JB/T 7766.1-1999 This standard is a revision of NJ 361-85 "Technical Conditions for Fingerwheel Rakes". The main technical content changes are as follows: - Added power consumption per meter of raking width in the technical requirements; - Changed the inspection rules in the original standard. This standard specifies the technical requirements, inspection rules, and requirements for marking, packaging, and storage of fingerwheel rakes. This standard is applicable to fingerwheel rakes that complete raking and turning operations on flat grasslands with a dry grass yield of 750~6000kg per hectare. This standard was first issued on April 3, 1985. JB/T 7766.1-1999 Technical Conditions for Fingerwheel Rakes JB/T7766.1-1999 Standard download decompression password: www.bzxz.net

ICS65.060.50
Machinery Industry Standard of the People's Republic of China
JB/T7766.1-1999
Finger wheel tedders
Technical specifications
Technical specifications for finger wheel teddersPublished on August 6, 1999
National Bureau of Machinery Industry
Implemented on January 1, 2000
JB/T 7766.1-1999
This standard is a revision of NJ361-85 "Technical specifications for finger wheel tedders". Compared with NJ361-85, the main technical content of this standard has been changed as follows: Add power consumption per meter of floor width in the technical requirements - Change the inspection rules in the original standard.
This standard replaces NJ361-85 from the date of implementation. This standard is proposed and managed by Hohhot Animal Husbandry Machinery Research Institute. The drafting units of this standard are: Hohhot Animal Husbandry Machinery Research Institute, Xinjiang Animal Husbandry Machinery Factory. The main drafters of this standard are: Yang Tiejun, Gui Yingfa. This standard was first issued on April 3, 1985. 1 Scope
Machinery Industry Standard of the People's Republic of China
Technical specifications for finger wheeled turf machines
Technical specifications for finger wheeled turf machines This standard specifies the technical requirements, inspection rules, marking, packaging and storage of finger wheeled turf machines. JB/T 7766.11999
Replaces NJ361-85
This standard is applicable to finger wheeled turf machines (hereinafter referred to as turf machines) that complete turfing and turning operations on flat grasslands with a dry grass yield of 750~6000kg per hectare
2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the following standards. GB/T2828—1987
GB/T4357—1989
GB/T14247—1993
JB/T56731991
3 Technical requirements
Batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) Carbon spring steel wire
Test methods for floor mowers
General technical conditions for painting of agricultural and forestry tractors and implements 3.1 Floor mowers shall comply with the requirements of this standard and be manufactured according to product drawings and technical documents approved by the prescribed procedures. 3.2 All parts must be inspected and qualified, and purchased parts must have certificates of conformity. 3.3 Welded parts should not have defects such as leaking welds, cracks, slag inclusions, burn-throughs and incomplete penetration. 3.4 Traction-type floor mowers should be equipped with a mechanism that enables the finger wheels to rise and fall reliably. 3.5 The mower should be equipped with a mechanism to adjust the pressure of the finger wheel on the soil. 3.6 The structure of the finger wheel and support wheel of the mower should prevent grass entanglement. The leakage rate shall not exceed 2%.
The width of the transport state shall not exceed 4m.
3.9 The ground clearance for transportation shall not be less than 200mm. 3.10
The width of the formed grass strip shall not exceed 1.25mm. The working speed is 8~12km/h. The reliability coefficient should be greater than 98%. The power consumption per meter of floor width should be less than 1.77kW. 3 Main parts
3.13.1 The material of the floor teeth should be made of C-grade steel wire with performance not lower than GB/T4357, and its hardness after heat treatment is 36~41HRC. Under normal working conditions, the teeth should not produce large plastic deformation. Approved by the State Bureau of Machinery Industry on August 6, 1999, and implemented on January 1, 2000
JB/T7766.1-1999
3.13.2 The surface of the floor teeth must be treated with rust prevention. The broken tooth rate of the entire floor mower should not exceed 39% when working 120ha per meter of floor width. 3.14 Main components
3.14.1 When assembling the finger wheel, the floor teeth can be assembled in groups. After assembly, the finger tip should be in a plane perpendicular to the finger wheel axis, and the end face circular runout error should not exceed 20mm.
