WO2013037191A1 - 内燃机的齿轮室结构 - Google Patents

内燃机的齿轮室结构 Download PDF

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Publication number
WO2013037191A1
WO2013037191A1 PCT/CN2012/001277 CN2012001277W WO2013037191A1 WO 2013037191 A1 WO2013037191 A1 WO 2013037191A1 CN 2012001277 W CN2012001277 W CN 2012001277W WO 2013037191 A1 WO2013037191 A1 WO 2013037191A1
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WIPO (PCT)
Prior art keywords
gear
internal combustion
combustion engine
chamber structure
gear chamber
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PCT/CN2012/001277
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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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Application filed by 无锡开普动力有限公司 filed Critical 无锡开普动力有限公司
Publication of WO2013037191A1 publication Critical patent/WO2013037191A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/0073—Adaptations for fitting the engine, e.g. front-plates or bell-housings

Definitions

  • the present invention relates to an internal combustion engine, and more particularly to a gear chamber structure of an internal combustion engine, and belongs to the technical field of power plants.
  • the gear chamber structure of an internal combustion engine is well known. Generally, the upper and lower parts are used, and the front and rear parts are separated, and the gear mounting support is bolted between the front and rear covers.
  • the gear chamber of this structure has poor overall rigidity and few output ports, and the water passage and the oil passage are all arranged with a clear tube.
  • the overall structure is complicated, not compact, and cannot meet the requirements of high-power auxiliary output.
  • the present invention is directed to the above-described deficiencies of the prior art, and provides a gear chamber structure of an internal combustion engine which improves the overall rigidity of the gear chamber, increases the number of output ports, and improves the overall structural compactness of the internal combustion engine.
  • a gear chamber structure of an internal combustion engine the gear chamber is composed of an upper cover, a gear bracket and a lower shell fixedly connected from top to bottom, and the gear bracket has a front wall and a rear wall , box structure on the left and right walls.
  • a first idler gear and a second idler gear meshing with the crank gear are disposed between the front wall and the rear wall of the gear bracket, and a plurality of the first and the rear wall of the gear bracket are disposed with the first An idler gear and an output port corresponding to the second idler gear.
  • a camshaft gear meshing with the crank gear is disposed in the upper cover, and the camshaft gear is coupled to the fuel pump gear through a third idler gear.
  • An oil pump that meshes with the first idle gear is mounted in the lower casing, and an oil inlet passage and an oil outlet passage of the oil pump are disposed in the lower casing.
  • a sealing ring is mounted on a joint surface of the lower case and the gear holder.
  • a lubricating oil passage and a first oil passage are disposed in the upper cover, and a second oil passage communicating with the first oil passage is disposed in the gear bracket.
  • a water pump is mounted on the gear bracket, and a water passage communicating with the water pump is disposed in the upper cover, and the water passage is connected to a main water passage of the internal combustion engine through a port.
  • the present invention has the following advantages over the prior art:
  • the present invention consists of an upper cover, a gear bracket and a lower casing group
  • the gear carrier is an integral box structure, which improves the overall rigidity of the gear chamber; the large gear can be arranged in the integral gear bracket, and the output port can be arranged on the outer wall surface of the integral gear bracket, which realizes more internal combustion engines Port, high-power auxiliary output;
  • the upper, middle and lower three-stage split gear chamber structure further improves the rigidity of the gear chamber, improves assembly and manufacturing process, and is easy to maintain; it is embedded in the gear bracket and in the upper cover.
  • Oil passages, waterways, and ports for installing oil passages and waterway accessories significantly improve the compactness of the internal combustion engine structure, improve the sealing reliability between the various components, and also improve the structural strength; the lower shell is sealed as a whole
  • the ring is sealed with the gear bracket and the body at the same time to improve the reliability of the seal, and at the same time, it is convenient and quick to repair and inspect the crankcase and gear chamber of the internal combustion engine.
  • Figure 1 is a front elevational view of the present invention, from the free end of the internal combustion engine.
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1 and a partial view of the free end of the longitudinal section of the internal combustion engine.
