WO2012051794A1 - —种柴油机凸轮轴的安装与润滑结构 - Google Patents

—种柴油机凸轮轴的安装与润滑结构 Download PDF

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Publication number
WO2012051794A1
WO2012051794A1 PCT/CN2011/001584 CN2011001584W WO2012051794A1 WO 2012051794 A1 WO2012051794 A1 WO 2012051794A1 CN 2011001584 W CN2011001584 W CN 2011001584W WO 2012051794 A1 WO2012051794 A1 WO 2012051794A1
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Prior art keywords
camshaft
lubricating oil
cylinder head
support hole
cover
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PCT/CN2011/001584
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English (en)
French (fr)
Inventor
肖亨琳
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无锡开普动力有限公司
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Publication of WO2012051794A1 publication Critical patent/WO2012051794A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/06Dip or splash lubrication
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/14Tappets; Push rods
    • F01L1/146Push-rods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10Lubrication of valve gear or auxiliaries
    • F01M9/102Lubrication of valve gear or auxiliaries of camshaft bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L2001/0476Camshaft bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L2001/054Camshafts in cylinder block
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2250/00Camshaft drives characterised by their transmission means
    • F01L2250/06Camshaft drives characterised by their transmission means the camshaft being driven by gear wheels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00Arrangements solving specific problems in relation with valve gears
    • F01L2810/02Lubrication

Definitions

  • the present invention relates to a mounting and lubricating structure for a camshaft of a diesel engine, and belongs to the technical field of engines. Background technique
  • a bearing support mounting structure is provided on a structure for supporting a camshaft formed between a body of the engine and a crankcase, and in order to convey lubricating oil to the camshaft supporting journal and the bearing portion, usually by setting the inside
  • the oil passage or piping connects the shaft groove and the fuel injection port of the oil pump, and the high-pressure lubricating oil is sent from the oil pump to the shaft groove to form a lubricating structure between the shaft and the bearing portion.
  • the oil path is complicated, and some oil is also used. The mist is lubricated, but it is easy to cause a problem of insufficient lubricating oil in the bearing portion. Summary of the invention
  • the object of the present invention is to overcome the above-mentioned deficiencies, thereby providing a diesel engine camshaft mounting and lubricating structure, which is based on a conventional diesel engine, which simplifies the support structure of the ends of the conventional diesel engine camshaft, and
  • the utility model is characterized in that a reasonable oil inlet structure and a subtle atomized lubricating oil are arranged in the supporting structure portion of the camshaft of the diesel engine, the oil supply structure is simple, the cost is low, and the camshaft device capable of effectively supplying the oil to the camshaft supporting the journal is provided.
  • the diesel engine camshaft support can be well lubricated.
  • a diesel engine camshaft mounting and lubricating structure includes a machine body, a crankcase cover, a camshaft, a cylinder block, a camshaft gear, a cylinder head cover, and a cylinder head, and the engine body
  • a cylinder block is mounted on the upper portion
  • a cylinder head is mounted on the upper portion of the cylinder block
  • a cylinder head cover is mounted on the cylinder head.
  • the camshaft gear is mounted on the camshaft, and the shaft is supported on the engine body at both ends of the camshaft.
  • a lubricating oil filler port is opened above the cylinder head cover.
  • a lubricating oil inlet passage is disposed in the cylinder head.
  • a lubricating oil inlet passage and an oil storage chamber are disposed above the inside of the body.
  • the lubricating oil filling port of the cylinder head cover is in communication with the lubricating oil inlet passage of the cylinder head; the lubricating oil inlet passage of the cylinder head is connected to the lubricating oil inlet passage of the body through the push rod sleeve .
  • a lubricating oil groove is formed on an inner circular surface of the body camshaft support hole that is in contact with the camshaft journal.
  • the lubricating oil groove on the inner circular surface of the body camshaft supporting hole and the camshaft journal is in communication with the lubricating oil passage formed on the bottom surface of the bottom surface of the body camshaft supporting hole to realize the camshaft body side camshaft Lubrication of the neck.
