Category: Chains and sprockets

Gear transmission air return and elimination method

1. Backlash and Factors Causing Backlash Backlash refers to the phenomenon where the driven gear lags behind when the driving gear rotates in the opposite direction. The lag angle is called the backlash error angle. The main cause of backlash is the presence of backlash in a pair of gears. Theoretically, a pair of meshing gears can be backlash-free. However, in some cases, backlash is necessary for the normal operation of the transmission. The presence of backlash prevents gear teeth from jamming due to machining errors; it also provides space for storing lubricating oil and accommodates changes in part dimensions due to temperature variations. However, the backlash error caused by backlash in reverse transmission directly affects transmission accuracy. The main factors causing backlash are: regarding the gears themselves, these include increased center distance, tooth thickness deviation, base circle eccentricity, and tooth profile errors. In addition, factors such as eccentricity of the gear mounted on the shaft, radial runout of the rolling bearing race, and the fit clearance between the fixed race and the housing…

Analysis of hypoid gear characteristics

First, the 90° angle between the shafts of a hypoid gear allows for a 90° change in torque direction, a common requirement in the automotive, aviation, and wind power industries. Simultaneously, the meshing of a pair of gears of different sizes and numbers of teeth tests the function of increasing torque and decreasing speed, commonly known as "torque boosting and speed reduction." If you've driven a car, especially a manual transmission car, your instructor will tell you to shift to a lower gear when climbing a hill; this involves selecting a gear pair with a higher gear ratio to provide greater torque at lower speeds, thus providing more power to the vehicle. So what are the characteristics of a hypoid gear? First, the change in the torque transmission angle, as mentioned above, allows for changes in the angle of torque power. This enables it to withstand greater loads in the wind power and automotive industries, whether it's passenger cars, SUVs, or…

Current mainstream trend in bevel gears:

A. Machining zero-degree spiral bevel gears replaces machining straight bevel gears. B. Machining bevel gears is suitable for helical gear systems such as Gleason spiral gears and Olecon cycloidal gears. C. Mold processing uses spherical involute straight bevel gears and spherical involute equidistant helical bevel gears. D. CNC forming is suitable for various gear systems, but the tooth profile generally uses spherical involute.

Product Applications of Chain

         Timing chains, chain specifications, chain conveyors, conveyor chains, lifting chains, stainless steel chains, chain drives. Chains, also known as roller chains, may be unfamiliar to many when it comes to product applications, but they are used in various mechanical equipment. These include transmission chains, conveyor chains, automotive transmission chains, motorcycle chains, agricultural machinery chains (harvesting equipment, etc.), forklift chain chains (lifting equipment, etc.), escalator chains, bulk material conveying chains, construction machinery chains (pavers, etc.), sugar refining machinery chains, palm oil machinery chains, and stainless steel chains for food machinery (such as conveyor chains for pancake machines in Linyi).

Structural design of sprockets

The sprocket tooth profile must ensure smooth and easy engagement and disengagement of the chain links, minimizing impact and contact stress during engagement, and should be easy to machine. A commonly used sprocket end face tooth profile is shown in Figure 1. It consists of three circular arcs aa, ab, and cd, and a straight line bc, referred to as the three-circular-arc-straight-line tooth profile. The tooth profile is machined using standard cutting tools. It is not necessary to draw the end face tooth profile on the sprocket working drawing; simply indicate "tooth profile manufactured according to 3RGB1244-85 specifications" on the drawing. However, the axial tooth profile of the sprocket should be drawn, as shown in Figure 2. Refer to relevant design manuals for its dimensions. Parameter calculations have already been mentioned and will not be repeated. Figure 3 shows four commonly used sprocket structures. Small-diameter sprockets are generally made as a single piece (Figure 3a), medium-diameter sprockets are often made as spokes, with holes in the spokes for ease of handling, mounting, and weight reduction (Figure 3b), large-diameter sprockets…

Maintenance of sprocket chain

1. The chain tension should be appropriate. Too tight a chain increases power consumption and causes bearing wear; too loose a chain leads to sprocket jumping and chain derailment. The ideal chain tension is approximately 21-31/3t of the center distance between the two sprockets when lifted or pressed down from the middle. 2. The sprockets mounted on the shaft should not wobble or tilt. In the same transmission assembly, the end faces of the two sprockets should be in the same plane. When the center distance between the sprockets is less than 0.5 meters, a deviation of 1 mm is acceptable; when the center distance is greater than 0.5 meters, a deviation of 2 mm is acceptable. However, there should be no friction between the sprocket teeth sides. Excessive misalignment can easily cause chain derailment and accelerated wear. When replacing sprockets, the misalignment must be checked and adjusted. 3. When sprockets are severely worn, both the sprocket and chain should be replaced simultaneously to ensure good meshing. Do not replace only the sprocket or chain. Otherwise, poor meshing will accelerate the wear of the new sprocket or chain. After the sprocket teeth wear to a certain extent, they should…