小拖拉机执行大任务课程毕业设计外文文献翻译、中英文翻译、外文翻译

SMALL TRACTORS TARGET BIG PERFORMANCE After introducing both its large chassis 4000 and mid-chassis 3000 Twenty series tractors last year, John Deere recently focused on the compact end of the range, launching new models in its small-chassis 2000 Twenty series. Two tractors are new to the 2000 Twenty series, the 24 hp 2320 and 26.5 hp 2520, and a third, the 24 hp 2305, has been added to Deere s 2000 series compact utility line. “ More customers are in need of a machine that can perform large mowing jobs in addition to light-duty chores that can t be done with standard lawnmowers, such as loader and/or box blade word,”  said Sean Sundberg. Deere brand manager, compact utility tractors. “ John Deere responded with our new small-chassis tractors that help customers select the right tractor for the right job at the right price.”  With the Twenty series extending across 10 models ranging from 24 to 58 hp, the 2320 and 2520 are the smallest offerings in the lineup. The new 2320 replaces Deere s 4110model, which was part of its 4000 Ten series line and is still limitedly available. The 2320 tractor has “ big tractor”  features Deere said, offering more hp then its predecessor as well as ROPS, position control three-point hitch and cruise control as standard. A step up from the 2320 is the new 2520 Twenty series tractor which also includes a “ big tractor”  design with more horsepower, a direct injection engine, more hydraulic capacity and larger tires. The 2520 replaces Deere s 4115 compact utility tractor. Also new to the small chassis lineup is the 2305 tractor, which fills Deere s need for an entry-level tractor to allow new operators to easily and intuitively operate the tractor. Which fills Deere s need for an entry-level tractor to allow new operators to easily and intuitively operate the tractor. It targets large property homeowners and replaces Deere s 2210 model. “ The 2305 is a small but powerful tractor, which makes it ideal for lawn chores, pasture maintenance, work in tight spaces, and a variety of other property tasks,”  said Sundberg. “ Whether it is mowing, hauling, loading or tilling, the 2350 has the versatility and power to tackle most any job easily and efficiently and at a significantly lower price than what was previously available.”  Powering the three new tractors are Yanmar Tier 2TNV series diesel engines rated 24, 26.5 and 24 hp at 3000 rpm. A 1.115 L three-cylinder naturally aspirated Yanmar engine is installed in both the 2320 and 2305 machines while a larger 1.33 L three cylinder platform is installed on the 2520. According to Deere, the 2320 and 2520 tractors have 11% more hp then their predecessors, which were rated 20 and 24 hp. The Yanmar engines are configured with a Trad radiator and Blissfield oil cooler cooling package. The tractors  two-speed infinitely variable hydrostatic ground drive provides infinite speed selection without clutching or shifting, and a integrated differential lock is designed to integrated differential lock is designed to increase the tractors  traction and pulling power. The drive is powered by a Kanzaki variable displacement axial piston pump, which is transmission mounted and direct driven off the engine. This 14 cu.in. (11 cu.in. in the 2305) pump drives Kanzaki fixed displacement axial piston wheel motors in the same cu.in. displace ment. This “ U”  style configuration uses mechanical control and is configured with a Kanzaki axle package. Additional auxiliary hydraulic flow is powered on the smaller 2320 and 2305 tractors by a Kanzaki gear pump that is transmission mounted. This pump has a 6.1 cu.in. displacement in the 2320 tractor and 5.5 cu.in. displacement on the 2305 machine and are used to supply the steering, remote coupler circuit, three-point hitch, and depending on model, PTO clutch. The 2520 tractor, the larger of the three machines, uses two Kanzaki gear pumps to power the same circuits. These pumps have a 4.9 cu. n. displacement and are mounted off the engine. A