Patent Publication Number: US-2012045978-A1

Title: Grinding workpiece

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a maintenance technique for vehicles, and more particularly to a grinding workpiece for cleaning wheel hubs of vehicles. 
     2. Description of the Related Art 
     In a conventional work of maintaining vehicles, the cleaning of wheel hubs of the vehicle does not have appropriate tools provided for operating personals. Consequently, when the wheel hubs need to be cleaned, the operating personals merely utilize improper tools, such as sandpapers and grinding wheels, to clean the surfaces of the wheel hub. The work efficiency and cleaning quality performed by the foregoing conventional tools are worse and improper. 
     SUMMARY OF THE INVENTION 
     In view of the shortcomings of the prior art, the inventor(s) of the present invention based on years of experience in the related industry to conduct extensive researches and experiments, and finally developed a grinding workpiece. 
     Therefore, it is a primary objective of the present invention to overcome the aforementioned shortcoming and deficiency of the prior art by providing a grinding workpiece that is applied in cleaning wheel hub components to improve the working efficiency and quality. 
     A second objective of the present invention is to provide a grinding workpiece. A proper grinding material is utilized to perform the grinding motion to satisfy the demand, thereby rapidly replacing the grinding material. 
     A third objective of the present invention is to provide a grinding workpiece that is suitable for different types of wheel hubs to achieve the efficacy of easily grinding. 
     A fourth objective of the present invention is to provide a grinding workpiece that properly concentrates scrap materials produced by the grinding process to effectively avoid influencing the quality of grinding work. 
     A fifth objective of the present invention is to provide a grinding workpiece that discharges scrap materials produced by the grinding process to retain the quality of grinding work. 
     To achieve the foregoing objectives, a grinding workpiece provided by the invention comprises a main body, wherein one end has a joint surface, and a containing chamber having a predetermined depth is inwardly extended from a central position of the joint surface, and an opening communicating with the containing chamber is formed on the joint surface; and a grinding material disposed on a portion corresponding to the joint surface of a periphery of the opening. 
     A more complete appreciation of the present invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a three-dimensional decomposition chart according to a first embodiment of the present invention; 
         FIG. 2  is a schematic diagram of an assembled structure according to a first embodiment of the present invention; 
         FIG. 3  is a schematic diagram of a using state according to a first embodiment of the present invention; 
         FIG. 4  is a schematic diagram of a structure according to a second embodiment of the present invention; and 
         FIG. 5  is a schematic diagram of a structure according to a third embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     With reference to  FIG. 1  to  FIG. 2  for a grinding workpiece in accordance with a first embodiment of the present invention, the grinding workpiece is composed of a main body  11 , a grinding material  21  and a pair of connection sheets  31 . 
     The main body  11  is slightly a bell shape and comprises a joint surface  12  located on a side end surface of the main body  11 . A circular flange  13  with a proper height is protruded from a periphery of the joint surface  12 . A containing chamber  14  with a proper depth is inwardly extended from a center of the joint surface  12 , and an opening  14  communicating with the containing chamber  14  is formed at a central position of the joint surface  12 . In addition, several oblique gutters  16 , which are inwardly inclined toward the containing chamber  14 , are disposed on an inner wall of the containing chamber  14 . A rib portion  17  is defined between adjacent oblique gutters  16 . A transmission shaft  18  is fixedly disposed to the main body  11  that is opposite to the joint surface  12 , and the transmission shaft  18  axially corresponds to the joint surface  12 . 
     The grinding material  21  comprises a circular substrate  22  and a circular grinding plate  23  with a proper thickness that is fixedly disposed to a plate surface of the circular substrate  22  by utilizing a side surface. Central ring holes of the circular substrate  22  and the circular grinding plate  23  respectively communicate with the opening  15  of the main body  11 , and the grinding material  21  covers each oblique gutter  16  at the opening of the joint surface  12 . A grinding plane  231  is located on a circular grinding plate  23  that is opposite to a corresponding plate surface of the circular substrate  22 . A grinding circular surface  232  is located on an internal periphery of the circular grinding plate  23 . Four gaps  233  are disposed to an external periphery of the circular grinding plate  23  at equal distances. 
