Patent Publication Number: US-2021187694-A1

Title: Wheel grinder

Description:
FIELD OF THE INVENTION 
     The present invention relates to a wheel grinder in which a movable adjustment portion is adjustable so that the wheel grinder grinds a workpiece accurately. 
     BACKGROUND OF THE INVENTION 
     A conventional wheel grinder contains an operation portion and a work table fixed parallel to the operation portion, but they cannot grind a workpiece arcuately because a working error occurs. Thus, it is necessary to provide a movable adjustment portion onto the conventional wheel grinder. 
     The present invention has arisen to mitigate and/or obviate the afore-described disadvantages. 
     SUMMARY OF THE INVENTION 
     The primary aspect of the present invention is to provide a wheel grinder in which a movable adjustment portion is adjustable so that the wheel grinder grinds a workpiece accurately. 
     Another aspect of the present invention is to provide a wheel grinder which contains a stop cover so that after the wheel grinder grinds the workpiece to produce grinding dusts, the grinding dusts are collected inside the defining plate of the stop cover so as to be drawn out of the wheel grinder via the opening of the stop cover. 
     To obtain above-mentioned aspects, a wheel grinder provided by the present invention contains: a body, a work table, a vertical limitation frame connected on a rear side of the work table, a movable adjustment portion configured to move vertically and accommodated in the vertical limitation frame, a grinding wheel portion extending outward from a front side of the movable adjustment portion, and a motor fixed on a rear side of the movable adjustment portion. 
     The vertical limitation frame has two fixing holders arranged on two sides of a bottom of the vertical limitation frame respectively, two mountings locked beside the two fixing holders respectively, and two first screw rods and two second screw rods which are inserted through the two mountings respectively and abut against a bottom of the movable adjustment portion. 
     In addition, a stop cover is covered on the grinding wheel portion and includes a defining plate configured to define a connection shaft and an opening inside the defining plate. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view showing the assembly of a wheel grinder according to a preferred embodiment of the present invention. 
         FIG. 2  is another perspective view showing the assembly of the wheel grinder according to the preferred embodiment of the present invention. 
         FIG. 3  is also another perspective view showing the assembly of the wheel grinder according to the preferred embodiment of the present invention. 
         FIG. 4  is a side plan view showing the operation of the wheel grinder according to the preferred embodiment of the present invention. 
         FIG. 5  is another side plan view showing the operation of the wheel grinder according to the preferred embodiment of the present invention. 
         FIG. 6  is also another side plan view showing the operation of the wheel grinder according to the preferred embodiment of the present invention. 
         FIG. 7  is still another perspective view showing the assembly of the wheel grinder according to the preferred embodiment of the present invention. 
         FIG. 8  is a cross sectional view showing the assembly of a part of the wheel grinder according to the preferred embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     With reference to  FIGS. 1-3 , a wheel grinder according to a preferred embodiment of the present invention comprises: a body  10 , a work table  11 , a vertical limitation frame  12  connected on a rear side of the work table  11 , a movable adjustment portion  20  configured to move vertically and accommodated in the vertical limitation frame  12 , a grinding wheel portion  24  extending outward from a front side of the movable adjustment portion  20 , and a motor  26  fixed on a rear side of the movable adjustment portion  20 , wherein the grinding wheel portion  24 , the movable adjustment portion  20 , and the motor  26  form an operation structure of the wheel grinder. 
     The vertical limitation frame  12  has two fixing holders  13  arranged on two sides of a bottom of the vertical limitation frame  12  respectively, two mountings  21  locked beside the two fixing holders  13  respectively, and two first screw rods  22  and two second screw rods  23  which are inserted through the two mountings  21  respectively and abut against a bottom of the movable adjustment portion  20 . 
     Referring to  FIGS. 4-6 , when the two first screw rods  22  are adjustably moved upward, a front end of the grinding wheel portion  24  tilts upward, and when the two second screw rods  23  are adjustably moved upward, a rear end of the grinding wheel portion  24  tilts upward, such that the two first screw rods  22  or the two second screw rods  23  are adjustably moved upward so that the grinding wheel portion  24  tilts forward or rearward to grind a workpiece accurately. 
     As shown in  FIGS. 7 and 8 , a stop cover  30  is covered on the grinding wheel portion  24  and includes a defining plate  31  configured to define a connection shaft  25  and an opening  32  inside the defining plate  31  so that after the wheel grinder grinds the workpiece to produce grinding dusts, the grinding dusts are collected inside the defining plate  31  so as to be drawn out of the wheel grinder via the opening  32 . 
     While the preferred embodiments of the invention have been set forth for the purpose of disclosure, modifications of the disclosed embodiments of the invention and other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.