CN114810267A - Valve rocker mechanism and diesel engine - Google Patents
Valve rocker mechanism and diesel engine Download PDFInfo
- Publication number
- CN114810267A CN114810267A CN202210493741.2A CN202210493741A CN114810267A CN 114810267 A CN114810267 A CN 114810267A CN 202210493741 A CN202210493741 A CN 202210493741A CN 114810267 A CN114810267 A CN 114810267A
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- Prior art keywords
- rocker
- valve
- rocker arm
- oil
- shaft
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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
- F01L1/181—Centre pivot rocking arms
- F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
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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
Abstract
The invention discloses a valve rocker mechanism and a diesel engine, and relates to the technical field of diesel engines, and the valve rocker mechanism comprises a rocker shaft, wherein the rocker shaft is fixedly arranged on a cylinder cover of the diesel engine, and an oil supply channel is arranged in the rocker shaft; a plurality of rocker arms are sleeved on the rocker arm shaft in a rotating manner, one end of each rocker arm is movably connected with a push rod, and the other end of each rocker arm is movably connected with a valve; the rocker arm is provided with two first oil ducts, the rocker arm shaft is provided with two second oil ducts which are respectively communicated with the oil supply channels, when the push rod drives the rocker arm to rotate so that the rocker arm is abutted against the valve to open the valve, the two second oil ducts are communicated with the two first oil ducts in a one-to-one correspondence mode, and lubricating oil in the oil supply channels is respectively supplied to the push rod and the valve. The rocker arm and the rocker arm shaft are lubricated, and a small amount of lubricating oil is used for lubricating the rocker arm and the rocker arm shaft under the condition that the required amount of the lubricating oil is small when the valve is closed; in the valve opening process, the oil supply amount and the oil supply pressure are increased instantly, and the lubricating effect is good.
Description
Technical Field
The invention relates to the technical field of diesel engines, in particular to a valve rocker mechanism and a diesel engine.
Background
At present, the common lubrication mode of the engine is pressure lubrication, splash lubrication or the combination of the pressure lubrication and the splash lubrication, and the lubricating oil is continuously and indiscriminately supplied to the push rod and the valve.
However, the demand of the push rod and the valve for lubricating oil is different in different working stages, when the push rod applies acting force to the rocker arm to drive the rocker arm to swing, the demand of the lubricating oil at the movable connection part of the push rod and the rocker arm is the largest, meanwhile, the other end of the rocker arm abuts against the valve to apply pressure to the valve so as to open the valve, and the demand of the lubricating oil at the abutting part of the rocker arm and the valve is also the largest.
Disclosure of Invention
The invention aims to provide a valve rocker mechanism and a diesel engine, and aims to overcome the defects in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme: a valve rocker mechanism comprises a rocker shaft, wherein the rocker shaft is fixedly arranged on a cylinder cover of a diesel engine, and an oil supply channel is arranged in the rocker shaft; a plurality of rocker arms are sleeved on the rocker arm shaft in a rotating mode, one end of each rocker arm is movably connected with a push rod, the push rods do reciprocating linear motion to drive the rocker arms to swing in a reciprocating mode relative to the rocker arm shaft, and the other ends of the rocker arms are movably connected with the valves; the rocker arm is provided with two first oil ducts, the rocker arm shaft is provided with two second oil ducts which are respectively communicated with the oil supply channels, when the push rod drives the rocker arm to rotate so that the rocker arm is abutted against the valve to open the valve, the two second oil ducts are communicated with the two first oil ducts in a one-to-one correspondence mode, and lubricating oil in the oil supply channels is respectively supplied to the push rod and the valve.
Furthermore, the end of the rocker arm is provided with a ball head, the top of the push rod is provided with a ball socket, and the ball head is movably arranged in the ball socket.
Further, the rocker arm is in clearance fit with the rocker shaft.
Further, the process of opening the valve sequentially comprises a first stage and a second stage: in the first stage, only the first oil passage leading to the valve is communicated with the corresponding second oil passage; in the second stage, only the first oil passage leading to the push rod is communicated with the corresponding second oil passage.
