CN204386688U - The integrated rocker arm brake apparatus of mechanically joined motor reset is risen with valve - Google Patents
The integrated rocker arm brake apparatus of mechanically joined motor reset is risen with valve Download PDFInfo
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- CN204386688U CN204386688U CN201420838039.6U CN201420838039U CN204386688U CN 204386688 U CN204386688 U CN 204386688U CN 201420838039 U CN201420838039 U CN 201420838039U CN 204386688 U CN204386688 U CN 204386688U
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Abstract
The utility model belongs to auxiliary brake device for automobile technical field, refer in particular to a kind of integrated rocker arm brake apparatus of mechanically joined motor rising replacement with valve, one end of rocking arm is provided with roller by pin, roller contacts with exhaust cam and connects, the other end of rocking arm is provided with arrestment mechanism, arrestment mechanism controls the action of exhaust valve bridge, rocking arm between arrestment mechanism and pitman arm shaft is provided with control mechanism, pitman arm shaft is provided with braking oil duct, exhaust cam rotating band shakes arm and swings around pitman arm shaft, coordinate the action of solenoid-driven control mechanism and arrestment mechanism and then control the action of exhaust valve bridge, the utility model has valve and rises replacement and valve clearance adjustment function, further improve the layout of control mechanism and arrestment mechanism, optimize valve and rise the integrated of replacement, structure is compacter, thus eliminate and reduce above-mentioned unfavorable factor in engine braking process, make braking process more reliable.
Description
Technical field:
The utility model belongs to auxiliary brake device for automobile technical field, refers in particular to a kind of integrated rocker arm brake apparatus of mechanically joined motor rising replacement with valve.
Background technique:
Along with the sustainable development of domestic economy situation and the quick construction of expressway, take automobile as the important component part that the logistics transportation of main traffic instrument had become national economy already.Under the impetus of science and technology, truck is day by day to heavy-duty, speed up development, and traditional mechanical friction type break can't bear the heavy load at work, usually loses efficacy because friction disc wear is serious and brake hub temperature is too high, traffic accident is caused to take place frequently, harm personal safety.In this case, there is efficient, continual and steady retardative property and the engine brake without material consumption, be subject to extensive concern, and progressively apply.And in the end of the year 2012, national appropriate authority has also been put into effect on the truck of regulation mandatory requirement more than 12 tons and large commercial passenger vehicle and has been set up retarding braking device.
In the prior art, engine braking technology is widely known by the people.A precedent of engine braking apparatus is the hydraulic engine break disclosed in nineteen sixty-five at U.S. Patent number 3220392 by comings (Cummins).Machinery input is delivered to the exhaust valve that will open through oil hydraulic circuit by the engine brake in this technology.Above-mentioned engine braking process motor is temporarily converted to compressor just can realize engine braking.Fuel oil is cut off in transfer process, exhaust valve is opened at the end of engine piston compresses stroke is close, allow to be discharged by pressurized gas (being air during braking), the energy that motor pressurized gas in compression stroke absorbs, engine piston can not be turned back at expansion stroke subsequently, but be dissipated by the exhaust of motor and radiation system.The effective engine braking of final realization, slows down the speed of vehicle.
The engine compression brake mode of present main flow mainly contains following several:
1, as the engine braking apparatus of early stage comings, be a kind of overhead annex on the engine, increase a little valve on the engine, be responsible for engine braking specially.In order to install this type of engine brake, to packing ring be added between cylinder and valve gap, increasing the height of motor, weight and cost extraly;
2, within 1974, (JVS) company a kind of integrated form rocker arm-braking device disclosed in No. 3809033rd, patent can all be won by the U.S..This braking device increases a hydraulic system by electromagnetic valve controls exhaust valve unlatching to form hydraulic chain on the engine, thus realize engine braking function, the shortcoming of this structure is that pressure-bearing oil is in enclosed cavity always in long-term braking process, because high pressure is revealed, the continuous braking effect of break can be affected, and its additional volumes is comparatively large, and manufacture cost is relatively high;
3, engine braking apparatus is integrated among conventional exhaust rocking arm, engine braking is realized by setting up detent bumps on original cam, this structure is comparatively compact, lightweight, and the basis that can realize engine braking reduces the weight and volume of complete machine widely.
