CN202194698U - Fixed chain type composite rocker arm brake device - Google Patents
Fixed chain type composite rocker arm brake device Download PDFInfo
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- CN202194698U CN202194698U CN 201120217282 CN201120217282U CN202194698U CN 202194698 U CN202194698 U CN 202194698U CN 201120217282 CN201120217282 CN 201120217282 CN 201120217282 U CN201120217282 U CN 201120217282U CN 202194698 U CN202194698 U CN 202194698U
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Abstract
A fixed chain type composite rocker arm brake device comprises a rocker arm, a brake driving mechanism, a connecting mechanism and a cam of an engine. The rocker arm is disposed between the cam and a valve, and the connecting mechanism is arranged between the rocker arm and the valve. The connecting mechanism is provided with a first position and a second position relative to the rocker arm. The brake driving mechanism is provided with a non-operation position and an operation position. At the operation position, the brake driving mechanism drives the connecting mechanism to reach the second position and form rigid mechanical link between the connecting mechanism and the rocker arm. Motion of the cam is transmitted to the valve through the rigid mechanical link, and braking operation of the engine is generated. At the non-operation position, the brake driving mechanism removes the rigid mechanical link, and the brake driving mechanism is separated from normal operation of the engine. By enabling the brake driving mechanism of the engine to be integrated in the rocker arm or the connecting mechanism, weight and height of the engine are reduced. By utilizing the rigid mechanical link to bear brake load of the engine, brake property of the engine is improved.
Description
Technical field
The utility model relates to mechanical field, relates in particular to the valve actuation field of vehicle motor, particularly the normal operation of motor is converted into the technology of the braking running of motor, and concrete is a kind of solid chain type duplicated crank braking device.
Background technique
In the prior art, the engine braking technology is widely known by the people.Temporarily convert motor into compressor and just can realize engine braking.In transfer process, cut off fuel oil; When the approaching end of engine piston compression stroke, open exhaust valve; Allowing to be compressed gas (being air during braking) discharges; The motor energy that pressurized gas absorbed in compression stroke can not turn back to engine piston at expansion stroke subsequently, but dissipate through the exhaust and the radiation system of motor.Final result is effective engine braking, slows down the speed of vehicle.
A precedent of engine braking apparatus be by comings (Cummins) in nineteen sixty-five at U.S. Patent number 3,220, the 392 hydraulic engine breaks that disclose.Engine brake in this technology is delivered to the exhaust valve that will open through oil hydraulic circuit with the machinery input.Be usually included in reciprocating main piston in the master piston bore on the oil hydraulic circuit, this to-and-fro motion comes from the Engine Mechanical input, such as the motion of the motion of motor injection cam or adjacent exhaust cam.The hydraulic fluid that moves through of main piston is delivered to the sub-piston on the oil hydraulic circuit, makes its to-and-fro motion in slave piston bore, and sub-piston acts on the exhaust valve directly or indirectly, produces the valve motion of engine braking running.
The engine braking apparatus of comings is the annex of overhead on motor.For this type of engine brake is installed, between cylinder and valve gap, to add packing ring, therefore, increase height, weight and the cost of motor extraly.Obviously, solution of the above problems is that the parts with braking device are integrated in the existing parts of motor, as is integrated in the rocking arm of motor, forms the integrated form break.
Anderson (Jonsson) in nineteen sixty-eight at U. S. Patent the 3rd, 367, No. 312 a kind of integrated form compression-release engine braking system is disclosed; This braking system is integrated in the rocking arm of motor; In a plunger is arranged, or sub-piston is hydraulically locked in extended position in the rocking arm cylinder of rocking arm near exhaust valve one end; Give an exhaust valve (early stage every cylinder single valve motor) with the transmission of movement of cam, produce the engine braking running.The Anderson has also used a spring that plunger biasing in the cylinder outwards with contacting that exhaust valve keeps continuing, is made that cam-actuated rocking arm can both operations platoon's valve during with braking at power.In addition, the pressurized fluid that leads to the rocking arm cylinder is controlled by a control valve, thereby can optionally switch braking running and normal power running.