  • a lubricating oil groove is formed on an inner circular surface of the crankcase cover camshaft support hole in contact with the camshaft journal, and a lubricating oil passage along the circumference is formed on the camshaft end surface and the bottom surface of the crankcase cover camshaft support hole
  • the lubricating oil groove on the inner circular surface of the crankcase cover camshaft support hole and the camshaft journal is in communication with the lubricating oil passage formed on the bottom surface of the crankcase cover support hole to realize the camshaft crankcase cover. Lubrication of the side camshaft 3 ⁇ 43 ⁇ 4.
  • crankcase cover camshaft support hole Above the crankcase cover camshaft support hole, a fan-shaped oil storage chamber formed by a rib of a crankcase cover is disposed.
  • the present invention has the following advantages over the prior art:
  • the present invention can not only satisfy the installation of the camshaft by changing the support structure at both ends of the camshaft of the existing diesel engine from the original bearing support structure to the support bearing at both ends, and adopting the direct support of the camshaft journal. ⁇ ⁇ ] 'And Jane The installation structure of the camshaft is realized, and the cost of the whole engine is saved.
  • the lubricating oil in the cylinder head of the diesel engine of the present invention flows into the oil storage chamber of the body through the hole of the push rod sleeve, and finally flows to the journal shaft of the cam shaft, because the cam shaft performs high-speed rotary motion,
  • the lubricating oil is quickly atomized, so that the crankcase is quickly filled with oil mist, so that the lubricating oil of the engine oil mist lubrication part such as the support shaft of the wheel and the lubricating part of the rocker arm can be quickly replenished, so that the lubrication of the lubricating oil supply is not slow.
  • the components are stuck or worn, making the engine run more powerful and sinful.
  • the firewood engine of the present invention solves the lubrication of the support journals at both ends of the camshaft, so that the support journals at both ends of the engine do not need to use a dedicated oil pump lubricating oil passage in the crankcase. To achieve lubrication of the camshaft journal.
  • FIG. 1 is a front cross-sectional view of the present invention.
  • FIG. 2 is a schematic view of the oil storage chamber of the living body of the present invention.
  • FIG 3 is a schematic view of a lubricating oil groove of a camshaft support hole of a body according to the present invention.
  • FIG. 4 is a schematic view of a lubricating oil groove and an oil storage chamber of a crankshaft cover camshaft support hole of the present invention.
  • FIG. 5 is a schematic view showing the installation of a camshaft according to the present invention. detailed description
  • the present invention is mainly composed of a body 1 (body camshaft support hole la, lubricating oil tank lb, lubricating oil passage) Lc, lubricating oil inlet passage Id, oil storage chamber le, tappet hole If), crankcase cover 2 (crankcase cover support hole 2a, lubricating oil groove 2b, lubricating oil passage 2c, fan-shaped oil storage chamber 2d), cam Shaft 3 (both journals 3a, 3b, valve cam 3c), cylinder block 4, camshaft gear 5, cylinder head cover 6 (cylinder head cover filler port 6a), cylinder head 7 (lubricating oil inlet passage 7a)
  • the push rod sleeve 8, the valve push rod 9 and the valve tappet 10 are formed.
  • the upper portion of the engine body 1 of the present invention is mounted with a cylinder block 4, and a cylinder head 7 is mounted on the upper portion of the cylinder block 4, and a cylinder head cover 6 is mounted on the cylinder head 7, and the valve tappet 10 is mounted on the body tappet hole
  • the inner portion and the lower portion are fitted to the air distribution cam 3c on the cam shaft 3, and the upper portion is connected to the valve push rod 9 located in the push rod sleeve 8, and the cam shaft gear 5 is mounted on the cam shaft 3, the cam
  • the journals 3a, 3b at both ends of the shaft 3 are directly supported in the body camshaft support hole la and the crankcase cover support hole 2a corresponding to the engine body 1 and the crankcase cover 2, and the conventional bearing support structure is eliminated; 6 defines the upper oil filler. 6A; in the cylinder head 7 is provided with a lubricating oil feed passage. 7A; within the body 1 is provided with a lubricating oil above the oil feed passage and the oil reservoir chamber body le.
  • the cylinder head cover lubricating oil filler port 6a is in communication with the cylinder head lubricating oil inlet passage 7a.
  • the cylinder head lubricating oil inlet passage 7a and the body lubricating oil inlet passage are communicated through the push rod sleeve 8; the lubricating oil added from the cylinder head filler port 6a and the lubricating oil in the cylinder head 7 pass through the cylinder head lubricating oil.
