What requirements should the shaft hole tolerance of the elastic pin coupling meet?

The elastic pin coupling is suitable for all kinds of transmission shafts that mechanically connect two coaxial lines, and is usually used for frequent high and low speed movements.The working temperature is -20～+80℃; the nominal torque of transmission is 40～20000N.m.A number of pins made of non-metal elastic materials are placed in the flange holes of the two halves of the coupling, and the two halves of the coupling are connected by the pins. The coupling has a simple structure and is easy to manufacture, assembling and disassembling the elastic elements It is more convenient, no need to move the two halves of the coupling.The material of the elastic element (column pin) is generally nylon, which has the ability to compensate the deviation of the two axes in a small amount. The elastic part is sheared when working, and the workability is relatively poor. It is only suitable for the medium-speed transmission shaft system with very low requirements. For working conditions with high workability requirements.The coupling can also compensate for the offset (including axial offset, radial offset, angular offset or comprehensive offset) between the two shafts due to deformation or thermal expansion when manufacturing and installation are not working; and Alleviate impact and absorb vibration.Most of the commonly used couplings have been standardized or standardized. Under normal circumstances, it is only necessary to correctly select the type of coupling and determine the type and size of the coupling.When necessary, the load capacity of the vulnerable links can be checked and calculated; when the speed is high, the centrifugal force of the outer edge and the deformation of the elastic element need to be checked, and the balance check and so on are required.

The elastic pin coupling has a relatively large structure, simple and reasonable, easy maintenance, symmetrical and interchangeable on both sides, long life, and allows greater axial movement.The shaft hole types are cylindrical (Y), conical (Z) and short cylindrical (J).The semi-coupling is made of casting, cast iron HT20-40, cast steel ZG35Ⅱ, the shaft hole and keyway are made of drawing, and the pin is made of MC nylon b.Because the product needs to withstand high temperature, the high temperature part is composed of two parts, a refractory layer (completed when the product is made).All can meet the needs of users for products to withstand high temperatures and product life.We can also produce horizontal and angular high temperature corrugated axial compensators with large compensation amount for users to choose from.

XNUMX. What methods can be used to fix the elastic pin coupling?

1. Semi-separable type: One side of this type is a clamping type bushing, and the other side is a separate type bushing. First fix one side of the shaft to the clamping type shaft sleeve, and then install the shaft center at the device end. In the separable bushing.

2. Separation type: The characteristic of the separation type is that it has a separate shaft sleeve, which can be fixed and disassembled without moving the device.

3. Keyway type: This type is the same as the fastening bolt type. It is an old-fashioned fixing method, suitable for higher torque transmission. To prevent axial movement, it is usually used together with the fastening bolt type and the clamping type.

4. Clamping type: Use the tightening force of countersunk bolts to shrink the slit and clamp the shaft tightly.It is convenient to fix and disassemble, and will not damage the axis of Qiancheng.

5. Fastening bolt type: This low-cost type is an old-fashioned fixing method.However, the front end of the bolt is in direct contact with the end center, which may cause damage to the shaft or difficulty in disassembly.

XNUMX. What requirements should the shaft hole tolerance of the elastic pin coupling meet?

（1）一般标准在0-3丝之内为标准公差，如何客户要求热装的话，可以将轴孔加工到0--3丝。

(2) Coupling shaft hole fit tolerance: fit tolerance refers to the sum of the hole and shaft tolerances that make up the fit.It is the amount of variation that allows clearance or interference.The tolerance zone size and tolerance zone position of the hole and shaft constitute the fit tolerance.

(3) The size of hole and shaft fit tolerance indicates the fit accuracy of hole and shaft.The size and position of the tolerance zone of the hole and shaft fit indicate the accuracy and nature of the fit between the hole and the shaft.The size of the fit tolerance = the size of the tolerance zone; the size and position of the fit tolerance zone = the nature of the fit.

（4）当轴承内径公差带与轴公差带构成配合时，在一般基孔制属过渡配合的公差代号将变为过盈配合，如k5、k6、m5、m6、n6等，但过盈量不大；当轴承内径公差代与h5、h6、g5、g6等构成配合时，不在是间隙而成为过盈配合。

(5) Because the tolerance value of the bearing outer diameter tolerance zone is different from the general reference shaft, it is also a special tolerance zone. In most cases, the outer ring is fixed in the housing hole, and some bearing components require adjustment. The coordination should not be too tight, and it is often matched with H6, H7, J6, J7, Js6, Js7, etc.