Some standard content:
ICS43.160
Machinery Industry Standard of the People's Republic of China
JB/T8582.4—2001
Agricultural Vehicle
Steering Gear
Agricultural VehicleSteeringgear2001-06-04Promulgated
China Machinery Industry Federation
2001-10-01Implementation
JB/T85824—2001
This standard is formulated to improve the product quality of agricultural vehicles, standardize the technical requirements and test methods of their steering gear assemblies, and ensure the interests of users and enterprises.
Appendix A of this standard is a reminder appendix
This standard is proposed and managed by the National Technical Committee for Standardization of Agricultural Vehicles. The drafting unit of this standard: Hunan University.
The main drafter of this standard: Lin Jinmu.
This standard was first issued in June 2001. bzxZ.net
1 Scope
Machinery Industry Standard of the People's Republic of China
Steering gear
Agricultural vehicle Steering gear JB/T8582.4—2001
This standard specifies the technical conditions, test methods, inspection rules, marking, packaging, transportation and storage of steering gear assemblies for agricultural transport vehicles (excluding steering shaft and steering column assembly, steering shaft universal joint fork assembly and horizontal and vertical tie rod assembly). This standard applies to steering gear assemblies for agricultural transport vehicles such as worm roller type, recirculating ball type, worm pin type and gear rack type. This standard does not apply to power steering gears.
2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are all valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T28281987 Sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches) JB/T5673—1991
3 Definitions
General technical conditions for painting agricultural and forestry tractors and implements This standard adopts the following definitions.
3.1 Rated output torque (force) ratedoutputtorque(orforce) The output torque (force) specified for safe use when the steering gear is designed. 3.2 Linear transmission ratio ILkdisplacement-angleratiofortherackandpinionstearinggear The ratio of the rack displacement increment to the gear rotation angle increment of a rack and pinion steering gear. 3.3 Total numbaofrotatingangleshesteringshaft The total rotation angle of the steering gear shaft (input shaft or rocker arm shaft) when it rotates from one extreme position to another. 4 Technical requirements
The steering gear shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 4.1 Performance
The transmission efficiency shall comply with the requirements of Table 1, and the mean square error of the positive efficiency shall not exceed 3% 4.1.1
Structural type
Worm roller type
Circulating ball type
Worm pin type
Rack and pinion type
Positive efficiency 7
≥70%
≥75%
Note: The values in the table are the average values within 60% of the full rotation angle. Approved by China Machinery Industry Federation on June 4, 2001 Reverse efficiency n
≥45%
≥ 50%
≥ 60%
2001-10-01Implementation
JB/T8582.42001
4.1.2 The transmission ratio and the full rotation angle of the input shaft shall comply with the requirements of the instruction manual and/or product drawings. 4.1.3 The transmission clearance characteristics of the steering gear within the full rotation angle range of the input shaft shall comply with the requirements of the instruction manual and/or product drawings. 4.1.4 The torque of the input shaft at the middle position shall comply with the requirements of the instruction manual and/or product drawings. 4.1.5 The small turning angle torsional stiffness G of the steering gear in the middle position shall not be less than 25N·m/rad, and the large turning angle torsional stiffness G shall not be less than 32N·m/rad: for the steering gear with the steering shaft welded, G shall not be less than 20N·m/rad, G shall not be less than 27N·m/rad4.2 Static torsional strength
4.2.1 The worm roller type, recirculating ball type and worm pin type steering gear shall be able to withstand the torsional load calculated by formula (1) without damage. M=27S
Where: M—
static torque value, N·m;
Tsteering gear rated output torque, N·m:
—angular transmission ratio;
—safety factor, take 3.
4.2.2 The rack and pinion type steering gear shall be able to withstand the torsional load calculated by formula (2) without damage. M-2FRS
Where: M-static torque value, N·m;
Fsteering gear rated output force, N;
Rgear pitch circle radius, m;
S-safety factor, take 3.