But with regard in the developmental research of this integrated form rocker arm system, also there is many deficiencys at present.As calendar year 2001 U.S. mark (Mack) truck company discloses another integrated form rocker arm-braking device No. 6234143rd, patent, it has set up again exhaust gas recirculatioon (EGR) boss in original cam mechanism, add air valve bridge, but only open an exhaust valve when braking, valve bridge and rocking arm also exist asymmtric load; Calendar year 2001, comings (Cummins) Engine Company disclosed a kind of integrated form rocker arm-braking system rising reset mechanism with valve No. 6253730th, U. S. Patent, opened the non-symmetrical load problem that single valve causes when solving above-mentioned braking.But the time of replacement is too short, replacement is highly too little, cannot normally work when motor height rotating speed; Application number disclosed in Saic Chery Automobile Co., Ltd is a kind of engine braking apparatus of 200810024409.2, although this engine braking apparatus is easy to control, needs to increase extra cam switching device, manufacture and assembly cost relatively high.
Summary of the invention:
The purpose of this utility model is to provide that a kind of structure is compacter, applicability extensively, the band valve of the Stability and veracity that improves engine braking rises the integrated rocker arm brake apparatus of mechanically joined motor reset.
The utility model is achieved in that
The integrated rocker arm brake apparatus of mechanically joined motor reset is risen with valve, rocking arm is arranged on pitman arm shaft, one end of rocking arm is provided with roller by pin, roller contacts with exhaust cam and connects, the other end of rocking arm is provided with arrestment mechanism, the below of arrestment mechanism is provided with exhaust valve bridge, arrestment mechanism controls the action of exhaust valve bridge, rocking arm between arrestment mechanism and pitman arm shaft is provided with control mechanism, pitman arm shaft is provided with braking oil duct, rocking arm is provided with the first braking oil duct being communicated with control mechanism, and connection control mechanism, second braking oil duct of arrestment mechanism, the braking oil duct and first of pitman arm shaft is braked oil duct and is communicated with, first braking oil duct and second is braked and to be communicated with by control mechanism between oil duct or to block, exhaust cam rotating band shakes arm and swings around pitman arm shaft, coordinate the action of solenoid-driven control mechanism and arrestment mechanism and then control the action of exhaust valve bridge,
The concrete structure of described control mechanism is: include control fuel tap plunger, control fuel tap plunger is arranged in the blind hole on rocking arm by spring sheet, this blind hole is between pitman arm shaft and arrestment mechanism, described control fuel tap plunger can move up and down in blind hole, and the cylinder on the top of control fuel tap plunger is provided with annular groove; In rocking arm, be provided with the middle part oilhole of the first braking oil duct, connection arrestment mechanism and the blind hole connecting the oilhole on blind hole top and the braking oil duct of pitman arm shaft second brakes oil duct, rocking arm is provided with and is communicated with blind hole and extraneous oil leak hole, control fuel tap plunger is in top off position by spring sheet active force in normal state, the oilhole on plane shutoff blind hole top on this time control fuel tap plunger, namely block the first braking oil duct, the oilhole in the middle part of blind hole is in coupled condition by the annular groove on plunger and oil leak hole; Solenoid valve is opened, in the braking oil duct of hydraulic oil input pitman arm shaft, control fuel tap plunger moves down by oil pressure effect compression spring leaf, be in lower inoperative position, the face shutoff of oil leak hole controlled oil valve plunger Upper cylindrical, the oilhole of oilhole rapidly to middle part now by blind hole top is oil-filled, sets up brake circuit, the cylinder body of the below of control fuel tap plunger is provided with and resets pin.
Above-mentioned exhaust valve bridge includes the air valve bridge be arranged on below rocking arm, and air valve bridge is provided with adjustment bolt by nut, and the adjustment bolt coat between air valve bridge and rocking arm is equipped with supported spring, adjustment bolt and arrestment mechanism interoperation.
