Oldham slider coupling, also known as metal slider coupling, consists of two half couplings with grooves on the end faces and an intermediate disc with convex teeth on both sides.Because the convex teeth can slide in the groove, the relative displacement between the two shafts during installation and operation can be compensated.The slider is circular and made of steel or wear-resistant alloy.It is suitable for transmission with low speed and large transmission torque.In order to reduce friction and wear, oil should be injected from the oil hole of the middle plate for lubrication during use.
This type of Oldham coupling is more suitable for some rigid torque transmission couplings, and its sensitivity is particularly strong. It is a coupling with special effects in terms of zero backlash.Its structure is particularly simple. Under normal circumstances, 45 steel is used. After surface heat treatment, its hardness is increased to a certain extent.However, some manufacturers use Q275 steel separately, so that heat treatment is not required.In addition, two couplings and an intermediate plate are combined after processing.Although there is no relative rotation, the driving shaft and the driven shaft run at the same speed, which makes it valuable.
In the structural design and series design of the cross slide coupling, based on the size of the transmission torque, the structure of the coupling and the strength of the hub, determine the range of the shaft hole of the coupling of each specification, and the long cross slide of the shaft hole The allowable speed range of the block coupling is determined by calculation according to the allowable linear speed and outer edge size of different materials of the coupling.
The important surface for the selection of the Oldham coupling is the rough reference, which requires sufficient margin for each processing surface to be guaranteed. The selection principle is introduced below.
1. The rough datum can only be used once in the same dimension direction.
2. Choose a relatively flat and smooth surface with a larger processing area as the rough reference.
3. Choose unprocessed surface as rough reference.
4. Select the surface with small machining allowance as the rough reference.
