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Mechanical Industry Standard of the People's Republic of China
JB/T5901-1991
Cross-axis universal coupling
Published on December 25, 1991
Implementation by the Ministry of Machinery and Electronics Industry of the People's Republic of China on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Cross-axis universal coupling
JB/T5901-1991
This standard specifies the classification, technical requirements, inspection rules, marking, packaging and storage of cross-axis universal couplings (hereinafter referred to as couplings).
This standard is applicable to transmission shaft systems with an angle β≤45° between the axes of two shafts; single cross-axis universal couplings and double cross-axis universal couplings that transmit a nominal torque of 11.2~1120N-m. 2
Referenced Standards
GB 117
GB3078
GB3507
GB3852
GB3931
GB4879
GB6388
GB6543
GB12458
3.1 Type
Tapered pin
Cylindrical pin
Packaging, storage and transportation pictorial symbols
High-quality structural steel cold-drawn steel Technical conditions
Nominal torque series of mechanical couplings
Shaft hole and keyway type and size of couplings
Terminology of mechanical couplings
Rust-proof packaging
Transport packaging delivery and receipt marks
Corrugated paper box
Classification of mechanical couplings
The coupling structure is divided into:
Single cross shaft universal coupling (see Figure 1); double cross shaft universal coupling (see Figure 2). Coupling connection type at both ends
3. 1. 2. 1
The same hole shape is used at both ends:
Cylindrical hole (according to the provisions of GB3852);
Cylindrical hole with keyway (according to the provisions of GB3852); square hole shape (see Appendix B).
3. 1. 2. 2
Different hole shapes are used at both ends:
Cylindrical hole and cylindrical hole with keyway
Cylindrical hole and square hole:
Approved by the Ministry of Machinery and Electronics Industry on December 25, 1991 and implemented on July 1, 1992
Cylindrical hole with keyway and square hole.
3.2 Model indication method
The coupling model shall comply with the provisions of GB12458. WS
JB/T5901-1991
Specification code (as specified in Table 1)
Single cross-axis universal coupling is represented by D
Type code
Double cross-axis universal coupling is not represented
Cross-axis universal coupling code
Coupling model example:
Example 1: The model of the double cross-axis universal coupling with a nominal torque of 45N·m is: WS3Example 2: The model of the single cross-axis universal coupling with a nominal torque of 560N·m is: WSD73.3Marking
The coupling marking should comply with the provisions of GB12458. 3.3.1
The marking code for needle roller bearings is: G
The marking code for sliding bearings is: H
3.3.2 Coupling marking examples
3.3.2.1 Marking examples for couplings with the same hole shape at both endsExample 1: WS4 double cross-axis universal coupling, both ends are cylindrical holes. Active end: Y-type shaft hole, d=16mm, D=32mm: Driven end: J-type shaft hole, d=18mm, D=32mm. When needle bearings are used, the marking is:
WS4 coupling
JB/T 5901—91
Both ends are cylindrical holes with keyswwW.bzxz.Net
Example 2: WS4 double cross shaft universal coupling, C driving end: Y-type shaft hole, A-type keyway, d=18mm, D=32mm; driven end: Y-type shaft hole, A-type keyway, d=18mm, D=32mm. When sliding bearings are used, the marking is:
WS4 coupling 18x32 (H)
JB/T5901—91
Example 3: WS5 double cross shaft universal coupling, both ends are square holes driving end: s=19mm, D=40mm;
driven end: s=19mm, D=40mm.
The marking when using sliding bearings is:
WS5 coupling—s19x40 (H)
JB/T5901—91
2 Examples of markings with different hole shapes at both ends of the coupling 3. 3. 2. 2
Example 1: WS4 cross-axis universal coupling, using cylindrical and cylindrical holes with keyways. Active end: Y-type shaft hole, d=16mm,
D=32mm:
Driven end: Y-type shaft hole, A-type keyway, d=18mm, D=32mm. When needle roller bearings are used, the marking is:
×32 (G)
WS4 coupling
JB/T5901—91
JB/T5901-1991
Example 2: WS5 cross-axis universal coupling, with cylindrical and square hole shapes. Active end: Y-type shaft hole, d=20mm, D=40mm; driven end: s=19mm, D=40mm.