Above-mentioned pitman arm shaft is provided with oil leab, rocking arm is provided with the first oil leab being communicated with oil leab and pin, the second oil leab being communicated with arrestment mechanism, the oil leab of pitman arm shaft, the first oil leab, the second oil leab are communicated with.
The concrete structure of above-mentioned arrestment mechanism is: include columniform brake silpper, brake silpper is installed in the brake piston chamber of rocking arm end, the outer end of brake silpper, by spring sheet and fixing bolt location, is braked oil duct by second between brake piston chamber and the middle part oilhole of the blind hole of control mechanism and is connected; The external cylindrical surface of brake silpper is provided with stair-step, and stair-step is arranged downwards, forms normal working plane and braking operation plane; Under normal state, brake silpper is in the off position of left part by spring sheet active force, and now the adjustment bolt of normal working plane and exhaust valve bridge forms compensate for clearance L; Solenoid valve is opened, in the braking oil duct of hydraulic oil input pitman arm shaft, after first and second braking oil duct, oil pressure promotes brake silpper compression spring leaf and is in right part operating position, and braking operation plane contacts with the adjustment bolt of exhaust valve bridge, form mechanical connection, eliminate gap L.
The concrete structure of above-mentioned arrestment mechanism is: comprise brake silpper and brake piston, brake silpper and brake piston are arranged on rocking arm respectively by spring sheet, the external cylindrical surface of brake silpper is provided with curvilinear groove, groove is arranged down, the top of brake piston is provided with the projection of arc-shaped, groove matches with projection, brake piston is made to be easy to slide in groove and skid off, during off position, brake piston contacts by groove spring sheet active force moving same brake silpper, and bottom is L apart from the adjustment bolt upper gap of exhaust valve bridge; During operating position, brake silpper compression spring leaf moves to right, and promotes brake piston simultaneously and moves down disengaging groove location and same circumference contact, make up gap L.
Above-mentioned brake silpper inside is provided with radial direction and runs through oil duct and axial oil duct formation T-shaped oil duct, the outer end that oil duct is communicated with, the other end runs through brake silpper is run through with radial direction in one end of axial oil duct, T-shaped oil duct is used for lubrication when brake silpper and brake piston motion, and this T-shaped oil duct is by the lubricating oil duct fuel feeding on rocking arm.
The outer end of above-mentioned brake silpper is provided with a spacing square, and spacing square is fastened on spring sheet to prevent the rotation of brake silpper in brake piston chamber.
Above-mentioned solenoid valve is arranged on pitman arm shaft, and pitman arm shaft is fixed on cylinder body, and electromagnetic valve enters the opening and closing of the braking oil duct in pitman arm shaft.
Above-mentioned exhaust cam is provided with normal exhaust projection, compression-release type detent bumps and braking recirculation protruding.
The advantage that the utility model is given prominence to compared to existing technology is:
1, the whole braking device of the utility model is integrated in existing rocking arm, simplify engine braking apparatus, shorten brake circuit stroke, compact structure cost is low, and applicability is extensive, can be used for two and enters a row, two exhaust valves entering two row's forms, simultaneously owing to being that the mechanical contact of cylindrical slider also directly opens exhaust valve, eliminate the adverse effect by hydraulic compression and temperature, turbidity test, pressure, air content etc., greatly improve the Stability and veracity of engine braking.
2, the utility model has the replacement of valve liter and valve clearance adjustment function, further improve the layout of control mechanism and arrestment mechanism, optimize valve and rise the integrated of replacement, structure is compacter, thus eliminate and reduce above-mentioned unfavorable factor in engine braking process, make braking process more reliable.
Accompanying drawing illustrates:
Fig. 1 is the generalized section that integrated rocking arm of the present utility model comprises control mechanism and arrestment mechanism;
Fig. 2 is the schematic perspective view of brake silpper of the present utility model;
Fig. 3 is the plan view of brake silpper of the present utility model;
Fig. 4 is the plan view of brake silpper of the present utility model;
Fig. 5 is the schematic diagram of the another kind of arrestment mechanism of the utility model;
Fig. 6 is the schematic perspective view of the brake silpper in another kind of arrestment mechanism of the present utility model;
Fig. 7 is the plan view of the brake silpper in another kind of arrestment mechanism of the present utility model;
Fig. 8 is the plan view of the brake silpper in another kind of arrestment mechanism of the present utility model.