  • the body camshaft support hole la is opened on the inner circumferential surface of the camshaft journal 3a.
  • the groove lb forms a lubricating oil passage lc along the circumference of the end surface of the cam shaft 3 and the bottom surface of the body cam shaft support hole la, and the lubricating oil groove lb on the inner circular surface of the body cam shaft supporting hole la contacting the cam shaft journal 3a is
  • the end surface of the camshaft 3 communicates with the lubricating oil passage lc formed along the circumference of the bottom surface of the support shaft la of the body camshaft to realize lubrication of the camshaft neck 3a of the camshaft 3.
  • crankcase cover camshaft support hole 2a and the camshaft journal 3b are in contact with the inner circular surface to define a lubricating oil groove 2b, and the end surface of the camshaft 3 and the crankcase cover supporting hole 2a form a circumferential surface.
  • the oil passages 2c communicate with each other to achieve lubrication of the camshaft 3 crankcase cover side cam journals 3b.
  • crankcase cover camshaft support hole 2a Above the crankcase cover camshaft support hole 2a, a sector-shaped oil storage chamber 2d formed by a rib plate projecting from the crankcase cover is disposed.
  • the lubricating oil added from the cylinder head cover filler port 6a passes through the lubricating oil inlet passage 7a, enters the push rod sleeve hole 8, and finally passes through the lubricating oil inlet passage Id to enter the body oil storage chamber.
  • the oil in the oil storage chamber le of the body flows to the journal shaft of the camshaft 3. Due to the high-speed rotation of the engine, the lubricating oil flowing out of the oil storage chamber le of the body is rapidly atomized by the rotation speed, and is filled with the crankcase.
