CN107143394A - Split type rocker arm brake mechanism of heavy diesel engine of commercial car - Google Patents
Split type rocker arm brake mechanism of heavy diesel engine of commercial car Download PDFInfo
- Publication number
- CN107143394A CN107143394A CN201710390954.1A CN201710390954A CN107143394A CN 107143394 A CN107143394 A CN 107143394A CN 201710390954 A CN201710390954 A CN 201710390954A CN 107143394 A CN107143394 A CN 107143394A
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- Prior art keywords
- rocking arm
- spring
- rocker arm
- arm body
- mounting hole
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- 230000007246 mechanism Effects 0.000 title claims abstract description 45
- 239000012530 fluid Substances 0.000 claims description 39
- 238000002788 crimping Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 10
- 125000006850 spacer group Chemical group 0.000 claims description 8
- 238000005461 lubrication Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 16
- 238000012423 maintenance Methods 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 61
- 238000013461 design Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 239000010720 hydraulic oil Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 244000144730 Amygdalus persica Species 0.000 description 4
- 235000006040 Prunus persica var persica Nutrition 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
- F01L13/065—Compression release engine retarders of the "Jacobs Manufacturing" type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The utility model provides a split type rocking arm arrestment mechanism of heavy diesel engine of commercial car, including the rocking arm body, swing mechanism, hydraulic drive system, the rocking arm body is installed on the rocking arm is epaxial through main mounting hole, swing mechanism includes the swing head, first adjusting bolt, the roller, the swing head is installed on the rocking arm body, the bottom of swing head is provided with the leaf spring, the leaf spring pressure equipment is in the bottom of rocking arm body, the bulb of first adjusting bolt is installed in the ball socket like sufficient, hydraulic drive system is including the hydraulic pressure plunger that the cover was equipped with return spring, the second adjusting bolt that contacts with the hydraulic pressure plunger, the rocking arm cam with hydraulic pressure plunger threaded connection, the hydraulic pressure plunger is installed in the drive intracavity of rocking arm body, the rocking arm cam contacts with the roller, this internal braking hydraulic pressure oil duct that all communicates with each other with main mounting hole. The brake has the advantages of high reliability, low cost, high light weight degree, simple structure, convenience in assembly and maintenance and good braking effect.
Description
Technical field
The present invention relates to commercial car large diesel engine rocker arm-braking field, more particularly to a kind of commercial car large diesel engine point
Ti Shi rocker arm-brakings mechanism, is primarily adapted for use in raising unfailing performance, reduces cost, improve light weight degree, simplify structure, conveniently
Assembling is with safeguarding, reinforcing braking effect.
Background technology
Commercial car large diesel engine rocker arm-braking is a kind of complemental brake system being integrated on commercial vehicle engine.It is long-distance
The commercial car traveling of transport is needed on long gentle slope road usually using braking, without complemental brake systems such as engine brakings
Commercial car needs to continue on the wheeled braking of service brake to reduce speed.But, in long gentle slope road, wheeled system is used for a long time
It is dynamic that brake block temperature rise can be caused too fast, and then cause brake-block temperature too high and be likely occurred braking effect reduction or even lose
Effect, it is easy to cause great irremediable personal safety hidden danger and property loss, this is also in hill path warp with a varied topography
Often occurs one of major reason of major traffic accidents, therefore, it is necessary to be equipped with complemental brake system to commercial car.It is logical
Normal auxiliary braking has the forms such as Retarder, engine exhaust and brake, engine rocker braking.But hydrodynamic retarding body
Product is big, weight is big, is unfavorable for the realization of automotive light weight technology；Engine exhaust and brake braking power is not too high, it usually needs
Used cooperatively with engine rocker braking；Engine rocker braking has light weight, the features such as braking power is high, its operation principle
It is：When engine rocker braking is enabled, in engine compression strokes under small peach point driving of the engine exhaust port on cam
Opened near the position of top dead centre, the high energy gas now compressed in cylinder is discharged outside cylinder rapidly, so as to discharge compression
The energy of gas, reaches braking effect, and the energy of engine is constantly consumed by reciprocal release after this, finally subtracts vehicle
Speed, and be unlikely to make brake block temperature rise too high so that it is safe and reliable.
Chinese patent, Authorization Notice No. is CN103758606B, and authorized announcement date is the disclosure of the invention of on 2 10th, 2016
The integrated form rocker arm brake apparatus of engine a kind of, one end of the rocking arm being hinged on rocker arm shaft is by being hinged on the rolling at the end
Wheel contact connection with exhaust cam, and the other end of rocking arm is provided with the arrestment mechanism for controlling exhaust valve bridge to act, arrestment mechanism and
Rocking arm between rocker arm shaft is provided with controlling organization, the hydraulic mechanism of be rotatably assorted solenoid valve control of the exhaust cam with motion rocker arm
Pass through the action of controlling organization and arrestment mechanism and then control exhaust valve bridge.Although the invention improves the integrated of arrestment mechanism
Degree, but it still has following defect：Rocker arm-braking is arranged using integrated form in the invention, such to design not only structure
Complicated, assembling is poor with difficult in maintenance, braking effect, and fluid pressure line is complicated, and reliability is relatively low, and more depth is opened up on rocking arm
Elongated hole, adds processing cost, meanwhile, the design volume is big, and space-consuming is big, is unfavorable for the realization of automotive light weight technology.