clutch-driven PTO is available at both the mid and rear of the 2000 Twenty series tractors rated 18 hp on the 2305 and 2320, and 20hp on the 2520. The mid-PTO placement allows the tractors to use Deere s 54D and 64D mower decks which have drive over capability for improved attachment versatility. “ A common request from our customers was to have quick and easy attachment and removal of mover decks,”  said Sundberg. “ John Deere responded by introducing the next generation of midmount mowers providing not only the flawless cut quality to which John Deere is known, but also best-in-class attachability.”  The tractors also have a new sloped hood design which provides greater visibility, especially when using the loader just one of the many attachments available with the tractors. Others include front blades, rotary brooms and cutters, mowers, snowblowers/throwers and tillers. A backhoe is also offered on the 2320 and 2520 for more versatility. Other standard features of the 2000 Twenty series tractors include four-wheel drive, position control rockshaft, standard steering brakes, and high-backed contoured suspended operator seat. Power steering and Deere s ergonomic Twin Touch two-pedal foot controls are also included. “ While homeowners will appreciate their versatility, ease-of-use and maneuverability, commercial customers will value the comfort, stability, efficiency and power of the new 2000 Twenty series tractors,”  said Sundberg. Deere will begin offering the 2320 2000 Twenty tractor in summer of 2006 while dealer shipment on 2520 and 2305 tractors has already begun. Traction Control Lifts Genie In Rough Terrain Enhancing one of its most popular lift models, Genie Indus tries has introduced a new traction control drive system on its GS-68Rtseries of rough terrain scissor lifts. Available on both the GS-2668RT and GS-3268RT lifts, two of six models Genie offers in its rough terrain series, the new drive system provides enhanced traction, giving the scissor lifts additional capability in wet and uneven terrain. “ Our customers, especially those in the Northeast, face some pretty severe conditions,”  said John Norton, Genie product manager. “ Depending on season, they can be up to their ankles in mud, knee deep in snow or covered with ice.”  Now with the traction control drive. Norton said, “ we took a really good machine and made it a great machine. It has greater utilization and can get to more areas in rough terrain environments.”  Designed for both indoor and out door applications, the GS-2668RT and GS-3268 RT scissor lifts are available with diesel, gasoline or propane power options, all of which are located on a swing-out engine tray for easier service access. The diesel power option is either a 0.90 L three-cylinder Kubota D905 engine rated 20 hp or a 1.13 L three-cylinder Perkins 403C-11 engine rated 26 hp. The Kubota engine is prepackaged with a Donaldson air cleaner and a Denso radiator, while the Perkins diesel is equipped with those components at Genie s Redmond, Wash., manufacturing facility. The machines can also be equipped with a dual fuel (gasoline and propane) option, which is a 0.75 L three cylinder Kubota DF752-EWZ engine rated 23 hp. Genie improved the hydraulic drive system by giving independent wheel control to both the 32 and 38ft. working height lifts. “ When we set out to improve the traction, we knew we had to take it one wheel at a time,”  said Norton. Genie s other rough terrain scissor lifts (the GS-3384 RT, GS-3390 RT, GS-4390 RT and GS-5390 RT) feature a similar traction drive that uses a closed-loop figuration. Beefing up the traction control drive system on the GS-2668 RT and GS-3268 RT required adding a HydraForce combiner/divider valve to the circuit, which directs flow from the Bosch Rexroth two-section hydraulic pump (0.488 cu.in. displacement per section) to White Drive Products motors mounted at the wheels. It is the combiner/divider valve that ensures flow reaches each wheel independently, allowing maximum ground power