The advantages of chain drive are: 1, good fault tolerance, low requirements for assembly accuracy, allowing the existence of a small relative error before and after the sprocket; high transmission efficiency, without the need for high-precision machining can reach more than 0.95, while the two-stage gear drive is generally about 0.8. The advantage of gear transmission is: can use closed structure to realize maintenance-free, better withstand the harsh environment of sun and rain. Early in the development of bicycles, engineering lions considered shaft drives. First of all, the cost. In those days since...

1、Chain sprockets are standard parts, which can reduce the design and processing costs. 2、If only one gear is used to drive the output shaft rotation will be reversed, it is inevitable to require an idler in the middle, one more idler and one more set of bearings, the reliability and maintenance become worse, and the weight becomes bigger. Chain does not exist this problem.

Bevel Gear Transmission. Bevel gear transmission, also has the characteristics of cylindrical gear transmission. Features: transmission power range, high efficiency, compact waiting point. As can be seen from the figure, the bevel gear transmission is different from the plane mechanism of cylindrical gear transmission, but the main question mechanism, is used to transfer the movement and power between the two intersections. Its wheel teeth are distributed on the truncated cone, and the tooth shape gradually becomes smaller from the big end to the small end. For the convenience of calculation and measurement, the parameters of the large end of the bevel gear are usually taken as...

Sprocket and gear processing equipment needed 1.General ordinary small lathe, general accuracy, you can also choose a good bit of second-hand lathe, car external dimensions, such as the requirements of the bore lined to the size of the drawings, you need to buy holes with a stop gauge, so that the processing of the bore can ensure that the size of the mismatch 2.General ordinary small planer, the creation of a keyway 3.Hobbing machine, (gear insertion machine does not require) 4.Desktop small drilling machine to drill the tightening of the screw holes 5.Welding machine. Some pieces of larger and lap need to be welded after processing, saving material 6. homemade blackening furnace a...

Rack and pinion transmission will be rotary motion into linear motion, it is the transfer of power, speed range, high efficiency, reliable, long life, compact structure, can ensure a constant transmission ratio. However, such a mechanism can be driven in reverse, that is, the rack and pinion to do linear motion to drive the gear rotation, suitable for large distance transmission, such as machine tool rails under the pallet box to drive the movement of the rack and pinion drive, the rack and pinion mechanism needs to be added to the locking device, because the rack and pinion mechanism...

Rack and pinion design elements 1, according to the rack and pinion load to determine the module 2, according to the rack and pinion structure of the limit of the initial determination of the number of teeth of the gear, so as to determine the size of the gear's diameter 3, refine the design of the rack and pinion mounting 4, consider the rack and pinion limit position at both ends of the limit should be added to the installation of limiting devices, is the electric should be added to the travel switch, is the manual should be installed to limit the mountain (also known as the rest of the block) 5, to consider the rack and pinion lubrication 6 Consider whether the tooth side clearance between the gear and rack needs to be false...