Patent Publication Number: US-11648652-B2

Title: Nailing depth adjustable air nail gun

Description:
BACKGROUND OF INVENTION 
     1. Field of the Invention 
     The present invention relates generally to an air nail gun, and more particularly to a nailing depth adjustable air nail gun. 
     2. Description of Related Art 
     The pneumatic nail gun is also known as pneumatic nailing machine. The air nail gun uses the high pressure gas generated by the air pump (air compressor) to drive the striker in the nail gun cylinder to perform hammering motion, driving the row nail from the row nail clip into the object or shooting the row nail out. 
     In nailing operation, different nailing depths are sometimes required in actual operating environment. The existing pneumatic nail gun adjusts the distance from the safety rack end to the gun muzzle by adjusting the adjusting screw, so as to implement the adjustment of nailing depth. However, the pneumatic gun vibrates in operation, the impact force generated by the vibration drives the adjusting screw to rotate, so that the distance from the safety rack end to the gun muzzle deviates, the nailing depth is changed, failing to achieve the intended effect, it shall be adjusted continuously by hand, taking time and labor. 
     SUMMARY OF THE INVENTION 
     Considering the insufficient background technology, the problem to be solved by the present invention is to provide a nailing depth adjustable air nail gun, the air nail gun can control the nailing depth accurately, preventing the rotation of adjusting screw from shifting the nailing depth in the course of operation. 
     The present invention is completed by using the following technical proposal. A nailing depth adjustable air nail gun, including a gun head, a gun body, a clip device, a safety rack installed on the gun head, an adjusting mechanism and a trigger gear. The safety rack end has a circular tube, the circular tube is fitted over the gun muzzle of gun head. The adjusting mechanism comprises a locating pin and an adjusting screw. The locating pin is installed on one side of gun head. The adjusting screw is screwed to the gun body and vertically movable. The adjusting screw is located at the upper end of locating pin. The bottom of adjusting screw contacts the upper end of locating pin. The adjusting screw comprises a shaft and a head. A regulating wheel is fixed to the shaft. A pressure spring is arranged between the regulating wheel and gun body, the pressure spring is fitted over the shaft. The gun head is provided with a limiting base corresponding to the regulating wheel. The limiting base has a strip bulge extending towards the regulating wheel. Multiple strip slots fitting the strip bulge are uniformly distributed on the outer wall of the regulating wheel. The strip bulge is stuck in the strip slot. 
     In the present invention, the screw is rotated, and then the distance from the circular tube of safety rack to the gun muzzle of gun head is adjusted by the locating pin, so as to adjust the nailing depth of air nail gun. The strip bulge of limiting base is stuck in the strip slot of regulating wheel, preventing the adjusting screw from shifting in the course of operation, the distance between the gun muzzle and safety rack is controlled accurately, preventing the impact force generated in the nailing process rotating the adjusting screw, avoiding the nailing depth shifting in operation, the positioning is more accurate, the operator does not need to make adjustments frequently. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a structural representation of a nailing depth adjustable air nail gun in the present invention; 
         FIG.  2    is a structural representation of another viewing surface of a nailing depth adjustable air nail gun in  FIG.  1   ; 
         FIG.  3    is a structural representation of Part A of a nailing depth adjustable air nail gun in  FIG.  1   ; 
         FIG.  4    is a structural representation of limiting base of a nailing depth adjustable air nail gun in  FIG.  1   ; 
         FIG.  5    is a structural representation of another viewing surface of a nailing depth adjustable air nail gun in  FIG.  4   ; 
         FIG.  6    is a structural representation of regulating wheel of a nailing depth adjustable air nail gun in  FIG.  1   . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The detailed description is given below according to attached figures. 
     As shown in  FIG.  1   ,  FIG.  2   ,  FIG.  3   ,  FIG.  4   ,  FIG.  5    and  FIG.  6   , the present invention provides a nailing depth adjustable air nail gun, including a gun head  1 , a gun body  2 , a clip device  3 , a safety rack  4  installed on the gun head, an adjusting mechanism and a trigger gear  5 . There is a circular tube  6  at the end of the safety rack  4 . The circular tube  6  is fitted over the muzzle of gun head  1 . The adjusting mechanism comprises a locating pin  7  and an adjusting screw  8 . The locating pin  7  is installed on one side of gun head  1 . The adjusting screw  8  is screwed to the gun body  2  and vertically movable. The adjusting screw  8  is located at the upper end of locating pin  7 . The bottom of adjusting screw  8  contacts the upper end of locating pin  7 . 
     The adjusting screw  8  comprises a shaft  9  and a head  10 . The head  10  always props the upper end of locating pin  7 . A regulating wheel  11  is fixed to the shaft  9 . Elastic material is preferred for the regulating wheel  11 . There is a pressure spring  12  between regulating wheel  11  and gun body  2 . The pressure spring  12  is fitted over the shaft  9 . The gun head  1  is provided with a limiting base  13  corresponding to the regulating wheel  11 . The limiting base  13  comprises a vertical part  14  and a horizontal part  15 . The vertical part  14  is fixed to the sidewall of gun head  1 , and the horizontal part  15  is fixed to the gun body  2 . The horizontal part  15  is provided with a through hole  16  corresponding to the adjusting screw. The shaft  9  of adjusting screw is screwed to the gun body  2  through the through hole  16 . The lower surface of through hole  16  of the horizontal part has an annular flange  17 , the pressure spring  12  is stuck in between horizontal part  15  and regulating wheel  11 . The top end of pressure spring  12  is fitted over the annular flange  17 . The vertical part comprises a middle part  18  and two side edges  19 , the two side edges  19  are arranged on both sides of middle part  18  respectively. The side edge  19  is cambered, the cambered surface of side edge  19  abuts on the lateral surface of gun head  1 . The limiting base  13  has a strip bulge  20  extending towards the regulating wheel. The top diameter of the strip bulge  20  is smaller than the bottom width. The top of the strip bulge  20  is a cambered surface. The strip bulge  20  is located in the middle part  18 . Multiple strip slots  21  matching the strip bulge  20  are uniformly distributed on the outer wall of the regulating wheel  11 . The strip bulge  20  is stuck in the strip slot  21 . 
     The adjusting screw  8  of the pneumatic gun is rotated, and then the distance from the circular tube  6  of safety rack to the muzzle of gun head is adjusted by the locating pin  7 , so as to adjust the nailing depth of air nail gun. The strip bulge  20  of limiting base is stuck in the strip slot  21  of regulating wheel, preventing the adjusting screw from shifting in the course of operation, the distance between the muzzle and safety rack is controlled accurately, preventing the impact force generated in the nailing process rotating the adjusting screw, avoiding the nailing depth shifting in operation, the positioning is more accurate, the operator does not need to make adjustments frequently.