This standard specifies the technical requirements, inspection rules, marking, packaging and storage of starter roller type one-way clutches for agricultural tractors and internal combustion engines. JB/T 6705-1993 Technical conditions for starter one-way clutch for tractors and internal combustion engines JB/T6705-1993 Standard download and decompression password: www.bzxz.net

Machinery Industry Standards of the People's Republic of China
Technical Conditions for One-way Clutches for Starters for Tractors and Internal Combustion Engines
Subject Content and Scope of Application
JB/T 6705 -.93
This The standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of starter roller one-way clutches (hereinafter referred to as one-way clutches) for tractors and internal combustion engines. This standard applies to tractors, agricultural transport vehicles and Reference standard for single question clutch 2 for starters for fixed internal combustion engineswwW.bzxz.Net
GB1.3 Standardization Work Guidelines Product Standard Writing Regulations GB2828 Batch-by-batch inspection and counting sampling procedures and sampling tables (applicable to inspections of continuous batches) GB10095 Involute Cylindrical gear accuracy
3 Technical requirements
3.1 The one-way device shall be manufactured according to the drawings and technical documents approved by the prescribed procedures. 3.2 The one-way device should be able to work normally under the ambient temperature of -40~95C. 3.3 The shape and matching dimensions of the one-way device should comply with the product drawings. 3.4 The gear material is alloy steel, the tooth surface hardness is 58~63HRC, and the carburized layer depth is 0.71.2mm. 3.5 The gear accuracy should not be lower than level 10 in GB10095. The tooth surface roughness Ra value is 3.2μm. The gear surface is not allowed to have cracks, scars, bruises and other defects
3.6 Internal splines of the one-way device The dimensions should comply with the drawings and the spline groove surface roughness Ra value should be 3.2am. The 3.7 one-way engagement spring pressure should comply with the drawings. 3.8 The forward moment and anti-slip moment of the one-way device shall comply with the drawings. 3.9 The one-way device slides flexibly on the starter armature shaft without getting stuck. 3.10 The one-way device should be able to work reliably after three times of exceeding performance tests. 3.11 The durability test of the starter one-way device for diesel engines is 15,000 times. After the test, it should No slipping, damage or abnormality. 3.12 If the user uses and stores the product in accordance with the manufacturer's regulations within 12 months from the date of delivery, if the product fails to operate normally due to product quality, the manufacturer shall repair or replace it for the user free of charge. 4 Inspection methods
4.1 The appearance and matching dimensions are inspected with measuring tools. 4.2 The gear accuracy is checked according to the relevant provisions of G1B310095, the surface roughness is checked with a roughness detector or sample block, and the surface quality is checked with the surrounding measurement method.
4.3 Use special measuring tools and roughness detectors (or sample blocks) to check the internal spline size and spline groove roughness. 4.4 Install the one-way device on the special spline shaft in any direction. Use manual methods to install the one-way shaft on the shaft. It slides back and forth, and the one-way device slides flexibly without getting stuck.
The Ministry of Machinery Industry of the People's Republic of China approved 114
1994-01-01 on 1993-07-29 to implement
4.5 meshing spring pressure with spring testing machine inspection. JB/T6705.--93
4.6 The dynamic torque of the one-way unit is measured on a special test bench. If there is no such test condition, the static torque can be checked at 7 times the braking torque.
To measure the reverse slipping moment, use a thin rope to wrap around the outer circumference of the gear several times. The other end of the rope: hang the base code vertically (or pull on a spring scale), and gradually increase the base code (or pulling force) until the gear just rotates. When, remember to find the weight (or pulling force) of the magnetic code, and calculate the torque according to the following formula: reverse torque (N·m) = weight of the magnetic code (kg) × acceleration of gravity (9.81m/s) × tooth skull diameter (m) Or:
Reverse question Ten thousand moments (N·) Two spring tensions (N) Throttle, so that the starter drive gear speed reaches 15000r/min. At this time, the starter speed should not be greater than 12000r/min. During the test, the starter operates at rated power for 25 seconds and 3 times. The time interval between two consecutive times should not be less than 15000r/min. 15$. 4.8 The durability test is carried out on the engine or simulation test bench according to the test method specified for the matching starter. 5 Inspection regulations
5.1 All interrogators must be inspected and passed the inspection before leaving the factory, and shall be accompanied by a product certificate or mark. 5.2 The inspection items are as follows:
a.
Outline and matching dimensions :
h.
Gear accuracy, roughness, surface quality; c.
Single pottery internal spline:
Engagement spring pressure (can be carried out before assembly ); d.
e.
positive moment and reverse slip moment
5.3 Users have the right to conduct acceptance according to GB2828. This standard recommends: a.
General Inspection level:
Qualified quality level: AQL0.40~6.5;
h.
C. Sampling Plan: Normal inspection sub-sampling plan. The specific AQL value and acceptance items shall be agreed upon by both parties. 5.4 Type inspection should be carried out from the same batch of products that have passed the inspection, and the number should be no less than 5, of which 2 should be subjected to durability testing. 5.5 Type inspection shall be carried out in accordance with the requirements of Article 6.6.1 in GB1.3. One-way units produced in batches or in large quantities are subject to type inspection every two years.
5.6 If one item is unqualified in the type inspection, double the number of products is allowed to be re-sampled for re-inspection of the unqualified item. If there are still unqualified items, the batch of products will be judged as unqualified, but The durability test shall not be reexamined. 6 Marking, packaging, transportation and storage
6.1·Each one-way device should be marked with the manufacturer's name, product name, product model, and date of manufacture. 6.2 Product packaging
6.2.1 Each one-way unit should be coated with anti-rust oil and packaged in plastic bags and cartons, with a product certificate included. 6.2.2 The packaging box should be firm, the product should not move around inside the box, and the total weight of the packaging box should not exceed 50kg. 6.2.3 Text and logos on the outer wall of the packaging box: name and address of the receiving unit, manufacturer's name and address, product name and model (or starter model equipped), quantity, gross weight, and "handle with care" and "moisture-proof" etc words. 6.3 During transportation and storage, products must not be exposed to moisture, heavy pressure, collision, or contact with corrosive substances such as acids and alkalis. 115
Additional notes:
JB/T6705—93
This standard is proposed by the National Technical Committee for Tractor Standardization. This standard is under the jurisdiction of the Luoyang Tractor Research Institute of the Ministry of Machinery Industry. This standard is drafted by Kaifeng Internal Combustion Engine Electrical Appliance Factory. The main drafters of this standard are Jin Yonglu and He Shusen. 116
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