U.S. mark (Mack) truck company in 1974 in patent the 3rd, 786, No. 792 another kind of integrated form rocking arm break is disclosed.The brake piston of this braking system is hydraulically locked in extended position in the rocking arm cylinder near push rod one end, give an exhaust valve (early stage every cylinder single valve motor) with the transmission of movement of cam, produces the engine braking running.Cam is integrated in one with conventional boss and braking boss.The brake control valve mechanism of this braking system (combination of funnel-shaped plunger valve+non-return valve) is afterwards by extensive employing.
The U.S. all can win (JVS) company in 1974 in patent the 3rd, 809, No. 033 another kind of integrated form rocking arm break is disclosed.The brake piston of this braking system is placed in the rocking arm cylinder near valve bridge one end, can between non-braking position and application position, move.In application position, brake piston is hydraulically locked in extended position, gives the valve bridge with the transmission of movement of cam, opens two exhaust valves (every cylinder bivalve motor), produces the engine braking running.This braking system adopts two kinds of oil ducts that separate, and a kind of oil duct only is the break fuel feeding, and another kind is conventional engine lubrication oil duct.
Sweden's Volvo (Volvo) company in 1996 at U. S. Patent the 5th, 564, No. 385 a kind of integrated form rocking arm braking system that is used for the overhead-cam four-valve engine is disclosed.This braking system and the U.S. all can win (JVS) company in 1974 in patent the 3rd, 809, No. 033 disclosed integrated form rocking arm break is very close on structure and principle.The hydraulic braking piston is placed in the rocking arm cylinder near valve bridge one end, can between non-braking position and application position, move, in the inner gap that forms of motor air valve system.Pressure-bearing oil is supplied with brake piston through pressure controlled valve and is filled up the valve clearance in the rocking arm, forms the hydraulic pressure link.This engine braking system has adopted the combined mechanism of " funnel-shaped plunger valve+non-return valve ", has increased the overload pressure relief means thereon and has adopted single oil duct that the oil feeding mechanism of two oil pressure is provided.The low oil pressure of two oil pressure (being lower than the lubrication pressure of motor) is used for the lubricated of motor, and the high oil pressure of two oil pressure (equaling the lubrication pressure of motor) is used for the braking of motor.During braking, brake piston promotes the valve bridge, opens two air exhaust valve brakes simultaneously.
U.S. mark (Mack) truck company in calendar year 2001 in patent the 6th, 234, No. 143 another integrated form rocking arm break is disclosed.This braking system and its 1974 are in patent the 3rd, 786, and No. 792 disclosed patented technology is compared, and has than cataclysm.At first, conventional boss has increased exhaust gas recirculatioon (EGR) boss with the integrated form cam that the braking boss forms, and helps improving braking force.Secondly, the motor of every cylinder single valve has become every cylinder bivalve, has therefore increased valve bridge (air valve bridge or transverse arm).Also have, brake piston has moved on in the rocking arm piston hole of valve bridge one end from push rod one end, is positioned at exhaust valve (valve) top near pitman arm shaft.During braking, brake piston is opened an exhaust valve through braking jacking block or acting directly on the valve bridge.
The sword that all can win (JVS) receive visitor (Janak) and Metz Qu Ke (Meistrick) in 2008 at U. S. Patent the 7th, 392, No. 772 a kind of device that uses two rocking arms to open single valve braking is disclosed.Except the exhaust rocker arm of routine, also increased special-purpose brake rocker arm in its side.Brake piston and brake control valve have been increased in the conventional exhaust rocker arm.When needing braking, the brake piston in the conventional exhaust rocker arm moves on to the operating position that stretches out from the off position of withdrawal, links to each other with special-purpose brake rocker arm.Special-purpose brake cam drives special-purpose brake rocker arm, special-purpose brake rocker arm compressing brake piston, and brake piston promotes exhaust rocker arm again, opens an air exhaust valve brake below the exhaust rocker arm.