  • Figure 3 is a cross-sectional view along line B-B of Figure 2 showing the gear transmission portion.
  • Figure 4 is a cross-sectional view of Figure 1 taken along line C-C.
  • crankshaft 1 to 4 including a crankshaft 1, a main bearing cap 2, a main bearing bolt 3, a body 4, a top plate 5, a bolt 6, a crankcase 7, a gear bracket 8, a front wall 8a, a rear wall 8b, a left wall 8c, a right wall 8d, a first idler gear 9, a large gear 9a, a pinion 9b, a second idler gear 10, a large gear 10a, a pinion 10b, an upper cover 11, a bolt 12, a lower casing 13, a bolt 14, a gear chamber 15, Bolt 16, crankshaft gear 17, hole 18, hole 19, bolt 20, gear shaft 21, bolt 22, bolt 23, output ports 24a, 24b, 24c, 24d, 24e, 24f, 24g, 24h, oil pump 25, oil Oil passage 26a, oil passage 26b, lubricating oil passage 27, ports 27a, 27b, cam gear 28, large gear 28a, pinion 28b, third idle gear 29, fuel pump gear 30, first oil passage 31, The second oil passage 32, the water passage 33, the water
  • the crankshaft 1 of the internal combustion engine is fixed and fixed in the body 4 through the main bearing cap 2 and the main bearing bolt 3.
  • the top of the body 4 has a top plate 5, and the top plate 5 is fixed on the body 4 by bolts 6.
  • the top plate 5 serves to seal the crankcase 7 and also functions as a support member.
  • the gear holder 8 is disposed in front of the body 4, and has an integral front wall 8a, a rear wall 8b, a left wall 8c, and a right wall 8d.
  • An auxiliary output gear may be disposed inside the gear bracket 8; an oil passage and a water passage may be disposed on the wall of the gear bracket 8; an output port may be disposed on an outer wall of the gear bracket 8.
  • Above the gear bracket 8 There is an upper cover 11 which is connected to the gear holder 8 by a plurality of bolts 12. Gears may be arranged inside the upper cover 11; oil passages and water passages may be arranged on the wall of the upper cover 11 of the gear chamber, and various accessories may be installed.
  • a lower casing 13 is mounted below the gear carrier 8, and the lower casing 13 is also connected to the gear carrier 8 by a plurality of bolts 14.
  • the lower casing 13 is used to seal the gear chamber while holding the lubricating oil of the internal combustion engine.
  • the upper and lower sections of the upper cover 11, the gear holder 8 and the lower casing 13 form an integral gear chamber 15, which is further fixed to the body 4 of the internal combustion engine by a plurality of bolts 16.
  • the rear wall 8b of the gear holder 8 abuts against the body 4, and has a hole 18 at a position where the crankshaft 1 and the crank gear 17 protrude, for avoiding the crankshaft 1 and the crank gear 17; the front wall 8a of the gear bracket 8 is extended on the crankshaft 1
  • the position also has a hole 19 for supporting the crankshaft 1 and for outputting the front end of the crankshaft 1.
  • a first idle gear 9 and a second idle gear 10 are mounted in the middle of the front wall 8a and the rear wall 8b of the gear holder 8.
  • the first idle gear 9 is composed of a large gear 9a and a small gear 9b
  • the second idle gear 10 is composed of a large gear 10a and a small gear 10b.
  • the large gear 9a and the pinion %, the large gear 10a and the pinion 10b are respectively connected by a plurality of bolts 20 to form a single body.
  • the middle of the first idle gear 9 and the second idle gear 10 passes through the gear shaft 21, and the first idle gear 9 and the second idle gear 10 rotate on the gear shaft 21, and the gear shaft 21 is passed through.
  • the bolt 22 of the gear shaft 21 is connected to the rear wall 8b and is connected to the rear body 4, and the front end of the gear shaft 21 is provided with a flange cover which is fixed to the front wall 8a of the gear holder 8 by bolts 23.