Embodiment:
With specific embodiment, the utility model is further described below,
Embodiment 1: see Fig. 1-4:
The integrated rocker arm brake apparatus of mechanically joined motor reset is risen with valve, rocking arm 1 is arranged on pitman arm shaft 2, one end of rocking arm 1 is provided with roller 4 by pin 3, pin 3 is copper pin, roller 4 contacts with exhaust cam 5 and connects, the other end of rocking arm 1 is provided with arrestment mechanism 6, the below of arrestment mechanism 6 is provided with exhaust valve bridge 7, arrestment mechanism 6 controls the action of exhaust valve bridge 7, rocking arm 1 between arrestment mechanism 6 and pitman arm shaft 2 is provided with control mechanism 12, described pitman arm shaft 2 is provided with the braking oil duct 13 be connected with oil pump, by the input of solenoid valve SC sigmal control power oil, rocking arm 1 is provided with the first braking oil duct 14 being communicated with control mechanism, and be communicated with control mechanism 12, second braking oil duct 15 of arrestment mechanism 6, braking oil duct 13 and first is braked oil duct 14 and is communicated with, first braking oil duct 14 and second is braked and to be communicated with by control mechanism 12 between oil duct 15 or to block, exhaust cam 5 rotating band shakes arm 1 and swings around pitman arm shaft 2, coordinate the action of solenoid valve signal drived control mechanism 12 and arrestment mechanism 6 and then control the action of exhaust valve bridge 7.
Above-mentioned exhaust valve bridge 7 includes the air valve bridge 8 be arranged on below rocking arm 1, air valve bridge 8 is provided with adjustment bolt 10 by nut 9, supported spring 11 is set with outside adjustment bolt 10 between air valve bridge 8 and rocking arm 1, when supported spring 11 is to prevent from moving, rocking arm 1 departs from exhaust valve bridge 7, reduce impact force and noise, adjustment bolt 10 and arrestment mechanism 6 interoperation.
Above-mentioned pitman arm shaft 2 is provided with oil leab 31, rocking arm 1 is provided with the first oil leab 39, connection arrestment mechanism 6 and the second oil leab 32 that are communicated with oil leab 31 and pin 3, and oil leab 31, first oil leab 39, second oil leab 32 on pitman arm shaft 2 is communicated with.One end of second oil leab 32 is in communication with the outside, and connection end is provided with plug.
The concrete structure of above-mentioned control mechanism 12 is: include control fuel tap plunger 16, control fuel tap plunger 16 is arranged in the blind hole on rocking arm 1 by spring sheet 17, spring sheet 17 is provided with through hole, the lower end of control fuel tap plunger 16 is arranged in through hole, the other end of spring sheet 17 is fixed by screws on rocking arm 1, this blind hole is between pitman arm shaft 2 and arrestment mechanism 6, described control fuel tap plunger 16 can move up and down in blind hole, and the cylinder on the top of control fuel tap plunger 16 is provided with annular groove 18; In rocking arm 1, be provided with the middle part oilhole of the first braking oil duct 14, connection arrestment mechanism 6 and the blind hole connecting the oilhole on blind hole top and the braking oil duct 13 of pitman arm shaft 2 second brakes oil duct 15, rocking arm 1 is provided with and is communicated with blind hole and extraneous oil leak hole 19, control fuel tap plunger 16 is in top off position by spring sheet 17 active force in normal state, the oilhole on plane shutoff blind hole top on this time control fuel tap plunger 16, namely block the first braking oil duct 14, the oilhole in the middle part of blind hole is in coupled condition by the annular groove 18 on plunger 16 with oil leak hole 19; Solenoid valve is opened, in the braking oil duct 13 of hydraulic oil input pitman arm shaft 2, and enter the first braking oil duct 14 from braking oil duct 13, control fuel tap plunger 16 moves down by oil pressure effect compression spring leaf 17, be in lower inoperative position, the face shutoff of oil leak hole 19 controlled oil valve plunger 16 Upper cylindrical, the oilhole of oilhole rapidly to middle part now by blind hole top is oil-filled, set up brake circuit, the cylinder body below control fuel tap plunger 16 is arranged at intervals with and resets pin 20.
