WO2021019846A1 - Engrenage de soupape pour moteur - Google Patents

Engrenage de soupape pour moteur Download PDF

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Publication number
WO2021019846A1
WO2021019846A1 PCT/JP2020/016418 JP2020016418W WO2021019846A1 WO 2021019846 A1 WO2021019846 A1 WO 2021019846A1 JP 2020016418 W JP2020016418 W JP 2020016418W WO 2021019846 A1 WO2021019846 A1 WO 2021019846A1
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WIPO (PCT)
Prior art keywords
valve
oil
engine
input
valve gear
Prior art date
Application number
PCT/JP2020/016418
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English (en)
Japanese (ja)
Inventor
真琴 山内
諭 長谷川
佑樹 平河
翔太郎 是永
信裕 山本
Original Assignee
株式会社クボタ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 株式会社クボタ filed Critical 株式会社クボタ
Priority to CN202080035237.7A priority Critical patent/CN113811672A/zh
Publication of WO2021019846A1 publication Critical patent/WO2021019846A1/fr

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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
    • F01L1/14—Tappets; Push rods
    • 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

Definitions

  • the present invention relates to an engine valve gear, and more particularly to an engine valve gear that enhances the lubricity of a valve drive unit.
  • an engine valve gear with an exhaust or intake valve (104) driven via 102) (see, eg, Patent Document 1).
  • the rocker arm (102) includes an arm portion (105) and an oil outflow boss portion (108), and the oil outflow boss portion (108) is An oil outflow surface (109) formed on the upper surface, an oil outflow hole (110) opened at the center of the oil outflow surface (109), a peripheral surface (108a), an oil outflow surface (109), and a peripheral surface.
  • boundary edges (111) (111) formed at the boundary of (108a) are provided, and the boundary edges (111) (111) are lateral edges (114) (114) on both sides of the oil outflow surface (109). 114) only, and as shown in FIG. 15 (A), the boundary edge portion (111) is not formed on the input / output portion side (112a) (115a) of the oil outflow surface (109), and the oil outflow
  • the input / output portion side (112a) (115a) of the surface (109) is flush with the upper surface (105a) of the arm portion (105).
  • the lubricity of the valve drive unit may deteriorate.
  • the engine oil that has flowed out from the oil outflow hole (110) to the oil outflow surface (109) flows down from the side edge portions (114) (114) by its own weight, so that it easily flows to both side sides. It is difficult to flow to the input / output portions (112a) and (115a) due to the flow resistance received from the upper surface of the arm portion (105). Further, the engine oil (113) is particularly difficult to flow to the input end portion (106) side that is lifted during the valve opening period of the valve (104). Therefore, it is difficult for the engine oil (113) to be supplied to the valve drive portion (103) on the input end portion (106) side, and the lubricity of the valve drive portion (103) may be lowered.
  • An object of the present invention is to provide an engine valve gear that improves the lubricity of a valve drive unit.
  • the configuration of the present invention is as follows. As illustrated in FIG. 1 (C), the pivot (1), the rocker arm (2) pivotally supported by the pivot (1), the valve drive unit (3), and the valve drive unit (3) to the rocker arm (2). ) Is provided with an exhaust or intake valve (4) driven via As illustrated in FIG. 1 (B), the rocker arm (2) includes an arm portion (5) in a direction intersecting the pivot axis (1), an input portion (6) on one end side of the arm portion (5), and an arm. The output portion (7) on the other end side of the portion (5) and the oil outflow boss portion (8) are provided. As illustrated in FIG.
  • the oil outflow boss portion (8) has an oil outflow surface (9) formed on the upper surface and an oil outflow hole opened at the center of the oil outflow surface (9).
  • 10 a peripheral surface (8a), and a boundary edge portion (11) formed at the boundary between the oil outflow surface (9) and the peripheral surface (8a) are provided.
  • the boundary edge portion (11) includes an input portion side edge portion (12) on the input portion (6) side, and engine oil (13) overflowing from the oil outflow hole (10) to the oil outflow surface (9) is input.
