This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of bicycle frames (hereinafter referred to as "frames"). This standard applies to general bicycle frames specified in QB1714 "Bicycle Naming and Model Compilation Method". QB 1880-1993 Bicycle Frame QB1880-1993 Standard Download Decompression Password: www.bzxz.net

Industry Standard of the People's Republic of China
Bicycle Industry Standard
Published on January 6, 1994
Published on August 1, 1994
The Ministry of Light Industry of the People's Republic of China
1 Main Content and Scope of Application
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Industry Standard of the People's Republic of China
QB188093
Bicycle Frame
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, delivery, and insurance of bicycle frames (hereinafter referred to as bicycle frames).
This standard applies to bicycle frames specified in QB171 Bicycle Naming and Model Compilation Method, 1 Reference Standard
GB1157 Smoothness Limit Gauge
GB2828
GB2825
GB 3565
CB5577
GB12742
QB1221
Batch inspection counting oil sampling procedure and sampling table (applicable to inspection of continuous batches) Periodic inspection counting sampling procedure and sampling table (applicable to inspection of production process stability) Bicycle safety requirements
Bicycle wheel bearings
Bicycle testing equipment and apparatus technical parts Bicycle metric screw numbers and nut numbers
Bike imperial thread and gauges
QB/T1217
QB/T118Www.bzxZ.net
3 Terminology
3.1 Frame height
Bicycle electric mounting technical conditions
Bicycle paint leak technical parts
Bicycle frame height
The distance from the center of the center joint to the rear handle or the front end of the seat tube. 3.2 The center reference plane of the frame is the center distance between the front tube, the upper tube, the seat tube and the lower tube. 3.3 The height of the frame is adjusted to the maximum position (that is, the seat tube is at the safety mark line). 4 Product classification 4.1 Classification, name and code 4.1.1 Classification by purpose (Table 1) Ministry of Light Industry of the People's Republic of China 1994 (106th batch 19940801 Culture and Tourism Classification of objects of use General vehicle frame Light vehicle model Technical requirements for retrograde type QH1880-93 || Yong-style car channel: North number is M. Example see picture! .1-front camp: 2-- business 3-upper heat head 11-! Common learning: 5 upper storage 16-connection: 7-tube: 8-down report buy please garbage: 12 down open:: 1 room every 12-stand support: 13-stand small, etc., 1-middle head: 1: fork: 164 fork small tube 417-flat piece k
QB1880-93
women's car first: code fire W example visibility 23. uiKAoNiKAca
1-front general 12. Trademark: 3U shape Xu: ·-drum sound industry ring 5-acid tube 6-stand small version 17 stand 8-flat connection 49-half fork 110-almost small board: 11 floor: 12-down report board: 13-upper reinforcement board B180-9 3
1 front 12 trademark 3 upper head: 4 upper: 5. indirect joint 1E one tube, 7 one store joint; 8-saddle pipe; 1-vertical 2: 10-vertical small plate 11-half rocker: 12-flat 2: 13-half 2 small bottle, 14-middle delivery, 15-lower tube, 16-lower grab head 3
4.2 Specifications
42.1 Specification cutting method
The specifications of the bicycle frame are expressed by the true diameter D of the rear wheel to be matched and the frame height H. That is, DXH. See Figure 4, Figure
shows the system: Assume that the rear wheel diameter of a certain bicycle is 665mm, and the height is 51cm, then its specifications are: 660×510. 4.3.2 Frame size
-iiKAo The height of the NiKAca bicycle frame is selected within the range of 305-6A5mm, and the last digit is recommended to be an integer of 5 minus 0.
4.3 Marking example
Ordinary (type) men's adult frame (M) PM7X510Q1880 with a rear wheel height of 710mm and a frame height of 510mm
4.4 Assembly dimensions
The assembly dimensions of the bicycle and other components shall meet the following requirements 4.4. Front bracket
See Table 2,
4.4.2 Middle joint
Apply to the lower A-type middle shaft, see Figure 5.
81860-93
4. 4.2.2 Suitable for HB and D type center shafts, see Figure 7 and Table 3. Figure M3UX1--E1-575-24 6[B1. 375 24 6H: The center joint uniformity level is 15 and 11 is preferred. 4.4.3 Flat fork. See Figure 3 and Table 1: 1) First, soften the layer, 58″, 12, and then open the female joint opening, see Figure 0.
