Drum-shaped gear couplings and general-purpose parts on road rollers

　　The drum gear coupling on the roller is used for the connection between the engine and the transmission.In the early days, we used drum-shaped gear couplings. The coupling requirements of this connection structure were as follows: the half coupling should be drilled and tapped on the part connected with the rubber; Out of the spline hole that matches the output shaft of the main clutch of the diesel engine into the input shaft of the gearbox.Moreover, the rubber block on it is subjected to different external forces from the very beginning of assembly (not yet working). The outer side is stretched and the inner side is squeezed. The rubber block will become fatigued and talented over time. In the working state of the machine, it is prone to fatigue and even cracking.For this reason, we chose the most advanced domestic drum gear coupling (standard GB5844-86, see Figure 2).The advantages of this coupling are:
　　(1) The connection strength is high and the transmission torque is large. When the roller adopts the 4135AK-3 diesel engine, its large transmission torque is 4787N·m, and the nominal torque of the tire coupling can reach 6300N·m, which greatly strengthens the 3Y12 /15 The connection performance of this part of the roller.
　　(2) Reduce the requirements of installation accuracy.The coaxiality of the original universal ten-byte or rubber connecting block requires 1.0mm, but it can be reduced to 2.5mm when a tire coupling is used.
　　(3) The drum gear coupling is also a flexible connection, which has obvious protective effect on the engine and transmission when the machine is started and overloaded.
　　(4) The original rubber block connection requires drilling and tapping on the half coupling; when the drum gear coupling is used, the half coupling only needs to be punched instead of tapping.Because the metal nut for connection is embedded in the rubber tire ring, and the flange size of the half coupling can also be reduced, the connection hole is also reduced from the original 8 screw holes to 6 smooth holes; it saves materials , And save processing man-hours.
　　In high-speed and heavy-duty power transmission, couplings belong to the category of general mechanical parts.Some couplings also have the function of buffering, damping and improving the dynamic performance of the shafting.The coupling is composed of two halves, which are respectively connected with the driving shaft and the driven shaft.Generally, power machines are mostly connected with working machines by means of couplings, which are commonly used connecting parts for shaft transmission of mechanical products. In the late 20th century, coupling products at home and abroad have developed rapidly. When designing products, how to choose couplings that can meet the requirements of the machine from a variety of couplings with different performances? For most designers, it is always It is a troublesome problem.Commonly used couplings include diaphragm couplings, gear couplings, plum blossom couplings, slider couplings, drum gear couplings, universal couplings, couplings, flexible couplings And serpentine spring coupling.