When sliding bearings are used, the marking is:
WS5 coupling 20
x40 (H)
JB/T5901—91
Example 3: WS3 cross-axis universal coupling, using cylindrical and square hole with keyway. Active end: Y-type shaft hole, A-type keyway, d=12mm, D=25mm; driven end: s=14mm, D=25mm.
When sliding bearings are used, the marking is:
WS3 coupling 2
x25 (H)
JB/T5901—91
3.4 Structural type, basic parameters and main dimensions 3.4.1 Single cross-axis universal coupling
Structural type, basic parameters and main dimensions shall comply with the provisions of Figure 1 and Table 1. Electric
Figure 1 WSD type single cross universal coupling
1, 2-half coupling: 3-taper pin: 4-cross shaft: 5-pin: 6-sleeve: 7-cylindrical pin 3.4.2 Double cross shaft universal coupling
The structural type, basic parameters and main dimensions shall comply with the provisions of Figure 2 and Table 1. Figure 2 WS type double cross shaft universal coupling
1, 3-half coupling: 2-fork joint: 4-cross shaft; 5-pin: 6-sleeve: 7-fixed column pin 3
Nominal torque
JB/T5901-1991
Basic parameters and main dimensions of WS and WSD type cross shaft universal couplingsTable 1
WSD type
Y typeJ type
Note: ①The coupling weight and rotation modulus in the table are approximate values. Y type J type
②When the axis angle B≠0, the permissible torque of the coupling [7]=T,cosβ. ③The intermediate shaft size L can be selected according to needs. 4 Technical requirements
4.1 The material properties of the coupling parts shall not be lower than those specified in Table 2. 4
WSD type
Moment of inertia
WSD type
Y type J type
Part name
Half coupling
Tapered pin
Cross shaft
Cylindrical pin
Fork joint
JB/T5901-1991
35 steel, 45 steel
40Cr, 40CrNi
Coupling parts material
Heat treatment
20CrMo, 20MnVB
35 steel, 45 steel
35 steel, 45 steel
35 steel, 45 steel
4.2 Half coupling, cross shaft, fork joint, sleeve, etc. shall not have defects such as cracks and pores. 4.3 Installation requirements
Standards to be met
GB3078
GB3078
GB3078
When installing a single cross-axis universal coupling, the angular velocities of the master and slave ends are not equal, and the master and slave shafts cannot maintain synchronous rotation. Their asynchronicity changes with the angle β.
To achieve equal angular velocity and synchronous rotation, a double cross-axis universal coupling should be installed or a combination of two single cross-axis universal couplings and an intermediate shaft should be used.
When installing two single cross-axis universal couplings, it must be noted that when the fork joint is connected to the intermediate shaft, its ends should be the same as in the double cross-axis universal coupling, so that the orientation of the symmetry plane of the fork of the fork clamps at both ends is consistent and maintained in the same plane, as shown in Figure 3a. If it is Figure 3b, it will be asynchronous rotation with unequal angular velocity. For the same reason, the angle β at both ends of the intermediate shaft must be the same size and in the same plane, see Figure
: When the position of the driven shaft relative to the driving shaft changes, the two shafts are only allowed to move parallel to each other, see Figure Positive
Net cycle identification
Fork joint fork position
a Positive item
b Positive edition
c Misreading
Figure 4 Angle
5 Inspection rules
JB/T5901-1991
Figure 5 Parallel movement
5.1 The coupling shall be inspected and accepted according to the drawings approved through the prescribed procedures and the requirements of Chapter 4 of this standard. 5.2 During mass production, the manufacturer and the user shall negotiate for random inspection. Marking, packaging, storage
6.1 Marking
The half coupling shall be printed with model marks according to the positions shown in Figures 2 and 3. The certificate of conformity of each set of couplings shall include: coupling model, standard number:
Manufacturer name:
Inspection pass mark;
Factory date:
Factory number.
6.2 Packaging
After cleaning, the coupling shall be packed for rust prevention in accordance with the provisions of GB4879. 6.2.1
#迎童商
The coupling after rust prevention packaging shall be placed in an outer packaging container, the size of which shall comply with the provisions of GB4892, and the package shall be tied tightly with plastic strapping tape or 6.2.2
packaging steel strapping. The outer packaging container may be a double corrugated paper box or an ordinary wooden box that complies with GB6543 or relevant ordinary wooden box standards.
