (Volvo) company is in the integrated form disclosed in No. 5564385 patent in 1996 for overhead four-air valve engine
Rocker arm-braking system, is additionally arranged the oil supply mechanism that single channel provides double oil pressure, and low oil pressure is used to lubricate, and high oil pressure is used to brake,
Add the complexity of system；One kind of Application No. 200810024409.2 is started disclosed in Saic Chery Automobile Co., Ltd
Machine braking device, it is easy to control, but need to increase extra cam switching device, manufacture and assembly cost are of a relatively high.
The content of the invention：
It is an object of the invention to provide a kind of modularization for realizing engine braking apparatus, simplification, cost degradation use
In the integrated form rocking arm for producing engine braking.
What the present invention was realized in：
A kind of integrated form rocking arm for being used to produce engine braking, rocking arm is arranged on rocker arm shaft, and one end of rocking arm is set
There is the drive mechanism that driving rocking arm is swung around rocker arm shaft, the other end of rocking arm is provided with arrestment mechanism, and the arrestment mechanism includes
There is braking regulating bolt and be arranged on the brake piston of braking regulating bolt bottom, exhaust valve is provided with below brake piston
Bridge or single air valve, are provided with braking oil duct and oil leab on rocker arm shaft, and braking regulating bolt is led to respectively with brake piston
The first braking oil duct on rocking arm, the braking oil duct on the second braking oil duct connection rocker arm shaft are crossed, brake piston also passes through rocking arm
Oil leab on upper first oil leab connection rocker arm shaft, and oil leab on rocker arm shaft also passes through the second oil leab and connects
Logical drive mechanism gives drive mechanism fuel feeding, and drive mechanism drives rocking arm to be swung around rocker arm shaft, coordinates solenoid signal control braking
The action of mechanism and then the action for controlling exhaust valve bridge or single air valve.
In the above-mentioned technical solutions, the braking regulating bolt, brake piston are coaxially mounted in the through hole of rocking arm, in system
Be provided with first annular oil groove in dynamic regulating bolt, be provided with the second annular oil groove on brake piston, the first braking oil duct with
The first annular oil groove connection in regulating bolt is braked, the second braking oil duct is connected with the second annular oil groove on brake piston.
In the above-mentioned technical solutions, the braking regulating bolt, which is provided with first annular oil groove, offers radial direction through hole,
Radial direction through hole is connected with leading to the oil-through hole of bolt bottom surface, and braking regulating bolt is connected with brake piston by oil-through hole, is braked
Regulating bolt is arranged on rocking arm by nut.
In the above-mentioned technical solutions, the brake piston is a cylindrical revolving body for carrying axial step type through hole, on
Provided with the check valve for opening and closing the oil-through hole in braking regulating bolt in portion's cavity, check valve is made up of steel ball and spring；Second
Offer to be provided with radial blind holes, blind hole at annular oil groove and open brake piston bottom in operating position blocking, off position
The control plunger in axial draining road, the afterbody of control plunger is provided with return spring, head and sets jagged, in cylinder revolution
The bottom of body is provided with the oil leak hole of connection blind hole；The installation of connection blind hole import is additionally provided with the bottom of cylindrical revolving body
It is provided with stop plunger or stop screw in hole, mounting hole, lacking for control plunger is stretched on the top of stop plunger or stop screw
Intraoral, brake piston bottom is connected with single air valve or exhaust valve bridge, brake piston by brake regulating bolt regulation with it is single
Gap between air valve is L, and gap L is detent bumps lift and the summation of emission valve clearance.
In the above-mentioned technical solutions, the oil leak hole is provided with two, is respectively：Blind hole afterbody is offered axially to braking
Miniature oil leak hole outside piston with connect blind hole and axially to the oil leak hole outside brake piston；
Or the oil leak hole is provided with one, it is specifically：Offered in the afterbody of blind hole outside axial direction to brake piston
Oil leak hole.
In the above-mentioned technical solutions, the bottom of the brake piston is provided with spring leaf, and one end of spring leaf, which is fixed on, shakes
On arm.
In the above-mentioned technical solutions, the spring overcoat of the check valve of the brake piston is equipped with preloading spring, preloading spring
One end withstand on the baseplane of regulating bolt, the other end is held out against on the step surface of axial step type through hole, now, adjust spiral shell
Gap between the baseplane of bolt and the upper plane of brake piston is L, and gap L is the total of detent bumps lift and emission valve clearance
With.
In the above-mentioned technical solutions, the regulation of operation exhaust valve bridge exhaust is provided with the rocking arm on the outside of the arrestment mechanism
Screw assembly.