     The pair of connection sheets  31  in the embodiment comprises a male pad  32  and a female pad  33  adhered to each other. The male pad  32  and the female pad  33  are respectively disposed on the joint surface  12  and the circular substrate  22  that is opposite to a side surface of the circular grinding plate  23 . 
     With the assembly of the foregoing components, the grinding material  21  is closely adhered to the main body  11  through the pair of connection sheets  31 . Simultaneously, the main body  11  is properly embedded and contained in a circular containing space formed by the circular flange  13  so that the grinding material  21  can be stably combined with the main body  11 , and the pair of connection sheets  31  may not come off due to the imposition of excess lateral force at the horizontal direction, resulting in influencing the grinding work. 
     While using the invention, as shown in  FIG. 3 , power sources, such as a normal pneumatic power or an electric power, can be utilized to drive the main body  11  to rotate through the transmission shaft  18  so that the grinding material  21  could grind a wheel hub of a vehicle to have an advantage of convenient utilization. Moreover, a protrusion body  41  of the wheel hub can be properly contained in the containing chamber  14  through the invention so that the grinding plane  231  of the grinding material  21  can properly paste on the disc of the wheel hub to perform the grinding work. In the meantime, the grinding circular surface  232  located on the inner periphery of the circular grinding plate  23  surrounds the periphery of the protrusion body  41  of the wheel hub, and the grinding circular surface  232  could grind the periphery of the protrusion body  41  of the wheel hub to rapidly complete the required grinding work. 
     Further, when the grinding work is performed by the invention, the produced scrap materials can be quickly discharged by the gaps  233  of the circular grinding plate  23  and enter into the containing chamber  14  of the main body via the central ring hole of the circular grinding plate  23 . The scrap materials can be concentrated by the generated centrifugal force to the oblique gutter  15  under the rotation of the main body  11 . The scrap materials then are removed after completing the grinding work. Therefore, the grinding workpiece provided by the invention can complete the grinding work with high quality. 
     The grinding material  21  of the invention is combined to the main body  11  through a replaceable combination. When the grinding material  21  would like to be replaced, its replacing motion is quite simple and convenient. While performing the motion of replacing the grinding material  21 , each oblique gutter  16  can be stretched by fingers of an operating persona to obtain a better point of application so that the motion of replacing the grinding material  21  can be faster. 
     Each oblique gutter  16  does not only have the foregoing effects, but also facilitates reducing the volume and weight of the main body  11 . The rib portion  17  composed between the adjacent oblique gutters  16  could properly support the grinding material  21 . Accordingly, the grinding material  21  can properly lean against the surface to be ground during the grinding process. 
     With reference to  FIG. 4  for a grinding workpiece in accordance with a second embodiment of the invention, the basic composition is approximately similar to the foregoing first embodiment, and the difference is that the grinding workpiece provided the second embodiment could satisfy the demand of wheel hubs having a longer protrusion. In the embodiment, the composition of the grinding material  21  does not only comprise related components, including the circular substrate  22  and the circular grinding plate  23  that are the same as the first embodiment, but also comprises an extension pipe  24  with a proper length that is cascaded between the circular substrate  22  and the joint surface  12  to extend the length, which is protruded from the wheel hub, capable of being contained by the grinding workpiece of the invention. In addition, two side ends of the extension pipe  24  individually connected between the joint surface  12  and the circular substrate  22  are mutually connected by the connection sheets  31 . 
     With reference to  FIG. 5  for a grinding workpiece in accordance with a third embodiment of the invention, the composition does not only comprise the whole components depicted by the foregoing second embodiment, but also comprises a base  111 , an extension pipe sheath  112  with a proper length connected to the base  111  through one end thereof, and a top cover  113  fastened to another end of the extension pipe sheath  112  on the main body  11 . Accordingly, the main body  11  could face the actual demand to achieve the requirement of changing the depth of the containing chamber  14  by installing the extension pipe sheath  112  so that the invention can be applied in grinding different types of wheel hubs. 
     The present invention improves over the prior art and complies with patent application requirements, and thus is duly filed for patent application. While the invention has been described by device of specific embodiments, numerous modifications and variations could be made thereto by those generally skilled in the art without departing from the scope and spirit of the invention set forth in the claims.