This standard specifies the technical requirements for the assembly of bicycles. This standard applies to ordinary, lightweight, heavy-duty and sports bicycles as specified in QB1714 "Bicycle Naming and Model Compilation Method". GB/T 3566-1993 Bicycle Assembly Requirements GB/T3566-1993 Standard Download Decompression Password: www.bzxz.net

UDC629.118.3
National Standard of the People's Republic of China
GB/T3566---93
Bicycles
Assembly requirements
Assembly requirements of bicycles1993-07-21 Issued
Implementation on 1994-03-01
State Bureau of Technical Supervision Issued
National Standard of the People's Republic of China
Bicycles
Assembly requirements
Assembly requirements of bicyclesGB/T3566-93
Replaces GB3566-83
The purpose of formulating this standard is to put forward a comprehensive technical quality requirement for bicycle assembly to ensure the riding safety and performance of bicycles.
1 Subject content and scope of application
This standard specifies the technical requirements for the assembly of bicycles. This standard applies to ordinary, lightweight, heavy-duty and sports bicycles as specified in QB1714 Bicycle Naming and Model Compilation Method.
2 Reference Standards
GB3565 Bicycles. Safety Requirements
GB12742 Technical Conditions for Bicycle Testing Equipment and Apparatus Part I Technical Requirements
3 General Principles
3.1 All parts of a bicycle shall meet the requirements of their respective national standards or industry standards before assembly. 3.2 All parts that have been treated with surface decoration such as paint and electroplating shall not have obvious damage on their surfaces. 3.3 Bicycles shall be assembled according to their model requirements and shall not be assembled incorrectly or missed. 3.4· All fasteners of the bicycle shall be tightened. All rotating parts shall operate flexibly. 3.5 The assembled bicycle shall meet the requirements of GB3565. 3.6 The assembled bicycle shall be accompanied by a factory certificate. Its contents include the name of the manufacturer, assembly month, assembly employee number and inspection employee number. 3.7· The assembled bicycle should be accompanied by a manual, which includes instructions for use, maintenance, quality assurance and authorized repair points. 4· Front fork
The front fork should be flexible and not loose.
5 Handlebar
5.1 The depth of the handlebar stem inserted into the front fork stem should be above the minimum insertion depth mark, but when the handlebar is turned, the brake handle should not rub against the frame upper tube.
5.2 The tightening torque of the handlebar core screw and the handlebar joint screw should not be less than 18N·m. 5.3 The handlebar cross tube should be kept straight with the center plane of the front wheel and should not have obvious tilt. 5.4. The handlebar cover and handlebar should be assembled in place.
Approved by the State Administration of Technical Supervision on July 21, 1993, and implemented on March 1, 1994
6 Saddle
CB/T3566-93
6.1 The depth of the saddle tube inserted into the frame stem should be above the minimum insertion depth mark. 6.2 The seat position should be installed correctly and there should be no obvious deviation. 6.3 The tightening torque of the seat clamping bolts and the frame rear joint screws should not be less than 18V·m7 Middle Shaft
7.1 The tightening torque of the middle shaft lock nut (middle shaft cup lock nut) should not be less than 30N,m. 7.2-The shaft cup of the A and C type middle shaft should be pressed into the frame joint smoothly, and the right middle shaft cup of the B type middle shaft should be tightened to the bottom. After the middle shaft lock nut (middle shaft cup lock nut) is tightened, the middle shaft should rotate flexibly and without looseness. 8 Crank
The installation directions of the two crank pins should be opposite, and the two end surfaces of the middle shaft should be flush with the outer side surface of the crank. 9 Crankshaft
The crankshaft should be tightly connected to the crank and should not be loose. 10 Speed ​​change devicebzxz.net
10.1 After installation and adjustment, the external speed change device should have the correct gear within the speed change range. 102. After installation and adjustment, the internal speed change rear axle device should have a clear speed change position and no gap in the middle. 11 Chain and chain guard
17.1 The chain should be of appropriate tightness and run flexibly. 11:2 The chain spring should be installed on the outside, and the open end should be opposite to the direction of chain movement. 11-3 The chain guard should be well positioned, not loose, and should not rub against the chain, sprocket, or crank. 12 Spokes
12.1 The valve hole should be between the large gears of the two spokes. -12:2 Spokes should be evenly spaced, and the spoke thread heads should not protrude outside the spoke nut: 13- Rim
13.1 For wheels equipped with rim brakes, the radial and end face circular runout should not exceed 2mm, and for rims without rim brakes, the radial and end face runout should not exceed 4mm. 13.2 The center plane of the rim should be located in the center of the two mounting planes of the front and rear axles, and the relative position deviation should not exceed 2mm. Note: 1) The axle refers to the outer end faces of the two axle guards: for axle guards with rusty nuts, it refers to the outer end faces of the two locking nuts; for multi-stage flywheel rear axles with sleeves, it refers to the outer end faces of the axle guards and sleeves.
14. Tires
The tires should be inflated according to standard air pressure, and there should be no obvious twisting or wrinkling of the inner and outer tires. The valve cans should not be tilted. 15 Wheels
15.1 The front and rear wheels are level with the front and rear frames. The relative deviation of the clearance between the two sides of the wheel shall not exceed 3mm for the wheel with rim, and not exceed 6mm for the wheel without rim.