In the above-mentioned technical solutions, the adjustment screw includes exhaust adjusting screw and is arranged on exhaust adjusting screw
The socket of lower section, adjusting screw is fixed on rocking arm by nut, and the upper end of exhaust adjusting screw is provided with radial direction oil, and from
The radial direction oil rises downwards and is additionally provided with the 3rd at the axial oil duct of socket, the radial direction oil of the exhaust adjusting screw
The second oil leab is provided with annular oil groove, rocking arm, the second oil leab is connected with the oil leab on rocker arm shaft, the second profit
Grease way is respectively communicated with the first annular oil groove on arrestment mechanism, is vented in the 3rd annular oil groove of adjusting screw and brake piston
Portion, the gap between the baseplane of socket and exhaust valve bridge or single air valve is H；
Or：The adjustment screw includes exhaust adjusting screw, and is arranged on the nest below exhaust adjusting screw
Seat, exhaust adjusting screw is fixed on rocking arm by nut, and radial direction oil is provided with the upper end of exhaust adjusting screw, and from radially
Oil duct, which rises downwards and run through at the axial oil duct of socket, the exhaust adjusting screw radial direction oil, is additionally provided with the 3rd annular oil
The second oil leab is provided with groove, rocking arm, the second oil leab is connected with the oil leab on rocker arm shaft, the second oil leab
It is respectively communicated with the middle part of the first annular oil groove on arrestment mechanism, the 3rd annular oil groove and brake piston, is provided with socket convex
Edge, one end of bias spring one is held out against on the convex edge of socket, the other end hold out against make on rocking arm the baseplane of socket all the time with
Exhaust valve bridge or the connection of single air valve, the gap being vented between the bottom of adjusting screw and the bottom of socket endoporus is H；
Or：The adjustment screw includes exhaust adjusting screw, and is arranged on the nest below exhaust adjusting screw
Seat, exhaust adjusting screw is fixed on rocking arm by screw, and radial direction oil is provided with the upper end of exhaust adjusting screw, and from radially
Oil duct, which rises downwards and run through at the axial oil duct of socket, the exhaust adjusting screw radial direction oil, is additionally provided with the 3rd annular oil
The second oil leab is provided with groove, rocking arm, the second oil leab is connected with the oil leab on rocker arm shaft, the second oil leab
It is respectively communicated with the middle part of the first annular oil groove on arrestment mechanism, the 3rd annular oil groove and brake piston, from baseplane on rocking arm
Blind hole has been set up, convex edge is provided with exhaust adjusting screw, one end of bias spring two is held out against on the top of blind hole, separately
One end is held out against on convex edge, socket is contacted connection, upper plane and the blind hole institute of convex edge with single air valve or exhaust valve bridge all the time
Gap between the baseplane of the rocking arm at position is H.
In the above-mentioned technical solutions, the drive mechanism includes the roller that one end is arranged on by pin, roller
Contact to be provided with raised normal exhaust, compression-release type detent bumps on connection, exhaust cam and brake with exhaust cam and follow again
Ring convex are risen, and exhaust cam rotational band motion rocker arm is swung around rocker arm shaft；
Or：The drive mechanism includes the adjusting screw for being arranged on one end, adjusting screw and valve lifter, very
Post and camshaft contact, adjusting screw contact band motion rocker arm with valve lifter, tappet and camshaft and swung around rocker arm shaft.
Prominent advantage is the present invention compared with prior art：
1st, the present invention need not separately set the mechanical-hydraulic structure of complexity, realize the integration module of engine braking mechanism
Change, simplification, cost degradation.
2nd, mounting and adjusting of the present invention is also very convenient, and applicability extensively, can meet two and enter a row, two enter the common gas such as two rows
Door arrangement；Single air valve braking is opened during double air valve can reduce rocking arm stress, significantly improve fatigue life, and avoid valve
Bridge stress is asymmetric.
3rd, the present invention shortens simultaneously oil circuit stroke and reduces executive component, improve engine braking sensitivity and can
By property.
Brief description of the drawings：
Fig. 1 is the diagrammatic cross-section of embodiment 1；
Fig. 2 is the schematic diagram of the brake piston of embodiment 1；
Fig. 3 is the schematic diagram of embodiment 2；
Fig. 4 is the schematic diagram of embodiment 3；
Fig. 5 is the schematic diagram of embodiment 4；
Fig. 6 is the schematic diagram of embodiment 5；
Fig. 7 is the schematic diagram of embodiment 6；
Fig. 8 is the schematic diagram of embodiment 7.