The concrete structure of above-mentioned arrestment mechanism 6 is: include columniform brake silpper 21, brake silpper 21 is installed in the brake piston chamber 22 of rocking arm 1 end, the outer end of brake silpper 21 is located by spring sheet 23 and fixing bolt 24, brakes oil duct 15 be connected between brake piston chamber 22 and the middle part oilhole of the blind hole of control mechanism 12 by second; The external cylindrical surface of brake silpper 21 is provided with stair-step, and stair-step is arranged downwards, forms normal working plane 25 and braking operation plane 26; Rocking arm 1 is provided with the through hole be communicated with brake piston chamber 22, one end of the adjustment bolt 10 of exhaust valve bridge 7 is arranged in through hole, under normal state, brake silpper 21 is in the off position of left part by spring sheet 23 active force, and now normal working plane 25 forms compensate for clearance L with adjustment bolt 10; Solenoid valve is opened, in the braking oil duct 13 of hydraulic oil input pitman arm shaft 2, and enter the second braking oil duct 15 by the first braking oil duct 14, control mechanism 12, oil pressure promotes brake silpper 21 compression spring leaf 23 and is in right part operating position, braking operation plane 26 contacts with the adjustment bolt 10 of exhaust valve bridge 7, form mechanical connection, eliminate gap L.
Containing gap adjustment function in described arrestment mechanism 6, according to the size of exhaust cam 5 lift, optionally exhaust valve be can open in advance, thus normal exhaust and braking degassing function realized.Under normal state, brake silpper 21 is in the off position of left part by spring sheet 23 active force, now normal working plane 25 forms compensate for clearance L with adjustment bolt 10, its compensate for clearance amount is the summation of detent bumps lift and emission valve clearance, and this gap width is less than the lift of normal exhaust cam 5.This adjustment bolt 10 is fixed on air valve bridge 8 by nut 9, adjusts this compensate for clearance value by adjustment bolt 10 and nut 9; When receiving solenoid valve brake signal, oil pressure promotes brake silpper 21 compression spring leaf 23 and is in right part operating position, braking operation plane 26 contacts with adjustment bolt 10, form mechanical connection, eliminate gap L, now brake silpper 21 opens exhaust valve exhaust by the adjusting bolt 10 on contact exhaust valve bridge 8.
The outer end of above-mentioned brake silpper 21 is provided with a spacing square 27, and spacing square 27 is located on spring sheet 23 to prevent the rotation of brake silpper 21 in brake piston chamber 22.
Above-mentioned solenoid valve is arranged on pitman arm shaft 2, and pitman arm shaft 2 is fixed on cylinder body, and electromagnetic valve enters the opening and closing of braking oil duct 13 in pitman arm shaft 2.
The cam mechanism that exhaust cam 5 of the present utility model uses a kind of height integrated, the basis of original normal exhaust projection 28 is set up again BGR (Brake Gas Recirculation) protruding, namely compression-release type detent bumps 29 and CR (Compression-Release) projection, namely brake recirculation projection 30.When braking recirculation projection 30 acts on aspirating stroke after IC Intake Valve Closes, and continue for some time after compression journey starts, braking recirculation projection 30 needs to coordinate exhaust register and turbosupercharger to use together; Compression-release type detent bumps 29 action, before compression stroke terminates, ends at after expansion stroke starts.
Oil leab 31, first oil leab 39, second oil leab 32 of the present utility model is in opening state all the time, first oil leab 39 is connected the lubrication be used for when roller 3 moves with pin 3, second oil leab 32 is connected with the brake piston chamber 22 of arrestment mechanism 6, lubrication when moving for brake silpper 21 and touch adjusting bolt 10.
Braking oil duct of the present utility model and oil leab define the liquid networking of whole system.