6.2.3The marking on the outer packaging container of the coupling shall comply with the provisions of GB191 and GB6388. 6.3 The coupling should be stored in a dry environment, away from sunlight, rain, acid, alkali, organic solvents and other substances. 6
JB/T5901-1991
Appendix A
Instructions for the selection of couplings
(reference)
To ensure the equal angular speed of the rotational motion and the synchronous rotation between the driving and driven shafts, a double cross-axis universal coupling or two single cross-axis universal couplings should be used together, and the following three conditions should be met: a.
The angles between the intermediate shaft and the driving shaft and the driven shaft are equal, that is, β=β: The symmetry planes of the forks at both ends of the intermediate shaft are in the same plane: b.
The three axes of the intermediate shaft, the driving shaft and the driven shaft are in the same plane, see Figure A1. Active contact
A2 Load capacity
Medium-wide transmission
Driven shaft
Figure A1 Schematic diagram of the active and driven ends in the same planeA2.1 Cross-axis universal coupling using sliding bearingsThe power curve of the cross-axis universal coupling using sliding bearings is shown in Figure A2. It can be concluded from Figure A2 that when the angle β is 10°, the power and torque that can be transmitted by the single cross-axis universal coupling in long-term use are related to the speed.
When the angle is greater than 10°, the correction factor II must be selected according to Figure A3. At this time, the transmitted power P must be divided by the correction factor n, and the result is:
Where: p/-
Corrected power, kW
—Transmitted power, kW;
7—Correction factor.
If the β value is between 0 and 5°, the correction factor ^ obtained from Figure A3 can increase P' by 25%. If it is between 5° and 10°, it can be obtained by interpolation in the linear region.
The power that can be transmitted by a double cross-axis universal coupling is only 90% of the correction value of a single cross-axis universal coupling. In extreme and special cases, the data shall be determined by the manufacturer. 7
Fu Wang Cheng
JB/T5901-1991
Type of speed year
Power curve when using sliding bearings
1600t/mir
Figure A3Correction coefficient curve when using sliding bearings A2.2The curve of the correction coefficient n of the cross-axis universal coupling using needle roller bearings is shown in Figure A5.
For the power curve of the cross shaft universal coupling using needle bearings, see Figure A4, T\=Tn,n
Where: T
Corrected torque;
T—Transmitted torque:
7. ——Impact coefficient (1~3).
（A2）
A2.3 Selection example:
2025x3
2 ×25
JB/T590/-1991
13960193x19
Life x speed
Power curve when using needle roller bearings
Nose clip
Figure A5 Curve diagram of correction factor n when using needle roller bearings a. Given: transmitted power P = 1.5kW
Speed n = 250r/min
Angle B
Steps: From the figure
corrected power p
it is obtained =
JB/T 5901-1991
According to Figure A2, the WSD7 single cross shaft universal coupling 32×60 with a speed of 250r/min and 3.3kW is suitable, and its allowable torque is: [T]=128N·m, and WSD7-35X60. Known: Transmitted torque T = 70N·m
Speed n = 1400r/min
Angle β = 20°
Life: 500h
Impact coefficient n =
Correction coefficient 7 =
Correction torque T\ = Tn = 70x1.1×1.5 = 116N-mLife×speed = 500×1400=700000=70×104According to Figure 4, the suitable cross-axis universal coupling is WS7-32×60 (G) or WS7-35×60 (G). Appendix
The coupling shaft is a square hole shape
(reference part)
B1 The square hole shape is shown in Figure B1, and the main dimensions are in accordance with the provisions of Table B1. Figure B1
Additional Notes:
Square hole
Main dimensions of square hole
This standard was proposed by the Ministry of Machinery and Electronics Industry and is under the jurisdiction of the Mechanical Standardization Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Mechanical Standardization Institute of the Ministry of Machinery and Electronics Industry and Tongji University. The main drafters of this standard are Zhou Mingheng, Yu Huaizheng and Tian Zheng. 103 The coupling should be stored in a dry environment, avoid sunlight, rain, and avoid contact with acids, alkalis, organic solvents and other substances. 6
JB/T5901-1991
Appendix A
Instructions for the selection of couplings
(reference)
To ensure the equal angular speed of the rotational motion and the synchronous rotation between the driving and driven shafts, a double cross-axis universal coupling or two single cross-axis universal couplings should be used together, and the following three conditions should be met: a.