Embodiment：
With specific embodiment, the invention will be further described below,
Embodiment 1：Referring to Fig. 1-2：
A kind of integrated form rocking arm for being used to produce engine braking, rocking arm 1 is arranged on rocker arm shaft 2, and one end of rocking arm 1 leads to
Cross pin 3 and be provided with roller 4, roller 4 contacted with exhaust cam 5 be provided with connection, exhaust cam 5 normal exhaust projection 501,
Compression-release type detent bumps 502 and braking recycling projection 503, arrestment mechanism 6 is provided with the other end of rocking arm 1, described
Arrestment mechanism 6 includes braking regulating bolt 11 and is arranged on the brake piston of braking regulating bolt 11 bottom, brake piston
Lower section is provided with exhaust valve bridge 7 or single air valve 8, braking oil duct 9 and oil leab 10 is provided with rocker arm shaft 2, in rocking arm 1
On be provided with first oil leab 26 at connection pin 3 and the middle part of brake piston 19.
Above-mentioned braking regulating bolt 11, brake piston are coaxially mounted in the through hole of rocking arm 1, in braking regulating bolt 11
First annular oil groove 12 is provided with, the braking oil duct on the second annular oil groove 13, corresponding rocking arm 1 is provided with brake piston
Include the first braking braking oil duct 15 of oil duct 14 and second of the braking oil duct on connection rocker arm shaft, the first braking oil duct 14
Connected with the first annular oil groove 12 in braking regulating bolt 11, the second braking oil duct 15 and the second annular oil on brake piston
Groove 13 is connected.
Wherein, the braking regulating bolt 11, which is provided with first annular oil groove 12, offers radial direction through hole 16, radially logical
Hole 16 is connected with leading to the oil-through hole 17 of bolt bottom surface, and braking regulating bolt 11 is connected with brake piston by oil-through hole 17, is made
Dynamic regulating bolt 11 is fastened on rocking arm 1 by nut 18.
The brake piston is to be provided with to open in a cylindrical revolving body 19 for carrying axial step type through hole, upper chamber 33
The check valve of the oil-through hole 17 closed in braking regulating bolt 11, check valve is made up of steel ball 20 and spring 21；In the second annular oil
Offer to be provided with radial blind holes, blind hole at groove 13 and open brake piston bottom axial direction in operating position blocking, off position
The control plunger 22 in draining road, the head of plunger 22 is provided with return spring 29, and afterbody sets jagged, in cylindrical revolving body
19 bottom is provided with connection blind hole and is provided with oil leak hole, is respectively：Blind hole afterbody is offered outside axial direction to brake piston
Miniature oil leak hole 23 with connect blind hole and axially to the oil leak hole 24 outside brake piston；
Drain pan 31 is provided with exhaust valve bridge 7 or single air valve 8.
It is provided with the bottom of cylindrical revolving body 19 in the mounting hole 30 at connection blind hole import, mounting hole and sets limited
The top of position plunger 25 or stop screw, stop plunger 25 or stop screw is stretched into the breach of control plunger 22, brake piston
Bottom is connected with single air valve 8 or exhaust valve bridge 7, and brake piston is adjusted between single air valve 8 by braking regulating bolt 11
Gap be L, gap L is the summation of compression-release type detent bumps lift 502 and emission valve clearance.
The bottom of the brake piston is provided with spring leaf 27, and one end of spring leaf 27 is fixed on rocking arm 1 by screw 28
On.
The operation principle of the present embodiment：
When engine work, magnetic valve is in fuel feeding all the time in oil leab 10 on state, rocker arm shaft 2 is blocked
State, pin 3, roller 4 and the middle part of brake piston 19 are lubricated by oil duct on rocking arm 26 respectively；The nothing of oil duct 9 is braked on rocker arm shaft 2
Pressure oil is inputted, and oil duct 14,15 can not be also braked by rocking arm first and second to the fuel feeding of arrestment mechanism 6；Work as exhaust cam during work
5 turn to compression-release type detent bumps 502 when being contacted with roller 4, because preset clearance value L is exactly equal in arrestment mechanism 6
The summation of the lift of compression-release type detent bumps 502 and emission valve clearance, therefore the liter that compression-release type detent bumps 502 are produced
Journey is not enough to make up the preset clearance, so single air valve 8 can not be opened or exhaust valve bridge 7 realizes degassing function, here it is should
The role of preset clearance.When cam 5, which rotates to normal exhaust projection 501, to be contacted with roller 4, now valve rises larger,
Supplying after reserved valve clearance also has enough valve rising amount to act single air valve 8 or exhaust valve bridge 7, so as to open exhaust valve
Realize that normal exhaust is acted.