Above-mentioned engine braking apparatus all adopts hydraulic driving (crying the hydraulic pressure link again) to transmit engine braking load, and there is distortion in its load cell, and reliability is undesirable, has increased the weight and the height of motor simultaneously.
Summary of the invention
The purpose of the utility model is to provide a kind of solid chain type duplicated crank braking device, and engine braking apparatus adopts hydraulic driving to have the technical problem of load cell distortion, increase engine weight and height in the existing technology and described this solid chain type duplicated crank braking device will solve.
This solid chain type duplicated crank braking device of the utility model comprises the cam of motor; Also comprise rocking arm, braking drive organ and bindiny mechanism, be placed on the pitman arm shaft, wherein described rocking arm rotary type; Described rocking arm is arranged between the valve of described cam and motor; Described bindiny mechanism is arranged between the valve of rocking arm and motor, and bindiny mechanism has a primary importance and a second place with respect to rocking arm, is provided with the gap between the described primary importance and the second place; Braking drive organ contains an off position and an operating position; At described operating position, braking drive organ and the bindiny mechanism that is in the second place form a kind of rigid mechanical link between described cam and valve, and the described rigid mechanical link that moves through of cam passes to valve; The running of generation engine braking; At described off position, braking drive organ is removed the rigid mechanical link between cam and the valve, and braking drive organ separates with the normal operation of motor.
Further, also comprise at least one valve clearance controlling mechanism, described valve clearance controlling mechanism is regulated the off position of braking drive organ and the primary importance and the formed valve clearance of the second place of formed brake clearance of operating position and bindiny mechanism.
Further, described bindiny mechanism comprises a link, and described link is connected with rocking arm through a revolute pair.
Further, be provided with a cylindrical hole in the described link, described cylindrical hole and described pitman arm shaft constitute revolute pair, perhaps, are set with a straight pin on the rocking arm, and cylindrical hole and described straight pin constitute revolute pair.
Further, described rocking arm and link are placed on the same pitman arm shaft interlacedly.
Further, described braking drive organ is integrated in the described rocking arm.
Perhaps, described braking drive organ is integrated in the described bindiny mechanism.
Further, described braking drive organ is solid chain type load bearing mechanism, and described solid chain type load bearing mechanism forms mechanical linkages between cam and valve.
Further, described solid chain type load bearing mechanism is the elbow-bar mechanism of single toggle link, and the elbow-bar mechanism of described single toggle link comprises a toggle link, a locking bar piston and a brake piston; Described brake piston contains a retracted position and an extended position, and at the retracted position of brake piston, described toggle link is in heeling condition; Elbow-bar mechanism is in lax off position; At the extended position of brake piston, toggle link is in straight configuration, and elbow-bar mechanism is in the operating position of locking.
Further; Described solid chain type load bearing mechanism is the elbow-bar mechanism of duplex bar, and the elbow-bar mechanism of described duplex bar comprises two toggle links, two locking bar pistons and a brake piston, and described brake piston contains a retracted position and an extended position; Retracted position at brake piston; Described two toggle links are in heeling condition, and elbow-bar mechanism is in lax off position, at the extended position of brake piston; Two toggle links are in straight configuration, and elbow-bar mechanism is in the operating position of locking.
Further, described solid chain type duplicated crank braking device also comprises preloading spring, and described preloading spring is kept the primary importance and the formed gap of the second place of bindiny mechanism.
The working principle of the utility model is: when the needs engine braking; Just need motor when normal working is converted to the engine braking state; The braking control mechanism of motor is open-minded, and to the braking drive organ fuel feeding, braking drive organ becomes operating position from off position; Eliminate the gap that braking drive organ forms in the exhaust valve chain of motor; And through link forming a kind of the link between cam and the valve, give valve with the transmission of movement of cam, produce engine braking.When not needing engine braking, the braking control mechanism of motor cuts out, the braking drive organ emptying, and braking drive organ changes back to off position from operating position, in the exhaust valve chain of motor, forms the gap, separates with the normal operation of motor.