  • the engine is characterized in that it is configured to flow down from the side edge portion (12) and be supplied to the valve drive portion (3) on the input portion (6) side illustrated in FIG. 1 (C). Valve gear.
  • the invention of the present application has the following effects.
  • ⁇ Effect >> The lubricity of the valve drive unit (3) is improved.
  • the engine oil (13) that has flowed out from the oil outflow hole (10) illustrated in FIG. 1 (A) to the oil outflow surface (9) flows down from the input portion side edge portion (12) by its own weight.
  • It is easy to flow to the input unit (6) side and the engine oil (13) is sufficiently supplied to the valve drive unit (3) on the input unit (6) side illustrated in FIG. 1 (C), and the valve drive unit (3)
  • the lubricity of the engine is increased.
  • FIG. 1A is an enlarged plan view of a main part of a rocker arm
  • FIG. 1B is a plan view of the rocker arm
  • FIG. 1C is a view for explaining a basic example of an engine valve gear according to an embodiment of the present invention.
  • FIG. 2A shows a valve in a fully open state
  • FIG. 2B shows a valve in a fully closed state. There is.
  • FIG. 3A shows the valve opening period
  • FIG. 3A shows the valve opening period
  • FIG. 3B shows the opening / closing period of the exhaust valve
  • FIG. 3C shows the opening / closing period of the intake valve. Shown. It is a top view of the cylinder head provided with the basic example of a valve gear. It is a vertical sectional side view of the cylinder head of FIG. 4 and its periphery. It is a figure corresponding to FIG. 1 (C) of the modification 1 of the valve gear.
  • FIG. 7A is a view corresponding to FIG. 1C
  • FIG. 7B is an enlarged view of an oil outflow boss portion, which is a diagram for explaining a modified example 2 of the valve gear. It is a figure corresponding to FIG. 1 (C) of the modification 3 of the valve gear.
  • 9 (A) is a diagram corresponding to FIG.
  • FIG. 1 (B), and FIG. 9 (B) is a diagram corresponding to FIG. 1 (C), which is a diagram for explaining a modified example 4 of the valve gear. It is a figure corresponding to FIG. 1 (C) of the modification 5 of the valve gear. It is a figure corresponding to FIG. 1 (C) of the modification 6 of the valve gear.
  • FIG. 12A is a basic example
  • FIG. 12B is a modification 7.
  • FIG. 13A is a basic example
  • FIG. 13B is a modification 8.
  • FIG. 14 (A) is a plan view of the rocker arm
  • FIG. 14 (B) is a sectional view taken along line BB of FIG. 14 (A)
  • 14 (C) is a view for explaining a modified example 9 of the valve gear.
  • 14 (A) is a sectional view taken along line CC.
  • 15 (A) is a side view
  • FIG. 15 (B) is a sectional view taken along line BB of FIG. 15 (A), which is a diagram for explaining an engine valve gear according to a prior art document.
  • FIGS. 1 to 14 are views for explaining the valve gear of the engine according to the embodiment of the present invention
  • FIGS. 1 to 5 are basic examples of the valve gear
  • FIGS. 6 to 14 are modified examples 1 of the valve gear.
  • ⁇ 9 is shown.
  • a vertical 4-cycle in-line multi-cylinder diesel engine including an overhead valve type valve gear will be described.
  • the engine provided with the valve gear includes a cylinder block (29), a cylinder head (30) assembled on the upper part of the cylinder block (29), and a cylinder head ( A head cover (31) assembled to the upper part of the 30) is provided.
  • the valve gear includes a pivot (1), a rocker arm (2) pivotally supported by the pivot (1), a valve drive unit (3), and a valve drive unit (3). It is equipped with a valve (4) driven via a rocker arm (2).
  • the valve drive unit (3) has a valve cam shaft (32) and a tappet (28) on the valve cam (32a) of the valve cam shaft (32). And a push rod (27) between the tappet (28) and the rocker arm (2).
  • the valve (4) shown in FIGS. 2A and 2B is an exhaust valve.
  • the intake valve is also driven by the same mechanism as the exhaust valve.
