Improved design of miniature pin coupling?

A kind of miniature pin coupling.The scale of application of this kind of product is very wide, and its demand is also very large. Many people need to buy couplings, and they all hope to buy high-quality couplings.So, what improvements have been made to the demand for miniature pin couplings? Let's take a look at them together.

Coupling protection and the function of miniature pin coupling

It is difficult to adjust the alignment of the two shafts of the couplings of large machinery and equipment, and the couplings that are durable and convenient to replace the wearing parts should be selected.Miniature pin couplings with metal elastic elements generally have a longer service life than those with non-metal elastic elements.Couplings that need to be sealed smoothly and are not durable in use must be added to protect the workload.Regarding the occasions of long-term continuous operation and high economic benefits, such as the high end of the transmission system of the rolling mill of my country's metallurgical enterprises, gear couplings are now widely used. Although the gear couplings theoretically transmit large torque, they must be Durable work can only be done under the conditions of smoothness and excellent sealing, and it is necessary to frequently check the sealing condition of the coupling, inject smooth oil, and protect the gear coupling with a large amount of work. The auxiliary work hours are added, which reduces the useful work time and affects the production efficiency.The outer dimensions of the coupling are the radial and axial dimensions, and the coupling must be within the installation space permitted by the machinery and equipment.Choose a coupling that is convenient for assembly and disassembly, does not need to be protected, has a long protection period or is convenient for protection, replaces wearing parts without having to move the two shafts, and is simple to adjust the centering.The allowable speed scale of the coupling is determined by calculation based on the outer edge scale of the linear speed permitted by different data of the coupling.Different materials, types, and standard coupling allowable speed scales are different. Changing the coupling data can increase the allowable speed scale of the coupling. The allowable speed for steel is greater than the allowable speed for cast iron.The function of the miniature pin coupling Among the couplings, only the miniature pin coupling has the function of compensating the relative displacement of the two shafts. Therefore, many miniature pin couplings are selected in practical use.Rigid couplings are not compensatory and the scale of use is limited, so the amount is very small.Universal couplings should be used for shafting transmissions with large angular displacement; for shafting transmissions with axial movement and need to control axial displacement, diaphragm couplings should be used; as long as the alignment accuracy is high Rigid coupling is selected only below.Under normal circumstances, the relative displacement of the two shafts of the coupling is unavoidable. However, the direction of the balance displacement, the axial, radial angular direction, and the magnitude of the displacement of the shafting transmission under different working conditions are different.The two shafts connected by the coupling have relative displacement due to various factors such as manufacturing error, device error, device error, shaft load and deformation, base deformation, bearing wear, temperature change, and relative movement between components.

Improvement plan for miniature pin coupling

There is no detailed reference about the basic parameters and primary dimensions of the coupling with the shaft hole diameter ≦ 12mm.The basic parameters and dimensions of the elastic pin coupling are mainly regulated for the shaft hole diameter ≧ 12mm.

There is no detailed reference about the basic parameters and primary dimensions of the coupling with the shaft hole diameter ≦ 12mm.The basic parameters and dimensions of the elastic pin coupling are mainly regulated for the shaft hole diameter ≧ 12mm.In practice, couplings with a shaft hole diameter of less than 12mm are sometimes used, which requires us to plan for non-standard couplings.A small elastic pin coupling is used to connect the motor and the output shaft. The original structure sometimes forms the load transfer time effect of the motor. We analyzed the detailed reasons and made a re-planning of the half coupling structure of the motor coupling failure. .

1 The structure and principle before the improvement The connection status of the motor and the coupling before the improvement is: the cooperation part of the motor and the half coupling 4 is 6mm, the length is 32mm, there is no keyway on the shaft, and the key connection cannot be completed to transmit torque. According to the motor According to the device requirements, between the motor and the half-coupling hole selection transition cooperation, the torque is mainly transmitted by two M5 set screws fixed on the half-coupling. In the process of use, this structure has the following deficiencies: (1 ) There is a line surface touch between the motor shaft and the set screw, the touch surface is very small, and the transmission torque is very limited. (2) The threaded connection does not have the function of preventing loosening. After several times of disassembly and long-term operation, the relative rolling and axial movement of the half coupling shaft and the motor shaft will be formed, making the equipment unable to operate. 2 Improved structure and operating principle In view of the above situation, we have improved the structure of the half coupling. First, the half coupling 4 is processed into a product, and then the position of the machine tool along the center of the shaft diameter is cut with a line. Divided into two parts, the main part is the half coupling body and the attachment is the locking block. The main part of the rear half coupling is improved away from the motor end, and the inner hole is intact, ensuring the coaxiality requirements of the motor shaft, motor shaft, main body and lock The tightening block is connected together by the hexagon socket screw and the spring washer. Because the locking block half coupling is cut after processing the product, it will not affect the coaxiality requirements of the main body of the half coupling and the motor after assembling.With this structure, the original line and surface touch in the torque transmission part becomes the surface and surface touch, and the length of the touch along the axial direction increases, which in turn increases the touch area of ​​the motor and the coupling, and can also transmit large When the torque is applied, the spring washer between the hexagon socket screw and the locking block has an anti-loosening effect. When the coupling rotates at a high speed, the hexagon socket screw will not loosen.The coupling with this structure can be used to verify the torque transmission well. In other small coupling structures, this structure can also achieve many good effects.

The above is part of the content of the miniature pin coupling. For more information, please pay attention to the official website!