The content of the invention
The purpose of the present invention is to overcome that reliability present in prior art is low, cost is high, light weight degree is low, structure is multiple
There is provided a kind of reliability is high, cost is low, light weight degree for miscellaneous, assembling and the poor defect of difficult in maintenance, braking effect and problem
High, simple in construction, assembling and the split type rocker arm-braking mechanism of commercial car large diesel engine easy to maintenance, good braking effect.
To realize object above, technical solution of the invention is：A kind of split type rocking arm of commercial car large diesel engine
Arrestment mechanism, including rocking arm body, one end of the rocking arm body are hinged by the first bearing pin and roller, roller and cam phase
Contact, the other end of the rocking arm body, which is provided with the middle part of swing mechanism, the rocking arm body, is provided with main mounting hole, rocking arm
Body is arranged on rocker arm shaft by main mounting hole；
The swing mechanism includes swinging head, the first adjustment bolt, roller, and one end of the swinging head is provided with installation cavity, puts
The other end of dynamic head, which is provided with the middle part of the first mounting hole, swinging head, is provided with the second mounting hole, and the bottom of the swinging head is set
Plate-like spring is equipped with, one end of the plate-like spring is fixed on the bottom of swinging head, and the other end of plate-like spring is fitted in rocking arm
Second bearing pin is installed, the swinging head is arranged on rocking arm sheet by the second bearing pin in the bottom of body, first mounting hole
On body, first adjustment bolt includes screw rod and bulb, and the screw flight is connected in installation cavity, one end connection of screw rod
There is the first locking nut, the other end of screw rod is connected with bulb, the bulb as sufficient clip by being arranged on as the ball-and-socket of foot
Interior, the roller is arranged in the second mounting hole；
The top of the rocking arm body, which is provided with driving chamber, driving chamber, is provided with hydraulic system, and the hydraulic system includes liquid
Drive system is pressed, the fluid power system includes hydraulic plunger, the second adjustment bolt, rocker cam, the hydraulic plunger bag
Include cylinder and bar portion, the cylinder is arranged in driving chamber, one end of the bar portion pass after driving chamber with rocker cam screw thread
Connection, the other end of bar portion is connected with cylinder, and the position being located in bar portion in driving chamber is arranged with return spring, described second
Adjustment bolt is threaded in driving chamber, and the second adjustment bolt is in contact with cylinder, and driving chamber is located in the second adjustment bolt
Outer position is connected with the second locking nut, and the rocker cam is in contact with roller；
Brake fluid pressure oil duct is provided with the rocking arm body, one end of the brake fluid pressure oil duct is extended in main mounting hole,
The other end of brake fluid pressure oil duct is extended in driving chamber, and rocker arm shaft hydraulic pressure oilhole, rocker arm shaft liquid are provided with the rocker arm shaft
Force feed hole is communicated with brake fluid pressure oil duct.
The plate-like spring includes planar section and crimping portion, and the planar section is fixed on by spring trip bolt
The bottom of swinging head, the crimping portion is fitted in the bottom of rocking arm body.
Spring pressuring plate is installed, the spring pressuring plate is close to crimping portion between planar section and the spring trip bolt
One end be arranged to curly.
Position on the swinging head positioned at the second mounting hole both sides, which is provided with limit pin hole, the limit pin hole, pacifies
Equipped with spacer pin.
The hydraulic system also include overload protective device, the overload protective device include overflow spring, dish-type piston,
Hydraulic cavities are provided with piston clip, the cylinder, the overflow spring, dish-type piston, piston clip are all disposed within hydraulic cavities
Interior, one end of the overflow spring and the bottom connection of hydraulic cavities are touched, the other end of overflow spring and one end phase of dish-type piston
Contact, the other end of dish-type piston is in contact with piston clip, second adjustment bolt include the elongate tip being connected and
Adjustment bolt body, the elongate tip is passed after piston clip and is in contact with dish-type piston, on the inner peripheral surface of the hydraulic cavities
Be provided with the draining road for being provided with and being communicated with overflow launder in overflow launder, the bar portion, the end of the rocker cam be provided with
The rocker cam oil duct that draining road is communicated.
Bushing is inlaid with the main mounting hole, the bushing is arranged on rocker arm shaft, and bushing hydraulic pressure is provided with bushing
Oilhole, the bushing hydraulic pressure oilhole is communicated with rocker arm shaft hydraulic pressure oilhole, brake fluid pressure oil duct.
Oil leab is provided with the rocking arm body, one end of oil leab is extended in main mounting hole, oil leab
The other end extend in the mounting hole of the first bearing pin, be provided with the rocker arm shaft communicated with oil leab rocker arm shaft lubrication
The bushing oilhole homogeneously led to oil leab, rocking arm shaft oil hole is provided with oilhole, the bushing.