When needing to carry out engine auxiliary braking, magnetic valve is in opening state, on the one hand, engine passes through rocker arm shaft
Oil duct 9, the first braking oil duct 14 of rocking arm 2, first annular oil groove 12, radial direction oil 16 by regulating bolt 11 are braked on 2
Compressed with oil-through hole 17 after steel ball 20 and spring 21 to brake piston fuel feeding；On the other hand control plunger 22 is by rocker arm shaft brake oil
Road 9, the action of hydraulic force compression retracteding position spring 29 of the second braking oil duct 15 of rocking arm 2 are in operating position, so that closed brake
The oilhole 32 of piston；The oil circuit now opened originally：Brake the braking of oil duct 9 → the first oil duct 14 → 12 → footpath of first annular oil groove
To 33 → oilhole of oil duct 16 → oil-through hole, 17 → upper chamber 32 fluid back pressure, hydraulic coupling are set up after control plunger 22 is extended to
Mechanism 6 to be braked is forced to push spring leaf 27, when residing cavity pressure tends to be equal with the charge oil pressure of rocker arm shaft 2, check valve
It is up in the presence of return spring 29, it is in contact with braking regulating bolt 11 bottom and closes oil-through hole 17 (valve seat)；This
Shi Kaifang oil circuit is converted to brake oil locking chain, forms hydraulic rigid connection, and gap L is eliminated；Afterwards when exhaust cam 5
When turning to compression-release type detent bumps 502 and being contacted with roller 4, it is rigidly connected because arrestment mechanism 7 has been formed with rocking arm 1,
Lift produced by compression-release type detent bumps 502 can be in proportion act on brake piston, and touch exhaust valve bridge 7 or
Single air valve 8 opens exhaust valve to realize braking function in advance.Braking recycling projection 503 is with compression-release type detent bumps
502 courses of work are similar, repeat no more.
After the lift of compression-release type detent bumps 502 terminates, cam 5 is rotated further and close to normal exhaust projection 501
Contacted with roller 4, engine realizes normal exhaust function.
When closing magnetic valve, engine auxiliary braking terminates, and brake oil is not entered back into the braking oil duct 9 of rocker arm shaft 2,
No pressure oil input in arrestment mechanism 6, control plunger 22 is in off position under the effect of return spring 29, opens oil leak hole
The brake oil locking chain of 24 release closings, the hydraulic rigid connection formed at this is released from, and brake piston is acted in spring leaf 27
Under move up, recover the gap L with exhaust valve 7 or single air valve 8, a braking cycle is completed, and now engine recovers normal fortune
Turn state；If not releasing engine braking order, engine braking cycles can proceed with the operating of engine.
Embodiment 2：Referring to Fig. 3：
The present embodiment and the structure of embodiment 1 are essentially identical, and its difference is：
On the basis of the structure of embodiment 1, operation exhaust valve bridge exhaust is additionally arranged on the rocking arm 1 on the outside of arrestment mechanism
Adjustment screw 34, and the present embodiment arrestment mechanism 7 be used for open single air valve 8.
The adjustment screw 34 includes exhaust adjusting screw 35 and is arranged on the socket of the lower section of exhaust adjusting screw 35
36, adjusting screw 35 is fixed on rocking arm 1 by nut 42, and the upper end of exhaust adjusting screw 35 is provided with radial direction oil 37, and
From the radial direction oil 37 downwards and at the radial direction oil 37 of socket 36, the radial direction oil 37 of the exhaust adjusting screw 35
It is additionally provided with the 3rd annular oil groove 39, rocking arm 1 and is provided with the second oil leab 40, on the second oil leab 40 and rocker arm shaft 2
Oil leab 10 connect, and the outer end of the second oil leab 40 is in communication with the outside, and the end is blocked by plug 41, the second lubrication
Oil duct 40 is respectively communicated with first annular oil groove 12, the 3rd annular oil groove 39 of exhaust adjusting screw 35 and system on arrestment mechanism 6
The middle part of piston 19, baseplane and the distance between exhaust valve bridge or single air valve 8 H of socket 36, gap H is detent bumps
The summation of 502 lifts and emission valve clearance.
