自動攪拌車的方向盤是攪拌車的控制部件和轉向系統(tǒng)的一部分。整個轉向機構的原理是通過齒輪齒條將圓周運動變?yōu)橹本€運動，推動車輪轉動。在物理學中，方向盤本身就是一個杠桿。攪拌車方向盤的半徑是力臂的長度。方向盤越大，越省力。

The steering wheel of the automatic mixer is a part of the control component and steering system of the mixer. The principle of the whole steering mechanism is to change the circular motion into the linear motion through the gear rack to drive the wheel to rotate. In physics, the steering wheel itself is a lever. The radius of the mixer steering wheel is the length of the force arm. The larger the steering wheel, the less effort.

攪拌車的舵機可分為幾種類型。常見的是齒輪齒條轉向機和循環(huán)球轉向機。齒輪齒條式轉向系統(tǒng)已迅速成為密煉機和小型密煉機常用的轉向系統(tǒng)。其工作機理非常簡單。攪拌車的齒輪齒條組用金屬管包裹。

The steering gear of mixer truck can be divided into several types. The common ones are rack and pinion steering gear and recirculating ball steering gear. Rack and pinion steering system has rapidly become a common steering system for internal mixer and small internal mixer. Its working mechanism is very simple. The gear rack set of the mixer truck is wrapped with metal pipes.

齒條的每個齒端伸出金屬管，并用拉桿連接在一起。小齒輪與轉向軸相連。轉動方向盤時，齒輪轉動，帶動齒條運動。攪拌車機架每個齒端的橫拉桿連接到轉向軸的轉向臂上。

Each tooth end of the rack extends out of a metal tube and is connected together with a pull rod. The pinion is connected to the steering shaft. When the steering wheel is turned, the gear rotates to drive the rack. The tie rod at each tooth end of the mixer frame is connected to the steering arm of the steering shaft.

目前許多攪拌車采用循環(huán)球轉向系統(tǒng)。車輪的拉桿與齒輪齒條式轉向系統(tǒng)略有不同。攪拌輪的拉桿與齒輪齒條轉向系統(tǒng)略有不同。循環(huán)球系統(tǒng)的動力轉向原理與齒輪齒條系統(tǒng)相似。其輔助動力還通過向金屬塊的一側注入高壓液體來提供。

At present, many mixer trucks use the circulating ball steering system. The pull rod of the wheel is slightly different from the rack and pinion steering system. The pull rod of the mixing wheel is slightly different from the gear rack steering system. The power steering principle of the recirculating ball system is similar to that of the rack and pinion system. The auxiliary power is also provided by injecting high-pressure liquid into one side of the metal block.

此外要想攪拌車延長使用壽命就需要做到幾點：當軸承的壽命終了時，電動機運行的振動及噪聲將明顯增大，檢查軸承的徑向游隙達到下列值時，即應更換軸承。使用環(huán)境應經(jīng)常保持干燥，電動機表面應保持清潔，進風口不應受塵土、纖維等阻礙。應保證電動機在運行過程中良好的潤滑。

In addition, in order to prolong the service life of the mixer truck, it is necessary to do several things: when the service life of the bearing ends, the vibration and noise of the motor will increase significantly. When the radial clearance of the bearing reaches the following values, the bearing should be replaced. The operating environment should always be kept dry, the motor surface should be kept clean, and the air inlet should not be obstructed by dust, fiber, etc. The motor shall be well lubricated during operation.

自動攪拌車更換繞組時必須記下原繞組的形式，尺寸及匝數(shù)，線規(guī)等，當失落了這些數(shù)據(jù)時，應向制造廠索取，隨意更改原設計繞組，常常使電動機某項或幾項性能惡化，甚于無法使用。當電動機的熱保護連續(xù)發(fā)生動作時，應查明故障來自電動機還是超負荷或保護裝置整定值太低，故障后，方可投入運行。拆卸電動機時，從軸伸端或非伸端取出轉子都可以。

When replacing the winding of the automatic mixer truck, the form, size, number of turns, wire gauge, etc. of the original winding must be recorded. When these data are lost, they should be obtained from the manufacturer, and the original design winding should be changed at will, which often deteriorates the performance of one or more items of the motor, or even can not be used. When the thermal protection of the motor acts continuously, it is necessary to find out whether the fault is from the motor or overload or the setting value of the protection device is too low. The motor can be put into operation only after the fault is eliminated. When disassembling the motor, take out the rotor from the shaft extension end or non extension end.

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