  • a valve cap (33) is attached to the upper end of the valve (4), and the valve cap (33) is brought into contact with the output portion (7) of the rocker arm (2).
  • a spring receiver (34) is attached to the valve (4), a compressed valve spring (35) is arranged between the spring receiver (34) and the cylinder head (30), and the valve (4) is a valve spring (35).
  • the rocker arm (2), the push rod (27) and the tappet (28) shown in FIG. 5 correspond to the three pairs of valves (4) having the exhaust valve and the intake valve as a pair. And, three pairs of valve cams (32a) are provided.
  • the three pairs of rocker arms (2) are pivotally supported by pivots (1) erected on three rocker arm brackets (36) on the cylinder head (30).
  • the rocker arm (2) has an arm portion (5) in a direction intersecting the pivot axis (1), an input portion (6) on one end side of the arm portion (5), and an arm portion. It is provided with an output portion (7) on the other end side of (5) and an oil outflow boss portion (8).
  • the oil outflow boss portion (8) has an oil outflow surface (9) formed on the upper surface and an oil outflow hole (9) opened at the center of the oil outflow surface (9). It is provided with a boundary edge (11) formed at the boundary between the peripheral surface (8a), the oil outflow surface (9), and the peripheral surface (8a).
  • the boundary edge portion (11) is provided with an input portion side edge portion (12) on the input portion (6) side, and engine oil (13) overflowing from the oil outflow hole (10) to the oil outflow surface (9) is input. It is configured to flow down from the side edge portion (12) and be supplied to the valve drive portion (3) on the input portion (6) side shown in FIG. 1 (C).
  • the engine oil (13) that has flowed out from the oil outflow hole (10) shown in FIG. 1A to the oil outflow surface (9) flows down from the input portion side edge portion (12) by its own weight. It is easy to flow to the input unit (6) side, and the engine oil (13) is sufficiently supplied to the valve drive unit (3) on the input unit (6) side shown in FIG. 1 (C) to lubricate the valve drive unit (3). The sex becomes high.
  • the oil supply path consists of an oil strainer (38) immersed in the engine oil (13) of the oil pan (37) and an oil pump (39) connected to the outlet side of the oil strainer (38). ),
  • the oil gallery (42) connected to the discharge side of the oil pump (39), the shaft center passage (22) of the pivot shaft (1) connected to the outlet side of the oil gallery (42), and the shaft center passage. It is provided with a shaft peripheral wall hole (24) derived from the pivot (1) through the shaft peripheral wall (23) of the pivot (1) and a fitting gap (1a) between the pivot (1) and the rocker arm (2).
  • the engine oil (13) of the oil pan (37) passes through the oil supply path in the order described above, and is supplied to the oil outflow hole (10) of the rocker arm (2).
  • the boundary edge portion (11) includes lateral edge portions (14) (14) in the axial length direction of the pivot axis (1).
  • the input section side flow path (12a) from the oil outflow hole (10) to the input section side edge portion (12) is the side flow path from the oil outflow hole (10) to the side side edge portions (14) (14). (14a) It is configured to be shorter than (14a).
  • the engine oil (13) that has flowed out from the oil outflow hole (10) shown in FIG. 1 (A) to the oil outflow surface (9) is less susceptible to flow resistance than the side flow path (14a). Since a large amount of oil flows to the input unit (6) side through the input unit side flow path (12a), the engine oil (13) is sufficiently supplied to the valve drive unit (3) on the input unit (6) side shown in FIG. 1 (C). It is supplied and the lubricity of the valve drive unit (3) is improved.
  • the output section side flow path (15a) from the oil outflow hole (10) to the output section side edge portion (15) is formed from the oil outflow hole (10) to the side edge portion (14). ) (14), it is configured to be shorter than the side flow paths (14a) and (14a).
  • the engine oil (13) that has flowed out from the oil outflow hole (10) shown in FIG. 1 (A) to the oil outflow surface (9) is less susceptible to flow resistance than the side flow path (14a). Since a large amount of oil flows to the output unit (7) side via the output unit side flow path (15a), the engine oil (13) is sufficiently supplied to the valve (4) on the output unit (7) side shown in FIG. 1 (C). , The lubricity of the valve (4) is improved.