The operation principle of the present embodiment：
When engine work, magnetic valve is in fuel feeding all the time in oil leab 10 on state, rocker arm shaft 2 is blocked
State, pin 3, roller 4 are lubricated through oil leab 10 on rocking arm 1；Through the middle part of the lubrication of rocking arm oil duct 40 brake piston 19；Through rocking arm
Oil duct 40, brakes the first annular oil groove 12 of regulating bolt 11, and oil leab 40 is vented the 3rd annular oil groove of adjusting screw 34
39, radial direction oil 37, the lubrication of radial direction oil 37 exhaust adjusting screw 34 and socket 36 and the contact portion of exhaust valve bridge 7, exhaust
Adjusting screw 34 and socket 36 have the gap H with exhaust valve bridge 7；The input of the no pressure of oil duct 9 oil is braked on rocker arm shaft 2 to braking
Mechanism, arrestment mechanism has the gap L with being vented single valve 8.When exhaust cam 5 turns to compression-release type detent bumps during work
502 with roller 4 when contacting, due to preset clearance value L in arrestment mechanism and exhaust adjusting screw 34 with the gap H of exhaust valve bridge 7 just
It is equal to the lift of compression-release type detent bumps 502 and the summation of emission valve clearance well, therefore compression-release type detent bumps 502 are produced
Raw lift is not enough to make up preset clearance L and H, so can not open exhaust valve realizes degassing function, here it is this is reserved
The role of gap.When cam 5, which rotates to normal exhaust projection 501, to be contacted with roller 4, now valve rises larger, is supplying
There are enough valve rising amount to act exhaust valve bridge 7 and single air valve 8 after reserved valve clearance H and L, so as to open exhaust valve
Realize that normal exhaust is acted.
When needing to carry out engine auxiliary braking, magnetic valve is in phase in opening state, Oil feeding process be the same as Example 1
Together, arrestment mechanism is eliminated with the gap L of single air valve 8, but exhaust adjusting screw 34 is still suffered from the gap H of exhaust valve bridge 7,
Afterwards when exhaust cam 5, which turns to compression-release type detent bumps 502, to be contacted with roller 4, due to arrestment mechanism and rocking arm 2
Formation is rigidly connected, and what the lift produced by compression-release type detent bumps 502 can be in proportion acts on brake piston 70, and
Touch single air valve 102 and open exhaust valve in advance to realize braking function, and due to gap H presence, compression-release type braking
The lift that projection 502 is produced is not enough to make up preset clearance H, therefore will not open exhaust valve bridge by being vented adjusting screw 34
7, it is to avoid rocking arm opens the larger stress that exhaust valve bridge 7 (double air valve) is born during braking, so as to improve fatigue life kimonos
The labour cycle；Braking recycling projection 503 is similar with the course of work of compression-release type detent bumps 502, repeats no more.
After the lift of compression-release type detent bumps 502 terminates, cam 5 is rotated further and close to normal exhaust projection 501
Contacted with roller 4, engine realizes normal exhaust function.
When closing magnetic valve, engine auxiliary braking terminates, and brake oil does not enter back into the braking oil duct 11 of rocker arm shaft 2
Interior, no pressure oil input in arrestment mechanism, control plunger 22 is in off position under the effect of return spring 29, opens draining
The brake oil locking chain of hole release closing, the hydraulic rigid connection formed at this is released from, and is formulated mechanism and is acted in spring leaf 27
Under move up, recover to complete with the gap L of single air valve 8, a braking cycle, now engine recovers normal operation；Such as
Fruit does not release engine braking order, then engine braking cycles can proceed with the operating of engine.
Embodiment 3：Referring to Fig. 4：
The present embodiment and the difference of embodiment 2 are：The difference of the structure of adjustment screw 34.
The adjustment screw 34 includes exhaust adjusting screw 35, and is arranged on the nest of the lower section of exhaust adjusting screw 35
Seat 36, exhaust adjusting screw 35 is fixed on rocking arm by nut 42, and the upper end of exhaust adjusting screw 35 is provided with radial direction oil
37, and downwards and through the axial oil duct 38 of socket 36, the exhaust radial direction oil 37 of adjusting screw 35 from radial direction oil 37
Place, which is additionally provided with the 3rd annular oil groove 39, rocking arm, is provided with the second oil leab 40, on the second oil leab 40 and rocker arm shaft
Oil leab connection, and the outer end of the second oil leab 40 is in communication with the outside, and the end is blocked by plug 41, the second lubricating oil
Road 40 is respectively communicated with first annular oil groove, the 3rd annular oil groove on arrestment mechanism, and convex edge 42 is provided with socket 36, biasing
One end of spring 1 is held out against on the convex edge 42 of socket 36, the other end hold out against make on rocking arm the baseplane of socket 36 all the time with
Exhaust valve bridge 7 or the connection of single air valve, are vented the distance between the bottom of adjusting screw 35 and the bottom of the endoporus of socket 36 H,
Gap H is detent bumps lift and the summation of emission valve clearance.The effect of bias spring 1 brakes convex when being for normal work
Act the lift produced and gap is provided, and reduce the impact and vibration of exhaust adjusting screw and exhaust valve bridge, play a part of buffering.
Embodiment 4：Referring to Fig. 5：
The present embodiment and the difference of embodiment 2 are：The difference of the structure of adjustment screw 34.