Further, the first oil passage leading to the valve includes two connected sections, and the bore diameter of one section thereof near the oil supply passage is larger than that of the other section.
The diesel engine further comprises a rocker arm shaft seat and a bolt, wherein the rocker arm shaft seat is sleeved on the rocker arm, and the bolt penetrates through the rocker arm shaft seat and the rocker arm and then is screwed on a cylinder cover of the diesel engine in a sealing manner.
Furthermore, the rocker arm limiting device further comprises a spring sleeved on the rocker arm shaft, and the rocker arm is abutted to the rocker arm shaft seat by the elastic force of the spring so as to limit the rocker arm.
Furthermore, elastic retainer rings are arranged at two ends of the rocker arm shaft and used for limiting the rocker arms at two ends of the rocker arm shaft.
Furthermore, two bowl-shaped plugs are respectively arranged at two ends of the rocker arm shaft and used for plugging two ends of the oil supply channel.
A diesel engine comprises a valve rocker mechanism, wherein the valve rocker mechanism is the valve rocker mechanism.
In the technical scheme, after the valve is closed, the two second oil ducts are staggered with the corresponding first oil ducts, lubricating oil in the second oil ducts cannot directly enter the corresponding first oil ducts, oil pressure in the oil supply channels is instantly increased, and a small amount of lubricating oil in the second oil ducts is pressed into a clearance in rotating fit between the rocker arm shaft and the rocker arm, so that the rocker arm and the rocker arm shaft are lubricated, a small amount of lubricating oil in the second oil ducts can enter the first oil ducts through the clearance between the rocker arm shaft and the rocker arm, and reaches the push rod and the valve from the first oil ducts, so that the valve is lubricated by a small amount of lubricating oil under the condition of small lubricating oil demand when the valve is closed; in the process that the rocker arm is driven by the push rod to rotate so that the rocker arm abuts against the valve to open the valve, the two second oil ducts are communicated with the two first oil ducts in a one-to-one correspondence mode, the pressure of lubricating oil in the oil supply channel is released, the lubricating oil is respectively supplied to the push rod and the valve through the second oil ducts and the first oil ducts to lubricate, the oil supply amount and the oil supply pressure are increased instantly, and the lubricating effect is good.
Due to the technical effects of the valve rocker mechanism, a diesel engine comprising the valve rocker mechanism also has corresponding technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
1-2 are schematic structural views of a valve rocker mechanism provided by an embodiment of the invention;
FIG. 3 is a cross-sectional view of the structure of FIG. 2 taken along line A-A in accordance with an embodiment of the present invention;
FIGS. 4-5 are cross-sectional views of the structure of FIG. 2 taken along line B-B in accordance with an embodiment of the present invention;
6-7 are schematic structural diagrams of diesel engines provided by embodiments of the present invention;
fig. 8 is a sectional view of a connection structure of the first inner ring, the first outer ring, and the first electromagnetic clutch according to the embodiment of the present invention.