  • the longitudinal direction of the arm portion (5) is the input / output direction
  • the axial length direction of the pivot (1) is the width direction
  • the oil outflow surface (9) is the length in the input / output direction.
  • (9a) has a shape shorter than the length (9b) in the width direction.
  • the engine oil (13) that has flowed out from the oil outflow hole (10) shown in FIG. 1A to the oil outflow surface (9) flows more than the flow paths (14a) and (14a) on both sides. Since a large amount of oil flows to the input / output units (6) (7) side via the input / output unit side flow paths (12a) (15a) that are less susceptible to resistance, the input / output units (6) (7) side shown in FIG. 1 (C).
  • the engine oil (13) is sufficiently supplied to the valve drive unit (3) and the valve (4), and the lubricity of the valve drive unit (3) and the valve (4) is improved.
  • the oil outflow surface (9) is formed in an oval shape long in the width direction in a plan view.
  • the oil outflow surface (9) may be an ellipse or a rectangle long in the width direction in a plan view.
  • the oil outflow surface (9) is oriented in the horizontal direction as shown in FIG. 1C. It is oriented.
  • the engine oil (13) that has flowed out from the oil outflow hole (10) shown in FIG. 1 (A) to the oil outflow surface (9) is shown in FIGS. 3 (B) and (C) of the valve (4).
  • the oil flows down from the input / output unit side edges (12) (15) shown in FIG. 1 (C) by its own weight, so that the input / output units (6) and (7) sides
  • the engine oil (13) is sufficiently supplied to the valve drive unit (3) on the input / output unit (6) (7) side and the valve (4) on the output unit (7) side, and the valve drive unit (3) )
  • the valve (4) have higher lubricity.
  • the fully closed periods (4a) and (4b) of the valve (4) shown in FIGS. 3B and 3C are set as follows.
  • the valve opening period of the exhaust valve is set to 230 ° at the crank angle while the crankshaft makes two rotations in one combustion cycle
  • the valve opening period of the intake valve is set at the crank angle. It is set to 228 °. Therefore, as shown in FIG. 3B, the fully closed period (4a) of the exhaust valve is set to 490 °, which is obtained by subtracting the valve opening period 230 ° of the exhaust valve from 720 ° in which the crankshaft rotates twice. .. Further, as shown in FIG. 3C, the fully closed period (4b) of the intake valve is set to 492 °, which is obtained by subtracting the valve opening period 228 ° of the intake valve from 720 ° in which the crankshaft rotates twice.
  • the rocker arm (2) inputs the engine oil (13) that has flowed down from the oil outflow boss portion (8) to the upper surface of the arm portion (5) to the input portion (6). It is provided with a guide surface (16) on the input unit side for guiding to.
  • the input unit side guide surface (16) is the input unit (6). It is sloping down toward.
  • the engine oil (13) that has flowed down to the upper surface of the arm portion (5) shown in FIGS. 1A and 1C is compared with those shown in FIGS. 3B and 3C of the valve (4).
  • the oil flows to the input unit (6) side along the downwardly inclined input unit side guide surface (16) shown in FIG. 1 (C), so that the input unit (6) side
  • the engine oil (13) is sufficiently supplied to the valve drive unit (3), and the lubricity of the valve drive unit (3) is improved.
  • the rocker arm (2) outputs the engine oil (13) that has flowed down from the oil outflow boss portion (8) to the upper surface of the arm portion (5). It is provided with an output unit side guide surface (17) for guiding to.
  • the output unit side guide surface (17) is the output unit (7). It is sloping down toward.
  • the engine oil (13) that has flowed down to the upper surface of the arm portion (5) shown in FIGS. 1A and 1C is compared with those shown in FIGS. 3B and 3C of the valve (4).
  • the oil flows to the output unit (7) side along the downwardly inclined output unit side guide surface (17) shown in FIG. 1 (C), so that the output unit (7) side
  • the engine oil (13) is sufficiently supplied to the valve (4), and the lubricity of the valve (4) is improved.