Compared with prior art, beneficial effects of the present invention are：
1st, rocker arm-braking mechanism is reaching existing shake in the split type rocker arm-braking mechanism of a kind of commercial car large diesel engine of the invention
On the basis of arm braking basic performance, using split-type design so that fluid pressure line simplifies, and precision and unfailing performance are more prone to
It is guaranteed, also greatly reduces the processing quantity and length of deep and long hole on rocking arm so that processing is simpler, so as to reduce
Cost, meanwhile, the design volume is small, can save space, is conducive to the realization of automotive light weight technology, in addition, such design knot
Structure is simple, assembling with it is easy to maintenance, with good braking effect.Therefore, reliability of the present invention is high, cost is low, lightweight journey
Degree is high, simple in construction, assemble and easy to maintenance, good braking effect.
2nd, the return of swinging head uses piece shape in the split type rocker arm-braking mechanism of a kind of commercial car large diesel engine of the invention
Spring, spring pressuring plate is provided between plate-like spring and spring trip bolt, is conducive to improving the return ability of plate-like spring,
And the stress distribution of plate-like spring can be improved, its fatigue strength is favorably improved, increases its service life；It is located at the on swinging head
The position of two mounting hole both sides, which is provided with limit pin hole, limit pin hole, is provided with spacer pin, sets up spacer pin, for rolling
Post progress is spacing, so as to improve the unfailing performance of roller work.Therefore, reliability height of the present invention, service life are long.
3rd, hydraulic system also includes overload guarantor in the split type rocker arm-braking mechanism of a kind of commercial car large diesel engine of the invention
Protecting system, when oil pressure exceedes threshold value, overflow spring is compressed, and dish-type piston is close to overflow spring movement, and overflow launder is exposed
In driving chamber, hydraulic oil flows out after overflow launder, draining road, rocker cam oil duct successively, and such design not only had
The function of protection is carried, and lubrication is played a part of to part；Oil leab, one end of oil leab are provided with rocking arm body
Extend in main mounting hole, the other end of oil leab is extended in the mounting hole of the first bearing pin, is provided with and is moistened on rocker arm shaft
It is provided with and oil leab on the rocking arm shaft oil hole that grease way is communicated, bushing, the bushing that rocking arm shaft oil hole homogeneously leads to
Oilhole, can be lubricated to each part well using above-mentioned lubricant passage way.Therefore, the present invention not only has overload protection
Function, and high lubricating effect.
Brief description of the drawings
Fig. 1 is a kind of structural blast schematic diagram of the split type rocker arm-braking mechanism of commercial car large diesel engine of the invention.
Fig. 2 is a kind of non-brake state First Principle of the split type rocker arm-braking mechanism of commercial car large diesel engine of the invention
Schematic diagram.
Fig. 3 is a kind of principle of non-brake state second of the split type rocker arm-braking mechanism of commercial car large diesel engine of the invention
Schematic diagram.
Fig. 4 is a kind of non-opening structure of braking of the split type rocker arm-braking mechanism of commercial car large diesel engine of the invention
Schematic diagram.
Fig. 5 is that a kind of braking opening principle of the split type rocker arm-braking mechanism of commercial car large diesel engine of the invention is shown
It is intended to.
Fig. 6 is that a kind of braking opening structure of the split type rocker arm-braking mechanism of commercial car large diesel engine of the invention is shown
It is intended to.
Fig. 7 is that a kind of overload protection overflow situation of the split type rocker arm-braking mechanism of commercial car large diesel engine of the invention is former
Manage schematic diagram.
Fig. 8 is that a kind of brake fluid pressure oil channel structure of the split type rocker arm-braking mechanism of commercial car large diesel engine of the invention shows
It is intended to.
In figure：Rocking arm body 1, the first bearing pin 11, main mounting hole 12, driving chamber 13, brake fluid pressure oil duct 14, bushing 15,
Bushing hydraulic pressure oilhole 151, bushing oilhole 152, oil leab 16, roller 2, cam 3, small peach point 31, swinging head 4, first
Adjustment bolt 41, roller 42, installation cavity 43, the first mounting hole 44, the second mounting hole 45, plate-like spring 46, the second bearing pin 47,
One locking nut 48, as sufficient clip 49, as foot 410, spring trip bolt 411, spring pressuring plate 412, limit pin hole 413, spacing
Pin 414, screw rod 415, bulb 416, planar section 417, crimping portion 418, rocker arm shaft 5, rocking arm shaft oil hole 51, rocker arm shaft
Hydraulic pressure oilhole 52, hydraulic plunger 6, the second adjustment bolt 61, rocker cam 62, return spring 63, the second locking nut 64, overflow
Spring 65, dish-type piston 66, piston clip 67, cylinder 68, bar portion 69, overflow launder 610, draining road 611, air valve yoke 7, exhaust valve
8th, plug 9.
Embodiment
Below in conjunction with brief description of the drawings, the present invention is further detailed explanation with embodiment.