4.3Impact strength
After the steering gear is subjected to the drop hammer impact test as specified in Table 2, no cracks, distortion or inflexible rotation shall occur. Table 2
Rated output torque
Drop hammer mass
Drop height
4.4Fatigue life
≤580
>580-920
>920-1150
4.4.1The load on the steering rocker arm shaft of worm roller type, recirculating ball type and worm pin type steering gear is the rated output torque. After the drive input shaft has been subjected to a 1.5×105 cycle fatigue life test, or after the drive steering rocker arm shaft has been subjected to a 2×10 cycle fatigue life test, the parts should not be damaged (including pitting and peeling), and the clearance should be within the adjustable range. 4.4.2 The load borne on the rack shaft of the rack and pinion steering gear is the rated output force. After the drive input shaft has been subjected to a 1.5X105 cycle fatigue life test, or after the drive rack has been subjected to a 2×10 cycle fatigue life test, the parts should not be damaged (including pitting and peeling), and the clearance should be within the adjustable range.
4.5 Rotational flexibility
The steering gear should rotate flexibly without blocking. 4.6 Sealing
The steering gear shall not leak during testing, storage and transportation. 4.7 Rust prevention and coating
The joint surfaces of the spline, cone and thread of the steering gear should be coated with grease, and the other surfaces should be painted. The paint layer should comply with the provisions of TQ-2-1-DM in JB/T5673.
5 Test method
5.1 Running-in
JB/T8582.42001
5.1.1 Before the performance and fatigue life test, the product should be run-in under the following working conditions: a) The input shaft angle is not less than 90% of the full angle; b) The load applied to the steering rocker arm shaft or rack is 40% of the rated output torque (force); c) The number of cycles is not less than 1.5×103;
d) The input shaft speed is not greater than 10rmin during running-in; e) The lubricating oil is replaced after running-in.
5.1.2 When testing the steering gear, lubricate it under the conditions specified in the instruction manual and/or product drawings. 5.2 Determination of the full rotation angle of the input shaft
Rotate the input shaft from one extreme position to another and measure the total rotation angle. 5.3 Determination of transmission ratio characteristics
5.3.1 Determination of angular transmission ratio characteristics
5.3.1.1 Angular transmission ratio
The angular transmission ratio is calculated according to formula (3):
Where: R
Angular transmission ratio:
Input shaft rotation angle, (°);
β——steering rocker arm shaft rotation angle, (°). 5.3.1.2
Measurement range
The measurement range shall not be less than 90% of the full rotation angle of the input shaft. 5.3.1.3 Measurement point interval
The input shaft rotation angle increment shall not be greater than 45°, and the input shaft rotation angle increment of the variable ratio steering gear shall not be greater than 18°. 5.3.1.4 Determination method
Drive the input shaft, measure the input shaft angle and the corresponding steering rocker arm shaft angle, take the increment, and substitute it into formula (3) to obtain the angular transmission ratio. The measurement error of the input shaft angle is not greater than 10, and the error of the steering rocker arm shaft angle is not greater than 1.5. The measurement results are given in the format of Table AI and Figure A1 in Appendix A (Suggested Appendix).
5.3.2 Determination of linear angular transmission ratio
5.3.2.1 Line angle transmission ratio
The line angle transmission ratio is calculated according to formula (4):
Wherein: ILR
Line angle transmission ratio, mm/(°);
L-rack displacement distance, mm;
Input shaft rotation angle, (°).
5.3.2.2 Measurement range
JB/T8582.42001
The measurement range shall not be less than 90% of the full rotation angle of the input shaft5.3.2.3 Measurement point interval
The input shaft rotation angle increment shall not exceed 45°, and the input shaft rotation angle increment of the speed ratio steering gear shall not exceed 18°5.3.2.4 Measurement method
Drive the input shaft, measure the input shaft rotation angle and the corresponding rack displacement, take the increment, and substitute it into formula (4) to obtain the line angle transmission ratio. The measurement error of the input shaft rotation angle is not greater than 10; the error of the rack displacement is not greater than 0.01mm. The measurement results are given in the format of Table A2 and Figure A2 in Appendix A.