  • the front wall 8a and the rear wall 8b of the gear holder 8 can be arranged to assist the output or to install the accessories requiring power, and the front wall 8a has the output ports 24a, 24b, 24c of the large gears 10a, 9a. 24d, the output ports 24e, 24f of the pinion gears 10b, 9b; the rear wall 8b also has the output ports 24g, 24h of the large gears 10a, 9a.
  • the output port can be fitted with an output shaft or directly mounted with accessories that require power, such as pumps, oil pumps, etc.
  • an internal combustion engine oil pump 25 is mounted inside the internal combustion engine.
  • the front wall 8a of the gear holder 8 can be provided with an oil passage for guiding the lubricating oil in the lower casing 13 to the upper portion of the internal combustion engine to achieve lubrication of the internal combustion engine and cooling and filtering of the lubricating oil.
  • the oil inlet passage 26a is an oil inlet passage of the oil pump 25, and the oil outlet passage 26b is an outlet of the oil pump 25.
  • the lubricating oil flows along the oil outlet passage 26b into the lubricating oil passage 27 of the upper cover 11 of the gear holder 8.
  • the gear chamber 36 in the upper cover 11 of the gear holder 8 is for covering the cam gear 28, the third idle gear 29, and the fuel pump gear 30 which are extended on the body 4.
  • the upper cover 11 has an outlet connected to the top plate 5 of the body 4, and a fuel pump can be mounted on the top plate 5 of the body 4.
  • the lubricating oil passage 27 of the upper cover 11 has ports 27a and 27b, and can be installed with a lubricating oil cooling and filtering device.
  • the lubricating oil coming out of the frame 8 is filtered, cooled, and output to the main oil passage of the body 4, the second oil passage 32 of the gear holder 8, and other parts requiring lubrication through the first oil passage 31.
  • the water passage 33 in the upper cover 11 can output the water sent by the water pump 34 mounted on the gear holder 8 to the main water passage of the internal combustion engine through the ports 35a and 35b connected to the body 4.
  • the lower end of the gear holder 8 and the gear holder 8 are joined to the gear holder 8 and belong to the gear chamber 15.
  • the rear end and the body 4 are joined to the crankcase 7.
  • a full circle of sealing ring 37 is mounted in the upper joint surface 38 of the lower casing 13 for sealing with the body 4 and the gear carrier 8 at the joint surface 38. In this way, during engine maintenance, the lower casing 13 can be easily removed, and the inside of the body 4 or the gear chamber 15 can be repaired and maintained. At the same time, because of the full circle of seals 37, the reliability of the seal is improved.
  • the piston link 39 moves to drive the crankshaft 1 to rotate, the crank gear 17 rotates to drive the rotation of the first idler gear 9 and the second idler gear 10, and the first idler gear 9 and the large idler gear 9 of the second idler gear 10 10a drives the large gear output ports 24a, 24b, 24c, 24d in the front wall 8a, and the output ports 24e, 24f in the rear wall 8b, including the engine water pump 34, while the large gear 9a of the first idle gear 9 is also driven and mounted.
  • the lubricating oil pump 25 on the rear wall 8b; the pinion gears 9b, 10b of the first idler gear 9 and the second idler gear 10 drive the pinion output ports 24e, 24f in the front wall 8a.
  • the crank gear 17 also drives the cam gear 28, which is composed of a coaxial large gear 28a and a pinion 28b connected by bolts 40.
  • the cam gear 28 rotates
  • the pinion gear 28b simultaneously drives the third idle gear 29 to rotate
  • the third idle gear 29 drives the fuel pump gear 30 to rotate.
  • the lubricating oil flows under the driving of the oil pump 25 in the gear housing lower casing 13, the gear bracket 8, and the upper cover 11, and is output to each portion requiring lubrication; the cooling water is driven by the water pump 34, and passes through the gear chamber.
  • the upper cover 11 transports each of the parts to be cooled.
  • the invention has the following advantages: 1.
  • the gear bracket 8 is composed of a front wall 8a, a rear wall 8b, a left wall 8c and a right wall 8d, and forms an integral box-shaped structure, which can extend out of the body 4 and improve the overall rigidity of the gear chamber 15.
