1 / 17

Final Drive

Final Drive. Contents. Pre-questions. II. Text Explanation. III. Exercises. Pre-questions. What’s the function of the final drive ?

bramblett
Download Presentation

Final Drive

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Final Drive

  2. Contents • Pre-questions II. Text Explanation III. Exercises

  3. Pre-questions • What’s the function of the final drive ? • The final drive is the main component in the transmission line to reduce speed and increase the torque. In the mean time it can change the direction of torque when the motor is longitudinal. Diagram of car showing clutch location

  4. Pre-questions • How does the final drive work ? • The final drive depends on the gear wheel with less number of teeth driving the other one with more teeth to achieve the retardment. And the use of conical gear also can change the direction of torque .

  5. Pre-questions • How many types does the final drive have? What are they ? • According to the number of sub-gear pairs which take part in the retardment, the final drive can be divided into single-stage and two-stage type. • According to the number of sub-files of the transmission ratio, the final drive can be divided into single speed and two-speed type. • According to the sub-structure of reduction gear pairs, the final drive can be divided into the cylindrical gear type, the bevel gear type , the hypoid gear type and so on.

  6. II. Text Explanation Fig.3-5 Final Drive 1-half axle gear; 2-planetary gears; 3-differential housing; 4-ring gear; 5-pinion

  7. II. Text Explanation • It depends on the gear wheel with less number of teeth driving the other one with more teeth to achieve retardment. • 译文：它是依靠齿数少的齿轮带动齿数多的齿轮来实现减速的 。

  8. II. Text Explanation • In order to meet different requirements of the application, the structures of final drive are different. • 译文：为满足不同的使用要求，主减速器的结构型式也是不同的 。

  9. II. Text Explanation • Apart from some medium and heavy vehicles which require of large transmission ratio using two-stage main reducer, the general micro-, light and some medium ones usually adopt the single-stage main reducer. • 译文：除了一些要求大传动比的中、重型车采用双级主减速器外，一般微型、轻型和一些中型车通常都采用单级主减速器 。

  10. II. Text Explanation • In two-stage main reducer, if the second-class gears are in the vicinity of the wheel, the two wheels are in nature two independent parts known as the wheel reducer. • 译文：在双级式主减速器中，若第二级齿轮在车轮附近，这两个车轮实际上成了两个相互独立的部件，被称为轮边减速器 。

  11. II. Text Explanation • When the drive gear axis moves downward, the location of transmission shaft can be reduced, which helps to low the vehicle body and the vehicle’s center of gravity, improving the vehicle stability. • 译文：当主动齿轮轴线向下偏移时，可以降低传动轴的位置，从而有利于降低车身及整车重心高度，提高汽车的行驶稳定性 。

  12. main reducer single-stage main reducer planetary gears cylindrical gear dual-stage main reducer wheel reducer transmission ratio auxiliary transmission center of gravity vehicle stability 主减速器 单级主减速器 行星齿轮 圆柱齿轮 双级主减速器 轮边减速器 传动比 副变速器 重心 车辆稳定性 III. Exercises • I. Translate the following expressions into Chinese.

  13. III. Exercises • II. Identify the English names of final drive according to the picture. • 1- ring gear; 2- half axle gear; 3- half axle; • 4- planetary gears; 5- drive shaft

  14. III. Read the following passage carefully and fill in the blanks with the proper form of the given words. • The final drive is used to (transfer) the engine power from the (drive shaft ) to the rear (wheels ). In addition to transferring power, it must cause the power to make a 90° (turn ) between the drive shaft and wheels, and provide the (correct ) axle ratio. There is no choice of final drive ratios that gives the “best” performance at all (speeds ). The gear ratio is (proportional) to ratio of the gear diameters and proportional to the ratio of gear speeds. The gear teeth of (driven ) gear are more than the (driving) gear. There are many types of gear shape, but the type of the driving and the driven must be consistent.

  15. IV. Translate the following sentences into Chinese. • 1. Driven bevel gear is fixed on the differential shell while the differential shell is fixed on the main reducer shell by two tapered roller bearings. • 1.从动斜齿轮安装在差速器壳上，差速器壳通过两个圆锥滚子轴承安装在主减速器壳上。

  16. IV. Translate the following sentences into Chinese. • 2. These two bearings installed in the holes of the main reducer bearing shell and was level axial positioned. • 2.这两个轴承安装在主减速器轴承壳座孔内，起轴向水平定位的作用。

  17. Thank You !

More Related