5.4 Determination of transmission clearance characteristics
5.4.1 Measurement range
The measurement range is not less than 90% of the full rotation angle of the input shaft. 5.4.2 Determination method
After the input shaft rotates a certain angle, it is fixed, and a torque of 10N·m is applied to the steering rocker arm shaft to measure the corresponding rotation angle of the steering rocker arm shaft, or a force of 400N is applied to the rack to measure the corresponding displacement of the rack. The measurement error is not greater than 1.5 or 0.01mm. The measurement results are given in the format of Table A3 and Figure A3 in Appendix A.
5.5 Determination of transmission efficiency characteristics
5.5.1 Determination of transmission efficiency of worm-roller type, recirculating ball type and worm-pin type steering gears 5.5.1.1 Transmission efficiency
The transmission efficiency is calculated according to formula (5) and formula (6): Where: Ⅱ+——positive transmission efficiency;
n.--reverse transmission efficiency:
M,×100%
Wle×100%
W, W,-input and output torques of the input shaft, N·m; M, M-input and output torques of the steering rocker arm shaft, N·m; R-angular transmission ratio.
5.5.1.2 Mean square error of positive transmission efficiency
The mean square error of positive transmission efficiency is calculated according to formula (7): o
Wherein: - Mean square error:
[(n.-n*) +A +(n. -n*)
Positive transmission efficiency of each measuring point, %
Average positive transmission efficiency, %;
Total number of measuring points.
5.5.1.3 Measurement conditions
JB/T8582.42001
a) The load on the steering rocker shaft is 40% of the rated output torqueb) The input shaft speed is not greater than 10r/min
e) The input shaft rotation angle range is not less than 85% of the full rotation angled) The measuring points correspond to those in 5.3.1.3.
5.5.1.4 Determination method
Drive the input shaft, add a load to the steering rocker shaft, measure the input torque W of the input shaft and the output torque M of the steering rocker shaft, and substitute them into formula (5) to obtain the positive transmission efficiency n. Conversely, drive the steering rocker shaft, add a load to the input shaft, measure the input torque M of the steering rocker shaft and the output torque W of the input shaft, and substitute them into formula (6) to obtain the reverse transmission efficiency II. Substitute the positive transmission efficiency value of each measuring point and its average value into formula (7) to obtain the mean square error value. The measurement error shall not be greater than 2%. The measurement results are given in the format of Table A4 and Figure A4 in Appendix A. 5.5.2 Determination of transmission efficiency of rack and pinion steering gear 5.5.2.1 Transmission efficiency
The transmission efficiency is calculated according to formula (8) and formula (9): F,tR=×100%
17.45Wz×100%
Where: W, Wz Input shaft input and output torque, N·mF, F2 Rack input and output force, N: LR——Line angle transmission ratio, mm/(°). 5.5.2.2 Determination conditions
a) Rack axial force is 40% of the rated output force b) Input shaft speed is not greater than 10r/min: c) Input shaft angular range is not less than 85% of the full angle d) Measurement points correspond to 5.3.2.3.
5.5.2.3 Determination method
Drive the input shaft, add a load to the rack, measure the input torque W of the input shaft and the output force F of the rack, and substitute them into formula (8) to obtain the positive transmission efficiency n+. Conversely, drive the rack, add a load to the input shaft, measure the input force F of the rack and the output torque W2 of the input shaft, and substitute them into formula (9) to obtain the reverse transmission efficiency n_. Substitute the positive transmission efficiency value of each measuring point and its average value into formula (7) to obtain the mean square error value. The measurement error shall not be greater than 2%. The measurement results are given in the format of Table A4 and Figure A4 in Appendix A. 5.6 Determination of torque
5.6.1 Determination conditions
a) The steering gear rocker arm shaft or rack is unloaded; b) The input shaft speed is not greater than 10r/min. 5.6.2 Determination method
Drive the input shaft and measure the torque of the input shaft at different rotation angles. The measurement error shall not be greater than 5%. The measurement results are given in the format of Table A5 and Figure A5 in Appendix A.