  • the number of auxiliary output ports of the internal combustion engine is increased. Since the rigidity is increased and the capacity of the gear chamber 15 is increased, the first idler gear 9 of the large modulus and the second idle gear 10 can be used for transmission, and the power of the auxiliary output can be increased. 2.
  • the oil passages and water passages embedded in the gear holder 8 and the upper cover 11 and the ports for installing the oil passages and the water passage attachments significantly improve the compactness of the internal combustion engine structure and improve the sealing between the components. Sex, while also increasing the structural strength.
  • the lower casing 13 is sealed with the gear bracket 8 and the body 4 by using the integral sealing ring 37 to improve the reliability of the sealing, and at the same time, it is convenient and quick to repair and inspect the crankcase and the gear chamber of the internal combustion engine.
  • the upper, middle and lower sections of the split gear chamber structure are manufactured, produced and added. The work is also convenient and the process is good.

Abstract

公开了一种内燃机的齿轮室结构，所述齿轮室由从上至下依次固定连接的上盖（11）、齿轮支架（8）及下壳(13）构成，所述齿轮支架为具有前壁（8a）、后壁（8b）、左壁（8c）及右壁（8d）的整体箱型结构，在齿轮支架内可以布置大模数的惰齿轮，在整体齿轮支架的外壁面可以布置输出端口，实现了内燃机多端口、大功率的辅助输出；齿轮支架的整体箱型结构和上中下三段分体式齿轮室结构提高了齿轮室的刚度，该齿轮室结构降低了装配、制造难度，而且维修操作方便。

Description

内燃机的齿轮室结构
技术领域
本发明涉及内燃机， 具体地说是一种内燃机的齿轮室结构， 属于动力装置 技术领域。
背景技术
历来内燃机的齿轮室结构是众所周知的， 一般采用上下整体， 前后分体， 齿轮安装支撑在用螺栓连接在前后盖中间。 这种结构的齿轮室整体刚度差， 输 出端口少， 而且水道、 油道都要采用明管布置， 整体结构复杂， 不紧凑， 也无 法满足大功率辅助输出的要求。
发明内容
本发明针对上述现有技术的不足， 提供一种内燃机的齿轮室结构， 该结构 提高了齿轮室的整体刚度， 另外增加了输出端口的数量， 也改善了内燃机的整 体结构紧凑性。