  • the lubricating oil mist in the body passes through the lubricating oil groove lb in the support shaft hole la of the body, and enters the lubricating oil of the end surface of the cam shaft 3 and the bottom surface of the support shaft la of the body camshaft.
  • the lc, the camshaft support journal 3a is sufficiently lubricated by the gap between the camshaft support journal 3a and the inner surface of the body camshaft support hole la, and the camshaft support journal 3a and the body camshaft support hole la are reduced. abrasion.
  • the lubricating oil in the crankcase is quickly introduced into the fan-shaped oil storage chamber 2d formed by the raised ribs on the crankcase cover 2 along with the rotation of the camshaft gear 5, and finally passes through the crankcase.
  • the lubricating oil groove 2b in the cover camshaft support hole 2a enters the lubricating oil passage 2c formed on the bottom surface of the cam shaft 3 and the bottom surface of the crankcase cover supporting hole 2a, and passes through the cam shaft supporting journal 3b and the crankcase cam shaft supporting hole 2a.
  • the gap between the inner surfaces allows the camshaft support journal 3b to be sufficiently lubricated, reducing wear of the camshaft support journal 3b and the crankcase camshaft support hole 2a.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

一种柴油机凸轮轴的安装与润滑结构 技术领域
[0001 ] 本发明涉及一种柴油机凸轮轴的安装与润滑结构,属于发动机技术领域。 背景技术
[0002] 在传统技术中,在发动机的机体和曲轴箱之间形成的支撑凸轮轴的结构上设置了 轴承支撑安装结构,为了向凸轮轴支撑轴颈及轴承部输送润滑油,通常通过设置内部油道 或者配管等形式连通轴槽和机油泵的喷油口,从机油泵向轴槽里输送高压润滑油,形成轴 和轴承部之间的润滑结构,油路显得复杂,部分也釆用油雾润滑,但容易产生轴承部润滑油 不足的问题。 发明内容
[0003] 本发明的目的在于克服上述不足之处,从而提供一种柴油机凸轮轴的安装与润滑 结构,该结构是在传统柴油发动机的基础上,简化传统柴油发动机凸轮轴两端的支撑结构, 并在柴油发动机凸轮轴的支撑结构部设置合理的进油结构及巧妙的雾化润滑油的结构,其 供油结构简单、成本低廉,且可有效地向凸轮轴支撑轴颈供油的凸轮轴装置,使柴油发动机 凸轮轴支撑部能得到良好的润滑效果。
[0004] 按照本发明提供的技术方案,一种柴油机凸轮轴的安装与润滑结构包括机体、曲 轴箱盖、凸轮轴、气缸体、凸轮轴齿轮、气缸盖罩、气缸盖,所述的发动机机体的上部安装有 气缸体,气缸体上部安装有气缸盖,气缸盖上安装有气缸盖罩,所述凸轮轴齿轮安装在凸轮 轴上,特征是:所述凸轮轴两端轴颈支撑在发动机机体和曲轴箱盖相对应的机体凸轮轴支 撑孔和曲轴箱盖凸轮轴支撑孔内。所述气缸盖罩上方开设有润滑油加油口。所述气缸盖内 设置有润滑油进油通道。 所述机体内部上方设置有润滑油进油通道及储油室。