Working principle of the present utility model:
When engine work, solenoid valve is in the state of blocking, and on pitman arm shaft 2, brake oil duct 13 without fluid and input, namely brake silpper 21 is in off position.Now when exhaust cam 5 turns to compression-release type detent bumps 29 and braking recirculation projection 30, because preset clearance value L in arrestment mechanism 6 just in time equals the summation of compression-release type detent bumps 29 or protruding 30 lifts of braking recirculation and emission valve clearance, therefore the lift that compression-release type detent bumps 29 and braking recirculation protruding 30 produce is not enough to make up this preset clearance, so can not open exhaust valve to realize degassing function.This preset clearance role that Here it is.When exhaust cam 5 rotate to normal exhaust protruding 28 time, now valve rises comparatively large, also has enough valve rising amount to make exhaust valve 8 that action occur after supplying reserved valve clearance, thus opens exhaust valve 8 and realize normal exhaust action.
When needs carry out motor auxiliary braking, the solenoid valve on pitman arm shaft 2 is in opening state, and motor is started to the blind hole fuel feeding residing for the control mechanism 12 in rocking arm 1 by the first braking oil duct 14 on the braking oil duct 13 on pitman arm shaft 2 and rocking arm 1.Control fuel tap plunger 16 is by the downward movement of oil pressure effect compression spring leaf 17, be in operating position, thus the first braking oil duct 14 and second is braked oil duct 15 and is communicated with, oil pressure promotes brake silpper 21 compression spring leaf 23 and is in operating position, now braking operation plane 26 is touched with flat face in adjusting bolt 10, eliminates gap L.Now when exhaust cam 5 turns to compression-release type detent bumps 29 and braking recirculation projection 30, because brake silpper 21 and adjusting bolt 10 form mechanical connection, the lift that compression-release type detent bumps 29 and braking recirculation projection 30 produce can act in adjusting bolt 10 in proportion, and touches valve bridge mechanism 7 and open exhaust valve 8 in advance to realize braking function.
After compression-release type detent bumps 29 lift terminates, exhaust cam 5 is rotated further and close to normal exhaust projection 28, the amplitude that rocking arm 1 rotates is larger, the lift produced also increases thereupon, until contact the replacement pin 20 on cylinder body bottom control fuel tap plunger 16, both active forces promote control fuel tap plunger 16 and move upward and block plane in residing blind hole, close the connection that the first braking oil duct 14 and second brakes oil duct 15, and open the connection of the second braking oil duct 15 and oil leak hole 19, thus the fluid remained in the second braking oil duct 15 and brake piston chamber 22 is discharged, brake silpper 21 returns to off position by spring sheet 23 restoring force, the mechanical connection that this place is formed is removed, gap L is recovered again.A braking cycle completes.If do not remove engine braking order, then engine braking cycles can proceed along with the running of motor.
At the end of motor auxiliary braking, shut electromagnetic valve, high pressure oil no longer enters the braking oil duct 13 in pitman arm shaft 2, control fuel tap plunger 16 is in off position under spring sheet 17 active force, keep the oilhole blocking blind hole top, isolation first braking oil duct 14 and the second braking oil duct 15, and connection oil duct second brakes oil duct 15 and oil leak hole 19, keeps draining state.Now motor recovers normal operation.
Embodiment 2: see Fig. 5-8:
The present embodiment is the different of arrestment mechanism from the difference of embodiment 1:
The concrete structure of arrestment mechanism 6 is: comprise brake silpper 31 and brake piston 32, the axis of brake silpper 31 and brake piston 32 is mutually vertical, brake silpper 31 and brake piston 32 are respectively by spring sheet 33, 34 are arranged on rocking arm 1, the external cylindrical surface of brake silpper 31 is provided with curvilinear groove 35, the top of brake piston 32 is provided with the projection 36 of arc-shaped, groove 35 matches with protruding 36, brake piston 32 is made to be easy to slide in groove 35 and skid off, described brake silpper 31 inside is provided with radial direction and runs through oil duct and axial oil duct formation T-shaped oil duct 37, one end of axial oil duct is run through oil duct with radial direction and is communicated with, the other end runs through the outer end of brake silpper 31, lubrication when T-shaped oil duct 37 moves for brake silpper 31 and brake piston 32, this T-shaped oil duct 37 is by lubricating oil duct 32 fuel feeding on rocking arm 1.During off position, brake piston 32 contacts by the groove 35 spring sheet 33 active force moving same brake silpper 31, and bottom is L apart from adjustment bolt upper gap; During operating position, brake silpper 31 compression spring leaf 33 moves to right, and promotes brake piston 32 simultaneously and moves down disengaging groove 35 position and same circumference contact, make up gap L.The principle of its normally work and braking operation, with aforementioned consistent, repeats no more.