  • the downward inclination angle (16a) of the input portion side guide surface (16) ) Is configured to be larger than the downward inclination angle (17a) of the output unit side guide surface (17).
  • the engine oil (13) that has flowed down to the upper surface of the arm portion (5) shown in FIGS. 1A and 1C is compared with those shown in FIGS. 3B and 3C of the valve (4).
  • the downward inclination angle (16a) shown in FIG. 1C is large, and the oil flows to the input unit (6) side along the input unit side guide surface (16).
  • the engine oil (13) is sufficiently supplied to the valve drive portion (3) on the portion (6) side, and the lubricity of the valve drive portion (3) is improved.
  • the downward inclination angle (16a) of the input portion side guide surface (16) ) Is four times the downward inclination angle (17a) of the output unit side guide surface (17). This value is preferably 2 to 6 times, more preferably 3 to 5 times, and most preferably 4 times.
  • the above value is set to 2 to 6 times, the following effects can be obtained. If the value is less than 2 times, or if the value exceeds 6 times, the supply balance of the engine oil (13) to the input unit (6) side and the output unit (7) side is lost, and in the former The input unit (6) side may be in short supply, and the output unit (7) side may be in short supply in the latter case, whereas in the case of 2 to 6 times, the supply balance is good and the valve drive unit (3) And the valve (4) is lubricated without excess or deficiency. When the value is 3 to 5 times, a good supply balance is more reliably obtained, and when the value is 4 times, the best supply balance is obtained.
  • the downward inclination angle (16a) of the input unit side guide surface (16) and the downward inclination angle (17a) of the output unit side guide surface (17) shown in FIG. 1 (C) were measured as follows. As shown in FIG. 1 (C), the horizontal virtual line passing through the apex that is the boundary between the input unit side guide surface (16) and the output unit side guide surface (17) is set as the reference line (40), and the reference line is relative to this reference line. The dip angles of the input / output unit side guide surfaces (16) and (17) were measured as these downward inclination angles (16a) and (17a). Since the output unit side guide surface (17) shown in FIG. 1C is a flat surface without undulations, the downward inclination angle (17a) is 7 ° regardless of the measurement location.
  • the guide surface (16) on the input portion side shown in FIG. 1 (C) is an S-shaped curved surface with gentle undulations, and the tangential dip angles differ depending on the measurement points. Therefore, the tangent dip angles at a plurality of measurement points are measured.
  • the downward inclination angle (16a) is 28 °.
  • the downward inclination angle (16a) of the input unit side guide surface (16) is four times the downward inclination angle (17a) of the output unit side guide surface (17).
  • the downward inclination angle (16a) of the input unit side guide surface (16) and the downward inclination angle (17a) of the output unit side guide surface (17) are larger than those of the basic example. Is. Since the output unit side guide surface (17) shown in FIG. 6 is a flat surface without undulations, the downward inclination angle (17a) is 10 ° regardless of the measurement location. Since the input portion side guide surface (16) shown in FIG. 6 is also a flat surface without undulations, the downward inclination angle (16a) is 40 ° regardless of the measurement location. The downward inclination angle (16a) of the input unit side guide surface (16) is four times the downward inclination angle (17a) of the output unit side guide surface (17).
  • the oil outflow surface (9) is horizontal during the fully closed period (4a) (4b) of the valve (4) shown in FIGS. 3 (B) and 3 (C).
  • the modified example 2 shown in FIGS. 7 (A) and 7 (B) is shown in the fully closed period (4a) (4b) shown in FIGS. 3 (B) and 3 (C) of the valve (4).
  • the oil outflow surface (9) is oriented so as to incline downward toward the input portion (6).
  • the engine oil (13) that has flowed out from the oil outflow hole (10) shown in FIG. 7 (A) to the oil outflow surface (9) is in FIG. 3 (B) of the valve (4).
  • the oil flows toward the input portion (6) along the downwardly inclined oil outflow surface (9).