Referring to Fig. 1 to Fig. 8, a kind of split type rocker arm-braking mechanism of commercial car large diesel engine, including rocking arm body 1, institute
The one end for stating rocking arm body 1 is hinged by the first bearing pin 11 and roller 2, and roller 2 is in contact with cam 3, the rocking arm body 1
The other end be provided with swing mechanism, the middle part of the rocking arm body 1 is provided with main mounting hole 12, and rocking arm body 1 passes through main peace
Hole 12 is filled to be arranged on rocker arm shaft 5；
The swing mechanism includes swinging head 4, the first adjustment bolt 41, roller 42, and one end of the swinging head 4 is provided with installation
Chamber 43, the other end of swinging head 4 is provided with the first mounting hole 44, and the middle part of swinging head 4 is provided with the second mounting hole 45, the pendulum
Dynamic first 4 bottom is provided with plate-like spring 46, and one end of the plate-like spring 46 is fixed on the bottom of swinging head 4, plate-like spring
46 other end is fitted in the bottom of rocking arm body 1, first mounting hole 44 and is provided with the second bearing pin 47, the swinging head
4 are arranged on rocking arm body 1 by the second bearing pin 47, and first adjustment bolt 41 includes screw rod 415 and bulb 416, described
Screw rod 415 is threaded in installation cavity 43, and one end of screw rod 415 is connected with the first locking nut 48, the other end of screw rod 415
It is connected with bulb 416, the bulb 416 as sufficient clip 49 by being arranged in the ball-and-socket as foot 410, and the roller 42 is installed
In the second mounting hole 45；
The top of the rocking arm body 1, which is provided with driving chamber 13, driving chamber 13, is provided with hydraulic system, the hydraulic system bag
Fluid power system is included, the fluid power system includes hydraulic plunger 6, the second adjustment bolt 61, rocker cam 62, the liquid
Hydraulic plunger 6 includes cylinder 68 and bar portion 69, and the cylinder 68 is arranged in driving chamber 13, and one end of the bar portion 69 passes driving
It is threadedly coupled after chamber 13 with rocker cam 62, the other end of bar portion 69 is connected with cylinder 68, driving chamber 13 is located in bar portion 69
Interior position is arranged with return spring 63, and second adjustment bolt 61 is threaded in driving chamber 13, the second adjustment bolt
61 are in contact with cylinder 68, and the position being located in the second adjustment bolt 61 outside driving chamber 13 is connected with the second locking nut 64, institute
Rocker cam 62 is stated to be in contact with roller 42；
Brake fluid pressure oil duct 14 is provided with the rocking arm body 1, one end of the brake fluid pressure oil duct 14 extends to main installation
In hole 12, the other end of brake fluid pressure oil duct 14 is extended in driving chamber 13, and rocker arm shaft hydraulic oil is provided with the rocker arm shaft 5
Hole 52, rocker arm shaft hydraulic pressure oilhole 52 is communicated with brake fluid pressure oil duct 14.
The plate-like spring 46 includes planar section 417 and crimping portion 418, and the planar section 417 is tight by spring
Gu screw 411 is fixed on the bottom of swinging head 4, the crimping portion 418 is fitted in the bottom of rocking arm body 1.
Spring pressuring plate 412, the spring pressuring plate 412 are installed between the planar section 417 and spring trip bolt 411
One end close to crimping portion 418 is arranged to curly.
Position on the swinging head 4 positioned at the both sides of the second mounting hole 45 is provided with limit pin hole 413, the spacer pin
Spacer pin 414 is installed in hole 413.
The hydraulic system also includes overload protective device, and the overload protective device includes overflow spring 65, dish-type and lived
Hydraulic cavities, the overflow spring 65, dish-type piston 66, piston clip 67 are provided with plug 66, piston clip 67, the cylinder 68
It is all disposed within hydraulic cavities, one end of the overflow spring 65 and the bottom connection of hydraulic cavities are touched, the other end of overflow spring 65
It is in contact with one end of dish-type piston 66, the other end of dish-type piston 66 is in contact with piston clip 67, the second adjustment spiral shell
Bolt 61 includes the elongate tip that is connected and adjustment bolt body, the elongate tip pass after piston clip 67 with dish-type piston
66 are in contact, and are provided with overflow launder 610, the bar portion 69 and are provided with and the phase of overflow launder 610 on the inner peripheral surface of the hydraulic cavities
Logical draining road 611, the end of the rocker cam 62 is provided with the rocker cam oil duct communicated with draining road 611.
Bushing 15 is inlaid with the main mounting hole 12, the bushing 15 is arranged on rocker arm shaft 5, is provided with bushing 15
Bushing hydraulic pressure oilhole 151, the bushing hydraulic pressure oilhole 151 is communicated with rocker arm shaft hydraulic pressure oilhole 52, brake fluid pressure oil duct 14.
Oil leab 16 is provided with the rocking arm body 1, one end of oil leab 16 is extended in main mounting hole 12, moistened
The other end of grease way 16 is extended in the mounting hole of the first bearing pin 11, is provided with the rocker arm shaft 5 and the phase of oil leab 16
It is provided with and is communicated with oil leab 16, rocking arm shaft oil hole 51 on logical rocking arm shaft oil hole 51, the bushing 15
Bushing oilhole 152.