Description of reference numerals:
1. a rocker shaft; 2. an oil supply passage; 3. a rocker arm; 4. a push rod; 5. an air valve; 6. a first oil passage; 7. a second oil passage; 8. a rocker shaft seat; 9. a bolt; 10. a spring; 11. a circlip; 12. a bowl-shaped plug; 13. an inner wheel train; 13.1, a first inner wheel; 13.2, driving wheels; 13.3, a second inner wheel; 13.4, double-sided V-ribbed belts; 14. an outer wheel train; 14.1, a first outer wheel; 14.11, a rotating part; 14.12, a pulley; 14.13, a clamping structure; 14.2, a second outer wheel; 14.3, a belt; 15. a heat radiation fan; 16. a heat-dissipating water pump; 17. a first clutch mechanism; 17.1, armature; 18. and a second clutch mechanism.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 8, a rocker arm 3 mechanism of a valve 5 according to an embodiment of the present invention includes a rocker arm shaft 1, the rocker arm shaft 1 is fixedly mounted on a cylinder head of a diesel engine, and an oil supply passage 2 is disposed inside the rocker arm shaft 1; the rocker arm shaft 1 is rotatably sleeved with a plurality of rocker arms 3, the rocker arms 3 are in clearance fit with the rocker arm shaft 1, one end of each rocker arm 3 is movably connected with a push rod 4, the push rods 4 do reciprocating linear motion to drive the rocker arms 3 to reciprocate relative to the rocker arm shaft 1, specifically, a ball head is arranged at the end part of each rocker arm 3, a ball socket is arranged at the top of each push rod 4, the ball head is movably arranged in the ball socket, the other end of each rocker arm 3 is movably connected with a valve 5, a screw and a nut for adjusting the clearance of the valve 5 are assembled on the valve 5, and the valve 5 refers to an inlet valve or an exhaust valve; the rocker arm 3 is provided with two first oil ducts 6, the rocker arm shaft 1 is provided with two second oil ducts 7 which are respectively communicated with the oil supply channel 2, when the push rod 4 drives the rocker arm 3 to rotate so that the rocker arm 3 abuts against the valve 5 to open the valve 5, the two second oil ducts 7 are communicated with the two first oil ducts 6 in a one-to-one correspondence mode, and lubricating oil in the oil supply channel 2 is respectively supplied to the push rod 4 and the valve 5.
In the above technical solution, according to the rocker arm 3 mechanism of the valve 5 provided by the invention, after the valve 5 is closed, the two second oil ducts 7 are dislocated with the corresponding first oil ducts 6, the lubricating oil in the second oil ducts 7 cannot directly enter the corresponding first oil ducts 6, the oil pressure in the oil supply channel 2 is instantly increased, a small amount of lubricating oil in the second oil ducts 7 is pressed into the clearance between the rocker arm shaft 1 and the rocker arm 3 in a rotating fit manner, so that not only is the lubrication of the rocker arm 3 and the rocker arm shaft 1 realized (which also enables the present invention to eliminate the valve 5 rocker arm 3 bushing which is necessary for the conventional valve 5 rocker arm 3 mechanism, thereby enabling the valve 5 rocker arm 3 mechanism to be more simplified), but also a small amount of lubricating oil in the second oil ducts 7 can enter the first oil ducts 6 through the clearance between the rocker arm shaft 1 and the rocker arm 3, and reaches the push rod 4 and the valve 5 from the first oil ducts 6, so that a small amount of lubricating oil still exists to lubricate the valve 5 under the condition that the lubricating oil demand is small when the valve is closed; in the process that the push rod 4 drives the rocker arm 3 to rotate so that the rocker arm 3 abuts against the valve 5 to open the valve 5, the two second oil ducts 7 are communicated with the two first oil ducts 6 in a one-to-one correspondence mode, the pressure of lubricating oil in the oil supply channel 2 is released, the lubricating oil is supplied to the push rod 4 and the valve 5 through the second oil ducts 7 and the first oil ducts 6 respectively to be lubricated, the oil supply amount and the oil supply pressure are increased instantly, and the lubricating effect is good.
In the technical scheme, the process of opening the valve 5 has three conditions, the first condition is that the two second oil passages 7 are simultaneously communicated with the corresponding first oil passages 6 to realize intermittent oil supply, and the effect is achieved; the second case is that the process of opening the valve 5 includes a first stage and a second stage in this order: in the first phase, only the first oil channel 6 leading to the valve 5 communicates with the corresponding second oil channel 7; as the rocker arm 3 continues to rotate relative to the rocker shaft 1, in the second phase, only the first oil passage 6 leading to the pushrod 4 communicates with the corresponding second oil passage 7. Further, the first oil passage 6 leading to the valve 5 includes two connected sections, and the bore diameter of one section near the oil supply passage 2 is larger than that of the other section (the section near the valve 5), forming a nozzle structure, so that the lubricating oil in the first oil passage 6 is sprayed toward the valve 5 when the valve 5 is opened. In the second case, therefore, during the opening of the valve 5, an intermittent oil supply between the valve 5 and the push rod 4 is also achieved, so that in the first stage, the oil pressure in the oil supply channel 2 can be released only to the valve 5, and under a greater oil pressure, the first oil passage 6 leading to the valve 5 injects oil better to the valve 5, and the injected lubricating oil can enter deeper into the valve 5.
