Adjustable bicycle racks

Abstract

A bicycle rack includes a base connected to a transverse bar of a rod on the vehicles. An adjustable member has a lower part with an open bottom and the adjustable member is inserted in a chamber defined in a rear of the base. A spring member is received in the lower part and connects the lower part to two sidewalls of the chamber. A pull member is connected to the adjustable member and hooked to the spring member. A cover member is pivotably connected to the adjustable member so as to clamp bicycle frames between the cover member and the base. A fastening device is pivotably connected to a front of the base and the cover member is connected to the fastening device. The cover member can be pivoted to pull the pull member to pull the spring member so as to adjust the adjustable member relative to the base. By this way, the distance between the cover member and the base can be adjusted.

1 . A bicycle rack comprising: 
 a base having a passage defined in a lower part thereof which is adapted to be connected to a transverse bar of a rod, a V-shaped clamping recess defined in a top of the base and a chamber defined in a rear of the base;    an adjustable member having a lower part which includes an open bottom and is inserted in the chamber, a spring member received in the lower part and connecting the lower part to two sidewalls of the chamber, a pull member connected to the adjustable member and hooked to the spring member so as to adjust the adjustable member within the chamber;    a cover member having a recess defined in an underside thereof and the cover member pivotably connected to the adjustable member, and    a fastening device pivotably connected to a front of the base and the cover member connected to the fastening device, the cover member being pivoted to pull the pull member to pull the spring member so as to adjust the adjustable member relative to the base.    
   
   
       2 . The bicycle rack as claimed in  claim 1 , wherein the adjustable member has a pivot portion on a top thereof and an opening is defined between an inside of the lower part and the pivot portion, the pull member movably inserted in the opening.  
   
   
       3 . The bicycle rack as claimed in  claim 1 , wherein the pull member is an L-shaped member and includes an elongated section and a bent section which hooks the spring member.  
   
   
       4 . The bicycle rack as claimed in  claim 2 , wherein the pull member includes an overlapped section and a lower end of the overlapped section contacts a periphery defining the opening.  
   
   
       5 . The bicycle rack as claimed in  claim 3  further comprising a cap is connected to a top of the elongated section of the pull member.  
   
   
       6 . The bicycle rack as claimed in  claim 1 , wherein the lower part includes a concave defined in an inside thereof and an elongated groove is defined in an inside of the chamber, a ridge extends from an inside of the elongated groove, the ridge is engaged with the concave to prevent the lower part from disengaging from the chamber.  
   
   
       7 . The bicycle rack as claimed in  claim 1 , wherein a central slot is defined in an inside of the clamping recess and in communication with the passage of the base, a set of pressing plates is inserted in the central slot.  
   
   
       8 . The bicycle rack as claimed in  claim 7 , wherein the set of pressing plates includes a first pressing plate which includes two lugs on two ends thereof and the first pressing plate is fixed across the central slot, a second pressing plate overlaps on the first pressing plate, each of the first and second pressing plates includes a curve portion and teeth defined in an edge of the curve portions, the teeth are located corresponding to the axial grooves defined in an inside of the passage so as to press a positioning piece which is adapted to be connected to an outside of the transverse bar.