  • the engine oil (13) is sufficiently supplied to the valve drive unit (3) on the input unit (6) side, and the lubricity of the valve drive unit (3) is improved.
  • the downward inclination angle (9c) of the oil outflow surface (9) shown in FIGS. 7A and 7B was measured as follows. As shown in FIG. 7B, the horizontal virtual line passing through the apex of the oil outflow surface (9) is set as the reference line (41), and the dip angle of the oil outflow surface (9) with respect to the reference line (41) is downwardly inclined. The angle was set to (9c). Since the oil outflow surface (9) shown in FIGS. 7A and 7B is a flat surface without undulations, the downward inclination angle (9c) is 15 ° regardless of the measurement location.
  • the downward inclination angle (9c) of the oil outflow surface (9) shown in FIGS. 7 (A) and 7 (B) is preferably set to 5 ° to 25 °, and most preferably set to 15 °.
  • the oil outflow hole (10) is vertical during the fully closed period (4a) (4b) of the valve (4) shown in FIGS. 3B and 3C.
  • the oil outflow hole (10) is shown in FIG. 8 during the fully closed period (4a) and (4b) shown in FIGS. 3 (B) and 3 (C) of the valve (4).
  • the engine oil (13) that flows out from the oil outflow hole (10) shown in FIG. 8 to the oil outflow surface (9) overflows toward the input portion (6) side.
  • the engine oil (13) on the oil outflow surface (9) easily flows to the input unit (6) side, and the engine oil (13) is sufficiently supplied to the valve drive unit (3) on the input unit (6) side, so that the valve.
  • the lubricity of the drive unit (3) is improved.
  • the oil outflow surface (9) is directed toward the input portion (6) during the fully closed period (4a) (4b) of the valve (4), as in the modified example 2 shown in FIG. It is oriented in the direction of downward inclination.
  • the oil outflow surface (9) is oriented in the horizontal direction during the fully closed period (4a) (4b) of the valve (4), as in the basic example shown in FIG. May be oriented to.
  • the rocker arm (2) has flowed down from the oil outflow boss portion (8) to the upper surface of the arm portion (5) as in the basic example.
  • the positions are located at both ends of the arm portion (5) in the width direction with the axial length direction of the pivot axis (1) as the width direction.
  • Both widthwise end edges (16b) (16b) of the input portion side guide surface (16) are widened from the input portion (6) toward the oil outflow boss portion (8) side.
  • the engine oil (13) that has flowed down from the oil outflow boss portion (8) to the upper surface of the arm portion (5) is Since it is received by the expanded input unit side guide surface (16) shown in FIG. 9 (A) and guided to the input unit (6) side, the engine is connected to the valve drive unit (3) on the input unit (6) side.
  • the oil (13) is sufficiently supplied, and the lubricity of the valve drive unit (3) is improved.
  • the oil supply path to the oil outflow hole (10) is the shaft center passage (22) provided at the center of the pivot (1) and the shaft center. It is provided with an axial wall hole (24) derived from the passage (22) through the axial peripheral wall (23) of the pivot (1), but the axial peripheral wall hole (24) is only a horizontal pair, and FIG. (B) During the fully closed period (4a) (4b) of the valve (4) shown in (C), the shaft peripheral wall hole (24) and the oil outflow hole (10) do not directly communicate with each other. In the modified example 5 shown in FIG. 10, during the fully closed periods (4a) and (4b) shown in FIGS.
  • the shaft peripheral wall hole (24) and the oil The outflow hole (10) communicates directly. That is, the shaft peripheral wall hole (24) and the oil outflow hole (10) are connected in a row with their central axes aligned, and the outlet of the shaft peripheral wall hole (24) and the oil outflow hole (10) face each other.
  • the shaft peripheral wall hole (24) and the oil outflow hole (10) directly communicate with each other without passing through the fitting gap (1a) between the pivot (1) and the rocker arm (2).
