Abstract:
The present invention is primarily assembled from a main body, a lifting device, a control switch, a grinding device, a nozzle apparatus, and a dust collecting device. The main body includes a first casing, and a second casing disposed within the first casing. The lifting device enables raising and lowering of the first casing relative to the second casing for adjustment to a suitable height. An operating area at the top of the first casing is equipped with the control switch. The nozzle apparatus includes an air compressor, a dryer, a sand storage tank, and a nozzle, which facilitate the user in operational use, and enable powerful collection of dust. In particular, during the sand blasting process, the present invention enables optimum handling of environmental dust pollution.

Description:
BACKGROUND OF THE INVENTION 
     (a) Field of the Invention 
     The present invention creation relates to a grinding workbench, and more particularly to a grinding workbench with improved structure that provides the user with a design that conforms to ergonomics, is easy to use, and enables powerful collection of dust. Moreover, the grinding workbench with improved structure is able to remove burrs from extruded objects, remove surface dirt and finish the surface of objects using a sand blasting method. 
     (b) Description of the Prior Art 
     The majority of grinding workbenches or grinding machines of the prior art have a fixed structure and height, and mainly have an open structure. Therefore, it is necessary to accommodate the height of the grinding workbench or grinding machine when operating such machines. 
     However, because the operation mode and angle of such grinding workbenches or grinding machines are usually fixed by the structural configuration, thus, when the height of the grinding workbench or grinding machine is not appropriate to the stature of the operator, and because of the inability to adjust the height of the machine, it causes inconvenience to the operator when operating such machines, to the extent of resulting in injury to the machine operator. 
     In addition, because the dust produced during the grinding process is inhaled into the body, this further results in injury to the health of the machine operator. Moreover, when the machine operator is finishing the surface of an object, a cutting tool or other tool must be used to manually remove the burrs of the object, remove surface dirt, and retouch the surface of the object. However, because of misoperation by the machine operator, such a method directly leads to very easily damaging the surface of the object. 
     Hence it can be seen that are still a great many shortcomings in the grinding workbenches or grinding machines of the prior art which are in need of urgent improvement. 
     SUMMARY OF THE INVENTION 
     A primary objective of the present invention lies in providing a grinding workbench with improved structure that provides the user with a design that conforms to ergonomics, is easy to use, and enables powerful collection of dust. Moreover, the grinding workbench with improved structure is able to remove burrs from extruded objects, remove surface dirt and finish the surface of objects using a sandblasting method. 
     In order to achieve the aforementioned objective, the grinding workbench with improved structure of the present invention comprises: a main body, which consists of a first casing, and a second casing disposed within the first casing, the second casing is equipped with a lifting device, which is assembled from a lifting platform disposed in the second casing, and a lifting rod joined to the lifting platform and connected to the first casing, thereby enabling a raising and lowering movement of the first casing; an operating area configured on the top of the first casing, a dust collecting opening is defined in the operating area, and a transparent component is disposed on the top surface of the operating area, a light emitting component is disposed on the inner side of the top surface of the operating area, and an operating opening is formed in each of two side walls of the operating area, with the operating openings providing passage to the interior of the operating area, in addition, a control switch is located inside the operating area, a grinding device is electrically connected to the control switch, and a nozzle apparatus is electrically connected to the control switch, the nozzle apparatus comprises: an air compressor that enables compressing outside air, a dryer that is connected to the air compressor and filters high-pressure gas carrying moisture content to become dry high-pressure gas, a sand storage tank that is connected to the dryer through a tube and mixes the dry high-pressure gas with internal sand grains, and an outlet tube that is connected to the sand storage tank, a nozzle is used to blow out the dry high-pressure gas mixed with sand grains. The present invention further comprises a dust collecting device disposed within the second casing and coupled to the dust collecting opening of the operating area. 
     According to one embodiment of the present invention, the dust collecting device comprises a filter screen disposed at the dust collecting opening, a dust bag connected to the dust collecting opening, a high density filter disposed beneath the dust bag, and a dust collector installed beneath a high density filter. Accordingly, the dust collector is able to adsorb and concentrate the dust produced inside the operating area into the dust bag by passing through the dust collecting opening, and then through the filter screen and the high density filter. 
     According to one embodiment of the creation, the top surface of the operating area has an inclined configuration. 
     According to one embodiment of the present invention, an enlarging component can be installed on the top surface of the operating area. The enlarging component can be a magnifying glass. Magnetic bodies are fitted to the enlarging component to attach the enlarging component to the first casing. Moreover, the magnetic bodies enable attaching the enlarging component to cover any position on the top surface of the operating area. 
     According to one embodiment of the present invention, the exterior of the main body is narrow at the front side and wide at the rear side, presenting a slightly diamond shaped body, thus truly conforming to ergonomics design, and enabling convenient operation while sitting down. 
     According to one embodiment of the present invention, at least one draft hole is formed in the first casing close to one end of the transparent component. 