The angles between the intermediate shaft and the driving shaft and the driven shaft are equal, that is, β=β: The symmetry planes of the forks at both ends of the intermediate shaft are in the same plane: b.
The three axes of the intermediate shaft, the driving shaft and the driven shaft are in the same plane, see Figure A1. Active contact
A2 Load capacity
Medium-wide transmission
Driven shaft
Figure A1 Schematic diagram of the active and driven ends in the same planeA2.1 Cross-axis universal coupling using sliding bearingsThe power curve of the cross-axis universal coupling using sliding bearings is shown in Figure A2. It can be concluded from Figure A2 that when the angle β is 10°, the power and torque that can be transmitted by the single cross-axis universal coupling in long-term use are related to the speed.
When the angle is greater than 10°, the correction factor II must be selected according to Figure A3. At this time, the transmitted power P must be divided by the correction factor n, and the result is:
Where: p/-
Corrected power, kW
—Transmitted power, kW;
7—Correction factor.
If the β value is between 0 and 5°, the correction factor ^ obtained from Figure A3 can increase P' by 25%. If it is between 5° and 10°, it can be obtained by interpolation in the linear region.
The power that can be transmitted by a double cross-axis universal coupling is only 90% of the correction value of a single cross-axis universal coupling. In extreme and special cases, the data shall be determined by the manufacturer. 7
Fu Wang Cheng
JB/T5901-1991
Type of speed year
Power curve when using sliding bearings
1600t/mir
Figure A3Correction coefficient curve when using sliding bearings A2.2The curve of the correction coefficient n of the cross-axis universal coupling using needle roller bearings is shown in Figure A5.
For the power curve of the cross shaft universal coupling using needle bearings, see Figure A4, T\=Tn,n
Where: T
Corrected torque;
T—Transmitted torque:
7. ——Impact coefficient (1~3).
（A2）
A2.3 Selection example:
2025x3
2 ×25
JB/T590/-1991
13960193x19
Life x speed
Power curve when using needle roller bearings
Nose clip
Figure A5 Curve diagram of correction factor n when using needle roller bearings a. Given: transmitted power P = 1.5kW
Speed n = 250r/min
Angle B
Steps: From the figure
corrected power p
it is obtained =
JB/T 5901-1991
According to Figure A2, the WSD7 single cross shaft universal coupling 32×60 with a speed of 250r/min and 3.3kW is suitable, and its allowable torque is: [T]=128N·m, and WSD7-35X60. Known: Transmitted torque T = 70N·m
Speed n = 1400r/min
Angle β = 20°
Life: 500h
Impact coefficient n =
Correction coefficient 7 =
Correction torque T\ = Tn = 70x1.1×1.5 = 116N-mLife×speed = 500×1400=700000=70×104According to Figure 4, the suitable cross-axis universal coupling is WS7-32×60 (G) or WS7-35×60 (G). Appendix
The coupling shaft is a square hole shape
(reference part)
B1 The square hole shape is shown in Figure B1, and the main dimensions are in accordance with the provisions of Table B1. Figure B1
Additional Notes:
Square hole
Main dimensions of square hole
This standard was proposed by the Ministry of Machinery and Electronics Industry and is under the jurisdiction of the Mechanical Standardization Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Mechanical Standardization Institute of the Ministry of Machinery and Electronics Industry and Tongji University. The main drafters of this standard are Zhou Mingheng, Yu Huaizheng and Tian Zheng. 103 The coupling should be stored in a dry environment, avoid sunlight, rain, and avoid contact with acids, alkalis, organic solvents and other substances. 6
JB/T5901-1991
Appendix A
Instructions for the selection of couplings
(reference)
To ensure the equal angular speed of the rotational motion and the synchronous rotation between the driving and driven shafts, a double cross-axis universal coupling or two single cross-axis universal couplings should be used together, and the following three conditions should be met: a.
The angles between the intermediate shaft and the driving shaft and the driven shaft are equal, that is, β=β: The symmetry planes of the forks at both ends of the intermediate shaft are in the same plane: b.
