CN2235025Y - 二冲程发动机曲轴箱 - Google Patents

二冲程发动机曲轴箱 Download PDF

Info

Publication number
CN2235025Y
CN2235025Y CN95240790U CN95240790U CN2235025Y CN 2235025 Y CN2235025 Y CN 2235025Y CN 95240790 U CN95240790 U CN 95240790U CN 95240790 U CN95240790 U CN 95240790U CN 2235025 Y CN2235025 Y CN 2235025Y
Authority
CN
China
Prior art keywords
crank shaft
crankcase
utility
model
cycle engine
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CN95240790U
Other languages
English (en)
Inventor
周敏峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN95240790U priority Critical patent/CN2235025Y/zh
Application granted granted Critical
Publication of CN2235025Y publication Critical patent/CN2235025Y/zh
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Landscapes

  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

一种二冲程发动机曲轴箱，它是由曲轴箱箱体1、曲轴6以及安装在曲轴6上的轴承2等组成，油封3安装在曲轴6的曲柄4内，油封3的唇口5封在曲轴箱1上。本实用新型具有运转噪声低、使用寿命长且能保证发动机起动性能好、排气污染少、体积小等优点。

Description

二冲程发动机曲轴箱
本实用新型是对二冲程发动机曲轴箱的改进。
现有的二冲程发动机曲轴箱，一般是由曲轴箱箱体、曲轴、曲轴轴承等组成，在曲轴轴承的左、右二端各安装有一个油封。这种结构的曲轴箱，一方面，由于曲轴轴承的润滑是由机油泵排入曲轴箱内的微量润滑油来润滑的，使得曲轴轴承因缺少润滑而被磨损，导致其径向和轴向的间隙增大，产生很大的运转噪声，且使用寿命短；另一方面，由于油封装在曲轴轴承的左、右二端，使发动机的横向宽度大，体积相对而言就较大。
本实用新型的目的是要提供一种运转噪声低、使用寿命长且能保证发动机起动性能好、排气污染少、体积小的二冲程发动机曲轴箱。
本实用新型的目的是这样来实现的，一种二冲程发动机曲轴箱，它是由曲轴箱箱体1、曲轴6以及安装在曲轴6上的轴承2等组成，油封3安装在曲轴6的曲柄4内，油封3的唇口5封在曲轴箱1上。
本实用新型由于将油封3从曲轴轴承2的外端移到曲轴箱箱体内，使曲轴轴承2的润滑直接由机油箱里齿轮在旋转时飞浅出来的机油来润滑，这种润滑方法，一方面，既可减少机油泵的油量，使可燃混合气中机油成分减少，从而使发动机燃烧室内的积炭明显减少，改善了发动机气缸的润滑，避免了活塞环被拉伤、卡死、火花塞因连炭而断火、零件过热等不良现象的发生，使发动机的起动性能明显提高，故障发生率下降，排气污染减少；另一方面，由于曲轴轴承得到了充分润滑，减轻了运转噪声，提高了使用寿命；再次，采用这种结构后，可缩短发动机的横向宽度，使发动机的体积也随之缩小。
下面结合附图对本实用新型作进一步的叙述。
附图为本实用新型的结构简图。
本实用新型的油封3安装在曲轴箱曲轴6的曲柄4内，其内侧的唇口5与曲轴箱箱体1呈密封配合，当曲轴6旋转时，油封3跟着曲轴6一起旋转。油封3的作用是防止机油箱内的机油进入曲轴箱内而造成混合气中机油成分明显增加，导致燃烧室产生大量积炭，污染了火花塞，使电极因连炭而断火，发动机不能运转。本实用新型在工作时，当发动机的活塞由上止点向下止点运动时，使曲轴箱内产生压力，把曲轴箱内的混合气经气缸扫气道排入气缸进行扫气，把上一次做功冲程时产生的废气扫清，从而进行第二次做功冲程。

Claims (1)

1、一种二冲程发动机曲轴箱，它是由曲轴箱箱体(1)、曲轴(6)以及安装在曲轴(6)上的轴承(2)等组成，其特征在于油封(3)安装在曲轴(6)的曲柄(4)内，油封(3)的唇口(5)封在曲轴箱(1)上。
CN95240790U 1995-10-31 1995-10-31 二冲程发动机曲轴箱 Expired - Fee Related CN2235025Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN95240790U CN2235025Y (zh) 1995-10-31 1995-10-31 二冲程发动机曲轴箱

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN95240790U CN2235025Y (zh) 1995-10-31 1995-10-31 二冲程发动机曲轴箱

Publications (1)

Publication Number Publication Date
CN2235025Y true CN2235025Y (zh) 1996-09-11

Family

ID=33882306

Family Applications (1)

Application Number Title Priority Date Filing Date
CN95240790U Expired - Fee Related CN2235025Y (zh) 1995-10-31 1995-10-31 二冲程发动机曲轴箱

Country Status (1)

Country Link
CN (1) CN2235025Y (zh)

Similar Documents

Publication Publication Date Title
WO2001006099A1 (en) Reduced volume scavenging system for two cycle engines
CN2235025Y (zh) 二冲程发动机曲轴箱
CN2339759Y (zh) 新型单缸双活塞对置式发动机
CN2235024Y (zh) 二冲程发动机曲轴箱
CN201635791U (zh) 小型四冲程汽油机
WO2003064825A1 (en) Crankcase scavenged internal combustion engine
CN204783254U (zh) 一种滑片转子发动机
EP0119135A1 (en) Internal combustion engine having negative pressure space portion
US3757515A (en) Autocombine engine
EP1282764B1 (en) Improved two-stroke internal combustion engine, with increased efficiency and low emission of polluting gas
US20110030628A1 (en) Two-cycle dry-sump fuel-injected engine
CN207554190U (zh) 以二冲程汽油机燃料进行燃烧和润滑的四冲程汽油机
WO1991015663A1 (en) A double acting, rectangular faced, arc shaped, oscillating piston quadratic internal combustion engine or machine
CN200978692Y (zh) 微型可回转四冲程汽油机
CN110966085A (zh) 一种手持式增压微型发动机
CN2483507Y (zh) 气门压缩式转子发动机
CN210479017U (zh) 一种新型燃油链传动多轴飞行器
CN2453137Y (zh) 立式气缸四冲程摩托引擎
CN2209217Y (zh) 一种新型的摩托车发动机
CN110953064B (zh) 转缸发动机
CN2258229Y (zh) 新型交叠活塞环
CN2462077Y (zh) 二冲程发动机完全分离润滑系统
CN2175310Y (zh) 微型单缸四冲程汽油发动机
CN2229527Y (zh) 二冲程发动机
CN2500818Y (zh) 通过气缸盖进气的二冲程发动机

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee