This standard defines the terminology of coupling types, varieties and coupling technical parameters, and is applicable to mechanical couplings. GB/T 3931-1997 Coupling terminology GB/T3931-1997 Standard download decompression password: www.bzxz.net

GB/T3931—1997
This standard is a revision of GB3931--83, and is technically consistent with relevant standards such as GB12458-90 "Classification of Mechanical Couplings" and GB496985 "Terms and Terms of Universal Joints and Drive Shafts". When revising this standard, the basic content of GB3931-83 was retained, and relevant content in GB1245890 and GB4969-85, some new couplings, and relevant terms in "Coupling Selection Calculation" were added. Conceptual hierarchy classification is based on GB12458--90, and Appendix A: "Technical Parameters of Couplings" (supplement) in the original GB3931-83 is included in the text of this standard, and "Simplified Schematic Symbols of Couplings" are added to Appendix A (suggested Appendix) of this standard. This standard includes the following three units: Unit 1 "Terms of Coupling Categories and Varieties"; Unit 2 "Terms of Technical Parameters of Couplings"; Unit 3 Appendix A "Simplified Schematic Symbols of Couplings". This standard shall replace GB3931--83 from the date of entry into force. This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China and is under the jurisdiction of the National Technical Committee for Standardization of Machine Shafts and Accessories. The drafting units of this standard are: Machinery Standardization Research Institute of the Ministry of Machinery Industry, Tongji University, and Guizhou Metallurgical Transmission Machinery Factory. The main drafters of this standard are Zhou Mingheng, Lian Xiangjiao, Chen Zhulin, and Cheng Guogang. 24
1 Scope
National Standard of the People's Republic of China
Coupling
Coupling—Vocabulary
GB/T39311997
Replaces 393183
This standard defines the terms for the types, varieties and technical parameters of couplings, and is applicable to mechanical couplings (referred to as couplings) 2 Coupling coupling
A mechanical device that connects two shafts or a shaft and a rotating part, and rotates together without disengaging during the transmission of torque and motion. 3 Coupling categories and terminology
3.1 Rigid coupling
A coupling that cannot compensate for relative displacement between two shafts. 3.1.1 Flange coupling A coupling that uses bolts to connect the flanges of the two halves of the coupling to achieve the connection of the two shafts, see Figure 1. Figure 1
3.1.2 Flange coupling with radial key A coupling that uses radial keys and ordinary bolts to connect the two halves of the coupling, see Figure 2. Approved by the State Administration of Technical Supervision on July 25, 1997 and implemented on February 1, 1998
3.1.3 Sleeve coupling GB/T 3931—1997
A coupling that uses a common sleeve to connect two shafts in some way, see Figure 3.3.1.4 Split coupling Figure 3
A coupling that uses two axially split shells to clamp in some way to connect two shafts, see Figure 4.3.1.5 Parallel shaft coupling Figure 4
A coupling that uses an intermediate disk through a pin to connect two parallel shafts, see Figure 5. Figure 5
3.2 Flexible coupling flexible coupling A coupling that can compensate for the relative displacement of two shafts. GB/T3931-1997
3.2.1 Flexible coupling without elastic resilient component Flexible coupling without elastic resilient component 3.2.1.1 Universal coupling A coupling that allows torque to be transmitted at large angular displacements. 3.2.1.1.1 Universal coupling with spider Universal coupling with spider A universal coupling that uses a cross-axis intermediate piece to achieve the connection between two shafts of different axes, see Figure 6. Figure 6
3.2.1.1.2 Universal coupling with ball and socket A universal coupling that uses a number of steel balls placed in the inner and outer star wheel grooves that are connected to the two shafts respectively to achieve the connection between two shafts of different axes, see Figure 7.
3.2.1.1.3 Universal coupling with sphere articulation Universal coupling with sphere articulation A universal coupling that uses a sphere articulation intermediate piece to achieve the connection between two axes of different axes, see Figure 8. Figure 8
3.2.1.1.4 Piston universal coupling with sphere articulation A universal coupling that uses a sphere articulation and a plunger combination intermediate piece to achieve the connection between two axes of different axes, see Figure 9.27
GB/T3931:1997
3.2.1.1.5 Universal coupling with three fork rod Universal coupling with three fork rod A universal coupling that uses a flange fork rod and a column cold combination intermediate piece to achieve the connection between two axes of different axes, see Figure 10. Figure 10
3.2.1.1.6 Universal coupling with sphcre fork Universal coupling with sphcre fork A universal coupling that uses a number of steel balls placed in an intermediate piece composed of two spherical forks to achieve the connection between two shafts with different axes, see Figure 11.
3.2.1.1.7 Universal coupling with convex block Universal coupling with convex block A universal coupling that uses an intermediate piece composed of two convex forks and two intermediate concave blocks to achieve the connection between two shafts with different axes, see Figure 12.
GB/T3931—1997
3.2.1.1.8 Universal coupling with three sphere pin Universal coupling with three sphere pins A universal coupling that uses an intermediate piece connected to the housing and the shaft through three radially evenly distributed tripods equipped with ball rings in the same plane to achieve the connection between two shafts with different axes, see Figure 13. Figure 13
3.2.1.1.9 Universal coupling with three pin Universal coupling with three pin A universal coupling that uses an intermediate piece consisting of two three pins and two eccentric shaft forks to achieve the connection between two shafts of different axes, see Figure 14.
3.2.1.1.10 Universal coupling with sphere pin GB/T39311997
Universal coupling that uses an intermediate piece that connects the double column housing and the ball head shaft by a pin with ball rings on the shaft necks at both ends to achieve the connection between two shafts of different axes, see Figure 15. Figure 15
3.2.1.2 Gear coupling Gear coupling A coupling that uses internal and external teeth to mesh to achieve the connection between two half couplings, see Figure 16. Drum gear
3.2.1.3 Chain coupling Chain coupling uses a common chain to mesh with two parallel sprockets with the same number of teeth to achieve a coupling that connects the two half couplings. See Figure 17.
3.2.1.4 Slider coupling Oldham coupling Figure 17
Use the middle slider to slide in the corresponding radial grooves on the end faces of the half couplings on both sides to achieve a coupling that connects the two half couplings, see Figure 18.
GB/T3931—1997
3.2.1.5 Spherical roller coupling Sphere roller coupling Use spherical roller middle piece to achieve a coupling that connects the master and slave ends, see Figure 19. Figure 19Www.bzxZ.net
3.2.1.6 Ball coupling Ball coupling Use steel balls as middle pieces to achieve a coupling that connects the master and slave ends, see Figure 20. Figure 20
3.2.2 Resilient coupling Resilient coupling uses the elastic deformation of elastic elements to compensate for the relative displacement of the two shafts, mitigate impact and absorb vibration. 3.2.2.1 Resilient coupling with metallic elastic element Resilient coupling with metallic elastic element. 3.2.2.1.1. Freedom disc coupling: A coupling that uses spring laminations to connect the two coupling halves by bolts or other connection methods, see Figure 21. GB/T 3931—1997
3.2.2.1.2: Diaphragm coupling: A coupling that uses a single (multiple) elastic disc to connect the two coupling halves by bolts or other connection methods, see Figure 22. 3.2.2.1.3: Flat spring coupling: A coupling that uses a number of spring groups arranged in different ways to connect the two coupling halves, see Figure 23. Figure 23
3.2.2.1.4: Steel flex grid coupling: A coupling that uses a serpentine spring embedded in the teeth on the flanges of the two coupling halves to connect the two coupling halves, see Figure 24.
GB/T3931-1997
3.2.2.1.5 Resilient pole coupling A coupling that uses a number of rod-shaped springs through bolts to connect the two half couplings, see Figure 25. Figure 25
3.2.2.1.6 Screw spring coupling A coupling that uses a number of cylindrical spiral springs through cylindrical pins to connect the two half couplings, see Figure 26. Figure 26
GB/T3931—1997
3.2.2.1.7 Flat spring coupling with float shaft A coupling that uses an intermediate floating disk through a spring to connect the two half couplings, see Figure 27. Figure 27
3.2.2.1.8 Coiled spring coupling A coupling that uses a number of coil springs through an intermediate ring to connect the two halves of the coupling, see Figure 28. Figure 28
3.2.2.1.9 Corrugated pipe coupling A coupling that uses a bellows to weld or other connection methods to connect the two halves of the coupling, see Figure 29. Figure 29
3.2.2.1.10 Resilient tube coupling A coupling that uses an elastic tube to connect two shafts, see Figure 30.3.1
GB/T3931
3.2.2.1.11 Film coupling Film coupling 1997
A coupling that uses two sets of films fixed on the intermediate disk through a dial to connect the two shafts, see Figure 31. Figure 31
3.2.2.2 Resilient coupling with elastomer Resilient coupling with non-metallic elastic element. 3.2.2.2.1 Plum blossom-shaped resilient coupling Resilient coupling with elastic spider A coupling that uses a plum blossom-shaped elastic element and is placed between the two coupling halves to connect the two coupling halves, see Figure 32.
3.2.2.2.2 Pin coupling with sleeve elastomer A coupling that uses a pin with an elastic sleeve at the end and is installed in the flange hole of the two coupling halves to connect the two coupling halves, see Figure 33.
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