     Another objective of the present invention lies in using high-pressure gas mixed with sand grains blown from the nozzle to implement a method of indirect and non-direct contact to remove burrs and surface dirt from extruded objects, and finish the surface of the objects, thereby preventing damage to the surface of the objects. 
     To enable a further understanding of said objectives and the technological methods of the invention herein, a brief description of the drawings is provided below followed by a detailed description of the preferred embodiments. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a structural schematic view of a three-dimensional perspective of a grinding workbench of the present invention. 
         FIG. 2  is a top structural schematic view of the grinding workbench of the present invention. 
         FIG. 3  is a structural schematic view of a nozzle apparatus of the present invention. 
         FIG. 4  is a perspective structural schematic view of the grinding workbench of the present invention. 
         FIG. 5  is a schematic view depicting displacement of a first casing of the grinding workbench of the present invention. 
         FIG. 6  is a schematic view depicting the risen top surface of an operating area of the grinding workbench of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to  FIGS. 1 to 6 , which respectively show a structural schematic view of a three-dimensional perspective, a top structural schematic view, a structural schematic view of a nozzle apparatus, a perspective structural schematic view, a schematic view depicting displacement of a first casing, and a schematic view depicting the risen top surface of an operating area of a grinding workbench of the present invention. The present invention is a grinding workbench with improved structure, with a grinding workbench  1  being primarily assembled from a main body  10 , a lifting device  11 , a control switch  12 , a grinding device  13 , a nozzle apparatus  14 , and a dust collecting device  15 . In which the main body  10  comprises a first casing  101 , and a second casing  102  disposed within the first casing  101 . The lifting device  11  is installed inside the second casing  102 , and the lifting device  11  is assembled from a lifting platform  110  disposed in the second casing  102 , and a lifting rod  111  that is joined to the lifting platform  110  and also connected to the first casing  101 , thereby enabling the lifting rod  111  to effect a raising and lowering movement of the first casing  101 , and allowing the user to adjust the workbench to a suitable height. The top end of the first casing  101  is configured with an inclined operating area  103  that conforms to ergonomics design. A dust collecting opening  104  is defined in the operating area  103 , and a transparent component  105  is disposed on the top surface of the operating area  103 . A light emitting component  106  is disposed on the inner side of the top surface of the operating area  103 . An operating opening  107  is formed in each of two side walls of the operating area  103 , and the operating openings  107  provide passage to the interior of the operating area  103 . In addition, the control switch  12  is installed inside the operating area  103 , and the grinding device  13  is electrically connected to the control switch  12 . A nozzle apparatus  14  is further electrically connected to the control switch  12 . The nozzle apparatus  14  comprises: an air compressor  140  that compresses outside air; a dryer  142  that is connected to the air compressor  140  and filters moist high-pressure gas to become dry high-pressure gas; a sand storage tank  144  that mixes the dry high-pressure gas with internal sand grains through a tube connected to the dryer  142 ; a nozzle  146  provided with an output tube that is connected to the sand storage tank  144  and which is used to blow out the dry high-pressure gas mixed with sand grains; and the dust collecting device  15  that is disposed within the second casing  102  and connected to the dust collecting opening  104  in the operating area  103 . 
     In addition, the dust collecting device  15  of the aforementioned structure further comprises a filter screen  150  installed on the dust collecting opening  104 ; a dust bag  152  connected to the dust collecting opening  104 ; a high density filter  154  disposed beneath the dust bag  152 ; and a dust collector  156  installed beneath the high density filter  154 . Accordingly, the dust collector  156  is able to adsorb and concentrate the dust produced inside the operating area  103  into the dust bag  152  by passing through the dust collecting opening  104 , and then through the filter screen  150  and the high density filter  154 . The top surface of the aforementioned operating area  103  has an inclined configuration to facilitate operation. Moreover, a plurality of mobile wheels  16  can be fitted to the bottom portion of the main body  10 , and an enlarging component  108  (such as a magnifying glass) can be installed on the top surface of the operating area  103  to increase the degree of precision and accuracy of the sand blasting process. Magnetic bodies  1080  are installed on the enlarging component  108  to attach the enlarging component  108  to the first casing  101 . The magnetic bodies  1080  further enable the enlarging component  108  to cover any position on the top surface of the operating area  103 . Furthermore, the exterior of the main body  10  is narrow at the front side and wide at the rear side, presenting a slightly diamond shaped body, allowing for easy operation of the grinding workbench  1  by the user, and causing the two sides of the main body  10  to form an open-ended space  109 . 
     The aforementioned transparent component  105  can be made from plastic or glass to facilitate the user in operating the grinding workbench  1 . Furthermore, the top surface of the operating area  103  has an inclined configuration that conforms to ergonomics design, and raising and closing of the top surface corresponds to the configuration of the main body  10 . Moreover, the light emitting component  106  is located on the inner side of the top surface, thereby enabling the light-emitting component  106  to further illuminate the operating area  103 . The two hands of the user respectively pass through the operating openings  107  on the two sides of the operating area  103  and extend into the interior of the operating area  103  to operate the grinding workbench  1 . In addition, the control switch  12  installed inside the operating area  103  enables the user to directly operate the grinding workbench  1  from the interior of the operating area  103 . The control switch  12  is further used to control opening and closing of the power supply as well as raising or lowering of the first casing  101 . 