The outer end of above-mentioned brake silpper 31 is provided with a spacing square 38, and spacing square 38 is fastened on spring sheet 33 to prevent the rotation of brake silpper 31 in brake piston chamber 22.
Above-described embodiment is only one of preferred embodiment of the present utility model; not limit practical range of the present utility model with this; therefore: all equivalence changes done according to shape of the present utility model, structure, principle, all should be covered by within protection domain of the present utility model.
Claims (9)
1. be with valve to rise the integrated rocker arm brake apparatus of mechanically joined motor reset, it is characterized in that: rocking arm is arranged on pitman arm shaft, one end of rocking arm is provided with roller by pin, roller contacts with exhaust cam and connects, the other end of rocking arm is provided with arrestment mechanism, the below of arrestment mechanism is provided with exhaust valve bridge, arrestment mechanism controls the action of exhaust valve bridge, rocking arm between arrestment mechanism and pitman arm shaft is provided with control mechanism, pitman arm shaft is provided with braking oil duct, rocking arm is provided with the first braking oil duct being communicated with control mechanism, and connection control mechanism, second braking oil duct of arrestment mechanism, the braking oil duct and first of pitman arm shaft is braked oil duct and is communicated with, first braking oil duct and second is braked and to be communicated with by control mechanism between oil duct or to block, exhaust cam rotating band shakes arm and swings around pitman arm shaft, coordinate the action of solenoid-driven control mechanism and arrestment mechanism and then control the action of exhaust valve bridge,
The concrete structure of described control mechanism is: include control fuel tap plunger, control fuel tap plunger is arranged in the blind hole on rocking arm by spring sheet, this blind hole is between pitman arm shaft and arrestment mechanism, described control fuel tap plunger can move up and down in blind hole, and the cylinder on the top of control fuel tap plunger is provided with annular groove; In rocking arm, be provided with the middle part oilhole of the first braking oil duct, connection arrestment mechanism and the blind hole connecting the oilhole on blind hole top and the braking oil duct of pitman arm shaft second brakes oil duct, rocking arm is provided with and is communicated with blind hole and extraneous oil leak hole, control fuel tap plunger is in top off position by spring sheet active force in normal state, the oilhole on plane shutoff blind hole top on this time control fuel tap plunger, namely block the first braking oil duct, the oilhole in the middle part of blind hole is in coupled condition by the annular groove on plunger and oil leak hole; Solenoid valve is opened, in the braking oil duct of hydraulic oil input pitman arm shaft, control fuel tap plunger moves down by oil pressure effect compression spring leaf, be in lower inoperative position, the face shutoff of oil leak hole controlled oil valve plunger Upper cylindrical, the oilhole of oilhole rapidly to middle part now by blind hole top is oil-filled, sets up brake circuit, the cylinder body of the below of control fuel tap plunger is provided with and resets pin.
2. band valve according to claim 1 rises the integrated rocker arm brake apparatus of mechanically joined motor reset, it is characterized in that: described exhaust valve bridge includes the air valve bridge be arranged on below rocking arm, air valve bridge is provided with adjustment bolt by nut, adjustment bolt coat between air valve bridge and rocking arm is equipped with supported spring, adjustment bolt and arrestment mechanism interoperation.
3. band valve according to claim 1 rises the integrated rocker arm brake apparatus of mechanically joined motor reset, it is characterized in that: described pitman arm shaft is provided with oil leab, rocking arm is provided with the first oil leab being communicated with oil leab and pin, the second oil leab being communicated with arrestment mechanism, and the oil leab on pitman arm shaft, the first oil leab, the second oil leab are communicated with.