The utility model and prior art are compared, and its effect is actively with tangible.The utility model is integrated in the engine braking driving mechanism in rocking arm or the link; The weight and the height of motor have been reduced; Enlarge the application area of engine braking apparatus, utilized the rigid mechanical link to carry engine braking load, improved the braking ability of motor.
Description of drawings
Fig. 1 is first embodiment of the solid chain type duplicated crank braking device of the utility model is in the off-position at engine braking apparatus a schematic representation.
Fig. 2 is first embodiment of the solid chain type duplicated crank braking device of the utility model is in " opening " position at engine braking apparatus a schematic representation.
Fig. 3 is the schematic representation that the braking control mechanism of the solid chain type duplicated crank braking device of the utility model is in " opening " position.
Fig. 4 is the schematic representation that the braking control mechanism of the solid chain type duplicated crank braking device of the utility model is in the off-position.
Fig. 5 is a kind of schematic representation of cam profile of the solid chain type duplicated crank braking device of the utility model.
Fig. 6 is second embodiment of the solid chain type duplicated crank braking device of the utility model is in the off-position at engine braking apparatus a schematic representation.
Fig. 7 is the 3rd embodiment of the solid chain type duplicated crank braking device of the utility model is in the off-position at engine braking apparatus a schematic representation.
Fig. 8 is the 4th embodiment of the solid chain type duplicated crank braking device of the utility model is in the off-position at engine braking apparatus a schematic representation.
Fig. 9 is the 5th embodiment of the solid chain type duplicated crank braking device of the utility model is in the off-position at engine braking apparatus a schematic representation.
Embodiment
Embodiment 1
Fig. 1 and Fig. 2 have represented that respectively first embodiment of the solid chain type duplicated crank braking device of the utility model is in the position of " pass " and " opening " at engine braking apparatus.As depicted in figs. 1 and 2, comprise three chief components in the solid chain type duplicated crank braking device of the utility model: exhaust valve actuator 200, Exhaust valve mechanism 300 and engine braking driving mechanism 100.Exhaust valve actuator 200 lumps together with Exhaust valve mechanism 300 and is called the exhaust valve chain.
The conventional exhaust and braking dual functions of motor that cam 230 is integrated.An increasing boss 220 that is mainly used in the conventional exhaust running of motor is arranged on the interior basic circle 225 of cam 230, and it is bigger than the exhaust boss of conventional (not with engine braking) to strengthen boss 220, is integrated form exhaust boss again.The reason that strengthens is that cam 230 also has the braking boss (small boss 232 and small boss 233) that is used for engine braking.When motor conventional (igniting) running; In order to skip braking boss (small boss 232 and small boss 233); The bottom of strengthening boss 220 must increase and the transition portion of braking the about height such as grade of boss (small boss 232 and small boss 233), and its top is equivalent to conventional exhaust boss.Exhaust gas recirculatioon when small boss 232 is used to brake, the compression when 233 of small boss are used to brake discharges.
Because the brake clearance 130 between cam 230 and exhaust valve 301 is slightly greater than valve clearance 234, the braking drive organ 100 that is in off position as shown in Figure 1 separates with the normal operation of motor, does not bear any load, does not also transmit any motion.
When the needs engine braking, as shown in Figure 3, open braking control mechanism 50.The inlet of the axial oil duct 211 in control valve 51 and the pitman arm shaft 205 of braking control mechanism is connected, and through other braking oil supply gallery, like the interior radial hole 212 of pitman arm shaft 205, rocking arm 210 interior otch 213 and oil duct 214, to braking drive organ 100 fuel feeding.Oil pressure overcomes the active force of return spring 156; Locking bar piston 164 and locking bar piston 162 are upwards pushed away; Toggle link 184 is become from oblique position with toggle link 186 stretch position and locking (Fig. 2); Brake piston 160 is in extended position in rocking arm 210, the brake clearance 130 between releasing and the link 280.That is to say; Be in the braking drive organ 100 of operating position as shown in Figure 2; Between cam 230 and exhaust valve 301, form mechanical linkages through connector mechanism 250,, fill up 114 with resembling enough through the valve clearance controlling mechanism with the motion of cam 230; Pass to exhaust valve 301, produce the braking running of motor.
