同济大学：《汽车构造》课程电子教案（课件讲稿）Chapter 20 车架和车身 Frame and Monocoque Body

Chapter 20 Frame and Monocoque Body 同©大学 TONGII UNIVERSTTY Chapter20:Frame and Monocoque Body

Chapter 20 Frame and Monocoque Body Chapter20:Frame and Monocoque Body

Chapter 20 Frame and Monocoque Body 窗月桥大学 TONGII UNIVERSTTY Main Contents >Function of frame,Requirements of its structure. Classification: >Structural characteristics of fringe-beam frame( 梁式)： >Structural characteristics of backbone type frame (中梁式)； >Structural characteristics of comprehensive type frame: >Structural characteristics of Monocoque Body

Chapter 20 Frame and Monocoque Body Main Contents Function of frame、Requirements of its structure、 Classification； Structural characteristics of fringe-beam frame(边 梁式）； Structural characteristics of backbone type frame （中梁式） ； Structural characteristics of comprehensive type frame； Structural characteristics of Monocoque Body

Chapter 20 Frame and Monocoque Body 窗同海大学 Function of frame Requirements of its structure,Classification Function of frame >Support and connect the components and parts of an automobile, support the weight of the automobile. Requirements of its structure >Meet the need of general arrangement of the car,be able to equip all the components,be easy to dismantle; >Have sufficient rigidity and strength,avoid motion interference caused by deformation of frame; >Meet the requirements of lightweight; >Lower the center of gravity,improve the car's handling stability

Chapter 20 Frame and Monocoque Body Support and connect the components and parts of an automobile, support the weight of the automobile. Meet the need of general arrangement of the car，be able to equip all the components, be easy to dismantle； Have sufficient rigidity and strength, avoid motion interference caused by deformation of frame； Meet the requirements of lightweight； Lower the center of gravity, improve the car’s handling stability. Function of frame、Requirements of its structure、Classification Function of frame Requirements of its structure

Chapter 20 Frame and Monocoque Body 同©大学 TONGII UNIVERSITY Classification Sorted by structure 2 Fringe-beam frar四ey >backbone type frame >comprehensive type frame; >Monocoque Body is a kind of body structure that functions as frame.The whole body supports the weight. It's widely applied to passenger car and coach/bus

Chapter 20 Frame and Monocoque Body Classification Sorted by structure Fringe-beam frame； backbone type frame ； comprehensive type frame； Monocoque Body is a kind of body structure that functions as frame. The whole body supports the weight. It’s widely applied to passenger car and coach/bus

Chapter 20 Frame and Monocoque Body 同©大学 TONGII UNIVERSTTY Classification 中梁（脊梁）式车架 Fringe-beam frame Backbone type frame Comprehensive type frame Monocoque Body

Chapter 20 Frame and Monocoque Body Fringe-beam frame Comprehensive type frame Monocoque Body Classification Backbone type frame

Chapter 20 Frame and Monocoque Body 同©大学 TONGII UNIVERSTTY Classification >The frame can be sorted as perimeter frame,xshaped frame and Ladder tpe frame according to the shape of its longeron and the structural characteristics 4-4 B-B C-( E-E F-F d 前轮中心 后轮中心 轿车梯形车架

Chapter 20 Frame and Monocoque Body Classification The frame can be sorted as perimeter frame, x-shaped frame and Ladder type frame according to the shape of its longeron and the structural characteristics

Chapter 20 Frame and Monocoque Body 同©大学 TONGII UNIVERSTTY Section 1:Fringe-Beam Frame >Components of fringe-beam frame:two longerons and several crossbeans welded or riveted together. 10 longeron 16 17181920 crossbeam

Chapter 20 Frame and Monocoque Body longeron crossbeam Components of fringe-beam frame: two longerons and several crossbeams welded or riveted together. Section 1: Fringe-Beam Frame

Chapter 20 Frame and Monocoque Body 同©大学 TONGII UNIVERSTTY Longeron >Longeron is stampedby low-carbon alloy steel; >Mid part of its cross section is thick and both ends are thin,so that the stress is even. 1617181920

Chapter 20 Frame and Monocoque Body Longeron is stamped by low-carbon alloy steel; Mid part of its cross section is thick and both ends are thin, so that the stress is even. Longeron

Chapter 20 Frame and Monocoque Body 同©大学 TONGII UNIVERSTTY Longeron >The shape of cross section of longeron can be open (such as Z shape or groove shape)or close (such as box shape) O(n 槽形 叠槽形 叠槽形如 礼帽箱形 对接箱形 管形

Chapter 20 Frame and Monocoque Body The shape of cross section of longeron can be open (such as Z shape or groove shape) or close (such as box shape) Longeron

Chapter 20 Frame and Monocoque Body 同©大学 TONGII UNIVERSTTY Crossbeam >Crossbeam is also stamped by low-carbon alloy steel In order to enhance the torsional strength of frame,The shape of cross section of crossbeam can be box shape or tube shape; >Generally a frame has a front crossbeam,engine mounting beam,cab mounting beam,suspension mounting beam,rear crossbeam and so on. Suspension mounting beam Engine mounting beam Forth cross bean Front crossbeam Rear crossbeam 17181920 Cab mounting beam

Chapter 20 Frame and Monocoque Body Crossbeam is also stamped by low-carbon alloy steel . In order to enhance the torsional strength of frame, The shape of cross section of crossbeam can be box shape or tube shape; Generally a frame has a front crossbeam, engine mounting beam, cab mounting beam, suspension mounting beam, rear crossbeam and so on. Front crossbeam Engine mounting beam Cab mounting beam Rear crossbeam Suspension mounting beam Forth cross beam Crossbeam