In the third case, the process of opening the valve 5 comprises, in sequence, a first phase and a second phase: in the first phase, only the first oil channel 6 leading to the valve 5 communicates with the corresponding second oil channel 7; as the rocker arm 3 continues to rotate relative to the rocker shaft 1, in the second stage, the first oil passage 6 leading to the push rod 4 is also communicated with the corresponding second oil passage 7, but at this time, the first oil passage 6 leading to the valve 5 is still communicated with the corresponding second oil passage 7, and structurally, the diameter of the first oil passage 6 corresponding to the valve 5 is only required to be larger than the diameter of the correspondingly derived first oil passage 6 and/or the diameter of the second oil passage 7 corresponding to the valve 5 is larger than the diameter of the correspondingly derived second oil passage 7. Therefore, in the first stage of the opening process of the valve 5, the oil pressure in the oil supply channel 2 can be released only to the valve 5, under the condition of higher oil pressure, the oil injection effect of the first oil channel 6 leading to the valve 5 is better, the injected lubricating oil can enter the deeper part of the valve 5, and in the second stage, the oil supply channel 2 simultaneously provides the lubricating oil for the push rod 4 and the valve 5, but the oil pressure is smaller.
According to the traditional technology adopted by the connection of the rocker shaft 1 and the cylinder cover of the multi-cylinder diesel engine at present, the rocker shaft 1 penetrates through the rocker shaft seat 8, and two bolts 9 on the rocker shaft seat 8 are fixed on the cylinder cover of the diesel engine to complete the fixation, so that the cylinder cover needs to be added with corresponding lugs, the weight of the cylinder cover is increased, and the processing procedure and the cost are increased. In another embodiment provided by the invention, the diesel engine further comprises a rocker arm shaft seat 8 and a bolt 9, wherein the rocker arm shaft seat 8 is sleeved on the rocker arm 3, and the bolt 9 penetrates through the rocker arm shaft seat 8 and the rocker arm 3 and is then screwed on a cylinder cover of the diesel engine in a sealing manner. Further, still include the spring 10 of cover locating on rocking arm axle 1, the elasticity of spring 10 is with rocking arm 3 butt to rocking arm axle bed 8 on in order to carry out spacing to rocking arm 3. Furthermore, elastic retainer rings 11 are arranged at two ends of the rocker arm shaft 1, and the elastic retainer rings 11 are used for limiting the rocker arms 3 at the two ends of the rocker arm shaft 1. Further, two bowl-shaped plugs 12 are respectively arranged at two ends of the rocker arm shaft 1, and the two bowl-shaped plugs 12 are used for plugging two ends of the oil supply channel 2.
In this embodiment, rocker shaft 1 is held to rocker shaft seat 8, and rocker shaft seat 8 is U-shaped or Y-shaped, and bolt 9 runs through rocker shaft seat 8 and rocker shaft 1 simultaneously the back and the cylinder cap spiro union, realizes that rocker shaft seat 8, rocker shaft 1 and cylinder cap three connect simultaneously, and overall simple structure, weight is low, and fixed lug reduces on the cylinder cap, manufacturing procedure and weight reduction, compact structure, greatly reduced manufacturing cost.
As a preferred technical solution of this embodiment, the bolt 9 passes through the oil supply channel 2 when passing through the rocker shaft 1, and the bolt 9 is screwed to the cylinder head, and then the end of the bolt 9 is exposed to the outside of the cylinder head, and a third oil passage is opened inside the bolt 9, and one end of the third oil passage is communicated with the oil supply channel 2, and the other end is communicated with the outside of the cylinder head and is communicated with an oil supply pipeline. This can further simplify the structure of the cylinder head and the rocker shaft 1.