The principle of the present invention is described as follows：
A kind of split type rocker arm-braking mechanism of commercial car large diesel engine of the design is main by rocking arm body, hydraulic system, swing
Mechanism is constituted；The rocking arm body is arranged on rocker arm shaft, it is possible to rotated around rocker arm shaft, in the main mounting hole of rocking arm body
Fixed to be inlaid with bushing, bushing is provided with bushing oilhole and bushing hydraulic pressure oilhole, and rocking arm body and bushing integral installation exist
On rocker arm shaft, rocker arm shaft is provided with rocking arm shaft oil hole and rocker arm shaft hydraulic pressure oilhole, and roller is arranged on by the first bearing pin and shaken
Arm body afterbody, and can be rotated around the first bearing pin, brake fluid pressure oil duct and oil leab, system are provided with the main mounting hole of rocking arm body
Hydrodynamic pressure oil duct is extended in driving chamber, and oil leab extends to fabrication hole plug 9 above roller pin-and-hole, brake fluid pressure oil duct
Threaded connection is blocked；When engine exhaust port 8 is closed, rocker arm shaft hydraulic pressure oilhole and the brake fluid pressure on rocking arm body
Oil duct coincide, and rocking arm integrally can be in rocker arm shaft center rotating, practical work process, and cam rotation is simultaneously shaken by roller driving
Arm is rotated around rocker arm shaft.
The swing mechanism by swinging head, the first adjustment bolt, the first locking nut, as foot, as sufficient clip, second pin
Axle, roller, two spacer pins, plate-like spring, spring pressuring plate, spring trip bolt compositions；Swinging head is installed by the second bearing pin
On rocking arm body, and it can be rotated around the second bearing pin；First adjustment bolt is connected through a screw thread the installation cavity installed in swinging head
In, the first locking nut is connected through a screw thread in the first adjustment bolt, the bulb of the first adjustment bolt and the ball as foot
Nest carry out it is movable coordinate install, and by as sufficient clip carry out it is spacing；Roller is arranged in the mounting hole of swinging head, and two spacing
Pin is carried out spacing in two limit pin holes of swinging head positioned at the top of roller to it；Plate-like spring afterbody is in curling
Shape, is pressed in rocking arm body bottom portion, planar section and the swinging head base plane of plate-like spring coordinate, and pass through spring trip bolt
It is fixed, spring pressuring plate is installed between spring trip bolt and plate-like spring, spring pressuring plate helps to improve plate-like spring
Mechanical property, is favorably improved work rigidity, functional reliability and the life-span of plate-like spring.Spring pressuring plate is deformed in plate-like spring
That side be arranged to curly, prevent in plate-like spring BENDING PROCESS produce stress concentration and by destruction damage.
The hydraulic system include fluid power system and overload protective device, fluid power system by hydraulic plunger, return
Position spring, the second adjustment bolt, the second locking nut, rocker cam composition, overload protective device is by dish-type piston and overflow bullet
Spring is constituted；The Front-end Design of the hydraulic plunger has screw thread, is threadedly coupled with rocker cam, and rocker cam end is drilled with oil
Road, the afterbody of hydraulic plunger, which is designed with hydraulic cavities, hydraulic cavities, is provided with two overflow launders, and draining road is set in hydraulic plunger bar portion；
Dish-type piston is pressed on overflow spring, and dish-type piston is spacing by piston clip, and the overflow spring other end is pressed in hydraulic plunger
Hydraulic cavities bottom, the Front-end Design of the second adjustment bolt withstands on dish-type piston upper surface into elongate tip, and the second adjustment bolt is led to
Cross threaded connection and be arranged on rocking arm ontology-driven intracavitary, the second locking nut is connected through a screw thread with the second adjustment bolt；Return
The rigidity of spring is less than the rigidity of overflow spring.
During non-brake state, hydraulic plunger is in retracted state, and the roller of rocking arm body tail section is pressed in cam base circle position
When, rocker arm shaft hydraulic pressure oilhole just docks insertion, roller and the small peach of valve cam with the brake fluid pressure oil duct set in rocking arm body
Do not contacted in sharp whole working cycles.When braking is opened, under the control of magnetic valve, high pressure liquid force feed enters in rocker arm shaft,
And, through the bushing hydraulic pressure oilhole of bushing, reached from rocker arm shaft intracavitary by rocker arm shaft hydraulic pressure oilhole into brake fluid pressure oil duct
Driving chamber, and then promote hydraulic plunger to travel forward and stretch out, so as to promote rocker cam to travel forward, act on roller,
And then rocking arm is integrally rotated around rocker arm shaft so that roller is pressed on valve cam, in certain of engine operational cycle
A little moment small peach points can with roller contact and have an effect so that exhaust valve has breakdown action, realizes the effect of engine braking
Really.During this, plate-like spring is oppressed deformation, and return spring is compressed, and when braking function is revoked, hydraulic plunger is multiple
Position, swinging head resets in the presence of plate-like spring.When hydraulic oil is not very high, disk piston is pressed on work by overflow spring
On fork clip hoop, hydraulic oil can not be flowed out by overflow launder；When oil pressure exceedes threshold value, overflow spring is compressed, and disk piston is tight
Overflow spring movement is pasted, by overflow launder in driving chamber, hydraulic oil is flowed out, and enter by overflow launder by draining road
Rocker cam, then part outflow, the not only function with overload protection, and lubrication is played a part of to part；Work as oil pressure
When reducing to a certain extent, under overflow spring effect, disk piston resets.After braking mode is closed, in return spring
Under effect, hydraulic plunger return, swinging head return under plate-like spring effect.
