Patent Publication Number: US-2010116113-A1

Title: Quick-assembly/disassembly mechanism of sawblade cover

Description:
BACKGROUND OF INVENTION 
     (1) Field of the Invention 
     The present invention relates generally to a -quick-assembly/disassembly mechanism of sawblade cover, and more particularly to an innovative one which enables quick disassembly of the cover by a mobile damper during operation, where necessary, and also quick positioning prior to operation, thereby improving the efficiency of the wood sawing machines. 
     (2) Description of The Prior Art 
     The sawing machine is a widely used machine for woodworking. Thanks to its advantages of high strength and adjustability of height, the saw blade can be applied to saw any kind of timber. But, the saw blade must be maintained or replaced frequently during continuous processing, especially when the saw blade is covered with sawdust. Otherwise, the sawing efficiency of saw blade will be adversely affected, thus leading to rapid tear-and-wear. 
     Whenever the saw blade is maintained or replaced, the shield of saw blade must be firstly dismantled, and then reassembled and fixed, which will spend more time and affect the efficiency, and also bring about safety hazard of operators, making it necessary for improvement. 
     SUMMARY OF THE INVENTION 
     The inventor has developed and improved the present invention to meet the requirements for maintenance and replacement of sawblades of wood sawing machines. While a mobile damper is installed within the supporting rod of the cover, a quick-disassembly poker is operated to be lifted and pressed down easily based on the screwing or releasing characteristic of a nut, such that the efficiency of entire cover can be improved quickly in relation to the disassembly and positioning of the support frame. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows an assembly view of the wood sawing machine and cover assembly of the present invention. 
         FIG. 2  shows an assembly status view of the cover assembly of the present invention. 
         FIG. 3  shows an exploded perspective view of the cover assembly of the present invention. 
         FIG. 4  shows a schematic view of the present invention that the supporting rod is mated with the support frame. 
         FIG. 5  shows a schematic view of the mobile damper of the present invention when tightened. 
         FIG. 6  shows a schematic view of the present invention that the supporting rod is disengaged from the support frame. 
         FIG. 7  shows a schematic view of the mobile damper of the present invention when released. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings. 
     Referring to FIG.  1 —assembly view of the wood sawing machine and cover assembly, wherein the wood sawing machine  10  allows a set of sawblade  12  to be placed in the preset saw cut  11  of the sawing machine; and a fixed support frame  13  is arranged at rear side of the sawblade  12 ; notched grooves  14 ,  15  for mating with the cover assembly  20  are formed at the upper side of the support frame  13 . 
     Referring also to  FIGS. 2 ,  3 , the cover assembly  20  comprises a U-shaped supporting rod  21 , two shields  22 ,  23  at both sides and two stoppers  24 ,  25  at rear side of the shield; with this design, the shields  22 ,  23  for protecting the personal safety and the stoppers  24 ,  25  for preventing the setback force occurred during sawing process are integrally combined with the supporting rod  21 . 
     In the U-shaped space, the supporting rod  21  allows to install a clamping block  26  with downward gripping mouth and a mobile damper  30  correspondingly to the notched grooves  14 ,  15  on the support frame  13 ; the mobile damper  30  is screwed onto the supporting rod  21  via a bolt  32 , and coupled securely with a bearer  34  at the other end; in the U-shaped space of the supporting rod  21 , the bolt  32  is mated with a nut  33  and a quick-disassembly poker  31 , of which the quick-disassembly poker  31  is mated with the bolt via a spiral portion  312 , and a poking rod  311  is protruded from the spiral portion  312  until reaching the exterior of the through-hole  27  of the supporting rod  21 . 
     Referring also to  FIGS. 4 ,  5 , of which,  FIG. 5  is the AA cross-sectional view of  FIG. 4 , when the cover assembly  20  is mated with the support frame  13 , the clamping block  26  is locked in the rear notched groove  14  of the support frame  13 , and the bolt  32  locked in the front notched groove  15  of the support frame  13 ; in such case, the front notched groove  15  is placed between the quick-disassembly poker  31  and nut  33 ; by pressing down the poking rod  311  of the quick-disassembly poker  31 , the spiral portion  312  is screwed inwards via the screw thread of the bolt  32 , so as to clamp the upper notched groove  15  of the support frame  13 . In this way, the cover assembly comprising supporting rod  21 , shields  22 ,  23 , and stoppers  24 ,  25  are fixed on the wood sawing machine. 
     Referring also to  FIGS. 6 ,  7 , of which,  FIG. 7  is the AA cross-sectional view of  FIG. 6 , if the poking rod  311  of the quick-disassembly poker  31  is pulled upwards, the spiral portion  312  is disengaged outwards, thus releasing the clamping force against the notched groove  15  of the support frame  13 ; so, the operator may remove easily the entire cover assembly comprising the shields  22 ,  23  and stoppers  24 ,  25 , along with the supporting rod  21 . 
     Thus, the shields  22 ,  23  and stoppers  24 ,  25  of the cover assembly are prefabricated onto a U-shaped supporting rod  21 ; a clamping block  26  and a mobile damper  30  are mated with or disengaged from the support frame  13  on the wood sawing machine, so that the entire cover assembly can be disassembled and positioned easily by the quick-disassembly poker  31 , helping to improve the working efficiency and guaranteeing greatly the personal safety.