  • the engine oil (13) is introduced from the shaft center passage (22) to the shaft peripheral wall hole (22) during the fully closed period (4a) (4b) of the relatively long valve (4). Since the oil flows out to the oil outflow surface (9) through the oil outflow hole (10) that directly communicates with 24), the engine oil (13) is sufficiently supplied to the input / output units (6) and (7), and the input / output unit is sufficiently supplied. (6) The lubricity of the valve drive unit (3) and the valve (4) on the (7) side is improved.
  • the pivot (1) shown in FIG. 10 includes a pair of horizontal left and right shaft holes and a pair of vertical vertical shaft peripheral wall holes (24), and has a vertical upper shaft peripheral wall hole (24) and an oil outflow hole (10). Communicate directly.
  • the rocker arm (2) is provided with an oil injection hole (25) for injecting engine oil (13) toward the valve drive unit (3).
  • the engine oil (13) is injected from the oil injection hole (25) shown in FIG. 11 toward the valve drive unit (3), so that the engine oil is injected into the valve drive unit (3). (13) is sufficiently supplied, and the lubricity of the valve drive unit (3) is improved.
  • the input portion (6) of the rocker arm (2) is provided with an input bolt (26), and the valve drive portion (3) is a push rod (27).
  • the push rod (27) is provided with a concave curved bolt receiving surface (27a) at the upper end for receiving the protruding bolt lower end (26a) of the input bolt (26), and the bolt receiving surface (27a) is provided.
  • It is provided with an oil reservoir recess (27b) recessed in the inner bottom thereof.
  • the engine oil (13) is collected in the oil storage space (27c) shown in FIG. 12 (B), so that the engine oil (26a) and the bolt receiving surface (27a) are covered with the engine oil (13). 13) is sufficiently supplied, and the lubricity of the lower end portion (26a) of the bolt and the receiving surface (27a) of the bolt is improved.
  • the valve drive unit (3) includes a push rod (27) and a tappet (28), and the tappet (28) is a rod lower end of a convex curved surface of the push rod (27). It is provided with a concave curved rod receiving surface (28a) that receives the portion (27d).
  • the rod receiving surface (28a) is provided with an oil reservoir recess (28b) recessed in the inner bottom thereof.
  • Other structures are the same as the basic example shown in FIG. 13 (A).
  • the rocker arm (2) has an oil guide groove (18) recessed along the longitudinal direction on the upper surface of the arm portion (5) and an oil guide groove.
  • An oil outflow hole (10) opened in the inner bottom surface (19) of (18) is provided.
  • the inner bottom surface (19) of the oil guide groove (18) includes an input unit side inner bottom surface (20) that guides the engine oil (13) that has flowed out from the oil outflow hole (10) to the input unit (6) side, and an output unit. It is provided with an inner bottom surface (21) on the output unit side that guides the (7) side.
  • the downward inclination angle (20a) of the inner bottom surface (20) on the input portion side is shown.
  • the engine oil (13) that has flowed out from the oil outflow holes (10) shown in FIGS. 14 (A) to 14 (C) into the oil guide groove (18) is the oil guide groove (18). Since the oil flows to the input / output units (6) (7) side by the guidance of the above, the engine oil (13) is sufficiently supplied to the valve drive units (3) and the valves (4) on the input / output units (6) (7) sides. , The lubricity of the valve drive unit (3) and the valve (4) is improved.
  • the engine oil (13) that has flowed out from the oil outflow holes (10) shown in FIGS. 14 (A) to 14 (C) into the oil guide groove (18) is the valve (4).
  • the input unit (6) side is passed through the input unit side inner bottom surface (20) having a large downward inclination angle (20a).
  • the engine oil (13) is sufficiently supplied to the valve drive unit (3) on the input unit (6) side, and the lubricity of the valve drive unit (3) is improved.
  • the downward inclination angle (20a) of the inner bottom surface (20) on the input portion side of the modified example 9 shown in FIG. 14 (B) is the downward inclination angle (16) of the input portion side guide surface (16) of the basic example shown in FIG. 1 (C).
  • the angle is the same as (16a)
  • the downward inclination angle (21a) of the inner bottom surface (21) on the output unit side of the modified example 9 shown in FIG. 14 (B) is the output unit side of the basic example shown in FIG. 1 (C). It is the same angle as the downward inclination angle (17a) of the guide surface (17). Similar to the basic example shown in FIG. 1 (C), during the fully closed period (4a) (4b) shown in FIGS.