The design is on the basis of existing rocker arm-braking basic performance is reached, using split type rocking arm so that existing liquid
Press the fluid pressure line of integrated form brake rocker arm to simplify, reliability is high, small volume, save space, contribute to engine structure light weight
The realization of change, saves cost；This structural elements quantity is few, simple in construction, and I＆ M is convenient, and reliable operation has
Good braking effect.
Embodiment 1：
Referring to Fig. 1 to Fig. 8, a kind of split type rocker arm-braking mechanism of commercial car large diesel engine, including rocking arm body 1, it is described to shake
One end of arm body 1 is hinged by the first bearing pin 11 and roller 2, and roller 2 is in contact with cam 3, the rocking arm body 1 it is another
One end is provided with swing mechanism, and the middle part of the rocking arm body 1 is provided with main mounting hole 12, and rocking arm body 1 passes through main mounting hole
12 are arranged on rocker arm shaft 5；The swing mechanism includes swinging head 4, the first adjustment bolt 41, roller 42, the swinging head 4
One end is provided with installation cavity 43, and the other end of swinging head 4 is provided with the first mounting hole 44, and the middle part of swinging head 4 is provided with second
Mounting hole 45, the bottom of the swinging head 4 is provided with plate-like spring 46, and one end of the plate-like spring 46 is fixed on swinging head 4
Bottom, the other end of plate-like spring 46 is fitted in the bottom of rocking arm body 1, first mounting hole 44 and is provided with the second pin
Axle 47, the swinging head 4 is arranged on rocking arm body 1 by the second bearing pin 47, and first adjustment bolt 41 includes screw rod 415
With bulb 416, the screw rod 415 is threaded in installation cavity 43, and one end of screw rod 415 is connected with the first locking nut 48,
The other end of screw rod 415 is connected with bulb 416, and the bulb 416 as sufficient clip 49 by being arranged on as the ball-and-socket of foot 410
Interior, the roller 42 is arranged in the second mounting hole 45, and the position on the swinging head 4 positioned at the both sides of the second mounting hole 45 is all provided with
It is equipped with limit pin hole 413, the limit pin hole 413 and spacer pin 414 is installed；The top of the rocking arm body 1 is provided with drive
Hydraulic system is provided with dynamic chamber 13, driving chamber 13, the hydraulic system includes fluid power system, the fluid power system
Including hydraulic plunger 6, the second adjustment bolt 61, rocker cam 62, the hydraulic plunger 6 includes cylinder 68 and bar portion 69, described
Cylinder 68 is arranged in driving chamber 13, and one end of the bar portion 69 passes after driving chamber 13 and is threadedly coupled with rocker cam 62, bar
The other end in portion 69 is connected with cylinder 68, and the position being located in bar portion 69 in driving chamber 13 is arranged with return spring 63, described
Second adjustment bolt 61 is threaded in driving chamber 13, and the second adjustment bolt 61 is in contact with cylinder 68, the second adjustment bolt
The position being located on 61 outside driving chamber 13 is connected with the second locking nut 64, and the rocker cam 62 is in contact with roller 42；Institute
State and brake fluid pressure oil duct 14 be provided with rocking arm body 1, one end of the brake fluid pressure oil duct 14 is extended in main mounting hole 12,
The other end of brake fluid pressure oil duct 14 is extended in driving chamber 13, and rocker arm shaft hydraulic pressure oilhole 52 is provided with the rocker arm shaft 5, is shaken
Arm axle hydraulic pressure oilhole 52 is communicated with brake fluid pressure oil duct 14.
Embodiment 2：
Substance be the same as Example 1, difference is：
Referring to Fig. 1 to Fig. 8, the plate-like spring 46 includes planar section 417 and crimping portion 418, and the planar section 417 leads to
The bottom that spring trip bolt 411 is fixed on swinging head 4 is crossed, the crimping portion 418 is fitted in the bottom of rocking arm body 1；Institute
State and spring pressuring plate 412 is installed between planar section 417 and spring trip bolt 411, the spring pressuring plate 412 is close to curled portion
418 one end is divided to be arranged to curly.
Embodiment 3：
Substance be the same as Example 1, difference is：
Referring to Fig. 1 to Fig. 8, the hydraulic system also includes overload protective device, and the overload protective device includes overflow spring
65th, be provided with hydraulic cavities in dish-type piston 66, piston clip 67, the cylinder 68, the overflow spring 65, dish-type piston 66,
Piston clip 67 is all disposed within hydraulic cavities, and one end of the overflow spring 65 and the bottom connection of hydraulic cavities are touched, overflow spring
65 other end is in contact with one end of dish-type piston 66, and the other end of dish-type piston 66 is in contact with piston clip 67, described
Second adjustment bolt 61 includes the elongate tip being connected and adjustment bolt body, and the elongate tip is passed after piston clip 67
It is in contact with dish-type piston 66, is provided with the inner peripheral surface of the hydraulic cavities in overflow launder 610, the bar portion 69 and is provided with and overflows
The draining road 611 that chute 610 is communicated, the end of the rocker cam 62 is provided with the rocker cam oil communicated with draining road 611
Road.