5.7 Determination of stiffness
5.7.1 Stiffness
Stiffness is calculated according to formula (10) and formula (11): JB/T8582.4—2001
T-T+TT
G,=0.573×
T,-T+TT
G,=0.573x-
Where: G is the torsional stiffness at a small torsion angle, N·m/rad; G
is the torsional stiffness at a large torsion angle, N·m /rad;
Torque value when the right torsion angle is 0.5°, N·cm;TB
Torque value when the right torsion angle is 2.5°, N·cmTorque value when the left torsion angle is 0.5°, N·cm;Torque value when the left torsion angle is 2.5°, N·cm;Torque value when the right torsion angle is 10°, N·cm;Torque value when the right torsion angle is 15°, N·cm:Torque value when the left torsion angle is 10°, N·cm-Torque value when the left torsion angle is 15°, N·cm. 5.7.2 Measurement conditions
a) The steering rocker arm shaft or rack is fixed in the middle position: 2
b) The input shaft speed should not be greater than 0.5r/min when measuring G, and should not be greater than 2r/min when measuring G5.7.3 Measurement method
5.7.3.1 Measurement of G
Fix the steering rocker arm shaft or rack, twist the input shaft to 5° to the left, and return to the middle position: change to twist the input shaft to 5° to the right, and then return to the middle position. Repeat twice, measure the torsion angle of the input shaft and the corresponding torque value each time it is twisted left and right, and the results are expressed as a curve. Find the torque values of T, T, T and T from the curve, and substitute them into formula (10) to obtain the stiffness G. The measurement error shall not exceed 5%. 5.7.3.2G. Determination
Fix the steering rocker arm shaft or rack, twist the input shaft to 20° to the left, and return to the middle position: change to twist the input shaft to 20° to the right, and then return to the middle position. Repeat twice, measure the torsion angle and corresponding torque value of the input shaft each time when twisting left and right, and the results are expressed as a curve. Find the torque values of Tc, T, T and T from the curve, and substitute them into formula (11) to obtain the stiffness G. The measurement error shall not be greater than 5%. 5.8 Static torsion strength test
5.8.1 Test conditions
The steering rocker arm shaft or rack should be fixed at any position other than the two extreme positions. 5.8.2 Test method
a) Fix the steering gear, the steering rocker arm shaft or rack, apply the specified torque to the input shaft, measure the input torque and the corresponding input torsion angle value, and the results are expressed as a curve. The measurement error shall not be greater than 5%b) After the test, check the damage of the parts. 5.9 Drop hammer impact test
5.9.1 Test conditions
JB/T8582.42001
a) The steering gear should be firmly installed on the test bench base with a mass not less than 50 times the mass of the drop hammer: b) The input shaft should be fixed at any position other than the two extreme positions: c) The mass of the drop hammer is 50kg
5.9.2 Test method
a) Place the steering rocker arm horizontally or the rack vertically, and let the drop hammer fall freely after rising to the specified height to impact the end of the rocker arm or the top of the rack:
b) After the impact, check the damage of the parts: c) The impact test results are given in the format of Table A6 in Appendix A. 5.10 Fatigue life test
5.10.1 Test conditions
5.10.1.1 Forward drive
a) On the steering rocker shaft or rack, the test load applied is the rated output torque or rated output force: b) The angle of left and right rotation of the drive input shaft is 180° from the middle position; c) The speed of the drive input shaft shall not be greater than 30r/min; d) During the test, the temperature of the lubricating oil inside the steering gear shall not exceed 60℃: e During the test, the steering gear is allowed to be disassembled and inspected every 250,000 cycles, but parts replacement is not allowed. 5.10.1.2 Reverse drive
a) On the steering rocker shaft or rack, measure the test load applied to the input shaft, and the load value is the rated output torque or rated output force.