When not needing engine braking, as shown in Figure 4, close braking control mechanism 50, the valve body of control valve valve 51 is upwards closed oil-feed port 111, opens unloading port 222 simultaneously, and braking drive organ 100 is from brake fluid passage and unloading port's 222 emptyings.Locking bar piston 164 among Fig. 1 and Fig. 2 and locking bar piston 162 are under the effect that does not have oil pressure; Pushed away downwards by return spring 156; Toggle link 184 and toggle link 186 are biased in oblique position as shown in Figure 1; Brake piston 160 is withdrawn into non-braking position under the effect of brake spring 177, and forms a brake clearance 130 between the link 280.When the small boss of cam 230 232 and small boss 233 from interior basic circle 225 when rising, rocking arm 210 clockwise rotates.But because relative movement is only done between rocking arm 210 and the link 280 in the gap 234 between rocking arm 210 and the link 280, exhaust valve 310 keeps transfixion.That is to say; In non-braking state shown in Figure 1; The mechanical linkages that braking drive organ 100 forms between cam 230 and exhaust valve 301 through link 280 is switched or is removed; The motion of small boss 232 and small boss 233 can be delivered to exhaust valve 301 because gap 234 loses, and the braking running of motor is disengaged.
When cam 230 got into the ascent stage of braking boss (small boss 232 and small boss 233) being higher than of exhaust boss 220, the gap 234 between rocking arm 210 and the link 280 began to disappear, and rocking arm 210 directly drives link 280, opens exhaust valve 301.That is to say, to have only the transmission of movement supply and exhaust door 301 at exhaust boss 220 tops, produce the normal operation of motor in non-braking state shown in Figure 1.Because brake clearance 130 is slightly greater than gap 234, the brake piston 160 that in rocking arm 210, is in retracted mode does not contact with link 280, and braking drive organ 100 is not participated in the normal operation of motor.
Like Fig. 3 and shown in Figure 4, the braking control mechanism 50 of the solid chain type duplicated crank braking device of the utility model is in the position of " opening " and " pass ".Control valve 51 among the figure is a two-position three way type solenoid valve.When braking control mechanism 50 when opening (Fig. 3), the valve body of control valve 51 is opened oil-feed port 111 downwards, closes unloading port 222 simultaneously, the low-pressure oil of motor (lubricant oil) from the brake fluid channel flow to braking drive organ 100 (Fig. 1 and Fig. 2).When braking control mechanism 50 cuts out (Fig. 4); The valve body of control valve valve 51 is upwards closed oil-feed port 111; Open unloading port 222 simultaneously; The low-pressure oil of motor (lubricant oil) stops to flow to braking drive organ 100 (Fig. 1 and Fig. 2), and braking drive organ 100 is from brake fluid passage and unloading port's 222 emptyings.
Fig. 5 has shown a kind of cam profile in the solid chain type duplicated crank braking device of the utility model, comprising braking boss and integrated form exhaust boss 220.225 is the interior basic circle of cam.The braking boss comprises small boss 232 and small boss 233.Integrated form exhaust boss 220 is divided into bottom and top (double dot dash line among Fig. 5 separates them).The bottom of integrated form exhaust boss 220 is a transition portion, and is high near together with the braking boss; The top of integrated form exhaust boss 220 with not with the conventional boss of the motor of engine brake near identical.Like this; When non-braking (conventional igniting) running; The bottom of integrated form exhaust boss 220 is all skipped because of the inner gap 234 (Fig. 1 and Fig. 2) of exhaust valve chain together with the motion of braking boss (small boss 232 and small boss 233) or is lost, and can not pass to exhaust valve 301; Have only the motion at the top of integrated form exhaust boss 220 to be delivered to exhaust valve 301, it is moving to produce conventional valve elevator.