Embodiment 4：
Substance be the same as Example 1, difference is：
Referring to Fig. 1 to Fig. 8, bushing 15 is inlaid with the main mounting hole 12, the bushing 15 is arranged on rocker arm shaft 5, bushing
Bushing hydraulic pressure oilhole 151, the bushing hydraulic pressure oilhole 151 and rocker arm shaft hydraulic pressure oilhole 52, brake fluid pressure oil duct are provided with 15
14 communicate；Oil leab 16 is provided with the rocking arm body 1, one end of oil leab 16 is extended in main mounting hole 12,
The other end of oil leab 16 is extended in the mounting hole of the first bearing pin 11, is provided with the rocker arm shaft 5 and oil leab 16
It is provided with and is communicated with oil leab 16, rocking arm shaft oil hole 51 on the rocking arm shaft oil hole 51 communicated, the bushing 15
Bushing oilhole 152.
Claims (7)
1. a kind of split type rocker arm-braking mechanism of commercial car large diesel engine, including rocking arm body（1）, the rocking arm body（1）
One end pass through the first bearing pin（11）With roller（2）It is hinged, roller（2）With cam（3）It is in contact, the rocking arm body（1）
The other end be provided with swing mechanism, the rocking arm body（1）Middle part be provided with main mounting hole（12）, rocking arm body（1）It is logical
Cross main mounting hole（12）Installed in rocker arm shaft（5）On, it is characterised in that：
The swing mechanism includes swinging head（4）, the first adjustment bolt（41）, roller（42）, the swinging head（4）One end set
It is equipped with installation cavity（43）, swinging head（4）The other end be provided with the first mounting hole（44）, swinging head（4）Middle part be provided with
Two mounting holes（45）, the swinging head（4）Bottom be provided with plate-like spring（46）, the plate-like spring（46）One end fix
In swinging head（4）Bottom, plate-like spring（46）The other end be fitted in rocking arm body（1）Bottom, first mounting hole
（44）Second bearing pin is inside installed（47）, the swinging head（4）Pass through the second bearing pin（47）Installed in rocking arm body（1）On, institute
State the first adjustment bolt（41）Including screw rod（415）With bulb（416）, the screw rod（415）It is threaded in installation cavity（43）
It is interior, screw rod（415）One end be connected with the first locking nut（48）, screw rod（415）The other end and bulb（416）It is connected,
The bulb（416）By as sufficient clip（49）Installed in as foot（410）Ball-and-socket in, the roller（42）Installed in the second peace
Fill hole（45）It is interior；
The rocking arm body（1）Top be provided with driving chamber（13）, driving chamber（13）Inside it is provided with hydraulic system, the hydraulic pressure
System includes fluid power system, and the fluid power system includes hydraulic plunger（6）, the second adjustment bolt（61）, rocking arm it is convex
Wheel（62）, the hydraulic plunger（6）Including cylinder（68）With bar portion（69）, the cylinder（68）It is arranged on driving chamber（13）It is interior,
The bar portion（69）One end pass driving chamber（13）Afterwards with rocker cam（62）Threaded connection, bar portion（69）The other end and post
Body（68）It is connected, bar portion（69）It is upper to be located at driving chamber（13）Interior position is arranged with return spring（63）, second adjustment
Bolt（61）It is threaded in driving chamber（13）It is interior, the second adjustment bolt（61）With cylinder（68）It is in contact, the second adjustment bolt
（61）It is upper to be located at driving chamber（13）Outer position is connected with the second locking nut（64）, the rocker cam（62）With roller（42）
It is in contact；
The rocking arm body（1）Inside it is provided with brake fluid pressure oil duct（14）, the brake fluid pressure oil duct（14）One end extend to
Main mounting hole（12）It is interior, brake fluid pressure oil duct（14）The other end extend to driving chamber（13）It is interior, the rocker arm shaft（5）It is upper to set
There is rocker arm shaft hydraulic pressure oilhole（52）, rocker arm shaft hydraulic pressure oilhole（52）With brake fluid pressure oil duct（14）Communicate.
2. the split type rocker arm-braking mechanism of a kind of commercial car large diesel engine according to claim 1, it is characterised in that：Institute
State plate-like spring（46）Including planar section（417）With crimping portion（418）, the planar section（417）Fastened by spring
Screw（411）It is fixed on swinging head（4）Bottom, the crimping portion（418）It is fitted in rocking arm body（1）Bottom.
3. the split type rocker arm-braking mechanism of a kind of commercial car large diesel engine according to claim 2, it is characterised in that：Institute
State planar section（417）With spring trip bolt（411）Between spring pressuring plate is installed（412）, the spring pressuring plate（412）Lean on
Nearly crimping portion（418）One end be arranged to curly.
4. the split type rocker arm-braking mechanism of a kind of commercial car large diesel engine according to claim 1, it is characterised in that：Institute
State swinging head（4）It is upper to be located at the second mounting hole（45）The position of both sides is provided with limit pin hole（413）, the limit pin hole
（413）Spacer pin is inside installed（414）.
