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Lower connection rod and engine with same

An engine and connecting rod technology, applied in the direction of machine/engine, mechanical equipment, etc., can solve the problems of complex assembly, large force, strict structural design requirements, etc., to reduce assembly procedures, improve force, and improve work reliability. Effect

Active Publication Date: 2019-09-27
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the typical structure for changing the position of the top dead center of the engine piston is a multi-link mechanism. The lower connecting rod is connected to the connecting rod neck of the crankshaft. However, when the engine is working, the lower connecting rod is under the greatest force due to the inertial force. Strict structural design requirements and complex assembly

Method used

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  • Lower connection rod and engine with same
  • Lower connection rod and engine with same
  • Lower connection rod and engine with same

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Embodiment Construction

[0058] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0059] The following will refer to Figure 1-Figure 28 The present invention will be described in detail in combination with examples.

[0060] refer to Figure 1-Figure 3 As shown, the engine can include: a piston 1, an upper connecting rod 2, a lower connecting rod 3, a crankshaft 4 and a compression ratio adjusting mechanism 7.

[0061] Specifically, the lower connecting rod 3 of the embodiment of the present invention is adapted to be hingedly connected with the crankshaft 4 of the engine, and the piston 1 can move in the cylinder of the engine, combined with Figure 1-Figure 2 As shown, the piston 1 can move along the cylinder bore of the cylinder Figure 1-Figure 2 up and down movement.

[0062] The main journal 41 of the crankshaft 4 is rotatably arranged on the cylinder block of the engine, and t...

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PUM

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Abstract

The invention discloses a lower connection rod and an engine with the same. A center hole matched with a crankshaft is formed in the lower connection rod. The lower connection rod comprises an upper connection rod part and a control connection rod part. The upper connection rod part is connected with the control connection rod part. At least one connection point is a rotation connection point. The rotation axis of each rotation connection point is parallel to the axis of the center hole. According to the lower connection rod, the upper connection rod part and the control connection rod part can relatively rotate around the rotation connection points, and therefore the assembly process of the lower connection rod and the crankshaft is simplified, and the assembly difficulty is lowered; and at the positions of the rotation connection points, the upper connection rod part and the control connection rod part are connected in a rotating manner through hinge pins, and therefore the improvement of the stress of the lower connection rod is facilitated.

Description

technical field [0001] 本发明涉及汽车领域,具体而言,涉及一种下连杆及具有其的发动机。 Background technique [0002] 发动机的压缩比是指活塞运动到下止点时的气缸容积与活塞运动到上止点时的燃烧室 容积之比。现有发动机大多数为固定压缩比发动机,燃油燃烧效率低、经济性差、排放高。 随着可变压缩比技术的发展,发动机开始增加压缩比调节机构,通过改变活塞上止点位置 等方式改变燃烧室容积,从而改变压缩比,以满足不同发动机负荷需求,使发动机始终工 作在最佳工作区,这样既提高了动力性降低了油耗,又减少了排放,很好地解决了动力性 与经济性、排放性的矛盾。 [0003] 目前典型的改变发动机活塞上止点位置的结构为多连杆机构,其下连杆与曲轴的连杆 颈相连接,但是在发动机在工作时,下连杆因为惯性力原因,受力最大,结构设计要求严 格,且装配复杂。 Contents of the invention [0004] 有鉴于此,本发明旨在提出一种下连杆,以优化下连杆的装配工艺。 [0005] In order to achieve the above object, technical solution of the present invention is achieved in that way: [0006] 一种下连杆,所述下连杆上设置有与曲轴配合的中心孔,所述下连杆包括:上连杆部、 控制连杆部,所述上连杆部与所述控制连杆部相连接,且至少一个连接点为转动连接点, 所述转动连接点的转动轴线与所述中心孔的轴线平行。 [0007] 根据本发明的一些实施例,在所述转动连接点处,所述上连杆部和所述控制连杆部通 过铰接销实现转动连接。 [0008] 进一步地,所述上连杆部和所述控制连杆部两者中的其中一个上设置有铰孔座,另一 个上设置有连接臂,所述铰孔座和所述连接臂上设置有用于安装所述铰接销的铰接销孔。 [0009] 可选地,所述连接臂包括两个沿所述铰接销轴线方向间隔设置的第一连接臂和第二连接臂,所述铰孔座夹设于所述第一连接臂和第二连接臂 between. [0010] 可选地,所述铰孔座为单个铰孔座。 [0011] 可选地,所述铰孔座包括两个沿所述铰接销轴线方向间隔设置的第一铰...

Claims

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Application Information

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IPC IPC(8): F02B75/04F02B75/32
CPCF02B75/04F02B75/32
Inventor 刘涛刘俊杰林文钟德华渠娜张树旻杨乐姜志永尹吉刘君宇董高峰苏旭朝王文远
Owner GREAT WALL MOTOR CO LTD