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SD7高驱动履带式推土机是由宣化工程机械厂自行研制开发的。其主要特点是:驱链轮高置、液力机械传动、液压操纵、半刚性悬挂,功率为162kW。 该机突破了传统的履带推土机设计方案,驱链轮脱离了行走架,高置于终传动、转向与制动、中央传动所处的同一轴线之上,履带呈非等腰三角形。这种设计避免了地面直接传递到驱链轮且通过驱链轮传递到传动系统的垂直冲击载荷,减少了链轮与履带销套之间的磨损,提高了传动系统的寿命,减小了传动系统的重量。行走架与机架为枢轴式铰接,提高了行走架与机架
The SD7 high-drive crawler bulldozer was independently developed by Xuanhua Engineering Machinery Factory. Its main features are: drive sprocket high, hydraulic mechanical transmission, hydraulic control, semi-rigid suspension, power 162kW. The machine broke through the traditional design of crawler bulldozers, driving the sprocket out of the walking frame, high placed on the same axis of the final drive, steering and braking, the central drive, track is an isosceles triangle. This design avoids the vertical impact load that the ground directly transmits to the drive chain wheel and is transmitted to the drive system through the drive chain wheel, which reduces the wear between the sprocket wheel and the track pin bushing, improves the service life of the transmission system, and reduces the transmission. The weight of the system. Pedestrian articulation between the walking frame and the frame improves the walking frame and the frame