The three axes of the intermediate shaft, the driving shaft and the driven shaft are in the same plane, see Figure A1. Active contact
A2 Load capacity
Medium-wide transmission
Driven shaft
Figure A1 Schematic diagram of the active and driven ends in the same planeA2.1 Cross-axis universal coupling using sliding bearingsThe power curve of the cross-axis universal coupling using sliding bearings is shown in Figure A2. It can be concluded from Figure A2 that when the angle β is 10°, the power and torque that can be transmitted by the single cross-axis universal coupling in long-term use are related to the speed.
When the angle is greater than 10°, the correction factor II must be selected according to Figure A3. At this time, the transmitted power P must be divided by the correction factor n, and the result is:
Where: p/-
Corrected power, kW
—Transmitted power, kW;
7—Correction factor.
If the β value is between 0 and 5°, the correction factor ^ obtained from Figure A3 can increase P' by 25%. If it is between 5° and 10°, it can be obtained by interpolation in the linear region.
The power that can be transmitted by a double cross-axis universal coupling is only 90% of the correction value of a single cross-axis universal coupling. In extreme and special cases, the data shall be determined by the manufacturer. 7
Fu Wang Cheng
JB/T5901-1991
Type of speed year
Power curve when using sliding bearings
1600t/mir
Figure A3Correction coefficient curve when using sliding bearings A2.2The curve of the correction coefficient n of the cross-axis universal coupling using needle roller bearings is shown in Figure A5.
For the power curve of the cross shaft universal coupling using needle bearings, see Figure A4, T\=Tn,n
Where: T
Corrected torque;
T—Transmitted torque:
7. ——Impact coefficient (1~3).
（A2）
A2.3 Selection example:
2025x3
2 ×25
JB/T590/-1991
13960193x19
Life x speed
Power curve when using needle roller bearings
Nose clip
Figure A5 Curve diagram of correction factor n when using needle roller bearings a. Given: transmitted power P = 1.5kW
Speed n = 250r/min
Angle B
Steps: From the figure
corrected power p
it is obtained =
JB/T 5901-1991
According to Figure A2, the WSD7 single cross shaft universal coupling 32×60 with a speed of 250r/min and 3.3kW is suitable, and its allowable torque is: [T]=128N·m, and WSD7-35X60. Known: Transmitted torque T = 70N·m
Speed n = 1400r/min
Angle β = 20°
Life: 500h
Impact coefficient n =
Correction coefficient 7 =
Correction torque T\ = Tn = 70x1.1×1.5 = 116N-mLife×speed = 500×1400=700000=70×104According to Figure 4, the suitable cross-axis universal coupling is WS7-32×60 (G) or WS7-35×60 (G). Appendix
The coupling shaft is a square hole shape
(reference part)
B1 The square hole shape is shown in Figure B1, and the main dimensions are in accordance with the provisions of Table B1. Figure B1
Additional Notes:
Square hole
Main dimensions of square hole
This standard was proposed by the Ministry of Machinery and Electronics Industry and is under the jurisdiction of the Mechanical Standardization Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Mechanical Standardization Institute of the Ministry of Machinery and Electronics Industry and Tongji University. The main drafters of this standard are Zhou Mingheng, Yu Huaizheng and Tian Zheng. 105=116N-mLife×speed=500×1400=700000=70×104According to Figure 4, the suitable cross shaft universal coupling is WS7-32×60 (G) or WS7-35×60 (G). Appendix
The coupling connecting shaft is a square hole shape
(reference part)
B1The square hole shape is shown in Figure B1, and the main dimensions are in accordance with the provisions of Table B1. Figure B1
Additional notes:
Square hole shape
Main dimensions of square hole shape
This standard was proposed by the Ministry of Machinery and Electronics Industry and is under the jurisdiction of the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry and Tongji University. The main drafters of this standard are Zhou Mingheng, Yu Huaizheng and Tian Zheng. 105=116N-mLife×speed=500×1400=700000=70×104According to Figure 4, the suitable cross shaft universal coupling is WS7-32×60 (G) or WS7-35×60 (G). Appendix
The coupling connecting shaft is a square hole shape
(reference part)
B1The square hole shape is shown in Figure B1, and the main dimensions are in accordance with the provisions of Table B1. Figure B1
Additional notes:
Square hole shape
Main dimensions of square hole shape
This standard was proposed by the Ministry of Machinery and Electronics Industry and is under the jurisdiction of the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry and Tongji University. The main drafters of this standard are Zhou Mingheng, Yu Huaizheng and Tian Zheng. 10
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