The invention also provides a diesel engine which comprises the valve 5 rocker arm 3 mechanism and further comprises a cooling system, referring to fig. 6-7, the cooling system comprises an inner wheel train 13 and an outer wheel train 14, the inner wheel train 13 comprises a driving wheel 13.2, a first inner wheel 13.1, a second inner wheel 13.3, a double-faced V-belt 13.4 and a first tensioning wheel, and the outer wheel train 14 comprises a first outer wheel 14.1, a second outer wheel 14.2, a belt 14.3 and a second tensioning wheel. The first inner wheel 13.1 drives a heat-dissipating water pump 16 of the diesel engine to operate, the first outer wheel 14.1 is provided with a heat-dissipating fan 15, the driving wheel 13.2 is connected to a crankshaft of the diesel engine and is driven by the crankshaft, the inner side of the double-sided poly-wedge belt 13.4 is sleeved on the driving wheel 13.2 and the first inner wheel 13.1, the outer side of the double-sided poly-wedge belt 13.4 is sleeved on the second inner wheel 13.3, the first inner wheel 13.1 of the inner wheel train 13 drives the heat-dissipating water pump 16 of the diesel engine to operate, the first tensioning wheel is used for tensioning the double-sided poly-wedge belt 13.4, the belt 14.3 is sleeved on the second outer wheel 14.2 and the first outer wheel 14.1, and the second tensioning wheel is used for tensioning the belt 14.3. The first outer wheel 14.1 is coaxially connected with the inner first inner wheel 13.1, and also comprises a first clutch mechanism 17 for driving the first outer wheel 14.1 to be clutched with the first inner wheel 13.1, and a second clutch mechanism 18 for driving the second outer wheel 14.2 to be clutched with the second inner wheel 13.3; when only the first clutch mechanism 17 is attracted, namely the first clutch mechanism 17 attracts the first inner wheel 13.1 and the first outer wheel 14.1, and when the second clutch mechanism 18 is detached from the attraction, the first inner wheel 13.1 drives the cooling fan 15 to rotate through the first outer wheel 14.1 to blow air to the water tank radiator of the diesel engine; when only the second clutch mechanism 18 is engaged, the outer wheel set 14 is driven by the second inner wheel 13.3 to reverse the direction of suction of the radiator fan 15 towards the radiator of the diesel engine.
In the technical scheme, the inner gear train 13 is driven by a crankshaft of the diesel engine through a driving wheel 13.2 and then is transmitted to a first inner wheel 13.1 through a double-sided V-belt 13.4, and the first inner wheel 13.1 drives a radiating water pump 16 of the diesel engine to run so as to radiate heat of the diesel engine. When the first clutch mechanism 17 is actuated, that is, the first clutch mechanism 17 actuates the first inner wheel 13.1 to be actuated with the first outer wheel 14.1, and the second clutch mechanism 18 is disengaged, the inner wheel train 13 drives the first outer wheel 14.1 to rotate through the first inner wheel 13.1 while driving the heat dissipation water pump 16 to operate, and the first outer wheel 14.1 drives the heat dissipation fan 15 to rotate forward to blow air to the water tank radiator, thereby accelerating heat exchange between the water tank radiator and air. The process that radiator fan 15 bloies to the water tank radiator lasts longer time after, can lead to the garrulous end of crop to be attached to the water tank radiator of diesel engine gradually, when the garrulous end of crop on the water tank radiator accumulated a certain amount, though radiator fan 15 bloies to the water tank radiator, still can lead to the heat of water tank radiator in can't giving off the air. Therefore, the first clutch mechanism 17 needs to be disengaged, the transmission between the first outer wheel 14.1 and the first inner wheel 13.1 is cut off, after the cooling fan 15 stops rotating under wind resistance, then the second clutch mechanism 18 is actuated, the second outer wheel 14.2 and the second inner wheel 13.3 are transmitted, because the outer side of the double-sided V-belt 13.4 is sleeved on the second inner wheel 13.3, the rotation direction of the second inner wheel 13.3 is opposite to the rotation direction of the first inner wheel 13.1, so that the rotation direction of the second outer wheel 14.2 relative to the first inner wheel 13.1 is opposite, the second outer wheel 14.2 drives the first outer wheel 14.1 to rotate through the transmission component, thereby realizing that the heat radiation fan 15 reversely rotates to suck air towards the radiator of the water tank, and then the crop scraps attached to the water tank radiator are sucked away, so that the heat exchange efficiency between the water tank radiator and the air is promoted, and the crop scraps on the water tank radiator can be cleaned under the conditions that the diesel engine does not stop and the heat dissipation water pump 16 does not stop. After the crop dust attached to the radiator of the water tank is completely sucked, the second clutch mechanism 18 is separated from the suction and the first clutch mechanism 17 is sucked, so that the cooling fan 15 rotates forwards.