5. the split type rocker arm-braking mechanism of a kind of commercial car large diesel engine according to claim 1, it is characterised in that：Institute
Stating hydraulic system also includes overload protective device, and the overload protective device includes overflow spring（65）, dish-type piston（66）, it is living
Fork clip hoop（67）, the cylinder（68）Inside it is provided with hydraulic cavities, the overflow spring（65）, dish-type piston（66）, piston clip
（67）It is all disposed within hydraulic cavities, the overflow spring（65）One end and hydraulic cavities bottom connection touch, overflow spring（65）
The other end and dish-type piston（66）One end be in contact, dish-type piston（66）The other end and piston clip（67）It is in contact,
Second adjustment bolt（61）Including the elongate tip being connected and adjustment bolt body, the elongate tip passes piston card
Hoop（67）Afterwards with dish-type piston（66）It is in contact, overflow launder is provided with the inner peripheral surface of the hydraulic cavities（610）, the bar portion
（69）Inside it is provided with and overflow launder（610）The draining road communicated（611）, the rocker cam（62）End be provided with and draining
Road（611）The rocker cam oil duct communicated.
6. the split type rocker arm-braking mechanism of a kind of commercial car large diesel engine according to claim 1, it is characterised in that：Institute
State main mounting hole（12）Inside it is inlaid with bushing（15）, the bushing（15）Installed in rocker arm shaft（5）On, bushing（15）On be provided with
Bushing hydraulic pressure oilhole（151）, the bushing hydraulic pressure oilhole（151）With rocker arm shaft hydraulic pressure oilhole（52）, brake fluid pressure oil duct（14）
Communicate.
7. the split type rocker arm-braking mechanism of a kind of commercial car large diesel engine according to claim 6, it is characterised in that：Institute
State rocking arm body（1）Inside it is provided with oil leab（16）, oil leab（16）One end extend to main mounting hole（12）It is interior, lubrication
Oil duct（16）The other end extend to the first bearing pin（11）Mounting hole in, the rocker arm shaft（5）On be provided with and oil leab
（16）The rocking arm shaft oil hole communicated（51）, the bushing（15）On be provided with and oil leab（16）, rocking arm spindle oil
Hole（51）The bushing oilhole communicated（152）.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710390954.1A CN107143394B (en) | 2017-05-27 | 2017-05-27 | Split rocker arm braking mechanism of heavy diesel engine of commercial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710390954.1A CN107143394B (en) | 2017-05-27 | 2017-05-27 | Split rocker arm braking mechanism of heavy diesel engine of commercial vehicle |
Publications (2)
| Publication Number | Publication Date |
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| CN107143394A true CN107143394A (en) | 2017-09-08 |
| CN107143394B CN107143394B (en) | 2023-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710390954.1A Active CN107143394B (en) | 2017-05-27 | 2017-05-27 | Split rocker arm braking mechanism of heavy diesel engine of commercial vehicle |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109469527A (en) * | 2018-12-11 | 2019-03-15 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
| CN109488404A (en) * | 2018-12-11 | 2019-03-19 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
| CN109488403A (en) * | 2018-12-11 | 2019-03-19 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
| CN109488405A (en) * | 2018-12-11 | 2019-03-19 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
| CN109736912A (en) * | 2018-12-11 | 2019-05-10 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
| CN109915223A (en) * | 2019-03-27 | 2019-06-21 | 大连理工大学 | A kind of highly reliable multi-mode valve actuating mechanism of compact |
| CN111788369A (en) * | 2017-12-04 | 2020-10-16 | 伊顿智能动力有限公司 | Engine brake rocker arm with offset configuration |
| CN113931712A (en) * | 2021-09-30 | 2022-01-14 | 东风商用车有限公司 | Rocker arm assembly with variable valve lift |
| US11391186B2 (en) | 2016-06-25 | 2022-07-19 | Eaton Intelligent Power Limited | Valve train assembly |
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| US11391186B2 (en) | 2016-06-25 | 2022-07-19 | Eaton Intelligent Power Limited | Valve train assembly |
| CN111788369A (en) * | 2017-12-04 | 2020-10-16 | 伊顿智能动力有限公司 | Engine brake rocker arm with offset configuration |
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| CN109488405A (en) * | 2018-12-11 | 2019-03-19 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
| CN109736912A (en) * | 2018-12-11 | 2019-05-10 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
| CN109469527A (en) * | 2018-12-11 | 2019-03-15 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
| CN109488405B (en) * | 2018-12-11 | 2021-04-30 | 大连理工大学 | Multi-mode valve mechanism and control method thereof |
| CN109488403B (en) * | 2018-12-11 | 2021-04-30 | 大连理工大学 | Multi-mode valve mechanism and control method thereof |
| CN109469527B (en) * | 2018-12-11 | 2021-06-08 | 大连理工大学 | Multi-mode valve mechanism and control method thereof |
| CN109488403A (en) * | 2018-12-11 | 2019-03-19 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
| CN109488404A (en) * | 2018-12-11 | 2019-03-19 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
| CN109915223A (en) * | 2019-03-27 | 2019-06-21 | 大连理工大学 | A kind of highly reliable multi-mode valve actuating mechanism of compact |
| CN113931712A (en) * | 2021-09-30 | 2022-01-14 | 东风商用车有限公司 | Rocker arm assembly with variable valve lift |
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