4. band valve according to claim 1 and 2 rises the integrated rocker arm brake apparatus of mechanically joined motor reset, it is characterized in that: the concrete structure of described arrestment mechanism is: include columniform brake silpper, brake silpper is installed in the brake piston chamber of rocking arm end, the outer end of brake silpper by spring sheet and fixing bolt location, brake piston chamber with brake oil duct by second between control mechanism and be connected; The external cylindrical surface of brake silpper is provided with stair-step, and stair-step is arranged downwards, forms normal working plane and braking operation plane; Under normal state, brake silpper is in the off position of left part by spring sheet active force, and now the adjustment bolt of normal working plane and exhaust valve bridge forms compensate for clearance L; Solenoid valve is opened, in the braking oil duct of hydraulic oil input pitman arm shaft, after first and second braking oil duct, oil pressure promotes brake silpper compression spring leaf and is in right part operating position, and braking operation plane contacts with the adjustment bolt of exhaust valve bridge, form mechanical connection, eliminate gap L.
5. band valve according to claim 1 and 2 rises the integrated rocker arm brake apparatus of mechanically joined motor reset, it is characterized in that: the concrete structure of described arrestment mechanism is: comprise brake silpper and brake piston, brake silpper and brake piston are arranged on rocking arm respectively by spring sheet, the external cylindrical surface of brake silpper is provided with curvilinear groove, groove is arranged down, the top of brake piston is provided with the projection of arc-shaped, groove matches with projection, brake piston is made to be easy to slide in groove and skid off, during off position, brake piston contacts by groove spring sheet active force moving same brake silpper, bottom is L apart from the adjustment bolt upper gap of exhaust valve bridge, during operating position, brake silpper compression spring leaf moves to right, and promotes brake piston simultaneously and moves down disengaging groove location and same circumference contact, make up gap L.
6. band valve according to claim 5 rises the integrated rocker arm brake apparatus of mechanically joined motor reset, it is characterized in that: described brake silpper inside is provided with radial direction and runs through oil duct and axial oil duct formation T-shaped oil duct, the outer end that oil duct is communicated with, the other end runs through brake silpper is run through with radial direction in one end of axial oil duct, T-shaped oil duct is used for lubrication when brake silpper and brake piston motion, and this T-shaped oil duct is by the lubricating oil duct fuel feeding on rocking arm.
7. band valve according to claim 6 rises the integrated rocker arm brake apparatus of mechanically joined motor reset, it is characterized in that: the outer end of described brake silpper is provided with a spacing square, spacing square is fastened on spring sheet to prevent the rotation of brake silpper in brake piston chamber.
8. band valve according to claim 1 rises the integrated rocker arm brake apparatus of mechanically joined motor reset, it is characterized in that: described solenoid valve is arranged on pitman arm shaft; pitman arm shaft is fixed on cylinder body, electromagnetic valve enters in pitman arm shaft the opening and closing of braking oil duct.
9. band valve according to claim 1 rises the integrated rocker arm brake apparatus of mechanically joined motor reset, and it is characterized in that: described exhaust cam is provided with normal exhaust projection, compression-release type detent bumps and braking recirculation protruding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420838039.6U CN204386688U (en) | 2014-12-25 | 2014-12-25 | The integrated rocker arm brake apparatus of mechanically joined motor reset is risen with valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420838039.6U CN204386688U (en) | 2014-12-25 | 2014-12-25 | The integrated rocker arm brake apparatus of mechanically joined motor reset is risen with valve |
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| CN204386688U true CN204386688U (en) | 2015-06-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481628A (en) * | 2014-12-25 | 2015-04-01 | 浙江康和机械科技有限公司 | Mechanical connection type engine integration rocker arm brake device with valve lift reset function |
| CN106089348A (en) * | 2016-08-23 | 2016-11-09 | 潍柴动力股份有限公司 | A kind of air valve bridge and include the electromotor of this air valve bridge |
| CN106382140A (en) * | 2016-10-21 | 2017-02-08 | 东风商用车有限公司 | Engine brake control oil line structure |
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