[0005] 所述气缸盖罩的润滑油加油口与气缸盖的润滑油进油通道相连通;气缸盖的润滑 油进油通道与机体的润滑油进油通道之间通过推杆套管相连通。
[0006] 所述机体凸轮轴支撑孔与凸轮轴轴颈相接触的内圆表面上开设了润滑油槽。所述 机体凸轮轴支撑孔与凸轮轴轴颈相接触的内圆表面上的润滑油槽与凸轮轴端面与机体凸 轮轴支撑孔底面沿周形成的润滑油油道相通,实现凸轮轴机体侧凸轮轴颈的润滑。
[0007] 所述曲轴箱盖凸轮轴支撑孔与凸轮轴轴颈相接触的内圆表面上开设了润滑油槽, 在凸轮轴端面与曲轴箱盖凸轮轴支撑孔底面形成沿周的润滑油油道,曲轴箱盖凸轮轴支撑 孔与凸轮轴轴颈相接触的内圆表面上的润滑油槽与凸轮轴端面与曲轴箱盖支撑孔底面沿 周形成的润滑油油道相通,实现凸轮轴曲轴箱盖侧凸轮轴 ¾¾的润滑。
[0008] 所述的曲轴箱盖凸轮轴支撑孔上方设置有由曲轴箱盖突起的筋扳形成的扇形储 油室。
[0009] 本发明与已有技术相比具有以下优点:
( 1 )、本发明通过将现有柴油发动机凸轮轴两端的支撑结构由原来的轴承支撑结构改 为取消两端支撑轴承,采用凸轮轴轴颈直接支撑的方式,不但能满足凸轮轴的安装,ιίι] '且简 化了凸轮轴的安装结构,同时节约了发动机整机成本。
[0010] ( 2)、本发明所述的柴油发动机气缸盖内的润滑油通过推杆套管孔流入机体储油 室,最后流到凸轮轴轴颈上,由于凸轮轴做高速旋转运动,使润滑油迅速雾化,使曲轴箱内 很快充满油雾,使发动机油雾润滑部位如 ιΎ轮轴支撑轴颈、摇臂润滑部位的润滑油迅速得 到补充,不至于应润滑油供应缓慢而使润滑构件卡死或磨损,使发动机运转更力 11 Ψ稳、可 罪。
[001 1 ] ( 3)、本发明所述的柴汕发动机解决了凸轮轴两端支撑轴颈的润滑,使发动机两端 支撑轴颈在曲轴箱内无需使用专用的机油泵润滑油道就 nj以实现凸轮轴轴颈的润滑。
[0012] ( 4 )本发明所述的曲轴箱盖凸轮轴支撑孔上方设置有曲轴箱盖筋板形成的扇形储 油室,加大了曲轴箱盖侧凸轮轴支撑孔内润滑油的储油量,使曲轴箱盖侧 Λ轮轴支撑轴颈 润滑更加充分。 附图说明
[0013] 图 1为本发明的正面剖视图。
[0014] 图 2为本发明的机体储油室示意图。
[0015] 图 3为本发明的机体凸轮轴支撑孔润滑油槽示意图。
[0016] 图 4为本发明曲轴箱盖凸轮轴支撑孔润滑油槽及储油室示意图。
[0017] 图 5为本发明凸轮轴安装示意图。 具体实施方式
[0018] 下面本发明将结合附图中的实施例作进一歩描述 - 如图 1〜图 5所示,本发明主要由机体 1 (机体凸轮轴支撑孔 la、润滑油槽 lb、润滑油 油道 lc、润滑油进油通道 Id、储油室 le、挺柱孔 If )、曲轴箱盖 2 (曲轴箱盖支撑孔 2a、润滑 油槽 2b、润滑油油道 2c、扇形储油室 2d )、凸轮轴 3 (两端轴颈 3a、3b、配气凸轮 3c )、气缸体 4、凸轮轴齿轮 5、气缸盖罩 6 (气缸盖罩加油口 6a)、气缸盖 7 (润滑油进油通道 7a)、推杆套 管 8、气门推杆 9及气门挺柱 10等零件构成。
[0019] 本发明发动机机体 1的上部安装有气缸体 4,气缸体 4上部安装有气缸盖 7,气缸 盖 7上安装有气缸盖罩 6,所述气门挺柱 10安装在机体挺柱孔 If 内,下部与凸轮轴 3上的 配气凸轮 3c相贴合,上部与位于推杆套管 8内的气门推杆 9连接,所述凸轮轴齿轮 5安装 在凸轮轴 3上,所述的凸轮轴 3两端轴颈 3a、3b直接支撑在发动机机体 1和曲轴箱盖 2相 对应的机体凸轮轴支撑孔 la和曲轴箱盖支撑孔 2a内,取消了传统的轴承支撑结构;在气缸 盖罩 6上方开设有润滑油加油口 6a;在气缸盖 7内设置有润滑油进油通道 7a ;在机体 1内 部上方设置有润滑油进油通道 及机体储油室 le。
[0020] 所述的气缸盖罩润滑油加油口 6a与气缸盖润滑油进油通道 7a相连通。气缸盖润 滑油进油通道 7a与机体润滑油进油通道 之间通过推杆套管 8相连通;从气缸 罩加油 口 6a加入的润滑油及气缸盖 7内的润滑油途经气缸盖润滑油进油通道 7a、推杆套管 8,最 后进入机体润滑油进油通道 Id进入机体上方的机体储油审 le,机体储油室 le内的润滑油 最后流入到凸轮轴 3的轴颈上,随凸轮轴 3的旋转运动在曲轴箱内产生飞溅的油雾。
[0021 ] 所述的机体凸轮轴支撑孔 la与凸轮轴轴颈 3a相接触的内圆表面上开设了润滑油 槽 lb,在凸轮轴 3端面与机体凸轮轴支撑孔 la底面形成沿周的润滑油油道 lc,机体凸轮轴 支撑孔 la与凸轮轴轴颈 3a相接触的内圆表面上的润滑油槽 l b与凸轮轴 3端面与机体凸 轮轴支撑孔 la底面沿周形成的润滑油油道 lc相通,实现凸轮轴 3机休侧凸轮轴颈 3a的润 滑。
