Ever-Power Co., Ltd.
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What parts materials are needed for the Oldham coupling
The cross slide coupling is also known as the metal slide coupling. Its slide block is circular and made of steel or anti-wear alloy. It is suitable for transmission cross slide couplings with low speed and large transmission torque. The device consists of two half-couplings with grooves on the end faces and a middle disc with protruding 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 material of this coupling part can be 45 steel, and the working surface needs to be heat treated to increase its hardness; Q275 steel can also be used when the requirements are lower, without heat treatment.In order to reduce friction and wear, lubrication should be injected from the oil hole of the middle plate when in use.Because the half-coupling and the intermediate disc form a moving pair and cannot rotate relative to each other, the angular velocity of the driving shaft and the driven shaft should be equal.However, when working with relative displacement between the two shafts, the middle disk will generate a large centrifugal force, which will increase the dynamic load and wear.Therefore, pay attention to the working speed not greater than the specified value when selecting.This kind of coupling is generally used at a rotation speed n<250r/min, where the shaft stiffness is relatively large and there is no severe impact.
The material of the sliding block coupling parts can be 45 steel, and the working surface needs to be heat treated to improve its hardness; Q275 steel can also be used when the requirements are low, without heat treatment.In order to reduce friction and wear, lubrication should be injected from the oil hole of the middle plate when in use.Because the half-coupling and the intermediate disc form a moving pair and cannot rotate relative to each other, the angular velocity of the driving shaft and the driven shaft should be equal.However, when working with relative displacement between the two shafts, the middle disk will generate a large centrifugal force, which will increase the dynamic load and wear.Therefore, pay attention to the working speed not greater than the specified value when selecting.This kind of coupling is generally used at a rotation speed n<250r/min, where the shaft has greater rigidity and no severe impact.
The central sliding block is connected with the shaft sleeves on both sides by 90° oppositely distributed clamping grooves on both sides, so as to achieve the purpose of transmitting torque.The center sliding block and the shaft sleeve are matched with a slight pressure, which enables the coupling to run with zero clearance during the operation of the equipment.As the use time increases, the slider may lose its recoilless function due to wear, but the center slider is not expensive, and it is easy to replace, and it can still play its original performance after replacement.Slider couplings are often used in common motors. In some cases, they can also be used to connect servo motors. The relative displacement can be corrected by the sliding of the center slider during use.Because the resistance to the relative displacement is the friction between the slider and the sleeve, the bearing load between them will not increase due to the increase in the relative displacement.
Unlike other couplings, the slider coupling does not have an elastic element that can work like a spring, so it will not increase the bearing load due to the increase in the relative displacement between the shafts.In any case, this series of couplings are more worthwhile, and the ability to choose sliders of different materials is the advantage of this coupling.Our company can provide a variety of raw material center sliders to adapt to different applications according to the specific requirements of customers.Generally speaking, one type of material is suitable for zero-clearance, high-torque rigidity and high-torque situations, and the other type of material is suitable for low-precision positioning, without zero-clearance, but has the functions of absorbing vibration and reducing noise.The non-metallic slider also has good electrical insulation and can be used as a mechanical fuse.When the engineering plastic slider is damaged, the transmission effect will be terminated, so as to protect the valuable mechanical parts.This design is suitable for large parallel relative displacements.The three-part design of the slider coupling split body, which has the ability to compensate for the axial deviation, for example, cannot be used in push-pull applications.At the same time, because the center slider is floating, the two-axis movement ensures that the slider will not fall off.
The slider of the slider coupling uses nylon square blocks as the elastic body, and the middle slider is used to slide in the corresponding radial grooves on the end faces of the half couplings on both sides to realize the coupling of the two halves.This coupling has high noise, low speed and fast wear. Generally, it is not used as much as possible. Only in the occasions with very low speed. The slider coupling specified in this standard is suitable for oil pump devices or other occasions with small transmission torque. Compensate the relative offset of the two axes, shock absorption and cushioning performance; its working temperature is -20~70°C.The nominal torque transmitted is 16~500N.m.Allowable compensation: axial △x=1~2mm, radial △y≤0.2mm, angular △α≤40'.