Front opening, see Figure 10
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4. 4. 5 Rear joint, point kidney chaos and comparison, see Figure 11, use 12 and Table 5.2±,
Specimen quality special mark: three
4.4.6 Rear axle main shape brake installation position stomach distance, see Figure 13 transmission center
Number reverse safety mark
Or: L
QR1880-93
1.=1/2(DE)+H
The distance from the center line of the rear axle to the center of the clamp-type measuring hole: D. Wheel diameter (according to CB3=77)
E—: Wheel runner height (according to GB3SY regulations\; H:——Clamp-type brake installation height (according to QA/T17)). S Technical requirements
The following assembly dimensions and public welfare shall comply with the provisions of 4.4. Two normal holes of the vehicle 31,
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Two sieve holes of the middle joint 4*, M×1—GTT.S--21-5Hb.
Width of the joint G8Js15.723a1
S.1 Saddle pipe safety mark
The drum section should have a safety mark line, and its requirements shall comply with the provisions of G3555: 2.2. The length of the safety line shall not be less than half of the circumference,
5.3 5.3.1 Parallelism of frame seat tube
The axis of frame seat tube should be aligned with the center of frame. The standard value is within 1,3mm. 15.3.2 Parallelism of frame seat tube
The horizontal and vertical support of frame should be aligned with the center reference plane of frame. The standard value is 611115.3.3 Verticality of fork opening
The line of the opening of left fork joint of frame should be aligned with the center reference plane of frame. The standard blood is vertical, and the difference is 1.2mm. 5.3.4 The vertical point in the frame is changed according to the proposal. The axis of the joint in the plastic should be perpendicular to the center reference plane of the frame. The standard value for the load-bearing, ordinary and light frames is 2mm. The tolerance value of the optional channel is: .5mm: 5.3.5 The tolerance of the upper, lower and vertical tubes of the frame. The tolerance of the upper tube, lower tube and seat tube of the frame is imm within oorn. 5.4 Strength
5.4.1 Static lateral load capacity of heavy-duty frame: The static load for horizontal and vertical positions is 450N. After [m, the permanent deformation of the frame shall not be less than sru.5.4.2 Frame vibration
The front assembly of the vehicle shall be installed in accordance with the requirements of 14 and Table 1, and subjected to a vertical vibration test on a special vibration test machine. Within the indicated number of vibrations, no part of the vehicle shall be damaged, deformed or loose. 5.4.3 Frame drop impact strength OR18803 Seat position Center axis The impact strength of the frame shall comply with GB3565 Section 7: 5.4.4 Fast section attenuation test After the pipe and frame are tightened: It should be able to withstand 22V horizontal without village rotation effect, ss single continuous frame Detailed parts should meet the requirements of Q/T1318 Class I parts. 5.1 Appearance of film should meet the requirements of QB/T1213 Section 4.1 and Section 4.1.2. 5.5.2 The strength of paint lock should meet the requirements of QHR/1218 Section 4.2. 5.5.3 The anti-memory ability of film should meet the requirements of QT/T1218 Section 4.3. 5.5.4 The magnetic property of film should meet the requirements of QB/T1218 Section 1., the system of the tile, 5.6 electrical
special parts should meet the relevant requirements of the protection of the 217, the speed of the Liu
5.6-1 amine chain design should meet the "price" type of pigeon road parts "cost requirements, teaching and expansion parts should meet the "type of plated parts" requirements, 10
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5.6.2 fasteners should meet the "type chrome parts" requirements, zinc fasteners should meet the "type zinc" requirements 5.7 appearance
5.7.1 beam parts shall not have sharp edges, burrs 5.7-2 car outer surface six open and bright damage, with damage. pressure science welcome phenomenon. 5. 7. 3
The vehicle should be flat before pasting, and there should be no obvious wrinkles, ridges, large accumulations, hops, scattered flowers, bubbles, etc. The trademark should be firmly and straight.
57.5 The hard printing and code and inlay of the frame should be clean. 6 Test method
The source equipment and the subsequent degree of the method should be consistent (H12742 regulations, 6.1 Size
0, 4, special pressure measurement, special volume remaining record A (supplement) a.
M55×1—6H.B1.375-21--51 Use special frequency measurement, deep comparison measurement QB1223 and Q1331 regulations
joint width and tolerance vernier caliper measurement. 6.2 Safety line, length with day, height with vernier caliper measurement, 6-3 inspection test
6.3.1 This article sees
<.3.1.1 Select the shim, make the frame center reference and parallel to the horizontal 1.3.1.2 As shown in Figure 1, for the frame height of 542m, measure ". The two numbers are placed in the hall 8 for the year. The result is parallel reading error,
6-3.1.315 nearly shows, for [4(mm, E. The difference between the two ends of the car is 15
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