《汽车专业英语》课程教学资源（PPT课件讲稿，英文版）UNIT 8 CLUTCHES, MANUAL TRANSMISSIONS AND DRIVE LINE

PROFESSIONAL ENGLISH unIT 8 CLUTCHES MANUAL TRANSMISSIONS AND DRIVE LINE TEXTA DRIVE LINE

UNIT 8 CLUTCHES, MANUAL TRANSMISSIONS AND DRIVE LINE TEXT A DRIVE LINE PROFESSIONAL ENGLISH

本次课学习内容 UNIT 7 CLUTCHES MANUAL TRANSMISSIONS AND DRIVE LINE TEXTA DRIVE LINE ● Drive shaft ● Universal joint ● Final drive ● Differentia

UNIT 7 CLUTCHES, MANUAL TRANSMISSIONS AND DRIVE LINE TEXT A DRIVE LINE • Drive Shaft • Universal Joint • Final Drive • Differential 本次课学习内容

本次课学习目标 ●掌握传动系统的有关英文专业词汇 ◎能够较好地用已知翻译技巧进行课文翻译 ●训练快速阅读能力,较高的阅读速度 ●能够较熟练地运用“倒译法

本次课学习目标 ⚫ 掌握传动系统的有关英文专业词汇 ⚫ 能够较好地用已知翻译技巧进行课文翻译 ⚫ 训练快速阅读能力，较高的阅读速度 ⚫ 能够较熟练地运用“倒译法”

NEW WORDS graphite[' graefait]n石墨 torsional["t∶∫ana]a扭力的,扭转的 trunnion[ traian]n耳轴 tripod [" tripod]n三脚架,三脚桌 resemble[ri"zemb]v象,类似 ramp [ ramp]n斜坡,坡道,滑道,滑轨 stub [st^b]n树桩,短轴

NEW WORDS graphite ['græ fait] n.石墨 torsional ['tɔ:∫ənəl] a.扭力的, 扭转的 trunnion ['trʌniən] n.耳轴 tripod ['traipɔd] n.三脚架，三脚桌 resemble [ri'zembl] v.象, 类似 ramp stub [ræ mp] [stʌb] n.斜坡, 坡道，滑道，滑轨 n.树桩，短轴

PHRASES AND EXPRESSIONS drive shaft 传动轴 torsional damper 扭转减振器 flexible joint 柔性接头 cross and roller 十字轴式万向节 universal joint cardan universal joint十字轴式万向节,万向节 needle bearing 滚针轴承 Shap ring 卡环 CV ioint 等速万向节 exploded view 分解图 ring gear 齿圈

PHRASES AND EXPRESSIONS drive shaft 传动轴 torsional damper 扭转减振器 flexible joint 柔性接头 cross and roller universal joint 十字轴式万向节 cardan universal joint 十字轴式万向节，万向节 needle bearing 滚针轴承 snap ring 卡环 CV joint 等速万向节 exploded view 分解图 ring gear 齿圈

differential pinion差速器行星齿轮轴 shaft ring gear pinion shaft主减速器主动锥齿轮轴 side gear 半轴齿轮 worm and wheel gear蜗杆蜗轮机构 friction limited-slip摩擦式限滑差速器 differential worm gear 蜗轮副 spur gear 正齿轮,直齿圆柱齿轮 Torsen differential托森差速器

differential pinion shaft 差速器行星齿轮轴 ring gear pinion shaft 主减速器主动锥齿轮轴 side gear 半轴齿轮 worm and wheel gear 蜗杆蜗轮机构 friction limited-slip differential 摩擦式限滑差速器 worm gear 蜗轮副 spur gear 正齿轮，直齿圆柱齿轮 Torsen differential 托森差速器

Drive line Drive shaft The rear-wheel drive shaft is hollow to reduce weight but has a diameter large enough to give the shaft great strength Figure 8-5. Steel, aluminum and graphite are used in drive shaft construction Some have a rubber-mounted torsional damper. TRANSMISSION PROPELLER SHAF丁 FRAME Figure8-5 The rear-wheel drive propeller shaft

Drive Line Drive Shaft The rear-wheel drive shaft is hollow to reduce weight, but has a diameter large enough to give the shaft great strength, Figure 8-5. Steel, aluminum, and graphite are used in drive shaft construction. Some have a rubber-mounted torsional damper. Figure8-5 The rear-wheel drive propeller shaft

a yoke and splined stub(where used) are welded to the ends of a hollow shaft the shaft must run true and be carefully balanced to avoid vibrations [1]. The drive shaft is often turning at high speeds and can cause great damage if bent imbalanced or if there is wear in the flexible joints Universal Joint The cross and roller universal joint sometimes called a cardan universal joint consists of a center cross and two yokes, shown in Figure8-6. The yokes are attached to the cross through needle bearing assemblies, usually called bearing caps. The bearing caps are retained in the yoke by snap rings, U-bolts, or bolted plates. The bearing cap rollers surround the cross ends these cross ends are called trunnions. This allows the yokes to swivel on the cross with a minimum amount of friction

A yoke and splined stub (where used) are welded to the ends of a hollow shaft. The shaft must run true and be carefully balanced to avoid vibrations [1]. The drive shaft is often turning at high speeds and can cause great damage if bent, imbalanced, or if there is wear in the flexible joints. Universal Joint The cross and roller universal joint, sometimes called a cardan universal joint, consists of a center cross and two yokes, shown in Figure8-6. The yokes are attached to the cross through needle bearing assemblies, usually called bearing caps. The bearing caps are retained in the yoke by snap rings, U-bolts, or bolted plates. The bearing cap rollers surround the cross ends. These cross ends are called trunnions. This allows the yokes to swivel on the cross with a minimum amount of friction

Constant Velocity(Cv) Joint Cv joints perform the same functions as the universal joint on rear-Wheel drive vehicles. Cv joints can drive the vehicle and compensate for steering actions while producing less vibration than a universal joint Figure 8-7 illustrates one particular front-wheel drive cv joint and shaft assembly Front-wheel drive axles are equipped with inboard (inside) and outboard (outside)Cv joints. Figure 8-7 shows one such arrangement. Cv joints are used on the front axles of some four-wheel drive vehicles and rear-wheel drive vehicles with independent rear suspensions YOKE CROSS Figure 8-6 Simple universal joint YOKE

Figure 8-6 Simple universal joint Constant Velocity (CV) Joint CV joints perform the same functions as the universal joint on rear-wheel drive vehicles. CV joints can drive the vehicle and compensate for steering actions while producing less vibration than a universal joint. Figure 8-7 illustrates one particular front-wheel drive CV joint and shaft assembly. Front-wheel drive axles are equipped with inboard (inside) and outboard (outside) CV joints. Figure 8-7 shows one such arrangement. CV joints are used on the front axles of some four-wheel drive vehicles and rear-wheel drive vehicles with independent rear suspensions

FRONT DIFFERENTIAL DRNVE SHAFT STRUT COTTER PIN LOCK CAP OUTER RACE SNAP RING AXLE NUT Figure 8-7 INBOARD JOINT COTTER PIN NBOARD JOINT BC。T An exploded BOOT CLAMPS view of a four- OUTBOARD Wheel-drive JOINT BOOt front axle and constant velocity joint DRIVE SHAFT WITH OUTBOARD JOINT

Figure 8-7 An exploded view of a four￾wheel-drive front axle and constant velocity joint