[0022] 所述的曲轴箱盖凸轮轴支撑孔 2a与凸轮轴轴颈 3b相接触的内圆表面上开设了润 滑油槽 2b,在凸轮轴 3端面与曲轴箱盖支撑孔 2a底面形成沿周的润滑油油道 2c,曲轴箱盖 凸轮轴支撑孔 2a与凸轮轴轴颈 3b相接触的内圆表面上的润滑油槽 2b与凸轮轴 3端面与 曲轴箱盖支撑孔 2a底面沿周形成的润滑油油道 2c相通,实现凸轮轴 3曲轴箱盖侧凸轮轴 颈 3b的润滑。
[0023] 所述的曲轴箱盖凸轮轴支撑孔 2a上方设置有由曲轴箱盖凸起的筋板形成的扇形 储油室 2d。
[0024] 如图 1所示,从气缸盖罩加油口 6a加入的润滑油途经润滑油进油通道 7a,进入推 杆套管孔 8,最后途经润滑油进油通道 Id进入机体储油室 le,发动机运转后,机体储油室 le 内的机油流到凸轮轴 3轴颈上,由于发动机的高速旋转,使机体储油室 le流出的润滑油在 转速的作用下迅速雾化,充满曲轴箱,加速了润滑油的再次循环,使油雾润滑构件凸轮轴 3 的润滑油迅速得到补充,不至于由于润滑油供应缓慢而导致凸轮轴两端的轴颈 3a、3b磨损 严重甚至卡死。
[0025] 如图 3、图 5所示,机体内的润滑油雾途经机体凸轮轴支撑孔 la内的润滑油槽 lb 进入凸轮轴 3端面与机体凸轮轴支撑孔 la底面沿周形成的润滑油油道 lc,透过凸轮轴支撑 轴颈 3a与机体凸轮轴支撑孔 la内表面间的间隙使凸轮轴支撑轴颈 3a得到充分润滑,降低 了凸轮轴支撑轴颈 3a与机体凸轮轴支撑孔 la的磨损。
[0026] 如图 4、图 5所示,曲轴箱内的润滑油随凸轮轴齿轮 5的旋转被快速引入曲轴箱盖 2上凸起筋板形成的扇形储油室 2d内,最后途经曲轴箱盖凸轮轴支撑孔 2a内的润滑油槽 2b进入凸轮轴 3端面与曲轴箱盖支撑孔 2a底面沿周形成的润滑油油道 2c,透过凸轮轴支 撑轴颈 3b与曲轴箱凸轮轴支撑孔 2a内表面间的间隙使凸轮轴支撑轴颈 3b得到充分润滑, 降低了凸轮轴支撑轴颈 3b与曲轴箱凸轮轴支撑孔 2a的磨损。

Claims

权 利 要 求
1. ― -种柴油机凸轮轴的安装与润滑结构,包括机体(1 )、曲轴箱盖(2)、凸轮轴(3)、气 缸体(4)、凸轮轴齿轮(5)、气缸盖罩(6)、气缸盖(7),在所述的发动机机体(1)上部安装气 缸体(4),气缸体(4)上部安装有气缸盖(7),气缸盖(7)上安装有气缸盖罩(6),所述凸轮轴 齿轮(5)安装在凸轮轴(3)上,其特征是:所述凸轮轴(3)两端的凸轮轴轴颈(3a、3b)分别 支撑在发动机机体( 1 )和曲轴箱盖(2)相对应的机体凸轮轴支撑孔( la)和曲轴箱盖凸轮轴 支撑孔(2a)内;所述气缸盖罩(6)上方开设有润滑油加油口(6a);所述气缸盖(7)内设置 有润滑油进油通道( 7a);所述机体( 1 )内部上方设置有润滑油进油通道( Id)及机体储油室 (le);所述气缸盖罩(6)的润滑油加油口(6a)与气缸盖(7)的润滑油进油通道(7a)相连 通;气缸盖(7)的润滑油进油通道(7a)与机体( 1 )的润滑油进油通道( Id)之间通过推杆套 管(8)相连通。
2. 根据权利要求 1所述的一种柴油机凸轮轴的安装与润滑结构,其特征在于所述的机 体凸轮轴支撑孔(la)与凸轮轴轴颈(3a)相接触的内圆表面上开设有润滑油槽(lb)。
3.根据权利要求 1所述的一种柴油机凸轮轴的安装与润滑结构,其特征在于所述的在 凸轮轴(3)端面与机体凸轮轴支撑孔(la)底面形成沿周的润滑油油道(lc),机体凸轮轴支 撑孔(la)与凸轮轴轴颈(3a)相接触的内圆表面上的润滑油槽与凸轮轴端面与机体凸轮轴 支撑孔(la)底面沿周形成的润滑油进油通道(lc)相通。
4.根据权利要求 1所述的一种柴油机凸轮轴的安装与润滑结构,其特征在于所述的曲 轴箱盖凸轮轴支撑孔(2a)与凸轮轴轴颈(3a)相接触的内圆表面上开设有润滑油槽(2b)。
5.根据权利要求 1所述的一种柴油机凸轮轴的安装与润滑结构,其特征在于所述的凸 轮轴(3)端面与曲轴箱盖(2)凸轮轴支撑孔(2a)底面形成沿周的润滑油油道(2c),曲轴箱 盖凸轮轴支撑孔(2a)与凸轮轴轴颈相接触的内圆表面上的润滑油槽与凸轮轴端面与曲轴 箱盖支撑孔(2a)底面沿周形成的润滑油油道(2c)相通。
6. 根据权利要求 1所述的一种柴油机凸轮轴的安装与润滑结构,其特征在于所述的曲 轴箱盖凸轮轴支撑孔(2a)上方设置有由曲轴箱盖突起的筋板形成的扇形储油室(2d)。
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