Preferably, the first clutch mechanism 17 is preferably a first electromagnetic clutch; the second clutch mechanism 18 is preferably a second electromagnetic clutch.
In another embodiment provided by the invention, referring to fig. 8, the first outer wheel 14.1 comprises a rotating part 14.11 and a belt pulley 14.12, the belt pulley 14.12 is rotatably connected to the rotating part 14.11, the cooling fan 15 is fixedly installed on the rotating part 14.11, the rotating part 14.11 is coaxially and rotatably connected with the first inner wheel 13.1, the rotating part 14.11 is slidably connected with an armature 17.1 of the first electromagnetic clutch, the sliding direction is the axial direction of the rotating part 14.11, and a clamping structure 14.13 is arranged between the armature 17.1 of the first electromagnetic clutch and the end surface of the belt pulley 14.12; when the first electromagnetic clutch is disconnected (disengaged) from the attraction, the armature 17.1 of the first electromagnetic clutch slides to be close to the belt wheel 14.12 under the elastic force of the return spring 10 to enable the clamping structure 14.13 to be clamped; when the first electromagnetic clutch is in an engaged state, the engaging structure 14.13 is disengaged, and specifically, the engaging structure 14.13 includes at least one first engaging portion fixedly connected to the armature 17.1 of the first electromagnetic clutch, and at least one second engaging portion fixedly connected to the end surface of the belt pulley 14.12.
In the embodiment, when the first electromagnetic clutch is attracted, the engaging mechanism is disengaged, the first inner wheel 13.1 drives the cooling fan 15 to rotate forward to blow air to the radiator of the water tank through the rotating part 14.11, only the rotating part 14.11 in the outer wheel train 14 rotates, and other components including the belt wheel 14.12 do not rotate, so that the transmission power of the inner wheel train 13 can be saved, and the energy consumption of a diesel engine can be saved; when the heat dissipation performance of the water tank radiator is reduced after a large amount of crop debris is attached to the water tank radiator, the first clutch mechanism 17 is disengaged from actuation, the armature 17.1 of the first electromagnetic clutch slides under the elastic force of the return spring 10 to be close to the belt pulley 14.12 so as to enable the clamping structure 14.13 to be clamped, and at the moment, the residual rotational inertia of the heat dissipation fan 15 overcomes the wind resistance and drives the original static outer wheel train 14 to rotate, so that the stop of the heat dissipation fan 15 can be accelerated, and the time that the heat dissipation fan 15 does not perform heat dissipation operation on the water tank radiator is shortened; when the cooling fan 15 stops rotating, the second clutch mechanism 18 is actuated, the second inner wheel 13.3 drives the outer wheel train 14 to rotate through the second outer wheel 14.2, and the belt wheel 14.12 of the first outer wheel 14.1 drives the rotating part 14.11 to rotate, so that the cooling fan 15 is driven to reversely rotate to suck air to the radiator of the water tank.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (10)
1. A valve rocker mechanism is characterized by comprising a rocker shaft, wherein the rocker shaft is fixedly arranged on a cylinder cover of a diesel engine and is internally provided with an oil supply channel;
a plurality of rocker arms are sleeved on the rocker arm shaft in a rotating mode, one end of each rocker arm is movably connected with a push rod, the push rods do reciprocating linear motion to drive the rocker arms to swing in a reciprocating mode relative to the rocker arm shaft, and the other ends of the rocker arms are movably connected with the valves;
the rocker arm is provided with two first oil ducts, the rocker arm shaft is provided with two second oil ducts which are respectively communicated with the oil supply channels, when the push rod drives the rocker arm to rotate so that the rocker arm is abutted against the valve to open the valve, the two second oil ducts are communicated with the two first oil ducts in a one-to-one correspondence mode, and lubricating oil in the oil supply channels is respectively supplied to the push rod and the valve.
