Abstract:
This is to the search for the way to hold the gas containers on the carrier of vehicles and to create the parts suitable for actual use and meet the auto parts manufacturing standard while emphasizing on the worthiness, strength and safety.

Description:
FIELD OF THE INVENTION  
       [0001]    The invention is in the field of Engineering relating to a CNG (Complied Natural Gas) cylinder mounting device for a vehicle. 
       BACKGROUND OF THE INVENTION 
       [0002]    A structure for holding a CNG cylinder mounting device for a vehicle should be strong and able to hold the gas cylinder securely, preventing the movement or the slide ability there of when the vehicle is running. However, the typical mounting device for the CNG cylinder for a vehicle installed on the bed is provided with a structure comprised of angle bars. Such structure exhibits a rather lower strength under the weight of a 98-kg gas cylinder apart from the force from many directions when the vehicle runs. Therefore the disadvantages of such structure include a shorter lifetime and a possible loosened valve installed at the gas cylinder head, causing the leakage of the gas. 
       SUMMARY AND OBJECTS OF THE INVENTION 
       [0003]    The mounting device tor the CNG cylinder installed on the bed of a vehicle recording to the present invention is characterized in that the structure is mainly made of flat metal plates and molded-to-shape metal whereas there are provided the upper and the lower cylinder fastening belts; a cylinder supporting frame unit comprising a belt supporting plate, a bracket, a cylinder placement frame, a front frame locking bracket, a rear frame locking bracket, an auxiliary bracket as well as other element parts besides metal work pieces including a cylinder placement frame sleeve, a bracket supporting sleeve, a upper cylinder fastening belt supporting rubber, a lower cylinder fastening belt supporting rubber. All of these parts will be assembled together with bolts, nuts or by moans of fixing. 
         [0004]    The object of the present invention is to develop a strong structure of a CNG cylinder mounting device in order to reduce the problem concerning the gas cylinder body frame whereas a strong structure of a CNG cylinder mounting device is invented to eliminate the problem concerning the gas cylinder body frame by making the mounting device for the gas cylinder and the bed frame mounting device strong and secure as if the mounting device for the CNG cylinder is part of the vehicle structure. 
       DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0005]    According to  FIG. 1 , it illustrates the structure of a bed floor  1  under the bed floor of the vehicle comprising a front transverse frame  12 , a rear transverse frame  13 , a left-side frame  14 , and a right-side frame. All of these parts will be assembled together by means of fixing at the location for installing the mounting device for the CNG cylinder on the bed according to the present invention whereas the front transverse frame  12  is provided at the front of the vehicle near the cab (not shown in the figure); the rear transverse frame  13  is placed next from the front transverse frame  12  to the rear of the vehicle body (not shown in the figure); the left-side frame  14  is placed on the left parallel to the vehicle body (not shown in the figure); and the right-side frame  15  is placed on the right parallel to the vehicle body  15  (not shown in the figure). 
         [0006]    According to  FIG. 2 , it illustrates a gas cylinder supporting frame unit  2  comprising a cylinder placement frame bracket  18  having a feature of a plate with folded angle wings whereas on the base of the work piece, there are provided four holes for the bolts  61  to go through. Also provided are two cylinder supporting plates  17  sandwiching the cylinder placement frame bracket  18  vertically to support the gas cylinder  70  (not shown in the figure). On the top, there is provided the lower cylinder fastening belt  16  having a feature of an arched steel bar to relation to the radius of the curve of the gas cylinder  70  whereas both ends thereof will be folded orthogonally and have one bolt through hole  62  on each end. At each of the hole mouths, there is provided a spot nut  51  fixed below the lower cylinder fastening belt  16 . By means of fixing, the cylinder placement frame bracket  18 , the cylinder supporting plate  17 , the lower cylinder fastening belt  16  and spot nuts  51  are assembled together to provide the gas cylinder supporting frame unit  3  whereas two gas cylinder supporting frame units  2  are required to assembled to make the mounting device for the CNG cylinder for a vehicle according to the present invention. 
         [0007]    According to  FIG. 3 , it illustrates parts assembled with the bed frame  1 . Prior to the installation of the mounting device for the CNG cylinder for a vehicle according to the present invention, it&#39;s required to locate the positions of the fixing holes for the gas cylinder supporting frame unit  2  whereas it is necessary to layout the locations of eight through holes on the bed floor  11  wherein the locations of thereof are divided into four spots, each of which has two holes: two holes on the left side of the front transverse frame  12  and another two holes of the right side thereof, and two holes on the left side of the rear transverse frame  13  and another two holes on the right side thereof. The size of the holes on the bed floor  11  has to be slightly larger than that of the bracket supporting sleeve  21  to allow the said bracket supporting sleeve  21  to be put into the holes. The bolt through holes  61  are made concentrically with the through holes on the bed floor  11  on the front transverse frame  12  and the rear transverse frame  13  in a total of 8 spots. 
