This standard specifies the technical requirements, test methods, acceptance rules and marking, packaging, transportation and storage of mechanical steering gears for tractors. This standard applies to worm roller type, recirculating ball type, crank pin type and worm gear type mechanical steering gears (hereinafter referred to as steering gears). JB/T 8404.1-1996 Technical requirements for mechanical steering gears for tractors JB/T8404.1-1996 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T 8404.1-96
Tractor Steering Gear
1.996-09-03 Issued
Ministry of Machinery Industry of the People's Republic of China
Technical Conditions
1997-97-01 Implementation
JH/T8404.1-96
This standard is a revision of N383-<Technical Document of Tractor Steering Gear>. The relevant technical contents are consistent with the relevant provisions in JB/T7279-9>Test Method of Wheel Trailer Cylinder Steering System>. At the same time, other issues in the standard are also noted. This standard is used in conjunction with JBT840.2-56 Test Method of Tractor Steering Gear Bench.
This standard is effective from the date of the National Technical Committee for the Standardization of Tractors (NI83-5). This standard is proposed and approved by the National Technical Committee for the Standardization of Tractors (NI83-5). The main parties to this standard are: Luyang Tractor Research Institute. Scope
Standards of the Machinery Industry of the People's Republic of China
Tractor Mechanical Steering Gear
Technical Specifications
JB/T 8404.1-96
This standard specifies the technical requirements, test methods, acceptance rules and markings, packaging, transportation and storage of tractor mechanical steering gears. This standard covers the mechanical steering gears of the traction wheel type, recirculating ball type, flex-actuated finger-assisted type and return wheel type (hereinafter referred to as steering gears). 2 Referenced Standards
The referenced standards are listed in the table, and all of them become standard documents after being cited in this standard. The versions shown are valid when this standard is published. All standards may be revised. Parties using this standard should consider the possibility of using the following standards to accept the new version GB282887
JE/T 5675-51
Also batch inspection counting sample procedure sampling table (applicable to continuous batch inspection) in the industry to verify the machine modification machine coating general technical strip /T814.2-6 tractor fast turner table dyeing test core method 3 control technical requirements
3.1, the steering gear should meet the requirements of this standard, and in accordance with the specified procedure to annotate the sample acceptance technical documents manufacturing: 3.2 steering gear performance
3.7.1 transmission The efficiency output value shall be in accordance with the provisions of Table 1. Table 1 The steering gear transmission vehicle
Snail deep wheel type,
The final wheel is sliding contact system
Universal type
Three-handle finger type
Snail dry type
Ensure efficiency +
3.2.2 The steering input angle transmission ratio shall comply with the design requirements, 3.2.3 The full angle transmission constant shall comply with the design requirements. 3.2.4 The no-load resistance should not be greater than 3N-m.
45%~55%
35%-65%
3.2.5 The small corner torsional stiffness when the rotor is in the middle position should be less than 2C≤m/ral. The small corner torsional stiffness should not be less than 27N.m/rad.
3.3 Steering strength
3.3. The rotor shall be subjected to static simulation test and no damage shall occur. 3.3.2 After the rotor is subjected to frequency shock test, no damage such as indentation, distortion, crack, and deformation shall be observed. 3.4 Steering gear life span
Approved by the Ministry of Machinery Industry on September 0, 1996
Implementation on July 1, 1996
JB/T 84D4.1-96
After the fatigue life test of the steering gear for 3×10 cycles, the parts shall not have any accumulation of corrosion (including pitting and falling off), and the corrosion shall be within the usable range:
3.5 The steering gear is allowed to have oil floating phenomenon and mud is not allowed to enter the rail body. 3.6 The surface finish of the steering gear shall comply with the provisions of JB/T5673. 3.7 Warranty period: Under the condition that the user complies with the storage, installation, use and maintenance regulations of the product, the warranty period of the steering gear is the same as that of the manufacturer. During the warranty period, if the product is damaged or cannot be used properly due to poor manufacturing quality, the manufacturer will provide three guarantees: 4 Test method
According to the provisions of JB/T8404.2,
5 Acceptance rules
Each product must be inspected by the quality inspection department of the manufacturer before it can be shipped out of the factory. When leaving the factory, it should be accompanied by documents proving that the product quality is qualified. 5.1
5 .2 Factory inspection items: a) Rotational flexibility; b) Appearance quality: c) Total speed of input shaft; e) Air resistance torque: e) Special inspection, seals; 5.3 Type inspection: 5.3.1 Type inspection is carried out when one of the following situations occurs: a) New product trial production, old product transfer to factory production; b) Formal production, such as when there are major changes in materials and processes that may affect the performance of the product; c) Inspection during normal production: ) After the product is discontinued, production will resume after the suspension of production. 5. 3. 2 Type inspection items: a) Performance test: h) Visibility test; ) Viscosity test.
5.3.3 Test samples: 5 samples are selected from the qualified products in the factory inspection, 2 of which are tested for performance and static test in strength test, 1 is tested for chain impact test in strength test, and 2 are tested for life test. 5.4 Users have the right to conduct random inspections on the products received. The test items can be selected at will. The sample size and measurement level should be in accordance with the provisions of G.2828. Specific sampling plan and setting rules: can be agreed upon by both parties. 6 Marking, packaging, transportation and storage
Steering gear is out! "When checking, the manufacturer shall prove the quality of the product, and the name or standard of the manufacturer shall be marked. 6.2 The product packaging shall be accompanied by a product certificate, a packing list, and an installation and use manual. The certificate shall include the following contents: 1) The name or trademark of the screening factory
b) Product model. Product name:
e) Signature and seal of the quality inspection and supervision department of the manufacturer:
Date and batch number
6.3 The outside of the package shall be marked with:
1) Manufacturer's name or trademark;
b) Product model, product name:
c) Receiving unit, address:
Packing quantity, weight, net
e) Date of manufacture or batch number:
f) "Xiao Xiao Qing Zheng" "Lu Yuan" learning sample. JB/T 8404. 1~96www.bzxz.net
64 During transportation, the exposed parts such as the flower chain, screw thread and fiber surface should be protected and cut off. <5 Under special circumstances, the product can be packaged under the conditions agreed upon by the supplier and the supplier. 6. The product should be stored in a ventilated and dry environment: under normal storage conditions, within one year from the date of production, if rust occurs, the manufacturer shall be responsible for the damage.
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