The adjustment screw 34 includes exhaust adjusting screw 35, and is arranged on the nest of the lower section of exhaust adjusting screw 35
Seat 36, exhaust adjusting screw 35 is fixed on rocking arm by screw 43, and the upper end of exhaust adjusting screw 35 is provided with radial direction oil
37, and downwards and through the axial oil duct 38 of socket 36, the exhaust radial direction oil 37 of adjusting screw 35 from radial direction oil 37
Place, which is additionally provided with the 3rd annular oil groove 39, rocking arm, is provided with the second oil leab 40, on the second oil leab 40 and rocker arm shaft
Oil leab connection, and the outer end of the second oil leab 40 is in communication with the outside, and the end is blocked by plug 41, the second lubricating oil
Road 40 is respectively communicated with first annular oil groove, the 3rd annular oil groove on arrestment mechanism, has been set up on rocking arm from baseplane
Blind hole 44, is provided with convex edge 45 in exhaust adjusting screw 35, and one end of bias spring 2 46 is held out against on the top of blind hole 44, separately
One end is held out against on convex edge 45, socket 36 is contacted connection with single air valve or exhaust valve bridge all the time, the upper plane of convex edge 45 with
The distance between the baseplane of rocking arm at the place position of blind hole 44 is H, and gap H is the total of detent bumps lift and emission valve clearance
With.The effect of bias spring 2 46 is that the lift that detent bumps are produced during for normal work provides gap, and reduces exhaust tune
The impact and vibration between screw and exhaust valve are saved, plays a part of buffering.
Embodiment 5：Referring to Fig. 6：
The present embodiment and the structure of embodiment 1,2 are essentially identical, and its difference is：Oil leak hole is provided with one, will implement
Miniature oil leak hole in example 1 unites two into one with oil leak hole, is specifically：
Offered in the afterbody of the blind hole of brake piston axially to the big oil leak hole 24A outside brake piston, the present embodiment is only
Need an oil leak hole.
Embodiment 6：Referring to Fig. 7：
The present embodiment and the structure of embodiment 1,2 are essentially identical, and its difference is：
Preloading spring 21A, preloading spring 21A one end top are set with outside the spring 21 of the check valve of described brake piston
On the baseplane of regulating bolt 11, the other end held out against on the step surface of axial step type through hole.Preloading spring 21A rotation direction
With spring 21 on the contrary, now without being provided with spring leaf in the bottom of brake piston, then work of the brake piston in preloading spring 21A
Contacted all the time with single air valve 8 or exhaust valve bridge 7 under, gap L is placed on upper position.
Embodiment 7：Referring to Fig. 8：
Put in the Structure adaptation camshaft of the present embodiment with underlying layout pattern, can replace cam-roller contact shape
Formula：
The rocking arm is close to one end of valve lifter：Adjusting screw 47 and nut 48 are provided with rocking arm 1, both coordinate
Adjustable valve clearance, wherein connects valve lifter, tappet, camshaft etc. under adjusting screw 47.
Structure between the various embodiments described above is replaceable to be used.
Above-described embodiment is only one of presently preferred embodiments of the present invention, and the practical range of the present invention is not limited with this, therefore：
The equivalence changes that all shapes under this invention, structure, principle are done, all should be covered by within protection scope of the present invention.
Claims (8)
1. a kind of integrated form rocking arm for being used to produce engine braking, rocking arm is arranged on rocker arm shaft, one end of rocking arm is provided with
The drive mechanism that driving rocking arm is swung around rocker arm shaft, it is characterised in that：The other end of rocking arm is provided with arrestment mechanism, the braking
Mechanism includes braking regulating bolt and is arranged on the brake piston of braking regulating bolt bottom, is set in the lower section of brake piston
There are exhaust valve bridge or single air valve, braking oil duct and oil leab are provided with rocker arm shaft, braking regulating bolt is lived with braking
Plug connects the braking oil duct on rocker arm shaft by the first braking oil duct on rocking arm, the second braking oil duct respectively, and brake piston is also
Oil leab on rocker arm shaft is connected by the first oil leab on rocking arm, and oil leab on rocker arm shaft also passes through the second profit
Grease way connection drive mechanism gives drive mechanism fuel feeding, and drive mechanism drives rocking arm to be swung around rocker arm shaft, coordinates solenoid signal
Control the action of arrestment mechanism and then control the action of exhaust valve bridge or single air valve；
The adjustment screw of operation exhaust valve bridge exhaust is provided with rocking arm on the outside of the arrestment mechanism；
The adjustment screw include exhaust adjusting screw and be arranged on exhaust adjusting screw below socket, adjusting screw by
Nut is fixed on rocking arm, the upper end of exhaust adjusting screw is provided with radial direction oil, and downwards and passed through from the radial direction oil
Wear to be additionally provided with the axial oil duct of socket, the radial direction oil of the exhaust adjusting screw on the 3rd annular oil groove, rocking arm and set