按照本发明提供的技术方案： 一种内燃机的齿轮室结构， 所述齿轮室由从 上至下依次固定连接的上盖、 齿轮支架及下壳构成， 所述齿轮支架为具有前壁、 后壁、 左壁及右壁的箱型结构。
所述齿轮支架的前壁与后壁之间布置有与曲轴齿轮相啮合的第一惰齿轮及 第二惰齿轮， 所述齿轮支架的前壁及后壁上布置有多个与所述第一惰齿轮及所 述第二惰齿轮相对应的输出端口。
所述上盖内布置有与所述曲轴齿轮相啮合的凸轮轴齿轮， 所述凸轮轴齿轮 通过第三惰齿轮与燃油泵齿轮相连接。
所述下壳内安装有与所述第一惰齿轮相啮合的机油泵， 所述下壳内布置有 所述机油泵的进油油道及出油通道。
所述下壳与所述齿轮支架的接合面安装有密封圈。
所述上盖内布置有润滑油道及第一油道， 所述齿轮支架内布置有与所述第 一油道相通的第二油道。
所述齿轮支架上安装有水泵， 所述上盖内布置有与所述水泵相通的水道， 所述水道通过端口、 与内燃机的主水道相连。
本发明与已有技术相比具有以下优点： 本发明由上盖、 齿轮支架及下壳组 合而成， 齿轮支架为整体箱型结构， 提高了齿轮室的整体刚度； 整体齿轮支架 内可以布置大模数的惰齿轮， 在整体齿轮支架的外壁面可以布置输出端口， 实 现在了内燃机多端口、 大功率的辅助输出； 上中下三段分体式齿轮室结构进一 步提高了齿轮室的刚度， 同时改善装配、 制造工艺性， 而且维修操作方便； 内 嵌于齿轮支架内和上盖内的油道、 水道， 以及安装油道、 水道附件的端口等， 显著提高了内燃机的结构的紧凑性， 提高了各个部件之间的密封可靠性， 同时 也提高了结构强度； 下壳采用整体的密封圈同时与齿轮支架、 机体密封， 提高 密封的可靠性， 同时使维修、 检查内燃机的曲轴箱、 齿轮室变得方便快捷。 附图说明
图 1是本发明的主视图， 内燃机从自由端的向视图。
图 2是图 1沿 A-A的剖视图， 内燃机纵剖的自由端的部分图。
图 3是图 2沿 B-B的剖视图， 显示了齿轮传动部分。
图 4是图 1沿 C-C的旋转剖视图。
具体实施方式
下面结合附图中的实施例对本发明作进一步的说明。
图 1〜图 4中， 包括曲轴 1、 主轴承盖 2、 主轴承螺栓 3、 机体 4、 顶板 5、 螺栓 6、 曲轴箱 7、 齿轮支架 8、 前壁 8a、 后壁 8b、 左壁 8c、 右壁 8d、 第一惰 齿轮 9、 大齿轮 9a、 小齿轮 9b、 第二惰齿轮 10、 大齿轮 10a、 小齿轮 10b、 上盖 11、 螺栓 12、 下壳 13、 螺栓 14、 齿轮室 15、 螺栓 16、 曲轴齿轮 17、 孔 18、 孔 19、 螺栓 20、 齿轮轴 21、 螺栓 22、 螺栓 23、 输出口 24a, 24b, 24c, 24d， 24e， 24f， 24g， 24h、 机油泵 25、 进油油道 26a、 出油通道 26b、 润滑油通道 27、 端 口 27a， 27b, 凸轮轴齿轮 28、 大齿轮 28a、 小齿轮 28b、 第三惰齿轮 29、 燃油 泵齿轮 30、 第一油道 31、 第二油道 32、 水道 33、 水泵 34、 端口 35a， 35b、 齿 轮腔 36、 密封圈 37、 接合面 38、 活塞连杆 39、 螺栓 40等。
如图 1、 图 2所示， 内燃机的曲轴 1通过主轴承盖 2、 主轴承螺栓 3压紧固 定在机体 4内，机体 4的上面有一个顶板 5，顶板 5用螺栓 6固定在机体 4上面， 顶板 5起到了密封曲轴箱 7的作用， 也起到了支承件的作用。
齿轮支架 8设置在机体 4的前面， 它有成一整体的前壁 8a、 后壁 8b、 左壁 8c及右壁 8d。 齿轮支架 8内部可以布置辅助输出齿轮； 齿轮支架 8的壁上可以 布置油道、 水道； 齿轮支架 8的外壁上可以布置输出端口。 该齿轮支架 8上面 有一个上盖 11 , 上盖 11通过多个螺栓 12与齿轮支架 8连接。上盖 11内部可以 布置齿轮； 齿轮室上盖 11的壁上可以布置油道、 水道， 可以安装各种附件。 该 齿轮支架 8的下方安装有一个下壳 13， 下壳 13也通过多个螺栓 14连接到齿轮 支架 8上面。 下壳 13用于密封齿轮室， 同时盛放内燃机润滑油。 上盖 11、 齿轮 支架 8及下壳 13上中下三段形成了整体齿轮室 15， 齿轮室 15再通过多个螺栓 16固定在内燃机的机体 4上面。