b) The angle of the left and right driving steering rocker arm shafts shall be 10° from the middle position, or the length of the left and right driving racks shall be 180lmm from the middle position.
c) The speed of driving the steering rocker arm shaft or rack shall not exceed 30r/min; d) During the test, the temperature of the lubricating oil inside the steering gear shall not exceed 60℃: e) During the test, the steering gear is allowed to be disassembled and inspected every 25,000 cycles, but parts are not allowed to be replaced. 5.10.2 Test method
a) Forward drive input shaft, reverse drive steering rocker arm shaft or rack; b) The maximum amplitude error of the forward drive and reverse drive loads shall not be greater than 5% C) Forward drive and reverse drive fatigue life test can be selected to do one d) Measure the number of cycles:
e) The test results are given in the format of Table A7 in Appendix A. 5.11 Inspection of other items
5.11.1 Use self-test or conventional methods to check the steering gear's turning flexibility and anti-rust and coating appearance quality. 5.11.2 The adhesion performance of the paint layer shall be inspected in accordance with the provisions of JB/T5673. 5.11.3 Place the steering gear input shaft vertically, fill it with diesel from the refueling screw hole, and check the sealing after 24 hours. 7
6 Inspection rules
6.1 Factory inspection
JB/T8582.4—2001
6.1.1 Each steering gear assembly must be inspected and qualified by the manufacturer before it can be shipped. When it leaves the factory, it should be accompanied by documents proving the quality of the product. 2 Factory inspection items include:
a) rotation flexibility;
b) input shaft full rotation angle:
c) anti-rust measures and coating appearance quality:
d) rotation torque:
e) transmission clearance characteristics:
f sealing.
3 For each steering gear assembly, the three items a), b), and c) in 6.1.2 shall be fully inspected, and all items must be qualified. 6.1.3
6.1.4 For the three items d), e), and f) in 6.1.2, the sampling inspection and judgment and disposal rules shall be in accordance with the provisions of GB/T2828. The normal inspection sampling plan can be adopted. The inspection batch is the monthly (or daily) output or the order batch at one time. The inspection level is the general inspection level II, and the qualified quality level (AQL) is 4.0.
Type inspection
6.2.1 Type inspection should be carried out in any of the following situations: a) trial production and identification of new products or old products transferred to other factories for production; b) after formal production, when there are major changes in structure, materials and processes that may affect product performance; c) during formal production, regular spot checks and inspections; d) when resuming production after a long period of suspension;
e) when the national quality supervision agency makes a request for type inspection. 2 Type inspection items and their classification are shown in Table 3. 6.2.2
Item classification
Item name
Transmission efficiency
Transmission ratio and full rotation angle of input shaft
Torsional stiffness
Static torsional strength
Impact strength
Fatigue life
Transmission clearance characteristics
Torque
Rotational flexibility
Sealing
Rust prevention and coating
Corresponding clause number
3 Sampling inspection and judgment and disposal rules shall be in accordance with the provisions of GB/T2828. A normal inspection and one-time sampling plan may be adopted, and the inspection level is 6.2.3
Special inspection level S-1, inspect no less than 30 pieces, sampling plan see Table 4.8
Project classification
Inspection level
Sample size
User acceptance
JB/T8582.42001
The user has the right to conduct random inspection on the steering gear assembly received. The inspection items, sampling plan, sampling inspection and judgment and disposal rules shall be determined by the supply and demand parties through negotiation in accordance with the provisions of GB/T2828
7 Marking, packaging, transportation and storage
The steering gear shall have the manufacturer's certificate of conformity stamp when leaving the factory, and shall indicate the manufacturer's name or factory logo. The steering gear should be packed reliably and accompanied by the instruction manual and certificate of conformity. The certificate of conformity should include the following contents: a) Name or logo of the manufacturer:
b) Product model, assembly number and product name) Signature of the quality management department of the manufacturer: d) Manufacturing date or production batch number.