The conical shaft sleeve hole is easy to obtain the concentricity between the mating parts, the contact between the coupling and the shaft mating surface can achieve a better fit, and the inspection is also more convenient, so the use of conical holes is more common.The semi-couplings are generally made of forgings, leaving a margin of 2-3mm on each side during rough machining, and the boring process can only be carried out after heat treatment to eliminate residual stress.The boring of the coupling is usually carried out on a lathe, because the machining degree of the coupling sleeve hole is very high, so the finishing of the hole is usually done by grinding.The finish machining of the outer surface of the coupling is carried out in the same clamping as the boring.The size of the processed hole and the contact between the hole and the shaft mating surface need to be inspected. For mass-produced couplings, generally taper sample columns can be used to ensure the interchangeability of parts.Single-piece couplings can be inspected by fitting the coupling on the shaft end.If the fit between the shaft and the hole does not meet the requirements, the hole of the coupling can be repaired.
The material of the sliding block coupling parts can be 45 steel, and the working surface needs to be heat treated to improve its hardness; Q275 steel can also be used when the requirements are low, without heat treatment.In order to reduce friction and wear, lubrication should be injected from the oil hole of the middle plate when in use.Because the half-coupling and the intermediate disc form a moving pair and cannot rotate relative to each other, the angular velocity of the driving shaft and the driven shaft should be equal.However, when working with relative displacement between the two shafts, the middle disk will generate a large centrifugal force, which will increase the dynamic load and wear.Therefore, pay attention to the working speed not greater than the specified value when selecting.This kind of coupling is generally used at a rotation speed n<250r/min, where the shaft has greater rigidity and no severe impact.
The central sliding block is connected with the shaft sleeves on both sides by 90° oppositely distributed clamping grooves on both sides, so as to achieve the purpose of transmitting torque.The center sliding block and the shaft sleeve are matched with a slight pressure, which enables the coupling to run with zero clearance during the operation of the equipment.As the use time increases, the slider may lose its recoilless function due to wear, but the center slider is not expensive, and it is easy to replace, and it can still play its original performance after replacement.Slider couplings are often used in common motors. In some cases, they can also be used to connect servo motors. The relative displacement can be corrected by the sliding of the center slider during use.Because the resistance to the relative displacement is the friction between the slider and the sleeve, the bearing load between them will not increase due to the increase in the relative displacement.
Unlike other couplings, the slider coupling does not have an elastic element that can work like a spring, so it will not increase the bearing load due to the increase in the relative displacement between the shafts.In any case, this series of couplings are more worthwhile, and the ability to choose sliders of different materials is the advantage of this coupling.Our company can provide a variety of raw material center sliders to adapt to different applications according to the specific requirements of customers.Generally speaking, one type of material is suitable for zero-clearance, high-torque rigidity and high-torque situations, and the other type of material is suitable for low-precision positioning, without zero-clearance, but has the functions of absorbing vibration and reducing noise.The non-metallic slider also has good electrical insulation and can be used as a mechanical fuse.When the engineering plastic slider is damaged, the transmission effect will be terminated, so as to protect the valuable mechanical parts.This design is suitable for large parallel relative displacements.The three-part design of the slider coupling split body, which has the ability to compensate for the axial deviation, for example, cannot be used in push-pull applications.At the same time, because the center slider is floating, the two-axis movement ensures that the slider will not fall off.
The slider of the slider coupling uses nylon square blocks as the elastic body, and the middle slider is used to slide in the corresponding radial grooves on the end faces of the half couplings on both sides to realize the coupling of the two halves.This coupling has high noise, low speed and fast wear. Generally, it is not used as much as possible. Only in the occasions with very low speed. The slider coupling specified in this standard is suitable for oil pump devices or other occasions with small transmission torque. Compensate the relative offset of the two axes, shock absorption and cushioning performance; its working temperature is -20~70°C.The nominal torque transmitted is 16~500N.m.Allowable compensation: axial △x=1~2mm, radial △y≤0.2mm, angular △α≤40'.
The conical shaft sleeve hole is easy to obtain the concentricity between the mating parts, the contact between the coupling and the shaft mating surface can achieve a better fit, and the inspection is also more convenient, so the use of conical holes is more common.The semi-couplings are generally made of forgings, leaving a margin of 2-3mm on each side during rough machining, and the boring process can only be carried out after heat treatment to eliminate residual stress.The boring of the coupling is usually carried out on a lathe, because the machining degree of the coupling sleeve hole is very high, so the finishing of the hole is usually done by grinding.The finish machining of the outer surface of the coupling is carried out in the same clamping as the boring.The size of the processed hole and the contact between the hole and the shaft mating surface need to be inspected. For mass-produced couplings, generally taper sample columns can be used to ensure the interchangeability of parts.Single-piece couplings can be inspected by fitting the coupling on the shaft end.If the fit between the shaft and the hole does not meet the requirements, the hole of the coupling can be repaired.
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