Embodiment 2
As shown in Figure 6, second embodiment's of the solid chain type duplicated crank braking device of the utility model engine braking apparatus is in the position of " pass ".A part that has only shown braking drive organ 100 among Fig. 6 is a kind of elbow-bar mechanism with single toggle link, comprises a toggle link 186, a locking bar piston 162 and a brake piston 160.In the position of " pass " shown in Figure 6, return spring 156 down pushes away locking bar piston 162, makes toggle link 186 be in oblique position, and brake piston 160 is in corresponding retracted position, and elbow-bar mechanism is in the off position that does not have locking.Spring 156 is fixed on the rocking arm 210 through spring seat 158 and snap ring 157.
When the needs engine braking, as shown in Figure 3, open braking control mechanism 50, through comprising oil duct 214 oil supply galleries such as grade in the rocking arm 210, braking drive organ 100 fuel feeding in Fig. 6.Oil pressure overcomes the active force of return spring 156, and locking bar piston 162 is upwards pushed away, and toggle link 186 is become from oblique position stretch position and locking; Brake piston 160 becomes extended position from retracted position in rocking arm 210; Between cam as depicted in figs. 1 and 2 230 and exhaust valve 301, form mechanical linkages,, fill up 114 with resembling enough through the valve clearance controlling mechanism with the motion of cam 230; Pass to exhaust valve 301, produce the braking running of motor.
Embodiment 3
As shown in Figure 7, the 3rd embodiment's of the solid chain type duplicated crank braking device of the utility model engine braking apparatus is in the position of " pass ".The valve clearance controlling mechanism of the exhaust valve of present embodiment directly is placed on the rocking arm 210.Be locked at valve clearance adjusting screw 110 on the rocking arm 210 by nut 105 and can regulate the valve clearance 234 between itself and the pressure ball bar 112.Pressure ball bar 112 can slide up and down in the hole of adjusting screw.Pressure ball bar 112 following with resemble foot pad 114 and be connected, link to each other with the link 280 of bindiny mechanism 250 above.Bindiny mechanism 250 also comprises the revolute pair that straight pin 284 and cylindrical hole 282 form.Compare with first embodiment, present embodiment has also increased braking valve clearance controlling mechanism, can regulate the brake clearance 130 between brake piston 160 and the link 180 by the valve clearance adjusting screw 1102 that nut 1052 is locked on the rocking arm 210.In addition, the preloading spring 198 of keeping valve clearance 234 is positioned at adjusting screw 110 (rocking arm 210) and resembles between the foot pad 114.
When the needs engine braking, as shown in Figure 3, open braking control mechanism 50, through comprising oil duct 214 oil supply galleries such as grade in the rocking arm 210, braking drive organ 100 fuel feeding in Fig. 7.Oil pressure overcomes the active force of return spring 156; Locking bar piston 164 and locking bar piston 162 are upwards pushed away; Toggle link 184 is become from oblique position with toggle link 186 stretch position and locking; Brake piston 160 is in extended position in rocking arm 210, elementary solution remove and link 280 between brake clearance 130.That is to say, be in the braking drive organ 100 of operating position, between cam 230 and exhaust valve 301, form mechanical linkages,, produce the braking running of motor the transmission of movement supply and exhaust door 301 of cam 230 through connector mechanism 250.
When not needing engine braking, as shown in Figure 4, close braking control mechanism 50 emptyings.Locking bar piston 164 among Fig. 7 and locking bar piston 162 are under the effect that does not have oil pressure; Pushed away downwards by return spring 156; Toggle link 184 and toggle link 186 are biased in oblique position as shown in Figure 7; Brake piston 160 is withdrawn into non-braking position under the effect of brake spring 177, and forms brake clearance 130 between the link 280.The mechanical linkages that braking drive organ 100 forms between cam 230 and exhaust valve 301 through link 280 is switched or is removed.When the braking boss of cam 230 (small boss 232 and small boss 233) from interior basic circle 225 when rising, rocking arm 210 clockwise rotates.But because valve clearance 234 between adjusting screw 110 and the pressure ball bar 112 and the brake clearance 130 between brake piston 160 and the link 280; Pressure ball bar 112 upwards moves in the hole of adjusting screw 110; The motion of braking boss (small boss 232 and small boss 233) is lost; Can not be delivered to exhaust valve 301, the braking running of motor is disengaged.Only after the shoulder of pressure ball bar 112 contacts the bottom surface of adjusting screw 110; Be higher than the motion at exhaust boss 220 tops of braking boss in the cam 230; With pressure ball bar 112 and resemble foot pad 114, be directly passed to exhaust valve through rocking arm 210, produce the outlet valve liter of the proper motion of motor.Brake piston 160 and the link 280 in the bindiny mechanism in the braking drive organ 100 do not bear any load, do not transmit any motion yet.Braking drive organ 100 separates with the normal operation of motor.