The following contents should be marked on the outside of the package:
a) Name or logo of the manufacturer;
b) Product model, assembly number and product name: c) Packing quantity, gross weight and net weight;
d) Manufacturing date or production batch number:
e) Marked with the words "Handle with care" and "Keep away from moisture". 7.3 During the transportation of the steering gear, the exposed parts such as splines, cones and threads should be protected. 7.4 Under special circumstances, the packaging can be carried out according to the conditions agreed upon by the supply and demand parties. 5 The steering gear should be placed in a ventilated, dry and non-corrosive environment. 7.5
Determination of angular transmission ratio characteristics
Model and number of prototype:
Test date:
Test personnel:
Input shaft angle 6
Steering rocker shaft angle β (°)
Angular transmission ratio 1
Determination of linear angular transmission ratio characteristics
Model and number of prototype:
Test date:
Test personnel:
Input shaft angle 6
Rack displacement L
Line angle Transmission ratio IRmm ()
JB/T8582.4—2001
Appendix A
(Suggested Appendix)
Test result report format of steering gear for agricultural transport vehicleTest room temperature:
Angular transmission ratio
Figure A1 Angular transmission ratio characteristic curve
Test room temperature:
Line angular transmission ratio
mm/ ()
Figure A2 Line angular transmission ratio characteristic curve
Input shaft angle
Input shaft angle2. For the three items d), e) and f), the sampling inspection and judgment and disposal rules shall be in accordance with the provisions of GB/T2828. The normal inspection sampling plan may be adopted. The inspection batch is the monthly (or daily) output or the order batch at one time. The inspection level is the general inspection level II, and the qualified quality level (AQL) is 4.0.
Type inspection
6.2.1 Type inspection shall be carried out in any of the following situations: a) Trial production and identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials and processes, which may affect product performance; c) Regular random inspection during formal production; d) When resuming production after a long period of suspension;
e) When the national quality supervision agency puts forward the requirement of type inspection. 2 Type inspection items and their classification are shown in Table 3. 6.2.2
Item classification
Item name
Transmission efficiency
Transmission ratio and full rotation angle of input shaft
Torsional stiffness
Static torsional strength
Impact strength
Fatigue life
Transmission clearance characteristics
Torque
Rotational flexibility
Sealing
Rust prevention and coating
Corresponding clause number
3 Sampling inspection and judgment and disposal rules shall be in accordance with the provisions of GB/T2828. A normal inspection and one-time sampling plan may be adopted, and the inspection level is 6.2.3
Special inspection level S-1, inspect no less than 30 pieces, sampling plan see Table 4.8
Project classification
Inspection level
Sample size
User acceptance
JB/T8582.42001
The user has the right to conduct random inspection on the steering gear assembly received. The inspection items, sampling plan, sampling inspection and judgment and disposal rules shall be determined by the supply and demand parties through consultation in accordance with the provisions of GB/T2828
7 Marking, packaging, transportation and storage
The steering gear shall have the manufacturer's certificate of conformity stamp when leaving the factory, and shall indicate the manufacturer's name or factory logo. The steering gear should be packed reliably and accompanied by the instruction manual and certificate of conformity. The certificate of conformity should include the following contents: a) Name or logo of the manufacturer:
b) Product model, assembly number and product name) Signature and seal of the quality management department of the manufacturer: d) Manufacturing date or production batch number.
