Abstract:
An invention of a flatbed supporting device is composed of a horizontal plate, a hydraulic cylinder, a supporting device, a fixing holder, a first holder &amp; a second holder where the supporting device is made up of a steel connecting rod and a steel shaft being plugged into a hollow longitudinal casing pipe and a hollow lateral casing pip, which are welded on an assembled device and secured &amp; positioned to a hydraulic cylinder with plural bolts for enhancement of supporting strength and inhibition of breaks in usage.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    This new flatbed supporting device is an assistant tool used for reparation of motor vehicles in particular that enhance strength of a structure in usage and reduce costs and possibilities of unexpected accidents such as breaks or injuries. 
         [0003]    2. Description of the Prior Art 
         [0004]    For the purpose of maintaining a smooth driving and useable conditions of a motor vehicle, a regular maintenance for detailed inspections &amp; calibrations and necessary replacement or addition of components is indispensable for keeping an optimal situation of a motor vehicle. 
         [0005]    For the sake of simple reparation or maintenance of motor vehicles nowadays, a jack or a lift must be used for raising the vehicle. Furthermore, a lift employed for reparation or maintenance of motorcycles is made up of a platform, a scissor-type holder, a fixing holder, a hydraulic device, and a supporting device such as the platform support structure of the U.S. Pat. No. 6,345,693 that ensures ascending, descending, and location under sustaining weight of a motorcycle and provides convenient manners in reparation or maintenance for mechanics. 
         [0006]    In addition, a general flatbed supporting device has a supporting device that is welded with iron materials for sustaining a hydraulic cylinder and causes breaks and even damages in usage due to low-strength iron that is easily welded and has low costs; steel material with high strength but features of difficult welding and high costs is not an ideal choice in usage. With this perception, higher strength for a supporting device in usage and no potential break and injury for reduction in costs deserve to an inventor&#39;s further exploration. 
         [0007]    Hence, the inventor hopes to design a supporting device constructed via welding and screws for better strength and hardness by employing plural metals as base materials to link components together and installing plural bearings on both sides of the supporting device to assist slide of a scissor-type structure and reach a strong hardness and reduction in costs because of smooth ascending/descending and seldom breaks and damages. 
       SUMMARY OF THE INVENTION 
       [0008]    The major objective for this invention of a flatbed supporting device is to create a T-type iron-welded hollow assembled device that is engaged with a steel connecting rod and a steel shaft respectively and enhances strength of the moveable platform without bend, deformation, or breaks easily. 
         [0009]    The structure of the flatbed supporting device is made up of a horizontal plate, a hydraulic cylinder, a supporting device, a fixing holder, a first holder, and a second holder where the supporting device is assembled with components manufactured by different materials for reduction of costs, reinforcement of durable features, and prevention of injuries to users. Thus, features of this invention can completely match demands for a patent application. With an illustration of diagrams, the detailed description and technical content related to this invention is displayed as follows: 
       DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0010]    Above all, refer to the content shown in  FIG. 1  and  FIG. 2  simultaneously. As an assistant tool for reparation or maintenance of motor vehicles or motorcycles, the invention is a flatbed supporting device  1 , which is made up of a horizontal plate  10 , a hydraulic cylinder  11 , a supporting device  12 , a fixing holder  13 , a first holder  14 , and a second holder  15 . The horizontal plate  10  assembled with plural plates is equipped with a stationary barrier  101  at one end to sustain a motorcycle&#39;s wheels. As a buffer, the hydraulic cylinder  11  is equipped with plural positioning pins  111  placed in plural holes  1120  of a spacer  112  at one end and a connector  110  at another end for connection of the supporting device  12  that is a structure similar to a T-type rod-shaped object with plural bearings  123 ,  123 ′,  124 , and  124 ′, which can be moved along curved bulges  140  of the first holder  14  as well as curved bulges  150  of the second holder  15 , and with plural washers  125  and  125 ′ installed on two lateral ends blocked by C rings  126  &amp;  126 ′ and is connected to the hydraulic cylinder  11  with its longitudinal end. With a shape approximating to a Π-type rod, the fixing holder  13  has L-type lateral lugs  130  &amp;  130 ′, which are engaged to grooves  141  of the first holder  14  for fixing according to lifted heights. With a shape similar to a rectangle, the first holder  14  and the second holder  15  have shaft holes  144  &amp;  154  respectively for penetration of a shaft bar  155  to form an approximate scissor-type holder. For both holders, the first holder  14  has plural grooves  141  on one side plus curved bulges  140  on another side and a hole  142  at one end for penetration of a crossbar  143 , and the second holder  15  has curved bulges  150  on one side and is configured with plural wheels  151  &amp;  151 ′ and plural gaskets  152  &amp;  152 ′ fixed with C rings  153  &amp;  153 ′. After extension of the supporting device  12  via a function of the hydraulic cylinder  11 , plural bearings  123 ,  123 ′,  124 , and  124 ′ can be moved along bulges  140  of the first holder  14  &amp; bulges  150  of the second holder  15  to make the horizontal plate  10  shifted upward or downward and form the flatbed supporting device  1  by fixing the holder  13  at a necessary height corresponding to displacement. 