     Raising or lowering of the first casing  101  is effected through the lifting device  11 , which is primarily assembled from the lifting platform  110  and the lifting rod  111 . The lifting platform  110  is fitted to the second casing  102 , and the lifting rod  111  is joined to the lifting platform  110 . The lifting rod is also connected to the first casing  101 , thereby enabling a raising or lowering movement of the first casing  101  to adjust the height of the grinding workbench  1 . 
     The aforementioned enlarging component  108  can be a magnifying glass, and the magnetic bodies  1080  fitted to a peripheral frame of the enlarging component  108  enable attaching the enlarging component  108  to the top surface of the operating area  103 . The enlarging component  108  further enlarges the view of an object to be ground within the operating area  103 , thereby enabling the user to better carry out precise and accurate grinding. Furthermore, fitting of the magnetic bodies  1080  enable the enlarging component  108  to be movably located to any position on the top surface of the operating area  103 . 
     The aforementioned grinding device  13  is disposed within the operating area  103  of the main body  10  to facilitate direct use by the user, and is electrically connected to the control switch  12  inside the operating area  103 , thereby enabling the control switch  12  to control rotational speed of the grinding device  13 . The grinding device  13  can be a conventional grinding machine or a hand grinding machine. 
     The aforementioned nozzle apparatus  14  comprises: the air compressor  140 , the dryer  142 , the sand storage tank  144 , and the nozzle  146 . The air compressor  140  compresses outside air. Moreover, the air compressor  140  also filters high-pressure gas carrying moisture content to become dry high-pressure gas through use of the dryer  142 , and further mixes the dry high-pressure gas with sand grains stored inside the sand storage tank  144  through a tube connected to the dryer  142 , then the dry high-pressure gas mixed with sand grains is blown out from the nozzle  146  connected to the sand storage tank  144  through an output tube. After which the dust collecting device  15 , which is connected to the dust collecting opening  104  of the operating area  103  and disposed within the second casing  102 , is used adsorb and filter dust. Because of at least one draft hole  1010  formed in the first casing  101  close to one end of the transparent component  105 , thus, at the same time as collecting the dust, air is caused to circulate to maintain convection and achieve dust collecting effectiveness. 
     The aforementioned dust collecting device  15  is disposed inside the operating area  103  of the second casing  102 , and the dust collecting device  15  is further connected to the dust collecting opening  104  of the operating area  103 . The dust collecting device  15  comprises the filter screen  150  installed on the dust collecting opening  104 , the dust bag  152  connected to the dust collecting opening  104 , the high density filter  154  disposed beneath the dust bag  152 , and the dust collector  156  installed beneath the high density filter  154 . Accordingly, the dust collector  156  is able to adsorb and concentrate the dust produced inside the operating area  103  into the dust bag  152  by passing through the dust collecting opening  104 , and then through the filter screen  150  and the high density filter  154 . 
     Each of the aforementioned mobile wheels  16  is fitted to the bottom portion of the main body  10 , and are used to enable movement of the main body  1 . When a user is operating the grinding workbench  1 , the user&#39;s two feet can be respectively placed on the two sides of the open-ended space  109  of the main body  10 , thereby enabling the user to correctly face the top surface of the operating area  103  of the main body  10 . Whereupon, the user can extend their two hands through the operating openings  107  on the two sides of the operating area  103  into the interior of the operating area  103 . Moreover, the user is able to start up the grinding workbench  1  and control the height of the first casing  101  through use of the control switch  12  inside the operating area  103 . The user is able to use the control switch  12  to adjust the grinding workbench  1  to a suitable height by raising or lowering the first casing  101 . 
     After which, the user is able to raise the top surface of the operating area  103 , place the object to be ground within the operating area  103 , and view the position of the object to be ground through the transparent component  105  of the operating area  103 . Moreover, the enlarging component  108  enables enlarging the object to be ground to better carry out precise and accurate grinding, and further prevents injury to the user because of misoperation during the grinding process. When operating the grinding workbench  1 , the user can first turn on the grinding device  13  and the dust collecting device  15 , then proceed with grinding the object to be ground by using the grinding device  13 . The dust produced during the grinding process enters the dust collecting opening  104  at the bottom portion of the operating area  103 , and first filtering of the dust is carried out using the filter screen  150  located on the dust collecting opening  104 . The dust that passes through the filter screen  150  enters the dust bag  152  and is concentrated therein. The dust that passes through the dust bag  152  then enters the high density filter  154 , which is used to improve concentration of the dust and filter effectiveness. After which, using a method of indirect and non-direct contact to prevent damage to the surface of the object and injury to the user, the nozzle apparatus  14  uses the high-pressure gas mixed with sand grains blown out from the nozzle  146  to remove burrs from an extruded object as well as surface dirt, and finish the surface of the object. 
     It is of course to be understood that the embodiments described herein are merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.