even during loss of contact. When a wheel loses contact with the ground, the traction drive is designed to maintain 75% power. Displacement in each of the wheel motors was also increased from 28.3 cu.in. to 32.7 cun.in., which Norton said improves gradability, giving the lifts access to 35 to 40% grades. It is also designed to reduce the average drive pressure, which minimizes wear and tear. Other features of the drive system include two drive modes: a parallel mode which assists in uphill travel using a slower speed with maximum torque; and a series mode which is ldeal for operation on flat, level ground, operating at a higher travel speed with less torque. Both machines are four wheel drive, have dynamic braking, a spring applied hydraulic release parking brake and foam-filled tires. Inside turning radius on the machines is 5 ft. The drive system hydraulics on GS-2668 RT and GS-3268 RT models also power the work platform. The two-section Bosch Rexroth pump supplies flow to Dongyang hydraulic lift cylinders to raise and lower the 66 sp.ft platform, operated by an electronically controlled Hall effect joystick which Norton said provides “ smoother control, particularly on rough terrain.”  Lift capacity on the work platform is 1000 to 1250 lb. The GS-2668 RT and GS-3268 RT lifts are available with a series of options such as automatic leveling hydraulic outriggers, a 2 KW generator to power hand tools, cold-start package and a series of light systems. A hot weather kit is standard on the machines. Weights on the GS-2668 RT and GS-3268 RT are 6373 and 8008 ld. Genie began offering the new traction control drive system on the GS-2668 RT and GS-3268 RT scissor lifts last fall. Both machines are manufactured at its Redmond, Wash, headquarter facilities. 小拖拉机执行大任务  在约翰 Deere去年推出大型汽车底盘 4000和中型汽车底盘 3000二十级拖拉机后，他最近又置身于一系列坚实底盘的研究，推出了新型的小型汽车底盘 2000二十级，其中两个对于 2000 二十级来说是新型的，是 24 马力 2320 和 26.5 马力2520，第三个是 24 马力 2305，这个给 Deere 的 2000 级的紧密效用线提供了新的产品。  “更多的顾客需要 一种机器，这种机器既能完成大型的割草工作，又能做那种轻松的但是令人讨厌的工作，而这种工作又是普通的割草机不能完成的。例如装货设备或者箱子切割机。” Sean Sundberg 说。 Deere 这个王牌经理，坚实的效用拖拉机。“约翰回答用我们新的小型汽车底盘拖拉机可以帮助顾客用合理的价格为合适的工作选择合适的拖拉机。”  在可以从 24 马力到 58 马力的十种二十级拖拉机中， 2320 和 2520 是这个团体中最小的，这种新型的 2320 取代了 Deere 的 4110 型号机器，她是它的 4000十级的一部分，而且仍在有限的使用。 Deere 说这种 2320 拖拉机有大拖拉机的特点，可以比它的前任者像 ROPS 这种机器提供更多的马力，位置控制三处连接和航行控制。  这个新的 2520 二十级拖拉机是 2320 中的一部分，它也有一个有更大马力的“大拖拉机”设置，一个直接的喷射机器，更多的水压容量和更大的轮胎，这种2520 取代了 Deere 的 4115 致密实用拖拉机。  2305 拖拉机对于小型汽车底盘团体也是新型的，它满足了 Deere 对一种进入水平的拖拉机的需要，这种拖拉机可以给操作者提供容易的直观的操作。它以富有的房主为目标，取代了 Deere 的 2210 型。“ 2305 型是小，但是是效力很大的拖拉机，它可以使那它是在割草，拉东西，装载货物或者耕种， 2350 都能应用自如地，强有效地，轻松地，有效率的解决所有的工作，而且是以比其他明星都低的价格。  使这三种新型拖拉机云做的是 Yanmar Tier 2TNV 级柴油引擎，它从 24， 26.5和 24 马力，每分钟 3000 转， A1.115L，三滚筒自然吸气 Yanmar 机器被安装在2320 和 2305 上，同时一个更大的 1.33L 的三滚筒操作平台被安装到 2520 上，从 Deere 可知， 2320 和 2520 拖拉机，比它们的前任者多 11%多的马力，它 们是从 20 到 24 马力， Yanmar 机器由传统的拖拉机和 Blissfield，汽油冷却机冷却组件配置成形。  这个拖拉机的两个速度的无限可变流体静力的地面发动机提供不用踩放（离合器）改变方向的无限选择。一个综合的不同的水闸被设计出来阻止拖拉机的阻力和拖力。这个发动机是由 Kanzaki 多变的排水轴活塞，泵起作用的，它是传送装置和直接发动机器的，这个 14 控制 2305 中的 11 控制 泵使 Kanzaki 排水轴轮，发动机安装在同样的控制器上。这种“ U”型结构，使用了机械控制，而且它是用 Kanzaki 轴轮组件组成的。  另外 ，辅助水力流动以小型的 2320 和 2305 拖拉机为动力由 Kanzaki 齿轮泵起控制，这个泵是传送装置，它在 2320 拖拉机上有 6.1 控制排水量和在 2305机器上有 5.5 控制排水量，它被用来提供操舵，控制连接系统和三处连接点，而且依靠 PTO 离合器来工作。  2520 拖拉机，即三种机器中最大的一个，用了两个 Kanzaki 辅助泵去控制同样的线路，这种泵有 4.9 排水量，而且没有安装机器。  一个发动离合器的 PTO 对于 2000 二十级拖拉机的中间和边缘都合适，它们从 2305 和 2320 和 18 马力到 2520 的 20 马力，这个中间 PTO 装置让拖拉机使用 Deere 的 54D 和 64D 的割草装置，它有提高附件性的功能。“我们顾客中一个普通的要求是有快，易的附件和移动的发动装置。” Sundberg 说，“约翰 Deere用介绍下一代不仅有完美无缺的，约翰已经知道的切割能力，而且也是最高级的能力的中型切割机回答。”  这种拖拉机还有一种新的有盖的设计，这种设计提供了更大的能见度，尤其是当仅仅有一种适合于拖拉机的可用的装置设备的时候，其他的包括前叶片，旋转机，切割机，割草机和铲雪机和舵柄，一个反铲挖土机也为 2320 和 2520 提供了更多的功能。  其他的 2000 二十级标准拖拉机，包罗四轮发动位置操控，摇轴，标准操舵制动器和高阻止外形中止作为，效能操舵和 Deere 的人机工程的双接触两踏板，脚控也包括在内。“当房主欣赏他们的多功能时易用和可调遗性，商业顾客会肯定新 2000 二十级拖拉机的方便、稳固、功效和能力的。” Sanberg 说。  当 2520 和 2305 的处理装运已经开始的时候， Deerej 将在 2336 年的夏天推出 2000 二十级拖拉机。  崎岖地区的牵引控制升降机  为了提升他们最受欢迎的一款升降机， Genie 公司在他们的使用与崎岖地区GS-68Rtseries 剪 刀型升降机上采用了牵引驱动系统。这项技术应用于 Genie公司生产的适用于崎岖地区系列的六种型号中的 GS-2668RT和 GS-3268RT两种型号。这个新驱动系统提供加强牵引力，提升了