齿轮支架 8的后壁 8b紧贴机体 4，在曲轴 1与曲轴齿轮 17伸出的位置有一 孔 18， 用于避开曲轴 1和曲轴齿轮 17; 齿轮支架 8的前壁 8a在曲轴 1伸出的 位置也有一孔 19， 用来支承曲轴 1及供曲轴 1的前端输出。
如图 3所示， 齿轮支架 8的前壁 8a、后壁 8b的中间安装有第一惰齿轮 9和 第二惰齿轮 10。 第一惰齿轮 9由一个大齿轮 9a与一个小齿轮 9b组成， 第二惰 齿轮 10由一个大齿轮 10a与一个小齿轮 10b组成。 大齿轮 9a与小齿轮％、 大 齿轮 10a与小齿轮 10b分别通过多个螺栓 20连接形成一个整体。
如图 4所示， 第一惰齿轮 9和第二惰齿轮 10的中间穿过齿轮轴 21，第一惰 齿轮 9和第二惰齿轮 10就在齿轮轴 21上旋转， 齿轮轴 21被穿过齿轮轴 21的 螺栓 22连接到后壁 8b上再连接到后面的机体 4上面， 齿轮轴 21的前端设置有 法兰盖， 由螺栓 23固定在齿轮支架 8的前壁 8a上。
这样， 齿轮支架 8的前壁 8a和后壁 8b超出机体 4的范围都可以布置辅助 输出或安装需要动力的附件，前壁 8a就有了大齿轮 10a、 9a的输出口 24a、 24b, 24c、 24d, 小齿轮 10b、 9b的输出口 24e、 24f; 后壁 8b上面也有大齿轮 10a、 9a的输出口 24g、 24h。输出端口可以安装输出轴或者直接安装需要动力的附件， 如水泵、油泵等。在后壁 8b的下方， 内燃机的内部还安装有内燃机的机油泵 25。
齿轮支架 8的前壁 8a可以设置油道， 可以将下壳 13中的润滑油引到内燃 机的上方， 实现对内燃机的润滑和对润滑油的冷却、 滤清。 进油油道 26a是机 油泵 25的进油通道， 出油通道 26b是机油泵 25的出口。 润滑油沿着出油通道 26b, 到齿轮支架 8的上盖 11的润滑油通道 27中。
如图 2所示， 齿轮支架 8的上盖 11中的齿轮腔 36用于覆盖机体 4上伸出 的凸轮轴齿轮 28、 第三惰齿轮 29以及燃油泵齿轮 30。 上盖 11有个出口与机体 4的顶板 5相连， 可以在机体 4的顶板 5上安装燃油泵。 如图 3所示， 上盖 11 的润滑油道 27有端口 27a、 27b, 可以安装润滑油的冷却、 滤清装置， 将齿轮支 架 8中过来的润滑油进行滤清、 冷却， 并且通过第一油道 31再输出到机体 4的 主油道、 齿轮支架 8的第二油道 32以及其它需要润滑的部位。 上盖 11中的水 道 33，可以将齿轮支架 8上安装的水泵 34输出送过的水， 经过与机体 4连接的 端口 35a、 35b, 送到内燃机的主水道。
齿轮支架 8的下壳 13前端与齿轮支架 8接合处属于齿轮室 15，后端与机体 4结合处属于曲轴箱 7。 下壳 13的上方接合面 38内安装有一整圈的密封圈 37, 用于实现与机体 4、齿轮支架 8在接合面 38的同时密封。这样在发动机维护时， 可以很方便的拆除下壳 13， 对机体 4内或者齿轮室 15的修理、维护。 同时也因 为有整圈的密封圈 37提高了密封的可靠性。
当内燃机工作时， 活塞连杆 39运动驱动曲轴 1旋转， 曲轴齿轮 17旋转， 带动第一惰齿轮 9和第二惰齿轮 10的旋转， 第一惰齿轮 9和第二惰齿轮 10的 大齿轮 9a、 10a驱动前壁 8a中的大齿轮输出口 24a、 24b、 24c、 24d, 和后壁 8b 中的输出口 24e、 24f, 包括发动机水泵 34， 同时第一惰齿轮 9的大齿轮 9a也驱 动安装在后壁 8b上的润滑油泵 25;第一惰齿轮 9和第二惰齿轮 10的小齿轮 9b、 10b驱动前壁 8a中的小齿轮输出端口 24e、 24f。 在齿轮支架 8的上口， 曲轴齿 轮 17同时也驱动凸轮轴齿轮 28， 凸轮轴齿轮 28由同轴的大齿轮 28a、 小齿轮 28b, 通过螺栓 40连接组成。 当凸轮轴齿轮 28转动时， 小齿轮 28b同时驱动第 三惰齿轮 29旋转， 第三惰齿轮 29带动燃油泵齿轮 30旋转。 在内燃机工作中， 润滑油在机油泵 25的驱动下在齿轮室下壳 13、 齿轮支架 8、 上盖 11中流动起 来， 输出到各个需要润滑的部位； 冷却水被水泵 34 驱动， 经过齿轮室上盖 11 输送个各个需要冷却的部位。