There is the second oil leab, the second oil leab is connected with the oil leab on rocker arm shaft, and the second oil leab is respectively communicated with braking
First annular oil groove in mechanism, be vented in the middle part of the 3rd annular oil groove of adjusting screw and brake piston, the baseplane of socket with
Gap between exhaust valve bridge or single air valve is H；
Or：The adjustment screw includes exhaust adjusting screw, and is arranged on the socket below exhaust adjusting screw, row
Gas adjusting screw is fixed on rocking arm by nut, and the upper end of exhaust adjusting screw is provided with radial direction oil, and from radial direction oil
Rise downwards and be additionally provided with the 3rd annular oil groove at the axial oil duct of socket, the exhaust adjusting screw radial direction oil, shake
The second oil leab is provided with arm, the second oil leab is connected with the oil leab on rocker arm shaft, the second oil leab difference
First annular oil groove, the 3rd annular oil groove on arrestment mechanism are connected, convex edge, one end of bias spring one are provided with socket
Hold out against on the convex edge of socket, the other end is held out against the baseplane of socket is connected all the time with exhaust valve bridge or single air valve on rocking arm
Connect, be vented the gap H between the bottom of adjusting screw and the bottom of socket endoporus；
Or：The adjustment screw includes exhaust adjusting screw, and is arranged on the socket below exhaust adjusting screw, row
Gas adjusting screw is fixed on rocking arm by screw, and the upper end of exhaust adjusting screw is provided with radial direction oil, and from radial direction oil
Rise downwards and be additionally provided with the 3rd annular oil groove at the axial oil duct of socket, the exhaust adjusting screw radial direction oil, shake
The second oil leab is provided with arm, the second oil leab is connected with the oil leab on rocker arm shaft, the second oil leab difference
First annular oil groove, the 3rd annular oil groove on arrestment mechanism are connected, blind hole has been set up from baseplane on rocking arm, in row
Convex edge is provided with gas adjusting screw, one end of bias spring two is held out against to be held out against on convex edge in the top of blind hole, the other end, is made
Socket contacts connection, the upper plane of convex edge and the baseplane of the rocking arm at position where blind hole with single air valve or exhaust valve bridge all the time
Between gap be H.
2. a kind of integrated form rocking arm for being used to produce engine braking according to claim 1, it is characterised in that：The system
Dynamic regulating bolt, brake piston are coaxially mounted in the through hole of rocking arm, and first annular oil groove is provided with braking regulating bolt,
The second annular oil groove is provided with brake piston, the first braking oil duct connects with the first annular oil groove in braking regulating bolt
Logical, the second braking oil duct is connected with the second annular oil groove on brake piston.
3. a kind of integrated form rocking arm for being used to produce engine braking according to claim 2, it is characterised in that：The system
Dynamic regulating bolt, which is provided with first annular oil groove, offers radial direction through hole, radial direction through hole and the oil-through hole company for leading to bolt bottom surface
Logical, braking regulating bolt is connected with brake piston by oil-through hole, and braking regulating bolt is arranged on rocking arm by nut.
4. a kind of integrated form rocking arm for being used to produce engine braking according to claim 2, it is characterised in that：The system
Piston is provided with keying braking regulating bolt in a cylindrical revolving body for carrying axial step type through hole, upper chamber
The check valve of oil-through hole, check valve is made up of steel ball and spring；Offer and set in radial blind holes, blind hole at the second annular oil groove
There is the control plunger that the axial draining road in brake piston bottom is opened in operating position blocking, off position, control the head of plunger
Portion is provided with return spring, afterbody and sets jagged, and the oil leak hole of connection blind hole is provided with the bottom of cylindrical revolving body；
The bottom of cylindrical revolving body is additionally provided with the mounting hole at connection blind hole import, mounting hole and is provided with stop plunger or spacing
The top of screw, stop plunger or stop screw is stretched into the breach of control plunger, and brake piston bottom is with single air valve or row
Air valve bridge is connected, and brake piston is L by braking the gap between regulating bolt regulation and single air valve, and gap L is convex to brake
Play lift and the summation of emission valve clearance.
5. a kind of integrated form rocking arm for being used to produce engine braking according to claim 4, it is characterised in that：It is described to let out
Oilhole is provided with two, is respectively：Blind hole afterbody offer axially to the miniature oil leak hole outside brake piston with connect blind hole simultaneously
Axially to the oil leak hole outside brake piston；
Or the oil leak hole is provided with one, it is specifically：Offered axially to the draining outside brake piston in the afterbody of blind hole
Hole.