The following contents should be marked on the outside of the package:
a) Name or logo of the manufacturer;
b) Product model, assembly number and product name: c) Packing quantity, gross weight and net weight;
d) Manufacturing date or production batch number:
e) Marked with the words "Handle with care" and "Keep away from moisture". 7.3 During the transportation of the steering gear, the exposed parts such as splines, cones and threads should be protected. 7.4 Under special circumstances, the packaging can be carried out according to the conditions agreed upon by the supply and demand parties. 5 The steering gear should be placed in a ventilated, dry and non-corrosive environment. 7.5
Determination of angular transmission ratio characteristics
Model and number of prototype:
Test date:
Test personnel:
Input shaft angle 6
Steering rocker shaft angle β (°)
Angular transmission ratio 1
Determination of linear angular transmission ratio characteristics
Model and number of prototype:
Test date:
Test personnel:
Input shaft angle 6
Rack displacement L
Line angle Transmission ratio IRmm ()
JB/T8582.4—2001
Appendix A
(Suggested Appendix)
Test result report format of steering gear for agricultural transport vehicleTest room temperature:
Angular transmission ratio
Figure A1 Angular transmission ratio characteristic curve
Test room temperature:
Line angular transmission ratio
mm/ ()
Figure A2 Line angular transmission ratio characteristic curve
Input shaft angle
Input shaft angle2. For the three items d), e) and f), the sampling inspection and judgment and disposal rules shall be in accordance with the provisions of GB/T2828. The normal inspection sampling plan may be adopted. The inspection batch is the monthly (or daily) output or the order batch at one time. The inspection level is the general inspection level II, and the qualified quality level (AQL) is 4.0.
Type inspection
6.2.1 Type inspection shall be carried out in any of the following situations: a) Trial production and identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials and processes, which may affect product performance; c) Regular random inspection during formal production; d) When resuming production after a long period of suspension;
e) When the national quality supervision agency puts forward the requirement of type inspection. 2 Type inspection items and their classification are shown in Table 3. 6.2.2
Item classification
Item name
Transmission efficiency
Transmission ratio and full rotation angle of input shaft
Torsional stiffness
Static torsional strength
Impact strength
Fatigue life
Transmission clearance characteristics
Torque
Rotational flexibility
Sealing
Rust prevention and coating
Corresponding clause number
3 Sampling inspection and judgment and disposal rules shall be in accordance with the provisions of GB/T2828. A normal inspection and one-time sampling plan may be adopted, and the inspection level is 6.2.3
Special inspection level S-1, inspect no less than 30 pieces, sampling plan see Table 4.8
Project classification
Inspection level
Sample size
User acceptance
JB/T8582.42001
The user has the right to conduct random inspection on the steering gear assembly received. The inspection items, sampling plan, sampling inspection and judgment and disposal rules shall be determined by the supply and demand parties through negotiation in accordance with the provisions of GB/T2828
7 Marking, packaging, transportation and storage
The steering gear shall have the manufacturer's certificate of conformity stamp when leaving the factory, and shall indicate the manufacturer's name or factory logo. The steering gear should be packed reliably and accompanied by the instruction manual and certificate of conformity. The certificate of conformity should include the following contents: a) Name or logo of the manufacturer:
b) Product model, assembly number and product name) Signature of the quality management department of the manufacturer: d) Manufacturing date or production batch number.
The following contents should be marked on the outside of the package:
a) Name or logo of the manufacturer;
b) Product model, assembly number and product name: c) Packing quantity, gross weight and net weight;
d) Manufacturing date or production batch number:
e) Marked with the words "Handle with care" and "Keep away from moisture". 7.3 During the transportation of the steering gear, the exposed parts such as splines, cones and threads should be protected. 7.4 Under special circumstances, the packaging can be carried out according to the conditions agreed upon by the supply and demand parties. 5 The steering gear should be placed in a ventilated, dry and non-corrosive environment. 7.5
Determination of angular transmission ratio characteristics
Model and number of prototype:
Test date:
Test personnel:
Input shaft angle 6
Steering rocker shaft angle β (°)
Angular transmission ratio 1
Determination of linear angular transmission ratio characteristics
Model and number of prototype:
Test date:
Test personnel:
Input shaft angle 6
Rack displacement L
Line angle Transmission ratio IRmm ()
JB/T8582.4—2001
Appendix A
(Suggested Appendix)
Test result report format of steering gear for agricultural transport vehicleTest room temperature:
Angular transmission ratio
Figure A1 Angular transmission ratio characteristic curve
Test room temperature:
Line angular transmission ratio
mm/ ()
Figure A2 Line angular transmission ratio characteristic curve
Input shaft angle
Input shaft angle
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