本发明具有以下优点： 1、 齿轮支架 8由前壁 8a、 后壁 8b、 左壁 8c及右壁 8d组成一个整体箱型结构， 可伸出机体 4范围， 提高了齿轮室 15的整体刚度， 增加了内燃机辅助输出端口的数量。 由于刚度提高， 增大了齿轮室 15的容量， 可以采用大模数的第一惰齿轮 9， 第二惰齿轮 10来传动， 可以增大辅助输出的 功率。 2、 内嵌于齿轮支架 8内和上盖 11 内的油道、 水道， 以及安装油道、 水 道附件的端口等， 显著提高了内燃机的结构的紧凑性， 提高了各个部件之间的 密封可靠性， 同时也提高了结构强度。 3、 下壳 13采用整体的密封圈 37同时与 齿轮支架 8、 机体 4密封， 提高密封的可靠性， 同时使维修、 检査内燃机的曲轴 箱、 齿轮室变得方便快捷。 4、 上中下三段分体式齿轮室结构在制造、 生产、 加 工中也比较方便， 工艺性好。
本实现新型也不限于上述实施例， 可以在权利要求范围内进行各种变更， 来实现相同的功能。

Claims

权 利 要 求 书
1. 一种内燃机的齿轮室结构， 其特征是： 所述齿轮室 （15 ) 由从上至下依 次固定连接的上盖（11 )、 齿轮支架（8)及下壳（13 )构成， 所述齿轮支架（8) 为具有前壁 （8a)、 后壁 （8b)、 左壁 （8c) 及右壁 （8d) 的箱型结构。
2. 按照权利要求 1所述的内燃机的齿轮室结构， 其特征是： 所述齿轮支架 ( 8) 的前壁 （8a) 与后壁 （8b) 之间布置有与曲轴齿轮 （17) 相啮合的第一惰 齿轮 （9) 及第二惰齿轮 （10)， 所述齿轮支架 （8) 的前壁 （8a) 及后壁 （8b) 上布置有多个与所述第一惰齿轮 （9) 及所述第二惰齿轮（10) 相对应的输出端 □。
3. 按照权利要求 2所述的内燃机的齿轮室结构， 其特征是： 所述上盖（11 ) 内布置有与所述曲轴齿轮（ 17)相啮合的凸轮轴齿轮（28)，所述凸轮轴齿轮（28) 通过第三惰齿轮 （29) 与燃油泵齿轮 （30) 相连接。
4. 按照权利要求 2所述的内燃机的齿轮室结构， 其特征是： 所述齿轮支架 ( 8) 下部安装有与所述第一惰齿轮 （9)相啮合的机油泵 （25 )， 所述齿轮支架 ( 8) 下部布置有所述机油泵 （25 ) 的进油油道 （26a) 及出油通道 （26b)。
5. 按照权利要求 1所述的内燃机的齿轮室结构， 其特征是： 所述下壳（13 ) 与所述齿轮支架 （8) 的接合面 （38) 安装有密封圈 （37)。
6. 按照权利要求 1所述的内燃机的齿轮室结构， 其特征是： 所述上盖（11 ) 内布置有润滑油道 （27) 及第一油道 （31 )， 所述齿轮支架 （8 ) 内布置有与所 述第一油道 （31 ) 相通的第二油道 （32)。
7. 按照权利要求 1所述的内燃机的齿轮室结构， 其特征是： 所述齿轮支架 ( 8) 上安装有水泵 （34), 所述上盖 （11 ) 内布置有与所述水泵 （34) 相通的 水道 （33 )， 所述水道 （33 ) 通过端口 G5a、 35b) 与内燃机的主水道相连。
PCT/CN2012/001277 2011-09-13 2012-09-18 内燃机的齿轮室结构 WO2013037191A1 (zh)

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