         [0011]    Refer to the content shown in  FIG. 3  and  FIG. 4 . The supporting device  12  has an assembled device  120  made up of a hollow longitudinal casing pipe  1201 , a hollow lateral casing pipe  1202  and plural supporting plates  1203  welded with iron materials and has a steel connecting rod  121  &amp; a steel shaft  122  for insertion of the longitudinal casing pipe  1201  &amp; the lateral casing pipe  1202  where plural holes  1210  &amp;  1210 ′ prepared at one end of the connecting rod  121  are corresponded to holes  12010  &amp;  12010 ′ on the longitudinal casing pipe  1201  for secure connection with screwed plural bolts  12011  &amp;  12011 ′. In addition, a shaft  122  has plural holes  1220  &amp;  1220 ′ perpendicularly drilled on its surface and corresponded to plural holes  12020  &amp;  12020 ′ on the lateral casing pipe  1202  for secure connection of screwed plural bolts  12021  and  12021 ′ and has grooves  1221  &amp;  1221 ′ on its both ends for installation of plural bearings  123 ,  123 ′,  124 , and  124 ′ and washers  125  &amp;  125 ′ fixed with C rings  126  &amp;  126 ′. 
         [0012]    For the sake of becoming a buffer for ascending/descending, one end of the connecting rod  121  inside the assembled supporting rod  12  is penetrated into the connector  110  of the hydraulic cylinder  11 ; the steel connecting rod  121  and the steel shaft  122  are securely inserted into the assembled device  120  for reinforcement of overall support and strength that makes further improvement compared with a known supporting device linked by iron materials with features of breaks, bend, and deformation easily. 
         [0013]    Refer to the content shown in  FIG. 5  and  FIG. 6 , which are views for movement of this invention of the new flatbed supporting device. With extension of the assembled device  120  via the hydraulic cylinder  11 , there is less force necessary for movement of the flatbed supporting device  1  in virtue of the assembled device  120  with the lateral casing pipe  1202  penetrated by the shaft  122  and with plural bearings  123 ,  123 ′,  124 , and  124 ′ as well as washers  125  &amp;  125 ′ fixed by C rings  126  &amp;  126 ′ along bulges  140  of the first holder  14  &amp; bulges  150  of the second holder  15  by using plural bearings  123 ,  123 ′,  124 , and  124 ′. 
         [0014]    Refer to the content shown in  FIG. 7  and  FIG. 8 , which are operational views of embodiment for the connecting rod or the shaft within the structure of this invention of the flatbed supporting device where the connecting rod  121  or the shaft  122  has holes  1210 ,  1210 ′,  1220 , and  1220 ′ (not shown in both figures but in  FIG. 3 ) for embodiment of penetration or has plural sockets  16  &amp;  16 ′ or plural screw holes  17  &amp;  17 ′ for employment of fixing with various styles of bolts. 
         [0015]    In light of the abovementioned descriptions, it is of course to be understood that the embodiment described herein is merely illustrative of the principles of the invention but not restricted to ambits for implementation of the invention. Furthermore, a wide variety of modifications thereto may be affected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
       [0016]      FIG. 1  is a three-dimensional view of the invention of the flatbed supporting device. 
         [0017]      FIG. 2  is a three-dimensional exploded view of the invention of the flatbed supporting device. 
         [0018]      FIG. 3  is an exploded view for the supporting device of the invention of the flatbed supporting device. 
         [0019]      FIG. 4  is a view for assembly of the invention of the flatbed supporting device. 
         [0020]      FIG. 5  is a view for movement of the invention of the flatbed supporting device. 
         [0021]      FIG. 6  is a vertical view of the supporting device of the invention of the flatbed supporting device. 
         [0022]      FIG. 7  is a view for embodiment of the connecting rod or the shaft of the invention of the flatbed supporting device. 
         [0023]      FIG. 8  is a view of another embodiment of the connecting rod or the shaft of the invention of the flatbed supporting device.