Embodiment 4
As shown in Figure 8, the 4th embodiment's of the solid chain type duplicated crank braking device of the utility model engine braking apparatus is in the position of " pass ".Unique difference of present embodiment and above-mentioned the 3rd embodiment is the position of braking drive organ in rocking arm 210, and both working principles are identical.
Embodiment 5:
As shown in Figure 9, the 5th embodiment and first embodiment of the solid chain type duplicated crank braking device of the utility model structurally have following difference:
1. rocking arm 210 is for being placed in " half rocking arm " above the pitman arm shaft 205;
2. the link 280 of bindiny mechanism 250 is for being placed in another " half rocking arm " above the pitman arm shaft 205, so " straight pin " of the revolute pair of bindiny mechanism 250 is pitman arm shaft 205;
3. the elbow-bar mechanism of the band duplex bar of braking drive organ 100 is integrated in the link 280.
Present embodiment is identical with first embodiment's working principle, no longer repeats at this.
Above-mentioned explanation has comprised concrete mode of execution, and this should not be regarded as the restriction to the utility model scope, but as some concrete illustrations of representing the utility model, many other differentiation all might therefrom produce.For instance, the solid chain type duplicated crank braking method and the device that show here are applicable to the motor of overhead camshaft type engine and push rod engine and single valve and the motor of dual valve simultaneously.For the motor of dual valve, can open single valve braking, also can open the dual valve braking.
Simultaneously, braking drive organ 100 can be solid chain type, also can be hydraulic type.The installation position of braking drive organ 100 and direction or arrangement also can be varied.Rocking arm 210 can also be special-purpose brake rocker arm except being the exhaust rocker arm of integrated form.
In addition, so-called here brake cam can be special-purpose brake cam, injection cam and exhaust cam etc.Therefore, the scope of the utility model should not decided by above-mentioned concrete illustration, but is decided by affiliated claim and the suitable power of law thereof.
Claims (11)
1. consolidate chain type duplicated crank braking device for one kind; The cam that comprises motor; Also comprise rocking arm, braking drive organ and bindiny mechanism, be placed on the pitman arm shaft described rocking arm rotary type, it is characterized in that: described rocking arm is arranged between the valve of described cam and motor; Described bindiny mechanism is arranged between the valve of rocking arm and motor; Bindiny mechanism has a primary importance and a second place with respect to rocking arm, is provided with the gap between the described primary importance and the second place, and braking drive organ contains an off position and an operating position; At described operating position, braking drive organ and the bindiny mechanism that is in the second place form a kind of rigid mechanical link between described cam and valve.
2. solid chain type duplicated crank braking device as claimed in claim 1 is characterized in that: also comprise at least one valve clearance controlling mechanism.
3. solid chain type duplicated crank braking device as claimed in claim 1, it is characterized in that: described bindiny mechanism comprises a link, described link is connected with rocking arm through a revolute pair.
4. solid chain type duplicated crank braking device as claimed in claim 3; It is characterized in that: be provided with a cylindrical hole in the described link; Described cylindrical hole and described pitman arm shaft constitute revolute pair; Perhaps, be set with a straight pin on the rocking arm, cylindrical hole and described straight pin constitute revolute pair.
5. solid chain type duplicated crank braking device as claimed in claim 4, it is characterized in that: described rocking arm and link are placed on the same pitman arm shaft interlacedly.
6. solid chain type duplicated crank braking device as claimed in claim 1, it is characterized in that: described braking drive organ is integrated in the described rocking arm.
