Folding bicycle

Folding bicycle

  • CN 2,306,940 Y
  • Filed: 07/03/1997
  • Issued: 02/10/1999
  • Est. Priority Date: 07/03/1997
  • Status: Active Grant
First Claim
Patent Images

1. , a kind of folding bicycle, comprise handlebar (7), front-wheel (10), trailing wheel (9), vehicle seat (8), vehicle frame pedal (17) and sprocket wheel chain (18), it is characterized by vehicle frame by put the beams in place (11), underbeam (13), front pillar (14), rear pillar (15), front fork (16) and back vent (12) are formed, upper beam (11) connects with front pillar (14), underbeam (13) connects with front pillar (14), underbeam (13) connects with rear pillar (15), put the beams in place (11), back vent (12) connects with rear pillar (15), underbeam (13) be live axle connecting of back vent (12) and connect, back vent (12) is made up of on the branch two bars, following two section (25,26), last, following two section (25,26) connection place is a spring self-locking unitor, this spring self-locking unitor is a welding Rectangle self-locked adapter plate (23) between the two bars in the upper end of back vent (12) hypomere (26), self-locking adapter plate (a 23) left side, the two bar circumference crimps in right two edges, form back vent positioning groove (22), self-locking adapter plate (23) has a bearing pin that laterally runs through (21), go up the stage clip (24) of a compressive state of cover at bearing pin (21), there is pin shaft hole the two bars of back vent (12) epimere (25) lower end, make the two bars in back vent (12) upper end be enclosed within the two ends of bearing pin (21) by this pin shaft hole, the elastic force of stage clip (24) abuts against two bars on the two bars of hypomere (26) of back vent (12), the upper end of self-locking adapter plate (23) is to the inside crimp, the right and left of the two ends of crimp and self-locking adapter plate (23) leaves neutral, this neutral and back vent positioning groove (22) connect, the size of back vent positioning groove (22) is bigger slightly than the diameter of the two bars of back vent (12) epimere (25), upper beam (11) the end vertical direction that connects with front pillar (14) is welded with short tube (27), the tube core (28) of band eccentric pin axis hole is housed in short tube (27), tube core (28) can rotate in short tube (27), the line of centers of eccentric pin axis hole (29) is 5-15mm with the distance of the line of centers (30) of short tube, upper beam (11) is 1 with the ratio of back vent (12) length:

  • 1.0-1.2, back vent (12) epimere (25) is 1.35-1.75 with the ratio of back rest hypomere (26);

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