3.14.2 The radial circular runout error of the finger wheel after assembly should not exceed 10mm. 3.15 General assembly
3.15.1 When the finger wheel is turned by hand, it should rotate flexibly without any jamming. 3.15.2 The deviation of the distance between adjacent finger wheel axes should not exceed 15mm. The deviation of the wheel rim distance between adjacent finger wheels shall not exceed 15mm. 3.15.3
3.15.4 Appropriate lubricating grease shall be injected into all lubrication points of the whole machine. 3.15.5
All fasteners and connectors must be firmly and reliably connected. 3.15.6 The friction surfaces with relative motion of the whole machine shall be coated with anti-rust oil, and the other outer surfaces shall be painted according to the provisions of TQ-2-2-DM of JB/T5673.
3.16 Service life
The service life of the grass machine shall not be less than 5 years, and its annual workload shall be calculated as 120ha of grass per meter of grass width. 3.17 Safety requirements
3.17.1 When the grass machine is connected to the tractor for transportation, all connection parts must be firm and reliable. 3.17.2 When the grass machine is parked alone, there should be a mechanism to maintain stability and facilitate connection with the tractor. 4 Inspection rules
4.1 Factory inspection
4.1.1 Each lawn mower must undergo factory inspection and can only leave the factory after passing the inspection by the quality inspection department. 4.1.2 Factory inspection shall comply with the requirements of 3.8, 3.9, 3.14 and 3.15. 4.2 Type inspection
4.2.1 When the product has any of the following conditions, it shall be subject to type inspection in accordance with the provisions of GB/T14247: a) new products or products with major changes in performance, structure, materials and processes; b) when the product resumes production after 3 years of normal production or 2 years of suspension and when the old product is transferred to the factory for production; c) when the national quality supervision agency proposes type inspection requirements. 4.2.2 See Table 1 for defect classification. In accordance with the provisions of GB/T2828, this standard stipulates the use of a normal sampling plan and stipulates the use of inspection levels, with 2 to 8 units as an inspection batch. The sampling plan is shown in Table 2. 4.2.3 During the inspection, inspection conclusions shall be made for each group of defects separately. When the number of defects in the inspected group is less than or equal to the unqualified judgment number Ac, the whole batch of products is finally judged to be accepted; when the number of any defects in the inspected group is greater than or equal to the unqualified judgment number Re, the whole batch of products is finally judged to be rejected.
JB/T7766.1-1999
Power consumption
Reliability coefficient
Broken tooth rate
Missed connection rate
Plastic deformation of floor teeth
Working speed
Width of grass strip
Prevent grass entanglement
End face circular runout of finger wheel fingertip
Radial circular runout of finger wheel fingertip
Flexibility of finger wheel rotation
Transportation clearance
Distance deviation of adjacent finger wheel axes
Distance difference of adjacent finger wheel rims
Transportation width||tt| |Operation and adjustment mechanism
Minor defects
Defect classification
Number of items
Inspection level
Sample code
Number of samples
Qualified products
Marking,
Packaging and storage
Each product should have a label, the content of which includes: 5.1
Model, name;
b) Working width, m;
Machine weight, kg;
d) Matching power, kw;
Manufacturer number;
f) Factory date;
Manufacturer name.
5.2 Random accessories, spare parts and tools should be complete. 5.3 The accompanying technical documents include:
a) Instruction manual;
b) Product quality certificate;
c) Packing list;
d) Three-guarantee certificate.
JB/T7766.1-1999
5.4 The grass machine can be shipped out of the factory in general assembly or in parts. When the parts are shipped out of the factory, all parts of the machine should be intact. The packaging must be firm and reliable and comply with the relevant regulations of the traffic management department. 6
Manufacturer's guarantee
If the user complies with the conditions of transportation, storage and use specified in the instruction manual of the product, and the product is damaged due to poor manufacturing quality within the one-year three-guarantee period, its seller, repairer, and manufacturer shall be responsible for repair, replacement and return according to the requirements of the "Regulations on the Responsibility of Repair, Replacement and Return of Agricultural Machinery Products".
People's Republic of China
Mechanical Industry Standard
Technical Conditions for Wheel-type Grass-feeding Machines
JB/T 7766.11999
Published by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Sciencebzxz.net
(No. 2, Shouti South Road, Beijing
Format: 880×1230
Postal Code: 100044)
Sheet: 1/2
Word Count: 10,000
First Edition in December 1999
First Printing in December 1999
Print Quantity: 1-500
Price: RMB 5.00
99-1314
Mechanical Industry Standards Service Network: http://www.JB.ac.cn666199
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