2. The valve rocker mechanism of claim 1, wherein the rocker arm is provided with a ball at an end thereof, and the push rod is provided with a ball socket at a top thereof, the ball being movably disposed in the ball socket.
3. A valve rocker mechanism as claimed in claim 1, wherein the rocker arm is in clearance fit with the rocker shaft.
4. A valve train as claimed in claim 1, characterized in that the valve opening sequence comprises a first phase and a second phase: in the first stage, only the first oil passage leading to the valve is communicated with the corresponding second oil passage; in the second stage, only the first oil passage leading to the push rod is communicated with the corresponding second oil passage.
5. A valve rocker mechanism according to claim 1, characterized in that the first oil passage leading to the valve comprises two connected sections, the bore diameter of one section adjacent the oil supply channel being larger than the bore diameter of the other section.
6. The valve rocker mechanism of claim 1, further comprising a rocker shaft seat and a bolt, wherein the rocker shaft seat is sleeved on the rocker, and the bolt penetrates through the rocker shaft seat and the rocker and then is screwed on a cylinder cover of the diesel engine in a sealing manner.
7. The valve rocker mechanism of claim 6, further comprising a spring sleeved on the rocker shaft, wherein the spring force of the spring abuts the rocker arm against the rocker shaft seat to limit the rocker arm.
8. The valve rocker mechanism of claim 7, wherein the rocker shaft is provided with circlips at both ends for limiting the rocker arms at both ends of the rocker shaft.
9. The valve rocker mechanism of claim 1, wherein a bowl-shaped plug is respectively arranged at two ends of the rocker shaft, and the two bowl-shaped plugs are used for plugging two ends of the oil supply channel.
10. A diesel engine comprising a valve rocker mechanism as claimed in any one of claims 1 to 9.
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| CN202210493741.2A CN114810267B (en) | 2022-04-27 | 2022-04-27 | Valve rocker mechanism and diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210493741.2A CN114810267B (en) | 2022-04-27 | 2022-04-27 | Valve rocker mechanism and diesel engine |
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| CN114810267A true CN114810267A (en) | 2022-07-29 |
| CN114810267B CN114810267B (en) | 2023-02-03 |
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| JP2003247410A (en) * | 2002-02-21 | 2003-09-05 | Otics Corp | Lubricant supply system |
| CN102330585A (en) * | 2011-08-05 | 2012-01-25 | 无锡开普动力有限公司 | Lubrication mechanism of valve rocker |
| CN202883042U (en) * | 2012-10-28 | 2013-04-17 | 长城汽车股份有限公司 | Automobile engine valve rocker lubricating structure |
| CN204457925U (en) * | 2014-12-27 | 2015-07-08 | 潍柴动力股份有限公司 | A kind of rocker arm bush lubricating structure |
| JP2017186928A (en) * | 2016-04-04 | 2017-10-12 | 大豊工業株式会社 | Lubrication oil supply mechanism |
| CN207377621U (en) * | 2017-10-27 | 2018-05-18 | 广西玉柴机器股份有限公司 | The lubrication system of V-type diesel camshaft |
| CN209908585U (en) * | 2019-04-23 | 2020-01-07 | 东风商用车有限公司 | Rocker arm axial limiting structure |
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| CN114810267B (en) | 2023-02-03 |
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