  • the downward inclination angle (20a) of the inner bottom surface (20) on the side is four times the downward inclination angle (21a) of the inner bottom surface (21) on the output unit side.
  • This value is preferably 2 to 6 times, more preferably 3 to 5 times, and most preferably 4 times. The reason is the same as in the case of the basic example shown in FIG. 1 (C).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un engrenage de soupape qui est destiné à un moteur et dans lequel le pouvoir lubrifiant d'une partie d'entraînement de soupape augmente. Un culbuteur (2) est pourvu : d'une partie bras (5) orientée de manière à se croiser avec un pivot (1); d'une partie d'entrée (6) sur un côté d'extrémité de la partie bras (5); d'une partie de sortie (7) sur l'autre côté d'extrémité de la partie bras (5); et d'une partie bossage (8) pour l'écoulement de l'huile. La partie bossage (8) pour l'écoulement de l'huile est pourvue : d'une surface de sortie d'huile (9) formée sur une surface supérieure; d'un trou de sortie d'huile (10) débouchant dans une zone centrale de la surface de sortie d'huile (9); d'une surface périphérique (8a); et d'un bord de limite (11) formé au niveau de la limite entre la surface de sortie d'huile (9) et la surface périphérique (8a). Le bord de limite (11) est pourvu d'un bord côté partie d'entrée (12) sur le côté partie d'entrée (6) et est conçu de telle sorte que l'huile moteur (13) débordant du trou de sortie d'huile (10) vers la surface de sortie d'huile (9) s'écoule vers le bas à partir du bord côté partie d'entrée (12) de façon à être fournie à une partie d'entraînement de soupape (3) sur le côté partie d'entrée (6).
PCT/JP2020/016418 2019-07-30 2020-04-14 Engrenage de soupape pour moteur WO2021019846A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202080035237.7A CN113811672A (zh) 2019-07-30 2020-04-14 发动机的气门传动装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019140254A JP7232148B2 (ja) 2019-07-30 2019-07-30 エンジンの動弁装置
JP2019-140254 2019-07-30

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WO2021019846A1 true WO2021019846A1 (fr) 2021-02-04

Family

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JP (1) JP7232148B2 (fr)
CN (1) CN113811672A (fr)
WO (1) WO2021019846A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0447114U (fr) * 1990-08-24 1992-04-22
JPH0532701U (ja) * 1991-10-11 1993-04-30 日産デイーゼル工業株式会社 内燃機関のプツシユロツド装置
JP2580163Y2 (ja) * 1993-06-21 1998-09-03 ヤンマーディーゼル株式会社 動弁装置の潤滑構造
JP2001263031A (ja) * 2000-03-22 2001-09-26 Kubota Corp エンジンの動弁潤滑装置
JP2004137999A (ja) * 2002-10-18 2004-05-13 Yanmar Co Ltd 動弁機構の潤滑装置
JP2016191333A (ja) * 2015-03-31 2016-11-10 株式会社クボタ ディーゼルエンジン

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63125115U (fr) * 1987-02-10 1988-08-16

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0447114U (fr) * 1990-08-24 1992-04-22
JPH0532701U (ja) * 1991-10-11 1993-04-30 日産デイーゼル工業株式会社 内燃機関のプツシユロツド装置
JP2580163Y2 (ja) * 1993-06-21 1998-09-03 ヤンマーディーゼル株式会社 動弁装置の潤滑構造
JP2001263031A (ja) * 2000-03-22 2001-09-26 Kubota Corp エンジンの動弁潤滑装置
JP2004137999A (ja) * 2002-10-18 2004-05-13 Yanmar Co Ltd 動弁機構の潤滑装置
JP2016191333A (ja) * 2015-03-31 2016-11-10 株式会社クボタ ディーゼルエンジン

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CN113811672A (zh) 2021-12-17
JP2021021386A (ja) 2021-02-18

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