         [0008]    To assemble the gas cylinder supporting frame unit  2  with the bed floor frame unit  1 , the eight bracket supporting sleeves  21  are inserted into the holes on the bed floor  11  whereas upon the insertion, the base of the four bracket supporting sleeves  21  is placed into the U shaped groove of the front transverse frame  12  and that of another four sleeves is placed into that of the rear transverse frame  13  whereas the upper edges of the bracket supporting sleeves  21  are slightly above the bed floor  11 . The bed supporting bracket  20  featuring four plates  61  having two bolt through holes each and folded angle wings is placed on the bed floor  11  at the corresponding four fixing spots whereas the positions of the bolt through holes  61  are aligned with that of the bracket supporting sleeves  21 . The bed supporting bracket  20  acts as a cylinder supporting frame sleeves support  19  preventing the weight of the CNG cylinder mounting device unit according to the present invention installed on the bed floor  11  from directly pressing upon the bed floor  11 . The eight cylinder placement frame supporting sleeves  19  are placed on the bed supporting bracket  20  whereas the positions of the bolt through holes  61  of the cylinder placement frame supporting sleeve  19  and the bed supporting bracket  20  are aligned. The two gas cylinder supporting frame unit  2  as assembled in  FIG. 2  are placed upon the cylinder placement frame supporting sleeves  19  whereas the positions of the bolt through holes  61  of the cylinder placement frame bracket  18  are aligned with the bolt through holes  61  of the cylinder placement supporting sleeves  19 . 
         [0009]    To assemble the front frame locking bracket  22  featuring a long steel plate folded to form a U shaped groove, on the base of the U shaped groove, there are provided four bolt through holes in the same interval of the through holes on the front transverse frame  12 . Four spot nuts are individually fixed at the four holes under the groove. The frost frame locking bracket is assembled with the bottom of the front transverse frame  12  whereas the positions of the bolt through holes  61  of the front frame locking bracket  22  and the front transverse frame  12  are aligned correspondingly. The four bolts  61  are inserted into the through holes on the cylinder placement frame bracket  18 , the cylinder placement frame supporting sleeves  19 , the bed supporting bracket  20 , the bracket supporting sleeve  21 , the front transverse frame  12 , and the front frame locking bracket  22 . Then the bolts are tightened to the four spot nuts  52  fixed under the front frame bracket  22 . Thereafter, two of the rear frame locking brackets  23  having a similar feature to the front frame locking bracket  22  but shorter and having only two belt through holes  61  are assembled with the bottom of the roar transverse frame  13  on both left and right sides whereas the two bolt through holes  61  on the rear frame locking bracket  23  are aligned with the bolt through holes  61  of the rear frame bracket  13 . The four bolts  61  are inserted into the bolt through holes on the cylinder placement frame bracket  18 , the cylinder placement frame sleeves  19 , the bed supporting bracket  20 , the bracket supporting sleeves  21 , the rear transverse frame  13  and the rear frame locking bracket  23 . Then the bolts are tightened to the four spot nuts  52  fixed under the rear frame bracket  23 . 
         [0010]    According to  FIG. 4 , it illustrates the assembly of the gas cylinder  70  with the CNG cylinder mounting device unit for a vehicle according to the present invention including two lower cylinder fastening belt supporting rubber  24  assembled with the lower cylinder fastening belt  16  on both sides. The gas cylinder  70  is placed upon the lower cylinder fastening belt  16  assembled with the lower belt supporting rubber  24 . Then the upper cylinder fastening belt  27  is assembled with the upper belt supporting rubber  25 . Thereafter, the assembled unit is placed over the gas cylinder  70 . The bolts  62  are inserted into the bolt through holes  62  on the upper cylinder fastening belt  27  and the lower cylinder fastening belt  16  and tightened to the spot nuts  51  fixed to the bottom of the lower cylinder fastening belt  16 . The bolt  63  is inserted into the bolt through holes  63  on the auxiliary bracket  26  as a reinforcing unit for the upper cylinder fastening bolt flange  27 . Later the anti-loosening looking nuts  53  ant tightened to the bolts  63  to the highest level and then the bolts  63  are pushed into the through holes on the lower cylinder fastening belt  16  before tightening them with the spot nuts  51  (not shown in the figure) fixed at the bottom of the lower cylinder fastening bolt flange  16 . Upon tightening, the anti-loosening locking nuts  53  are tightened compressively to the upper flange of the lower cylinder fastening belt  16  to prevent the bolts  63  from being loosened. 
         [0011]    According to  FIG. 5 , it illustrates the back of the CNG cylinder mounting device for a vehicle according to the present invention upon the installation on the bed floor  11 . 
         [0012]    According to  FIG. 6 , it illustrates the front of the CNG cylinder mounting device for a vehicle according to the present invention upon the installation on the bed floor  11 . 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0013]      FIG. 1  illustrates a specific area of the frame unit and the bed floor for the installation of a CNG cylinder mounting device for a vehicle according to the present invention; 
           [0014]      FIG. 2  illustrates parts of the gas cylinder, supporting frame unit located in the CNG cylinder mounting device for a vehicle according to the present invention; 
           [0015]      FIG. 3  illustrates parts assemble with the bed frame body and the bed floor of the CNG cylinder mounting device for a vehicle according to the present invention; 
           [0016]      FIG. 4  illustrates the side view of the parts used to assemble the gas cylinder with the CNG cylinder mounting device for a vehicle according to the present invention; 
           [0017]      FIG. 5  illustrates the rear view of the complete installation of the CNG cylinder mounting device for a vehicle according to the present invention; and 
           [0018]      FIG. 5  illustrates the front view of the complete installation of the CNG cylinder mounting device for a vehicle according to the present invention. 
       
    
    
     THE BEST MODE OF THE INVENTION 
       [0019]    As some as aforementioned in the Detailed Description of the Preferred Embodiments topic.