GB/T3566-93
15.2 The relative deviation of the center plane of the front and rear wheels shall not exceed 7mm. The tightening torque of the front wheel shall not be less than 18N·m, and the tightening torque of the rear wheel shall not be less than 30N·m. 15.3
The front and rear wheels shall be flexible and not loose. 16 Brake handle
16.1 The front brake handle shall be installed on the right side of the handlebar, and the rear brake handle shall be installed on the left side of the handlebar. 16.2 The brake handle shall be flexible to operate and can be quickly reset with the help of the brake spring. -17 Brake
17.1 Ordinary brake and caliper brake
17.1.1. The left and right brake skins shall be parallel to the brake receiving part of the rim, and the height shall be consistent. The distance between the brake skin and the wheel shall not exceed 3mm. 17.1.2 During braking, the brake pads shall not collide with any other parts except the wheel. The brake pads on both sides can contact the wheel rim at the same time. After releasing the brake, the brake pads can be quickly reset with the help of the brake elastic force.
17.2 Opening and holding brakes
The brake pad clearance of the opening and holding brakes should be adjusted appropriately to achieve the braking purpose and can be quickly reset after releasing the brake. 18. Mud plate
Mud plate shall not be obviously twisted:
19 Bell
The bell should be easy and flexible to use.
20. Clothes hanger and bracket
20.1 The clothes hanger should be symmetrical with the wheel and have no obvious deflection: 20.2 The double bracket should be symmetrical with the wheel and have no obvious deflection. After the vehicle is supported, it can make the vehicle stand vertically. 20.3 The bracket should be flexible to use and easy to reset. Part II, Test Methods
The testing equipment and instruments used in this test shall comply with the provisions of GB.12742 21: Front fork flexibility
Turn the handlebars back and forth by hand, and the front fork bearings shall not be tight, dull or loose: 22 Middle axle flexibility
Turn the crank by hand, and the bearings shall be flexible and shall not be tight, dull or loose. 23 Measurement of radial and end face runout of rim Place the finished vehicle on a special test stand, and use a dial indicator to measure its radial and end face runout on one side of the rim. 24. Relative deviation measurement of the two sides of the mounting plane of the front and rear axles on the center of the wheel Use a special tool (see Figure 1) to measure the distance between the mounting plane and the measuring surface of the special tool on both sides of the rim, and the difference is the relative net. Measuring point, first select one point to escape the measuring plate and then measure another point in the vertical direction, and the maximum value shall prevail. 25: Inspecting the twist and wrinkles of inner and outer tires
GB/T356693
Inflate according to the standard pressure, self-test and inspect the outer tire, then deflate, turn up the outer tire and inspect the inner tire. 26Measurement of the relative deviation of the gap between the front and rear wheels and the front fork, frame flat and upright fork. Hold up the frame, take a fixed point on the outside of the front fork, frame flat and upright fork (see Figure 2), and use a depth vernier caliper to measure perpendicular to the axial plane of the rim. The difference between the measured values ​​on both sides is the relative deviation. Figure 2
27Measurement of the relative deviation of the center plane of the front and rear wheels GB/T-3566-93
Tighten the special tool rim clamp on the farthest rim of the front and rear wheels respectively, and make it in a straight line with the center of the front and rear axles (see Figure 3). At the specified distance of the special tool-distance measuring rim, draw a horizontal line parallel to the rear wheel plane (so that α=b), and adjust the front wheel so that d (or c) is equal to. , cabinets, etc., the three points are in a straight line, and the distance (or d) of a point not on the straight line is measured minus a (or b) and divided by 2 to obtain the center deviation. Figure 3
28 Front and rear wheel flexibility
Use to gently turn the front and rear wheels to check whether the rotation is flexible. When about to stop, the wheels should be able to swing back and forth briskly and should not stop suddenly.
29 The brake pad is parallel to the brake part of the rim, and the height is consistent; the gap between the brake pad and the rim is measured by visual inspection. Use a special feeler gauge to measure the gap between the two ends of each brake pad and the wheel vehicle. If the feeler gauge cannot be inserted, it is qualified.
Special feeler gauge: thickness is 3-.cmm.
30. Tightening torque measurement of handlebar screw, handlebar joint screw, drum seat clamping bolt, frame rear joint bolt, middle axle lock nut (middle axle cup lock nut), front and rear wheels
Measure with a torque wrench with a range of 0 to 50 N·m. 31. Other requirements
Other technical requirements in the technical requirements are measured by hand feel and visual inspection. Additional remarks:
This standard is proposed by the China Light Industry Federation.
This standard is under the jurisdiction of the National Bicycle Standardization Technical Committee. This standard was drafted by the National Bicycle Standardization Center, the National Bicycle Quality Inspection Center, the Tianzhi Feihe Bicycle Case Creation Center, the Manzhou Jinjubai Bicycle Industry and Trade Group, the Shanghai Bicycle Factory, and the Shanghai Bicycle Factory No. 3 Qizhou Wuyang Bicycle Company. The main drafter of this standard is Chen Zhiyu.
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