6. a kind of integrated form rocking arm for being used to produce engine braking according to any one of claim 2-5, its feature exists
In：The bottom of the brake piston is provided with spring leaf, and one end of spring leaf is fixed on rocking arm.
7. a kind of integrated form rocking arm for being used to produce engine braking according to any one of claim 4-5, its feature exists
In：The spring overcoat of the check valve of the brake piston is equipped with preloading spring, and one end of preloading spring withstands on the bottom of regulating bolt
In plane, the other end hold out against on the step surface of axial step type through hole, now, the baseplane of regulating bolt and brake piston
Gap between upper plane is L, and gap L is detent bumps lift and the summation of emission valve clearance.
8. a kind of integrated form rocking arm for being used to produce engine braking according to claim 1, it is characterised in that：It is described to drive
Motivation structure includes the roller that one end is arranged on by pin, and roller is contacted with exhaust cam to be set on connection, exhaust cam
It is equipped with normal exhaust raised, compression-release type detent bumps and braking recycling raised, exhaust cam rotational band motion rocker arm is around shaking
Arm axle is swung；
Or：The drive mechanism includes the adjusting screw for being arranged on one end, adjusting screw and valve lifter, tappet and
Camshaft is contacted, and adjusting screw contacts band motion rocker arm with valve lifter, tappet and camshaft and swung around rocker arm shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430370.3A CN104975898B (en) | 2015-07-21 | 2015-07-21 | A kind of integrated form rocking arm for being used to produce engine braking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510430370.3A CN104975898B (en) | 2015-07-21 | 2015-07-21 | A kind of integrated form rocking arm for being used to produce engine braking |
Publications (2)
| Publication Number | Publication Date |
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| CN104975898A CN104975898A (en) | 2015-10-14 |
| CN104975898B true CN104975898B (en) | 2017-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510430370.3A Active CN104975898B (en) | 2015-07-21 | 2015-07-21 | A kind of integrated form rocking arm for being used to produce engine braking |
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| CN105332757A (en) * | 2015-10-26 | 2016-02-17 | 无锡市永亿精密铸造有限公司 | Automobile valve rocker embedded with tension pulleys |
| CN107031717A (en) * | 2016-12-20 | 2017-08-11 | 安徽江淮汽车集团股份有限公司 | Motor turning transition rocker arm assembly |
| KR102335529B1 (en) * | 2017-09-12 | 2021-12-03 | 현대자동차주식회사 | Engine brake device |
| DE102017009535A1 (en) * | 2017-10-13 | 2019-04-18 | Daimler Ag | Valve drive for an internal combustion engine of a motor vehicle |
| CN112805455B (en) | 2018-05-24 | 2023-06-23 | 伊顿智能动力有限公司 | Carrier with integrated engine brake and lubrication circuit |
| CN109538325A (en) * | 2018-12-20 | 2019-03-29 | 皆可博(苏州)车辆控制系统有限公司 | A kind of integrated engine braking device |
| CN109958492B (en) * | 2019-03-22 | 2024-04-23 | 东风商用车有限公司 | Adjustable engine brake actuating mechanism and application method thereof |
| CN110173321B (en) * | 2019-06-04 | 2023-07-21 | 浙江大学 | Engine integrated variable rocker arm retarder and working method thereof |
| CN110374712B (en) * | 2019-06-12 | 2024-04-19 | 浙江大学 | Integrated engine braking device and working method thereof |
| CN114729581B (en) * | 2019-08-19 | 2024-01-12 | 上海尤顺汽车技术有限公司 | Valve driving device and valve driving mechanism for engine |
| CN110486114B (en) * | 2019-08-26 | 2020-10-02 | 东风商用车有限公司 | Integrated engine brake execution piston |
| CN110552751A (en) * | 2019-09-18 | 2019-12-10 | 广西玉柴机器股份有限公司 | take lubricating structure's inside and outside roller type rocking arm |
| CN110685768B (en) * | 2019-10-18 | 2021-07-20 | 姬腾飞 | Variable valve driving device of engine and engine |
| US11008901B1 (en) | 2019-11-22 | 2021-05-18 | Caterpillar Inc. | Rocker arm assembly with air venting |
| CN110761869B (en) * | 2019-12-18 | 2020-12-22 | 潍柴动力股份有限公司 | Engine braking structure, engine braking system and engine |
| CN112065524B (en) * | 2020-09-11 | 2021-09-28 | 潍柴动力股份有限公司 | Rocker arm assembly and engine |
| CN117120708A (en) | 2021-03-25 | 2023-11-24 | Pac制动公司 | Compact engine brake with pressure controlled reset |
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| CN104975898A (en) | 2015-10-14 |
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