7. solid chain type duplicated crank braking device as claimed in claim 1, it is characterized in that: described braking drive organ is integrated in the described bindiny mechanism.
8. solid chain type duplicated crank braking device as claimed in claim 1 is characterized in that: described braking drive organ is solid chain type load bearing mechanism, and described solid chain type load bearing mechanism forms mechanical linkages between cam and valve.
9. solid chain type duplicated crank braking device as claimed in claim 8; It is characterized in that: described solid chain type load bearing mechanism is the elbow-bar mechanism of single toggle link, and the elbow-bar mechanism of described single toggle link comprises a toggle link, a locking bar piston and a brake piston, and described brake piston contains a retracted position and an extended position; Retracted position at brake piston; Described toggle link is in heeling condition, and elbow-bar mechanism is in lax off position, at the extended position of brake piston; Toggle link is in straight configuration, and elbow-bar mechanism is in the operating position of locking.
10. solid chain type duplicated crank braking device as claimed in claim 8; It is characterized in that: described solid chain type load bearing mechanism is the elbow-bar mechanism of duplex bar, and the elbow-bar mechanism of described duplex bar comprises two toggle links, two locking bar pistons and a brake piston, and described brake piston contains a retracted position and an extended position; Retracted position at brake piston; Described two toggle links are in heeling condition, and elbow-bar mechanism is in lax off position, at the extended position of brake piston; Two toggle links are in straight configuration, and elbow-bar mechanism is in the operating position of locking.
11. solid chain type duplicated crank braking device as claimed in claim 1, it is characterized in that: also comprise preloading spring, described preloading spring is kept the primary importance and the formed gap of the second place of bindiny mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120217282 CN202194698U (en) | 2011-06-24 | 2011-06-24 | Fixed chain type composite rocker arm brake device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120217282 CN202194698U (en) | 2011-06-24 | 2011-06-24 | Fixed chain type composite rocker arm brake device |
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| CN202194698U true CN202194698U (en) | 2012-04-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840005A (en) * | 2011-06-24 | 2012-12-26 | 上海尤顺汽车部件有限公司 | Fixed-chain type composite rocker arm braking device |
| DE102017205814A1 (en) * | 2017-04-05 | 2018-10-11 | Avl List Gmbh | Mechanical valve actuator |
| CN110486113A (en) * | 2019-08-19 | 2019-11-22 | 上海尤顺汽车部件有限公司 | A kind of engine valve actuations mechanism |
| CN110529216A (en) * | 2019-06-27 | 2019-12-03 | 浙江黎明智造股份有限公司 | A kind of electric-controlled type engine braking apparatus |
| WO2022170981A1 (en) * | 2021-02-10 | 2022-08-18 | 上海尤顺汽车技术有限公司 | Engine rocker arm mechanism, engine two-stroke cycle braking system and method |
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2011
- 2011-06-24 CN CN 201120217282 patent/CN202194698U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840005A (en) * | 2011-06-24 | 2012-12-26 | 上海尤顺汽车部件有限公司 | Fixed-chain type composite rocker arm braking device |
| CN102840005B (en) * | 2011-06-24 | 2015-11-04 | 上海尤顺汽车部件有限公司 | A kind of solid chain type composite rocker arm brake device |
| DE102017205814A1 (en) * | 2017-04-05 | 2018-10-11 | Avl List Gmbh | Mechanical valve actuator |
| CN110529216A (en) * | 2019-06-27 | 2019-12-03 | 浙江黎明智造股份有限公司 | A kind of electric-controlled type engine braking apparatus |
| CN110529216B (en) * | 2019-06-27 | 2024-04-19 | 浙江黎明智造股份有限公司 | Electric control type engine braking device |
| CN110486113A (en) * | 2019-08-19 | 2019-11-22 | 上海尤顺汽车部件有限公司 | A kind of engine valve actuations mechanism |
| WO2022170981A1 (en) * | 2021-02-10 | 2022-08-18 | 上海尤顺汽车技术有限公司 | Engine rocker arm mechanism, engine two-stroke cycle braking system and method |
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